B Andersson1, D Swolin-Eide2, B Kriström3, L Gelander2,4, P Magnusson5, K Albertsson-Wikland6. 1. Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, SE-405 30, Göteborg, Sweden. bjorn.andersson@medic.gu.se. 2. Göteborg Pediatric Growth Research Center, Department of Pediatrics, Institute of Clinical Sciences, The Sahlgrenska Academy at the University of Gothenburg, Göteborg, Sweden. 3. Institution of Clinical Sciences/Pediatrics, Umeå University, Umeå, Sweden. 4. Angered Hospital, Göteborg, Sweden. 5. Department of Clinical Chemistry and Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden. 6. Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, SE-405 30, Göteborg, Sweden.
Abstract
PURPOSE: This study investigated the relationship between seasonal variations in 25-hydroxyvitamin D (25(OH)D) levels and growth in prepubertal children during both the pretreatment year and the first year of GH treatment. METHODS: The study included 249 short prepubertal children with a broad range of GH secretion, GH(max) during a 24 h profile median 23; range 1-127 mU/L, 191 boys (mean age ± SD, 8.6 ± 2.6 years), 58 girls (7.5 ± 1.9 years) receiving GH treatment (mean 43 µg/kg/day; range 17-99 µg/kg/day). Serum 25(OH)D was measured using an automated IDS-iSYS immunoassay. RESULTS: 25(OH)D levels showed seasonal variation, and decreased significantly during GH treatment. 25(OH)D levels at start and first year reduction in 25(OH)D, correlated (-) with the first year growth response during treatment. The degree of GH secretion capacity within our study population of mainly non-GH deficient children and 25(OH)D sufficient (67 ± 29 nmol/L) had no influence on 25(OH)D levels. Growth during GH treatment were independent of seasonal variations in 25(OH)D. Multiple regression analysis showed that 25(OH)D levels at treatment start, together with auxological data and IGF-binding protein-(3)SDS, explained 61 % of the variation in first year gain in heightSDS. CONCLUSION: 25(OH)D levels were associated with first year growth response to GH and may be a useful contribution to future growth prediction models.
PURPOSE: This study investigated the relationship between seasonal variations in 25-hydroxyvitamin D (25(OH)D) levels and growth in prepubertal children during both the pretreatment year and the first year of GH treatment. METHODS: The study included 249 short prepubertal children with a broad range of GH secretion, GH(max) during a 24 h profile median 23; range 1-127 mU/L, 191 boys (mean age ± SD, 8.6 ± 2.6 years), 58 girls (7.5 ± 1.9 years) receiving GH treatment (mean 43 µg/kg/day; range 17-99 µg/kg/day). Serum 25(OH)D was measured using an automated IDS-iSYS immunoassay. RESULTS: 25(OH)D levels showed seasonal variation, and decreased significantly during GH treatment. 25(OH)D levels at start and first year reduction in 25(OH)D, correlated (-) with the first year growth response during treatment. The degree of GH secretion capacity within our study population of mainly non-GH deficient children and 25(OH)D sufficient (67 ± 29 nmol/L) had no influence on 25(OH)D levels. Growth during GH treatment were independent of seasonal variations in 25(OH)D. Multiple regression analysis showed that 25(OH)D levels at treatment start, together with auxological data and IGF-binding protein-(3)SDS, explained 61 % of the variation in first year gain in heightSDS. CONCLUSION: 25(OH)D levels were associated with first year growth response to GH and may be a useful contribution to future growth prediction models.
Authors: Dana Bailey; David Colantonio; Lianna Kyriakopoulou; Ashley H Cohen; Man Khun Chan; David Armbruster; Khosrow Adeli Journal: Clin Chem Date: 2013-05-01 Impact factor: 8.327
Authors: N M Al-Daghri; N Aljohani; S Rahman; S Sabico; O S Al-Attas; M S Alokail; A Al-Ajlan; G P Chrousos Journal: J Endocrinol Invest Date: 2016-06-16 Impact factor: 4.256