Effects of Diabetes on Bone Material Properties

Area of Science:

• Bone biology
• Diabetic complications
• Biomechanical properties

Background:

• Individuals with type 1 and type 2 diabetes mellitus (T1DM, T2DM) exhibit higher fracture rates than non-diabetic individuals.
• This increased risk is not attributable to differences in bone mineral density (BMD), body mass index (BMI), or fall frequency.
• These observations suggest intrinsic alterations in bone tissue fracture resistance in diabetic patients.

Purpose of the Study:

• To review and synthesize research on the effects of T1DM and T2DM on the compositional and mechanical properties of bone tissue.
• To understand how diabetes influences the intrinsic quality and resilience of bone.

Main Methods:

• Analysis of clinical bone specimens from patients with T1DM and T2DM.
• Examination of bone tissue composition, including mineralization and advanced glycation endproduct (AGE) concentrations.
• Assessment of mechanical properties such as compressive stiffness, strength, and material strength index.

Main Results:

• T2DM bone showed increased mineralization and AGEs, correlating with altered mechanical performance (e.g., increased stiffness, decreased post-yield properties).
• Cortical bone in T2DM patients had reduced indentation resistance, worsening with poorer glycemic control.
• T1DM bone, particularly in patients with prior fractures, exhibited higher mineral and AGE content, indicating stiffer nanoscale properties and potentially reduced remodeling.

Conclusions:

• Diabetes mellitus significantly alters bone tissue composition and mechanical properties, independent of BMD, BMI, or falls.
• Increased mineralization and AGE accumulation in diabetic bone contribute to changes in stiffness, strength, and potentially reduced fracture resistance.
• Further research is needed to fully elucidate the mechanisms linking diabetes to bone fragility.