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Lu G, Tang Y, Chen O, Guo Y, Xiao M, Wang J, Liu Q, Li J, Gao T, Zhang X, Zhang J, Cheng Q, Kuang R, Gu J. Aberrant activation of p53-TRIB3 axis contributes to diabetic myocardial insulin resistance and sulforaphane protection. J Adv Res 2024:S2090-1232(24)00307-2. [PMID: 39069209 DOI: 10.1016/j.jare.2024.07.025] [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: 03/28/2024] [Revised: 07/02/2024] [Accepted: 07/25/2024] [Indexed: 07/30/2024] Open
Abstract
INTRODUCTION Insulin resistance (IR) is associated with multiple pathological features. Although p53- or TRIB3-orchestrated IR is extensively studied in adipose tissue and liver, the role of p53-TRIB3 axis in myocardial IR remains unknown, and more importantly target-directed therapies of myocardial IR are missing. OBJECTIVES Considering the beneficial effects of sulforaphane (SFN) on cardiovascular health, it is of particular interest to explore whether SFN protects against myocardial IR with a focus on the regulatory role of p53-TRIB3 axis. METHODS Mouse models including cardiac specific p53-overexpressing transgenic (p53-cTg) mice and Trib3 knockout (Trib3-KO) mice, combined with primary cardiomyocytes treated with p53 activator (nutlin-3a) and inhibitor (pifithrin-α, PFT-α), or transfected with p53-shRNA and Trib3-shRNA, followed by multiple molecular biological methodologies, were used to investigate the role of p53-TRIB3 axis in SFN actions on myocardial IR. RESULTS Here, we report that knockdown of p53 rescued cardiac insulin-stimulated AKT phosphorylation, while up-regulation of p53 by nutlin-3a or p53-cTg mice blunted insulin sensitivity in cardiomyocytes under diabetic conditions. Diabetic attenuation of AKT-mediated cardiac insulin signaling was markedly reversed by SFN in p53-Tgfl/fl mice, but not in p53-cTg mice. Importantly, we identified TRIB3 was elevated in p53-cTg diabetic mice, and confirmed the physical interaction between p53 and TRIB3. Trib3-KO diabetic mice displayed improved insulin sensitivity in the heart. More specifically, the AMPKα-triggered CHOP phosphorylation and degradation were essential for p53 on the transcriptional regulation of Trib3. CONCLUSION Overall, these results indicate that inhibiting the p53-TRIB3 pathway by SFN plays an unsuspected key role in the improvement of myocardial IR, which may be a promising strategy for attenuating diabetic cardiomyopathy (DCM) in diabetic patients.
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Affiliation(s)
- Guangping Lu
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Yufeng Tang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong 250014, China
| | - Ou Chen
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Yuanfang Guo
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Mengjie Xiao
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Jie Wang
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Qingbo Liu
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Jiahao Li
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Ting Gao
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Xiaohui Zhang
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Jingjing Zhang
- Department of Cardiology at the First Hospital of China Medical University, and Department of Cardiology at the People's Hospital of Liaoning Province, Shenyang, Liaoning 110016, China
| | - Quanli Cheng
- Department of Cardiovascular Disease, First Hospital of Jilin University, Changchun, Jilin 130021, China.
| | - Rong Kuang
- NMPA Key Laboratory for Animal Alternative Testing Technology of Cosmetics, Zhejiang Institute for Food and Drug Control, Hangzhou, Zhejiang 310004, China.
| | - Junlian Gu
- School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China.
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Hammond FR, Lewis A, Pollara G, Tomlinson GS, Noursadeghi M, Kiss-Toth E, Elks PM. Tribbles1 is host protective during in vivo mycobacterial infection. eLife 2024; 13:e95980. [PMID: 38896446 PMCID: PMC11186633 DOI: 10.7554/elife.95980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 05/28/2024] [Indexed: 06/21/2024] Open
Abstract
Tuberculosis is a major global health problem and is one of the top 10 causes of death worldwide. There is a pressing need for new treatments that circumvent emerging antibiotic resistance. Mycobacterium tuberculosis parasitises macrophages, reprogramming them to establish a niche in which to proliferate, therefore macrophage manipulation is a potential host-directed therapy if druggable molecular targets could be identified. The pseudokinase Tribbles1 (Trib1) regulates multiple innate immune processes and inflammatory profiles making it a potential drug target in infections. Trib1 controls macrophage function, cytokine production, and macrophage polarisation. Despite wide-ranging effects on leukocyte biology, data exploring the roles of Tribbles in infection in vivo are limited. Here, we identify that human Tribbles1 is expressed in monocytes and is upregulated at the transcript level after stimulation with mycobacterial antigen. To investigate the mechanistic roles of Tribbles in the host response to mycobacteria in vivo, we used a zebrafish Mycobacterium marinum (Mm) infection tuberculosis model. Zebrafish Tribbles family members were characterised and shown to have substantial mRNA and protein sequence homology to their human orthologues. trib1 overexpression was host-protective against Mm infection, reducing burden by approximately 50%. Conversely, trib1 knockdown/knockout exhibited increased infection. Mechanistically, trib1 overexpression significantly increased the levels of proinflammatory factors il-1β and nitric oxide. The host-protective effect of trib1 was found to be dependent on the E3 ubiquitin kinase Cop1. These findings highlight the importance of Trib1 and Cop1 as immune regulators during infection in vivo and suggest that enhancing macrophage TRIB1 levels may provide a tractable therapeutic intervention to improve bacterial infection outcomes in tuberculosis.
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Affiliation(s)
- Ffion R Hammond
- The Bateson Centre, School of Medicine and Population Health, Faculty of Health, University of SheffieldSheffieldUnited Kingdom
| | - Amy Lewis
- The Bateson Centre, School of Medicine and Population Health, Faculty of Health, University of SheffieldSheffieldUnited Kingdom
| | - Gabriele Pollara
- Division of Infection & Immunity, University College LondonLondonUnited Kingdom
| | - Gillian S Tomlinson
- Division of Infection & Immunity, University College LondonLondonUnited Kingdom
| | - Mahdad Noursadeghi
- Division of Infection & Immunity, University College LondonLondonUnited Kingdom
| | - Endre Kiss-Toth
- The Bateson Centre, School of Medicine and Population Health, Faculty of Health, University of SheffieldSheffieldUnited Kingdom
| | - Philip M Elks
- The Bateson Centre, School of Medicine and Population Health, Faculty of Health, University of SheffieldSheffieldUnited Kingdom
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Salminen A. AMPK signaling inhibits the differentiation of myofibroblasts: impact on age-related tissue fibrosis and degeneration. Biogerontology 2024; 25:83-106. [PMID: 37917219 PMCID: PMC10794430 DOI: 10.1007/s10522-023-10072-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 09/26/2023] [Indexed: 11/04/2023]
Abstract
Disruption of the extracellular matrix (ECM) and an accumulation of fibrotic lesions within tissues are two of the distinctive hallmarks of the aging process. Tissue fibroblasts are mesenchymal cells which display an impressive plasticity in the regulation of ECM integrity and thus on tissue homeostasis. Single-cell transcriptome studies have revealed that tissue fibroblasts exhibit a remarkable heterogeneity with aging and in age-related diseases. Excessive stress and inflammatory insults induce the differentiation of fibroblasts into myofibroblasts which are fusiform contractile cells and abundantly secrete the components of the ECM and proteolytic enzymes as well as many inflammatory mediators. Detrimental stresses can also induce the transdifferentiation of certain mesenchymal and myeloid cells into myofibroblasts. Interestingly, many age-related stresses, such as oxidative and endoplasmic reticulum stresses, ECM stiffness, inflammatory mediators, telomere shortening, and several alarmins from damaged cells are potent inducers of myofibroblast differentiation. Intriguingly, there is convincing evidence that the signaling pathways stimulated by the AMP-activated protein kinase (AMPK) are potent inhibitors of myofibroblast differentiation and accordingly AMPK signaling reduces fibrotic lesions within tissues, e.g., in age-related cardiac and pulmonary fibrosis. AMPK signaling is not only an important regulator of energy metabolism but it is also able to control cell fate determination and many functions of the immune system. It is known that AMPK signaling can delay the aging process via an integrated signaling network. AMPK signaling inhibits myofibroblast differentiation, e.g., by suppressing signaling through the TGF-β, NF-κB, STAT3, and YAP/TAZ pathways. It seems that AMPK signaling can alleviate age-related tissue fibrosis and degeneration by inhibiting the differentiation of myofibroblasts.
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Affiliation(s)
- Antero Salminen
- Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, 70211, Kuopio, Finland.
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4
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Huang YM, Wu YS, Dang YY, Xu YM, Ma KY, Dai XY. Par3L, a polarity protein, promotes M1 macrophage polarization and aggravates atherosclerosis in mice via p65 and ERK activation. Acta Pharmacol Sin 2024; 45:112-124. [PMID: 37731037 PMCID: PMC10770347 DOI: 10.1038/s41401-023-01161-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 08/29/2023] [Indexed: 09/22/2023] Open
Abstract
Proinflammatory M1 macrophages are critical for the progression of atherosclerosis. The Par3-like protein (Par3L) is a homolog of the Par3 family involved in cell polarity establishment. Par3L has been shown to maintain the stemness of mammary stem cells and promote the survival of colorectal cancer cells. In this study, we investigated the roles of the polar protein Par3L in M1 macrophage polarization and atherosclerosis. To induce atherosclerosis, Apoe-/- mice were fed with an atherosclerotic Western diet for 8 or 16 weeks. We showed that Par3L expression was significantly increased in human and mouse atherosclerotic plaques. In primary mouse macrophages, oxidized low-density lipoprotein (oxLDL, 50 μg/mL) time-dependently increased Par3L expression. In Apoe-/- mice, adenovirus-mediated Par3L overexpression aggravated atherosclerotic plaque formation accompanied by increased M1 macrophages in atherosclerotic plaques and bone marrow. In mouse bone marrow-derived macrophages (BMDMs) or peritoneal macrophages (PMs), we revealed that Par3L overexpression promoted LPS and IFNγ-induced M1 macrophage polarization by activating p65 and extracellular signal-regulated kinase (ERK) rather than p38 and JNK signaling. Our results uncover a previously unidentified role for the polarity protein Par3L in aggravating atherosclerosis and favoring M1 macrophage polarization, suggesting that Par3L may serve as a potential therapeutic target for atherosclerosis.
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Affiliation(s)
- Yi-Min Huang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Yu-Sen Wu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Yuan-Ye Dang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Yi-Ming Xu
- School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Kong-Yang Ma
- Centre for Infection and Immunity Studies (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, 518107, China
| | - Xiao-Yan Dai
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, China.
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Wang Y, Li M, Chen J, Yu Y, Yu Y, Shi H, Liu X, Chen Z, Chen R, Ge J. Macrophage CAPN4 regulates CVB3-induced cardiac inflammation and injury by promoting NLRP3 inflammasome activation and phenotypic transformation to the inflammatory subtype. Free Radic Biol Med 2023; 208:430-444. [PMID: 37660839 DOI: 10.1016/j.freeradbiomed.2023.08.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 08/31/2023] [Accepted: 08/31/2023] [Indexed: 09/05/2023]
Abstract
Exploring the immune mechanism of coxsackievirus B3 (CVB3)-induced myocarditis may provide a promising therapeutic strategy. Here, we investigated the regulatory role of macrophage CAPN4 in the phenotypic transformation of macrophages and NOD-like receptor protein 3 (NLRP3) inflammasome activation. We found that CAPN4 was the most upregulated subtype of the calpain family in CVB3-infected bone marrow-derived macrophages (BMDMs) and Raw 264.7 cells after CVB3 infection and was upregulated in cardiac macrophages from CVB3-infected mice. Conditional knockout of CAPN4 (CAPN4flox/flox; LYZ2-Cre, CAPN4-cKO mice) ameliorated inflammation and myocardial injury and improved cardiac function and survival after CVB3 infection. Enrichment analysis revealed that macrophage differentiation and the interleukin signaling pathway were the most predominant biological processes in macrophages after CVB3 infection. We further found that CVB3 infection and the overexpression of CAPN4 promoted macrophage M1 polarization and NLRP3 inflammasome activation, while CAPN4 knockdown reversed these changes. Correspondingly, CAPN4-cKO alleviated CVB3-induced M1 macrophage transformation and NLRP3 expression and moderately increased M2 transformation in vivo. The culture supernatant of CAPN4-overexpressing or CVB3-infected macrophages impaired cardiac fibroblast function and viability. Moreover, macrophage CAPN4 could upregulate C/EBP-homologous protein (chop) expression, which increased proinflammatory cytokine release by activating the phosphorylation of transducer of activator of transcription 1 (STAT1) and 3 (STAT3). Overall, these results suggest that CAPN4 increases M1-type and inhibits M2-type macrophage polarization through the chop-STAT1/STAT3 signaling pathway to mediate CVB3-induced myocardial inflammation and injury. CAPN4 may be a novel target for viral myocarditis treatment.
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Affiliation(s)
- Yucheng Wang
- Key Laboratory of Viral Cardiovascular Diseases, Ministry of Health, China & Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Shanghai Medical College of Fudan University, Xuhui District, Shanghai, 200010, China
| | - Minghui Li
- Key Laboratory of Viral Cardiovascular Diseases, Ministry of Health, China & Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Shanghai Medical College of Fudan University, Xuhui District, Shanghai, 200010, China
| | - Jun Chen
- The Third Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310000, Zhejiang, China
| | - Ying Yu
- Department of General Practice, Zhongshan Hospital, Shanghai Medical College of Fudan University, Xuhui District, Shanghai, 200010, China
| | - Yong Yu
- Key Laboratory of Viral Cardiovascular Diseases, Ministry of Health, China & Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Shanghai Medical College of Fudan University, Xuhui District, Shanghai, 200010, China
| | - Hui Shi
- Key Laboratory of Viral Cardiovascular Diseases, Ministry of Health, China & Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Shanghai Medical College of Fudan University, Xuhui District, Shanghai, 200010, China
| | - Xiaoxiao Liu
- Key Laboratory of Viral Cardiovascular Diseases, Ministry of Health, China & Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Shanghai Medical College of Fudan University, Xuhui District, Shanghai, 200010, China
| | - Zhiwei Chen
- Key Laboratory of Viral Cardiovascular Diseases, Ministry of Health, China & Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Shanghai Medical College of Fudan University, Xuhui District, Shanghai, 200010, China
| | - Ruizhen Chen
- Key Laboratory of Viral Cardiovascular Diseases, Ministry of Health, China & Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Shanghai Medical College of Fudan University, Xuhui District, Shanghai, 200010, China.
| | - Junbo Ge
- Key Laboratory of Viral Cardiovascular Diseases, Ministry of Health, China & Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Shanghai Medical College of Fudan University, Xuhui District, Shanghai, 200010, China
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Fang Y, Ma K, Huang YM, Dang Y, Liu Z, Xu Y, Zheng XL, Yang X, Huo Y, Dai X. Fibronectin leucine-rich transmembrane protein 2 drives monocyte differentiation into macrophages via the UNC5B-Akt/mTOR axis. Front Immunol 2023; 14:1162004. [PMID: 37090697 PMCID: PMC10117657 DOI: 10.3389/fimmu.2023.1162004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 03/27/2023] [Indexed: 04/09/2023] Open
Abstract
Upon migrating into the tissues, hematopoietic stem cell (HSC)-derived monocytes differentiate into macrophages, playing a crucial role in determining innate immune responses towards external pathogens and internal stimuli. However, the regulatory mechanisms underlying monocyte-to-macrophage differentiation remain largely unexplored. Here we divulge a previously uncharacterized but essential role for an axon guidance molecule, fibronectin leucine-rich transmembrane protein 2 (FLRT2), in monocyte-to-macrophage maturation. FLRT2 is almost undetectable in human monocytic cell lines, human peripheral blood mononuclear cells (PBMCs), and mouse primary monocytes but significantly increases in fully differentiated macrophages. Myeloid-specific deletion of FLRT2 (Flrt2ΔMyel) contributes to decreased peritoneal monocyte-to-macrophage generation in mice in vivo, accompanied by impaired macrophage functions. Gain- and loss-of-function studies support the promoting effect of FLRT2 on THP-1 cell and human PBMC differentiation into macrophages. Mechanistically, FLRT2 directly interacts with Unc-5 netrin receptor B (UNC5B) via its extracellular domain (ECD) and activates Akt/mTOR signaling. In vivo administration of mTOR agonist MYH1485 reverses the impaired phenotypes observed in Flrt2ΔMyel mice. Together, these results identify FLRT2 as a novel pivotal endogenous regulator of monocyte differentiation into macrophages. Targeting the FLRT2/UNC5B-Akt/mTOR axis may provide potential therapeutic strategies directly relevant to human diseases associated with aberrant monocyte/macrophage differentiation.
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Affiliation(s)
- Yaxiong Fang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Kongyang Ma
- Centre for Infection and Immunity Studies (CIIS), School of Medicine, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Yi-Min Huang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Yuanye Dang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Zhaoyu Liu
- Medical Research Center, Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Yiming Xu
- School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Xi-Long Zheng
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Xiangdong Yang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yongliang Huo
- Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Experimental Animal Center, Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, State Key Laboratory of Respiratory Disease, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, Guangdong, China
- *Correspondence: Xiaoyan Dai, ; Yongliang Huo,
| | - Xiaoyan Dai
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, Guangdong, China
- *Correspondence: Xiaoyan Dai, ; Yongliang Huo,
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7
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Zhong YX, Zhou CC, Zheng YF, Dai HK, Chen RY, Wang YR, Zhan CY, Luo JL, Xie AN. Endoplasmic Reticulum Stress-induced Endothelial Dysfunction Promotes Neointima Formation after Arteriovenous Grafts in Mice on High-fat Diet. Curr Med Sci 2023; 43:115-122. [PMID: 36640244 DOI: 10.1007/s11596-022-2663-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 09/03/2022] [Indexed: 01/15/2023]
Abstract
OBJECTIVE Endothelial dysfunction is one candidate for triggering neointima formation after arteriovenous grafts (AVGs), but the factors mediating this process are unclear. The purpose of this study was to investigate the role of endoplasmic reticulum stress (ERS)-induced endothelial dysfunction in neointima formation following AVGs in high-fat diet (HFD) mice. METHODS CCAAT-enhancer-binding protein-homologous protein (CHOP) knockout (KO) mice were created. Mice were fed with HFD to produce HFD model. AVGs model were applied in the groups of WT ND, WT HFD, and CHOP KO HFD. Human umbilical vein endothelial cells (HUVECs) were cultured with oxidized low density lipoprotein (ox-LDL) (40 mg/L) for the indicated time lengths (0, 6, 12, 24 h). ERS inhibitor tauroursodeoxycholic acid (TUDCA) was used to block ERS. Immunohistochemical staining was used to observe the changes of ICAM1. Changes of ERS were detected by real-time RT-PCR. Protein expression levels and ERS activation were detected by Western blotting. Endothellial cell function was determined by endothelial permeability assay and transendothelial migration assay. RESULTS HFD increased neointima formation in AVGs associated with endothelial dysfunction. At the same time, ERS was increased in endothelial cells (ECs) after AVGs in mice consuming the HFD. In vitro, ox-LDL was found to stimulate ERS, increase the permeability of the EC monolayer, and cause endothelial dysfunction. Blocking ERS with TUDCA or CHOP siRNA reversed the EC dysfunction caused by ox-LDL. In vivo, knockout of CHOP (CHOP KO) protected the function of ECs and decreased neointima formation after AVGs in HFD mice. CONCLUSION Inhibiting ERS in ECs could improve the function of AVGs.
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Affiliation(s)
- Yan-Xia Zhong
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Chen-Chen Zhou
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ying-Fang Zheng
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Hong-Kai Dai
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ren-Yu Chen
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yu-Rou Wang
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Cheng-Ye Zhan
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Jin-Long Luo
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ai-Ni Xie
- Divison of Cardiothoracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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Gardenia fruit and Eucommia leaves combination improves hyperlipidemia and hyperglycemia via pancreatic lipase and AMPK-PPARα and Keap-1-Nrf2-HO-1 regulation. J Funct Foods 2023. [DOI: 10.1016/j.jff.2022.105394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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9
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Huang Y, Ma K, Qin R, Fang Y, Zhou J, Dai X. Pristane attenuates atherosclerosis in Apoe mice via IL-4-secreting regulatory plasma cell-mediated M2 macrophage polarization. Biomed Pharmacother 2022; 155:113750. [DOI: 10.1016/j.biopha.2022.113750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 09/14/2022] [Accepted: 09/22/2022] [Indexed: 11/02/2022] Open
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10
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Antiatherosclerotic effect of dehydrocorydaline on ApoE -/- mice: inhibition of macrophage inflammation. Acta Pharmacol Sin 2022; 43:1408-1418. [PMID: 34552216 PMCID: PMC9160055 DOI: 10.1038/s41401-021-00769-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 08/16/2021] [Indexed: 02/07/2023] Open
Abstract
Despite improvements in cardiovascular disease (CVD) outcomes by cholesterol-lowering statin therapy, the high rate of CVD is still a great concern worldwide. Dehydrocorydaline (DHC) is an alkaloidal compound isolated from the traditional Chinese herb Corydalis yanhusuo. Emerging evidence shows that DHC has anti-inflammatory and antithrombotic benefits, but whether DHC exerts any antiatherosclerotic effects remains unclear. Our study revealed that intraperitoneal (i.p.) injection of DHC in apolipoprotein E-deficient (ApoE-/-) mice not only inhibited atherosclerosis development but also improved aortic compliance and increased plaque stability. In addition, DHC attenuated systemic and vascular inflammation in ApoE-/- mice. As macrophage inflammation plays an essential role in the pathogenesis of atherosclerosis, we next examined the direct effects of DHC on bone marrow-derived macrophages (BMDMs) in vitro. Our RNA-seq data revealed that DHC dramatically decreased the levels of proinflammatory gene clusters. We verified that DHC significantly downregulated proinflammatory interleukin (IL)-1β and IL-18 mRNA levels in a time- and concentration-dependent manner. Furthermore, DHC decreased lipopolysaccharide (LPS)-induced inflammation in BMDMs, as evidenced by the reduced protein levels of CD80, iNOS, NLRP3, IL-1β, and IL-18. Importantly, DHC attenuated LPS-induced activation of p65 and the extracellular signal-regulated kinase 1/2 (ERK1/2) pathway. Thus, we conclude that DHC ameliorates atherosclerosis in ApoE-/- mice by inhibiting inflammation, likely by targeting macrophage p65- and ERK1/2-mediated pathways.
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Wu S, Huang Y, Huang X, Dai X. Lipopolysaccharide Accelerates Neuropilin-1 Protein Degradation by Activating the Large GTPase Dynamin-1 in Macrophages. Inflammation 2022; 45:1162-1173. [DOI: 10.1007/s10753-021-01610-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/07/2021] [Accepted: 12/08/2021] [Indexed: 12/23/2022]
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Chen YJ, Song HY, Zhang ZW, Chen Q, Tang ZP, Gu M. Extracts of Vine Tea Improve Diet-Induced Non-Alcoholic Steatohepatitis Through AMPK-LXRα Signaling. Front Pharmacol 2021; 12:711763. [PMID: 34393793 PMCID: PMC8361841 DOI: 10.3389/fphar.2021.711763] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 07/19/2021] [Indexed: 12/16/2022] Open
Abstract
Chinese vine tea can improve glucose and lipid metabolic disorders. However, its protective effects in non-alcoholic steatohepatitis (NASH) and its underlying molecular mechanisms remain unclear. Liver X receptor α (LXRα) inhibition and adenosine monophosphate-(AMP)-activated protein kinase (AMPK) activation can enhance control of NASH. AMPK activators have also been shown to inactivate LXRα. Here, the anti-NASH effects of vine tea extract (VTE) dosed at 1 g.100 g-1 diet were investigated using NASH mice challenged with a methionine and choline-deficient l-amino acid diet (MCDD) and a high-fat diet (HFD). Pharmacological mechanisms of VTE were explored using TUNEL staining, AMPK inhibition, Western blot, reporter assays, qRT-PCR analyses, and immunofluorescence. VTE treatment improved fatty liver in HFD-induced mice, while it alleviated the progression of NASH including protecting against liver lipid accumulation, steatosis, endoplasmic reticulum stress, apoptosis, inflammation, and functional injury in MCDD-fed mice. VTE reduced the action of hepatic lipogenic genes, F4/80, pro-inflammatory cytokines, CHOP, and cleaved Caspase-3 expression, while promoting expression of fatty acid oxidation genes CPT1α, ß. VTE also enhanced AMPK and blocked LXRα signaling in mouse livers. In vitro results indicated that VTE increased AMPK phosphorylation and reduced LXRα activity in HepG2 cells. Conversely, the antagonistic effect of VTE on LXRα was decreased through AMPK inhibition. Our data suggests that VTE may improve diet-induced NASH, which involves the pharmacological modulation of the AMPK-LXRα signaling pathway.
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Affiliation(s)
- Yu-Jun Chen
- Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hai-Yan Song
- Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zi-Wei Zhang
- Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Qian Chen
- Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zhi-Peng Tang
- Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ming Gu
- Institute of Digestive Disease, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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13
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Przedborski M, Sharon D, Chan S, Kohandel M. A mean-field approach for modeling the propagation of perturbations in biochemical reaction networks. Eur J Pharm Sci 2021; 165:105919. [PMID: 34175448 DOI: 10.1016/j.ejps.2021.105919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/17/2021] [Accepted: 06/20/2021] [Indexed: 12/12/2022]
Abstract
Often, the time evolution of a biochemical reaction network is crucial for determining the effects of combining multiple pharmaceuticals. Here we illustrate a mathematical framework for modeling the dominant temporal behaviour of a complicated molecular pathway or biochemical reaction network in response to an arbitrary perturbation, such as resulting from the administration of a therapeutic agent. The method enables the determination of the temporal evolution of a target protein as the perturbation propagates through its regulatory network. The mathematical approach is particularly useful when the experimental data that is available for characterizing or parameterizing the regulatory network is limited or incomplete. To illustrate the method, we consider the examples of the regulatory networks for the target proteins c-Myc and Chop, which play an important role in venetoclax resistance in acute myeloid leukemia. First we show how the networks that regulate each target protein can be reduced to a mean-field model by identifying the distinct effects that groups of proteins in the regulatory network have on the target protein. Then we show how limited protein-level data can be used to further simplify the mean-field model to pinpoint the dominant effects of the network perturbation on the target protein. This enables a further reduction in the number of parameters in the model. The result is an ordinary differential equation model that captures the temporal evolution of the expression of a target protein when one or more proteins in its regulatory network have been perturbed. Finally, we show how the dominant effects predicted by the mathematical model agree with RNA sequencing data for the regulatory proteins comprising the molecular network, despite the model not having a priori knowledge of this data. Thus, while the approach gives a simplified model for the expression of the target protein, it allows for the interpretation of the effects of the perturbation on the regulatory network itself. This method can be easily extended to sets of target proteins to model components of a larger systems biology model, and provides an approach for partially integrating RNA sequencing data and protein expression data. Moreover, it is a general approach that can be used to study drug effects on specific protein(s) in any disease or condition.
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Affiliation(s)
- Michelle Przedborski
- Department of Applied Mathematics, University of Waterloo, Waterloo, ON, Canada.
| | - David Sharon
- Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Steven Chan
- Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Mohammad Kohandel
- Department of Applied Mathematics, University of Waterloo, Waterloo, ON, Canada
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14
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Attenuating senescence and dead cells accumulation as heart failure therapy: Break the communication networks. Int J Cardiol 2021; 334:72-85. [PMID: 33794236 DOI: 10.1016/j.ijcard.2021.03.061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 03/18/2021] [Accepted: 03/22/2021] [Indexed: 02/03/2023]
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15
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Zhang Z, Wang Y, Shan Y, Zhou R, Yin W. Oroxylin A alleviates immunoparalysis of CLP mice by degrading CHOP through interacting with FBXO15. Sci Rep 2020; 10:19272. [PMID: 33159144 PMCID: PMC7648083 DOI: 10.1038/s41598-020-76285-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 09/22/2020] [Indexed: 11/08/2022] Open
Abstract
Clinical reports have found that with the improvement of treatment, most septic patients are able to survive the severe systemic inflammatory response and to enter the immunoparalysis stage. Considering that immunoparalysis leads to numerous deaths of clinical sepsis patients, alleviation of the occurrence and development of immunoparalysis has become a top priority in the treatment of sepsis. In our study, we investigate the effects of oroxylin A on sepsis in cecal ligation and puncture (CLP) mice. We find that the 60 h + 84 h (30 mg/kg) injection scheme of oroxylin A induce the production of pro-inflammatory factors, and further significantly improves the survival of CLP mice during the middle or late stages of sepsis. Mechanistically, C/EBP-homologous protein (CHOP) is upregulated and plays anti-inflammatory roles to facilitate the development of immunoparalysis in CLP mice. Oroxylin A induces the transcription of E3 ligase F-box only protein 15 gene (fbxo15), and activated FBXO15 protein binds to CHOP and further mediates the degradation of CHOP through the proteasome pathway, which eventually relieves the immunoparalysis of CLP mice. Taken together, these findings suggest oroxylin A relieves the immunoparalysis of CLP mice by degrading CHOP through interacting with FBXO15.
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Affiliation(s)
- Zhaoxin Zhang
- The State Key Lab of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Yun Wang
- The State Key Lab of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Yating Shan
- The State Key Lab of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Ri Zhou
- The State Key Lab of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Wu Yin
- The State Key Lab of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, 210023, China.
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16
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Nie X, Tang W, Zhang Z, Yang C, Qian L, Xie X, Qiang E, Zhao J, Zhao W, Xiao L, Wang N. Procyanidin B2 mitigates endothelial endoplasmic reticulum stress through a PPARδ-Dependent mechanism. Redox Biol 2020; 37:101728. [PMID: 32961442 PMCID: PMC7509074 DOI: 10.1016/j.redox.2020.101728] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 08/02/2020] [Accepted: 09/12/2020] [Indexed: 12/11/2022] Open
Abstract
Hyperglycemia-induced endothelial endoplasmic reticulum (ER) stress is implicated in the pathophysiology of diabetes and its vascular complications. Procyanidins are enriched in many plant foods and have been demonstrated to exert several beneficial effects on diabetes, cardiovascular and other metabolic diseases. In the present study, we investigated the effect of procyanidin B2 (PCB2), the most widely distributed natural procyanidin, on ER stress evoked by high glucose in endothelial cells (ECs) and the underlying mechanisms. We showed that PCB2 mitigated the high glucose-activated ER stress pathways (PERK, IRE1α and ATF6) in human vascular ECs. In addition, we found that PCB2 attenuated endothelial ER stress via the activation of peroxisome proliferator-activated receptor δ (PPARδ). We demonstrated that PCB2 directly bound to and activated PPARδ. Conversely, GSK0660, a selective PPARδ antagonist, attenuated the suppressive effect of PCB2 on the ER stress signal pathway. Functionally, PCB2 ameliorated the high glucose-impaired endothelium-dependent relaxation in mouse aortas. The protective effect of PCB2 on vasodilation was abolished in the aortas pretreated with GSK0660 or those from the EC-specific PPARδ knockout mice. Moreover, the protective effects of PCB2 on ER stress and endothelial dysfunction required the inter-dependent actions of PPARδ and AMPK. Collectively, we demonstrated that PCB2 mitigated ER stress and ameliorated vasodilation via a PPARδ-mediated mechanism beyond its classic action as a scavenger of free radicals. These findings further highlighted the novel roles of procyanidins in intervening the ER stress and metabolic disorders related to endothelial dysfunction.
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Affiliation(s)
- Xin Nie
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Weiqi Tang
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China; Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Zihui Zhang
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Chunmiao Yang
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Lei Qian
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Xinya Xie
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Erjiao Qiang
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Jingyang Zhao
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China; Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Wenfei Zhao
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Lei Xiao
- Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, 710061, China.
| | - Nanping Wang
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, 116044, China.
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17
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Bartko JC, Li Y, Sun G, Halterman MW. Phosphorylation within the bipartite NLS alters the localization and toxicity of the ER stress response factor DDIT3/CHOP. Cell Signal 2020; 74:109713. [PMID: 32673756 DOI: 10.1016/j.cellsig.2020.109713] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/06/2020] [Accepted: 07/09/2020] [Indexed: 02/04/2023]
Abstract
Regulated nuclear-cytoplasmic trafficking is a well-established mechanism utilized by cells to regulate adaptive and maladaptive responses to acute oxidant stress. Commonly associated with endoplasmic reticulum stress, the bZIP transcription factor CCAAT/enhancer-binding protein homologous protein (CHOP/DDIT3) mediates the cellular response to redox stress with effects on cellular growth, differentiation, and survival. We show through functional analyses that CHOP contains a conserved, compound pat4/bipartite nuclear localization signal within the basic DNA-binding domain. Using phylogenetic analyses and mass spectrometry, we now show that Ser107 located within the linker region of the bipartite NLS domain is a substrate for phosphorylation under standard culture conditions. Studies using the S107E phospho-mimic of CHOP indicate that changes in the charge properties at this residue regulate CHOP's nuclear-to-cytoplasmic ratio. And while co-stimulation with the SERCA inhibitor thapsigargin induced injury in cells expressing wild-type CHOP, the S107A point-mutant blocked this response. These findings indicate that phosphorylation within the bipartite NLS exerts regulatory effects on both the subcellular localization and toxic potential of DDIT3/CHOP. Future studies geared towards defining the relevant kinase/phosphatase networks that converge on the phosphorylation-regulated NLS (prNLS) phosphoepitope may provide an opportunity to constrain cellular damage in the context of acute ER stress.
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Affiliation(s)
- Jonathan C Bartko
- Departments of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Yinghui Li
- Department of Neurology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - George Sun
- Department of Neurology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Marc W Halterman
- Department of Neurology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States; Department of Neuroscience, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States.
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18
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Manuel AM, Walla MD, Dorn MT, Tanis RM, Piroli GG, Frizzell N. Fumarate and oxidative stress synergize to promote stability of C/EBP homologous protein in the adipocyte. Free Radic Biol Med 2020; 148:70-82. [PMID: 31883977 PMCID: PMC6961135 DOI: 10.1016/j.freeradbiomed.2019.12.037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 12/22/2019] [Accepted: 12/24/2019] [Indexed: 12/13/2022]
Abstract
C/EBP homologous protein (CHOP) is a transcription factor that is elevated in adipose tissue across many models of diabetes and metabolic stress. Although increased CHOP levels are associated with the terminal response to endoplasmic reticulum stress and apoptosis, there is no evidence for CHOP mediated apoptosis in the adipose tissue during diabetes. CHOP protein levels increase in parallel with protein succination, a fumarate derived cysteine modification, in the adipocyte during metabolic stress. We investigated the factors contributing to sustained CHOP proteins levels in the adipocyte, with an emphasis on the regulation of CHOP protein turnover by metabolite-driven modification of Keap1 cysteines. CHOP protein stability was investigated in conditions of nutrient stress due to high glucose or elevated fumarate (fumarase knockdown model); where cysteine succination is specifically elevated. CHOP protein turnover is significantly reduced in models of elevated glucose and fumarate with a ~30% increase in CHOP stability (p > 0.01), in part due to decreased CHOP phosphorylation. Sustained CHOP levels occur in parallel with elevated heme-oxygenase-1, a production of increased Nrf2 transcriptional activity and Keap1 modification. While Keap1 is directly succinated in the presence of excess fumarate derived from genetic knockdown of fumarase (fumarate levels are elevated >20-fold), it is the oxidative modification of Keap1 that predominates in adipocytes matured in high glucose (fumarate increases 4-5 fold). Elevated fumarate indirectly regulates CHOP stability through the induction of oxidative stress. The antioxidant N-acetylcysteine (NAC) reduces fumarate levels, protein succination and CHOP levels in adipocytes matured in high glucose. Elevated CHOP does not contribute elevated apoptosis in adipocytes, but plays a redox-dependent role in decreasing the adipocyte secretion of interleukin-13, an anti-inflammatory chemokine. NAC treatment restores adipocyte IL-13 secretion, confirming the redox-dependent regulation of a potent anti-inflammatory eotaxin. This study demonstrates that physiological increases in the metabolite fumarate during high glucose exposure contributes to the presence of oxidative stress and sustained CHOP levels in the adipocyte during diabetes. The results reveal a novel metabolic link between mitochondrial metabolic stress and reduced anti-inflammatory adipocyte signaling as a consequence of reduced CHOP protein turnover.
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Affiliation(s)
- Allison M Manuel
- Department of Pharmacology, Physiology & Neuroscience, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Michael D Walla
- Mass Spectrometry Center, Department of Chemistry & Biochemistry, University of South Carolina, Columbia, SC, 29205, USA
| | - Margaret T Dorn
- Department of Pharmacology, Physiology & Neuroscience, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Ross M Tanis
- Department of Pharmacology, Physiology & Neuroscience, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Gerardo G Piroli
- Department of Pharmacology, Physiology & Neuroscience, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Norma Frizzell
- Department of Pharmacology, Physiology & Neuroscience, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA.
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19
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Steinberg GR, Carling D. AMP-activated protein kinase: the current landscape for drug development. Nat Rev Drug Discov 2020; 18:527-551. [PMID: 30867601 DOI: 10.1038/s41573-019-0019-2] [Citation(s) in RCA: 397] [Impact Index Per Article: 99.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Since the discovery of AMP-activated protein kinase (AMPK) as a central regulator of energy homeostasis, many exciting insights into its structure, regulation and physiological roles have been revealed. While exercise, caloric restriction, metformin and many natural products increase AMPK activity and exert a multitude of health benefits, developing direct activators of AMPK to elicit beneficial effects has been challenging. However, in recent years, direct AMPK activators have been identified and tested in preclinical models, and a small number have entered clinical trials. Despite these advances, which disease(s) represent the best indications for therapeutic AMPK activation and the long-term safety of such approaches remain to be established.
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Affiliation(s)
- Gregory R Steinberg
- Centre for Metabolism, Obesity and Diabetes Research, Department of Medicine and Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada.
| | - David Carling
- Cellular Stress Group, Medical Research Council London Institute of Medical Sciences, Hammersmith Hospital, Imperial College, London, UK
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20
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Shati AA. Resveratrol protects against cadmium chloride-induced hippocampal neurotoxicity by inhibiting ER stress and GAAD 153 and activating sirtuin 1/AMPK/Akt. ENVIRONMENTAL TOXICOLOGY 2019; 34:1340-1353. [PMID: 31433112 DOI: 10.1002/tox.22835] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 07/30/2019] [Accepted: 08/02/2019] [Indexed: 06/10/2023]
Abstract
This study investigated whether the apoptotic effect induced by cadmium chloride (CdCl2 ) in rat's hippocampi and neuroprotection afforded by resveratrol (RES) are mediated by modulation of ER stress and involve sirtuin 1 (SIRT1)/AMPK/Akt axis. Adult male Wistar rats were divided into four groups (n = 24/group) as control, control + RES (300 mg/kg), CdCl2 (5 mg/kg), and CdCl2 + RES. All treatments were conducted orally for 45 days. Also, cultured hippocampal cells were treated with CdCl2 in the presence or absence of RES and with or without preincubation with SIRT1, AMPK, or PI3K inhibitors. CdCl2 impaired retention and spatial memories of rats and reduced levels and activities of SIRT1 and inhibited AMPK/Akt axis in their hippocamapi where SIRT1 was the upstream regulator. It also enahnced hippocampal levels of reactive oxygen species (ROS) and expression of caspase-12 and caspase-3, depleted glutathione (GSH) levels, and activated GRP78, activating transcription factor-6, GAAD 153, X-box binding protein-1 arms of ER stress. On the contrary, RES coadminsitration completley abolished all these events. Interstingly and in control rats, RES not only increased levels of GSH, but also enhenced protein levels of B-cell lymphoma 2 (Bcl-2) and dwonregulated GAAD 153. In both control and CdCl2 -treated rats, pharmacological inhibtion of SIRT1, AMPK, and Akt compleltely abolished all effects afforded by RES. In conclusion, CdCl2 -induced hippocampal apopotis is associated with reduction of SIRT1/AMPK/Akt activity levels, ROS generation, downregulation of Bcl-2, and activities, activation of ER stress, and GAAD 153, whereas RES is able to reverse these effects through activation of SIRT1/AMPK/Akt.
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Affiliation(s)
- Ali A Shati
- Biology Department, College of Science, King Khalid University, Abha, Saudi Arabia
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21
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Jansen T, Kröller-Schön S, Schönfelder T, Foretz M, Viollet B, Daiber A, Oelze M, Brandt M, Steven S, Kvandová M, Kalinovic S, Lagrange J, Keaney JF, Münzel T, Wenzel P, Schulz E. α1AMPK deletion in myelomonocytic cells induces a pro-inflammatory phenotype and enhances angiotensin II-induced vascular dysfunction. Cardiovasc Res 2019; 114:1883-1893. [PMID: 29982418 DOI: 10.1093/cvr/cvy172] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 07/02/2018] [Indexed: 12/17/2022] Open
Abstract
Aims Immune cell function involves energy-dependent processes including growth, proliferation, and cytokine production. Since the AMP-activated protein kinase (AMPK) is a crucial regulator of intracellular energy homeostasis, its expression and activity may also affect innate and adaptive immune cell responses. Therefore, we aimed to investigate the consequences of α1AMPK deletion in myelomonocytic cells on vascular function, inflammation, and hypertension during chronic angiotensin II (ATII) treatment. Methods and results We generated a mouse strain with α1AMPK deletion in lysozyme M+ myelomonocytic cells. Compared to controls, chronic ATII infusion (1 mg/kg/day for 7 days) lead to increased vascular oxidative stress and aggravated endothelial dysfunction in LysM-Cre+ x α1AMPKfl/fl mice. This was accompanied by an increased aortic infiltration of CD11b+F4/80+ macrophages and enhanced pro-inflammatory cytokine release (tumour necrosis factor-alpha, interferon-gamma, and interleukin-6). Mechanistically, we found that increased expression of C-C chemokine receptor 2 (CCR2) in α1AMPK deficient myelomonocytic cells facilitated their recruitment to the vascular wall. In addition, expression of the ATII receptor type 1a and the oxidative burst was increased in these cells, indicating an increased susceptibility towards pro-oxidant stimuli. Conclusions In summary, α1AMPK deletion in myelomonocytic cells aggravates vascular oxidative stress and dysfunction by enhancing their recruitment to the vascular wall and increasing their susceptibility towards pro-oxidant stimuli. Our observations suggest that metabolic control in myelomonocytic cells has profound implications for their inflammatory phenotype and may trigger the development of vascular disease.
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Affiliation(s)
- Thomas Jansen
- Department of Cardiology 1, Center for Cardiology, Universitätsmedizin Mainz, Mainz, Germany
| | - Swenja Kröller-Schön
- Department of Cardiology 1, Center for Cardiology, Universitätsmedizin Mainz, Mainz, Germany
| | - Tanja Schönfelder
- Center for Thrombosis and Hemostasis (CTH), Universitätsmedizin Mainz, Mainz, Germany
| | - Marc Foretz
- Institut Cochin, INSERM U1016, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris cité, 24 rue du faubourg Saint Jacques, Paris, France
| | - Benoit Viollet
- Institut Cochin, INSERM U1016, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris cité, 24 rue du faubourg Saint Jacques, Paris, France
| | - Andreas Daiber
- Department of Cardiology 1, Center for Cardiology, Universitätsmedizin Mainz, Mainz, Germany
| | - Matthias Oelze
- Department of Cardiology 1, Center for Cardiology, Universitätsmedizin Mainz, Mainz, Germany
| | - Moritz Brandt
- Department of Cardiology 1, Center for Cardiology, Universitätsmedizin Mainz, Mainz, Germany.,Center for Thrombosis and Hemostasis (CTH), Universitätsmedizin Mainz, Mainz, Germany
| | - Sebastian Steven
- Department of Cardiology 1, Center for Cardiology, Universitätsmedizin Mainz, Mainz, Germany.,Center for Thrombosis and Hemostasis (CTH), Universitätsmedizin Mainz, Mainz, Germany
| | - Miroslava Kvandová
- Department of Cardiology 1, Center for Cardiology, Universitätsmedizin Mainz, Mainz, Germany
| | - Sanela Kalinovic
- Department of Cardiology 1, Center for Cardiology, Universitätsmedizin Mainz, Mainz, Germany
| | - Jeremy Lagrange
- Center for Thrombosis and Hemostasis (CTH), Universitätsmedizin Mainz, Mainz, Germany
| | - John F Keaney
- Division of Cardiovascular Medicine, UMass Medical School, 55 Lake Avenue North, Worcester, MA, USA
| | - Thomas Münzel
- Department of Cardiology 1, Center for Cardiology, Universitätsmedizin Mainz, Mainz, Germany
| | - Philip Wenzel
- Department of Cardiology 1, Center for Cardiology, Universitätsmedizin Mainz, Mainz, Germany.,Center for Thrombosis and Hemostasis (CTH), Universitätsmedizin Mainz, Mainz, Germany
| | - Eberhard Schulz
- Department of Cardiology 1, Center for Cardiology, Universitätsmedizin Mainz, Mainz, Germany
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22
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Huang XT, Liu W, Zhou Y, Sun M, Sun CC, Zhang CY, Tang SY. Endoplasmic reticulum stress contributes to NMDA-induced pancreatic β-cell dysfunction in a CHOP-dependent manner. Life Sci 2019; 232:116612. [PMID: 31260687 DOI: 10.1016/j.lfs.2019.116612] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/17/2019] [Accepted: 06/27/2019] [Indexed: 01/09/2023]
Abstract
AIMS Accumulating evidence suggest that endoplasmic reticulum (ER) stress is an important mechanism underlying the development of diabetes. We have reported that sustained treatment with N-methyl-d-aspartate (NMDA) results in apoptotic β-cell death and impairs insulin secretion. However, the molecular mechanism responsible for NMDA-induced β-cell dysfunction remains largely obscure. Thus, this study aimed to determine whether sustained activation of NMDA receptors (NMDARs) causes β-cell dysfunction through ER stress. MAIN METHODS Primary mouse islets and MIN6 mouse pancreatic β-cells were treated with NMDA for 24 h or high-glucose for 72 h. After the treatment, glucose-stimulated insulin secretion (GSIS) and the expression of ER stress markers were measured, respectively. In vivo, the expression of ER stress markers was measured in the pancreas of diabetic mice treated with or without NMDARs inhibitor Memantine. KEY FINDINGS NMDA treatment caused an increase in the expression of ER stress markers (ATF4, CHOP, GRP78, and Xbp1s) in primary islets. While, tauroursodeoxycholic acid (TUDCA), an inhibitor of ER stress, significantly attenuated NMDA-induced β-cell dysfunction, including the loss of glucose-stimulated insulin secretion and reduction of pancreas duodenum homeobox factor-1 (Pdx-1) mRNA expression, a transcription factor regulating insulin synthesis. Besides, NMDA-induced ER stress strongly promoted pro-inflammatory cytokines synthesis (IL-1β and TNF-α) in β cells. Interestingly, knockdown of CHOP attenuated β-cell dysfunction evoked by NMDA. Furthermore, we demonstrated that blockade of NMDARs ameliorated high-glucose-induced ER stress in vitro and in vivo. SIGNIFICANCE This study confirms that ER stress is actively involved in the activation of NMDARs-related β-cell dysfunction.
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Affiliation(s)
- Xiao-Ting Huang
- Xiangya Nursing School, Central South University, Changsha, Hunan, China
| | - Wei Liu
- Xiangya Nursing School, Central South University, Changsha, Hunan, China
| | - Yong Zhou
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Mei Sun
- Xiangya Nursing School, Central South University, Changsha, Hunan, China
| | - Chen-Chen Sun
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Chen-Yu Zhang
- Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Si-Yuan Tang
- Xiangya Nursing School, Central South University, Changsha, Hunan, China.
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Salminen A, Kauppinen A, Kaarniranta K. AMPK activation inhibits the functions of myeloid-derived suppressor cells (MDSC): impact on cancer and aging. J Mol Med (Berl) 2019; 97:1049-1064. [PMID: 31129755 PMCID: PMC6647228 DOI: 10.1007/s00109-019-01795-9] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/10/2019] [Accepted: 05/08/2019] [Indexed: 02/06/2023]
Abstract
AMP-activated protein kinase (AMPK) has a crucial role not only in the regulation of tissue energy metabolism but it can also control immune responses through its cooperation with immune signaling pathways, thus affecting immunometabolism and the functions of immune cells. It is known that AMPK signaling inhibits the activity of the NF-κB system and thus suppresses pro-inflammatory responses. Interestingly, AMPK activation can inhibit several major immune signaling pathways, e.g., the JAK-STAT, NF-κB, C/EBPβ, CHOP, and HIF-1α pathways, which induce the expansion and activation of myeloid-derived suppressor cells (MDSC). MDSCs induce an immunosuppressive microenvironment in tumors and thus allow the escape of tumor cells from immune surveillance. Chronic inflammation has a key role in the expansion and activation of MDSCs in both tumors and inflammatory disorders. The numbers of MDSCs also significantly increase during the aging process concurrently with the immunosenescence associated with chronic low-grade inflammation. Increased fatty acid oxidation and lactate produced by aerobic glycolysis are important immunometabolic enhancers of MDSC functions. However, it seems that AMPK signaling regulates the functions of MDSCs in a context-dependent manner. Currently, the activators of AMPK signaling are promising drug candidates for cancer therapy and possibly for the extension of healthspan and lifespan. We will describe in detail the AMPK-mediated regulation of the signaling pathways controlling the expansion and activation of immunosuppressive MDSCs. We will propose that the beneficial effects mediated by AMPK activation, e.g., in cancers and the aging process, could be induced by the inhibition of MDSC functions.
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Affiliation(s)
- Antero Salminen
- Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland.
| | - Anu Kauppinen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland
| | - Kai Kaarniranta
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland.,Department of Ophthalmology, Kuopio University Hospital, P.O. Box 100, FI-70029, Kuopio, Finland
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24
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Jia Y, Long S, Jiang N, Shan Z, Lu Y, Han F, Yu J, Feng L. Oxymatrine ameliorates agomelatine-induced hepatocyte injury through promoting proteasome-mediated CHOP degradation. Biomed Pharmacother 2019; 114:108784. [PMID: 30925456 DOI: 10.1016/j.biopha.2019.108784] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 03/03/2019] [Accepted: 03/13/2019] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The novel antidepressant drug agomelatine has been observed to cause adverse effect of hepatotoxicity in clinical applications. This study was designed to explore protective agents and investigated the underlying mechanism on L02 cells. METHOD L02 cells were treated with agomelatine and oxymatrine (OMT) and cell apoptosis were analyzed through flow cytometric analysis, CCK-8 assay and TUNEL assay. In a separate experiment, the expressions of ER stress-related proteins were determined by western blot. In addition, MG132, chloroquine (CQ) and bafilomycinA1(BafA1) were used to investigate the potential pathway participating in CHOP degradation. RESULTS OMT significantly rescued agomelatine-induced hepatocyte apoptosis. Agomelatine treatment resulted in accumulation of CHOP protein in L02 cells, and this phenomenon could be significantly reduced by OMT, whereas abolished by MG132 treatment. CONCLUSION We have demonstrated for the first time that OMT ameliorates the hepatocyte toxicity induced by agomelatine through decreasing CHOP on protein level. The underlying mechanism was proved to involve the molecular events that OMT promotes CHOP degradation via proteasome pathway. Overall, these results suggest that using OMT in combination with agomelatine may provide a safety strategy for clinical depression treatment.
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Affiliation(s)
- Yina Jia
- Department of Pharmacology, Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region, 750004, China
| | - Sen Long
- Department of Pharmacy, Hangzhou Seventh People's Hospital, Mental Health Center Zhejiang University School of Medicine, Hangzhou, 310013, China
| | - Nan Jiang
- Key Laboratory of Cardiovascular & Cerebrovascular Medicine, School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China
| | - Zhe Shan
- Institute of Translational Medicine, Zhejiang University, Hangzhou, 310058, China
| | - Yingmei Lu
- Department of Neurobiology, Nanjing Medical University, Nanjing, 211166, China
| | - Feng Han
- Key Laboratory of Cardiovascular & Cerebrovascular Medicine, School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China
| | - Jianqiang Yu
- Department of Pharmacology, Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region, 750004, China.
| | - Lili Feng
- Key Laboratory of Cardiovascular & Cerebrovascular Medicine, School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
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25
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Yuan T, Yang T, Chen H, Fu D, Hu Y, Wang J, Yuan Q, Yu H, Xu W, Xie X. New insights into oxidative stress and inflammation during diabetes mellitus-accelerated atherosclerosis. Redox Biol 2019; 20:247-260. [PMID: 30384259 PMCID: PMC6205410 DOI: 10.1016/j.redox.2018.09.025] [Citation(s) in RCA: 379] [Impact Index Per Article: 75.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/12/2018] [Accepted: 09/29/2018] [Indexed: 02/06/2023] Open
Abstract
Oxidative stress and inflammation interact in the development of diabetic atherosclerosis. Intracellular hyperglycemia promotes production of mitochondrial reactive oxygen species (ROS), increased formation of intracellular advanced glycation end-products, activation of protein kinase C, and increased polyol pathway flux. ROS directly increase the expression of inflammatory and adhesion factors, formation of oxidized-low density lipoprotein, and insulin resistance. They activate the ubiquitin pathway, inhibit the activation of AMP-protein kinase and adiponectin, decrease endothelial nitric oxide synthase activity, all of which accelerate atherosclerosis. Changes in the composition of the gut microbiota and changes in microRNA expression that influence the regulation of target genes that occur in diabetes interact with increased ROS and inflammation to promote atherosclerosis. This review highlights the consequences of the sustained increase of ROS production and inflammation that influence the acceleration of atherosclerosis by diabetes. The potential contributions of changes in the gut microbiota and microRNA expression are discussed.
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Affiliation(s)
- Ting Yuan
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Ting Yang
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Huan Chen
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China.
| | - Danli Fu
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Yangyang Hu
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Jing Wang
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Qing Yuan
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Hong Yu
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Wenfeng Xu
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China
| | - Xiang Xie
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan Province 646000, China.
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26
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Tamargo-Gómez I, Mariño G. AMPK: Regulation of Metabolic Dynamics in the Context of Autophagy. Int J Mol Sci 2018; 19:ijms19123812. [PMID: 30501132 PMCID: PMC6321489 DOI: 10.3390/ijms19123812] [Citation(s) in RCA: 161] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 11/20/2018] [Accepted: 11/24/2018] [Indexed: 02/07/2023] Open
Abstract
Eukaryotic cells have developed mechanisms that allow them to link growth and proliferation to the availability of energy and biomolecules. AMPK (adenosine monophosphate-activated protein kinase) is one of the most important molecular energy sensors in eukaryotic cells. AMPK activity is able to control a wide variety of metabolic processes connecting cellular metabolism with energy availability. Autophagy is an evolutionarily conserved catabolic pathway whose activity provides energy and basic building blocks for the synthesis of new biomolecules. Given the importance of autophagic degradation for energy production in situations of nutrient scarcity, it seems logical that eukaryotic cells have developed multiple molecular links between AMPK signaling and autophagy regulation. In this review, we will discuss the importance of AMPK activity for diverse aspects of cellular metabolism, and how AMPK modulates autophagic degradation and adapts it to cellular energetic status. We will explain how AMPK-mediated signaling is mechanistically involved in autophagy regulation both through specific phosphorylation of autophagy-relevant proteins or by indirectly impacting in the activity of additional autophagy regulators.
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Affiliation(s)
- Isaac Tamargo-Gómez
- Instituto de Investigación Sanitaria del Principado de Asturias, 33011 Oviedo, Spain.
- Departamento de Biología Funcional, Universidad de Oviedo, 33011 Oviedo, Spain.
| | - Guillermo Mariño
- Instituto de Investigación Sanitaria del Principado de Asturias, 33011 Oviedo, Spain.
- Departamento de Biología Funcional, Universidad de Oviedo, 33011 Oviedo, Spain.
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27
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Ni XQ, Lu WW, Zhang JS, Zhu Q, Ren JL, Yu YR, Liu XY, Wang XJ, Han M, Jing Q, Du J, Tang CS, Qi YF. Inhibition of endoplasmic reticulum stress by intermedin1-53 attenuates angiotensin II-induced abdominal aortic aneurysm in ApoE KO Mice. Endocrine 2018; 62:90-106. [PMID: 29943223 DOI: 10.1007/s12020-018-1657-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 06/15/2018] [Indexed: 12/23/2022]
Abstract
Endoplasmic reticulum stress (ERS) is involved in the development of abdominal aortic aneurysm (AAA). Since bioactive peptide intermedin (IMD)1-53 protects against AAA formation, here we investigated whether IMD1-53 attenuates AAA by inhibiting ERS. AAA model was induced by angiotensin II (AngII) in ApoE KO mouse background. AngII-treated mouse aortas showed increased ERS gene transcription of caspase12, eukaryotic translation initiation factor 2a (eIf2a) and activating transcription factor 4(ATF4).The protein level of ERS marker glucose regulated protein 94(GRP94), ATF4 and C/EBP homologous protein 10(CHOP) was also up-regulated by AngII. Increased ERS levels were accompanied by severe VSMC apoptosis in human AAA aorta. In vivo administration of IMD1-53 greatly reduced AngII-induced AAA and abrogated the activation of ERS. To determine whether IMD inhibited AAA by ameliorating ERS, we used 2 non-selective ERS inhibitors phenyl butyrate (4-PBA) and taurine (TAU). Similar to IMD, PBA, and TAU significantly reduced the incidence of AAA and AAA-related pathological disorders. In vitro, AngII infusion up-regulated CHOP, caspase12 expression and led to VSMC apoptosis. IMD siRNA aggravated the CHOP, caspase12-mediated VSMC apoptosis, which was abolished by ATF4 silencing. IMD infusion promoted the phosphorylation of adenosine 5'-monophosphate (AMP)-activated protein kinase (AMPK) in aortas in ApoE KO mice, and the AMPK inhibitor compound C abolished the protective effect of IMD on VSMC ERS and apoptosis induced by AngII. In conclusion, IMD may protect against AAA formation by inhibiting ERS via activating AMPK phosphorylation.
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MESH Headings
- Adenylate Kinase/metabolism
- Angiotensin II
- Animals
- Aortic Aneurysm, Abdominal/chemically induced
- Aortic Aneurysm, Abdominal/drug therapy
- Aortic Aneurysm, Abdominal/metabolism
- Apolipoproteins E/genetics
- Apolipoproteins E/metabolism
- Endoplasmic Reticulum Stress/drug effects
- Mice
- Mice, Knockout
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Peptide Hormones/pharmacology
- Peptide Hormones/therapeutic use
- Phosphorylation/drug effects
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Affiliation(s)
- Xian-Qiang Ni
- Laboratory of Cardiovascular Bioactive Molecule, School of Basic Medical Sciences, Peking University, 100083, Beijing, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, 100083, Beijing, China
- Department of Microbiology and Parasitology, School of Basic Medical Science, Peking University, 100083, Beijing, China
| | - Wei-Wei Lu
- Laboratory of Cardiovascular Bioactive Molecule, School of Basic Medical Sciences, Peking University, 100083, Beijing, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, 100083, Beijing, China
- Department of Microbiology and Parasitology, School of Basic Medical Science, Peking University, 100083, Beijing, China
| | - Jin-Sheng Zhang
- Laboratory of Cardiovascular Bioactive Molecule, School of Basic Medical Sciences, Peking University, 100083, Beijing, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, 100083, Beijing, China
- Department of Microbiology and Parasitology, School of Basic Medical Science, Peking University, 100083, Beijing, China
| | - Qing Zhu
- Laboratory of Cardiovascular Bioactive Molecule, School of Basic Medical Sciences, Peking University, 100083, Beijing, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, 100083, Beijing, China
- Department of Microbiology and Parasitology, School of Basic Medical Science, Peking University, 100083, Beijing, China
| | - Jin-Ling Ren
- Laboratory of Cardiovascular Bioactive Molecule, School of Basic Medical Sciences, Peking University, 100083, Beijing, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, 100083, Beijing, China
- Department of Microbiology and Parasitology, School of Basic Medical Science, Peking University, 100083, Beijing, China
| | - Yan-Rong Yu
- Department of Microbiology and Parasitology, School of Basic Medical Science, Peking University, 100083, Beijing, China
| | - Xiu-Ying Liu
- Key Laboratory of Genetic Network Biology, Collaborative Innovation Center of Genetics and Development, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Xiu-Jie Wang
- Key Laboratory of Genetic Network Biology, Collaborative Innovation Center of Genetics and Development, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Mei Han
- Department of Biochemistry and Molecular Biology, College of Basic Medicine, Key Laboratory of Medical Biotechnology of Hebei Province, Hebei Medical University, 050017, Shijiazhuang, China
| | - Qing Jing
- Key Laboratory of Stem Cell Biology, Shanghai Institutes for Biological Science, Chinese Academy of Science, Shanghai, China
| | - Jie Du
- Key Laboratory of Remodeling-Related Cardiovascular Diseases, Beijing Institute of Heart, Lung, and Blood Vessel Diseases, Beijing An Zhen Hospital, Ministry of Education, Capital Medical University, 100029, Beijing, China
| | - Chao-Shu Tang
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, 100083, Beijing, China
| | - Yong-Fen Qi
- Laboratory of Cardiovascular Bioactive Molecule, School of Basic Medical Sciences, Peking University, 100083, Beijing, China.
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University Health Science Center, 100083, Beijing, China.
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28
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Zhong X, Chen B, Yang L, Yang Z. Molecular and physiological roles of the adaptor protein CARD9 in immunity. Cell Death Dis 2018; 9:52. [PMID: 29352133 PMCID: PMC5833731 DOI: 10.1038/s41419-017-0084-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 10/11/2017] [Accepted: 10/16/2017] [Indexed: 12/11/2022]
Abstract
CARD9 is a caspase recruitment domain-containing signaling protein that plays a critical role in innate and adaptive immunity. It has been widely demonstrated that CARD9 adaptor allows pattern recognition receptors to induce NF-κB and MAPK activation, which initiates a “downstream” inflammation cytokine cascade and provides effective protection against microbial invasion, especially fungal infection. Here our aim is to update existing paradigms and summarize the most recent findings on the CARD9 signaling pathway, revealing significant mechanistic insights into the pathogenesis of CARD9 deficiency. We also discuss the effect of CARD9 genetic mutations on the in vivo immune response, and highlight clinical advances in non-infection inflammation.
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Affiliation(s)
| | - Bin Chen
- Surgery Department, First Affiliated Hospital of Gannan Medical University, Gannan Medical University, Ganzhou, China
| | - Liang Yang
- Fuzhou Medical College of Nanchang University, Jiangxi, China
| | - Zhiwen Yang
- Department of Pharmacy, Songjiang Hospital Affiliated Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China.
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29
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Cai Z, Liu B, Wei J, Fu Z, Wang Y, Wang Y, Shen J, Jia L, Su S, Wang X, Lin X, Chen H, Li F, Wang J, Xiang M. Deficiency of CCAAT/enhancer-binding protein homologous protein (CHOP) prevents diet-induced aortic valve calcification in vivo. Aging Cell 2017; 16:1334-1341. [PMID: 28891115 PMCID: PMC5676062 DOI: 10.1111/acel.12674] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/13/2017] [Indexed: 12/22/2022] Open
Abstract
Aortic valve (AoV) calcification is common in aged populations. Its subsequent aortic stenosis has been linked with increased morbidity, but still has no effective pharmacological intervention. Our previous data show endoplasmic reticulum (ER) stress is involved in AoV calcification. Here, we investigated whether deficiency of ER stress downstream effector CCAAT/enhancer-binding protein homology protein (CHOP) may prevent development of AoV calcification. AoV calcification was evaluated in Apoe-/- mice (n = 10) or in mice with dual deficiencies of ApoE and CHOP (Apoe-/- CHOP-/- , n = 10) fed with Western diet for 24 weeks. Histological and echocardiographic analysis showed that genetic ablation of CHOP attenuated AoV calcification, pro-calcification signaling activation, and apoptosis in the leaflets of Apoe-/- mice. In cultured human aortic valvular interstitial cells (VIC), we found oxidized low-density lipoprotein (oxLDL) promoted apoptosis and osteoblastic differentiation of VIC via CHOP activation. Using conditioned media (CM) from oxLDL-treated VIC, we further identified that oxLDL triggered osteoblastic differentiation of VIC via paracrine pathway, while depletion of apoptotic bodies (ABs) in CM suppressed the effect. CM from oxLDL-exposed CHOP-silenced cells prevented osteoblastic differentiation of VIC, while depletion of ABs did not further enhance this protective effect. Overall, our study indicates that CHOP deficiency protects against Western diet-induced AoV calcification in Apoe-/- mice. CHOP deficiency prevents oxLDL-induced VIC osteoblastic differentiation via preventing VIC-derived ABs releasing.
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Affiliation(s)
- Zhejun Cai
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Baoqing Liu
- Department of Cardiovascular SurgeryUnion Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Jia Wei
- Department of UrologyChildren's Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Zurong Fu
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Yidong Wang
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Yaping Wang
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Jian Shen
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Liangliang Jia
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Shengan Su
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Xiaoya Wang
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Xiaoping Lin
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Han Chen
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Fei Li
- Department of Cardiovascular SurgeryUnion Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Jian'an Wang
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
| | - Meixiang Xiang
- Department of CardiologySecond Affiliated Hospital, Zhejiang University School of MedicineHangzhouChina
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30
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Yang Y, Liu L, Naik I, Braunstein Z, Zhong J, Ren B. Transcription Factor C/EBP Homologous Protein in Health and Diseases. Front Immunol 2017; 8:1612. [PMID: 29230213 PMCID: PMC5712004 DOI: 10.3389/fimmu.2017.01612] [Citation(s) in RCA: 134] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Accepted: 11/07/2017] [Indexed: 12/13/2022] Open
Abstract
C/EBP homologous protein (CHOP), known also as DNA damage-inducible transcript 3 and as growth arrest and DNA damage-inducible protein 153 (GADD153), is induced in response to certain stressors. CHOP is universally acknowledged as a main conduit to endoplasmic reticulum stress-induced apoptosis. Ongoing research established the existence of CHOP-mediated apoptosis signaling networks, for which novel downstream targets are still being determined. However, there are studies that contradict this notion and assert that apoptosis is not the only mechanism by which CHOP plays in the development of pathologies. In this review, insights into the roles of CHOP in pathophysiology are summarized at the molecular and cellular levels. We further focus on the newest advances that implicate CHOP in human diseases including cancer, diabetes, neurodegenerative disorders, and notably, fibrosis.
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Affiliation(s)
- Yuan Yang
- Center for Molecular Medicine, Medical School of Yangtze University, Jingzhou, China.,Department of Radiology, Medical School of Yangtze University, Jingzhou, China
| | - Lian Liu
- Department of Pharmacology, Medical School of Yangtze University, Jingzhou, China
| | - Ishan Naik
- Cardiovascular Research Institute, Case Western Reserve University, Cleveland, OH, United States
| | - Zachary Braunstein
- Boonshoft School of Medicine, Wright State University, Dayton, OH, United States
| | - Jixin Zhong
- Cardiovascular Research Institute, Case Western Reserve University, Cleveland, OH, United States
| | - Boxu Ren
- Center for Molecular Medicine, Medical School of Yangtze University, Jingzhou, China.,Department of Radiology, Medical School of Yangtze University, Jingzhou, China
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31
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Zhao Q, Zhou D, You H, Lou B, Zhang Y, Tian Y, Guo N, Chen X, Liu Y, Wu Y, Yuan Z, Zhou J. IFN-γ aggravates neointimal hyperplasia by inducing endoplasmic reticulum stress and apoptosis in macrophages by promoting ubiquitin-dependent liver X receptor-α degradation. FASEB J 2017; 31:5321-5331. [PMID: 28798155 DOI: 10.1096/fj.201700327r] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 07/25/2017] [Indexed: 12/22/2022]
Abstract
Neointimal hyperplasia is the main cause of restenosis after percutaneous coronary interventions (PCIs). Both IFN-γ and macrophages play nonredundant roles in the pathogenesis of vascular intimal hyperplasia; however, the underlying mechanisms remain elusive and must be further investigated. In mouse peritoneal macrophages, IFN-γ significantly accelerated degradation and up-regulated polyubiquitination of liver X receptor (LXR)-α. Signal transducer and activator of transcription 1 (STAT1) inhibitor, fludarabine, and PIAS1 knockdown reduced ubiquitination and increased the expression of LXR-α in IFN-γ-treated macrophages. IFN-γ also increased the expression of endoplasmic reticulum (ER) stress-related proteins, including p-PERK, p-eIIF2α, and CCAAT-enhancer-binding protein homologous protein (CHOP), as well as apoptosis of macrophages. Treatment with ER stress inhibitor, 4-phenylbutyric acid (4-PBA), and LXR agonist, T0901317 (T0), alleviated IFN-γ-induced apoptosis in macrophages. Neointimal hyperplasia was significant after carotid ligation for 4 wk in ApoE-/- mice. IFN-γ mAb, T0, and 4-PBA treatment not only significantly attenuated neointimal hyperplasia but also decreased CD68+TUNEL+ double-positive macrophages in the hyperplastic neointima. Moreover, after 4-PBA or T0 administration, the number of CD68+p-eIIF2α+ and CD68+CHOP+ double-positive cells in neointimal was also apparently decreased. Taken together, these results defined an unexpected role of IFN-γ and LXR-α in the development of neointimal hyperplasia. The PIAS1/STAT1-dependent LXR-α degradation induced by IFN-γ promoted ER stress and apoptosis in macrophages, which leads to aggravated neointimal hyperplasia. LXR agonist efficiently improved neointimal hyperplasia, which may be a promising new strategy to ameliorate restenosis and vascular remodeling after PCI.-Zhao, Q., Zhou, D., You, H., Lou, B., Zhang, Y., Tian, Y., Guo, N., Chen, X., Liu, Y., Wu, Y., Yuan, Z., Zhou, J. IFN-γ aggravates neointimal hyperplasia by inducing endoplasmic reticulum stress and apoptosis in macrophages by promoting ubiquitin-dependent liver X receptor-α degradation.
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Affiliation(s)
- Qiang Zhao
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China
| | - Dong Zhou
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China
| | - Hongjun You
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China
| | - Bowen Lou
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China
| | - Yan Zhang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China
| | - Yuling Tian
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China
| | - Ning Guo
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China
| | - Xiaoli Chen
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China
| | - Yan Liu
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China
| | - Yue Wu
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China
| | - Zuyi Yuan
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China; .,Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, China
| | - Juan Zhou
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, China; .,Key Laboratory of Molecular Cardiology of Shanxi Province, Xi'an, China
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32
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Abstract
The AMP-activated protein kinase (AMPK) is a central regulator of multiple metabolic pathways and may have therapeutic importance for treating obesity, insulin resistance, type 2 diabetes (T2D), non-alcoholic fatty liver disease (NAFLD), and cardiovascular disease (CVD). Given the ubiquitous expression of AMPK, it has been a challenge to evaluate which tissue types may be most beneficially poised for mediating the positive metabolic effects of AMPK-centered treatments. In this review we evaluate the metabolic phenotypes of transgenic mouse models in which AMPK expression and function have been manipulated, and the impact this has on controlling lipid metabolism, glucose homeostasis, and inflammation. This information may be useful for guiding the development of AMPK-targeted therapeutics to treat chronic metabolic diseases.
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Affiliation(s)
- Emily A Day
- Department of Medicine, McMaster University, 1280 Main Street West, Hamilton, ON, Canada
| | - Rebecca J Ford
- Department of Medicine, McMaster University, 1280 Main Street West, Hamilton, ON, Canada
| | - Gregory R Steinberg
- Department of Medicine, McMaster University, 1280 Main Street West, Hamilton, ON, Canada; Department of Biochemistry and Biomedical Sciences, McMaster University, 1280 Main Street West, Hamilton, ON, Canada.
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Abstract
The AMP-activated protein kinase (AMPK) is a key regulator of cellular and whole-body energy homeostasis, which acts to restore energy homoeostasis whenever cellular energy charge is depleted. Over the last 2 decades, it has become apparent that AMPK regulates several other cellular functions and has specific roles in cardiovascular tissues, acting to regulate cardiac metabolism and contractile function, as well as promoting anticontractile, anti-inflammatory, and antiatherogenic actions in blood vessels. In this review, we discuss the role of AMPK in the cardiovascular system, including the molecular basis of mutations in AMPK that alter cardiac physiology and the proposed mechanisms by which AMPK regulates vascular function under physiological and pathophysiological conditions.
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Affiliation(s)
- Ian P Salt
- From the Institute of Cardiovascular & Medical Sciences, College of Medical, Veterinary & Life Sciences, University of Glasgow, Scotland, United Kingdom (I.P.S.); and Division of Cell Signalling & Immunology, School of Life Sciences, University of Dundee, Scotland, United Kingdom (D.G.H.).
| | - D Grahame Hardie
- From the Institute of Cardiovascular & Medical Sciences, College of Medical, Veterinary & Life Sciences, University of Glasgow, Scotland, United Kingdom (I.P.S.); and Division of Cell Signalling & Immunology, School of Life Sciences, University of Dundee, Scotland, United Kingdom (D.G.H.)
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