Altered expression of KLC3 may affect semen parameters.

Area of Science:

• Reproductive biology
• Molecular genetics
• Spermatogenesis research

Background:

• Kinesin light-chain C3 (KLC3) protein is crucial for spermatogenesis, particularly in forming the sperm tail's mitochondrial sheath.
• Proper function of the midpiece, supported by KLC3, is vital for sperm motility.

Purpose of the Study:

• To investigate for the first time the differences in KLC3 gene expression between fertile and infertile individuals.
• To explore the association between KLC3 gene expression and sperm parameters.

Main Methods:

• Semen samples from 19 fertile and 57 infertile men were analyzed.
• Computer-assisted sperm analysis was used to assess sperm parameters.
• Quantitative KLC3 gene expression was measured using real-time PCR.

Main Results:

• A significant positive correlation was observed between sperm concentration and KLC3 expression in infertile individuals (r=0.45, p=0.00).
• No significant correlation was found between KLC3 expression and sperm motility.
• Relative KLC3 expression was significantly higher in men with asthenozoospermia compared to those without.

Conclusions:

• Reduced KLC3 expression might impair midpiece function, affecting sperm motility.
• Aberrant KLC3 gene expression is potentially linked to conditions like oligozoospermia and asthenozoospermia.
• This study highlights KLC3 as a potential biomarker in male infertility.