PMID- 36705791 OWN - NLM STAT- MEDLINE DCOM- 20230330 LR - 20230705 IS - 1573-4978 (Electronic) IS - 0301-4851 (Linking) VI - 50 IP - 4 DP - 2023 Apr TI - KAP1 modulates osteogenic differentiation via the ERK/Runx2 cascade in vascular smooth muscle cells. PG - 3217-3228 LID - 10.1007/s11033-022-08225-z [doi] AB - BACKGROUND: Osteoblast phenotypic transition in vascular smooth muscle cells (VSMCs) has been unveiled as a common cause of vascular calcification (VC). Kruppel-Associated Box (KRAB)-Associated Protein 1(KAP1) is a transcriptional corepressor that modulates various intracellular pathological processes from gene expression to DNA repair to signal transduction. However, the function and mechanism of KAP1 on the osteoblastic differentiation of VSMCs have not been evaluated yet. METHODS AND RESULTS: We demonstrate that the expression of KAP1 in VSMCs is significantly enhanced in vivo and in vitro calcification models. Downregulating the expression of KAP1 suppresses the osteoblast phenotypic transition of VSMCs, which is indicated by a decrease in the expression of osteoblast marker collagenase type I (COL I) and an increase in the expression of VSMC marker alpha-smooth muscle actin (alpha-SMA). Conversely, exogenous overexpression of KAP1 could promote osteoblast phenotypic transition of VSMCs. Moreover, KAP1 upregulated the expression of RUNX family transcription factor 2 (Runx2), an inducer of osteoblast that positively regulates many osteoblast-related genes, such as COL I. Evaluation of the potential mechanism demonstrated that KAP1 promoted osteoblast phenotypic transition of VSMCs by activating the extracellular regulated protein kinases (ERK) signaling pathway, which could activate Runx2. In support of this finding, KAP1-induced cell osteoblast phenotypic transition is abolished by treatment with PD0325901, a specific ERK inhibitor. CONCLUSIONS: The present study suggested that KAP1 participated in the osteoblast differentiation of VSMCs via the ERK/Runx2 cascade and served as a potential diagnostics and therapeutics target for vascular calcification. CI - (c) 2023. The Author(s), under exclusive licence to Springer Nature B.V. FAU - Bai, Weiwei AU - Bai W AD - Department of Nephrology, The Fourth Hospital of Hebei Medical University, Hebei Clinical Research Center for Chronic Kidney Disease, Hebei Key Laboratory of Vascular Calcification in Kidney Disease, Shijiazhuang, P.R. China. FAU - Cheng, Meijuan AU - Cheng M AD - Department of Nephrology, The Fourth Hospital of Hebei Medical University, Hebei Clinical Research Center for Chronic Kidney Disease, Hebei Key Laboratory of Vascular Calcification in Kidney Disease, Shijiazhuang, P.R. China. FAU - Jin, Jingjing AU - Jin J AD - Department of Nephrology, The Fourth Hospital of Hebei Medical University, Hebei Clinical Research Center for Chronic Kidney Disease, Hebei Key Laboratory of Vascular Calcification in Kidney Disease, Shijiazhuang, P.R. China. FAU - Zhang, Dongxue AU - Zhang D AD - Department of Nephrology, The Fourth Hospital of Hebei Medical University, Hebei Clinical Research Center for Chronic Kidney Disease, Hebei Key Laboratory of Vascular Calcification in Kidney Disease, Shijiazhuang, P.R. China. FAU - Li, Lanmei AU - Li L AD - Department of Nephrology, The Fourth Hospital of Hebei Medical University, Hebei Clinical Research Center for Chronic Kidney Disease, Hebei Key Laboratory of Vascular Calcification in Kidney Disease, Shijiazhuang, P.R. China. FAU - Bai, Yaling AU - Bai Y AD - Department of Nephrology, The Fourth Hospital of Hebei Medical University, Hebei Clinical Research Center for Chronic Kidney Disease, Hebei Key Laboratory of Vascular Calcification in Kidney Disease, Shijiazhuang, P.R. China. FAU - Xu, Jinsheng AU - Xu J AD - Department of Nephrology, The Fourth Hospital of Hebei Medical University, Hebei Clinical Research Center for Chronic Kidney Disease, Hebei Key Laboratory of Vascular Calcification in Kidney Disease, Shijiazhuang, P.R. China. xjs5766@126.com. LA - eng GR - 20377704D/Hebei Province Key Research and Development Project/ PT - Journal Article DEP - 20230127 PL - Netherlands TA - Mol Biol Rep JT - Molecular biology reports JID - 0403234 RN - 0 (Core Binding Factor Alpha 1 Subunit) RN - 0 (RUNX2 protein, human) RN - 0 (Cytoskeletal Proteins) SB - IM EIN - Mol Biol Rep. 2023 Jul;50(7):6305. PMID: 37233915 EIN - Mol Biol Rep. 2023 Sep;50(9):7949. PMID: 37402068 MH - Humans MH - Cell Differentiation MH - Cells, Cultured MH - Core Binding Factor Alpha 1 Subunit/genetics/metabolism MH - Muscle, Smooth, Vascular/metabolism MH - Myocytes, Smooth Muscle/metabolism MH - *Osteogenesis/genetics MH - Signal Transduction MH - *Vascular Calcification/metabolism MH - Cytoskeletal Proteins/metabolism MH - MAP Kinase Signaling System OTO - NOTNLM OT - ERK OT - KAP1 OT - Osteoblast differentiation OT - Runx2 OT - Vascular calcification EDAT- 2023/01/28 06:00 MHDA- 2023/03/29 06:05 CRDT- 2023/01/27 11:27 PHST- 2022/11/08 00:00 [received] PHST- 2022/12/20 00:00 [accepted] PHST- 2023/03/29 06:05 [medline] PHST- 2023/01/28 06:00 [pubmed] PHST- 2023/01/27 11:27 [entrez] AID - 10.1007/s11033-022-08225-z [pii] AID - 10.1007/s11033-022-08225-z [doi] PST - ppublish SO - Mol Biol Rep. 2023 Apr;50(4):3217-3228. doi: 10.1007/s11033-022-08225-z. Epub 2023 Jan 27.