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【英文标准名称】:StandardGuideforPerformanceofChineseHamsterOvaryCell/HypoxanthineGuaninePhosphoribosylTransferaseGeneMutationAssay
【原文标准名称】:中国仓鼠卵巢细胞/次黄质鸟嘌呤转磷酸核糖基酶基因变异鉴定的标准指南
【标准号】:ASTME1262-1988(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1988
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F04.16
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:Assay;Bioassay;Biologicaldataanalysis;Cellculture;Chemicals(environmentalanalysis);Chinesehamster;Geneticexamination;Hamsters;Hypoxanthineguaninephosphoribosyltransferase;Industrialmetals/alloys;Toxicity/toxicology--animals
【摘要】:TheCHO/HGPRTassaydetectsforwardmutationsoftheX-linkedhypoxanthine-guaninephosphoribosyltransferase(hgprt)locus(codingfortheenzyme,HGPRT)inChinesehamsterovary(CHO)cells.CellsoriginallyderivedfromChinesehamsterovarytissueareexposedtoatestarticleand,followinganappropriatecellcultureregimen,descendantsoftheoriginaltreatedpopulationaremonitoredforthelossoffunctionalHGPRT,presumablyduetomutations.Resistancetoapurineanalogue,6-thioguanine(6TG)(orlessdesirably,8-azaguanine(8AG)),isemployedasthegeneticmarker.HGPRTcatalyzestheconversionofthenontoxic6TGtoitstoxicribophosphorylatedderivative.Lossoftheenzymeoritsactivitythereforeleadstocellsresistantto6TG.BecauseHGPRTisanenzymeofthepurinenucleotidesalvagepathway,lossoftheenzymeisnotalethalevent.Differenttypesofmutationalevents(basesubstitutions,frameshifts,deletions,somechromosomaltypelesions,andsoforth)shouldtheoreticallybedetectableatthehgprtlocus.TheCHO/HGPRTassayhasbeenusedtostudyawiderangeofmutagens,includingradiations(2-4),andawidevarietyofchemicals(1),andcomplexchemicalmixtures(5).1.1Thisguidehighlightssomeofthemorerelevantbiologicalconceptsastheyarecurrentlyunderstood,andsummarizesthecriticaltechnicalaspectsforacceptablebioassayperformancesastheycurrentlyareperceivedandpracticed.TheChinesehamsterovarycell/hypoxanthineguaninephosphoribosyltransferase(CHO/HGPRT)assay(1)hasbeenwidelyappliedtothetoxicologicalevaluationofindustrialandenvironmentalchemicals.1.2Thisguideconcentratesonthepracticalaspectsofcellculture,mutagenesisprocedures,dataanalysis,qualitycontrol,andtestingstrategy.Thesuggestedapproachrepresentsaconsensusofthepanelmembersfortheperformanceoftheassay.Itistobeunderstood,however,thatthesearemerelygeneralguidelinesandarenottobefollowedwithouttheuseofsoundscientificjudgement.Usersoftheassayshouldevaluatetheirapproachbasedonthepropertiesofthesubstancestobetestedandthequestionstobeanswered.1.3Deviationfromtheguidelinesbasedonsoundscientificjudgementshouldbynomeansinvalidatetheresultsobtained.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:B41
【国际标准分类号】:07_080
【页数】:5P.;A4
【正文语种】:英语