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R&D Systems/Recombinant Human VEGF 165 Protein/293-VE-001MG/CF/1 mg
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Purity>97%,bySDS-PAGEvisualizedwithSilverStainingandquantitativedensitometrybyCoomassie®BlueStaining.EndotoxinLevelActivityMeasuredinacellproliferationassayusingHUVEChumanumbilicalveinendothelialcells.Conn,G.etal.(1990)Proc.Natl.Acad.Sci.USA87:1323.TheED50forthiseffectis1-6 ng/mL.ThespecificactivityofrecombinanthumanVEGF165isapproximately1.7x103U/μg, whichiscalibratedagainstrecombinanthumanVEGF165WHOStandard(NIBSCcode:02/286).SourceSpodopterafrugiperda,Sf21(baculovirus)-derivedAla27-Arg191Accession#NP_001165097N-terminalSequenceAnalysisAla27Structure/FormDisulfide-linkedhomodimerPredictedMolecularMass19.2kDa(monomer)SDS-PAGE20-22kDa,reducingconditions39-42kDa,non-reducingconditionsReferences:Leung,D.W.etal.(1989)Science246:1306. Keck,P.J.etal.(1989)Science246:1309. Byrne,A.M.etal.(2005)J.Cell.Mol.Med.9:777. Robinson,C.J.andS.E.Stringer(2001)J.Cell.Sci.114:853.Pan,Q.etal.(2007)J.Biol.Chem.282:24049.Weis,S.M. andD.A.Cheresh(2005)Nature437:497.Thurston,G.(2002)J.Anat.200:575.Carvalho,J.F.etal.(2007)J.Clin.Immunol.27:246.Angelo,L.S. andR.Kurzrock(2007)Clin.CancerRes.13:2825.LongName:VascularEndothelialGrowthFactorEntrezGeneIDs:7422(Human);22339(Mouse);83785(Rat);281572(Bovine);403802(Canine);493845(Feline);30682(Zebrafish)AlternateNames:MVCD1;VAS;vascularendothelialgrowthfactorA;VascularpermeABIlityfactor;Vasculotropin;VEGF;VEGFA;VEGF-A;VEGFMGC70609;VPF;VPFvascularendothelialgrowthfactorBackground:Vascularendothelialgrowthfactor(VEGForVEGF-A),alsoknownasvascularpermeabilityfactor(VPF),isapotentmediatorofbothangiogenesisandvasculogenesisinthefetusandadult(1-3).ItisamemberofthePDGFfamilythatischaracterizedbythepresenceofeightconservedcysteineresiduesandacystineknotstructure(4).Humansexpressalternatelysplicedisoformsof121,145,165,183,189,and206aminoacids(aa)inlength(4).VEGF165appearstobethemostabundantandpotentisoform,followedbyVEGF121andVEGF189(3, 4).IsoformsotherthanVEGF121containbasicheparin-bindingregionsandarenotfreelydiffusIBLe(4).HumanVEGF165shares88% aasequenceidentitywithcorrespondingregionsofmouseandrat,96%withporcine,95%withcanine,and93%withfeline,equineandbovineVEGF,respectively.VEGFbindsthetypeItransmembranereceptortyrosinekinasesVEGFR1(alsocalledFlt-1)andVEGF R2(Flk-1/KDR)onendothelialcells(4).AlthoughVEGFaffinityishighestforbindingtoVEGFR1,VEGFR2appearstobetheprimarymediatorofVEGFangiogenicactivity(3,4).VEGF165bindsthesemaphorinreceptor,Neuropilin-1andpromotescomplexformationwithVEGFR2(5).VEGFisrequiredduringembryogenesistoregulatetheproliferation,migration,andsurvivalofendothelialcells(3, 4).Inadults,VEGFfunctionsmainlyinwoundhealingandthefemalereproductivecycle(3).Pathologically,itisinvolvedintumorangiogenesisandvascularleakage(6,7).CirculatingVEGFlevelscorrelatewithdiseaseactivityinautoimmunediseasessuchasrheumatoidarthritis,multiplesclerosisandsystemiclupuserythematosus(8).VEGFisinducedbyhypoxiaandcytokinessuchasIL-1,IL-6,IL-8,oncostatinMandTNF-alpha(3, 4, 9).
R&D Systems位于美国的明尼苏达州,一直致力于生物制品的开发与生产。公司成立之初主要生产用于医院及临床应用的血控品。1997年,公司推出第一个产品--富血小板血浆质控品;1981年,公司成为全球第二家生产含血小板全血控品的供应商。40多年的发展中,R&D Systems仍持续开发各种血控品产品。
1985年,作为公司推出的第一个科研试剂产品,也是全球第一家将该产品进行商业化生产的产品,R&D Systems成功上市了TGF-beta1蛋白。作为胞外信号分子,TGF-beta1蛋白在多种细胞中进行表达,并作为胞外信号分子参与免疫功能,细胞增殖和细胞分化等生物学过程。该产品推出后,公司陆续从生物材料中纯化了几种细胞因子产品并推向市场。
天然蛋白类产品的成功推广,加速了R&D Systems在细胞因子市场的开拓。公司于1985年形成Growth Factor事业部(现Biotechnology事业部)。Biotechnology事业部的目标是生产和营销重组人细胞因子。与天然来源提取蛋白相比较,DNA重组技术生产的蛋白产品其成本更低,产量更高,完全摆脱原料的限制。1989年,Biotechnology事业部开始开发抗细胞因子的单克隆和多克隆抗体,并于1990年开发了第一个ELISA试剂盒。
2014年2月10日,R&D Systems的母公司宣布命名为Bio-Techne. Bio-Techne旗下包括R&D Systems, Novus Biologicals, BiosPacific, Tocris Bioscience, Boston Biochem和Bionostics。
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