DUSP9, a Dual-Specificity Phosphatase with a Key Role in Cell Biology and Human Diseases
Open Access
- 26 October 2021
- journal article
- review article
- Published by MDPI AG in International Journal of Molecular Sciences
- Vol. 22 (21), 11538
- https://doi.org/10.3390/ijms222111538
Abstract
Mitogen-activated protein kinases (MAPKs) are essential for proper cell functioning as they regulate many molecular effectors. Careful regulation of MAPKs is therefore required to avoid MAPK pathway dysfunctions and pathologies. The mammalian genome encodes about 200 phosphatases, many of which dephosphorylate the MAPKs and bring them back to an inactive state. In this review, we focus on the normal and pathological functions of dual-specificity phosphatase 9 (DUSP9)/MAP kinase phosphatases-4 (MKP-4). This cytoplasmic phosphatase, which belongs to the threonine/tyrosine dual-specific phosphatase family and was first described in 1997, is known to dephosphorylate ERK1/2, p38, JNK and ASK1, and thereby to control various MAPK pathway cascades. As a consequence, DUSP9 plays a major role in human pathologies and more specifically in cardiac dysfunction, liver metabolic syndromes, diabetes, obesity and cancer including drug response and cell stemness. Here, we recapitulate the mechanism of action of DUSP9 in the cell, its levels of regulation and its roles in the most frequent human diseases, and discuss its potential as a therapeutic target.Funding Information
- Fondation Groupama pour la Santé (N/A, N/A, N°2018-1R30114, contract N° PJA 20191209631, contract n°AAPPEAC2018.LCC/CG, N/A)
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