Fonseca J E
Rheumatology Research Unit, Instituto de Medicina Molecular, Edifício Egas Moniz, Faculdade de Medicina da Universidade de Lisboa, Av. Professor Egas Moniz, 1649-028 Lisboa, Portugal.
Rheumatology (Oxford). 2008 Jul;47 Suppl 4(Suppl 4):iv17-19. doi: 10.1093/rheumatology/ken165.
This review updates our current knowledge on the mechanism of action of strontium ranelate and analyses the way it rebalances bone turnover and how it influences bone biomechanics. Strontium ranelate is able to increase pre-osteoblast replication, osteoblast differentiation, collagen type I synthesis and bone matrix mineralization probably through a calcium-sensing receptor (CaR)-dependent mechanism. Paralleling this anabolic effect there is inhibition of osteoclast differentiation and activity mediated by an increase in osteoprotegerin (OPG) and a decrease in RANK ligand (RANKL). The overall effect is a rebalanced bone turnover in favour of improved bone geometry, cortical thickness, trabecular bone morphology and intrinsic bone tissue quality, which translates into enhanced bone strength.
本综述更新了我们目前关于雷奈酸锶作用机制的知识,并分析了其重新平衡骨转换的方式以及对骨生物力学的影响。雷奈酸锶可能通过钙敏感受体(CaR)依赖性机制增加前成骨细胞复制、成骨细胞分化、I型胶原蛋白合成和骨基质矿化。与这种合成代谢作用同时发生的是,通过骨保护素(OPG)增加和核因子κB受体活化因子配体(RANKL)减少介导破骨细胞分化和活性受到抑制。总体效果是骨转换重新平衡,有利于改善骨几何形态、皮质厚度、小梁骨形态和骨组织内在质量,从而增强骨强度。