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Dicer1, AGO3, and AGO4 microRNA machinery genes are differentially expressed in developing female reproductive organs and overexpressed in cancerous ovaries of chickens

Authors
Jeong, W.Bae, H.Lim, W.Song, G.
Issue Date
11월-2017
Publisher
AMER SOC ANIMAL SCIENCE
Keywords
AGO3; AGO4; chicken; Dicer1; microRNA; ovarian cancer
Citation
JOURNAL OF ANIMAL SCIENCE, v.95, no.11, pp.4857 - 4868
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF ANIMAL SCIENCE
Volume
95
Number
11
Start Page
4857
End Page
4868
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/81648
DOI
10.2527/jas2017.1846
ISSN
0021-8812
Abstract
MicroRNA (miRNA)-mediated gene silencing is a key mechanism regulating numerous biological processes such as development of organs and tumorigenesis. The expression of miRNA machinery genes linked to miRNA biogenesis and processing is finely regulated. Despite accumulating evidence for chicken miRNA in the female reproduction system, precise regulatory mechanisms are largely unknown. Therefore, the objective of this study was to determine changes in expression levels of miRNA machinery genes in developmental stages of the oviduct and ovarian carcinogenesis of laying hens. In the present study, differential expression of miRNA machinery genes during ovarian carcinogenesis was determined using cancerous and normal ovaries collected from normal laying hens and hens with cancer. Our results showed that 3 miRNA machinery genes (Dicer1, AGO3, and AGO4) were differentially expressed as laying hens' reproductive organs developed. These genes were simultaneously upregulated in cancerous ovaries compared with those in normal ovaries. Their transcripts were abundantly localized in glandular epithelial cells of cancerous ovaries. Our results indicate that Dicer1, AGO3, and AGO4 play critical roles in the development of reproductive organs and ovarian carcinogenesis in laying hens, suggesting that simultaneous overexpression of these genes might serve as a prognostic factor for ovarian cancer.
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