Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (6): 3002-3013.doi: 10.11843/j.issn.0366-6964.2025.06.042

• Clinical Veterinary Medicine • Previous Articles     Next Articles

Mechanistic Studies on the Inhibition of Malignant Biological Behavior of Canine Osteosarcoma Cells by Gambogenic Acid Regulated Glycogen Metabolism Pathway

KANG Huijie1(), SHA Jichen1, YANG Tianyuan1, ZHANG Yuntong1, HOU Xiaoyu1, LI Siyao1, WANG Weiqian1, HOU Qingdian1, ZHANG Shuai1, YANG Haotian1,2, ZHAO Yuan1,*(), FAN Honggang1,*()   

  1. 1. College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
    2. Animal Husbandryand Veterinary Branch of Heilongjiang Academy of Agricultural Sciences, Qiqihar 161005, China
  • Received:2024-07-31 Online:2025-06-23 Published:2025-06-25
  • Contact: ZHAO Yuan, FAN Honggang E-mail:hj_kang8436@163.com;16645266261@163.com;fanhonggang2002@163.com

Abstract:

This study investigated the role and mechanism of Gambogenic acid (GNA) in inhibiting the malignant biological behavior of canine osteosarcoma (OS) cells based on tumor cell glycogen metabolism pathway. We used the Mckinely canine OS cell line to determine the dosage of GNA by CCK-8 assay; to investigate the inhibitory effect of GNA on the proliferation of canine OS cells by plate cloning assay; to investigate the inhibitory effect of GNA on the migration and invasion of canine OS cells by scratch healing assay, Transwell assay and Western blot assay; to investigate the effect of GNA on the pathway of glycogen metabolism of canine OS by Glycogen Metabolite Kit, Enzyme activity kit, RT-PCR and Western blot assays to investigate the effect of GNA on the glycogen metabolism pathway of canine OS. The CCK-8 assay was used to determine the doses required for subsequent cell experiments, with low dose of 0.24 μmol·L-1, medium dose of 0.28 μmol·L-1 and high dose of 0.32 μmol·L-1; the results of the experiments related to the malignant biological behaviors of the cells showed that GNA significantly inhibited the proliferation, migration and invasive behaviors of the canine OS in a dose-dependent manner (P < 0.05); the results of the Western blot assay showed that GNA significantly inhibited Vimentin, MMP-9 and Snail protein expression in a dose-dependent manner (P < 0.05); Glycogen metabolism assay showed that GNA significantly promoted glucose uptake and increased intracellular glycogen content in canine OS cells, and significantly inhibited GPa enzyme activity; RT-PCR results showed that GNA significantly promoted the expression of GLUT1 in canine OS cells (P < 0.05); and the results of Western blot assay showed that GNA significantly inhibited GLUT1 expression in canine OS cells (P < 0.05), but had no significant effect on the expression of HK2 and PYGL in canine OS cells (P>0.05); the results of Western blot assay were basically the same as those of RT-PCR; the results of cellular immunofluorescence assay showed that GNA inhibited the entry of PYGL into the nucleus, and the average fluorescence intensity of PYGL was gradually decreased with the increase of the concentration of GNA (P < 0.05). GNA inhibited proliferation, migration and invasion of Mckinely canine OS cells and was associated with inhibition of the PYGL-mediated glycogenolysis pathway.

Key words: canine osteosarcoma, gambogenic acid, glycogen, malignant biological behavior

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