
Description
Cultrex®BasementMembraneExtract(BME)isasolubleformofbasementmembranepurifiedfromEngelbreth-Holm-Swarm(EHS)tumor.Thisextractprovidesanaturalextracellularmatrixhydrogelthatpolymerizesat37°Ctoformareconstitutedbasementmembrane.Basementmembranesarecontinuoussheetsofspecializedextracellularmatrixthatformaninterfacebetweenendothelial,epithelial,muscle,orneuronalcellsandtheiradjacentstromaandthatplayanessentialroleintissueorganizationbyinfluencingcelladhesion,migration,proliferation,anddifferentiation.ThemajorcomponentsofBMEincludelaminin,collagenIV,entactin,andheparansulfateproteoglycans.
Cultrex®RGFBMETypeR1isaBasementMembraneMatrixthathasbeendeveloped,producedandqualifiedspecificallyfordifficultorganoidcultures.Cultrex®RGFBMETypeR1isprocessedtoreducematrix-associatedgrowthfactorsandprovideamoredefinedmodelsystem.
Qualitycontrolspecifications:
- Mousecoloniesareroutinelyscreenedforpathogensusing mouseantibodyproduction(MAP)testing.
- Engelbreth-Holm-Swarm(EHS)tumorisLDEV-free.
- PathClear®–testednegativebyPCRfor17bacterialandvirusstrainstypicallyincludedinmouseantibodyproduction(MAP)testing,plus13additionalmurineinfectiousagentsincludingLDEV,foratotalof31organismsandviruses.
- Nobacterialorfungalgrowthdetectedafterincubationat37°Cfor14daysfollowingUSPsterilitytestingguidelines.
- Endotoxinconcentration≤8EU/mlbyLimulusAmoebocyteLysate(LAL)assay.
- Proteinconcentrationof12–18mg/ml.
- NomycoplasmacontaminationdetectedbyPCR.
- ProvidedinDulbecco’sModifiedEagle’smedium(DMEM)withoutphenolred,with10µg/mlgentamicinsulfate.
- GelstABIlitytestedforaperiodof14daysat37°C.
- Entactincontent≥8%.
- BIOLOGicalactivitydeterminedforeachlot:
- Tubeformationassay–BMEpromotesformationofcapillary-likestructuresbyhuman(HBMVEC;HUVEC)ormouse(SVEC4-10)endothelialcells.
- Organoidculture:BasementMembraneExtractpromotesgrowthandexpansionofmousesmallintestineorganoidProgenitorcells.
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算上其他生物24种
大概是记不太清了
本人目前需从电鳗放电器官中提取乙酰胆碱受体蛋白,提纯需要的步骤和电鳗器官都可以提供,有没有提供外包提纯服务的公司或者实验室。
NaturalProteinStopsDeadlyHumanBrainCancerInMice
ScientistsfromJohnsHopkinsandfromtheUniversityofMilanhaveeffectivelyproventhattheycaninhibitlethalhumanbraincancersinmiceusingaproteinthatselectivelyinducespositivechangesintheactivityofcellsthatbehavelikecancerstemcells.ThereportispublishedinNature.
Themostcommontypeofbraincancer-glioblastoma-ismarkedbythepresenceofthesestem-cell-likebraincells,which,insteadoftriggeringthereplacementofdamagedcells,formcancertissue.Stemcells,unlikeallothercellsinthebody,arecapableofformingalmostanykindofcellwhentheright"signals"triggertheirdevelopment.
Fortheirtreatmentexperiment,theresearchersreliedonaclassofproteins,bonemorphogenicproteins,thatcauseneuralstem-cell-likeclusterstolosetheirstemcellproperties,whichinturnstopstheirABIlitytodivide.
Firsttheypretreatedhumanglioblastomacellswithbonemorphogenicprotein4(BMP4),theninjectedthesetreatedcellsintomousebrains.Inmiceinjectedwithcellsthatwerenotpretreated,large,invasivecancersgrew.InthemicewithBMP4-treatedcells,nocancersgrewatall.Threetofourmonthsafterinjection,allmicethatgotuntreatedcellsdied,andnearlyallmicewithBMP4-treatedcellswerealive.
Next,thescientistsdeliveredslow-releaseBMP4-containing"beads"directlyintomousebrainswithimplantedglioblastomacells.Micethatgotemptybeadsdevelopedlargemalignanttumorsanddied.MicewithBMP4beadssurvivedmuchlonger,and80percentsurvivedfourmonthsaftercancercellimplants.
"OurideaistotreatpatientswithBMP4orsomethinglikeitrightaftersurgerytoremoveglioblastomainhopesofpreventingtheregrowthofthecancerandimprovingsurvivaltime,"saysAlessandroOlivi,M.D.,directoroftheDivisionofNeurosurgicalOncologyatHopkinsandacontributortothestudy.
OlivisaysclinicalstudiesusingBMP4couldbeginwithinayearand,ifsuccessful,drugtherapiescouldbeavailabletothepublicwithinthreetofouryears.
"ThiswasproofoftheideathatBMPscouldstopglioblastomabydepletingthestem-cell-likepopulationthatfeedsit,"saysHenryBrem,M.D.,chairmanoftheDepartmentofNeurosurgeryatHopkinsandacollaboratorinthestudy."Thisopensexcitingdoorstofutureresearchintotreatmentsandtherapiesforsuchadevastatingdisease."

