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Gao LN, Yan M, Zhou L, Wang J, Sai C, Fu Y, Liu Y, Ding L. Puerarin Alleviates Depression-Like Behavior Induced by High-Fat Diet Combined With Chronic Unpredictable Mild Stress via Repairing TLR4-Induced Inflammatory Damages and Phospholipid Metabolism Disorders. Front Pharmacol 2022; 12:767333. [PMID: 34975477 PMCID: PMC8714847 DOI: 10.3389/fphar.2021.767333] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Accepted: 11/23/2021] [Indexed: 01/01/2023] Open
Abstract
Puerarin has been reported as a potential agent for neuro-inflammatory disorders. However, there have been no reports of using puerarin for the treatment of depression based on Toll-like receptor 4 (TLR4)–mediated inflammatory injury. In this study, we evaluated the protective effects of puerarin on depression-like rats induced by a high-fat diet (HFD) combined with chronic unpredictable mild stress (CUMS). The mechanism was screened by lipidomics and molecular docking and confirmed by in vivo tests. Puerarin treatment significantly improved 1% sucrose preference and ameliorated depression-like behavior in the open-field test. The antidepressive effects of puerarin were associated with decreased pro-inflammatory cytokine production, including interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α), and increased anti-inflammatory cytokine levels (IL-10) in rat hippocampal tissues and plasma. Hematoxylin–eosin (H&E), immunofluorescence staining, and Western blotting results displayed that puerarin alleviated inflammatory injury by suppressing TLR4 expression and by repairing the intestine mucus barrier via enhancing the expression of claudin-1 and occludin. Non-targeted lipidomics analysis showed that the most significantly different metabolites modified by puerarin were phospholipids. Puerarin treatment–altered biomarkers were identified as PC (15:1/20:1), PE (15:1/16:1), and PI (18:2/20:1) in comparison with the HFD/CUMS group. Molecular docking modeling revealed that puerarin could bind with cytosolic phospholipase A2 (cPLA2) and cyclooxygenase-2 (COX-2), which play central roles in TLR4-mediated phospholipid metabolism. In vivo, puerarin treatment decreased the enzyme activities of cPLA2 and COX-2, resulting in lower production of prostaglandin E2 (PGE2) in hippocampal and intestinal tissues. In conclusion, puerarin treatment reverses HFD/CUMS-induced depression-like behavior by inhibiting TLR4-mediated intestine mucus barrier dysfunction and neuro-inflammatory damages via the TLR4/cPLA2/COX-2 pathway.
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Affiliation(s)
- Li-Na Gao
- College of Pharmacy, Jining Medical University, Rizhao, China.,Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China
| | - Maocai Yan
- College of Pharmacy, Jining Medical University, Rizhao, China
| | - Lirun Zhou
- College of Pharmacy, Jining Medical University, Rizhao, China.,Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jian'an Wang
- College of Pharmacy, Jining Medical University, Rizhao, China
| | - Chunmei Sai
- College of Pharmacy, Jining Medical University, Rizhao, China
| | - Yingjie Fu
- College of Pharmacy, Jining Medical University, Rizhao, China
| | - Yang Liu
- College of Pharmacy, Jining Medical University, Rizhao, China
| | - Lin Ding
- College of Pharmacy, Jining Medical University, Rizhao, China
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Affiliation(s)
- Emmanuelle Plaisier
- Department of Nephrology Day Hospital, Tenon Hospital Assistance Publique des Hôpitaux de Paris, Paris, France.,Research Unit UMRS 1155, National Institute of Heath and Medical Research-INSERM, Paris, France.,Sorbonne Université, Paris 06, Paris, France.,Reference Center of Rare disease- idiopathic Nephrotic Syndrome, Paris, France.,European Rare Kidney Disease Reference Network-ERKNet, Heidelberg, Germany
| | - Pierre Ronco
- Department of Nephrology Day Hospital, Tenon Hospital Assistance Publique des Hôpitaux de Paris, Paris, France .,Research Unit UMRS 1155, National Institute of Heath and Medical Research-INSERM, Paris, France .,Sorbonne Université, Paris 06, Paris, France .,Reference Center of Rare disease- idiopathic Nephrotic Syndrome, Paris, France .,European Rare Kidney Disease Reference Network-ERKNet, Heidelberg, Germany
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