腎と骨代謝 Vol.18 No.3(7)


特集名 新たなるビタミンDの側面
題名 ビタミンDと生命予後
発刊年月 2005年 07月
著者 庄司 哲雄 大阪市立大学大学院医学研究科代謝内分泌病態内科学
著者 西沢 良記 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 】 腎不全に伴い活性型ビタミンDレベルが低下する.活性型ビタミンDはCa,P,骨代謝以外にもさまざまな病態に関与しうるため,尿毒症は「活性型ビタミンD欠乏症候群」の側面をもつ.ヒトでは活性型ビタミンD投与による左室肥大,左室機能,免疫能,炎症マーカー改善効果が報告され,実験的にも生理的濃度のビタミンDには抗動脈硬化作用がある.透析患者の観察的コホート研究で,活性型ビタミンD投与群は非投与群より心血管系死亡のリスクが低いことが示され,活性型ビタミンDの新たな意義が認識されつつある.
Theme A new aspect of vitamin D
Title Vitamin D and survival of patients with chronic kidney disease
Author Tetsuo Shoji Department of Metabolism, Endocrinology and Molecular Medicine, Osaka City University Graduate School of Medicine
Author Yoshiki Nishizawa Department of Metabolism, Endocrinology and Molecular Medicine, Osaka City University Graduate School of Medicine
[ Summary ] The deficiency of active forms of vitamin D in cases of uremia may explain various abnormalities in biological functions and survival disadvantages in this disease condition, because vitamin D receptors are expressed not only in the classical target organs but also in other non-classical targets including arteries, heart, immune system, endocrine organs, and nervous system. Treatment with vitamin D had beneficial effects on cardiac and immune functions in dialysis patients. We found that patients on a low-dose of oral alfacalcidol showed a significantly lower risk for cardiovascular death than those without vitamin D supplementation. Although these observations need further confirmation by randomized controlled studies, appropriate use of active forms of vitamin D may improve outcomes of patients with chronic kidney disease.
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