Abstract
Cathepsins are a diverse group of proteases that are increasingly being recognized for their role in various disease states. The focus of this article is to review the data regarding the activity of cathepsin K and cathepsin S in adipocyte differentiation and function as well as glucose metabolism. Data from animal and human studies have shown up-regulation of cathepsin K expression in white adipose tissue of overweight/obese mice and humans. Cathepsin K appears to affect adipocyte differentiation as well as weight gain. Data from studies using cathepsin K blocking agents suggest that by blocking cathepsin K, there is reduction in adipocyte differentiation and weight gain. Cathepsin K also may play a role in glucose metabolism with higher cathepsin K levels being associated with insulin resistance. Cathepsin S is also overexpressed in adipose tissue of overweight/obese subjects. Both murine and human models have been studied to further investigate its role in adipocytes and obesity. Cathepsin S appears to be involved in glucose dysregulation as well as pathogenesis of diabetes mellitus. Further studies are necessary to better characterize the role of cathepsin K and S and to examine whether there is potential for targeted therapy for prevention and treatment of obesity as well as diabetes mellitus.
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C. Wilczynski, S. Samarasinghe, M. A. Emanuele, N. Emanuele, L. Shah, A. Mazhari declare that they have no conflict of interest.
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Wilczynski, C., Samarasinghe, S., Emanuele, M.A. et al. Cathepsins K and S: Role in Bone, Adipocytes, and Glucose Regulation. Clinic Rev Bone Miner Metab 13, 2–10 (2015). https://doi.org/10.1007/s12018-015-9177-x
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DOI: https://doi.org/10.1007/s12018-015-9177-x