» Articles » PMID: 39356768

Pachytene PiRNAs Control Discrete Meiotic Events During Spermatogenesis and Restrict Gene Expression in Space and Time

Overview
Journal Sci Adv
Specialties Biology
Science
Date 2024 Oct 2
PMID 39356768
Authors
Affiliations
Soon will be listed here.
Abstract

Pachytene piRNAs, a Piwi-interacting RNA subclass in mammals, are hypothesized to regulate non-transposon sequences during spermatogenesis. piRNAs, the 21URNAs, are implicated in regulating coding sequences; the messenger RNA targets and biological processes they control during spermatogenesis are largely unknown. We demonstrate that loss of 21URNAs compromises homolog pairing and makes it permissive for nonhomologous synapsis resulting in defects in crossover formation and chromosome segregation during spermatogenesis. We identify Polo-like kinase 3 (PLK-3), among others, as a 21URNA target. 21URNA activity restricts PLK-3 protein to proliferative cells, and expansion of PLK-3 in pachytene overlaps with the meiotic defects. Removal of results in quantitative genetic suppression of the meiotic defects. One discrete 21URNA inhibits PLK-3 expression in late pachytene cells. Together, these results suggest that the 21URNAs function as pachytene piRNAs during spermatogenesis. We identify their targets and meiotic events and highlight the remarkable intricacy of this multi-effector mechanism during spermatogenesis.

References
1.
Woglar A, Daryabeigi A, Adamo A, Habacher C, Machacek T, La Volpe A . Matefin/SUN-1 phosphorylation is part of a surveillance mechanism to coordinate chromosome synapsis and recombination with meiotic progression and chromosome movement. PLoS Genet. 2013; 9(3):e1003335. PMC: 3591285. DOI: 10.1371/journal.pgen.1003335. View

2.
Czech B, Munafo M, Ciabrelli F, Eastwood E, Fabry M, Kneuss E . piRNA-Guided Genome Defense: From Biogenesis to Silencing. Annu Rev Genet. 2018; 52:131-157. PMC: 10784713. DOI: 10.1146/annurev-genet-120417-031441. View

3.
Bartel D . Metazoan MicroRNAs. Cell. 2018; 173(1):20-51. PMC: 6091663. DOI: 10.1016/j.cell.2018.03.006. View

4.
Gervaise A, Arur S . Spatial and Temporal Analysis of Active ERK in the C. elegans Germline. J Vis Exp. 2016; (117). PMC: 5226324. DOI: 10.3791/54901. View

5.
Kuramochi-Miyagawa S, Kimura T, Ijiri T, Isobe T, Asada N, Fujita Y . Mili, a mammalian member of piwi family gene, is essential for spermatogenesis. Development. 2004; 131(4):839-49. DOI: 10.1242/dev.00973. View