title: Does vitamin D administered to children with asthma treated with inhaled glucocorticoids affect short-term growth or bone turnover?
abstract: Our objective was to assess whether administration of 25-OH-vitamin D to children with asthma treated with inhaled dry-powder budesonide 400 microg daily affects short-term growth or markers of bone turnover. We utilized a randomized, double-blind, two-period crossover trial with run-in and washout periods of 2 weeks and treatment periods of 4 weeks duration. The setting was an Outpatient clinic in a secondary referral center. Subjects included 14 boys and 3 girls with a mean age of 11.7 (range, 6.1-14.4) years. Interventions included 15 microg (600 IU) 25-OH-vitamin D (cholecalciferol) in one tablet ABCDin(R) once daily in the morning. Primary outcome measures were: lower leg growth rate, serum osteocalcin, and serum markers of type I collagen turnover, i.e., the amino terminal propeptide of type I procollagen (PINP), the carboxy terminal propeptide of type I procollagen (PICP) (formation markers), and the carboxy terminal pyridinoline cross-linked telopeptide of type I collagen (ICTP) (degradation markers). Secondary outcome measures were parameters of asthma control and serum 25-OH-vitamin D. Lower leg growth rate was 0.22 mm/week during vitamin D and 0.25 mm/week during placebo treatment (NS). Osteocalcin was 59.9 and 57.8 microg/l during vitamin D and placebo treatment, respectively, PINP 574 and 565 microg/l, PICP 381 and 382 microg/l, and ICTP 11.5 and 11.1 microg/l, respectively (NS). Serum 25-OH-vitamin D was 76.3 nmol/l and 48.2 nmol/l, respectively (P < 0.001). There were no statistically significant differences in measures of pulmonary function. In conclusion, administration of 25-OH-vitamin D does not affect short-term growth or markers of bone turnover in children with asthma treated with inhaled dry-powder budesonide 400 microg daily.
authors.affiliation: Children's Clinic Randers, Randers, Denmark.
authors.forename: Anders J
authors.initials: AJ
authors.lastname: Schou
authors.forename: Carsten
authors.initials: C
authors.lastname: Heuck
authors.forename: Ole D
authors.initials: OD
authors.lastname: Wolthers
mesh_terms: D000280:Administration, Inhalation; D000293:Adolescent; D001249:Asthma / Q000188:drug therapy*; D015415:Biomarkers / Q000097:blood; D001846:Bone Development / Q000187:drug effects*; D001993:Bronchodilator Agents / Q000008:administration & dosage; D019819:Budesonide / Q000008:administration & dosage; D002648:Child; D024042:Collagen Type I; D018592:Cross-Over Studies; D004311:Double-Blind Method; D004359:Drug Therapy, Combination; D005260:Female; D005938:Glucocorticoids / Q000008:administration & dosage*; D006128:Growth / Q000187:drug effects*; D006801:Humans; D007866:Leg / Q000254:growth & development; D008297:Male; D015675:Osteocalcin / Q000097:blood; D010446:Peptide Fragments / Q000097:blood; D010455:Peptides; D011347:Procollagen / Q000097:blood; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood / Q000627:therapeutic use*
chemical_list: D015415:Biomarkers; D001993:Bronchodilator Agents; D024042:Collagen Type I; D005938:Glucocorticoids; D010446:Peptide Fragments; D010455:Peptides; D011347:Procollagen; C052929:collagen type I trimeric cross-linked peptide; C047202:procollagen Type I N-terminal peptide; C042813:procollagen type I carboxy terminal peptide; D015675:Osteocalcin; D014807:Vitamin D; D019819:Budesonide; C104450:25-hydroxyvitamin D