MedKooCat#:202870
Name:Temsirolimus
CAS#:162635-04-3
ChemicalFormula:C56H87NO16
ExactMass:1029.60249
MolecularWeight:1030.29
ElementalAnalysis:C,65.28;H,8.51;N,1.36;O,24.85
Synonym:CCI779;CCI779;CCI779;Temsirolimus;USbrandname:Torisel.
IUPAC/ChemicalName:(1R,2R,4S)-4-{(2R)-2-[(3S,6R,7E,9R,10R,12R,14S,15E,17E,19E,21S,23S,26R,27R,34aS)-9,27-dihydroxy-10,21-dimethoxy-6,8,12,14,20,26-hexamethyl-1,5,11,28,29-pentaoxo-1,4,5,6,9,10,11,12,13,14,21,22,23,24,25,26,27,28,29,31,32,33,34,34a-tetracosahydro-3H-23,27-epoxypyrido[2,1-c][1,4]oxazacyclohentriacontin-3-yl]propyl}-2-methoxycyclohexyl3-hydroxy-2-(hydroxymethyl)-2-methylpropanoate.
InChiKey:CBPNZQVSJQDFBE-FUXHJELOSA-N
InChiCode:InChI=1S/C56H87NO16/c1-33-17-13-12-14-18-34(2)45(68-9)29-41-22-20-39(7)56(67,73-41)51(63)52(64)57-24-16-15-19-42(57)53(65)71-46(30-43(60)35(3)26-38(6)49(62)50(70-11)48(61)37(5)25-33)36(4)27-40-21-23-44(47(28-40)69-10)72-54(66)55(8,31-58)32-59/h12-14,17-18,26,33,35-37,39-42,44-47,49-50,58-59,62,67H,15-16,19-25,27-32H2,1-11H3/b14-12+,17-13+,34-18+,38-26+/t33-,35-,36-,37-,39-,40+,41+,42+,44-,45+,46+,47-,49-,50+,56-/m1/s1
SMILESCode:O=C(O[C@H]1[C@H](OC)C[C@H](C[C@H]([C@@H](OC([C@@](CCCC2)([H])N2C(C([C@@]3(O)[C@H](C)CC[C@@](O3)([H])C[C@H](OC)/C(C)=C/C=C/C=C/[C@@H](C)C[C@@H](C)C([C@H](OC)[C@H](O)/C(C)=C/[C@H]4C)=O)=O)=O)=O)CC4=O)C)CC1)C(C)(CO)CO
Temsirolimus(CCI-779)isanintravenousdrugforthetreatmentofrenalcellcarcinoma(RCC),developedbyWyethPharmaceuticalsandapprovedbytheU.S.FoodandDrugAdministration(FDA)inlateMay2007,andwasalsoapprovedbytheEuropeanMedicinesAgency(EMEA)onNovember2007.ItisaderivativeofsirolimusandissoldasTorisel.
mTOR(mammaliantargetofrapamycin)isakinaseenzymeinsidethecellthatcollectsandinterpretsthenumerousandvariedgrowthandsurvivalsignalsreceivedbytumorcells.WhenthekinaseactivityofmTORisactivated,itsdownstreameffectors,thesynthesisofcellcycleproteinssuchascyclinDandhypoxia-induciblefactor-1a(HIF-1a)areincreased.HIF-1athenstimulatesVEGF.WhetherornotmTORkinaseisactivated,determineswhetherthetumorcellproduceskeyproteinsneededforproliferation,growth,survival,andangiogenesis.mTORisactivatedintumorcellsbyvariousmechanismsincludinggrowthfactorsurfacereceptortyrosinekinases,oncogenes,andlossoftumorsuppressorgenes.Theseactivatingfactorsareknowntobeimportantformalignanttransformationandprogression.mTORisparticularlyimportantinthebiologyofrenalcancer(RCC)owingtoitsfunctioninregulatingHIF-1alevels.MutationorlossofthevonHippelLindautumor-suppressorgeneiscommoninRCCandismanifestedbyreduceddegradationofHIF-1a.InRCCtumors,activatedmTORfurtherexacerbatesaccumulationofHIF-1abyincreasingsynthesisofthistranscriptionfactoranditsangiogenictargetgeneproducts.TemsirolimusisaspecificinhibitorofmTORandinterfereswiththesynthesisofproteinsthatregulateproliferation,growth,andsurvivaloftumorcells.TreatmentwithtemsirolimusleadstocellcyclearrestintheG1phase,andalsoinhibitstumorangiogenesisbyreducingsynthesisofVEGF.
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