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Journal of Chinese Pharmaceutical Sciences ›› 2022, Vol. 31 ›› Issue (8): 622-633.DOI: 10.5246/jcps.2022.08.052

• Original articles • Previous Articles     Next Articles

Effects of Polygonum hydropiper on the expressions of inflammatory cytokines and cytochrome P450 enzymes in mice with E. coli-induced diarrhea

Jiahuan Huang#, Ling Yue#, Mingru Zhang, Quan Yang, Xuanxuan Cheng*()   

  1. Key Laboratory of State Administration of Traditional Chinese Medicine for Production & Development of Cantonese Medicinal Materials, Guangzhou Comprehensive Experimental Station of National Industrial Technology System for Chinese Materia Medica, Guangdong Engineering Research Center of Good Agricultural Practice & Comprehensive Development for Cantonese Medicinal Materials, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China
  • Received:2022-01-14 Revised:2022-02-16 Accepted:2022-03-29 Online:2022-09-03 Published:2022-09-03
  • Contact: Xuanxuan Cheng
  • About author:
    # These authors contributed equally to this article.

Abstract:

In the present study, we aimed to investigate the effects of Polygonum hydropiper aqueous extract (PHE) on the expression levels of inflammatory cytokines and cytochrome P450 (CYPs) in mice with E. coli-induced diarrhea. BALB/c mice were randomly divided into the control group, model group, enrofloxacin-treated group, and two PHE-treated groups with different doses. The diarrhea model was established by intraperitoneal injection of enteropathogenic E. coli (EPEC) in mice. The enrofloxacin-treated group was given enrofloxacin at 5 mg/kg by intragastric gavage (i.g.) for 11 d. PHE-treated groups were given PHE at 5 g/kg and 10 g/kg by i.g. for 11 d. The histopathological characteristics of the duodenum and liver were observed by HE staining. The levels of inflammatory cytokines and CYPs in the duodenum and liver of mice were determined by ELISA. The mRNA and protein expressions of CYPs were determined by qRT-PCR and Western blotting analysis, respectively. The results showed that PHE could significantly alleviate the injury of the duodenum and liver induced by EPEC infection, reduce the contents and mRNA expressions of inflammatory cytokines, and regulate the mRNA and protein expressions of the major subtypes of CYPs. These findings indicated that PHE had an apparent therapeutic effect on EPEC-induced diarrhea, and its mechanism might be related to inhibition of inflammatory cytokines and regulation of CYPs.

Key words: Polygonum hydropiper L., Enteropathogenic E. coli, Diarrhea, Inflammatory cytokines, Cytochrome P450

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