Skin AGEs and diabetic neuropathy

Area of Science:

• Endocrinology and Metabolism
• Biomarker Discovery
• Diabetic Complications Research

Background:

• Advanced glycation end-products (AGEs) form during hyperglycemia and accumulate in tissues.
• Increased AGEs in peripheral nerves are a proposed risk factor for diabetic neuropathy (DN).
• Tissue biopsy is the gold standard for AGE measurement, but non-invasive methods are sought.

Purpose of the Study:

• To critically review the association between skin AGEs measured by sAF and diabetic microvascular complications.
• To emphasize the potential of skin AGEs as early biomarkers for diabetic neuropathy.
• To identify limitations in current knowledge and suggest future research directions.

Main Methods:

• Review of existing scientific literature on skin autofluorescence (sAF) and AGEs.
• Analysis of studies correlating sAF measurements with diabetic neuropathy and other microvascular complications.
• Critical evaluation of the limitations and potential of sAF as a screening tool.

Main Results:

• Skin autofluorescence (sAF) is a fast, simple, and non-invasive method for assessing tissue AGEs.
• sAF demonstrates an acceptable correlation with the gold standard skin biopsy method.
• Accumulation of AGEs measured by sAF independently correlates with diabetic neuropathy and other complications like nephropathy and retinopathy.

Conclusions:

• Skin AGEs, assessed via sAF, show potential as early biomarkers for diabetic neuropathy.
• Further long-term studies are required to establish the clinical utility, patient selection criteria, and cost-effectiveness of sAF screening for DN.