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Kwon, Duk-Hwa; Eom, Gwang Hyeon; Ko, Jeong Hyeon; Shin, Sera; Joung, Hosouk; Choe, Nakwon; Nam, Yoon Seok; Min, Hyun-Ki; Kook, Taewon; Yoon, Somy; Kang, Wanseok; Kim, Yong Sook; Kim, Hyung Seok; Choi, Hyuck; Koh, Jeong-Tae; Kim, Nacksung; Ahn, Youngkeun; Cho, Hyun-Jai; Lee, In-Kyu; Park, Dong Ho; Suk, Kyoungho; Seo, Sang Beom; Wissing, Erin R; Mendrysa, Susan M; Nam, Kwang-Il; Kook, Hyun
Nature communications, 2016-Feb-01, 2016-02-01, 20160201, Letnik: 7, Številka: 1Journal Article
Vascular calcification (VC) is often associated with cardiovascular and metabolic diseases. However, the molecular mechanisms linking VC to these diseases have yet to be elucidated. Here we report that MDM2-induced ubiquitination of histone deacetylase 1 (HDAC1) mediates VC. Loss of HDAC1 activity via either chemical inhibitor or genetic ablation enhances VC. HDAC1 protein, but not mRNA, is reduced in cell and animal calcification models and in human calcified coronary artery. Under calcification-inducing conditions, proteasomal degradation of HDAC1 precedes VC and it is mediated by MDM2 E3 ubiquitin ligase that initiates HDAC1 K74 ubiquitination. Overexpression of MDM2 enhances VC, whereas loss of MDM2 blunts it. Decoy peptide spanning HDAC1 K74 and RG 7112, an MDM2 inhibitor, prevent VC in vivo and in vitro. These results uncover a previously unappreciated ubiquitination pathway and suggest MDM2-mediated HDAC1 ubiquitination as a new therapeutic target in VC.
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