2025-10-20
N-Homocysteinylation of HMGB1/2 Promotes Corpus Cavernosum Endothelial Senescence in Erectile Dysfunction
2025-10-20 • Peng Hu, Sen Fu, Beining Li, Xiaoyu Zhu, Bernard T tu, Chenglin Han, Jiaxin Wang, Wenchao Xu, Xinqi Liu, Shiqing Zhu, Chengwei Wang, Zhiyao Deng, Y...
Homocysteine (Hcy) is an age-related risk factor for erectile dysfunction (ED), with enhanced vascular toxicity in middle-aged and elderly individuals. However, folate-based Hcy-lowering therapies have shown limited efficacy, necessitating a reevaluation of its age-dependent pathogenic mechanism. Here, we demonstrate that senescent endothelial cells exhibit heightened responsiveness of methionyl-tRNA synthetase 1 (MARS1) to Hcy, promoting the production of homocysteine thiolactone (HTL) and widespread N-homocystei…