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Potential Use of Chromolaena odorata Linn. Flavonoids against Escherichia coli Induced Diarrhoea in Mice

Potential Use of Chromolaena odorata Linn. Flavonoids against Escherichia coli Induced Diarrhoea in Mice

Chao-Qun Shi1, Hong-Ying Lin1, Jin-Qing Zheng1, Fan Yang1, Kwame Ayisi Lartey1, Dan-Ju Kang1, Hwa-Chian Robert Wang2, Ravi Gooneratne3*and Jin-Jun Chen1*

1Department of Veterinary Medicine, College of Agricultural Sciences, Guangdong Ocean University, Zhanjiang, Guangdong 524088 China
2Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN37996, USA
3Department of Wine, Food and Molecular Biosciences, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, New Zealand
 
Chao-Qun Shi and Hong-Ying Lin contributed equally to this work.

*      Corresponding author: jjchen777@aliyun.com; Ravi.Gooneratne@lincoln.ac.nz

ABSTRACT

Flavonoids are important chemotaxonomic markers for the genus Chromolaena. Chromolaena odorata Linn. (CO) is used in folklore medicines to treat gastrointestinal diseases such as diarrhoea. This study examined the feasibility of total flavonoids from C. odorata (TFCO) as an antibacterial agent in vitro, and the mechanism of action of TFCO in combating Escherichia coli-induced diarrhoea in mice. MBC and MIC values of 0.25 and 0.125 g TFCO/ml showed it was effective as an antibacterial agent against E. coli (CMCC 44752) in vitro. Ninety Kunming mice were randomly divided into five groups of 18 mice per group (1 male: 1 female). The groups were control (saline), negative control (E. coli + 0 mg/kg TFCO), low dose (E. coli + 10 mg/kg TFCO), medium dose (E. coli + 40 mg/kg TFCO), and high dose (E. coli + 160 mg/kg). TFCO was administered by gavage 3 h post intraperitoneal (i.p) E. coli injection. Serum IgM, IgA, IgG, TGF-β1 mRNA expression in duodenal villi, and histopathology of duodenum were also studied. TFCO significantly increased the IgA and IgG concentration (P<0.05), reversed the intestinal mucosal damage caused by E. coli, and increased the relative expression of TGF-β1 mRNA. Therefore, TFCO has potential to improve immune function against E. coli infection, restored the intestinal structure and cured the E. coli-induced diarrhoea in mice.
 

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Pakistan Journal of Zoology

October

Vol. 53, Iss. 5, Pages 1603-2000

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