Dual specificity protein phosphatase 8 (DUSP8)

Dual specificity protein phosphatase 8 (DUSP8) is an enzyme that belongs to the dual specificity phosphatase family, capable of dephosphorylating both phosphoserine/threonine and phosphotyrosine residues on mitogen-activated protein kinases (MAPKs), specifically acting as a negative regulator of the JNK, ERK, and p38 MAPK pathways[1][2][4][5]. DUSP8 is predominantly expressed in adult brain, heart, and skeletal muscle, and localizes to both the cytoplasm and nucleus[1][2][4]. Its expression and activity are regulated by stimuli such as nerve growth factor and insulin, and it plays a crucial role in modulating cellular stress responses, proliferation, differentiation, and apoptosis[4][5]. Aberrant expression or loss of DUSP8 is associated with a range of human diseases, including cancer (e.g., breast, colorectal, lung), diabetic kidney disease, acute lung injury, and neuropsychiatric conditions, and its expression levels are emerging as both disease biomarkers and potential therapeutic targets[4].

Other names

C11orf81HVH-5M3/6HB5HVH8Dual specificity phosphatase 8Homologue of Vaccinia virus H1 phosphatase gene clone 5

Dephosphorylation of MAPKs (JNK, ERK, p38) leading to their inactivation[1][2][4][5] Modulation of cell proliferation, apoptosis, and stress responses by controlling MAPK pathway activity[2][4]