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Lin W, Gu B, Gu Y, Zhao R, Huang Y, Fan R, Rong W, Liu Z. Taraxasterol protects against acetaminophen-induced hepatotoxicity by reducing liver inflammatory response and ameliorating oxidative stress in mice. Int Immunopharmacol 2024; 138:112580. [PMID: 38943970 DOI: 10.1016/j.intimp.2024.112580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Revised: 06/10/2024] [Accepted: 06/25/2024] [Indexed: 07/01/2024]
Abstract
Acute liver failure is mainly caused by the overdose of acetaminophen (APAP) globally. The traditional Chinese medicinal (TCM) herb, Taraxacum, contains Taraxasterol (TAX) as one of the active components. It is a pentacyclic-triterpene compound isolated from this herb. Present work aimed to investigate the in vitro and in vivo protection effect of TAX in APAP-induced acute liver injury, and determine the potential regulatory mechamisms. The liver injury caused by APAP is attenuated by TAX, as shown by the alleviated pathological changes of mice liver and the reduced serological indexes. TAX evidently controlled the oxidative stress and liver inflammation in mice liver. In vitro studies found that TAX reversed the decrease in LO2 cell viability induced by APAP, and protected LO2 cells from APAP-induced injury. In addition, TAX reduced the secretion of inflammatory factors in RAW264.7 macrophages as induced via APAP. Besides, TAX inhibited oxidative stress in LO2 cells induced by APAP in vitro. Noteworthy, TAX enhanced protein and mRNA expressions of Nrf2 in vivo, and knockdown of Nrf2 by using adeno-associated virus (AAV)-Nrf2-KO attenuated inhibitory impact of TAX in acute liver injury induced by APAP. Also, AAV-NRF2-KO weakened the inhibitory impact of TAX against APAP-triggered liver inflammation and oxidative stress of mice liver. Moreover, TAX activated the Nrf2 signaling in APAP-induced LO2 cells, as shown by the increased nuclear Nrf2 expression together with downstream HO-1 expression in vitro. Inhibition of Nrf2 by using ML-385, anNrf2inhibitor, weakened the inhibitory effect of TAX against APAP-induced oxidative stress and cell injury in LO2 cells. Moreover, inhibition of Nrf2 attenuated anti-inflammatory effect of TAX for APAP-induced RAW264.7 cells. Collectively, TAX could protect against APAP-triggered hepatotoxicitythrough suppression of liver oxidative stress and inflammatory response in mice.
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Affiliation(s)
- Weiling Lin
- School of Pharmacy, Nantong University, Nantong 226019, China
| | - Bangjie Gu
- School of Pharmacy, Nantong University, Nantong 226019, China
| | - Yuanyuan Gu
- School of Pharmacy, Nantong University, Nantong 226019, China
| | - Rui Zhao
- School of Pharmacy, Nantong University, Nantong 226019, China
| | - Yumeng Huang
- School of Pharmacy, Nantong University, Nantong 226019, China
| | - Rui Fan
- School of Pharmacy, Nantong University, Nantong 226019, China
| | - Weihao Rong
- Department of Orthopedics, Nanjing Lishui District Hospital of Traditional Chinese Medicine, Nanjing 211299, Jiangsu, China.
| | - Zhaoguo Liu
- School of Pharmacy, Nantong University, Nantong 226019, China.
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2
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Zhu X, Du L, Zhang L, Ding L, Xu W, Lin X. The critical role of toll-like receptor 4 in bone remodeling of osteoporosis: from inflammation recognition to immunity. Front Immunol 2024; 15:1333086. [PMID: 38504994 PMCID: PMC10948547 DOI: 10.3389/fimmu.2024.1333086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Accepted: 02/20/2024] [Indexed: 03/21/2024] Open
Abstract
Osteoporosis is a common chronic metabolic bone disorder. Recently, increasing numbers of studies have demonstrated that Toll-like receptor 4 (TLR4, a receptor located on the surface of osteoclasts and osteoblasts) plays a pivotal role in the development of osteoporosis. Herein, we performed a comprehensive review to summarize the findings from the relevant studies within this topic. Clinical data showed that TLR4 polymorphisms and aberrant TLR4 expression have been associated with the clinical significance of osteoporosis. Mechanistically, dysregulation of osteoblasts and osteoclasts induced by abnormal expression of TLR4 is the main molecular mechanism underlying the pathological processes of osteoporosis, which may be associated with the interactions between TLR4 and NF-κB pathway, proinflammatory effects, ncRNAs, and RUNX2. In vivo and in vitro studies demonstrate that many promising substances or agents (i.e., methionine, dioscin, miR-1906 mimic, artesunate, AEG-1 deletion, patchouli alcohol, and Bacteroides vulgatus) have been able to improve bone metabolism (i.e., inhibits bone resorption and promotes bone formation), which may partially attribute to the inhibition of TLR4 expression. The present review highlights the important role of TLR4 in the clinical significance and the pathogenesis of osteoporosis from the aspects of inflammation and immunity. Future therapeutic strategies targeting TLR4 may provide a new insight for osteoporosis treatment.
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Affiliation(s)
- Xianping Zhu
- Department of Orthopedics, Taizhou Central Hospital (Taizhou University Hospital), Taizhou, Zhejiang, China
| | - Li Du
- Educational Administration Department, Chongqing University Cancer Hospital, Chongqing, China
| | - Lai Zhang
- Department of Orthopedics, Taizhou Municipal Hospital, Taizhou, Zhejiang, China
| | - Lingzhi Ding
- Department of Orthopedics, Taizhou Central Hospital (Taizhou University Hospital), Taizhou, Zhejiang, China
| | - Weifang Xu
- Department of Orthopedics, Taizhou Central Hospital (Taizhou University Hospital), Taizhou, Zhejiang, China
| | - Xuezheng Lin
- Department of Anesthesia Surgery, Taizhou Central Hospital (Taizhou University Hospital), Taizhou, China
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3
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Ma L, Song J, Chen X, Dai D, Chen J, Zhang L. Fecal microbiota transplantation regulates TFH/TFR cell imbalance via TLR/MyD88 pathway in experimental autoimmune hepatitis. Heliyon 2023; 9:e20591. [PMID: 37860535 PMCID: PMC10582310 DOI: 10.1016/j.heliyon.2023.e20591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 09/04/2023] [Accepted: 09/29/2023] [Indexed: 10/21/2023] Open
Abstract
Objective Autoimmune hepatitis (AIH) is a chronic immune-mediated inflammatory liver disease. Intestinal flora disturbance in AIH is closely related to TFH/TFR cell imbalances. As a new method of microbial therapy, the role of fecal microbiota transplantation (FMT) in AIH remains elusive. Here, we attempted to verify the functional role and molecular mechanism of FMT in AIH. Methods An experimental autoimmune hepatitis (EAH) mouse model was established to mimic the characteristics of AIH. H&E staining was used to detect histological features in mouse liver tissues. Serological tests were employed to identify several liver function biomarkers. Flow cytometry was utilized to examine the status of TFH/TFR cell subsets. Western blotting was used to evaluate TLR pathway-associated protein abundance. RT‒qPCR was applied to evaluate Treg cell markers and inflammation marker levels in mouse liver tissues. Results There was significant liver inflammation and dysregulated TFR/TFH cells with elevated levels of liver inflammation-associated biomarkers in EAH mice. Interestingly, transferring therapeutic FMT into EAH mice dramatically reduced liver injury and improved the imbalance between splenic TFR and TFH cells. FMT treatment also reduced elevated contents of serum alanine transaminase (ALT), aspartate aminotransferase (AST), and total bilirubin (TBIL) in EAH mice. Furthermore, therapeutic FMT reversed the increased levels of IL-21 while promoting IL-10 and TGF-β cytokines. Mechanistically, FMT regulated TFH cell response in EAH mice in a TLR4/11/MyD88 pathway-dependent manner. Conclusion Our findings demonstrated that liver injury and dysregulation between TFR and TFH cells in EAH might be reversed by therapeutic FMT via the TLR4/11-MyD88 signaling pathway.
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Affiliation(s)
- Liang Ma
- Department of Gastroenterology, The First People's Hospital of Changzhou, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
- Department of Gastroenterology, The People's Hospital of Wuqia, Xin Jiang, China
| | - Jianguo Song
- Department of Gastroenterology, The First People's Hospital of Changzhou, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
- Department of Gastroenterology, The People's Hospital of Wuqia, Xin Jiang, China
- Department of Gastroenterology, The Fifth People's Hospital of Xinjiang Uygur Autonomous Region, Xin Jiang, China
| | - Xueping Chen
- Department of Gastroenterology, The First People's Hospital of Changzhou, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
- Department of Gastroenterology, The People's Hospital of Wuqia, Xin Jiang, China
| | - Duan Dai
- Department of Gastroenterology, The First People's Hospital of Changzhou, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
| | - Jianping Chen
- Department of Gastroenterology, The First People's Hospital of Changzhou, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, China
| | - Liwen Zhang
- Department of Pediatrics, The Second People's Hospital of Changzhou, Affiliated Hospital of Nanjing Medical University, Changzhou, Jiangsu, China
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Pitsillou E, Liang JJ, Beh RC, Hung A, Karagiannis TC. Identification of dietary compounds that interact with the circadian clock machinery: Molecular docking and structural similarity analysis. J Mol Graph Model 2023; 123:108529. [PMID: 37263157 DOI: 10.1016/j.jmgm.2023.108529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/11/2023] [Accepted: 05/21/2023] [Indexed: 06/03/2023]
Abstract
The molecular clock is vital for regulating circadian rhythms in various physiological processes, and its dysregulation is associated with multiple diseases. As such, the use of small molecule modulators to regulate the molecular clock presents a promising therapeutic approach. In this study, we generated a homology model of the human circadian locomotor output cycles kaput (CLOCK) protein to evaluate its ligand binding sites. Using molecular docking, we obtained further insights into the binding mode of the control compound CLK8 and explored a selection of dietary compounds. Our investigation of dietary compounds was guided by their potential interactions with the retinoic acid-related orphan receptors RORα/γ, which are involved in circadian regulation. Through the molecular similarity and docking analyses, we identified oleanolic acid demethyl, 3-epi-lupeol, and taraxasterol as potential ROR-interacting compounds. These compounds may exert therapeutic effects through their modulation of RORα/γ activity and subsequently influence the molecular clock. Overall, our study highlights the potential of small molecule modulators in regulating the molecular clock and the importance of exploring dietary compounds as a source of such modulators. Our findings also provide insights into the binding mechanisms of CLK8 and shed light on potential compounds that can interact with RORs to regulate the molecular clock. Future investigations could focus on validating the efficacy of these compounds in modulating the molecular clock and their potential use as therapeutic agents.
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Affiliation(s)
- Eleni Pitsillou
- Epigenomic Medicine Laboratory at ProspED, Carlton, VIC, 3053, Australia; School of Science, STEM College, RMIT University, VIC, 3001, Australia
| | - Julia J Liang
- Epigenomic Medicine Laboratory at ProspED, Carlton, VIC, 3053, Australia; School of Science, STEM College, RMIT University, VIC, 3001, Australia
| | - Raymond C Beh
- Epigenomic Medicine Laboratory at ProspED, Carlton, VIC, 3053, Australia; School of Science, STEM College, RMIT University, VIC, 3001, Australia
| | - Andrew Hung
- School of Science, STEM College, RMIT University, VIC, 3001, Australia
| | - Tom C Karagiannis
- Epigenomic Medicine Laboratory at ProspED, Carlton, VIC, 3053, Australia; Department of Clinical Pathology, The University of Melbourne, Parkville, VIC, 3010, Australia.
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He H, Xu B, Ge P, Gao Y, Wei M, Li T, Zhang R, Li B, Cao H, Zhang K. The effects of taraxasterol on liver fibrosis revealed by RNA sequencing. Int Immunopharmacol 2023; 114:109481. [PMID: 36470119 DOI: 10.1016/j.intimp.2022.109481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 09/26/2022] [Accepted: 10/09/2022] [Indexed: 12/12/2022]
Abstract
Effective treatment of liver fibrosis remains a challenging medical problem. Taraxasterol (TAR) has anti-inflammatory, anti-tumor and hepatoprotective effects. Studies have shown that TAR has good biological activity against liver injury induced by various factors. However, the anti-fibrotic effect of TAR and its mechanism are never clarified. The purpose of this study was to investigate the effects of TAR in liver fibrosis and to reveal its possible mechanism by RNA sequencing. Our results suggested that TAR attenuated CCl4-induced hepatocyte necrosis, inflammatory infiltration and ECM deposition. TAR inhibited the levels of ALT, AST, ALP, γ-GT, LN, HA, PC III and IV-C in serum and TNF-α, IL-6, IL-1β and MDA in liver. In addition, TAR increased the activities of SOD and GSH-Px in liver. RNA sequencing analysis of liver tissues revealed that CCl4 and TAR significantly altered 4,155 genes and 2,675 genes, respectively. TAR reversed changes in ECM-related genes. More specifically, TAR mediated the expression of genes related to the activation of the Hippo pathway, while inhibiting the expression of genes related to the activation of HIF-1α, TGF-β/Smad, and Wnt pathways. In the validation experiments, the qRT-PCR results showed that the expression levels of Yap1, Tead3, Hif1α, Vegfa, Tgfβ1, Want3a, and Ctnnb1 mRNA were consistent with the RNA sequencing results. The Western blot results showed that TAR inhibited the levels of TGF-β1 and p-Smad2. In addition, the results in vitro were consistent with those in vivo. Therefore, we concluded that TAR improved CCl4-induced liver fibrosis by regulating Hippo, HIF-1α, TGF-β/Smad and Wnt pathways.
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Affiliation(s)
- Haiyan He
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin 541104, Guangxi, China; Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin 541104, Guangxi, China
| | - Baoling Xu
- The Second Affiliated Hospital of Guilin Medical University, Guilin, Guangxi 541104, China
| | - Pengfei Ge
- The Second Affiliated Hospital of Guilin Medical University, Guilin, Guangxi 541104, China
| | - Ya Gao
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin 541104, Guangxi, China; Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin 541104, Guangxi, China
| | - Min Wei
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin 541104, Guangxi, China; Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin 541104, Guangxi, China
| | - Ting Li
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin 541104, Guangxi, China; Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin 541104, Guangxi, China
| | - Ruobing Zhang
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin 541104, Guangxi, China; Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin 541104, Guangxi, China
| | - Bo Li
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin 541104, Guangxi, China; Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin 541104, Guangxi, China
| | - Houkang Cao
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin 541104, Guangxi, China; Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin 541104, Guangxi, China
| | - Kefeng Zhang
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin 541104, Guangxi, China; Guangxi Key Laboratory of Diabetic Systems Medicine, Guilin Medical University, Guilin 541104, Guangxi, China.
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Effects of torularhodin against acetaminophen induced liver injury base on antioxidation, anti-inflammation and anti-apoptosis. FOOD BIOSCI 2023. [DOI: 10.1016/j.fbio.2023.102388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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7
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The effects of scoparone on alcohol and high-fat diet-induced liver injury revealed by RNA sequencing. Biomed Pharmacother 2022; 155:113770. [DOI: 10.1016/j.biopha.2022.113770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/22/2022] [Accepted: 09/26/2022] [Indexed: 11/23/2022] Open
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Jiao F, Tan Z, Yu Z, Zhou B, Meng L, Shi X. The phytochemical and pharmacological profile of taraxasterol. Front Pharmacol 2022; 13:927365. [PMID: 35991893 PMCID: PMC9386448 DOI: 10.3389/fphar.2022.927365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 06/29/2022] [Indexed: 11/16/2022] Open
Abstract
Taraxasterol is one of the bioactive triterpenoids found in dandelion, a member of the family Asteraceae. In the animal or cellular models of several ailments, including liver damage, gastritis, colitis, arthritis, pneumonia, tumors, and immune system diseases, taraxasterol has been shown to have significant preventive and therapeutic effects. This review aims to evaluate the current state of research and provide an overview of the possible applications of taraxasterol in various diseases. The reported phytochemical properties and pharmacological actions of taraxasterol, including anti-inflammatory, anti-oxidative, and anti-carcinogenic properties, and its potential molecular mechanisms in developing these diseases are highlighted. Finally, we further explored whether taraxasterol has protective effects on neuronal death in neurodegenerative diseases. In addition, more animal and clinical studies are also required on the metabolism, bioavailability, and safety of taraxasterol to support its applications in pharmaceuticals and medicine.
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Affiliation(s)
- Fengjuan Jiao
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China
- Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China
- *Correspondence: Fengjuan Jiao,
| | - Zengyue Tan
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China
- Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China
| | - Zhonghua Yu
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China
- Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China
| | - Bojie Zhou
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China
- Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China
| | - Lingyan Meng
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China
- Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China
| | - Xinyue Shi
- Shandong Collaborative Innovation Center for Diagnosis, Treatment and Behavioral Interventions of Mental Disorders, Institute of Mental Health, Jining Medical University, Jining, China
- Shandong Key Laboratory of Behavioral Medicine, School of Mental Health, Jining Medical University, Jining, China
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9
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Song X, Cui W, Meng F, Xia Q, Li X, Hou M, Jia L, Zhang J. Glucopyranose from Pleurotus geesteranus prevent alcoholic liver diseases by regulating Nrf2/HO-1-TLR4/NF-κB signalling pathways and gut microbiota. Food Funct 2022; 13:2441-2455. [PMID: 35048917 DOI: 10.1039/d1fo03486c] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
This study investigated the effects of PGPs (Pleurotus geesteranus polysaccharides), a glucopyranose isolated from the mycelium of Pleurotus geesteranus and characterized with the main chain of →4)-α-D-Glcp-(1→, on the prevention against alcohol liver diseases (ALD), with the aim of providing a theoretical basis for the application of P. geesteranus as prebiotic agents in preventing and treating gut dysbiosis and alcohol-related metabolic disorders in individuals with ALD. The results showed that PGP treatment reduced oxidative stress by up-regulating the Nrf2/HO-1 signalling pathways, and decreased the pro-inflammatory factors by down-regulating TLR4/NF-κB signalling pathways. Furthermore, we validated effects of PGPs on balancing the gut-liver axis by maintaining the integrity of the intestinal epithelial barrier of decreasing intestinal permeability, increasing intestinal tight-junction protein and mucin expression and elevating the abundance of short-chain fatty acids (SCFAs) producers in the intestine by regulating the microbiota composition.
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Affiliation(s)
- Xinling Song
- College of Life Science, Shandong Agricultural University, Taian, 271018, PR China.
| | - Weijun Cui
- College of Life Science, Shandong Agricultural University, Taian, 271018, PR China.
| | - Fanyun Meng
- Xintai Science and Technology Bureau, Taian, 271000, PR China
| | - Qun Xia
- Xintai Science and Technology Bureau, Taian, 271000, PR China
| | - Xueping Li
- College of Life Science, Shandong Agricultural University, Taian, 271018, PR China.
| | - Minjie Hou
- College of Life Science, Shandong Agricultural University, Taian, 271018, PR China.
| | - Le Jia
- College of Life Science, Shandong Agricultural University, Taian, 271018, PR China.
| | - Jianjun Zhang
- College of Life Science, Shandong Agricultural University, Taian, 271018, PR China.
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10
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Li C, Wang M, Chen X, Chen W. Taraxasterol ameliorates dextran sodium sulfate-induced murine colitis via improving intestinal barrier and modulating gut microbiota dysbiosis. Acta Biochim Biophys Sin (Shanghai) 2022; 54:340-349. [PMID: 35538040 PMCID: PMC9827818 DOI: 10.3724/abbs.2022019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Taraxasterol (TAX) has been proven to prevent and treat inflammatory diseases. However, the effects of TAX on intestinal barrier and the diversity, structure, and function of gut microbiota have yet to be elucidated in dextran sodium sulfate (DSS)-induced colitis mice. Our objectives are to evaluate the effect of TAX on intestinal barrier and its impact on gut microbiota. Herein, immunofluorescence analysis is conducted to determine the expressions of tight junction (ZO-1) and mucin (Mucin-2) proteins. The abundance, diversity, and function of fecal colonies are investigated by using 16S rDNA sequencing, and the influence of TAX on the gut microbiota in mice is also analyzed. Our results suggest that TAX attenuates the symptoms in DSS-induced colitis mice by reducing the DAI score, increasing colon length, alleviating histopathological damage of colon tissues, and improving intestinal barrier. 16S rDNA sequencing of fecal samples indicates that TAX intervention has a regulatory effect on DSS-induced gut microbiota dysbiosis at different taxonomic levels. TAX increases microbial diversity that is reduced by DSS. It normalizes the relative abundance of and the ratio of /. In addition, treatment with TAX has a better effect on the function of metabolisms, such as nucleotide, lipid, and bile acid metabolism. These findings suggest that TAX may be a good candidate for the remission of colitis, which is related to improving intestinal barrier and modulating gut microbiota.
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Affiliation(s)
- Chen Li
- Department of General SurgeryAffiliated Hospital of Shandong University of Traditional Chinese MedicineJinan250014China
| | - Meng Wang
- Department of General SurgeryAffiliated Hospital of Shandong University of Traditional Chinese MedicineJinan250014China
| | - Xiqi Chen
- Department of General SurgeryAffiliated Hospital of Shandong University of Traditional Chinese MedicineJinan250014China
| | - Wei Chen
- Department of GastroenterologyShuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai201203China,Correspondence address. Tel: +86-18217789965; E-mail:
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11
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Ye Y, Shi L, Wang P, Yang M, Zhan P, Tian H, Liu J. Water extract of Ferula lehmanni Boiss. prevents high-fat diet-induced overweight and liver injury by modulating the intestinal microbiota in mice. Food Funct 2022; 13:1603-1616. [PMID: 35076647 DOI: 10.1039/d1fo03518e] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Obesity, often accompanied by hepatic steatosis, has been associated with an increased risk of health complications such as fatty liver disease and certain cancers. Ferula lehmannii Boiss., a food and medicine homologue, has been used for centuries as a seasoning showing anti-bacterial and anti-oxidant effects on digestive discomfort. In the present study, we sought to investigate whether a short-term oral administration of water extract of Ferula lehmanni Boiss. (WEFL) could prevent high-fat diet (HFD)-induced abnormal weight gain and hepatic steatosis in mice and its underlying mechanisms. WEFL reduced HFD-increased body weight, liver injury markers and inflammatory cytokines (i.e. IL-6 and IL-1β), and inhibited the elevation of AMPKα, SREBP-1c and FAS in HFD. Moreover, WEFL reconstructed the gut microbiota composition by increasing the relative abundances of beneficial bacteria, e.g. Akkermansia spp., while decreasing Desulfovibrio spp. and so on, thereby reversing the detrimental effects of HFD in mice. Removal of the gut microbiota with antibiotics partially eliminated the hepatoprotective effects of WEFL. Notably, WEFL substantially promoted the levels of short-chain fatty acids, especially butyric acid. To clarify the functional components at play in WEFL, we used UPLC-MS/MS to comprehensively detect its substance composition and found it to be a collection of polyphenol-rich compounds. Together, our findings demonstrate that WEFL prevented HFD-induced obesity and liver injury through the hepatic-microbiota axis, and such health-promoting value might be explained by the enriched abundant polyphenols.
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Affiliation(s)
- Yuting Ye
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, China.
| | - Lin Shi
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, China.
| | - Peng Wang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, China.
| | - Minmin Yang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, China.
| | - Ping Zhan
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, China.
| | - Honglei Tian
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, China. .,Shaanxi Provincial Research Center of Functional Food Engineering Technology, Xi'an, China
| | - Jianshu Liu
- Shaanxi Provincial Research Center of Functional Food Engineering Technology, Xi'an, China
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12
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Cadamuro M, Lasagni A, Sarcognato S, Guido M, Fabris R, Strazzabosco M, Strain AJ, Simioni P, Villa E, Fabris L. The Neglected Role of Bile Duct Epithelial Cells in NASH. Semin Liver Dis 2022; 42:34-47. [PMID: 34794182 DOI: 10.1055/s-0041-1739455] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the most prevalent liver disease worldwide, and affects 25% of the population in Western countries. NAFLD is the hepatic manifestation of the metabolic syndrome, linked to insulin resistance, which is the common pathogenetic mechanism. In approximately 40% of NAFLD patients, steatosis is associated with necro-inflammation and fibrosis, resulting in nonalcoholic steatohepatitis (NASH), a severe condition that may progress to cirrhosis and liver cancer. Although the hepatocyte represents the main target of the disease, involvement of the bile ducts occurs in a subset of patients with NASH, and is characterized by ductular reaction and activation of the progenitor cell compartment, which incites portal fibrosis and disease progression. We aim to dissect the multiple biological effects that adipokines and metabolic alterations exert on cholangiocytes to derive novel information on the mechanisms driven by insulin resistance, which promote fibro-inflammation and carcinogenesis in NASH.
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Affiliation(s)
| | - Alberto Lasagni
- Division of General Medicine, Padua University-Hospital, Padua, Italy
| | | | - Maria Guido
- Department of Pathology, Azienda ULSS2 Marca Trevigiana, Treviso, Italy.,Department of Medicine (DIMED), University of Padua, Padua, Italy
| | - Roberto Fabris
- Division of Clinica Medica 3, Center for the Study and the Integrated Management of Obesity, Padua University-Hospital, Padua, Italy
| | - Mario Strazzabosco
- Department of Internal Medicine, Digestive Disease Section, Liver Center, Yale University, New Haven, Connecticut
| | - Alastair J Strain
- School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Paolo Simioni
- Division of General Medicine, Padua University-Hospital, Padua, Italy.,Department of Medicine (DIMED), University of Padua, Padua, Italy
| | - Erica Villa
- Gastroenterology Unit, Department of Medical Specialties, University of Modena & Reggio Emilia and Modena University-Hospital, Modena, Italy
| | - Luca Fabris
- Department of Molecular Medicine (DMM), University of Padua, Padua, Italy.,Division of General Medicine, Padua University-Hospital, Padua, Italy.,Department of Internal Medicine, Digestive Disease Section, Liver Center, Yale University, New Haven, Connecticut
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13
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Huang X, Gao Y, Cao H, Li J, Mo S, Li T, Wu J, Guo K, Wei R, Zhang K. Effects of scoparone on non-alcoholic fatty liver disease revealed by RNA sequencing. Front Endocrinol (Lausanne) 2022; 13:1004284. [PMID: 36157436 PMCID: PMC9500212 DOI: 10.3389/fendo.2022.1004284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 08/11/2022] [Indexed: 11/21/2022] Open
Abstract
Scoparone (SCO) is known to have curative effect of alleviating liver injury. The purpose of this study was to observe the therapeutic effect and possible mechanism of SCO against high-fat diet (HFD) induced non-alcoholic liver disease (NAFLD) through in vivo experiments and RNA sequencing. Male Kunming mice were fed with HFD for 8 weeks to establish a mouse model of NAFLD, and SCO was used to treat NAFLD. Histopathology and biochemical indicators were used to evaluate the liver injury and the efficacy of SCO. RNA sequencing analysis was performed to elucidate the hepatoprotective mechanism of SCO. Finally, the differentially expressed genes of cholesterol synthesis and fatty acid (triglyceride) synthesis pathways were verified by quantitative real-time polymerase chain reaction (qRT-PCR) and western blot. The histopathological results showed that HFD could lead to significant steatosis in mice, while SCO could alleviate liver steatosis remarkably in NAFLD mice. The determination of biochemical indicators showed that SCO could inhibit the increased serum transaminase activity and liver lipid level induced by HFD. RNA sequencing analysis of liver tissues found that 2742 and 3663 genes were significantly changed by HFD and SCO, respectively. SCO reversed the most of genes involved in cholesterol synthesis and fatty acid (triglyceride) metabolism induced by HFD. the results of the validation experiment were mostly consistent with the RNA sequencing. SCO alleviated liver injury and steatosis in NAFLD mice, which may be closely related to the regulation of cholesterol and fatty acid (triglyceride) metabolism.
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Affiliation(s)
- Xiaoyan Huang
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin, China
- Guangxi Key Laboratory of Diabetic Systems Medicine, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Ya Gao
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin, China
- Guangxi Key Laboratory of Diabetic Systems Medicine, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Houkang Cao
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin, China
| | - Jun Li
- Department of Obstetrics & Gynaecology, National University of Singapore, Singapore, Singapore
| | - Siyi Mo
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin, China
| | - Ting Li
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin, China
| | - Jianzhao Wu
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin, China
| | - Kai Guo
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin, China
| | - Riming Wei
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin, China
- Guangxi Key Laboratory of Diabetic Systems Medicine, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
- *Correspondence: Riming Wei, ; Kefeng Zhang,
| | - Kefeng Zhang
- Pharmacology Laboratory of Prevention and Treatment of High Incidence of Disease, Guilin Medical University, Guilin, China
- Guangxi Key Laboratory of Diabetic Systems Medicine, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
- *Correspondence: Riming Wei, ; Kefeng Zhang,
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14
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Chlorogenic Acid Protects against Advanced Alcoholic Steatohepatitis in Rats via Modulation of Redox Homeostasis, Inflammation, and Lipogenesis. Nutrients 2021; 13:nu13114155. [PMID: 34836410 PMCID: PMC8617701 DOI: 10.3390/nu13114155] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/16/2021] [Accepted: 11/19/2021] [Indexed: 11/17/2022] Open
Abstract
The aim of this study was to evaluate the therapeutic effects of chlorogenic acid (CGA) in rats with advanced alcoholic steatohepatitis. The rats were fed on a high-fat diet and gavaged with ethanol (4 g/kg) for 8 weeks. The livers of ethanol-treated rats showed steatosis; necrosis and mononuclear infiltration; and significant upregulation of the mRNA expression of the prooxidant (Cyp2e1, iNos), lipogenic (Srebp1, Acc), proinflammatory (Tlr4, Nf-κb, TnfA, Il-1B, and Il-6), and profibrogenic (TgfB, Col1, VegfA) genes. Simultaneously, a downregulation of level of Sod and Nrf2 was observed, which was accompanied by increased serum transaminase, TnfA, and serum and liver triglycerides levels. CGA administration (40 and 80 mg/kg, 8 weeks) to ethanol-fed group reduced the liver expression levels of Cyp2e1 and iNos, whereas it markedly enhanced the expression of Sod, Nrf2, and Ho-1. CGA at both doses downregulated the expressions of lipogenic, proinflammatory, and profibrogenic genes, while the expression of Tlr4 was lowered only after the higher dose of CGA. The higher dose of CGA efficiently prevented the progression of alcohol-induced steatosis and reduced inflammation through regulation of the expression of genes encoding the proteins involved in the Tlr4/Nf-κB signaling pathway and fibrosis. The study revealed hepatoprotective and anti-inflammatory effects of CGA through the regulation of expression of genes encoding Cyp2e1/Nrf2 involved in oxidative stress modulation. These results demonstrate CGA as a therapeutic candidate for the prevention and treatment of alcoholic steatohepatitis.
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15
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Limonin Inhibits IL-1 β-Induced Inflammation and Catabolism in Chondrocytes and Ameliorates Osteoarthritis by Activating Nrf2. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:7292512. [PMID: 34795843 PMCID: PMC8595032 DOI: 10.1155/2021/7292512] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 09/17/2021] [Accepted: 10/06/2021] [Indexed: 12/23/2022]
Abstract
Osteoarthritis (OA), a degenerative disorder, is considered to be one of the most common forms of arthritis. Limonin (Lim) is extracted from lemons and other citrus fruits. Limonin has been reported to have anti-inflammatory effects, while inflammation is a major cause of OA; thus, we propose that limonin may have a therapeutic effect on OA. In this study, the therapeutic effect of limonin on OA was assessed in chondrocytes in vitro in IL-1β induced OA and in the destabilization of the medial meniscus (DMM) mice in vivo. The Nrf2/HO-1/NF-κB signaling pathway was evaluated to illustrate the working mechanism of limonin on OA in chondrocytes. In this study, it was found that limonin can reduce the level of IL-1β induced proinflammatory cytokines such as INOS, COX-2, PGE2, NO, TNF-α, and IL-6. Limonin can also diminish the biosynthesis of IL-1β-stimulated chondrogenic catabolic enzymes such as MMP13 and ADAMTS5 in chondrocytes. The research on the mechanism study demonstrated that limonin exerts its protective effect on OA through the Nrf2/HO-1/NF-κB signaling pathway. Taken together, the present study shows that limonin may activate the Nrf2/HO-1/NF-κB pathway to alleviate OA, making it a candidate therapeutic agent for OA.
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16
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Fatima N, Sheikh N, Satoskar AR, Jha BK, Akhtar T, Tayyeb A, Ashfaq I. Interaction of tacrolimus through hedgehog signaling pathway: An in vitro evaluation using rat hepatocytes. Hum Exp Toxicol 2021; 40:1955-1961. [PMID: 33977768 DOI: 10.1177/09603271211017313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Tacrolimus (TAC) is the drug of choice in immunosuppressive therapy for organ transplantation; however, adverse effects are still a major concern. The current study aims to decipher the short-term exposure of TAC on rat hepatocytes in relation to activation of hedgehog (HH) signaling pathway. Time dependent study was conducted using primary rat hepatocytes treated with TAC (36 µM) for 6, 12, 24 and 48 h. Western blot analysis was performed using cell lysate in order to analyze the regulation of HH pathway proteins including HHIP, SMO, PTCH, IHH, SHH, and GLI transcription factors. The study revealed change in protein expression of HH signaling molecules with activation of HH pathway, due to downregulation of HHIP, and enrichment of HH ligands with activation of SMO and GLI transcription factors. It is therefore, concluded that short term TAC exposure leads to upregulation of HH pathway in liver, which may initially act to repair the liver damage but can worsen the condition in case of prolonged immunosuppressive therapy. This insight could lead to understand association of off target effects of immunosuppressive drugs and occurrence of other liver diseases in transplant patients when it comes to long term immunosuppressive therapy. These findings also illuminate a novel direction that use of HH inhibitor might provide a therapeutic strategy for immune suppression related liver disorders.
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Affiliation(s)
- N Fatima
- Cell and Molecular Biology Lab, Institute of Zoology, University of the Punjab, Lahore, Pakistan.,Department of Pathology and Microbiology, Wexner Medical Center, The Ohio State University, Columbus, OH, USA
| | - N Sheikh
- Cell and Molecular Biology Lab, Institute of Zoology, University of the Punjab, Lahore, Pakistan
| | - A R Satoskar
- Department of Pathology and Microbiology, Wexner Medical Center, The Ohio State University, Columbus, OH, USA
| | - B K Jha
- Department of Pathology and Microbiology, Wexner Medical Center, The Ohio State University, Columbus, OH, USA
| | - T Akhtar
- Department of Pharmacology, University of Health Sciences, Lahore, Pakistan
| | - A Tayyeb
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - I Ashfaq
- Cell and Molecular Biology Lab, Institute of Zoology, University of the Punjab, Lahore, Pakistan
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17
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Mi B, Xiong Y, Zhang C, Zhou W, Chen L, Cao F, Chen F, Geng Z, Panayi AC, Sun Y, Wang L, Liu G. SARS-CoV-2-induced Overexpression of miR-4485 Suppresses Osteogenic Differentiation and Impairs Fracture Healing. Int J Biol Sci 2021; 17:1277-1288. [PMID: 33867845 PMCID: PMC8040480 DOI: 10.7150/ijbs.56657] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 03/10/2021] [Indexed: 02/06/2023] Open
Abstract
The angiotensin-converting enzyme 2 (ACE2) receptor has been identified as the cell entry point for SARS-CoV-2. Although ACE2 receptors are present in the bone marrow, the effects of SARS-CoV-2 on the biological activity of bone tissue have not yet been elucidated. In the present study we sought to investigate the impact of SARS-CoV-2 on osteoblastic activity in the context of fracture healing. MicroRNA-4485 (miR-4485), which we found to be upregulated in COVID-19 patients, negatively regulates osteogenic differentiation. We demonstrate this effect both in vitro and in vivo. Moreover, we identified the toll-like receptor 4 (TLR-4) as the potential target gene of miR-4485, and showed that reduction of TLR-4 induced by miR-4485 suppresses osteoblastic differentiation in vitro. Taken together, our findings highlight that up-regulation of miR-4485 is responsible for the suppression of osteogenic differentiation in COVID-19 patients, and TLR-4 is the potential target through which miR-4485 acts, providing a promising target for pro-fracture-healing and anti-osteoporosis therapy in COVID-19 patients.
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Affiliation(s)
- Bobin Mi
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology Wuhan, Hubei 430022, China
| | - Yuan Xiong
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology Wuhan, Hubei 430022, China
| | - Chenming Zhang
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology Wuhan, Hubei 430022, China
| | - Wu Zhou
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology Wuhan, Hubei 430022, China
| | - Lang Chen
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology Wuhan, Hubei 430022, China
| | - Faqi Cao
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology Wuhan, Hubei 430022, China
| | - Fenghua Chen
- Department of Clinical Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology Wuhan, Hubei 430022, China
| | - Zhi Geng
- Department of Clinical Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology Wuhan, Hubei 430022, China
| | - Adriana C. Panayi
- Division of Plastic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston 02115, USA
| | - Yun Sun
- Department of Neurosurgery, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology Wuhan, Hubei 430022, China
| | - Lin Wang
- Department of Clinical Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology Wuhan, Hubei 430022, China
| | - Guohui Liu
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology Wuhan, Hubei 430022, China
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18
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Yang F, Ye XJ, Chen MY, Li HC, Wang YF, Zhong MY, Zhong CS, Zeng B, Xu LH, He XH, Ouyang DY. Inhibition of NLRP3 Inflammasome Activation and Pyroptosis in Macrophages by Taraxasterol Is Associated With Its Regulation on mTOR Signaling. Front Immunol 2021; 12:632606. [PMID: 33679781 PMCID: PMC7925414 DOI: 10.3389/fimmu.2021.632606] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 01/28/2021] [Indexed: 12/21/2022] Open
Abstract
Taraxasterol (TAS) is an active ingredient of Dandelion (Taraxacum mongolicum Hand. -Mazz.), a medicinal plant that has long been used in China for treatment of inflammatory disorders. But the underlying mechanism for its therapeutic effects on inflammatory disorders is not completely clear. Inflammasome activation is a critical step of innate immune response to infection and aseptic inflammation. Among the various types of inflammasome sensors that has been reported, NLR family pyrin domain containing 3 (NLRP3) is implicated in various inflammatory diseases and therefore has been most extensively studied. In this study, we aimed to explore whether TAS could influence NLPR3 inflammasome activation in macrophages. The results showed that TAS dose-dependently suppressed the activation of caspase-1 in lipopolysaccharide (LPS)-primed murine primary macrophages upon nigericin treatment, resulting in reduced mature interleukin-1β (IL-1β) release and gasdermin D (GSDMD) cleavage. TAS greatly reduced ASC speck formation upon the stimulation of nigericin or extracellular ATP. Consistent with reduced cleavage of GSDMD, nigericin-induced pyroptosis was alleviated by TAS. Interestingly, TAS time-dependently suppressed the mechanistic target of rapamycin (mTOR) complex 1 (mTORC1) and mTORC2 signaling induced by LPS priming. Like TAS, both INK-128 (inhibiting both mTORC1 and mTORC2) and rapamycin (inhibiting mTORC1 only) also inhibited NLRP3 inflammasome activation, though their effects on mTOR signaling were different. Moreover, TAS treatment alleviated mitochondrial damage by nigericin and improved mouse survival from bacterial infection, accompanied by reduced IL-1β levels in vivo. Collectively, by inhibiting the NLRP3 inflammasome activation, TAS displayed anti-inflammatory effects likely through regulation of the mTOR signaling in macrophages, highlighting a potential action mechanism for the anti-inflammatory activity of Dandelion in treating inflammation-related disorders, which warrants further clinical investigation.
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Affiliation(s)
- Fan Yang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Xun-Jia Ye
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Ming-Ye Chen
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Hong-Chun Li
- Wuzhongpei Memorial Hospital of Shunde, Foshan, China
| | - Yao-Feng Wang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Mei-Yan Zhong
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Chun-Su Zhong
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Bo Zeng
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Li-Hui Xu
- Department of Cell Biology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Xian-Hui He
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Dong-Yun Ouyang
- Department of Immunobiology, College of Life Science and Technology, Jinan University, Guangzhou, China
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19
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Khan HU, Aamir K, Jusuf PR, Sethi G, Sisinthy SP, Ghildyal R, Arya A. Lauric acid ameliorates lipopolysaccharide (LPS)-induced liver inflammation by mediating TLR4/MyD88 pathway in Sprague Dawley (SD) rats. Life Sci 2020; 265:118750. [PMID: 33188836 DOI: 10.1016/j.lfs.2020.118750] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 11/05/2020] [Accepted: 11/09/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND Lipopolysaccharide (LPS) is an endotoxin that leads to inflammation in many organs, including liver. It binds to pattern recognition receptors, that generally recognise pathogen expressed molecules to transduce signals that result in a multifaceted network of intracellular responses ending up in inflammation. Aim In this study, we used lauric acid (LA), a constituent abundantly found in coconut oil to determine its anti-inflammatory role in LPS-induced liver inflammation in Sprague Dawley (SD) rats. METHOD Male SD rats were divided into five groups (n = 8), injected with LPS and thereafter treated with LA (50 and 100 mg/kg) or vehicle orally for 14 days. After fourteen days of LA treatment, all the groups were humanely killed to investigate biochemical parameters followed by pro-inflammatory cytokine markers; tumour necrosis factor-α (TNF-α), interleukin-6 (IL-6), and IL-1β. Moreover, liver tissues were harvested for histopathological studies and evaluation of targeted protein expression with western blot and localisation through immunohistochemistry (IHC). RESULTS The study results showed that treatment of LA 50 and 100 mg/kg for 14 days were able to reduce the elevated level of pro-inflammatory cytokines, liver inflammation, and downregulated the expression of TLR4/NF-κB mediating proteins in liver tissues. CONCLUSION These findings suggest that treatment of LA has a protective role against LPS-induced liver inflammation in rats, thus, warrants further in-depth investigation through mechanistic approaches in different study models.
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Affiliation(s)
- Hidayat Ullah Khan
- School of Pharmacy, Faculty of Health and Medical Sciences, Taylor's University, Subang Jaya, Malaysia
| | - Khurram Aamir
- School of Pharmacy, Faculty of Health and Medical Sciences, Taylor's University, Subang Jaya, Malaysia
| | - Patricia Regina Jusuf
- School of Biosciences, Faculty of Science, The University of Melbourne, Victoria 3010, Australia
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Sreenivas Patro Sisinthy
- Faculty of Pharmacy and Health Sciences, University of Kuala Lumpur, Royal College of Medicine Perak, Ipoh 30450, Perak, Malaysia
| | - Reena Ghildyal
- Centre for Research in Therapeutic Solutions, Faculty of Science and Technology, University of Canberra, Canberra, Australia
| | - Aditya Arya
- School of Biosciences, Faculty of Science, The University of Melbourne, Victoria 3010, Australia; Department of Pharmacology and Therapeutics, School of Medicine, Faculty of Health and Medical Sciences, Taylor's University, Subang Jaya, Malaysia; Department of Pharmacology and Therapeutics, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Parkville, Victoria 3010, Australia.
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