研究背景
骨质疏松症(osteoporosis,OP)是一种以骨量减少,骨微结构破坏,骨强度降低,从而导致骨的脆性增加和易于发生骨折为特征的疾病。糖皮质激素(glucocorticoid,GC)因具有强大的抗炎、抗免疫和抗休克作用,被广泛应用于器官抑制、自身免疫疾病、炎症及肿瘤治疗等领域。但其导致的主要副作用之一—糖皮质激素性骨质疏松症(glucocorticoid-induced osteoporosis,GIOP),已成为普遍存在的临床问题。GIOP是继发性骨质疏松的首要原因,也是骨质疏松症的第3位原因。GIOP发病机制及其防治也越来越受到关注。长期大剂量使用GC不仅可抑制成骨细胞(osteoblast,OB)增殖,促进其凋亡,减少骨骼中活性成骨细胞成分,导致骨形成下降,还能增加破骨细胞(osteoclast,OC)的数量和活性,促进骨吸收,造成骨量丢失,骨质疏松。研究表明,每日接受7.5mg或者更高剂量的GC治疗3个月以上,超过50%的病人会发生严重的骨丢失,而且GC不仅降低了骨密度(bone mineral density,BMD),更重要的是它能破坏骨超微结构,造成骨强度下降导...
【英文摘要】
Background
Osteoporosis(OP) is considered as dysostosis disorder due to the damage of microstructure of bony tissues, the persistent decreasing of bony matrixes and mineral bones,thinness of sclerotin, the decrease of the number of trabecular bones, and the increase of bony fragility and the risk of fracture. Glucocorticoids(GC) are valuable and indispensable therapeutic agents in the management of many diseases such as asthma, rheumatic diseases, and connective tissue diseases.GC impair the pro...