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Keywords = oogenesis PIWI-interacting RNA

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15 pages, 735 KiB  
Review
piRNA-Mediated Maintenance of Genome Stability in Gametogenesis and Cancer
by Martyna Zawalska and Maciej Tarnowski
Genes 2025, 16(7), 722; https://doi.org/10.3390/genes16070722 - 20 Jun 2025
Viewed by 593
Abstract
Epigenetics and genome science have become central to current molecular biology research. Among the key mechanisms ensuring genomic integrity is the silencing of transposable elements in germline cells, a process essential for fertility in both sexes. A pivotal component of this silencing machinery [...] Read more.
Epigenetics and genome science have become central to current molecular biology research. Among the key mechanisms ensuring genomic integrity is the silencing of transposable elements in germline cells, a process essential for fertility in both sexes. A pivotal component of this silencing machinery involves PIWI-interacting RNAs (piRNAs), a distinct class of small non-coding RNAs that regulate gene expression and suppress transposable elements at both the transcriptional and post-transcriptional levels. piRNAs function in concert with PIWI proteins, whose expression is critical for proper oogenesis, spermatogenesis, and early zygote development. Disruptions in piRNA or PIWI protein pathways not only impair germline function but also contribute to genome instability, unchecked cell proliferation, and aberrant epigenetic modifications, hallmarks of tumorigenesis. Emerging evidence links the dysregulation of the piRNA/PIWI axis to the development and progression of various cancers, including lung and colorectal carcinomas. This review highlights the fundamental roles of piRNAs and PIWI proteins in reproductive biology and their increasingly recognized relevance in cancer biology. Full article
(This article belongs to the Section Molecular Genetics and Genomics)
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