Projects per year
Abstract
We identified a non-synonymous mutation in Oas2 (I405N), a sensor of viral double-stranded RNA, from an ENU-mutagenesis screen designed to discover new genes involved in mammary development. The mutation caused post-partum failure of lactation in healthy mice with otherwise normally developed mammary glands, characterized by greatly reduced milk protein synthesis coupled with epithelial cell death, inhibition of proliferation and a robust interferon response. Expression of mutant but not wild type Oas2 in cultured HC-11 or T47D mammary cells recapitulated the phenotypic and transcriptional effects observed in the mouse. The mutation activates the OAS2 pathway, demonstrated by a 34-fold increase in RNase L activity, and its effects were dependent on expression of RNase L and IRF7, proximal and distal pathway members. This is the first report of a viral recognition pathway regulating lactation.
| Original language | English |
|---|---|
| Article number | e1007072 |
| Number of pages | 24 |
| Journal | PLoS Genetics |
| Volume | 13 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 1 Nov 2017 |
Keywords
- ribonucleases
- mammary glands
- lactation
- gene expression
- milk
- small interfering RNAs
- mastitis
- epithelial cells
Projects
- 2 Finished
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GGN as a regulator of DNA double strand break repair and genome integrity
O'Bryan, M. (Primary Chief Investigator (PCI)), Jamsai, D. (Chief Investigator (CI)), Ormandy, C. J. (Chief Investigator (CI)) & Handel, M. A. (Partner Investigator (PI))
ARC - Australian Research Council
4/01/11 → 31/12/13
Project: Research
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NHMRC Research Fellowship
O'Bryan, M. (Primary Chief Investigator (PCI))
NHMRC - National Health and Medical Research Council (Australia)
1/01/06 → 31/12/18
Project: Research