| miRNAs (MicroRNAs), known as noncoding and important endogenous factors regulating
the expression protein‐coding genes, are vital regulators in each biological process.
Thus, this study aims to explore the key role of four microRNAs in regulating the
spermatogenesis. To conduct this experiment, 55 infertile and fertile men provided
the study with the sperm and testicular tissue samples. To study the spermatozoa
in terms of the morphology, Diff‐Quick was applied. Then, quantitative real‐time
polymerase chain reaction (RT‐PCR) was conducted on samples. Our data indicated
that in contrast to the miR‐15b, significant increasing of miR‐383 and miR‐122 occurred
in both severe oligoasthenoteratozoospermia (SOAT) and moderate oligoasthenoteratozoospermia
(MOAT) compared to normal sperm group (N). In addition, it
was observed that miR‐15b and miR‐122 increased in patients with nonobstructive
azoospermia (NOA) compared with obstructive azoospermia (OA) group. Expression
levels of target genes including P53, CASPASE‐9 and CYCLIN D1 underwent principle
changes according to miRNAs expression level. Our finding indicated that miRNAs
had essential role in the regulation of spermatogenesis, and their expression altering
was associated with sperm abnormalities. Thus, microRNAs can be introduced
as useful biomarkers to determine male infertility reasons to choose the effective
treatment. |