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논문 기본 정보

자료유형
학술저널
저자정보
Yang Sheng (Southern Medical University) Xie JiaJun (Southern Medical University) Pan ZhiJie (Southern Medical University) Guan HongMei (The Third Affiliated Hospital of Guangzhou Medical University) Tu YueSheng (Southern Medical University) Ye YuanJian (Guangdong Medical University) Huang ShouBin (Guangdong Medical University) Fu ShiQiang (Huizhou First Maternal and Child Health Care Hospital) Li KangXian (Southern Medical University) Huang ZhiWei (Southern Medical University) Li XiaoQi (Southern Medical University) Shi ZhanJun (Southern Medical University) Li Le (Southern Medical University) Zhang Yang (Southern Medical University)
저널정보
대한생화학·분자생물학회 Experimental and Molecular Medicine Experimental and Molecular Medicine Vol.56
발행연도
2024.3
수록면
1 - 16 (16page)
DOI
10.1038/s12276-024-01190-6

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The meniscus is vital for maintaining knee homeostasis and function. Meniscal calcification is one of the earliest radiological indicators of knee osteoarthritis (KOA), and meniscal calcification is associated with alterations in biomechanical properties. Meniscal calcification originates from a biochemical process similar to vascular calcification. Advanced glycation end products (AGEs) and their receptors (RAGEs) reportedly play critical roles in vascular calcification. Herein, we investigated whether targeting AGE-RAGE is a potential treatment for meniscal calcification. In our study, we demonstrated that AGE-RAGE promotes the osteogenesis of meniscal cells and exacerbates meniscal calcification. Mechanistically, AGE-RAGE activates mTOR and simultaneously promotes ATF4 accumulation, thereby facilitating the ATF4-mTOR positive feedback loop that enhances the osteogenic capacity of meniscal cells. In this regard, mTOR inhibits ATF4 degradation by reducing its ubiquitination, while ATF4 activates mTOR by increasing arginine uptake. Our findings substantiate the unique role of AGE-RAGE in the meniscus and reveal the role of the ATF4-mTOR positive feedback loop during the osteogenesis of meniscal cells; these results provide potential therapeutic targets for KOA.

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