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Zhang J, Zhu L, Zhou J, Yu Q, Yang G, Zhao K, Luo C, Meng J, Liu J, Yang X. Ubiquitination of ASCL1 mediates CD47 transcriptional activation of the AKT signaling pathway, and glycolysis promotes osteogenic differentiation of hBMSCs. In Vitro Cell Dev Biol Anim 2023; 59:636-648. [PMID: 37783914 PMCID: PMC10567835 DOI: 10.1007/s11626-023-00811-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 09/11/2023] [Indexed: 10/04/2023]
Abstract
Bones are extremely dynamic organs that continually develop and remodel. This process involves changes in numerous gene expressions. hBMSC cells can promote osteogenic differentiation. The purpose of this study was to elucidate the mechanism by which ASCL1 promotes osteogenic differentiation in hBMSC cells while decreasing glycolysis. hBMSCs were induced to differentiate into osteoblasts. The ASCL1 expression level during hBMSC osteogenic differentiation was measured by RT‒qPCR, Western blotting, and immunofluorescence. The differentiation level of osteoblasts was observed after staining with ALP and alizarin red. ChIP-qPCR were used to determine the relationship between ASCL1 and CD47, and the expression of glycolysis-related proteins was detected. Overexpression of ASCL1 was used to determine its impact on osteogenic differentiation. si-USP8 was used to verify the ubiquitination of ASCL1-mediated CD47/AKT pathway's impact on hBMSC glycolysis and osteogenic differentiation. The results showed that the expression of ASCL1 was upregulated after the induction of osteogenic differentiation in hBMSCs. From a functional perspective, knocking down USP8 can promote the ubiquitination of ASCL1, while the osteogenic differentiation ability of hBMSCs was improved after the overexpression of ASCL1, indicating that ASCL1 can promote the osteogenic differentiation of hBMSCs. In addition, USP8 regulates the ubiquitination level of ASCL1 and mediates CD47 transcriptional regulation of the AKT pathway to increase the glycolysis level of hBMSCs and cell osteogenic differentiation. USP8 ubiquitination regulates the level of ASCL1. In addition, ubiquitination of ASCL1 mediates CD47 transcription to activate the AKT signaling pathway and increase hBMSC glycolysis to promote osteogenic differentiation.
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Affiliation(s)
- Jimei Zhang
- Department of Gastroenterology, Chenggong Hospital, Yan an Hospital Affiliated to Kunming Medical University, Kunming, 650505, China
| | - Ling Zhu
- Department of Orthopedics, Chenggong Hospital, Yan an Hospital Affiliated to Kunming Medical University, Kunming, 650505, China
| | - Jianping Zhou
- Department of Orthopedics, Chenggong Hospital, Yan an Hospital Affiliated to Kunming Medical University, Kunming, 650505, China
| | - Qunying Yu
- Department of Obstetrics, The Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, China
| | | | - Ke Zhao
- Department of Orthopedics, Yunnan Pain Disease Hospital, Kunming, 650224, China
| | - Chaoli Luo
- Operating Room, Yunnan Pain Disease Hospital, Kunming, 650224, China
| | - Jianguo Meng
- Department of Orthopedics, Guangnan Hospital of Traditional Chinese Medicine, Yunnan Province, Guangnan, 663300, China
| | - Jing Liu
- Department of Orthopedics, Chenggong Hospital, Yan an Hospital Affiliated to Kunming Medical University, Kunming, 650505, China
| | - Xuming Yang
- Department of Orthopedics, Yan an Hospital Affiliated to Kunming Medical University, Kunming, 650055, China.
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