Hua-Feng-Dan Alleviates LPS-induced Neuroinflammation by Inhibiting the TLR4/Myd88/NF-κB Pathway: Integrating Network Pharmacology and Experimental Validation


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Abstract

Background:Neuroinflammation is the pathological basis of many neurological diseases, including neurodegenerative diseases and stroke. Hua-Feng-Dan (HFD) is a well-established traditional Chinese medicine that has been used for centuries to treat stroke and various other brain-related ailments.

Objective:Our study aims to elucidate the molecular mechanism by which HFD mitigates neuroinflammation by combining network pharmacology and in vitro experiments.

Methods:TCMSP and SymMap databases were used to extract active compounds and their related targets. The neuroinflammation-related targets were obtained from the GeneCards database. The common targets of HFD and neuroinflammation were used to construct a protein-protein interaction (PPI) network. MCODE plug-in was used to find the hub module genes. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses were used to dissect the hub module genes. The lipopolysaccharide (LPS)-induced BV2 microglial neuroinflammation model was utilized to assess the therapeutic effects of HFD on neuroinflammation. Western blotting analysis was performed to examine the core target proteins in the TLR4/My- D88/NF-κB signaling pathway, potentially implicated in HFD's therapeutic effects on neuroinflammation. Hoechst 33342 staining and JC-1 staining were employed to evaluate neuronal apoptosis.

Results:Through network pharmacology, 73 active compounds were identified, with quercetin, beta-sitosterol, luteolin, and (-)-Epigallocatechin-3-Gallate recognized as important compounds. Meanwhile, 115 common targets of HFD and neuroinflammation were identified, and 61 targets were selected as the hub targets utilizing the MCODE algorithm. The results of in vitro experiments demonstrated that HFD significantly inhibited microglial-mediated neuronal inflammation induced by LPS. Integrating the predictions from network pharmacology with the in vitro experiment results, it was determined that the mechanism of HFD in mitigating neuroinflammation is closely related to the TLR4/MyD88/NF-κB pathway. Furthermore, HFD demonstrated the capacity to shield neurons from apoptosis by curbing the secretion of pro-inflammatory factors subsequent to microglial activation.

Conclusion:The findings demonstrated that HFD had an inhibitory effect on LPS-induced neuroinflammation in microglia and elucidated its underlying mechanism. These findings will offer a theoretical foundation for the clinical utilization of HFD in treating neurodegenerative diseases associated with neuroinflammation.

About the authors

Zehan Zhang

School of Traditional Chinese Medicine, Beijing University of Chinese Medicine

Email: info@benthamscience.net

Yuying Pei

The Center of Health Management,, Yuquan Hospital of Tsinghua University

Email: info@benthamscience.net

Yuxiao Zheng

School of Traditional Chinese Medicine, Beijing University of Chinese Medicine

Email: info@benthamscience.net

Ying Liu

School of Traditional Chinese Medicine, Beijing University of Chinese Medicine

Email: info@benthamscience.net

Yixuan Guo

School of Traditional Chinese Medicine, Beijing University of Chinese Medicine

Email: info@benthamscience.net

Yanhui He

School of Traditional Chinese Medicine, Beijing University of Chinese Medicine

Email: info@benthamscience.net

Fafeng Cheng

School of Traditional Chinese Medicine, Beijing University of Chinese Medicine

Author for correspondence.
Email: info@benthamscience.net

Xueqian Wang

School of Traditional Chinese Medicine, Beijing University of Chinese Medicine

Author for correspondence.
Email: info@benthamscience.net

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