title: [Vitamin D deficiency/insufficiency in patients with chronic kidney disease stage 3 and 4 -- current concept and its therapeutic strategy].
abstract: Vitamin D deficiency/insufficiency, which is clinically represented by low 25(OH)D concentration, is frequently seen in patients with CKD stage 3 and 4. Although its cause is unknown, hypovitaminosis D is partly associated with low 1,25(OH)2D in these patients, possibly leading to advancement of renal osteodystrophy. Recently, in United States, K/DOQI (Kidney disease outcomes quality initiative) guideline indicated that vitamin D deficiency/insufficiency of 25(OH)D concentration less than 30 ng/mL should be treated by supplementation of ergocalciferol. A Japanese guideline to treat vitamin D deficiency/insufficiency should be urgently established.
authors.affiliation: Department of Nephrology, Osaka City University Graduate School of Medicine.
authors.forename: Eiji
authors.initials: E
authors.lastname: Ishimura
authors.forename: Takao
authors.initials: T
authors.lastname: Tsuchida
mesh_terms: D015415:Biomarkers / Q000097:blood; D012080:Chronic Kidney Disease-Mineral and Bone Disorder / Q000209:etiology; D004872:Ergocalciferols / Q000008:administration & dosage; D006801:Humans; D007676:Kidney Failure, Chronic / Q000150:complications*; D017410:Practice Guidelines as Topic; D012720:Severity of Illness Index; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood; D014808:Vitamin D Deficiency / Q000175:diagnosis / Q000188:drug therapy* / Q000209:etiology*
chemical_list: D015415:Biomarkers; D004872:Ergocalciferols; D014807:Vitamin D; C097949:1,25-dihydroxyvitamin D; C104450:25-hydroxyvitamin D