Muscle-Bone Crosstalk and Metabolic Dysregulation in Children and Young People Affected with Type 1 Diabetes:
Rossella Vitale1, Giovanna Linguiti2, Vanja Granberg2
1Pediatric Unit, Department of Precision and Regenerative Medicine and Ionian Area, University of Bari "Aldo Moro", Piazza G. Cesare 11, 70124 Bari, Italy.
Insights
Pediatric type 1 diabetes (T1D) impairs bone and muscle development, increasing fracture risk. Management involves stable blood sugar, exercise, and nutrition to protect the growing musculoskeletal system.
Area of Science:
- Pediatric endocrinology
- Musculoskeletal health
- Metabolic disorders
Background:
- Type 1 diabetes (T1D) in children negatively impacts musculoskeletal development, leading to reduced bone mineral density and muscle function.
- Diabetic bone disease and myopathy are significant complications, increasing fracture risk in pediatric T1D patients.
- Chronic hyperglycemia, insulin deficiency, and glycemic variability disrupt key cellular pathways in bone and muscle.
Purpose of the Study:
- To comprehensively analyze the mechanisms by which T1D affects the pediatric musculoskeletal system.
- To review the evidence linking molecular pathways to bone and muscle complications in pediatric T1D.
- To explore prevention and treatment strategies for T1D-related musculoskeletal issues in children.
Main Methods:
- Review of in vitro studies, animal models, and clinical research in children with T1D.
- Analysis of molecular mechanisms including PI3K-AKT-mTOR signaling, FoxO-driven atrogenes, AGEs, RAGE signaling, oxidative stress, and mitochondrial dysfunction.
- Evaluation of the impact of metabolic control and disease duration on musculoskeletal outcomes.
Main Results:
- T1D disrupts bone and muscle development through hyperglycemia, insulin deficiency, and glycemic variability, suppressing anabolic signaling and activating catabolic pathways.
- Advanced glycation end-products (AGEs), oxidative stress, and inflammation further compromise the bone-muscle unit.
- Poor metabolic control and longer disease duration exacerbate reduced bone mineral density, impaired muscle performance, and increased fracture risk.
Conclusions:
- T1D poses a dual threat to the pediatric musculoskeletal system, affecting both bone and muscle integrity.
- Prevention strategies include tight glycemic control, physical activity, and adequate nutrition.
- Treatment focuses on individualized, supervised exercise-based rehabilitation to maintain skeletal muscle health.
Abstract:
Pediatric type 1 diabetes (T1D) disrupts musculoskeletal development during critical windows of growth, puberty, and peak bone mass accrual. Beyond classic micro- and macrovascular complications, accumulating evidence shows a dual burden of diabetic bone disease-reduced bone mineral density, microarchitectural deterioration, and higher fracture risk-and diabetic myopathy, characterized by loss of muscle mass, diminished strength, and metabolic dysfunction. Mechanistically, chronic hyperglycemia, absolute or functional insulin deficiency, and glycemic variability converge to suppress PI3K-AKT-mTOR signaling, activate FoxO-driven atrogenes (atrogin-1, MuRF1), and impair satellite-cell biology; advanced glycation end-products (AGEs) and RAGE signaling stiffen extracellular matrix and promote low-grade inflammation (IL-6, TNF-α/IKK/NF-κB), while oxidative stress and mitochondrial dysfunction further compromise the bone-muscle unit. In vitro, ex vivo, and human studies consistently link these pathways to lower BMD and trabecular/cortical quality, reduced muscle performance, and increased fractures-associations magnified by poor metabolic control and longer disease duration. Prevention prioritizes tight, stable glycemia, daily physical activity with weight-bearing and progressive resistance training, and optimized nutrition (adequate protein, calcium, vitamin D). Treatment is individualized: supervised exercise-based rehabilitation (including neuromuscular and flexibility training) is the cornerstone of skeletal muscle health. This review provides a comprehensive analysis of the mechanisms underlying the impact of type 1 diabetes on musculoskeletal system. It critically appraises evidence from in vitro studies, animal models, and clinical research in children, it also explores the effects of prevention and treatment.
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