Ras-related (Rab) proteins, integral members of the monomeric G-protein family,
play a pivotal role in regulating intracellular vesicular transport. These
proteins contribute to male reproductive processes, specifically in acrosome
formation, exocytosis, and sperm motility. Although a prior study indicated a
correlation between Rab3A and sperm motility, including motion kinematic
parameters such as mean dance, this association has only been explored within a
limited sample size. Therefore, further verification is required to confirm the
correlation between Rab3A and sperm motility parameters. In the present study,
Rab3A expression, sperm motility, and motion kinematic parameters were analyzed
in 150 boar spermatozoa. Additionally, correlations between Rab3A expression and
sperm kinematic characteristics were evaluated statistically. The results
revealed significant associations between Rab3A protein expression levels and
various motion kinematic parameters. Specifically, Rab3A levels exhibited
positive correlations with average path velocity
(
p
<0.05), mean amplitude of lateral head displacement
(
p
<0.05), and curvilinear velocity
(
p
<0.01). Consequently, it is proposed that Rab3A
protein plays a crucial role in male fertility through its correlation with
sperm kinematic characteristics, making it a potential marker for sperm
motility-related assessments.