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  • Title: Serum levels of carboxyterminal propeptide of type I procollagen and pyridinoline crosslinked telopeptide of type I collagen in normal children and children with growth hormone (GH) deficiency during GH therapy.
    Author: Kubo T, Tanaka H, Inoue M, Kanzaki S, Seino Y.
    Journal: Bone; 1995 Oct; 17(4):397-401. PubMed ID: 8573414.
    Abstract:
    In this study, we investigated age-related changes in serum levels of both the carboxyterminal propeptide of type I procollagen (PICP) and the pyridinoline crosslinked telopeptide of type I collagen (ICTP) to elucidate bone formation and resorption, respectively, in 200 normal Japanese children (141 males and 59 females, age range 0-16 years). Furthermore, to clarify the effect of GH on bone turnover, we measured serum PICP and ICTP in 26 growth hormone (GH)-deficient children (20 males and 6 females, age range 4-15 years) who showed significant bone growth during recombinant human GH therapy. In the normal children, the curves for age-related changes in both serum PICP and ICTP levels almost paralleled that of the standard height velocity curve in both sexes. The serum levels of both peptides were higher than those in adults, and the peak increases corresponded with the timing of the adolescent growth spurt. Furthermore, the serum levels of PICP and ICTP were significantly correlated with the height velocity. In the GH-deficient patients, the serum ICTP levels before GH therapy were lower than those in age- and sex-matched controls. Both PICP and ICTP levels in serum increased significantly at the beginning of GH therapy. Furthermore, the percent increase in PICP after 1 month of GH treatment was positively correlated with the percent increase in height velocity during 1 year of GH treatment.(ABSTRACT TRUNCATED AT 250 WORDS)
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