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MicroRNA-122 influences the development of sperm abnormalities from human induced pluripotent stem cells by

Te Liu1, Yongyi Huang, Jianjun Liu

  • 1International Peace Maternity and Child Health Hospital, Shanghai Jiaotong University, Shanghai, China. liute79@yahoo.com

Stem Cells and Development
|January 19, 2013
PubMed

Insights

MicroRNA-122 (miR-122) plays a role in male infertility by affecting sperm development. This study shows miR-122 influences sperm cell differentiation and protein expression, potentially impacting fertility.

Area of Science:

  • Reproductive Biology
  • Molecular Biology
  • Stem Cell Research

Background:

  • Sperm abnormalities contribute significantly to male infertility, but their underlying causes are not fully understood.
  • The involvement of microRNAs, such as miR-122, in the pathogenesis of sperm abnormalities remains unexplored.

Purpose of the Study:

  • To investigate the impact of miR-122 expression on the in vitro differentiation of human induced pluripotent stem cells into spermatozoa-like cells.
  • To explore the potential role of miR-122 in male infertility through its influence on sperm development.

Main Methods:

  • Utilized human induced pluripotent stem cells for in vitro differentiation into spermatozoa-like cells.
  • Transfected cells with either normal miR-122 or a mutant form to assess differential effects.
  • Employed flow cytometry to analyze DNA content and high-throughput quantitative proteomics (isobaric tags for relative and absolute quantification) to compare protein expression profiles.

Main Results:

  • Mutant miR-122 transfection led to the formation of spermatozoa-like cells with a significantly increased haploid cell population compared to normal miR-122.
  • Elevated levels of TNP2 and protamine mRNA and protein were observed in mutant miR-122-transfected cells.
  • Proteomic analysis revealed significant differences in the expression of lipoproteins, including APOB and APOA1, between the two groups.

Conclusions:

  • miR-122 expression is linked to abnormal sperm development, suggesting its critical role in male reproductive health.
  • miR-122 may regulate spermatozoa-like cell development by suppressing TNP2 expression and affecting proteins involved in sperm formation.

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