The COL5A1 Gene Allelic Combination and ACL Injury Risk in Team Sport: A Preliminary Report

Area of Science:

• Genetics
• Sports Medicine
• Orthopedics

Background:

• Anterior cruciate ligament (ACL) rupture is a common injury in competitive team-sport athletes.
• Genetic factors are increasingly recognized as potential contributors to ACL injury risk.
• The COL5A1 gene, encoding a component of type V collagen, is a candidate gene for ligamentous injuries.

Purpose of the Study:

• To investigate the association between specific COL5A1 gene polymorphisms (BstUI RFLP C/T (rs 12722) and DpnII RFLP B1/B2 (rs 13946)) and the risk of ACL rupture in competitive team-sport athletes.

Main Methods:

• Genomic DNA was extracted from buccal swabs of 68 athletes with ACL rupture and 42 healthy controls.
• Genotyping for rs 12722 and rs 13946 polymorphisms was performed using polymerase chain reaction (PCR) and restriction enzyme analysis.
• Statistical analysis compared genotype frequencies between the ACL rupture and control groups.

Main Results:

• No significant differences were observed in age, height, weight, BMI, or weekly sport practice between groups.
• The control group had significantly longer sport careers (p < 0.005).
• The COL5A1 BstUI RFLP C/C genotype frequency was lower in the ACL rupture group (p=0.001). Combined CC and B1B1 genotypes demonstrated a protective effect against ACL rupture (OR=5).

Conclusions:

• The COL5A1 gene, specifically certain genotypes, may play a role in the genetic predisposition to anterior cruciate ligament rupture in team-sport athletes.
• These findings suggest COL5A1 polymorphisms could be a contributing genetic factor for ACL injuries.
• Further research is warranted to elucidate the precise mechanisms.