Human endogenous retroviruses and cancer-中国Betway体育网页登陆

摘要 Humanendogenousretroviruses(HERVs)areretrovirusesthatinfectedhumangenomemillionsofyearsagoandhavepersistedthroughouthumanevolution.About8%ofourgenomeiscomposedofHERVs,mostofwhicharenonfunctionalbecauseofepigeneticcontrolordeactivatingmutations.However,acorrelationbetweenHERVsandhumancancerhasbeendescribedandmanytumors,suchasmelanoma,breastcancer,germcelltumors,renalcancerorovariancancer,expressHERVproteins,mainlyHERV-K(HML6)andHERV-K(HML2).AlthoughthecausativeroleofHERVsincanceriscontroversial,datafromanimalmodelsdemonstratedthatendogenousretrovirusesarepotentiallyoncogenic.HERVproteinexpressioninhumancellsgeneratesanimmuneresponsebyactivatinginnateandadaptiveimmunities.SomeHERV-derivedpeptideshaveantigenicproperties.Forexample,HERV-K(HML-6)encodestheHER-KMELpeptiderecognizedbyCD8+lymphocytes.Inaddition,HERVsaretwoedgedimmunomodulators.HERVsshowimmunosuppressiveactivity.Thepresenceofgenomicretroviralelementsinhost-cellcytosolmayactivateaninterferontypeIresponse.Therefore,targetingHERVsthroughcellularvaccinesorimmunomodulatorydrugscombinedwithcheckpointinhibitorsisattractinginterestbecausetheycouldbeactiveinhumantumors.

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Human endogenous retroviruses and cancer

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