Acta Veterinaria et Zootechnica Sinica ›› 2020, Vol. 51 ›› Issue (1): 74-82.doi: 10.11843/j.issn.0366-6964.2020.01.009

• ANIMAL BIOTECHNOLOGY AND REPRODUCTION • Previous Articles     Next Articles

Expression and Function Analysis of WNT2 in Ovine Follicular Granulosa Cells

XUE Lina1,2, BI Xilin1, WANG Kai1, DANG Wenqing1, HAN Qi1, LUO Huidi2, CAO Ningxian3, Lü Lihua1*   

  1. 1. College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China;
    2. Institute of Animal Husbandry and Veterinary, Shanxi Academy of Agricultural Sciences, Taiyuan 030032, China;
    3. Livestock Breeding Station of Shanxi Province, Taiyuan 030001, China
  • Received:2019-06-14 Online:2020-01-23 Published:2020-01-17

Abstract: This study aimed to investigate the expression and function of WNT2 in ovine follicular granulosa cells (GCs). In this study, both ovaries of 20 healthy ewes aged 4-6 months were collected and the expression of WNT2 protein in follicles was localized by immunohistochemistry; qRT-PCR and Western blot were used to detect the differences of its expression in follicular granulosa cells at different developmental stages; The Wnt2 expression was silenced in GCs, and the relative expression of Wnt2 gene and the key gene CTNNB1 involved in the classical WNT signaling pathway were analyzed using qRT-PCR technology, and the apoptosis of GCs was detected. The results showed that:1) WNT2 protein was expressed in theca interna cells, granulosa cells and cumulus cells of ovine. 2) The results of qRT-PCR and Western blot were basically consistent, the expression of Wnt2 mRNA and protein in granulosa cells with different sizes were significantly different (P<0.05), and the expression in large follicle granulosa cell was significantly higher than that in medium follicles (P<0.05), and the expression in medium follicle granulosa cell was significantly higher than that in small follicles (P<0.05). 3) After silenced Wnt2 gene, the expressions of Wnt2 and CTNNB1 in Wnt2 siRNA group were significantly lower than those in nonsense sequence siRNA group (NC group) and blank control group (P<0.05), while the percentage of apoptosis in Wnt2 siRNA group was significantly higher than those in the other two groups(P<0.05). In conclusion, WNT2 can improve the biological function of ovaries granulosa cells in sheep by the WNT2/CTNNB1 signal pathway.

Key words: sheep, follicle, granulosa cells, WNT2, Wnt/β-catenin signaling pathway

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