SRSF1-mediated alternative splicing is required for spermatogenesis.

Area of Science:

• Molecular Biology
• Reproductive Biology
• Genetics

Background:

• Alternative splicing (AS) is vital for biological functions.
• AS regulation in spermatogenesis is not well understood.
• SRSF1 is a key splicing factor.

Purpose of the Study:

• Investigate the role of SRSF1 in male reproduction.
• Elucidate the mechanisms by which SRSF1 regulates spermatogenesis.
• Determine SRSF1's impact on alternative splicing during male germ cell development.

Main Methods:

• Conditional knockout of SRSF1 in male germ cells.
• RNA sequencing (RNA-seq) to analyze gene expression and alternative splicing.
• LACE-seq to identify direct targets of SRSF1.

Main Results:

• Male germ cell-specific deletion of SRSF1 resulted in complete infertility.
• SRSF1 deletion significantly impaired spermatogenesis.
• SRSF1 directly impacts alternative splicing of Stra8 and indirectly affects Dazl, Dmc1, Mre11a, Syce2, and Rif1.

Conclusions:

• SRSF1 is essential for male fertility and spermatogenesis.
• SRSF1 regulates male reproduction through controlling alternative splicing.
• Targeted manipulation of SRSF1 offers potential insights into male infertility treatments.