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dc.contributor.authorKazak, Lawrence
dc.contributor.authorChouchani, Edward T
dc.contributor.authorStavrovskaya, Irina G
dc.contributor.authorLu, Gina Z
dc.contributor.authorJedrychowski, Mark P
dc.contributor.authorEgan, Daniel F
dc.contributor.authorKumari, Manju
dc.contributor.authorKong, Xingxing
dc.contributor.authorErickson, Brian K
dc.contributor.authorSzpyt, John
dc.contributor.authorRosen, Evan D
dc.contributor.authorMurphy, Michael P
dc.contributor.authorKristal, Bruce S
dc.contributor.authorGygi, Steven P
dc.contributor.authorSpiegelman, Bruce M
dc.date.accessioned2018-03-28T11:28:19Z
dc.date.available2018-03-28T11:28:19Z
dc.date.issued2017-07-25
dc.identifier.issn0027-8424
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/274454
dc.description.abstractBrown adipose tissue (BAT) mitochondria exhibit high oxidative capacity and abundant expression of both electron transport chain components and uncoupling protein 1 (UCP1). UCP1 dissipates the mitochondrial proton motive force (Δp) generated by the respiratory chain and increases thermogenesis. Here we find that in mice genetically lacking UCP1, cold-induced activation of metabolism triggers innate immune signaling and markers of cell death in BAT. Moreover, global proteomic analysis reveals that this cascade induced by UCP1 deletion is associated with a dramatic reduction in electron transport chain abundance. UCP1-deficient BAT mitochondria exhibit reduced mitochondrial calcium buffering capacity and are highly sensitive to mitochondrial permeability transition induced by reactive oxygen species (ROS) and calcium overload. This dysfunction depends on ROS production by reverse electron transport through mitochondrial complex I, and can be rescued by inhibition of electron transfer through complex I or pharmacologic depletion of ROS levels. Our findings indicate that the interscapular BAT of Ucp1 knockout mice exhibits mitochondrial disruptions that extend well beyond the deletion of UCP1 itself. This finding should be carefully considered when using this mouse model to examine the role of UCP1 in physiology.
dc.format.mediumPrint-Electronic
dc.languageeng
dc.publisherProceedings of the National Academy of Sciences
dc.subjectMitochondria
dc.subjectAnimals
dc.subjectMice, Knockout
dc.subjectMice
dc.subjectCalcium
dc.subjectReactive Oxygen Species
dc.subjectAcclimatization
dc.subjectElectron Transport
dc.subjectFemale
dc.subjectMale
dc.subjectAdipose Tissue, Brown
dc.subjectCold Temperature
dc.subjectUncoupling Protein 1
dc.titleUCP1 deficiency causes brown fat respiratory chain depletion and sensitizes mitochondria to calcium overload-induced dysfunction.
dc.typeArticle
prism.endingPage7986
prism.issueIdentifier30
prism.publicationDate2017
prism.publicationNameProc Natl Acad Sci U S A
prism.startingPage7981
prism.volume114
dc.identifier.doi10.17863/CAM.12169
dcterms.dateAccepted2017-05-22
rioxxterms.versionofrecord10.1073/pnas.1705406114
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2017-07
dc.contributor.orcidMurphy, Mike [0000-0003-1115-9618]
dc.identifier.eissn1091-6490
rioxxterms.typeJournal Article/Review
pubs.funder-project-idWellcome Trust (110159/Z/15/Z)
cam.issuedOnline2017-06-19


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