ArticleJournal of animal science2023
Identification and functional characterization of developmental-stage-dependent piRNAs in Tibetan sheep testes.
Article in Journal of animal science, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 8 citations in OpenAlex.
- piRNAs as Potential Regulators of Mammary Gland Development and Pathology in Livestock.Veterinary sciences · 2025Review
- Analysis of the Expression Patterns of piRNAs in Response to Microsporidian Invasion in Midgut of Workers (International journal of molecular sciences · 2025Article
- Differential expression of tRNA-derived small RNAs in Juvenile and adult sheep skin: implications for developmental and immune regulation.BMC genomics · 2025Article
- Transcriptome sequencing of sheep hypothalamic tissue reveals the regulatory role of lncRNA in the mechanism of pubertal estrus initiation.Frontiers in veterinary science · 2025Article
- Single-Cell Transcriptome Sequencing Reveals Molecular Expression Differences and Marker Genes in Testes during the Sexual Maturation of Mongolian Horses.Animals : an open access journal from MDPI · 2024Article
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Authors and funding
9 authors at 1 institution in 1 country.
Funding
Abstract
The core function of the testes is to produce sperms, which is the prerequisite for maintaining male fertility. PIWI-interacting RNAs (piRNAs) are a class of non-coding small RNAs that are mainly enriched in the reproductive organ and play a key role in germ cell development and spermatogenesis. However, the expression and function of piRNAs in the testes of Tibetan sheep, a domestic animal endemic to the Tibetan Plateau, remain unknown. In this study, we evaluated the sequence structure, expression profile, and potential function of piRNAs in testicular tissues from Tibetan sheep at different developmental stages (3 months, 1 year, and 3 years of age, respectively) by small RNA sequencing. Of the identified piRNAs, the sequence lengths of 24-26 nt and 29 nt dominate. Most piRNA sequences begin with uracil and have a distinct ping-pong structure which mainly distributes in exons, repeat regions, introns, and other unannotated regions of the genome. The piRNAs in the repeat region are primarily derived from the retrotransposons: long terminal repeats, long interspersed nuclear elements, and short interspersed elements. These piRNAs constitute 2,568 piRNA clusters, which mainly distribute on chromosomes 1, 2, 3, 5, 11, 13, 14, and 24, and of these clusters, a total of 529 piRNA clusters were differentially expressed in at least two age groups. Most of the piRNAs were expressed in a low abundance in the testes of developing Tibetan sheep. A total of 41,552 and 2,529 differential piRNAs were identified in testes from 3 months vs. 1 year, and 1 year vs. 3 years, respectively, presenting significantly increased abundance for most piRNAs in 1 year and 3 years compared with 3 months. The functional evaluation of the target genes showed that the differential piRNAs are mainly involved in regulating gene expression, transcription, protein modification, and cell development during spermatogenesis and testicular development. In conclusion, this study focused on the sequence structure and expression characteristics of piRNAs in the testis of Tibetan sheep and provided new insights into the functional mechanism of piRNAs in testicular development and spermatogenesis of sheep.
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