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Active ingredient and mechanistic analysis of traditional Chinese medicine formulas for the prevention and treatment of COVID-19: Insights from bioinformatics and in vitro experiments

Yang et al., Medicine, doi:10.1097/MD.0000000000036238
Dec 2023  
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Quercetin for COVID-19
24th treatment shown to reduce risk in July 2021, now with p = 0.0031 from 11 studies.
No treatment is 100% effective. Protocols combine treatments.
5,100+ studies for 109 treatments. c19early.org
Analysis of TCM treatments for COVID-19 including In Silico and In Vitro analysis of quercetin, a common ingredient in TCM treatments. Results suggest that quercetin may help alleviate COVID-19-associated inflammation by reducing levels of the proinflammatory cytokine IL-6 and increasing levels of the anti-inflammatory cytokine IL-10. Molecular docking analysis indicates that quercetin can directly bind to and modulate IL-6 and IL-10. In TNF-⍺ induced inflammation of cultured lung cells, quercetin treatment prevented increases in IL-6 and enhanced IL-10 levels. These computational predictions and cell culture data indicate that quercetin may help control aberrant inflammatory responses in COVID-19 through effects on key regulatory cytokines.
Bioavailability. Quercetin has low bioavailability and studies typically use advanced formulations to improve bioavailability which may be required to reach therapeutic concentrations.
68 preclinical studies support the efficacy of quercetin for COVID-19:
In Silico studies predict inhibition of SARS-CoV-2, or minimization of side effects, with quercetin or metabolites via binding to the spikeA,6,7,19,21,22,27,35,36,38,39,59,60, MproB,4,6,8,10,12,14,15,17,20,21,27,31,33-35,39,40,42,60,61, RNA-dependent RNA polymeraseC,6,29, PLproD,34,42, ACE2E,19,20,25,34,38,60, TMPRSS2F,19, helicaseG,26,31, endoribonucleaseH,36, NSP16/10I,3, cathepsin LJ,23, Wnt-3K,19, FZDL,19, LRP6M,19, ezrinN,37, ADRPO,35, NRP1P,38, EP300Q,13, PTGS2R,20, HSP90AA1S,13,20, matrix metalloproteinase 9T,28, IL-6U,18,32, IL-10V,18, VEGFAW,32, and RELAX,32 proteins. In Vitro studies demonstrate inhibition of the MproB,12,43,48,56 protein, and inhibition of spike-ACE2 interactionY,44. In Vitro studies demonstrate efficacy in Calu-3Z,47, A549AA,18, HEK293-ACE2+AB,55, Huh-7AC,22, Caco-2AD,46, Vero E6AE,16,39,46, mTECAF,49, and RAW264.7AG,49 cells. Animal studies demonstrate efficacy in K18-hACE2 miceAH,52, db/db miceAI,49,58, BALB/c miceAJ,57, and rats62. Quercetin reduced proinflammatory cytokines and protected lung and kidney tissue against LPS-induced damage in mice57, inhibits LPS-induced cytokine storm by modulating key inflammatory and antioxidant pathways in macrophages2, and inhibits SARS-CoV-2 ORF3a ion channel activity, which contributes to viral pathogenicity and cytotoxicity51.
Yang et al., 1 Dec 2023, peer-reviewed, 4 authors. Contact: liuxl@qlu.edu.cn.
In Vitro studies are an important part of preclinical research, however results may be very different in vivo.
This PaperQuercetinAll
Active ingredient and mechanistic analysis of traditional Chinese medicine formulas for the prevention and treatment of COVID-19: Insights from bioinformatics and in vitro experiments
ME a Jiakai Yang, PhD Qianqian Zhuang, ME a , Chi Zhang, PhD Xinli Liu
Medicine, doi:10.1097/md.0000000000036238
Coronavirus disease 2019 (COVID-19 ) is an acute infectious disease caused by a novel coronavirus. Traditional Chinese medicine (TCM) has been proven to have a potential curative effect on COVID-19. This study preliminarily analyzed the existing TCM prescription's key components and action mechanisms for preventing and treating COVID-19 using bioinformatic and experimental methods. Association and clustering analysis reveals that the "HQ + FF + BZ" drug combination had a strong correlation and confidence in 93 TCM prescriptions and may affect the progression of COVID-19 through inflammatory pathways such as the TNF signaling pathway. Further molecular docking revealed that quercetin has a higher affinity for IL6 and IL10 in the TNF signaling pathway associated with COVID-19. In vitro experiments demonstrated that quercetin could effectively reduce the levels of the inflammatory factor IL-6 and increase the anti-inflammatory factor IL-10, alleviating inflammation impact on cells. Our results provide a new understanding of the molecular mechanism of TCM prevention and treatment of COVID-19, which is helpful to the development of new diagnosis and treatment schemes for COVID-19.
Author contributions Conceptualization: Jiakai Yang. Data curation: Jiakai Yang, Chi Zhang.
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'DOI': '10.1186/s41232-020-00146-3', 'article-title': 'How COVID-19 induces cytokine storm with high mortality.', 'volume': '40', 'author': 'Hojyo', 'year': '2020', 'journal-title': 'Inflamm Regen'}, { 'key': 'R54-20231202', 'doi-asserted-by': 'crossref', 'first-page': '8', 'DOI': '10.1186/s13765-023-00769-3', 'article-title': 'Anti-inflammatory effect of taxifolin in TNF-α/IL-17A/IFN-γ induced ' 'HaCaT human keratinocytes.', 'volume': '66', 'author': 'Eun', 'year': '2023', 'journal-title': 'Appl Biol Chem'}], 'container-title': 'Medicine', 'original-title': [], 'language': 'en', 'link': [ { 'URL': 'https://journals.lww.com/10.1097/MD.0000000000036238', 'content-type': 'unspecified', 'content-version': 'vor', 'intended-application': 'similarity-checking'}], 'deposited': { 'date-parts': [[2023, 12, 2]], 'date-time': '2023-12-02T03:06:42Z', 'timestamp': 1701486402000}, 'score': 1, 'resource': {'primary': {'URL': 'https://journals.lww.com/10.1097/MD.0000000000036238'}}, 'subtitle': [], 'short-title': [], 'issued': {'date-parts': [[2023, 12, 1]]}, 'references-count': 50, 'journal-issue': {'issue': '48', 'published-print': {'date-parts': [[2023]]}}, 'URL': 'http://dx.doi.org/10.1097/MD.0000000000036238', 'relation': {}, 'ISSN': ['0025-7974', '1536-5964'], 'subject': ['General Medicine'], 'published': {'date-parts': [[2023, 12, 1]]}}
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