title: Short-term growth and collagen turnover in asthmatic adolescents treated with the inhaled glucocorticoid budesonide.
abstract: Short-term lower leg growth, the insulin-like growth factor axis, and collagen turnover were assessed in 16 adolescents with asthma during treatment with inhaled budesonide, 800 micrograms/d, from a pressurized metered dose inhaler with a volume spacer. The design was a randomized double blind, placebo-controlled two-period crossover trial with treatment periods of 4 weeks and a 1-week wash-out. Lower leg growth was assessed by knemometry. Serum levels of insulin-like growth factor-I, insulin-like growth factor-binding protein-3, and the following markers of collagen turnover were evaluated: Serum markers of type I collagen formation and degradation; the carboxy-terminal propeptide of type I procollagen and the carboxy terminal pyridinoline cross-linked telopeptide of type I procollagen (ICTP), the serum marker of type III collagen formation; the amino-terminal propeptide of type III procollagen (PIIINP) and the urinary concentrations of the type I collagen degradation products pyridinoline (PYD) and deoxypyridinoline (DPD) cross-links. Mean lower leg growth velocity was suppressed from 0.51 mm/week during placebo to 0.18 mm/week during budesonide treatment (p < 0.001). No statistically significant effects on insulin-like growth factor-1, insulin-like growth faster-binding protein-3, or carboxy-terminal propeptide of type I procollagen were observed. ICTP and PIIINP were reduced with 2.3 and 2.5 micrograms/liter (p < 0.001 and p < 0.001, respectively) during budesonide treatment, urinary concentrations of PYD and DPD with 32.9 nmol/mmol creatinine (p < 0.005) and 6.8 nmol/mmol creatinine (p < 0.005), respectively. Significant correlations between lower leg growth velocity and ICTP, PIIINP, PYD, and DPD during placebo (p < 0.01, p < 0.05, p < 0.01, and p < 0.01) and budesonide (p < 0.05, p < 0.05, p < 0.05, and p < 0.05) periods were found. Short term lower leg growth suppression in adolescents treated with inhaled budesonide, 800 micrograms/d, reflects suppression of type I and III collagen turnover.
authors.affiliation: Department of Paediatrics, Aarhus University Hospital, Denmark.
authors.forename: C
authors.initials: C
authors.lastname: Heuck
authors.forename: O D
authors.initials: OD
authors.lastname: Wolthers
authors.forename: M
authors.initials: M
authors.lastname: Hansen
authors.forename: G
authors.initials: G
authors.lastname: Kollerup
mesh_terms: D000287:Administration, Topical; D000293:Adolescent; D000596:Amino Acids / Q000652:urine; D000893:Anti-Inflammatory Agents / Q000009:adverse effects* / Q000627:therapeutic use; D001249:Asthma / Q000188:drug therapy*; D001846:Bone Development; D019819:Budesonide / Q000009:adverse effects* / Q000627:therapeutic use; D002648:Child; D003094:Collagen / Q000097:blood / Q000378:metabolism*; D024042:Collagen Type I; D005260:Female; D005938:Glucocorticoids; D006130:Growth Disorders / Q000139:chemically induced*; D006801:Humans; D007866:Leg; D008297:Male; D010446:Peptide Fragments / Q000097:blood; D010455:Peptides / Q000097:blood; D011347:Procollagen / Q000097:blood
chemical_list: D000596:Amino Acids; D000893:Anti-Inflammatory Agents; D024042:Collagen Type I; D005938:Glucocorticoids; D010446:Peptide Fragments; D010455:Peptides; D011347:Procollagen; C052929:collagen type I trimeric cross-linked peptide; C041876:procollagen Type III-N-terminal peptide; D019819:Budesonide; C015484:pyridinoline; C036020:deoxypyridinoline; D003094:Collagen