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• Cancer Drugs

- S -

• S-1

An oral fluoropyrimidine antagonist composed of tegafur combined with two modulators of 5-flurouracil (5-FU) activity, 5-chloro-2,4-dihydroxypyridine (CDHP) and potassium oxonate, in a molar ratio of 1:0.4:1. Tegafur is a prodrug of 5-fluorouracil, an antimetabolite that inhibits thymidylate synthase, thereby inhibiting DNA synthesis and cell division, and competes with uridine triphosphate, thus inhibiting RNA and protein synthesis. CDHP is a reversible inhibitor of dihydropyrimidine dehydrogenase (DPD), the liver enzyme responsible for rapid catabolism of 5-FU into inactive metabolites. Potassium oxonate preferentially localizes in the gut and inhibits the enzyme orotate phosphoribosyltransferase (the major enzyme responsible for 5-FU activation), thereby decreasing activation of 5-FU in the gut and activated 5-FU-related gastrointestinal toxicity.



• Safingol

(Other name for: L-threo-dihydrosphingosine)



• Salagen

(Other name for: pilocarpine hydrochloride)



• samarium Sm 153 lexidronam pentasodium

The pentasodium salt of samarium Sm 135 lexidronam, a therapeutic agent consisting of a medium energy beta- and gamma-emitting radioisotope, samarium Sm 135, and a teraphosphonate chelator, ethylenediaminetetramethylene phosphonic acid (EDTMP). The chelator moiety of samarium Sm 153 lexidronam associates with hydroxyapatite crystals concentrated in areas of bone turnover, thereby selectively delivering samarium Sm 153-mediated cytotoxic radiation to osteoblastic bone metastases.



• Sandimmune

(Other name for: cyclosporine)



• Sandoglobulin

(Other name for: immune globulin)



• Sandostatin Lar Depot

(Other name for: octreotide acetate)



• SangCya

(Other name for: cyclosporine)



• saponin-cholesterol-phospholipid adjuvant

An adjuvant comprised of saponin, derived from the bark of Quillaia saponaria Molina, cholesterol and phospholipid with antigen-delivery and immunostimulatory activities. This saponin-based adjuvant in combination with various antigens, including those for human papilloma virus (HPV), hepatitis C virus (HCV), and the human cancer antigen NY-ESO-1, may result in potent antibody, CD4+ T-helper-cell, and CD8+ cytotoxic T-cell responses against the targeted antigen. In addition, this agent may reduce the amount of antigen necessary to induce an efficient immune response in the host.



• Sarasar

(Other name for: lonafarnib)



• SarCNU

An alkylating chloroethylnitrosourea with antineoplastic activity. Selectively accumulating in some tumor cells, SarCNU forms covalent linkages with nucleophilic centers in DNA, causing depurination, base pair miscoding, strand scission, and DNA-DNA cross-linking, which may result in cytotoxicity.



• sargramostim

A recombinant therapeutic agent which is chemically identical to or similar to endogenous human GM-CSF. Binding to specific cell surface receptors, sargramostim modulates the proliferation and differentiation of a variety of hematopoietic progenitor cells with some specificity towards stimulation of leukocyte production and may reverse treatment-induced neutropenias. This agent also promotes antigen presentation, up-regulates antibody-dependent cellular cytotoxicity (ADCC), and increases interleukin-2-mediated lymphokine-activated killer cell function; it may also augment host antitumoral immunity.



• sargramostim plasmid DNA hepatocellular carcinoma vaccine adjuvant

A vaccine adjuvant consisting of a plasmid DNA encoding sargramostim (granulocyte-macrophage colony-stimulating factor). Upon administration, expressed sargramostim may stimulate a cytotoxic T cell response enhancing the host immune response to a concomitantly administered hepatocellular carcinoma vaccine.



• sargramostim plasmid DNA melanoma vaccine adjuvant

A vaccine adjuvant consisting of a plasmid DNA encoding sargramostim (a granulocyte macrophage-colony stimulating factor). Upon administration, expressed sargramostim may stimulate a cytotoxic T cell response enhancing the host immune response to a concomitantly administered melanoma vaccine.



• satraplatin

An orally administered third generation platinum compound with potential antineoplastic activity. Satraplatin forms highly reactive, charged, platinum complexes which bind to nucleophilic groups in DNA, inducing intrastrand and interstrand DNA cross-links, as well as DNA-protein cross-links. These cross-links result in cell growth inhibition and apoptosis.



• Satric

(Other name for: metronidazole)



• SB-743921

A synthetic small molecule with potential antineoplastic properties. SB-743921 selectively inhibits kinesin spindle protein (KSP), an important protein involved in the early stages of mitosis that is expressed in proliferating cells. Inhibition of KSP results in inhibition of mitotic spindle assembly and interrupts cell division, thereby causing cell cycle arrest and induction of apoptosis.



• SB-AS02B adjuvant

A proprietary oil-in-water emulsion specifically designed for combining protein preparations used in vaccines. SB-AS02B adjuvant contains monophosphoryl lipid A and QS21, a saponin extracted from the South American tree Quillaja saponaria Molina. This agent may be used for formulating cancer-specific vaccine preparations such as those containing MAGE-3 melanoma protein.



• SB-AS15 adjuvant

A vaccine adjuvant containing CpG 7909, monophosphoryl lipid, and QS-21 with potential antineoplastic and immunostimulatory activities. CpG 7909 is a synthetic 24-mer oligonucleotide containing 3 CpG motifs that selectively targets Toll-like receptor 9 (TLR9), thereby activating dendritic and B cells and stimulating cytotoxic T cell and antibody responses against tumor cells bearing tumor antigens. Monophosphoryl lipid is a detoxified derivative of lipid A, a component of Salmonella minnesota lipopolysaccharide (LPS); this agent may enhance humoral and cellular responses to various antigens. QS-21 is a purified, naturally occurring saponin derived from the South American tree Quillaja saponaria Molina and exhibits various immunostimulatory activities. Combinations of monophosphoryl lipid and QS-21 may be synergistic in inducing humoral and cellular immune responses.



• SCH-58500

A genetically-engineered adenovirus that contains the gene that encodes the human tumor-suppressor protein p53. This viral vector delivers p53 into tumor cells in order to initiate p53-dependent apoptosis and p53-induced cell cycle arrest.



• Sclerosol Intrapleural Aerosol

(Other name for: talc)



• selenium

A nonmetallic chemical element found in trace amounts in human body. Selenium primarily occurs in vivo as selenocompounds, mostly selenoproteins such as glutathione peroxidase and thioredoxin reductase (enzymes responsible for detoxification). Alone or in combination with Vitamin E, selenocompounds act as antioxidants. These agents scavenge free radicals; prevent blood clots by inhibiting platelet aggregation; strengthen the immune system; and have been shown, in some instances, to inhibit chromosomal damage and mutations. Exhibiting chemopreventive activity, selenocompounds also inhibit the induction of protein kinase C.



• semustine

A methylated derivative of carmustine with antineoplastic activity. As an alkylating agent, semustine forms covalent linkages with nucleophilic centers in DNA, causing depurination, base-pair miscoding, strand scission, and DNA-DNA cross-linking, which may result in cytotoxicity.



• senna extract

An extract made from the dried leaflets on the pods of Cassia angustifolia or Cassia acutifolia with laxative properties. Dimeric glycosides in dried senna extract are converted to the active monoanthrones by bacterial action in the colon. Through direct effects on enterocytes, enteric neurons, and muscle, monoanthrones produce giant migrating colonic contractions in addition to water and electrolyte secretion. As do other stimulant laxatives, monoanthrones may induce a limited low-grade inflammation in the colon through activation of prostaglandin/cyclic AMP and nitric oxide/cyclic GMP pathways and perhaps inhibition of Na+, K+-ATPase.



• Sensorcaine-MPF

(Other name for: bupivacaine hydrochloride)



• Septra

(Other name for: trimethoprim-sulfamethoxazole)



• Seromycin

(Other name for: D-cycloserine)



• sertraline

The salt form of a synthetic derivative of naphthalenamine with anti-serotoninergic and anti-depressant properties. Sertraline appears to selectively inhibit the neuronal uptake of serotonin, raising serotonin levels in the CNS.



• SGN-00101

A recombinant chimeric protein composed of the heat shock protein 65 (Hsp65) from Mycobacterium bovis, and the human papilloma viral (HPV) protein E7. Hsp65, similar to other members of its family of proteins, elicits a strong immune response and may be used to design vaccines against a number of different cancers. E7 protein is involved in carcinogenesis of anal and cervical tumors, and represents a tumor antigen that may be specifically targeted by lymphocytes.



• shark cartilage

A nutritional supplement gleaned from the exoskeleton of the shark. Shark cartilage inhibits metalloproteinases (MMPs) and possesses antiangiogenic and antimetastatic properties.



• shark cartilage extract AE-941

A multifunctional antiangiogenic agent derived from shark cartilage with potential antineoplastic activity. Shark cartilage extract AE-941 competitively inhibits the binding of pro-angiogenic vascular endothelial growth factor (VEGF) to its cell receptor, thereby inhibiting endothelial cell proliferation. This agent also inhibits matrix metalloproteinases (MMPs), stimulates tissue plasminogen activator (tPA), and activates caspase-mediated apoptotic pathways in endothelial cells.



• sildenafil

The citrate salt of a pyrazolopyrimidinone derivative structurally related to zaprinast. Sildenafil selectively inhibits cyclic guanosine monophosphate (cGMP)-specific type 5 phosphodiesterase, resulting in vasodilation in the corpus cavernosum of the penis and penile erection.



• silicon phthalocyanine 4

A synthetic photosensitizer agent containing a large macrocyclic ring chelated with silicon. Silicon phthalocyanine 4 localizes primarily in mitochondrial cytosolic membranes and, after photoexcitation, forms reactive oxygen species that induce apoptosis.



• silymarin

A mixture of flavonolignans isolated from the milk thistle plant Silybum marianum. Silymarin may act as an antioxidant, protecting hepatic cells from chemotherapy-related free radical damage. This agent may also promote the growth of new hepatic cells.



• Simulect

(Other name for: basiliximab)



• simvastatin

A lipid-lowering agent derived synthetically from a fermentation product of the fungus Aspergillus terreus. Hydrolyzed in vivo to an active metabolite, simvastatin 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.



• siplizumab

A monoclonal immunoglobulin G1 antibody with potential antineoplastic activity. Siplizumab binds to CD2, a specific receptor found in T cells and NK cells, thereby triggering a host immune response that results in lysis of CD2+ cells, selective suppression of the immune system, and control of activated T cell growth.



• sirolimus

A natural macrocyclic lactone produced by the bacterium Streptomyces hygroscopicus, with immunosuppressant properties. In cells, sirolimus binds to the immunophilin FK Binding Protein-12 (FKBP-12) to generate an immunosuppressive complex that binds to and inhibits the activation of the mammalian Target Of Rapamycin (mTOR), a key regulatory kinase. This results in inhibition of T lymphocyte activation and proliferation that occurs in response to antigenic and cytokine (IL-2, IL-4, and IL-15) stimulation and inhibition of antibody production.



• SJG-136

A pyrrolobenzodiazepine dimer with potential antineoplastic activity. SJG-136 binds to the minor groove of DNA and induces interstrand cross-links between two N-2 guanine positions, thereby inhibiting DNA replication and transcription. With a preference for binding to purine-GATC-pyrimidine sequences, SJG-136 adducts do not appear to be subject to p53-mediated DNA excision repair mechanisms.



• Sk-Dexamethasone

(Other name for: dexamethasone)



• Sk-Prednisone

(Other name for: prednisone)



• SL-11047

A second generation polyamine analog synthesized through the restriction of molecular conformations of parent polyamine compounds with potential antineoplastic activity. SL-11047 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.



• soblidotin

A dolastatin-10 derivative. Soblidotin inhibits tubulin polymerization, resulting in cell cycle arrest and induction of apoptosis.



• sodium borocaptate

A boron-carrying compound. After parenteral administration, borocaptate sodium accumulates preferentially in tumor cells. When exposed to neutron irradiation, borocaptate absorbs neutrons and self-destructs releasing short-range alpha radiation and 'recoil' lithium in tumor cells, resulting in alpha radiation-induced tumor cell death. This highly selective, localized radiotargeting of tumor cells, known as boron neutron capture therapy (BNCT), spares adjacent normal tissues.



• sodium salicylate

The sodium salt of salicylic acid. As a nonsteroidal anti-inflammatory drug (NSAID), sodium salicylate irreversibly acetylates cyclooxygenases I and II, thereby inhibiting prostaglandin synthesis and associated inflammation and pain. This agent may also activate mitogen-activated protein kinase (p38MAPK), thereby inducing apoptosis in cancer cells.



• sodium stibogluconate

Pentavalent antimony (Sb) in differential complex formation with gluconic acid with established leishmanicidal use and potential antitumor activity. The Sb moiety of sodium stibogluconate (SSG) may inhibit protein tyrosine phophorylases (PTPases) by covalently modifying sulfhydryl groups in PTPase cysteine residues, resulting in specific inactivation of SH2 domain-containing tyrosine phosphatases-1 and -2 (SHP-1 and SHP-2), PTPases which negatively regulate interferon (IFN) signaling; enhancement of IFN-induced Stat1 tyrosine phosphorylation; and induction of cellular protein tyrosine phosphorylation. SSG in combination with IFN-alpha may synergize to overcome tumor cell resistance to IFN-alpha-mediated apoptosis.



• Sodothiol

(Other name for: sodium thiosulfate)



• Solu-Medrol

(Other name for: methylprednisolone)



• sorafenib tosylate

The tosylate salt of sorafenib, a synthetic compound targeting growth signaling and angiogenesis. Sorafenib blocks the enzyme RAF kinase, a critical component of the RAF/MEK/ERK signaling pathway that controls cell division and proliferation; in addition, sorafenib inhibits the VEGFR-2/PDGFR-beta signaling cascade, thereby blocking tumor angiogenesis.



• soy protein isolate

A dietary protein isolated from soybeans that contains isoflavone phytoestrogens. Soy protein isolate has been shown to reduce tumor incidence and growth in some animal studies, possibly by modulating estrogen metabolism, reducing tumor cell proliferation, and inducing tumor cell apoptosis. Soy protein isolate may also inhibit endothelial cell proliferation. Isoflavone phytoestrogens display mild estrogen-like activities which may regulate hormone balance and reduce the risks of breast cancer, heart disease, and osteoporosis.



• Sporanox

(Other name for: itraconazole)



• Sprycel

(Other name for: dasatinib)



• SR31747A

A synthetic peripheral sigma receptor ligand with immunomodulatory and potential antitumor activities. Although the exact mechanism by which SR31747A exerts its antitumor effects has not been fully established, SR31747A binds to and inhibits the sigma1 receptor (SR31747A-binding protein-1 or SR-BP1), human sterol isomerase (emopamil-binding protein) and the sigma2 receptor, which may result in a reduction in tumor cell proliferation and tumor cell apoptosis. In addition, this agent inhibits the production of pro-inflammatory cytokines while increasing anti-inflammatory cytokines. Upregulated in various cancers, the sigma1 and sigma2 receptors and human sterol isomerase are proteins that are involved in the regulation of cell proliferation and survival.



• SS1(dsFv)-PE38 immunotoxin

A recombinant immunotoxin consisting of the single chain anti-mesothelin monoclonal antibody SS1(dsFv) linked to Pseudomonas exotoxin PE-38. The monoclonal antibody moiety of the agent binds to cells that express mesothelin, a cell surface glycoprotein which may be overexpressed in ovarian cancer, mesotheliomas, and some squamous cell carcinomas; after internalization, the exotoxin moiety inactivates eukaryotic translation elongation factor 2, thereby disrupting tumor cell protein synthesis.



• STEPA

(Other name for: thiotepa)



• Sterapred

(Other name for: prednisone)



• Steritalc

(Other name for: talc)



• Strattera

(Other name for: atomoxetine hydrochloride)



• streptozocin

A methylnitrosourea antineoplastic antibiotic isolated from the bacterium Streptomyces achromogenes. Streptozocin alkylates DNA, forming inter-strand DNA cross-links and inhibiting DNA synthesis. Due to its glucose moiety, this agent is readily taken up by pancreatic beta cells, inducing diabetes mellitus at high concentrations. Unlike other nitrosoureas, streptozocin causes little myelosuppression.



• Stromagen

(Other name for: OTI-010)



• strontium chloride Sr 89

The chloride salt of a radioactive isotope of strontium. Strontium chloride Sr 89 is taken up and incorporated preferentially in metastatic lesions in bone where it emits cytotoxic beta radiation, resulting in an inhibition and/or reduction of tumor growth and so tumor-related bone pain.



• Sublimaze

(Other name for: fentanyl citrate)



• sulindac

A sulfinylindene derivative prodrug with potential antineoplastic activity. Converted in vivo to an active metabolite, sulindac, a nonsteroidal anti-inflammatory drug (NSAID), blocks cyclic guanosine monophosphate-phosphodiesterase (cGMP-PDE), an enzyme that inhibits the normal apoptosis signal pathway; this inhibition permits the apoptotic signal pathway to proceed unopposed, resulting in apoptotic cell death.



• Summicort

(Other name for: methylprednisolone)



• sunitinib malate

The orally bioavailable malate salt of an indolinone-based tyrosine kinase inhibitor with potential antineoplastic activity. Sunitinib blocks the tyrosine kinase activities of vascular endothelial growth factor receptor 2 (VEGFR2), platelet-derived growth factor receptor b (PDGFRb), and c-kit, thereby inhibiting angiogenesis and cell proliferation. This agent also inhibits the phosphorylation of Fms-related tyrosine kinase 3 (FLT3), another receptor tyrosine kinase expressed by some leukemic cells.



• suramin

A polysulphonated naphthylurea with potential antineoplastic activity. Suramin blocks the binding of various growth factors, including insulin-like growth factor I (IGF-I), epidermal growth factor (EGF), platelet-derived growth factor (PDGF), and tumor growth factor-beta (TGF-beta), to their receptors, thereby inhibiting endothelial cell proliferation and migration. This agent also inhibits vascular endothelial growth factor (VEGF)- and basic fibroblast growth factor (bFGF)-induced angiogenesis; retroviral reverse transcriptase; uncoupling of G-proteins from receptors; topoisomerases; cellular folate transport; and steroidogenesis.



• survivin antigen

A tumor-associated antigen. Vaccination with survivin antigen may result in a cytotoxic T-cell response against survivin antigen-expressing tumor cells, resulting in decreased tumor cell proliferation and tumor cell death. Overexpressed in many tumors, endogenous survivin inhibits tumor cell apoptosis.



• survivin inhibitor YM155

A novel proapoptotic agent with potential antineoplastic activity. Survivin inhibitor YM155 selectively inhibits survivin expression in tumor cells, resulting in inhibition of survivin antiapoptotic activity (via the extrinsic or intrinsic apoptotic pathways) and tumor cell apoptosis. Survivin, a member of the inhibitor of apoptosis (IAP) gene family, is expressed during embryonal development and is absent in most normal, terminally differentiated tissues; upregulated in a variety of human cancers, its expression in tumors is associated with a more aggressive phenotype, shorter survival times, and a decreased response to chemotherapy.



• Sutent

(Other name for: sunitinib malate)



• Symmetrel

(Other name for: amantadine hydrochloride)



• Synovir

(Other name for: thalidomide)



• synthetic breast cancer peptides-tetanus toxoid-Montanide ISA-51 vaccine

A cancer vaccine comprised of multiple synthetic breast cancer peptides and the adjuvant tetanus toxoid helper peptide emulsified in the adjuvant Montanide ISA-51 with immunopotentiation activity. Vaccination with this cancer vaccine may elicit a specific cytotoxic T-lymphocyte response against breast cancer cells. Synthetic breast cancer peptides may stimulate the immune response against cells that produce breast cancer markers such as erbB2 (HER2/neu) while tetanus toxoid helper peptide binds to class II MHC molecules as a nonspecific vaccine helper epitope, resulting in a long-term immunopotentiation by increasing the helper T-cell response. Montanide ISA-51 (also known as incomplete Freund's adjuvant or IFA), a stabilized water-in-oil emulsion adjuvant containing mineral oil with mannide oleate added as a surfactant, non-specifically stimulates cell-mediated immune responses to antigens.



• synthetic human corticotropin-releasing factor

A synthetic therapeutic agent which is chemically identical to or similar to the endogenous human corticotropin-releasing factor (hCRF). Synthesized in the hypothalamus, hCRF stimulates the anterior pituitary gland to secrete adrenocorticotropic hormone (ACTH). In cerebral edema, hCRF acts by impeding the flow of fluid from blood vessels into brain tissue, thereby decreasing edema and stabilizing intracranial pressure. This agent possesses anti-edema properties independent of adrenal gland function.



• synthetic human papillomavirus 16 E6 peptide

A synthetic peptide sequence of human papillomavirus (HPV) type 16 oncoprotein E6. The E6 oncoprotein is implicated in the tumorigenesis of cervical carcinoma. Vaccination with HPV 16 E6 peptide may stimulate the host immune system to mount a cytotoxic T lymphocyte (CTL) response against cells expressing the E6 oncoprotein, resulting in tumor cell lysis.



• synthetic melanoma-associated antigens vaccine

A cancer vaccine containing synthetic epitope peptides derived from melanoma tumor-associated antigens (TAAs), including melanoma-melanocyte antigen gp100(280-288), melanoma-associated antigen tyrosinase(1-9), and melanoma-associated antigen melan-A(27-35). Upon administration, synthetic melanoma-associated antigens vaccine may stimulate a cytotoxic T-lymphocyte immune response against melanoma cells that express TAAs which share epitopes with the vaccine epitope peptides, resulting in tumor cell lysis.



• synthetic peptide-based erythropoiesis stimulating agent

A synthetic, non-recombinant, pegylated, peptidic erythropoiesis stimulating agent. Synthetic peptide-based erythropoiesis stimulating agent binds to and activates the erythropoietin (EPO) receptor on erythroid progenitor cells, thereby inducing their proliferation and differentiation into mature erythrocytes.