Sperm acrosome overgrowth and infertility in mice lacking chromosome 18 pachytene piRNA

piRNAs are small non-coding RNAs required to maintain genome integrity and preserve RNA homeostasis during male gametogenesis. In murine adult testes, the highest levels of piRNAs are present in the pachytene stage of meiosis, but their mode of action and function remain incompletely understood. We...

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Veröffentlicht in:PLoS genetics 2021-04, Vol.17 (4), p.e1009485-e1009485
Hauptverfasser: Choi, Heejin, Wang, Zhengpin, Dean, Jurrien
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description piRNAs are small non-coding RNAs required to maintain genome integrity and preserve RNA homeostasis during male gametogenesis. In murine adult testes, the highest levels of piRNAs are present in the pachytene stage of meiosis, but their mode of action and function remain incompletely understood. We previously reported that BTBD18 binds to 50 pachytene piRNA-producing loci. Here we show that spermatozoa in gene-edited mice lacking a BTBD18 targeted pachytene piRNA cluster on Chr18 have severe sperm head dysmorphology, poor motility, impaired acrosome exocytosis, zona pellucida penetration and are sterile. The mutant phenotype arises from aberrant formation of proacrosomal vesicles, distortion of the trans-Golgi network, and up-regulation of GOLGA2 transcripts and protein associated with acrosome dysgenesis. Collectively, our findings reveal central role of pachytene piRNAs in controlling spermiogenesis and male fertility.
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subjects Acrosome - pathology
Acrosomes
Analysis
Animals
Biology and Life Sciences
Biosynthesis
Chromatin
Chromosome 18
Chromosomes - genetics
CRISPR
Females
Fertility
Gametogenesis
Gene deletion
Genetic aspects
Genomes
Genomics
Growth rate
Histones
Humans
Identification and classification
Infertility
Infertility, Male - genetics
Infertility, Male - pathology
Male
Medicine and Health Sciences
Meiosis - genetics
Mice
MicroRNAs
Molecular modelling
Motility
Pachytene
Pachytene Stage - genetics
Post-transcription
Quality control
RNA
RNA polymerase
RNA, Small Interfering - genetics
Rodents
Sperm
Spermatids
Spermatids - growth & development
Spermatids - pathology
Spermatogenesis
Spermatogenesis - genetics
Spermatozoa - pathology
Spermiogenesis
Testes
Testis - growth & development
Testis - pathology
title Sperm acrosome overgrowth and infertility in mice lacking chromosome 18 pachytene piRNA
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