腎と骨代謝 Vol.23 No.1(6)


特集名 生活習慣病と骨折危険性
題名 慢性腎臓病と骨折危険性
発刊年月 2010年 01月
著者 稲葉 雅章 大阪市立大学大学院医学研究科代謝内分泌病態内科学
【 要旨 】 慢性腎臓病(CKD)では,以前から血中リン蓄積に伴う二次性副甲状腺機能亢進症によって腎性骨症が発症し,骨折危険性が増すことがわかっていた.しかし,最近ではCKDに伴う酸化ストレスの増大や栄養障害,筋力低下に伴う転倒危険性の増大も骨折率上昇に寄与していることが明らかとなった.実際,早期CKDにおける骨折率の上昇が報告されるようになってきている.また,血液透析導入の第一の原因疾患である糖尿病性腎症の増加に伴い,CKDと糖尿病が併存することが骨質劣化をさらに加速させる.糖尿病性透析患者では骨量は保持されていても骨折危険性は高い.以上からCKD患者では骨量減少に加えて骨質劣化が進行し,両者が相乗的に作用して骨折危険性が増すと考えられる.
Theme Lifestyle-related diseases and fracture risk
Title Increased risk of bone fractures in chronic kidney disease patients
Author Masaaki Inaba Department of Metabolism, Endocrinology, and Molecular Medicine, Osaka City University Graduate School of Medicine
[ Summary ] Secondary hyperparathyroidism develops in patients with chronic kidney disease (CKD) due mainly to the accumulation of phosphate in the serum, leading to an increased risk of fractures at multiple sites. However, it has been increasingly recognized recently that the prevalence of fractures increases even in the early stages of CKD due mainly to impairment of bone quality, which is caused by several mechanisms including increased oxidative stress, malnutrition, and increased risk for fall due to muscle weakness. The frequent association of diabetes mellitus (DM) with CKD leads to further deterioration of bone quality, as we demonstrated by the increased incidence of DM hemodialysis patients independent of bone mineral density.
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