[Poor bone quality in diabetes and arterioscelerosis]

Area of Science:

• Biochemistry
• Orthopedics
• Metabolic Diseases

Background:

• Type 1 and Type 2 diabetes negatively impact bone quality.
• Collagen cross-linking is a critical factor in bone's structural integrity.
• Recent research indicates hyperhomocysteinemia also affects bone collagen cross-linking.

Purpose of the Study:

• To review the literature on how diabetes and hyperhomocysteinemia affect bone collagen cross-linking.
• To highlight the role of hyperglycemia, oxidative stress, and hyperhomocysteinemia in collagen cross-link abnormalities.
• To discuss the accumulation of advanced glycation end products (AGEs) in bone.

Main Methods:

• Literature review of studies investigating bone collagen cross-linking in diabetes and hyperhomocysteinemia.
• Analysis of mechanisms including hyperglycemia, oxidative stress, and homocysteine.
• Focus on enzymatic vs. non-enzymatic cross-links, specifically pentosidine.

Main Results:

• Both diabetes and hyperhomocysteinemia are associated with abnormal collagen cross-linking in bone.
• Hyperglycemia, oxidative stress, and hyperhomocysteinemia reduce enzymatic cross-links.
• These conditions promote the accumulation of non-enzymatic cross-links, such as advanced glycation end products (AGEs) like pentosidine.

Conclusions:

• Diabetes and hyperhomocysteinemia are significant factors contributing to detrimental bone collagen cross-linking.
• Altered collagen cross-linking compromises bone quality and may increase fracture susceptibility.
• Understanding these mechanisms is crucial for managing bone health in affected individuals.