Programmed cell death 5 (PDCD5) has been associated with human cancers as a regulator of cell death; however, the role of PDCD5 in the endothelium has not been revealed. Thus, we investigated whether PDCD5 regulates protein kinase B (PKB/AKT)-endothelial nitric oxide synthase (eNOS)–dependent signal transduction in the endothelium and affects atherosclerosis. Endothelial-specific PDCD5 knockout mice showed significantly reduced vascular remodeling compared with wild-type (WT) mice after partial carotid ligation. WT PDCD5 competitively inhibited interaction between histone deacetylase 3 (HDAC3) and AKT, but PDCD5L6R, an HDAC3-binding–deficient mutant, did not. Knockdown of PDCD5 accelerated HDAC3–AKT interaction, AKT and eNOS phosphorylation, and nitric oxide (NO) production in human umbilical vein endothelial cells. Moreover, we found that serum PDCD5 levels reflect endothelial NO production and are correlated with diabetes mellitus, high-density lipoprotein cholesterol, and coronary calcium in human samples obtained from the cardiovascular high-risk cohort. Therefore, we conclude that PDCD5 is associated with endothelial dysfunction and may be a novel therapeutic target in atherosclerosis.
|Number of pages||6|
|Journal||Proceedings of the National Academy of Sciences of the United States of America|
|Publication status||Published - 2018 May 1|
Bibliographical noteFunding Information:
ACKNOWLEDGMENTS. We thank Dong-Su Jang for providing illustrations and Changsoo Kim (Yonsei University College of Medicine) for reviewing our statistical analyses. This work was supported by the Basic Science Research Program of the National Research Foundation of Korea, funded by the Korean Government through Grants NRF-2017R1E1A1A01072732, NRF-2015R1A2A1A05000899, and NRF-2011-0030086 to H.-G.Y. and NRF-2015R1A2A2A01007346 to S.P. This work was also supported by the Korean Health Technology R&D Project through the Korean Health Industry Development Institute, funded by the Ministry of Health and Welfare, Republic of Korea (Grants HI13C0715 and HI08C2149, to S.P.).
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