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  • Title: [Some bone turnover markers in serum of healthy children and adolescents in relation to age and gender].
    Author: Gajewska J, Ambroszkiewicz J, Laskowska-Klita T.
    Journal: Wiad Lek; 2005; 58(9-10):476-80. PubMed ID: 16529055.
    Abstract:
    The purpose of this study was the investigation of serum concentration of serum C-telopeptide of type I collagen (s-CTX) and bone alkaline phosphatase (BALP) in Polish healthy children aged 2-18 years. We studied 141 healthy children (64 girls, 77 boys) divided into 3 age groups of both genders: prebubertal, pubertal and postpubertal. The level of s-CTX was determined by Serum CrossLaps One Step ELISA kit (Osteometer Bio Tech, Denmark) and the activity of BALP was measured using an enzyme immunoassay Alkphase-B kit (Metra Biosystems, USA). We observed that both markers of bone turnover showed sigmoid regression curves with increasing age. The peak values of s-CTX and BALP occurred during puberty in the girls aged 8-13 years (2266 +/- 368 ng/ml; 113.4 +/- 21.9 U/L) and in the boys aged 10-15 years (2139 +/- 489 ng/ml; 117.8 +/- 24.7 U/L). In all children after puberty, we observed a gradual lowering of both markers. However, girls showed decreased postpubertal values of s-CTX and BALP 2-3 years earlier than boys, reflecting the earlier completion of puberty in girls. The correlation between s-CTX and BALP was statistically significant (r = 0.578; p < 0.0001) in tested children. The results of this study will be useful in the diagnosis and monitoring of therapy in bone diseases.
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