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National Cancer Institute

at the National Institutes of Health

NCI Drug Dictionary

More NCI Dictionaries

pixantrone dimaleate

The dimaleate salt of a synthetic, noncardiotoxic aza-anthracenedione analogue with potential antineoplastic activity. Pixantrone intercalates into DNA and induces topoisomerase II-mediated DNA strand crosslinks, resulting in inhibition of DNA replication and tumor cell cytotoxicity. Check for or using this agent. ()

placebo

An inactive substance, treatment or procedure that is intended to provide baseline measurements for the experimental protocol of a clinical trial. Check for or using this agent. ()

pladienolide derivative E7107

A synthetic urethane derivative of pladienolide D with potential antineoplastic activity. Pladienolide derivative E7107 is generated from the 12-membered macrolide pladienolide D, one of several macrolides derived from the bacterium Streptomyces platensis Mer-11107. This agent appears to bind to the 130-kDa subunit 3 (spliceosome-associated protein 130; SAP130) of the splicing factor 3b (SF3b), resulting in inhibition of pre-messenger RNA splicing and the arrest of cell-cycle progression. The splicing factor SF3b is a multiprotein complex integral to the accurate excision of introns from pre-messenger RNA; the subunit SAP130 associates with U2 snRNP and is recruited to prespliceosomal complexes. Check for or using this agent. ()

Plan B

(Other name for: levonorgestrel)

plant-derived hematopoiesis enhancer PG2

A proprietary botanical formulation derived from a traditional Chinese medicinal (TCM) plant with hematopoietic activity. Although the mechanism of action has yet to be fully elucidated, plant-derived hematopoiesis enhancer PG2 appears to stimulate multi-lineage progenitor cells that may be closely related to the hematopoietic stem cell. In both chemotherapy- and radiation therapy-induced animal models of myelosuppression, this agent has been shown to restore granulocyte, erythrocyte, and platelet counts to normal levels. Plant-derived hematopoiesis enhancer PG2 stimulates the production of numerous cytokines such as granulocyte-colony stimulating factor (G-CSF) and may stimulate the production of neuroendocrine hormones. Check for or using this agent. ()

plasmid encoding antiangiogenic metargidin peptide

A plasmid encoding the protein antiangiogenic metargidin plasmid (AMEP), the disintegrin domain of ADAM-15 (metargidin), with potential antiangiogenic and antimetastatic activities. Upon intratumoral electrotransfer of plasmid encoding AMEP, AMEP binds to cellular integrin receptors alpha-v-beta-3 (avb3) and alpha-5-beta-1 (a5b1), which are upregulated on activated endothelial cells and a variety of tumor cells. Binding to the integrin receptors may inhibit angiogenesis and may inhibit tumor cell proliferation. Check for or using this agent. ()

Platinol

(Other name for: cisplatin)

Platinol-AQ

(Other name for: cisplatin)

Plavix

(Other name for: clopidogrel bisulfate)

PLED-based MnSOD mimetic

A derivative of pyridoxyl ethyldiamine (PLED) and mimetic of the human mitochondrial manganese superoxide dismutase (MnSOD), with antioxidant, metal chelating and potential chemoprotective activities. Upon administration, PLED-based MnSOD mimetic mimics MnSOD and scavenges oxygen free radicals such as superoxide anion, hydrogen peroxide, and hydroxyl radical, thereby preventing oxygen free radical damage to macromolecules such as DNA and minimizing oxygen free radical-related chemotoxicity in normal tissues. In addition, this agent is able to strongly bind to iron. Check for or using this agent. ()

pleiotropic pathway modifier CC-122 hydrochloride

The hydrochloride salt form of CC-122, an orally available pleiotropic pathway modulator with potential antineoplastic activity. Check for or using this agent. ()

plerixafor

A bicyclam with hematopoietic stem cell-mobilizing activity. Plerixafor blocks the binding of stromal cell-derived factor (SDF-1alpha) to the cellular receptor CXCR4, resulting in hematopoietic stem cell (HSC) release from bone marrow and HSC movement into the peripheral circulation. Check for or using this agent. ()

plevitrexed

An orally bioavailable, small molecule, non-polyglutamatable, antifolate quinazoline derivative thymidine synthetase inhibitor with potential antineoplastic activity. Plevitrexed is transported into the cell via the physiological reduced folate carrier (RFC) system. Intracellularly, this agent selectively binds to the folate binding site of thymidylate synthase and inhibits thymidine synthesis, which may result in DNA synthesis inhibition and apoptosis. Check for or using this agent. ()

plicamycin

An antibiotic isolated from the bacterium Streptomyces plicatus with antineoplastic activity. Plicamycin, also known as mithramycin, binds to the minor groove of DNA at GC-rich sites, resulting in inhibition of RNA synthesis; this agent also inhibits mRNA expression, resulting in a reduction in protein synthesis. In addition, plicamycin may inhibit bone resorption by down regulating transcription of c-src, an oncogene involved in bone metabolism and resorption. Check for or using this agent. ()

plinabulin

An orally active diketopiperazine derivative with potential antineoplastic activity. Plinabulin selectively binds to the colchicine-binding site of tubulin, thereby interrupting equilibrium of microtubule dynamics; mitotic spindle assembly is disrupted, resulting in cell cycle arrest at the M phase and blockage of cell division in tumor cells. In addition, this agent induces tubulin depolymerization in vascular endothelial cells, resulting in the disruption of tumor blood vessel architecture and a selective collapse of tumor vasculature. Check for or using this agent. ()

plitidepsin

A cyclic depsipeptide isolated from the marine tunicate Aplidium albicans. Plitidepsin displays a broad spectrum of antitumor activities, inducing apoptosis by triggering mitochondrial cytochrome c release, initiating the Fas/DC95, JNK pathway and activating caspase 3 activation. This agent also inhibits elongation factor 1-a, thereby interfering with protein synthesis, and induces G1 arrest and G2 blockade, thereby inhibiting tumor cell growth. Check for or using this agent. ()

PLK1 inhibitor TAK-960

An orally available, Polo-like kinase 1 (PLK1) inhibitor with potential antineoplastic activity. Polo-like kinase 1 inhibitor TAK-960 selectively inhibits PLK1, inducing selective G2/M cell-cycle arrest followed by apoptosis in a variety of tumor cells while causing reversible cell-cycle arrest at the G1 and G2 stages without apoptosis in normal cells. PLK1 inhibition may result in the inhibition of proliferation in PLK1-overexpressed tumor cells. PLK1, named after the polo gene of Drosophila melanogaster, is a serine/threonine kinase crucial in the regulation of mitosis. Check for or using this agent. ()

PM00104

A synthetic tetrahydroisoquinoline alkaloid related to the marine natural compounds Jorumycin and the family of Renieramycins, obtained from molluscs and sponges, respectively, with potential antineoplastic activity. PM00104 reversibly binds to DNA and interferes with DNA replication, transcription, and translation. DNA binding by this agent does not trigger DNA damage checkpoint responses, hence PM00104 exhibits a reversible cytotoxicity. Check for or using this agent. ()

pneumococcal 7-valent conjugate vaccine

An active immunizing agent used to prevent infection by the bacterium Streptococcus pneumoniae. Pneumococcal 7-valent conjugate vaccine consists of a solution of saccharides of the capsular antigens of Streptococcus serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F individually conjugated to diphtheria CRM 197 protein. Check for or using this agent. ()

pneumococcal polyvalent vaccine

An polyvalent vaccine used to prevent infection by the bacterium Streptococcus pneumoniae. Pneumococcal polyvalent vaccine contains higly purified capsular antigens from the 23 most prevalent or invasive pneumococcal types of Streptococcus pneumoniae to ensure cross-protection. Following vaccination, protective capsular type-specific antibody levels typically develop by the third week; serotype-specific antibody levels generally decline after 5-10 years. Check for or using this agent. ()

Pneumovax 23

(Other name for: pneumococcal polyvalent vaccine)

pNGVL3-hICD vaccine

A plasmid DNA cancer vaccine encoding the intracellular domain (ICD) of the HER-2/neu proto-oncogene. Upon administration and after cellular uptake by skin or muscle cells, the pNGVL3-hICD vaccine plasmid expresses the HER-2/neu protein, which, after intracellular processing, may elicit both antigen-specific cytotoxic T-lymphocyte (CTL) and humoral immune responses against tumor cells expressing HER-2. The HER-2/neu ICD protein is highly immunogenic and, as a subdominant epitope, may be associated with decreased immune tolerance. Check for or using this agent. ()

pNGVL4a-CRT/E7(detox) DNA vaccine

A cancer vaccine consisting of the DNA plasmid pNGVL4a-A encoding calreticulin (CRT) linked to a detox form of human papillomavirus (HPV) type 16 E7 antigen, with potential immunomodulating and antineoplastic activities. Upon administration, this vaccine may generate a potent cytotoxic T-lymphocyte (CTL) response against E7-expressing tumor cells, resulting in tumor cell death. For E7(detox), the amino acids in E7 at positions 24 (cysteine to glycine) and 26 (glutamic acid to glycine) were substituted. CRT, a 46 kDa protein located in the lumen of the cell's endoplasmic reticulum (ER), may potentiate MHC class I presentation of HPV-16 E7 to E7-specific CD8-positive T cells. In addition, pNGVL4a-A contains two short immunostimulatory DNA sequences (ISS) in the noncoding region, which may elicit the production of IFN- and IL-12 in transfected keratinocytes and dermal antigen presenting cells (APCs), resulting in a potent T helper cell type 1 response. Check for or using this agent. ()

pNGVL4a-Sig/E7(detox)/HSP70 DNA vaccine

An antigen-specific DNA cancer vaccine consisting of the coding sequences of a signal peptide (pNGVL4a-Sig), a detox form of the human papillomavirus type 16 (HPV-16) antigen E7, and the heat shock protein 70 (HSP70). Upon administration, this vaccine may generate potent cytotoxic CD8(+) T-cell responses against E7-expressing tumor cells, resulting in tumor cell death. Check for or using this agent. ()

PNP-expressing ovine atadenovirus FP253

An ovine atadenovirus encoding E. coli purine nucleoside phosphorylase (PNP) with prodrug activating activity. Under the control of a prostate-directed promoter, PNP-expressing atadenovirus vaccine FP253 expresses PNP in prostate tissue only after intraprostatic administration; this enzyme catalyzes systemically administered fludarabine prodrug into the active agent, 2-fluoroadenine. Localized prodrug activation provides prostate-targeted chemotherapy, potentially reducing systemic side effects. Check for or using this agent. ()

Pnu-Imune 23

(Other name for: pneumococcal polyvalent vaccine)

polifeprosan 20 with carmustine implant

A synthetic, biodegradable wafer containing the agent carmustine with antineoplastic activity. Used to deliver drug directly into a brain tumor site and typically implanted post-surgically, the wafer is made of a biodegradable poly-anhydride copolymer and contains the nitrosourea carmustine. As an antineoplastic nitrosourea, carmustine alkylates and cross-links DNA during all phases of the cell cycle, resulting in disruption of DNA function, cell cycle arrest, and apoptosis. Carmustine also carbamoylates proteins, including DNA repair enzymes, resulting in an enhanced cytotoxic effect. Carmustine is highly lipophilic and crosses the blood-brain barrier readily. Check for or using this agent. ()

Polo-like kinase 1 inhibitor GSK-461364

A small molecule Polo-like kinase 1 (PLK1) inhibitor with potential antineoplastic activity. Polo-like kinase 1 inhibitor GSK461364 selectively inhibits Plk1, inducing selective G2/M arrest followed by apoptosis in a variety of tumor cells while causing reversible cell arrest at the G1 and G2 stage without apoptosis in normal cells. Plk1, named after the polo gene of Drosophila melanogaster, is a serine/threonine protein kinase involved in regulating mitotic spindle function in a non-ATP competitive manner. Check for or using this agent. ()

Polo-like kinase 1 inhibitor MK1496

An orally bioavailable Polo-like kinase 1 (Plk1) inhibitor with potential antineoplastic activity. Polo-like kinase 1 inhibitor MK1496 selectively inhibits Plk1, inducing selective G2/M arrest followed by apoptosis in a variety of tumor cells while causing reversible cell arrest at the G1 and G2 stage without apoptosis in normal cells. Plk1, named after the polo gene of Drosophila melanogaster, is a serine/threonine protein kinase involved in regulating mitotic spindle function in a non-ATP competitive manner. Check for or using this agent. ()

Polo-like kinase 1 inhibitor NMS-1286937

An orally bioavailable, small-molecule Polo-like kinase 1 (PLK1) inhibitor with potential antineoplastic activity. Polo-like kinase 1 inhibitor NMS-1286937 selectively inhibits PLK1, inducing selective G2/M cell-cycle arrest followed by apoptosis in a variety of tumor cells while causing reversible cell-cycle arrest at the G1 and G2 stages without apoptosis in normal cells. PLK1 inhibition may result in the inhibition of proliferation in PLK1-overexpressing tumor cells. PLK1 is a serine/threonine protein kinase crucial in the regulation of mitosis. Check for or using this agent. ()

poly AU

A synthetic polyadenylic-polyuridylic acid double-stranded RNA. Poly AU may stimulate the release of cytotoxic cytokines and, by inducing the production of interferon, may increase the number and tumoricidal activities of various immunohematopoietic cells. Check for or using this agent. ()

poly IC

A synthetic polyinosinic-polycytidylic acid double-stranded RNA. Poly IC may stimulate the release of cytotoxic cytokines and, by inducing interferon-gamma production, may increase the number and tumoricidal activities of various immunohematopoietic cells. Check for or using this agent. ()

poly ICLC

A synthetic complex of carboxymethylcellulose, polyinosinic-polycytidylic acid, and poly-L-lysine double-stranded RNA. Poly ICLC may stimulate the release of cytotoxic cytokines and, by inducing interferon-gamma production, may increase the tumoricidal activities of various immunohematopoietic cells. Check for or using this agent. ()

poly-alendronate dextran-guanidine conjugate

A polybisphosphonate dextran-guanidine conjugate with potential anti-resorptive and antineoplastic activities. Alendronic acid and aminoguanidine were conjugated sequentially to oxidized dextran resulting in an average of 8 alendronate and 50 guanidine groups coupled to the dextran backbone. Upon administration, the poly-alendronate dextran-guanidine conjugate inhibits the mevalonate pathway by inhibiting farnesyl diphosphate synthase (FDPS) which leads to a reduction in protein prenylation and to the loss of downstream metabolites essential for osteoclast function. This eventually leads to the induction of apoptosis in osteoclasts. Also, by preventing osteoclast-mediated bone resorption, this agent decreases bone turnover and stabilizes the bone matrix. The guanidine moiety increases the nitrogen content and possibly the activity of the bisphosphonate and its ability to inhibit FDPS. In addition, the guanidine moiety facilitates cell internalization and may contribute to this agent’s cytotoxicity. Check for or using this agent. ()

poly-TLR agonist polyantigenic vaccine CADI-05

A poly-Toll-like receptor (TLR) agonist polyantigenic vaccine containing heat killed Mycobacterium indicus pranii (Mycobacterium w or Mw) with potential immunostimulating and antineoplastic activities. Upon administration, poly-TLR agonist polyantigenic vaccine activates a number of TLRs, which may result in macrophage and plasmacytoid dendritic cell (pDC) stimulation; secretion of interferon alpha; production of pro-inflammatory cytokines; upregulation of co-stimulatory molecules, enhanced T and B-cell stimulatory responses; T cell proliferation, and a Th1 immune response. TLRs are transmembrane receptors that recognize structurally conserved microbial molecules such as bacterial cell-surface lipopolysaccharides (LPS), lipoproteins, lipopeptides, lipoarabinomannan and flagellin, among others; immune responses stimulated by TLR activation may result in antineoplastic effects. Check for or using this agent. ()

polyacrylamide hydrogel

A transparent, biocompatible, non-resorbable, homogenous hydrogel containing 97.5% apyrogenic water and 2.5% of the cross-linked, synthetic polyacrylamide. Upon injection into the urethral submucosal tissue, the polyacrylamide hydrogel serves as a bulk forming agent and may possibly increase the strength of the urethral sphincter and thereby prevent or decrease stress-induced urinary incontinence. Check for or using this agent. ()

polyamine analogue PG11047

A second generation polyamine analogue, synthesized through the restriction of molecular conformations of parent polyamine compounds, with potential antineoplastic activity. Polyamine analogue PG11047 may displace endogenous polyamines from DNA binding sites, thereby interfering with cell cycle processes dependent upon polyamine binding and function, and resulting in cell-cycle arrest, induction of apoptosis, depletion of polyamines, and interference with gene and ligand-receptor activities involved with cell growth. This agent may exhibit decreased toxicity and enhanced cytotoxicity profiles compared to first-generation polyamine compounds. In tumor cells, there is an increase dependence on polyamines as well as a dysregulated polyamine metabolic pathway resulting in abnormal or sustained tumor growth. Check for or using this agent. ()

polyethylene glycol 1000 cetyl ether cream

A cream containing a non-ionic surfactant belonging to the polyethylene glycol (PEG) family. Polyethylene glycol 1000 cetyl ether is used as an ointment base, but can also be used as an emulsifier and solubilizer. Check for or using this agent. ()

polyethylene glycol recombinant endostatin

A formulation containing recombinant endostatin attached to polyethylene glycol (PEG), with potential anti-angiogenic and antineoplastic activities. Endostatin, a 20 kDa C-terminal proteolytic fragment of collagen XVIII, induces microvascular endothelial cell apoptosis and inhibits endothelial proliferation and angiogenesis, which may result in a reduction of tumor cell growth. Modification with PEG extends the circulation half-life of endostatin, improves stability and increases solubility in organic solvents. Check for or using this agent. ()

polyethyleneglycol-7-ethyl-10-hydroxycamptothecin

A polyethylene glycol (PEG) conjugate of 7-ethyl-10-hydroxycamptothecin with potential antineoplastic activity. After hydrolysis in vivo, 7-ethyl-10-hydroxycamptothecin (SN38), an active metabolite of irinotecan, is released from polyethyleneglycol-7-ethyl-10-hydroxycamptothecin (PEG-SN38); 7-ethyl-10-hydroxycamptothecin selectively stabilizes topoisomerase I-DNA covalent complexes, resulting in single-stranded and double-stranded DNA breaks, the inhibition of DNA replication, and the induction of apoptosis. This agent is designed to deliver the active metabolite to tumor cells without the need for conversion as is the case with irinotecan. Compared to unPEGylated 7-ethyl-10-hydroxycamptothecin, PEGylation improves solubility and allows for parental delivery, and may result in a longer half-life and higher exposure for tumor cells. Check for or using this agent. ()

Polygam S/D

(Other name for: therapeutic immune globulin)

polyglutamate camptothecin

A therapeutic formulation consisting of camptothecin, an alkaloid isolated from the Chinese tree Camptotheca acuminata, conjugated with polyglutamate. During the S phase of the cell cycle, camptothecin selectively stabilizes topoisomerase I-DNA covalent complexes, thereby inhibiting religation of topoisomerase I-mediated single-strand DNA breaks and producing potentially lethal double-strand DNA breaks when encountered by the DNA replication machinery. Conjugation with polyglutamate renders this agent more water soluble and less toxic than the parent molecule. Check for or using this agent. ()

polymeric camptothecin prodrug XMT-1001

A polymeric prodrug of camptothecin (CPT) with potential antineoplastic activity. Polymeric camptothecin prodrug XMT-1001 consists of CPT conjugated to the 60-70 kDa, inert, bio-degradable, hydrophilic copolymer poly[1-hydroxymethylene hydroxymethyl formal] (PHF). Through a dual-phase, non-enzymatic release mechanism, CPT is first released in plasma from XMT-1001 as the lipophilic prodrugs CPT-SI (a succinimidoglycinate derivative) and CPT-SA (a succinamidoyl glycinate derivative), which are then hydrolyzed within tissues to release the lactone form of CPT. CPT inhibits the catalytic activity of DNA topoisomerase I, thereby inhibiting DNA replication and inducing apoptosis. This agent may exhibit a more favorable pharmacokinetic profile than other agents in the same class. Check for or using this agent. ()

Polymox

(Other name for: amoxicillin)

Polyphenon E Ointment

(Other name for: kunecatechins ointment)

polysaccharide-K

A protein-bound polysaccharide derived from the mushroom Trametes versicolor (Turkey Tail) with immunoadjuvant and potential antitumor activities. Although its mechanism of action has yet to be fully elucidated, in vitro and in vivo studies indicate that polysaccharide-K induces peripheral blood monocyte secretion of IL-8 and TNF-alpha, induces T cell proliferation, and prevents cyclophosphamide-induced immunosuppression. This agent has also been reported to stimulate macrophages to produce reactive nitrogen intermediates and superoxide anions and to promote apoptosis in the promyelocytic leukemia cell line HL-60. Check for or using this agent. ()

polyunsaturated fatty acid

A fatty acid containing more than one double bond (C=C). The essential fatty acids omega-3 and omega-6 are polyunsaturated fatty acids (PUFAs) that contain 2 or more cis double bonds. Dietary intake of some PUFAs may have beneficial effects on blood pressure, serum lipds, and inflammation. Some PUFAs, such as omega-3 PUFAs, may have antineoplastic or chemopreventive activities. Check for or using this agent. ()

polyvalent antigen-KLH conjugate vaccine

A multivalent cancer vaccine comprised of the five tumor-associated antigens (TAAs) globo H, GM2 ganglioside, Tn-MUC1, TF, and sTn conjugated with the immunoadjuvant keyhole limpet hemocyanin (KLH), with potential antineoplastic activity. Upon administration, polyvalent antigen-KLH conjugate vaccine may induce production of IgG and IgM antibodies and antibody-dependent cell-mediated cytotoxicity (ADCC) against tumor cells expressing these TAAs, resulting in tumor cell death and tumor growth inhibition. Globo H (globo H hexasaccharide 1); GM2 ganglioside; Tn-MUC1 (human tumor-associated epithelial mucin 1 carrying the tumor-specific glycan Tn); TF (Thompson-Friedreich); and sTn (sialyl-Tn) are overexpressed in a variety of cancer cells. KLH is a hapten carrier and serves as an immunostimulant to improve immune recognition of antigens. Check for or using this agent. ()

polyvalent melanoma vaccine

A cancer vaccine consisting of whole irradiated heterologous melanoma cells which express multiple melanoma-related antigens. Polyvalent melanoma vaccine may stimulate an antitumoral cytotoxic T-cell immune response in the host, resulting in inhibition of tumor cell proliferation and tumor cell death. Check for or using this agent. ()

polyvinylpyrrolidone-sodium hyaluronate gel

An oral bioadherent gel containing polyvinylpyrrolidone (PVP) and sodium hyaluronate with muco-protective activity. Upon oral application, this gel adheres to the mucosal surface of the mouth and throat, forming a thin layer that acts as a barrier to protect exposed and sensitized nerve endings from the painful stimuli associated with eating, drinking, and talking. Check for or using this agent. ()

pomalidomide

An orally bioavailable derivative of thalidomide with potential immunomodulating, antiangiogenic and antineoplastic activities. Although its exact mechanism of action has yet to be fully elucidated, pomalidomide appears to inhibit TNF-alpha production, enhance the activity of T cells and natural killer (NK) cells and enhance antibody-dependent cellular cytotoxicity (ADCC). In addition, pomalidomide may inhibit tumor angiogenesis, promote cell cycle arrest in susceptible tumor cell populations, and stimulate erythropoeisis. Check for or using this agent. ()

pomegranate juice

A natural juice isolated from the fruit of the plant Punica granatum with antioxidant, potential antineoplastic, and chemopreventive activities. Pomegranate juice contains flavonoids which promote differentiation and apoptosis in tumor cells by down-regulating vascular endothelial growth factor (VEGF) and stimulating migration inhibitory factor (MIF), thereby inhibiting angiogenesis. The flavanoids in pomegranate juice also scavenge reactive oxygen species (ROS) and, in some cell types, may prevent ROS-mediated cell injury and death. Check for or using this agent. ()

pomegranate liquid extract

A liquid extract preparation derived from pomegranate (Punica granatum) seeds with antioxidant, and potential antineoplastic and chemopreventive activities. Pomegranate liquid extract contains flavonoids which may promote differentiation and apoptosis in tumor cells by down-regulating vascular endothelial growth factor (VEGF) and stimulating migration inhibitory factor (MIF), thus inhibiting angiogenesis.Pomegranate liquid extract flavanoids also scavenge reactive oxygen species (ROS) and, in some cell types, may prevent ROS-mediated cell injury and death. Check for or using this agent. ()

pomegranate-extract pill

A pill formulation of polyphenol extracts derived from the fruit of the deciduous shrub Punica granatum with antioxidant and potential chemopreventive activities. By binding and neutralizing free-radical compounds, the polyphenol extracts contained in pomegranate-extract pill may prevent their genotoxic and carcinogenic effects. Check for or using this agent. ()

POMx

(Other name for: pomegranate-extract pill)

ponatinib hydrochloride

An orally bioavailable multitargeted receptor tyrosine kinase (RTK) inhibitor with potential antiangiogenic and antineoplastic activities. Ponatinib hydrochloride inhibits unmutated and all mutated forms of Bcr-Abl, including T315I, the highly drug therapy-resistant missense mutation of Bcr-Abl. This agent also inhibits other tyrosine kinases including those associated with vascular endothelial growth factor receptors (VEGFRs) and fibroblast growth factor receptors (FGFRs); in addition, it inhibits the tyrosine kinase receptor TIE2 and FMS-related tyrosine kinase receptor-3 (Flt3). RTK inhibition by ponatinib hydrochloride may result in the inhibition of cellular proliferation and angiogenesis and may induce cell death. Bcr-Abl is a fusion tyrosine kinase encoded by the Philadelphia chromosome. Check for or using this agent. ()

porfimer sodium

The sodium salt of a mixture of oligomers formed by ether and ester linkages of up to eight porphyrin units with photodynamic activity. Absorbed selectively by tumor cells, porfimer produces oxygen radicals after activation by 630 nm wavelength laser light, resulting in tumor cell cytotoxicity. In addition, tumor cell death may occur due to ischemic necrosis secondary to vascular occlusion that appears to be partly mediated by the release of thromboxane A2. Check for or using this agent. ()

porfiromycin

An N-methyl derivative of the antineoplastic antibiotic mitomycin C isolated from the bacterium Streptomyces ardus and other Streptomyces bacterial species. Bioreduced porfiromycin generates oxygen radicals and alkylates DNA, producing interstrand cross-links and single-strand breaks, thereby inhibiting DNA synthesis. Porfiromycin is preferentially toxic to hypoxic cells. Check for or using this agent. ()

posaconazole

A broad-spectrum, second generation, triazole compound with antifungal activity. Posaconazole strongly inhibits 14-alpha demethylase, a cytochrome P450-dependent enzyme. Inhibition of 14-alpha-demethylase prevents the conversion of lanosterol to ergosterol, an important component of the fungal cell wall. Inhibition of ergosterol synthesis changes the fungal cell membrane composition and integrity, alters membrane permeability and eventually leads to fungal cell lysis. Compared to other azole antifungals, posaconazole is a significantly more potent inhibitor of sterol 14-alpha demethylase. Check for or using this agent. ()

Posidur

(Other name for: extended release bupivacaine hydrochloride resorbable matrix formulation)

povidone-iodine

An iodophor solution containing a water-soluble complex of iodine and polyvinylpyrrolidone (PVP) with broad microbicidal activity. Free iodine, slowly liberated from the polyvinylpyrrolidone iodine (PVPI) complex in solution, kills eukaryotic or prokaryotic cells through iodination of lipids and oxidation of cytoplasmic and membrane compounds. This agent exhibits a broad range of microbicidal activity against bacteria, fungi, protozoa, and viruses. Slow release of iodine from the PVPI complex in solution minimizes iodine toxicity towards mammalian cells. Check for or using this agent. ()

povidone-iodine solution

An iodophor solution containing a water-soluble complex of iodine and polyvinylpyrrolidone (PVP) with broad microbicidal activity. Free iodine, slowly liberated from the povoiodine-iodine (PVPI) complex in solution, kills eukaryotic or prokaryotic cells through iodination of lipids and oxidation of cytosplasmic and membrane compounds. This agent exhbits a broad range of microbicidal activity against bacteria, fungi, protozoa, and viruses. Slow release of iodine from the PVPI complex in solution minimizes iodine toxicity towards mammalian cells. Check for or using this agent. ()

PP14 derivative-treated HLA-matched donor mononuclear cell-enriched leukocytes

A preparation of allogeneic HLA-matched leukocytes treated with a derivative of placental protein 14 (PP14) with potential immunomodulating activity. PP14 derivative-treated HLA-matched donor mononuclear cell-enriched leukocytes contain at least fifty-five percent early-apoptotic T cells; after infusion and when processed by recipient dendritic cells, early-apoptotic T cells may help induce a decrease in the donor effector T-cell responses against the recipient of an allogeneic hematopoietic stem cell (HSC) transplant, thereby minimizing allogeneic HSC transplant-related graft-versus-host disease (GVHD). PP14, a 162 amino acid glycosylated protein secreted by the late secretory phase endometrium, binds to T cells in a carbohydrate fashion and has been shown to induce T-cell apoptosis; maternal immune tolerance to the fetus and pregnancy-related remissions of autoimmune disease may involve PP14-induced T cell apoptosis. Check for or using this agent. ()

PPE-expressing replication-defective HSV-1 vector NP2

A replication-defective (ICP4-deleted) herpes simplex virus type 1 (HSV-1) viral vector expressing the human preproenkephalin A (PPE) gene with potential antinociceptive activity. Upon intradermal administration, PPE-expressing replication-defective HSV-1 vector NP2 is transported by retrograde axonal transport to the dorsal root ganglion (DRG) and becomes dormant. In the DRG, the vector transduces sensory neurons with high efficiency, delivering the engineered PPE gene; transduced neurons then express the protein proenkephalin A, the precursor for Met- and Leu-enkephalin. After proteolytic cleavage from proenkephalin A in the DRG neuronal cytosol, transgene-mediated Met- and Leu-enkephalin bind to mu and gamma- opioid receptors, which may result in the inhibition of nociceptive neurotransmission. Check for or using this agent. ()

PPI-2458

A synthetic derivative of fumagillin with antineoplastic and cytotoxic properties. PPI-2458 irreversibly inhibits the enzyme methionine aminopeptidase type 2 (MetAP2), thereby preventing abnormal cell growth and angiogenesis. PPI-2458 is reported to have a better toxicity profile compared to other agents of its class. Check for or using this agent. ()

PR-104

A non-toxic, small-molecule, hypoxia-activated, 3,5-dinitrobenzamide nitrogen mustard pre-prodrug with potential antitumor activity. Upon intravenous administration, PR-104 is converted by systemic phosphatases to the alcohol intermediate PR-104A, which is reduced to form the active DNA-crosslinking mustard species hydroxylamine PR-104H intracellularly under hypoxic conditions. PR-104H specifically crosslinks hypoxic tumor cell DNA, resulting in the inhibition of DNA repair and synthesis, cell-cycle arrest, and apoptosis in susceptible hypoxic tumor cell populations while sparing normoxic tissues. Check for or using this agent. ()

PR1 leukemia peptide vaccine

A cancer vaccine containing PR1, a 9 amino-acid human leukocyte antigen (HLA)-A2 restricted peptide derived from proteinase 3, with potential immunotherapeutic activity. Vaccination with PR1 leukemia peptide vaccine may stimulate the host immune system to mount a cytotoxic T lymphocyte (CTL) response against tumor cells expressing proteinase 3, resulting in tumor cell lysis. Often overexpressed in leukemic cells, proteinase 3 is a serine proteinase that activates progelatinase A and is involved in angiogenesis and metastasis. Check for or using this agent. ()

pracinostat

An orally bioavailable, small-molecule histone deacetylase (HDAC) inhibitor with potential antineoplastic activity. Pracinostat inhibits HDACs, which may result in the accumulation of highly acetylated histones, followed by the induction of chromatin remodeling; the selective transcription of tumor suppressor genes; the tumor suppressor protein-mediated inhibition of tumor cell division; and, finally, the induction of tumor cell apoptosis. This agent may possess improved metabolic, pharmacokinetic and pharmacological properties compared to other HDAC inhibitors. Check for or using this agent. ()

pralatrexate

A folate analogue inhibitor of dihydrofolate reductase (DHFR) exhibiting high affinity for reduced folate carrier-1 (RFC-1) with antineoplastic and immunosuppressive activities. Pralatrexate selectively enters cells expressing RFC-1; intracellularly, this agent is highly polyglutamylated and competes for the folate binding site of DHFR, blocking tetrahydrofolate synthesis, which may result in depletion of nucleotide precursors; inhibition of DNA, RNA and protein synthesis; and apoptotic tumor cell death. Efficient intracellular polyglutamylation of pralatrexate results in higher intracellular concentrations compared to non-polyglutamylated pralatrexate, which is more readily effuxed by the MRP (multidrug resistance protein) drug efflux pump. RFC-1, an oncofetal protein expressed at highest levels during embryonic development, may be overexpressed on the cell surfaces of various cancer cell types. Check for or using this agent. ()

prasterone

A synthetic form of dehydroepiandrosterone with potential chemopreventive activity. Produced endogenously, dehydroepiandrosterone (DHEA) is an intermediate in the conversion of cholesterol to androgens and estrogens. Although the mechanisms of action of exogenously administered DHEA have not been fully illuminated, they may result in both direct and indirect physiologic effects. Direct effects include GABA-a receptor complex and NMDA receptor modulation, and enhanced pancreatic beta cell insulin secretion and antiglucocorticoid activities. Check for or using this agent. ()

Pravachol

(Other name for: pravastatin sodium)

pravastatin sodium

The sodium salt of pravastatin with cholesterol-lowering and potential antineoplastic activities. Pravastatin competitively inhibits hepatic hydroxymethyl-glutaryl coenzyme A (HMG-CoA) reductase, the enzyme which catalyzes the conversion of HMG-CoA to mevalonate, a key step in cholesterol synthesis. This agent lowers plasma cholesterol and lipoprotein levels, and modulates immune responses by suppressing MHC II (major histocompatibility complex II) on interferon gamma-stimulated, antigen-presenting cells such as human vascular endothelial cells. In addition, pravastatin, like other statins, exhibits pro-apoptotic, growth inhibitory, and pro-differentiation activities in a variety of tumor cells; these antineoplastic activities may be due, in part, to inhibition of the isoprenylation of Ras and Rho GTPases and related signaling cascades. Check for or using this agent. ()

Precose

(Other name for: acarbose)

prednisolone

A synthetic glucocorticoid with anti-inflammatory and immunomodulating properties. After cell surface receptor attachment and cell entry, prednisolone enters the nucleus where it binds to and activates specific nuclear receptors, resulting in an altered gene expression and inhibition of proinflammatory cytokine production. This agent also decreases the number of circulating lymphocytes, induces cell differentiation, and stimulates apoptosis in sensitive tumor cells populations. Check for or using this agent. ()

prednisone

A synthetic glucocorticoid with anti-inflammatory and immunomodulating properties. After cell surface receptor attachment and cell entry, prednisone enters the nucleus where it binds to and activates specific nuclear receptors, resulting in an altered gene expression and inhibition of proinflammatory cytokine production. This agent also decreases the number of circulating lymphocytes, induces cell differentiation, and stimulates apoptosis in sensitive tumor cell populations. Check for or using this agent. ()

pregabalin

A 3-isobutyl derivative of gamma-amino butyric acid (GABA) with anti-convulsant, anti-epileptic, anxiolytic, and analgesic activities. Although the exact mechanism of action is unknown, pregabalin selectively binds to alpha2delta (A2D) subunits of presynaptic voltage-dependent calcium channels (VDCCs) located in the central nervous system (CNS). Binding of pregabalin to VDCC A2D subunits prevents calcium influx and the subsequent calcium-dependent release of various neurotransmitters, including glutamate, norepinephrine, serotonin, dopamine, and substance P, from the presynaptic nerve terminals of hyperexcited neurons; synaptic transmission is inhibited and neuronal excitability is diminished. Pregabalin does not bind directly to GABA-A or GABA-B receptors and does not alter GABA uptake or degradation. Check for or using this agent. ()

Pregnyl

(Other name for: recombinant human chorionic gonadotropin)

preimplantation factor PIF-1

A synthetic version, known as PIF-1, of the peptide preimplantation factor (PIF), an embryo-secreted peptide, with potential activity against graft-versus-host disease (GVHD). PIF-1 is believed to have wide-ranging activity on the immunologic system, including a whole host of immunologic changes that resemble pregnancy, in which there is neither graft-versus-host or host-versus-graft disease between the mother and the embryo. Replication of the immunologic profile of pregnancy through the administration of PIF-1 may thus benefit patients undergoing bone marrow transplant (BMT) who experience graft-versus-host disease (GVHD). Native embryonic PIF has been found to have a multi-targeted effect on various aspects of the immune system, coordinated so that there is a successful embryonic implantation and a successful pregnancy. Check for or using this agent. ()

Prelay

(Other name for: troglitazone)

Prelone

(Other name for: prednisolone)

Premarin

(Other name for: conjugated estrogens)

Prevnar

(Other name for: pneumococcal 7-valent conjugate vaccine)

Prialt

(Other name for: ziconotide)

Prilosec

(Other name for: omeprazole)

primary prostate cancer tissue/hTERT/survivin mRNA-loaded autologous dendritic cell vaccine

An autologous dendritic cell (DCs) vaccine targeting prostate cancer with immunostimulating activity. The autologous DC vaccine is prepared via transfecting DCs with mRNAs extracted from primary prostate cancer tissue, and mRNAs of human telomerase reverse transcriptase (hTERT) and survivin. Upon administration, this DC vaccine may elicit a potent cytotoxic T-cell (CTL) response against prostate cancer cells, resulting in tumor cell death. Both hTERT and survivin are essential in neoplastic growth, and are considered to be universal tumor antigens. Check for or using this agent. ()

Prinivil

(Other name for: lisinopril)

prinomastat

A synthetic hydroxamic acid derivative with potential antineoplastic activity. Prinomastat inhibits matrix metalloproteinases (MMPs) (specifically, MMP-2, 9, 13, and 14), thereby inducing extracellular matrix degradation, and inhibiting angiogenesis, tumor growth and invasion, and metastasis. As a lipophilic agent, prinomastat crosses the blood-brain barrier. Check for or using this agent. ()

probenecid

A benzoic acid derivative with antihyperuricemic property. Probenecid competitively inhibits the active reabsorption of urate at the proximal tubule in the kidney thereby increasing urinary excretion of uric acid and lowering serum urate concentrations. This prevents urate deposition and promotes resolution of existing urate deposits. In addition, probenecid modulates the transport of organic acids and acidic drugs at the proximal and distal renal tubule, thereby increasing the drug serum concentration. Check for or using this agent. ()

procarbazine hydrochloride

The hydrochloride salt of a methylhydrazine derivative with antineoplastic and mutagenic activities. Although the exact mode of cytotoxicity has not been elucidated, procarbazine, after metabolic activation, appears to inhibit the trans-methylation of methionine into transfer RNA (t-RNA), thereby preventing protein synthesis and consequently DNA and RNA synthesis. This agent may also undergo auto-oxidation, resulting in the formation of cytotoxic free radicals which damage DNA through an alkylation reaction. Check for or using this agent. ()

prochlorperazine

A synthetic propylpiperazine derivative of phenothiazine with antiemetic, antipsychotic, antihistaminic, and anticholinergic activities. Prochlorperazine antagonizes the dopamine D2-receptor in the chemoreceptor trigger zone (CTZ) of the brain and may prevent chemotherapy-induced emesis. Check for or using this agent. ()

Prochymal

(Other name for: remestemcel-L)

Procrit

(Other name for: epoetin alfa)

Proctocort

(Other name for: therapeutic hydrocortisone)

Profasi

(Other name for: recombinant human chorionic gonadotropin)

progenipoietin

A recombinant, chimeric, dual-receptor agonist fusion protein with immunohematopoietic activity. Progenipoietin (ProGP) consists of portions of the ligands for granulocyte colony-stimulating factor (G-CSF) and human fetal liver tyrosine kinase-3 (FLT3); variants progenipoietin-1, 2 and 3 differ in the orientation of the two receptor agonists. ProGP binds simultaneously to G-CSF and FLT3 receptors with receptor affinities approximately two- to three-fold higher than the respective native ligands. When administered in vivo, this agent may augment the number of circulating granulocytes and dendritic cells (DCs). ProGP may promote the proliferation of and prevent apoptosis in several human hematopoietic cell lineages, exhibiting the additive activities of a combination of C-GSF and FLT3. Check for or using this agent. ()

progesterone vaginal insert

A tablet preparation formulated for vaginal administration containing a micronized synthetic form of the endogenous steroid hormone progesterone with progesterone activity. Upon vaginal insertion, progesterone binds to the progesterone receptor, resulting in dissociation of heat shock proteins, receptor phosphorylation, and transcription activation through direct or indirect interaction with transcription factors. This agent exerts inhibitory effects on estrogen by decreasing the number of estrogen receptors and increasing its metabolism to inactive metabolites. Progesterone induces secretory changes in the endometrium, decreases uterine contractility during pregnancy, and maintains pregnancy. Check for or using this agent. ()

Progestin

(Other name for: therapeutic progesterone)

Proglycem

(Other name for: diazoxide)

Prograf

(Other name for: tacrolimus)

prohibitin-targeting peptide 1

A chimeric, 25-mer peptide that targets prohibitin, with potential antineoplastic activity. Prohibitin-targeting peptide 1 (prohibitin-TP01) consists of a fat-targeting motif (CKGGRAKDC), two repeats of a proapoptotic peptide motif (KLAKLAK) and a GG linker. This peptide binds specifically to prohibitin in the white adipose vasculature; upon receptor-mediated cell internalization, the ligand/receptor complex triggers apoptosis and results in ablation of white fat. Destruction of white fat may potentially have positive consequences for men with prostate cancer since a high level of white fat has been implicated as a critical contributing factor in poor prostate cancer outcome. Prohibitin, a multifunctional membrane-associated protein that is thought to regulate cell survival and growth, has been shown by immunohistochemical analysis to be expressed in the membrane of endothelial cells in white adipose tissue. Check for or using this agent. ()

Prokine

(Other name for: sargramostim)

Prolarix

(Other name for: caricotamide/tretazicar)

Prolastin-C

(Other name for: alpha-1-proteinase inhibitor human)

Proleukin

(Other name for: aldesleukin)

Prolia

(Other name for: denosumab)

Prolixin

(Other name for: fluphenazine hydrochloride)

Prolutin

(Other name for: therapeutic progesterone)

Promacta

(Other name for: eltrombopag olamine)

promethazine hydrochloride

The hydrochloride salt form of promethazine, a phenothiazine derivative with antihistaminic, sedative and antiemetic properties. Promethazine hydrochloride selectively blocks peripheral H1 receptors thereby diminishing the effects of histamine on effector cells. Promethazine hydrochloride also blocks the central histaminergic receptors, thereby depressing the reticular system causing sedative and hypnotic effects. In addition, promethazine hydrochloride also has centrally acting anticholinergic properties and probably mediates nausea and vomiting by acting on the medullary chemoreceptive trigger zone. Check for or using this agent. ()

Promycin

(Other name for: porfiromycin)

propofol

A hypnotic alkylphenol derivative. Formulated for intravenous induction of sedation and hypnosis during anesthesia, propofol facilitates inhibitory neurotransmission mediated by gamma-aminobutyric acid (GABA). This agent is associated with minimal respiratory depression and has a short half-life with a duration of action of 2 to 10 minutes. Check for or using this agent. ()

propranolol hydrochloride

The hydrochloride salt of propranolol, a synthetic beta-adrenergic receptor blocker with antianginal, antiarrhythmic, and antihypertensive properties. Propranolol competitively antagonizes beta-adrenergic receptors, thereby inhibiting beta-adrenergic reactions, such as vasodilation, and negative chronotropic and inotropic effects. Check for or using this agent. ()

propylthiouracil

A thiourea derivative with antithyroid property. Propylthiouracil (PTU) interferes with the oxidation of iodine possibly by interaction with peroxidase or a peroxidase-mediated complex reaction, thereby inhibiting synthesis of thyroid hormones tri-iodothyronine (T3) and thyroxine (T4). In addition, this agent inhibits the Type I 5'-deiodinase (D1), an enzyme involved in the peripheral conversion of thyroxine to tri-iodothyronine. This results in decreased plasma triodothyronine concentrations and decreased entrance of thyroxine into cells thereby reducing thyroid hormone activity. Check for or using this agent. ()

Proscar

(Other name for: finasteride)

prostate cancer vaccine ONY-P1

A cell-based vaccine derived from prostate cancer with potential immunopotentiating and antineoplastic activities. Prostate cancer vaccine ONY-P1 is derived from three irradiated allogeneic prostate cancer cell lines that represent different stages of prostate cancer and express a broad range of prostate and prostate cancer antigens. Upon administration, this vaccine may stimulate a host immune response against prostate cancer cells; in the vaccination schedule, the first two vaccinations are co-administered with bacillus Calmette-Guerin (BCG) as an adjuvant. Check for or using this agent. ()

Prostate Health Cocktail

(Other name for: cholecalciferol/d-alpha tocopherol/L-selenomethionine/green tea extract/saw palmetto berry extract/daidzein/genistein/lycopene prostate health supplement)

prostatic acid phosphatase-sargramostim fusion protein

A genetically-engineered protein formed by the fusion of prostatic acid phosphatase (PAP) and sargramostim (GM-CSF). Vaccination with antigen-presenting cells (APC) loaded with prostatic acid phosphatase-sargramostim fusion protein may elicit a cytotoxic T-cell response against tumor cells that express PAP. Check for or using this agent. ()

protein stabilized liposomal docetaxel nanoparticles

A formulation containing protein-stabilized liposome nanoparticles encapsulating the poorly water-soluble, second-generation taxane analog docetaxel with antineoplastic activity. Docetaxel binds to and stabilizes the beta-tubulin subunit, thereby inhibiting microtubule disassembly which results in cell-cycle arrest at the G2/M phase and cell death. This agent also inhibits pro-angiogenic factors such as vascular endothelial growth factor (VEGF) and displays immunomodulatory and pro-inflammatory properties by inducing various mediators of the inflammatory response. Compared to the use of toxic carriers to increase solubilization of docetaxel, protein-stabilized liposomal docetaxel improves drug solubility while avoiding carrier-associated toxicity. Check for or using this agent. ()

proteolytic enzymes

Enzymes produced and secreted by the pancreas which aid in the proteolysis of proteins in the digestive tract. Pancreatic proteolytic enzymes include trypsin, chymotrypsin and carboxypeptidase; these enzymes are secreted as zymogens, inactive precursors of the enzymes, and are activated in the lumen of the digestive canal. Another proteolytic enzyme, enteropeptidase, is associated with the brush border of enterocytes; this enzyme catalyses the conversion of trypsinogen into trypsin which, in turn, can activate a number of other pancreatic zymogens. Check for or using this agent. ()

Protopic

(Other name for: tacrolimus)

Provecta

(Other name for: PV-10)

Provenge

(Other name for: sipuleucel-T)

Proventil

(Other name for: albuterol sulfate)

Provera

(Other name for: medroxyprogesterone)

Provera Dosepak

(Other name for: medroxyprogesterone)

Provigan

(Other name for: promethazine hydrochloride)

Provigil

(Other name for: modafinil)

PRX302

A targeted prodrug consisting of a recombinant modified form of the Aeromonas protoxin proaerolysin (PA), bearing a prostate-specific protease cleavage site, with potential antineoplastic activity. When injected directly into the prostate, PRX302 is hydrolyzed to the active toxin aerolysin by the serine protease prostate specific antigen (PSA), a protein overexpressed by prostate cancers and prostate cells in hyperplastic prostatic tissue. Aaerolysin molecules then oligomerize to form ring-like heptamers that are incorporated into the lipid bilayers of cell membranes, forming large membrane channels and resulting in the leakage of cellular contents and lysis of PSA-expressing prostate cells. Check for or using this agent. ()

PSA prostate cancer vaccine

A peptide vaccine containing the prostate specific antigen (PSA) with potential antineoplastic activity. PSA, a glycoprotein secreted by prostatic epithelial and ductal cells, is overexpressed in prostate cancer cells and is used as a tumor marker for both diagnosis and treatment evaluation. Vaccination with PSA peptide vaccine may produce anti-PSA antibodies as well as elicit a cytotoxic T-cell (CTL) response against prostate cancer cells expressing this antigen, thereby decreasing tumor cell growth. Check for or using this agent. ()

PSA RNA-pulsed dendritic cell vaccine

An autologous dendritic cell vaccine with potential immunostimulatory activity. Dendritic cells harvested from a prostate cancer patient are transfected with the mRNA encoding for prostate specific antigen (PSA), a tumor marker secreted by prostatic epithelial and ductal cells. When reintroduced back to the patient, these PSA RNA pulsed autologous dendritic cells may elicit a cytotoxic T-cell (CTL) response against PSA-positive prostate cancer cells. Check for or using this agent. ()

PSA-PAP/KLH-pulsed autologous dendritic cell vaccine

A cell-based cancer vaccine composed of autologous dendritic cells (DCs) pulsed with the prostate-specific tumor associated antigens (TAAs) prostate specific antigen (PSA) and prostate acid phosphatase (PAP), and conjugated to the immunostimulant keyhole limpet hemocyanin (KLH), with potential immunostimulatory and antineoplastic activities. Upon administration, prostate cancer antigen/KLH-pulsed autologous dendritic cell vaccine may stimulate the immune system to mount anti-tumoral cytotoxic T lymphocyte (CTL) and antibody responses against prostate cancer cells expressing PSA and PAP, which may result in prostate cancer cell lysis. KLH is an immunogenic carrier and serves as an immunostimulant to improve antigenic immune recognition and T-cell responses and can be used to evaluate vaccine efficacy. Check for or using this agent. ()

PSA:154-163(155L) peptide vaccine

A cancer vaccine comprised of a synthetic peptide with an amino acid sequence corresponding to positions 154-163 of the amino acid sequence for prostate-specific antigen (PSA) with a leucine substitution at position 155. Upon administration, PSA:154-163(155L) peptide vaccine may elicit a cytotoxic T-cell response against tumor cells that express PSA. Check for or using this agent. ()

Pseudomonas aeruginosa preparation

A preparation containing the inactivated Pseudomonas aeruginosa bacterium with potential immunomodulating activity. Upon inoculation, Pseudomonas aeruginosa preparation may stimulate the immune system, increasing macrophage and natural killer cell activity; it may be used thereby in cancer adjuvant treatments, and it may reduce the incidence of infection. Check for or using this agent. ()

psilocybine

A tryptamine alkaloid, isolated from various genera of fungi including the genus Psilocybe, with hallucinogenic, anxiolytic, and psychoactive activities. In vivo, psilocybine is rapidly dephosphorylated into the active compound psilocin, which activates serotonin 2A (5-HT2A) receptors in the central nervous system (CNS), mimicking the effects of serotonin. Check for or using this agent. ()

PSMA-targeted docetaxel nanoparticles BIND-014

A proprietary preparation of polymeric nanoparticles containing the second-generation taxane docetaxel, targeted to prostate-specific membrane antigen (PSMA), with antineoplastic activity. PSMA-targeted docetaxel nanoparticles BIND-014 carry docetaxel within a matrix of polylactic acid covered with a coating of polyethylene glycol; embedded on the surface of the polyethylene glycol coating are ligands targeted to PSMA. BIND-014 allows gradual release of docetaxel upon degradation of the polylactic acid, and the PEG encapsulation escapes the host immune response while PSMA ligands on the surface restrict the cytotoxic effect to PSMA-expressing cells. Docetaxel binds to and stabilizes the beta-tubulin subunit, thereby inhibiting microtubule disassembly which results in cell-cycle arrest at the G2/M phase and cell death. PSMA is a cell-surface antigen that is abundantly present on the surface of cancer cells and on the neovasculature that feeds a wide variety of tumor types. Check for or using this agent. ()

PSMA/TARP peptide vaccine

A peptide-based cancer vaccine containing epitopes of T cell receptor gamma-chain alternate reading frame protein (TARP) and prostate-specific membrane antigen (PSMA) in combination with a Poly IC-LC immunoadjuvant, with potential antineoplastic activity. Upon administration, PSMA/TARP peptide vaccine may stimulate a host cytotoxic T-cell (CTL) response against TARP- and PSMA-expressing tumor cells, resulting in tumor cell cytotoxicity. The nuclear protein TARP and PSMA are commonly expressed in prostate cancer cells. Check for or using this agent. ()

pTVG-HP plasmid DNA vaccine

A cancer vaccine containing plasmid DNA encoding human prostatic acid phosphatase (PAP) (pTVG-HP) with potential immunostimulatory and antineoplastic activities. Upon administration, pTVG-HP plasmid DNA vaccine may stimulate the host immune system to generate a cytotoxic T lymphocyte (CTL) response against PAP-expressing prostate cancer cells. PAP or prostatic specific acid phosphatase (PSAP) is a tumor associated antigen (TAA) that may be overexpressed in prostate cancer. Check for or using this agent. ()

Pulmozyme

(Other name for: dornase alfa inhalation solution)

pUMVC3-hIGFBP-2 multi-epitope plasmid DNA vaccine

A plasmid DNA vaccine containing mammalian expression vector pUMVC3, encoding epitopes of human insulin-like growth factor-binding protein 2 (hIGFBP-2) with potential immunostimulating and antineoplastic activities. Upon vaccination, pUMVC3-hIGFBP-2 multi-epitope plasmid DNA vaccine may activate the immune system to mount a cytotoxic T-lymphocyte (CTL) response against hIGFBP-2-expressing cells. The tumor associated antigen (TAA) hIGFBP-2, a member of the insulin like growth factor receptor family, is overexpressed in a number of cancer cell types and its expression has been associated with increased invasiveness. Check for or using this agent. ()

Purinethol

(Other name for: mercaptopurine)

Purlytin

(Other name for: rostaporfin)

purple grape juice

Juice made form dark, purple grapes that contain polyphenols with antioxidant and potential cardiovascular protecting activities. Purple grape juice contains high amounts of flavonoids that may increase antioxidant activity and reduce oxidative stress, reduce low-density lipoprotein (LDL), and improve nitric oxide formation, endothelial function and vasodilation. Check for or using this agent. ()

PV-10

An injectable ten percent solution of rose bengal disodium, an iodinated fluorescein derivative, with potential antineoplastic and radiosensitizing activities. When injected into tumor tissue, PV-10 specifically targets and concentrates in tumor cells, producing cytotoxic singlet oxygen when exposed to ionizing radiation. In addition, PV-10 may stimulate an anti-tumor immune response. Check for or using this agent. ()

PV701

An attenuated, replication-competent, oncolytic strain of Newcastle disease virus. PV701 selectively lyses tumor cells. The selectivity of this agent is related to defects in the interferon-mediated antiviral response found in tumor cells. Check for or using this agent. ()

PVA microporous hydrospheres

An embolic material composed of microspheres of polyvinyl alcohol (PVA) polymers. These water-soluble, compressible microspheres may be used to encapsulate various therapeutic agents; drug-loaded microspheres can then be used as a drug delivery vehicle during embolization of tumor vasculature. Check for or using this agent. ()

PVA microporous hydrospheres/doxorubicin hydrochloride

An embolic material composed of microspheres of polyvinyl alcohol (PVA) polymers loaded with doxorubicin hydrochloride with antineoplastic activity. Doxorubicin hydrochloride-loaded microspheres may be used as a drug delivery vehicle during embolization of tumor vasculature. Doxorubicin intercalates DNA, interferes with catalytic activity of topoisomerase II, and causes DNA adducts and other DNA damage, resulting in tumor cell growth inhibition and apoptosis. When used in tumor vasculature embolization, this preparation may provide more tumor-specific treatment with doxorubicin compared to the systemic administration of doxorubicin, thereby reducing the systemic toxicity of doxorubicin. Check for or using this agent. ()

pVAXrcPSAv53l vaccine

A cancer vaccine containing xenogenic DNA from rhesus macaque (Macaca mulatta) that encodes prostate specific antigen (PSA) with potential immunostimulating and antineoplastic activities. Upon repeated intradermal administration via electroporation, pVAXrcPSAv53l vaccine may induce a cytotoxic T-lymphocyte (CTL) response against PSA-expressing prostate cancer cells. Rhesus PSA is 89% homologous to human PSA. Check for or using this agent. ()

PVDF/sirolimus topical

A topical formulation consisting of a polyvinylidene fluoride (PVDF) polymer resin containing the macrolide sirolimus (rapamycin), produced by the organism Streptomyces hygroscopicus, with immunosuppressive activity. Upon application of topical PVDF/sirolimus, sirolimus migrates from the PVDF polymer resin into the skin. Once inside cells, sirolimus binds to the immunophilin FK binding protein-12 (FKBP-12) and forms a sirolimus:FKBP-12 complex. This complex binds to and inhibits the activity of the serine/threonine kinase mammalian target of rapamycin (mTOR), which may result in the suppression of cytokine-driven T-cell activation and proliferation. Check for or using this agent. ()

pyrazinamide

A synthetic pyrazinoic acid amide derivative with bactericidal property. Pyrazinamide is particularly active against slowly multiplying intracellular bacilli (unaffected by other drugs) by an unknown mechanism of action. Its bactericidal action is dependent upon the presence of bacterial pyrazinamidase, which removes the amide group to produce active pyrazinoic acid. Pyrazinamide is an important component of multidrug therapy for tuberculosis. Check for or using this agent. ()

pyrazine diazohydroxide

A congener of pyridine 2-diazohydroxide. Pyrazine diazohydroxide forms DNA adducts via the reactive pyrazine diazonium ion, thereby inhibiting DNA synthesis. Check for or using this agent. ()

pyrazofurin

A nucleoside analog. Pyrazofurin potently inhibits orotidine 5'-monophosphate (OMP) decarboxylase, thereby interfering with de novo synthesis of uridine nucleotides and resulting in cytotoxicity. This agent also causes a rapid depletion of the pyrimidine deoxynucleotide pool, thereby inhibiting DNA synthesis and cell replication. Check for or using this agent. ()

pyrazoloacridine

A 9-methoxy acridine compound containing a reducible 5-nitro substituent. Pyrazoloacridine appears to intercalate into DNA and inhibit RNA synthesis, DNA synthesis, and the activities of topoisomerases I and II, thereby causing cytotoxicity. Check for or using this agent. ()

pyridoxine hydrochloride

The hydrochloride salt of pyridoxine, a water-soluble B vitamin. Pyridoxine is converted in the liver into the metabolically active coenzyme form pyridoxal 5'-phosphate (P5P), an essential cofactor in many enzymatic reactions in amino acid metabolism, including transamination, deamination, and decarboxylation. P5P is required for glycogenolysis and the synthesis of sphingolipids and is essential to red blood cell, nervous system, and immune system functions. Check for or using this agent. ()

pyrimethamine

A synthetic derivative of ethyl-pyrimidine with potent antimalarial properties. Pyrimethamine is a competitive inhibitor of dihydrofolate reductase (DHFR). DHFR is a key enzyme in the redox cycle for production of tetrahydrofolate, a cofactor that is required for the synthesis of DNA and proteins. This agent is often used in combination with other antimalarials for the treatment of uncomplicated falciparum malaria. Check for or using this agent. ()

pyroxamide

A synthetic derivative of hydroxamic acid with antineoplastic properties, Pyroxamide inhibits histone deacetylases involved in transcription; induces hyperacetylation of core histones, modulating chromatin structure and affecting transcription of some genes that inhibit tumor growth; and induces growth arrest and apoptosis. Pyroxamide is used in clinical studies for cancer chemotherapy. Check for or using this agent. ()

pyruvate kinase inhibitor TLN-232

A synthetic cyclic heptapeptide with potential antineoplastic activity. Pyruvate kinase (PK) inhibitor TLN-232 targets pyruvate kinase M2 (M2PK), which may disrupt tumor cell anaerobic glycolysis. M2PK is a dimeric isoform of PK and the predominant PK isoform found in tumor cells. Check for or using this agent. ()

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