title: Treatment of hypophosphataemic vitamin D-resistant rickets with massive doses of 1 alpha-hydroxy-vitamin D3 during childhood.
abstract: Plasma levels of 1,25 dihydroxy-vitamin D (1,25-(OH)2-D) were low in 3 children with hypophosphataemic vitamin D-resistant rickets (HVDRR) during childhood, but increased after very large doses (0.5 to 2 micrograms/kg per day) of 1 alpha-hydroxy-vitamin D (1 alpha-OH-D3). This treatment has two advantages. Firstly, hypercalcaemia is easily controlled by reducing the dose of 1 alpha-OH-D3 because of its short half-life. Secondly, the administration of 1 alpha-OH-D3 to patients with HVDRR can enhance the tubular reabsorption of phosphate, and this seems desirable in treating HVDRR.
mesh_terms: D000293:Adolescent; D002118:Calcium / Q000097:blood; D002648:Child; D002675:Child, Preschool; D004100:Dihydroxycholecalciferols / Q000097:blood; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D006887:Hydroxycholecalciferols / Q000008:administration & dosage / Q000627:therapeutic use*; D007015:Hypophosphatemia, Familial / Q000188:drug therapy* / Q000378:metabolism; D007223:Infant; D008297:Male; D010710:Phosphates / Q000097:blood
chemical_list: D004100:Dihydroxycholecalciferols; D006887:Hydroxycholecalciferols; D010710:Phosphates; D002118:Calcium