Keratinocyte Function in Normal and Diabetic Wounds and Modulation by FOXO1

Area of Science:

• Dermatology
• Endocrinology
• Cell Biology

Background:

• Wound healing involves complex cellular interactions, with keratinocytes critical for reepithelialization and connective tissue repair.
• Keratinocytes produce growth factors like TGF-β, VEGF-A, and CTGF, and antioxidants that support healing.
• Diabetes negatively impacts wound healing by altering keratinocyte function.

Purpose of the Study:

• To review the role of keratinocytes in wound healing.
• To examine factors produced by keratinocytes that promote reepithelialization, connective tissue repair, and angiogenesis.
• To understand how diabetes disrupts these keratinocyte functions.

Main Methods:

• Literature review focusing on keratinocyte biology in wound healing.
• Analysis of molecular mechanisms altered by diabetes, including high glucose and advanced glycation end products.
• Examination of the role of transcription factor FOXO1 in diabetic keratinocyte dysfunction.

Main Results:

• Diabetic conditions disrupt keratinocyte production of essential healing factors.
• Keratinocytes in diabetes switch to a detrimental program, impairing epithelialization and connective tissue repair.
• High glucose and advanced glycation end products alter keratinocyte behavior via FOXO1.

Conclusions:

• Diabetic impairment of keratinocyte function is a key factor in delayed wound healing.
• Understanding these cellular changes is crucial for developing therapeutic strategies.
• Targeting keratinocyte dysfunction may improve wound healing outcomes in diabetic patients.