Spermatogenesis Beyond DNA: Integrated RNA Control of the Epitranscriptome and Three-Dimensional Genome Architecture

Area of Science:

• Reproductive Biology
• Molecular Genetics
• Epigenetics

Background:

• Spermatogenesis is essential for male fertility and generational genetic transmission.
• It involves complex differentiation from stem cells to mature sperm.
• RNA-centered regulation, epitranscriptomics, and 3D genome architecture are critical but not fully understood.

Purpose of the Study:

• To synthesize current mechanistic evidence on RNA-centered regulation in spermatogenesis.
• To integrate epitranscriptome and 3D genome architecture roles in germ cell fate.
• To highlight regulatory nodes implicated in male infertility.

Main Methods:

• Critical review and synthesis of recent literature.
• Emphasis on human and primate data.
• Analysis of stage-resolved maps from single-cell and multi-omics technologies.

Main Results:

• A layered regulatory model is supported, involving RNA-binding proteins, RNA modifications, and noncoding RNAs.
• Dynamic chromatin remodeling and 3D genome reconfiguration orchestrate key meiotic and spermiogenesis events.
• Convergent defects in RNA metabolism, piRNA pathways, epigenetics, and nuclear architecture are linked to spermatogenic failure.

Conclusions:

• RNA-centered mechanisms, epitranscriptomics, and 3D genome organization are integral to spermatogenesis.
• Disruptions in these layers contribute to male infertility.
• Further research using spatially informed, stage-specific systems is needed for causal testing and improved molecular phenotyping.