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Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
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In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
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In eukaryotic cells, transcripts made by RNA polymerase are modified and processed before exiting the nucleus. Unprocessed RNA is called precursor mRNA or pre-mRNA to distinguish it from mature mRNA.
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Using the E1A Minigene Tool to Study mRNA Splicing Changes
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SRSF2 is required for mRNA splicing during spermatogenesis.

Wen-Long Lei1,2,3, Zongchang Du4, Tie-Gang Meng5

  • 1Guangdong and Shenzhen Key Laboratory of Reproductive Medicine and Genetics, The Center of Reproductive Medicine, Peking University Shenzhen Hospital, 1120 Lianhua Rd, Futian District, Shenzhen, 518000, China.

BMC Biology
|October 22, 2023
PubMed
Summary

Serine/arginine-rich splicing factor 2 (SRSF2) is essential for male fertility and spermatogenesis. Its deletion disrupts germ cell development and meiosis, highlighting SRSF2's critical role in regulating alternative splicing for male reproduction.

Keywords:
Alternative splicingLACE-seqMale infertilitySRSF2Spermatogenesis

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Area of Science:

  • Molecular Biology
  • Reproductive Biology
  • Genetics

Background:

  • RNA splicing is crucial for biological functions, but its role in spermatogenesis remains unclear.
  • Alternative splicing mechanisms during male germ cell development require further investigation.

Purpose of the Study:

  • To investigate the function of Serine/arginine-rich splicing factor 2 (SRSF2) in alternative splicing and male reproduction.
  • To elucidate the mechanisms by which SRSF2 regulates spermatogenesis.

Main Methods:

  • Male germ cell-specific deletion of Srsf2 using Stra8-Cre.
  • RNA sequencing (RNA-seq) and LACE-seq to analyze SRSF2 regulatory networks.
  • Analysis of spermatogenesis, germ cell differentiation, and meiosis.

Main Results:

  • Srsf2 deletion in male germ cells led to complete infertility and defective spermatogenesis.
  • SRSF2 regulates critical events in spermatogenesis, including meiosis, DNA recombination, and chromosome segregation.
  • SRSF2 directly impacts the expression and alternative splicing of key genes like Stra8, Stag3, and Atr.

Conclusions:

  • SRSF2 plays a vital role in spermatogenesis and male fertility through the regulation of alternative splicing.
  • SRSF2 is a critical factor for male reproductive development and function.