Adams 2010 Biochim Biophys Acta

Adams AE, Kelly OM, Porter RK (2010) Absence of mitochondrial uncoupling protein 1 affects apoptosis in thymocytes, thymocyte/T-cell profile and peripheral T-cell number. Biochim Biophys Acta 1797:807-16.

» PMID:20417612

Adams AE, Kelly OM, Porter RK (2010) Biochim Biophys Acta

Abstract: Our laboratory has previously demonstrated the presence of constitutively expressed mitochondrial uncoupling protein 1 in mouse thymocytes. In our endeavours to understand the role of mitochondrial uncoupling protein 1 in thymocyte function, we compared cell profiles in thymus and spleen of wild-type with those of UCP 1 knock-out mice, which in turn led to comparative investigations of apoptotic potential in thymocytes from these mice. We demonstrate that spleen cell numbers were reduced ∼3-fold in UCP 1 knock-out mice compared to wild-type mice. We record a halving of CD8 single positive cell numbers in thymus with a significant incremental increase in CD4/CD8 double positives cell numbers in the thymus of UCP 1 knock-out mice compared to wild-type mice. These data are mirrored by an approximate halving of CD8 single positive cell numbers and a doubling of CD4/CD8 double positive cell numbers in the spleen of UCP 1 knock-out mice compared to wild-type mice. These differences are most probably explained by our observations of decreased apoptotic potential and higher ATP levels in thymocytes of UCP 1 knock-out mice when compared to wild-type controls. We conclude that constitutively expressed UCP 1 is a factor in determining T-cell population selection in mice. • Keywords: mitochondria, uncoupling protein, thymus, spleen

• O2k-Network Lab: IE_Dublin_Porter_RK

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Organism: Mouse  Tissue;cell: Islet cell;pancreas;thymus  Preparation: Intact cells 

HRR: Oxygraph-2k 

mitochondria, uncoupling protein, thymus, spleen