SCIENCE@home

Functional genomic analysis identifies miRNA repertoire regulating C. elegans oocyte development

Amanda L. Minogue,M. Tackett,E. Atabakhsh,Genesis Tejada,Swathi Arur

Published 2018 in Nature Communications

ABSTRACT

Oocyte-specific miRNA function remains unclear in mice and worms because loss of Dgcr8 and Dicer from mouse and worm oocytes, respectively, does not yield oogenic defects. These data lead to several models: (a) miRNAs are not generated in oocytes; (b) miRNAs are generated but do not perform an oogenic function; (c) functional oocyte miRNAs are generated in a manner independent of these enzymes. Here, we test these models using a combination of genomic, expression and functional analyses on the C. elegans germline. We identify a repertoire of at least twenty-three miRNAs that accumulate in four spatial domains in oocytes. Genetic tests demonstrate that oocyte-expressed miRNAs regulate key oogenic processes within their respective expression domains. Unexpectedly, we find that over half of the oocyte-expressed miRNAs are generated through an unknown Drosha independent mechanism. Thus, a functional miRNA repertoire generated via Drosha dependent and independent pathways regulates C. elegans oocyte development. Biogenesis and function of miRNAs in somatic cells is well characterized, but their role in the germline has not been established. Here the authors identify and characterize Drosha independent and dependent miRNAs during C. elegans oogenesis, revealing their roles in meiotic progression and oocyte development.

PUBLICATION RECORD

CITATION MAP

EXTRACTION MAP

CLAIMS

  • No claims are published for this paper.

CONCEPTS

  • No concepts are published for this paper.

REFERENCES

Showing 1-43 of 43 references · Page 1 of 1

CITED BY

Showing 1-21 of 21 citing papers · Page 1 of 1