MiR-217 is down-regulated in psoriasis and promotes keratinocyte differentiation via targeting GRHL2

Biochemical and Biophysical Research Communications
Haigang ZhuZhiming Li

Abstract

MiR-217 is a well-known tumor suppressor, and its down-regulation has been shown in a wide range of solid and leukaemic cancers. However, the biological role of miR-217 in psoriasis pathogenesis, especially in keratinocyte hyperproliferation and differentiation, is not clearly understood. In this study, we found the expression of miR-217 was markedly down-regulated in psoriasis keratinocytes of psoriatic patients. In addition, overexpression of miR-217 inhibited the proliferation and promoted the differentiation of primary human keratinocytes. On the contrary, inhibition of endogenous miR-217 increased cell proliferation and delayed differentiation. Furthermore, Grainyhead-like 2 (GRHL2) was identified as a direct target of miR-217 by luciferase reporter assay. The expression of miR-217 and GRHL2 was inversely correlated in both transfected keratinocytes and in psoriasis lesional skin. Moreover, knocking down GRHL2 expression by siRNA enhanced keratinocyte differentiation. Taken together, our results demonstrate a role for miR-217 in the regulation of keratinocyte differentiation, partially through the regulation of GRHL2.

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Citations

May 2, 2017·Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine·Lijun MaJianmin Sun
Aug 9, 2017·Journal of Cellular Physiology·Agnieszka Gogler-PigłowskaDorota Scieglinska
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