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Preclinical evidence for quercetin against inflammatory bowel disease: a meta-analysis and systematic review

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Abstract

Background

Inflammatory bowel disease (IBD) is a chronic, potentially cancerous disease with limited treatment options. Quercetin may be a novel treatment for IBD. However, its efficacy and safety are unknown. Our goal was to conduct a systematic evaluation to summarize the preclinical effects of quercetin, which may help guide future studies.

Methods

The literature was drawn from three English databases (PubMed, Embase, and Web of Science), and the quality of the included literature was assessed using the SYRCLE list (10 items). The meta-analysis was performed using STATA 15.1 software.

Results

A total of 11 animal studies with 199 animals were involved. The current meta-analysis showed that quercetin could reduce histological score (HS), Disease Activity Index (DAI), interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), nitric oxide(NO), malondialdehyde (MDA), myeloperoxidase (MPO) activity and increase colon length (CL), weight change degree (WCD), interleukin-10 (IL-10), glutathione (GSH), superoxide dismutase (SOD) activity and catalase (CAT) activity, which may involve anti-inflammatory, anti-oxidative stress, cytoprotective, barrier protection, flora regulation.

Conclusions

In conclusion, preclinical evidence suggests that quercetin is an ideal agent for IBD treatment. However, the validity of the findings may be compromised by the low methodological quality and the small number of studies included. There may be some discrepancies between the results of the current analysis and the real situation. More rigorous experimental designs and more comprehensive studies are needed to test the protection of quercetin against IBD.

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Availability of data and materials

The raw data used in the study are included in the article and further inquiries can be made by contacting the first author or corresponding author.

Abbreviations

CAT:

Catalase

CL:

Colon length

DAI:

Disease Activity Index

GSH:

Glutathione

HS:

Histological score

HO-1:

Heme oxygenase-1

IL-1β:

Interleukin-1β

IL-10:

Interleukin-10

MDA:

Malondialdehyde

MPO:

Myeloperoxidase

NO:

Nitric oxide

SOD:

Superoxide dismutase

TNF-α:

Tumor necrosis factor-α

TNBS:

Trinitrobenzene sulfonic acid

WCD:

Weight change degree

References

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Acknowledgements

The authors thank Chengdu University of Traditional Chinese Medicine for providing a research platform and contributing to this study. Thanks to Yi Zhang and Yi Yang for their assistance in this study.

Funding

This work was supported by the National Natural Science Foundation of China (grant no. 82074397), and the “Hundred Talents Program” of the Hospital of Chengdu University of Traditional Chinese Medicine (grant no. 21-Y17).

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Authors and Affiliations

Authors

Contributions

Maoyuan Zhao and Shuangyuan Hu contributed to the manuscript drafting. Pengfei Wei and Wei Li formulated the search strategy and searched the databases. Qingsong Liu and Shuanglan Chen screened the articles and extracted the data. Maoyuan Zhao interpreted the data, and processed the pictures and tables in the manuscript. Xiao Ma, Jinhao Zeng and Jianyuan Tang provided constructive comments and revised the manuscript.

Corresponding authors

Correspondence to Jinhao Zeng, Xiao Ma or Jianyuan Tang.

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Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Ethics approval

As this study was based solely on the summary results of previously published articles, neither ethical approval nor participant consent was required. No individual patient data were obtained or accessed.

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Hu, S., Zhao, M., Li, W. et al. Preclinical evidence for quercetin against inflammatory bowel disease: a meta-analysis and systematic review. Inflammopharmacol 30, 2035–2050 (2022). https://doi.org/10.1007/s10787-022-01079-8

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  • DOI: https://doi.org/10.1007/s10787-022-01079-8

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