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Differential expression of dipeptidyl peptidase IV in human versus cynomolgus monkey skin eccrine sweat glands

Pantano, Serafino and Dubost, Valerie and Darribat, Katy and Couttet, Philippe and Grenet, Olivier and Busch, Steven and Moulin, Pierre (2013) Differential expression of dipeptidyl peptidase IV in human versus cynomolgus monkey skin eccrine sweat glands. Journal of Molecular Histology, 44 (6). pp. 733-747. ISSN 1567-2387

Abstract

Dipeptidyl peptidase IV (DPP4) is a peptidase whose inhibition is beneficial in Type II diabetes treatment. Several evidences suggest potential implication of DPP4 in skin disorders such as psoriasis, keloids and fibrotic skin diseases where its inhibition could also be beneficial. DPP4 expression in human skin was described mainly in dermal fibroblasts and a subset of keratinocytes in the basal layer. Of importance in the perspective of preclinical experimentation, DPP4 distribution in skin of non-human primate species has not been documented. This report evidences unexpected differences between human and cynomolgus monkey skin revealing a major expression of DPP4 in eccrine sweat glands of cynomolgus monkeys but not in humans. This represents a unique distinctive feature compared to the conserved expression of dipeptidyl peptidases 8 and 9 and potential relevant DPP4 substrates such as neuropeptide Y (NPY) and receptors (NPY-receptor 1 and Neurokinin receptor). Finally the observation that cathepsin D, an unrelated protease, shows the opposite expression compared to DPP4 (present in human but not in cynomolgus monkey eccrine sweat glands) proves that human eccrine sweat glands evolved a divergent protease repertoire compared to non-human primates. These unexpected differences in the eccrine sweat glands protease repertoire could imply profound biochemical divergences, reflecting the functional evolution of the glands and the control of their activity. Our findings also demonstrate that non-human primates studies aiming at understanding DPP4 function in skin biology are not readily translatable to human.

Item Type: Article
Keywords: Eccrine sweat gland; DPP4; DPP8; DPP9; cathepsin D
Date Deposited: 12 Oct 2016 00:45
Last Modified: 12 Oct 2016 00:45
URI: https://oak.novartis.com/id/eprint/10056

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