title: Sphingosine-1-phosphate: a potential therapeutic agent against human breast cancer.
abstract: Sphingosine-1-phosphate (S1P) is an important regulator of cancer development and progression. Its cellular concentration is controlled predominantly by sphingosine kinase (SK) and sphingosine-1-phosphate lyase (SPL). In the current study we showed that mRNA expressions for both SK and SPL were up-regulated throughout all four disease stages in human breast cancer patients. Exogenous administration of S1P produced a bell-shaped dose response for apoptosis in normal mammary gland MCF12A cells but a sigmoid-shaped apoptotic response in breast cancer MCF7 cells. Co-administration of S1P enhanced the cytotoxicity of anticancer drug docetaxel against MCF7 cells.
authors.affiliation: Drug Design and Discovery Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
authors.forename: Binbing
authors.initials: B
authors.lastname: Ling
authors.forename: Lifeng
authors.initials: L
authors.lastname: Chen
authors.forename: Jane
authors.initials: J
authors.lastname: Alcorn
authors.forename: Baohua
authors.initials: B
authors.lastname: Ma
authors.forename: Jian
authors.initials: J
authors.lastname: Yang
mesh_terms: D000446:Aldehyde-Lyases / Q000235:genetics / Q000378:metabolism; D017209:Apoptosis / Q000187:drug effects; D001943:Breast Neoplasms / Q000188:drug therapy* / Q000201:enzymology / Q000235:genetics / Q000473:pathology; D049109:Cell Proliferation / Q000187:drug effects; D000077143:Docetaxel; D005260:Female; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D006801:Humans; D008246:Lysophospholipids / Q000494:pharmacology / Q000627:therapeutic use*; D017853:Phosphotransferases (Alcohol Group Acceptor) / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D013110:Sphingosine / Q000031:analogs & derivatives* / Q000494:pharmacology / Q000627:therapeutic use; D043823:Taxoids / Q000494:pharmacology; D000099157:Sphingosine Kinase
chemical_list: D000446:Aldehyde-Lyases; D000077143:Docetaxel; D008246:Lysophospholipids; D017853:Phosphotransferases (Alcohol Group Acceptor); D012333:RNA, Messenger; D013110:Sphingosine; D043823:Taxoids; D000099157:Sphingosine Kinase; C060506:sphingosine 1-phosphate; C022649:sphingosine 1-phosphate lyase (aldolase)