Telomere shortening may be associated with human keloids

Area of Science:

• Dermatology
• Genetics
• Cell Biology

Background:

• Keloids are benign skin tumors resulting from abnormal wound healing in genetically susceptible individuals.
• Characterized by excessive scar tissue formation, the exact cause and effective treatments for keloids remain unknown.
• Keloid disease exhibits autosomal dominant inheritance with variable penetrance and expression.

Purpose of the Study:

• To investigate telomere length and human telomerase reverse transcriptase (hTERT) expression in keloid tissues.
• To assess the role of reactive oxygen species (ROS) generation in keloid pathophysiology.
• To explore the relationship between telomere shortening, hTERT expression, and oxidative stress in keloids.

Main Methods:

• Tissue samples from 20 keloid patients and 20 healthy donors were analyzed.
• Telomere length was measured using Terminal Restriction Fragment (TRF) analysis and Real-Time PCR.
• Quantitative Real-Time RT-PCR assessed hTERT gene expression, and intracellular ROS generation was quantified.

Main Results:

• Keloid specimens showed a significant 30% reduction in telomere length compared to normal skin.
• Telomerase activity was notably absent in keloid tissues.
• Fibroblast cultures from keloid specimens exhibited increased ROS generation over time compared to normal skin fibroblasts.

Conclusions:

• Telomere shortening is associated with human keloids, similar to its role in other diseases.
• Increased ROS generation in keloid fibroblasts suggests a role for oxidative stress in keloid pathophysiology.
• Oxidative stress may modulate telomere loss in keloids, particularly given the absence of active telomerase to counteract shortening.