Acta Veterinaria et Zootechnica Sinica ›› 2022, Vol. 53 ›› Issue (12): 4470-4481.doi: 10.11843/j.issn.0366-6964.2022.12.032

• CLINICAL VETERINARY MEDICINE • Previous Articles     Next Articles

The Effects of Thrombospondin 1 on the Biological Characteristics of Canine Mammary Tumor Cells in vitro

WU Juye1,2,3, LU Baochun1,2,3, ZHU Yufan1,2,3, JIA Kun1,2,3*   

  1. 1. College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China;
    2. Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, Guangzhou 510642, China;
    3. Guangdong Pet Engineering Technology Research Center, Guangzhou 510642, China
  • Received:2022-03-16 Online:2022-12-23 Published:2022-12-25

Abstract: The aim of this study was to investigate the effect of Thrombospondin-1 (THBS1) on canine mammary tumor cell CHMp, and to clarify its mechanism of action on the development of canine mammary tumors. THBS1 lentivirus-overexpressing cell lines and THBS1-silencing cell lines were constructed from canine mammary tumor cell CHMp. Then CCK-8 assay, scratch assay, Transwell assay, in situ fluorescence detection and flow cytometry were used to detect the effect of THBS1 on the proliferation, migration, invasion, apoptosis and cell cycle of CHMp cells. Finally, the effect of THBS1 on the expression of apoptosis-related factors (p53, Bcl-2, Bax) in CHMp cells was detected by qRT-PCR and Western blot, and the effect of THBS1 on the apoptosis pathway of CHMp cell was further verified. The results showed that overexpression of THBS1 can effectively enhance the proliferation, migration and invasion of canine mammary tumor cells CHMp, and reduce the number of apoptotic CHMp cells, while THBS1 silencing results in the opposite; Flow cytometry showed that THBS1 could affect the cell cycle distribution of CHMp cells; qRT-PCR and Western blot detection showed that after THBS1 overexpression, the expression levels of p53 and Bcl-2 were significantly increased, and the expression level of Bax was significantly decreased, and the results were the opposite after silencing THBS1. The results showed that abnormal expression of THBS1 could affect the proliferation, migration, invasion and cell cycle of canine mammary tumor cell CHMp. In addition, THBS1 can affect the related pathways of CHMp apoptosis factors by affecting the expression of apoptosis factors p53, Bcl-2 and Bax, and play an important role in canine mammary tumors, thereby affecting the occurrence and development of canine mammary tumors.

Key words: canine mammary tumor, CHMp cells, THBS1, biological properties, cell apoptosis

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