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Markers for Heightened Monitoring, Imminent Death, and Euthanasia in Aged Inbred Mice

机译:自交小鼠的监测,即将死亡和安乐死的标志

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Thegoalofthisstudywastoidentifyobjectivecriteriathatwouldreliablypredictspontaneousdeathinagedinbredmice.WeevaluatedmaleandfemaleAKR/Jmice,whichdieatarelativelyyoungageduetothedevelopmentoflymphoma,aswellasmaleC57BL/6JandBALB/cByJmice.Micewereimplantedsubcutaneouslywithanidentificationchipthatalsoallowedremotemeasurementofbodytemperature.Temperaturesandbodyweightsweremeasuredweeklyuntilspontaneousdeathoccurredoruntileuthanasiawasperformedforhumanereasons.InAKR/Jmice,hypothermiaandweightlossbeganabout4wkpriortodeathandincreasedgraduallyduringthatantemorteminterval.InC57BL/6JandBALB/cByJmice,thesedeclinesbeganearlierandweremoreprolongedpriortodeath.However,C57BL/6JandBALB/cByJmicedevelopedarelativelyprecipitoushypothermiaduringthe2wkpriortodeath.Forall3strains,thederivedcompositescoreoftemperature×weight,expressedasapercentageofstablevaluesforeachmouse,wassimilarlyinformative.Thesechangesinindividualandcompositemeasurescansignaltheneedforcloserobservationoreuthanasiaofindividualmice.Validatedmarkersofclinicaldeclineorimminentdeathcanallowtheuseofendpointsthatreduceterminaldistress,donotsignificantlyaffectlongevityorsurvivaldata,andpermittimelycollectionofbiologicsamples.
机译:Thegoalofthisstudywastoidentifyobjectivecriteriathatwouldreliablypredictspontaneousdeathinagedinbredmice.WeevaluatedmaleandfemaleAKR / Jmice,whichdieatarelativelyyoungageduetothedevelopmentoflymphoma,aswellasmaleC57BL / 6JandBALB / cByJmice.Micewereimplantedsubcutaneouslywithanidentificationchipthatalsoallowedremotemeasurementofbodytemperature.Temperaturesandbodyweightsweremeasuredweeklyuntilspontaneousdeathoccurredoruntileuthanasiawasperformedforhumanereasons.InAKR / Jmice,hypothermiaandweightlossbeganabout4wkpriortodeathandincreasedgraduallyduringthatantemorteminterval.InC57BL / 6JandBALB / cByJmice,thesedeclinesbeganearlierandweremoreprolongedpriortodeath.However,C57BL / 6JandBALB / cByJmicedevelopedarelativelyprecipitoushypothermiaduringthe2wkpriortodeath.Forall3strains,thederivedcompositescoreoftemperature×体重,expressedasapercentageofstablevaluesforeachmouse,wassimilarlyinformative。这些变化需要单独的和复合的测量扫描信号,以便密切保存在另一只小老鼠身上。临床下降或即将死亡的标有日期的标记可以使用减少终末折磨,对寿命或生存数据无明显影响的有效终点,并允许及时收集生物样本。

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