China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (8): 2368-2377.doi: 10.16431/j.cnki.1671-7236.2020.08.004

• Biotechnology • Previous Articles     Next Articles

Construction of Overexpression Adenovirus Vector and Bioinformatics Analysis of miR-16b in Buffaloes

WANG Lulu, SHEN Penglei, WU Fei, YE Sheng, CHEN Weili, ZHAO Xin, FENG Yun, DENG Yanfei, JIANG Jianrong, SHI Deshun, LU Fenghua   

  1. State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning 530004, China
  • Revised:2020-05-13 Online:2020-08-20 Published:2020-08-15

Abstract: This study was aimed to clone and construct the adenovirus vector of pri-miR-16b gene in buffaloes,meanwhile the bioinformatics analysis of miR-16b and its predicted target genes were carried out to provide a basis for studying its role in oocyte maturation of buffaloes.pri-miR-16b gene was amplified from the ovary genome in buffaloes by RT-PCR,and then the pDC316-mCMV-EGFP-pri-miR-16b plasmid was constructed by homologous recombination.The homology and phylogenetic tree were analyzed and constructed by BLAST program and Mega 7.0,respectively,and the secondary structure of pre-miR-16 were predicted by ViennaRNA Web Services.The constructed vector was packaged with the adenovirus backbone plasmid pBHGloxdelE13cre to obtain the adenoviral particles named Ad-miR-16b,then three times of amplifications were performed and the virus titer was also determined.Ad-miR-16b adenovirus particles infected buffalo cumulus cells,and the expression of miR-16b in cumulus cells was detected by Real-time quantitative PCR.The target genes of miR-16b were predicted by TargetScan,and the KEGG pathway was enriched by the DAVID website for the predicted target genes.The results showed that the pri-miR-16b sequence in buffaloes was successfully cloned,and the sequence similarity with the bovine was found to be 100%.The high homology of pre-miR-16b in buffaloes with other species and the closest relationship with Bos taurus.The ViennaRNA Web Services prediction results showed that the secondary structure of pre-miR-16b had a typical single stem-loop structure,Ad-miR-16b adenoviral particles were obtained with a virus titer of 3.367×1010 GFU/mL.After the cumulus cells were infected,the expression of miR-16b was extremely significantly increased by Real-time quantitative PCR (P<0.01).The KEGG pathway enrichment analysis was conducted on 1 394 target genes predicted by miR-16b,and it was found that miR-16b might play a role in oocyte maturation mainly by regulating 74 signaling pathways such as MAPK,TGF-β and PI3K/AKT in cumulus cells.

Key words: miR-16b; adenovirus; cumulus cells; bioinformatics analysis

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