Effect of fasting hyperglycemia and insulin resistance on bone turnover markers in children aged 9–11 years

Bilinski, Wojciech J.Department of Orthopaedics and Traumatology, Collegium Medicum, Bydgoszcz, Nicolaus Copernicus University, Torun, Poland; Department of Orthopaedics, KoMed, Poddebickie Health Center, Poddebice, Poland (author)

Aim: Impaired regulation of glucose metabolism in childhood adversely affects bone health. We assessed the effect of fasting hyperglycemia and insulin resistance on bone turnover markers in prepubertal children with normal glycemia (<100 mg/dL) and fasting hyperglycemia (100-125 mg/dL).Methods: Glucose, hemoglobin A1c, IGF-I (insulin-like growth factor I), iP1NP (N-terminal propeptide of type I procollagen), CTX-1 (C-terminal telopeptide of type I collagen) and insulin were measured. Bone turnover index (BTI) and HOMA-IR (homeostasis model assessment) were calculated.Results: Bone resorption marker (CTX) levels were decreased by 26.5% in boys with hyperglycemia, though only 7% in girls. Hyperglycemia had no effect on the bone formation marker iP1NP. IGF-1, the best predictor of bone marker variance accounted for 25% of iP1NP and 5% of CTX variance. Girls presented significantly higher BTI indicating the predominance of bone formation over resorption. Insulin resistance significantly decreased CTX. In girls, HOMA-IR and IGF-1 predicted 15% of CTX variance.Conslusions: Fasting hyperglycemia and insulin resistance in children impact bone turnover suppressing bone resorption. Hyperglycemia decreased resorption, particularly in boys, while suppression of resorption by insulin resistance was more pronounced in girls. We suggest that the progression of disturbances accompanying prediabetes, may interfere with bone modelling and be deleterious to bone quality in later life.

Szternel, LukaszDepartment of Laboratory Medicine Collegium Medicum, Bydgoszcz, Nicolaus Copernicus University, Torun, Poland (author)
Siodmiak, JoannaDepartment of Laboratory Medicine Collegium Medicum, Bydgoszcz, Nicolaus Copernicus University, Torun, Poland (author)
Krintus, MagdalenaDepartment of Laboratory Medicine Collegium Medicum, Bydgoszcz, Nicolaus Copernicus University, Torun, Poland (author)
Paradowski, Przemyslaw T.Umeå universitet,Ortopedi,Department of Orthopaedics and Traumatology, Collegium Medicum, Bydgoszcz, Nicolaus Copernicus University, Torun, Poland; Clinical Epidemiology Unit, Orthopaedics, Department of Clinical Sciences Lund, Lund University, Lund, Sweden(Swepub:umu)prpa0014 (author)
Domagalski, KrzysztofDepartment of Immunology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, Torun, Poland (author)
Sypniewska, GrazynaDepartment of Laboratory Medicine Collegium Medicum, Bydgoszcz, Nicolaus Copernicus University, Torun, Poland (author)
Department of Orthopaedics and Traumatology, Collegium Medicum, Bydgoszcz, Nicolaus Copernicus University, Torun, Poland; Department of Orthopaedics, KoMed, Poddebickie Health Center, Poddebice, PolandDepartment of Laboratory Medicine Collegium Medicum, Bydgoszcz, Nicolaus Copernicus University, Torun, Poland (creator_code:org_t)

By the author/editor: Bilinski, Wojcie ...; Szternel, Lukasz; Siodmiak, Joanna; Krintus, Magdale ...; Paradowski, Prze ...; Domagalski, Krzy ...; show more...; Sypniewska, Graz ...; show less...

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Endocrinology an ...

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