Acta Veterinaria et Zootechnica Sinica ›› 2021, Vol. 52 ›› Issue (9): 2609-2616.doi: 10.11843/j.issn.0366-6964.2021.09.024

• BASIC VETERINARY MEDICINE • Previous Articles     Next Articles

Construction and Influence of Beclin-1 Gene shRNA Lentiviral Vector on Autophagy and Virability of B16F10 Cell

JIA Yanyan1,2, ZHAO Yingying1,2, YU Zuhua1,2, HE Lei1,2, LIAO Chengshui1,2, LI Jing1,2, YU Chuan1,2, ZHANG Chunjie1,2*, LI Yinju1,2   

  1. 1. The Key Laboratory of Animal Disease and Public Health/Henan University of Science and Technology, Luoyang 471000, China;
    2. Luoyang Key Laboratory of Live Carrier Biomaterial and Animal Disease Prevention and Control, Luoyang 471000, China
  • Received:2021-04-07 Online:2021-09-23 Published:2021-09-26

Abstract: In this study, we constructed a mouse melanoma cell line B16F10 with stable interference targeting Beclin-1 gene by RNA interference, and to explore autophagy and cell viability, which is the foundation for analysis of the relationship between Beclin-1 gene, autophagy, and tumor. Firstly, we designed the shRNA of mouse Beclin-l and constructed interference vectors. Then we transfected the lentiviral vector into 293T cells to obtain lentiviral particles, and B16F10 cells were infected with lentivirus packaging. To obtain the monoclonal cell line, the transfected cells were selected with the methods of pressurized screening and limited dilution. And then the monoclonal cells were cultured in fed-batch mode for quality evaluation. The interference effect of Beclin-l in the stable cell line was detected by RT-PCR and immunofluorescence technique, the expression of autophagy protein LC3 and the formation of autophagosomes were analyzed by Western blot and transmission electron microscopy, and cell viability were determined by CCK-8 assay. The results showed that the lentiviral vector targeting Beclin-l was successfully constructed, and the titer of lentivirus purified by packaging was 1×108TU·mL-1. Beclin-1 mRNA and protein were inhibited in the stable cell line, and the interference efficiency was around 75% (P<0.01). The results demonstrated that intervention of Beclin-1 expression could inhibit the expression of LC3-Ⅱ protein and the number of autophagosomes, and reduce the viability of B16F10 cells. These data indicated that the silence of Beclin-1 gene could effectively reduce the autophagy intensity and promote cell death in B16F10 cells, which lays the foundation for exploring the function of Beclin-1 gene and the role of autophagy in anti-tumor.

Key words: RNA interference, B16F10 cells, Beclin-1 gene, lentivirial vector, cell autophagy

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