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Title: The nuage mediates retrotransposon silencing in mouse primordial ovarian follicles
Authors: Lim, Ai Khim
Lorthongpanich, Chanchao
Chew, Ting Gang
Tan, Chin Wee Godwin
Shue, Yan Ting
Balu, Sathish
Gounko, Natalia
Kuramochi-Miyagawa, Satomi
Matzuk, Martin M.
Chuma, Shinichiro
Messerschmidt, Daniel M.
Solter, Davor
Knowles, Barbara B.
Keywords: Ovary
Issue Date: 2013
Source: Lim, A. K., Lorthongpanich, C., Chew, T. G., Tan, C. W. G., Shue, Y. T., Balu, S., et al. (2013). The nuage mediates retrotransposon silencing in mouse primordial ovarian follicles. Development, 140, 3819-3825.
Series/Report no.: Development
Abstract: Mobilization of endogenous retrotransposons can destabilize the genome, an imminent danger during epigenetic reprogramming of cells in the germline. The P-element-induced wimpy testis (PIWI)-interacting RNA (piRNA) pathway is known to silence retrotransposons in the mouse testes. Several piRNA pathway components localize to the unique, germline structure known as the nuage. In this study, we surveyed mouse ovaries and found, for the first time, transient appearance of nuage-like structures in oocytes of primordial follicles. Mouse vasa homolog (MVH), Piwi-like 2 (PIWIL2/MILI) and tudor domain-containing 9 (TDRD9) are present in these structures, whereas aggregates of germ cell protein with ankyrin repeats, sterile alpha motif and leucine zipper (GASZ) localize separately in the cytoplasm. Retrotransposons are silenced in primordial ovarian follicles, and de-repressed upon reduction of piRNA expression in Mvh, Mili or Gasz mutants. However, these null-mutant females, unlike their male counterparts, are fertile, uncoupling retrotransposon activation from sterility.
ISSN: 0950-1991
DOI: 10.1242/dev.099184
Schools: School of Biological Sciences 
Rights: © 2013 The Authors (published by The Company of Biologists Ltd.)
Fulltext Permission: none
Fulltext Availability: No Fulltext
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