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Proteasome activity correlates with male BMI and contributes to the differentiation of adipocyte in hADSC

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Abstract

We have previously reported that 26S proteasome subunit mRNA expressions correlate with male body mass index (BMI). In this study, to investigate whether proteasome activities are correlated with BMI, we recruited 61 healthy young Japanese male subjects, measured proteasome activities in their plasma, and correlated them with their BMI and various metabolic factors. We found that among three different proteasome activities, chymotrypsin-like activity in plasma was positively correlated with BMI in healthy Japanese male subjects. Furthermore, we analyzed proteasome activity in vitro during the differentiation of human adipose-derived stem cell (hADSC) into mature adipocytes. In the early stage of differentiation, proteasome activity was at its highest level, and proteasome inhibitor could inhibit hADSC adipocyte differentiation. Our findings suggest that proteasome is an important controlling factor for the development of obesity and adipogenesis.

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Acknowledgments

This work was supported in part by Grants-in-Aid for Scientific Research from the Japan Science Technology Agency and the Core Research for Evolutional Science and Technology (CREST), 21st Century Center of Excellence (COE) Program.

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Correspondence to Youichi Sato.

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Sakamoto, K., Sato, Y., Sei, M. et al. Proteasome activity correlates with male BMI and contributes to the differentiation of adipocyte in hADSC. Endocr 37, 274–279 (2010). https://doi.org/10.1007/s12020-009-9298-4

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