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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Genet. | doi: 10.3389/fgene.2019.01010

Genome-wide differential expression profiling of ovarian circRNAs associated with litter size in pigs

Gaoxiao Xu1, 2, Huifang Zhang1, Xiao Li1,  Jianhong Hu1, Gongshe Yang1 and  Shiduo Sun1*
  • 1Northwest A&F University, China
  • 2Nanjing University, China

Circular RNAs (circRNAs) have been emerging as an important regulator in mammalian reproduction via acting as miRNA sponges. However, the circRNAs in porcine ovarian related with litter size remains largely unknown. In this study, porcine ovaries with smaller or larger litter size (SLS or LLS) were subjected to high-throughput RNA-sequencing. In total, 38,722 circRNAs were identified, of which 1,291 circRNAs were commonly expressed in all samples. There were 56 circRNAs significantly down-regulated and 54 circRNAs up-regulated in LLS pig (|log2 (Fold change) |>1, FDR < 0.05). Bioinformatics predicted that most of circRNAs harbored miRNA binding sites, and the expression patterns of circRNAs and their putative binding miRNAs were validated by qPCR. Moreover, the expression of circ-TCP11/miR-183 was significantly reversely correlated and their direct interaction was confirmed by dual-luciferase assay. Our study indicates that circRNAs may play potential effects on modulating porcine litter size.

Keywords: circRNA, Ovary, Litter Size, pig, miRNA

Received: 17 Jun 2019; Accepted: 23 Sep 2019.

Copyright: © 2019 Xu, Zhang, Li, Hu, Yang and Sun. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Mx. Shiduo Sun, Northwest A&F University, Yangling, 712100, Shaanxi Province, China, SSdsm@Tom.com