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R&D Systems/Recombinant Human IL-6 Protein/206-IL-001MG/CF/1 mg
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Purity>97%,bySDS-PAGEunderreducingconditionsandvisualizedbysilverstain.EndotoxinLevelActivityMeasuredinacellproliferationassayusingT1165.85.2.1mouseplasmacytomacells.Nordan,R.P.et al.(1987)J.Immunol.139:813.TheED50forthiseffectis0.2-0.8ng/mL.ThespecificactivityofRecombinantHumanIL-6isapproximately 1.1 x 105 IU/μg,whichiscalibratedagainsthumanIL‑6WHOInternationalStandard(NIBSCcode:89/548).SourceE.coli-derivedPro29-Met212Accession#Q75MH2N-terminalSequenceAnalysisPro29PredictedMolecularMass20.3kDaReferences:Mansell,A.andB.J.Jenkins(2013)CytokineGrowthFactorRev.24:249.Schuett,H.etal.(2009)Thromb.Haemost.102:215.Erta,M.etal.(2012)Int.J.Biol.Sci.8:1254.Garbers,C.etal.(2012)CytokineGrowthFactorRev.23:85.Mihara,M.etal.(2012)Clin.Sci.(Lond.)122:143.Hirano,T.etal.(1986)Nature324:73.Kestler,D.P.etal.(1995)Blood86:4559.Kestler,D.P.etal.(1999)Am.J.Hematol.61:169.Bihl,M.P.etal.(2002)Am.J.Respir.CellMol.Biol.27:48.Alberti,L.etal.(2005)CancerRes.65:2.Murakami,M.etal.(1993)Science260:1808.Muller-Newen,G.(2003)Sci.STKE2003:PE40.Mitsuyama,K.etal.(2006)Clin.Exp.Immunol.143:125.Cerutti,A.etal.(1998)J.Immunol.160:2145.LongName:Interleukin6EntrezGeneIDs:3569(Human);16193(Mouse);24498(Rat);399500(Porcine);280826(Bovine);403985(Canine);100034196(Equine);493687(Feline);100008733(Rabbit)AlternateNames:Bcellstimulatoryfactor-2;B-celldifferentiationfactor;BSF-2;BSF2CTLdifferentiationfactor;CDF;HGFHSFIFNB2Hybridomagrowthfactor;IFN-beta-2;IL6;IL-6;IL-6B-cellstimulatoryfactor2;Interferonbeta-2;interleukin6(interferon,beta2);interleukinBSF-2;interleukin-6;MGI-2ABackground:Interleukin-6(IL-6)isapleiotropic,alpha-helical,22-28kDaphosphorylatedandvariablyglycosylatedcytokinethatplaysimportantrolesintheacutephasereaction,inflammation,hematopoiesis,bonemetabolism,andcancerprogression(1-5).MaturehumanIL-6is183aminoacids(aa)inlengthandshares39%aasequenceidentitywithmouseandratIL-6(6).Alternativesplicinggeneratesseveralisoformswithinternaldeletions,someofwhichexhibitantagoNISTicproperties(7-10).IL-6inducessignalingthroughacellsurfaceheterodimericreceptorcomplexcomposedofaligandbindingsubunit(IL-6Ralpha)andasignaltransducingsubunit(gp130).IL-6bindstoIL-6Ralpha,triggeringIL-6Ralphaassociationwithgp130andgp130dimerization(11).gp130isalsoacomponentofthereceptorsforCLC,CNTF,CT-1,IL-11,IL-27,LIF,andOSM(12).SolubleformsofIL-6Ralphaaregeneratedbybothalternativesplicingandproteolyticcleavage(5).Inamechanismknownastrans-signaling,complexesofsolubleIL-6andIL-6Ralphaelicitresponsesfromgp130-expressingcellsthatlackcellsurfaceIL-6Ralpha(5).Trans-signalingenablesawiderrangeofcelltypestorespondtoIL-6,astheexpressionofgp130isubiquitous,whilethatofIL-6Ralphaispredominantlyrestrictedtohepatocytes,monocytes,andrestinglymphocytes(2,5).Solublespliceformsofgp130blocktrans-signalingfromIL-6/IL-6Ralphabutnotfromothercytokinesthatusegp130asaco-receptor(5,13).IL-6,alongwithTNF-alphaandIL-1,drivestheacuteinflammatoryresponseandthetransitionfromacuteinflammationtoeitheracquiredimmunityorchronicinflammatorydisease(1-5).Whendysregulated,itcontributestochronicinflammationinobesity,insulinresistance,inflammatoryboweldisease,arthritis,sepsis,andatherosclerosis(1,2,5).IL-6canalsofunctionasananti-inflammatorymolecule,asinskeletalmusclewhereitissecretedinresponsetoexercise(2).Inaddition,itenhanceshematopoieticstemcellproliferationandthedifferentiationofTh17cells,memoryBcells,andplasmacells(1,14).

      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。