Abstract
Receptor-interacting protein (RIP) is a well-characterized coregulator for nuclear receptors. Here, we report the expression of RIP as two isoforms with molecular weights of 140 kDa and 137 kDa in liver and kidney, but only as one isoform of 140 kDa in lung, adipose tissue, prostate and testis of mice. The levels of both the isoforms decreased in liver and kidney of old mice compared with adult mice. The expression of RIP140 in kidney was relatively lower in old males than females. In contrast, adipose tissue showed remarkably higher levels of RIP140 in old than adult mice of both sexes. Thus, the expression of RIP varied with the type of tissue, sex and age of mice, suggesting differences in its function as a coregulator.
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Acknowledgements
The authors would like to thank Dr Ngan Vo for providing RIP140 antibody. Swati Ghosh is a recipient of Senior Research Fellowship from the University Grants Commission, India. This work was supported by grants from the Department of Biotechnology (BT/PR3593/Med/14/468/2003), Government of India to M.K.T.
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Ghosh, S., Thakur, M.K. Tissue-specific expression of receptor-interacting protein in aging mouse. AGE 30, 237–243 (2008). https://doi.org/10.1007/s11357-008-9062-3
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DOI: https://doi.org/10.1007/s11357-008-9062-3