Role of amino acid metabolism in osteoporosis: Effects on the bone microenvironment and treatment strategies (Review).

Osteoporosis is a metabolic disease characterized by an imbalance in bone remodeling. Its pathogenesis involves a functional imbalance of osteoblasts, osteoclasts and bone marrow mesenchymal stem cells. Amino acid metabolism is a key biochemical process for maintaining biological activities, including protein synthesis, energy supply and signal transduction. Amino acid metabolism affects bone homeostasis by regulating osteocyte function and the bone microenvironment. Branched‑chain amino acid and aromatic amino acid metabolism are involved in the regulation of bone mineral density. The present review demonstrates the mechanism of amino acid metabolism in osteoporosis and its potential therapeutic value. In addition, the present review aimed to summarize the application of Mendelian randomization and metabolomic methods to provide a reference for future research and clinical interventions.