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Su B, Ren Y, Yao W, Su Y, He Q. Mitochondrial dysfunction and NLRP3 inflammasome: key players in kidney stone formation. BJU Int 2024. [PMID: 38967108 DOI: 10.1111/bju.16454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
The mitochondrion serves as a critical intracellular organelle, engaging in essential roles in the regulation of energy production, oxidative stress management, calcium homeostasis, and apoptosis. One such disease that has been particularly associated with these functions is kidney stone disease (KSD), specifically calcium oxalate (CaOx). It is underpinned by oxidative stress and tissue inflammation. Recent studies have shed light on the vital involvement of mitochondrial dysfunction, the nucleotide-binding domain and leucine-rich repeat containing protein 3 (NLRP3) inflammasome, endoplasmic reticulum stress and subsequent cell death in CaOx crystal retention and aggregation. These processes are pivotal in the pathogenesis of kidney stone formation. This review focuses on the pivotal roles of mitochondria in renal cell functions and provides an overview of the intricate interconnectedness between mitochondrial dysfunction and NLRP3 inflammasome activation in the context of KSD. It is essential to recognise the utmost significance of gaining a comprehensive understanding of the mechanisms that safeguard mitochondrial function and regulate the NLRP3 inflammasome. Such knowledge carries significant scientific implications and opens up promising avenues for the development of innovative strategies to prevent the formation of kidney stones.
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Affiliation(s)
- Boyan Su
- Department of Urology, Key Laboratory of Disease of Urological Systems, Gansu Nepho-Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, Gansu, China
- The Second Clinical Medical College, Lanzhou University, Lanzhou, Gansu, China
| | - YaLin Ren
- Department of Urology, Key Laboratory of Disease of Urological Systems, Gansu Nepho-Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, Gansu, China
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Weimin Yao
- Department of Urology, Tongji Medical College Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yue Su
- The Second Clinical Medical College, Lanzhou University, Lanzhou, Gansu, China
| | - Qiqi He
- Department of Urology, Key Laboratory of Disease of Urological Systems, Gansu Nepho-Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou, Gansu, China
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2
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van der Ark-Vonk EM, Puijk MV, Pasterkamp G, van der Laan SW. The Effects of FABP4 on Cardiovascular Disease in the Aging Population. Curr Atheroscler Rep 2024; 26:163-175. [PMID: 38698167 PMCID: PMC11087245 DOI: 10.1007/s11883-024-01196-5] [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] [Accepted: 03/05/2024] [Indexed: 05/05/2024]
Abstract
PURPOSE OF REVIEW Fatty acid-binding protein 4 (FABP4) plays a role in lipid metabolism and cardiovascular health. In this paper, we cover FABP4 biology, its implications in atherosclerosis from observational studies, genetic factors affecting FABP4 serum levels, and ongoing drug development to target FABP4 and offer insights into future FABP4 research. RECENT FINDINGS FABP4 impacts cells through JAK2/STAT2 and c-kit pathways, increasing inflammatory and adhesion-related proteins. In addition, FABP4 induces angiogenesis and vascular smooth muscle cell proliferation and migration. FABP4 is established as a reliable predictive biomarker for cardiovascular disease in specific at-risk groups. Genetic studies robustly link PPARG and FABP4 variants to FABP4 serum levels. Considering the potential effects on atherosclerotic lesion development, drug discovery programs have been initiated in search for potent inhibitors of FABP4. Elevated FABP4 levels indicate an increased cardiovascular risk and is causally related to acceleration of atherosclerotic disease, However, clinical trials for FABP4 inhibition are lacking, possibly due to concerns about available compounds' side effects. Further research on FABP4 genetics and its putative causal role in cardiovascular disease is needed, particularly in aging subgroups.
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Affiliation(s)
- Ellen M van der Ark-Vonk
- Central Diagnostics Laboratory, Division Laboratory, Pharmacy, and Biomedical Genetics, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Mike V Puijk
- Central Diagnostics Laboratory, Division Laboratory, Pharmacy, and Biomedical Genetics, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Gerard Pasterkamp
- Central Diagnostics Laboratory, Division Laboratory, Pharmacy, and Biomedical Genetics, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Sander W van der Laan
- Central Diagnostics Laboratory, Division Laboratory, Pharmacy, and Biomedical Genetics, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands.
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3
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Zhang Y, Zhang B, Sun X. The molecular mechanism of macrophage-adipocyte crosstalk in maintaining energy homeostasis. Front Immunol 2024; 15:1378202. [PMID: 38650945 PMCID: PMC11033412 DOI: 10.3389/fimmu.2024.1378202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 03/25/2024] [Indexed: 04/25/2024] Open
Abstract
Interactions between macrophages and adipocytes in adipose tissue are critical for the regulation of energy metabolism and obesity. Macrophage polarization induced by cold or other stimulations can drive metabolic reprogramming of adipocytes, browning, and thermogenesis. Accordingly, investigating the roles of macrophages and adipocytes in the maintenance of energy homeostasis is critical for the development of novel therapeutic approaches specifically targeting macrophages in metabolic disorders such as obesity. Current review outlines macrophage polarization not only regulates the release of central nervous system and inflammatory factors, but controls mitochondrial function, and other factor that induce metabolic reprogramming of adipocytes and maintain energy homeostasis. We also emphasized on how the adipocytes conversely motivate the polarization of macrophage. Exploring the interactions between adipocytes and macrophages may provide new therapeutic strategies for the management of obesity-related metabolic diseases.
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Affiliation(s)
- Yudie Zhang
- Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Guizhou University of Traditional Chinese Medicine, Guiyang, China
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Beijing, China
- Key Laboratory of Efficacy Evaluation of Chinese Medicine Against Glyeolipid Metabolism Disorder Disease, State Administration of Traditional Chinese Medicine, Beijing, China
| | - Bin Zhang
- Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Beijing, China
- Key Laboratory of Efficacy Evaluation of Chinese Medicine Against Glyeolipid Metabolism Disorder Disease, State Administration of Traditional Chinese Medicine, Beijing, China
| | - Xiaobo Sun
- Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Guizhou University of Traditional Chinese Medicine, Guiyang, China
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Beijing, China
- Key Laboratory of Efficacy Evaluation of Chinese Medicine Against Glyeolipid Metabolism Disorder Disease, State Administration of Traditional Chinese Medicine, Beijing, China
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4
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Wei X, Tan Y, Huang J, Dong X, Feng W, Liu T, Yang Z, Yang G, Luo X. N1-methylnicotinamide impairs gestational glucose tolerance in mice. J Mol Endocrinol 2024; 72:e230126. [PMID: 38029302 PMCID: PMC10831565 DOI: 10.1530/jme-23-0126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 11/29/2023] [Indexed: 12/01/2023]
Abstract
N1-methylnicotinamide (MNAM), a product of methylation of nicotinamide through nicotinamide N-methyltransferase, displays antidiabetic effects in male rodents. This study aimed to evaluate the ameliorative potential of MNAM on glucose metabolism in a gestational diabetes mellitus (GDM) model. C57BL/6N mice were fed with a high-fat diet (HFD) for 6 weeks before pregnancy and throughout gestation to establish the GDM model. Pregnant mice were treated with 0.3% or 1% MNAM during gestation. MNAM supplementation in CHOW diet and HFD both impaired glucose tolerance at gestational day 14.5 without changes in insulin tolerance. However, MNAM supplementation reduced hepatic lipid accumulation as well as mass and inflammation in visceral adipose tissue. MNAM treatment decreased GLUT4 mRNA and protein expression in skeletal muscle, where NAD+ salvage synthesis and antioxidant defenses were dampened. The NAD+/sirtuin system was enhanced in liver, which subsequently boosted hepatic gluconeogenesis. GLUT1 protein was diminished in placenta by MNAM. In addition, weight of placenta, fetus weight, and litter size were not affected by MNAM treatment. The decreased GLUT4 in skeletal muscle, boosted hepatic gluconeogenesis and dampened GLUT1 in placenta jointly contribute to the impairment of glucose tolerance tests by MNAM. Our data provide evidence for the careful usage of MNAM in treatment of GDM.
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Affiliation(s)
- Xiaojing Wei
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi’an Jiaotong University, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Yutian Tan
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi’an Jiaotong University, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Jiaqi Huang
- Institute of Basic Medicine, School of Medicine, Tsinghua University, Beijing, China
| | - Ximing Dong
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi’an Jiaotong University, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Weijie Feng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi’an Jiaotong University, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Tanglin Liu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi’an Jiaotong University, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Zhao Yang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Guiying Yang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Xiao Luo
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi’an Jiaotong University, Xi’an, China
- Institute of Neuroscience, Translational Medicine Institute, Xi’an Jiaotong University Health Science Center, Xi’an, China
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Zhang C, Lin Y, Li H, Hu H, Chen Y, Huang Y, Huang Z, Fang X, Zhang W, Lin Y. Fatty acid binding protein 4 (FABP4) induces chondrocyte degeneration via activation of the NF-κb signaling pathway. FASEB J 2024; 38:e23347. [PMID: 38095503 DOI: 10.1096/fj.202301882r] [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: 09/14/2023] [Revised: 10/28/2023] [Accepted: 11/20/2023] [Indexed: 12/18/2023]
Abstract
The pathogenesis of osteoarthritis (OA) is still unclear. Fatty acid binding protein 4 (FABP4), a novel adipokine, has been found to play a role in OA. This study aimed to explore the role of NF-κB in FABP4-induced OA. In the in vivo study, four pairs of 12-week-old male FABP4 knockout (KO) and wild-type (WT) mice were included. The activation of NF-κB was assessed. In parallel, 24 6-week-old male C57/Bl6 mice were fed a high-fat diet (HFD) and randomly allocated to four groups: daily oral gavage with (1) PBS solution; (2) QNZ (NF-κB-specific inhibitor, 1 mg/kg/d); (3) BMS309403 (FABP4-specific inhibitor, 30 mg/kg/d); and (4) BMS309403 (30 mg/kg/d) + QNZ (1 mg/kg/d). The diet and treatment were sustained for 4 months. The knee joints were obtained to assess cartilage degradation, NF-κB activation, and subchondral bone sclerosis. In the in vitro study, a mouse chondrogenic cell line (ATDC5) was cultured. FABP4 was supplemented to stimulate chondrocytes, and the activation of NF-κB was investigated. In parallel, QNZ and NF-κB-specific siRNA were used to inhibit NF-κB. In vivo, the FABP4 WT mice had more significant NF-κB activation than the KO mice. Dual inhibition of FABP4 and NF-κB alleviated knee OA in mice. FABP4 has no significant effect on the activation of the JNK signaling pathway. In vitro, FABP4 directly activated NF-κB in chondrocytes. The use of QNZ and NF-κB-siRNA significantly alleviated the expression of catabolic markers of chondrocytes induced by FABP4. FABP4 induces chondrocyte degeneration by activating the NF-κB pathway.
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Affiliation(s)
- Chaofan Zhang
- Department of Orthopaedic Surgery, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Orthopaedic Surgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Institute of Orthopedics, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Yiming Lin
- Department of Orthopaedic Surgery, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Orthopaedic Surgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Institute of Orthopedics, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Hongyan Li
- Department of Orthopaedic Surgery, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Orthopaedic Surgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Institute of Orthopedics, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Hongxin Hu
- Department of Orthopaedic Surgery, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Orthopaedic Surgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Institute of Orthopedics, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Orthopedic Surgery, Affiliated Hospital of Putian University, Putian, China
| | - Yongfa Chen
- Department of Orthopaedic Surgery, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Orthopaedic Surgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Institute of Orthopedics, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Pediatric Orthopaedic Surgery, the First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Ying Huang
- Department of Orthopaedic Surgery, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Orthopaedic Surgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Institute of Orthopedics, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Zida Huang
- Department of Orthopaedic Surgery, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Orthopaedic Surgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Institute of Orthopedics, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Xinyu Fang
- Department of Orthopaedic Surgery, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Orthopaedic Surgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Institute of Orthopedics, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Wenming Zhang
- Department of Orthopaedic Surgery, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Orthopaedic Surgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Fujian Provincial Institute of Orthopedics, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Yunzhi Lin
- Department of Stomatology, the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Department of Stomatology, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
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Xu CQ, Li J, Liang ZQ, Zhong YL, Zhang ZH, Hu XQ, Cao YB, Chen J. Sirtuins in macrophage immune metabolism: A novel target for cardiovascular disorders. Int J Biol Macromol 2024; 256:128270. [PMID: 38000586 DOI: 10.1016/j.ijbiomac.2023.128270] [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: 08/21/2023] [Revised: 10/17/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
Sirtuins (SIRT1-SIRT7), as a family of NAD+-dependent protein modifying enzymes, have various catalytic functions, such as deacetylases, dealkalylases, and deribonucleases. The Sirtuins family is directly or indirectly involved in pathophysiological processes such as glucolipid metabolism, oxidative stress, DNA repair and inflammatory response through various pathways and assumes an important role in several cardiovascular diseases such as atherosclerosis, myocardial infarction, hypertension and heart failure. A growing number of studies supports that metabolic and bioenergetic reprogramming directs the sequential process of inflammation. Failure of homeostatic restoration leads to many inflammatory diseases, and that macrophages are the central cells involving the inflammatory response and are the main source of inflammatory cytokines. Regulation of cellular metabolism has emerged as a fundamental process controlling macrophage function, but its exact signaling mechanisms remain to be revealed. Understanding the precise molecular basis of metabolic control of macrophage inflammatory processes may provide new approaches for targeting immune metabolism and inflammation. Here, we provide an update of studies in cardiovascular disease on the function and role of sirtuins in macrophage inflammation and metabolism, as well as drug candidates that may interfere with sirtuins, pointing to future prospects in this field.
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Affiliation(s)
- Chen-Qin Xu
- Institute of Vascular Anomalies, Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200082, China
| | - Ji Li
- Department of Vascular Disease, Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200082, China
| | - Zhi-Qiang Liang
- Department of Vascular Disease, Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200082, China
| | - Yi-Lang Zhong
- Institute of Vascular Anomalies, Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200082, China
| | - Zhi-Hui Zhang
- Institute of Vascular Anomalies, Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200082, China
| | - Xue-Qing Hu
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China; Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, United States of America
| | - Yong-Bing Cao
- Institute of Vascular Anomalies, Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200082, China.
| | - Jian Chen
- Institute of Vascular Anomalies, Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200082, China.
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7
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Atia AF, Abou-Hussien NM, Sweed DM, Sweed E, Abo-Khalil NA. Auranofin attenuates Schistosoma mansoni egg-induced liver granuloma and fibrosis in mice. J Helminthol 2023; 97:e95. [PMID: 38053397 DOI: 10.1017/s0022149x23000792] [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] [Indexed: 12/07/2023]
Abstract
Schistosomiasis is a serious tropical disease. Despite extensive research into the etiology of liver fibrosis, effective therapeutic options remain limited. This study aims to assess the effectiveness of auranofin in treating hepatic granuloma and fibrogenesis produced by Schistosoma (S.) mansoni eggs. Auranofin is a gold complex that contains thioglucose tetraacetate and triethylphosphine. Eighty BALB/c male mice were divided into four groups (n=20/group): negative control (GI), positive control (GII), and early (GIII) and late (GIV) treatment groups with oral auranofin according to beginning of treatment 4th week and 6th week post-infection. Mice were infected subcutaneously in a dose of 60±10 cercariae/mouse. Worm counts, egg loads, and oogram patterns were determined. Biochemical, histological, and immunostaining of interleukin-1β (IL-1β), Sirtuin 3 (SIRT3), and smooth muscle actin (SMA) were assessed. GIII showed a significant decrease in the total S. mansoni worm burden and ova/gram in liver tissue (with reduction percent of 63.07% and 78.26%, respectively). Schistosomal oogram patterns, immature and mature ova, also showed a significant decrease. The reduction in granuloma number and size was 40.63% and 48.66%, respectively, in GIII, whereas in GIV, the reduction percent was 76.63% and 67.08%. In addition, the degree of fibrosis was significantly diminished in both treated groups. GIV showed significant reduction in IL-1β and SMA expression and increase in SIRT3 expression. These findings reveal how auranofin suppresses the development of liver fibrosis. Therefore, it is crucial to take another look at auranofin as a prospective medication for the treatment of S. mansoni egg-induced hepatic granuloma and consequent fibrosis.
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Affiliation(s)
- A F Atia
- Medical Parasitology Department, Faculty of Medicine, Menoufia University, Shebin El-Kom, Menoufia, Egypt
| | - N M Abou-Hussien
- Medical Parasitology Department, Faculty of Medicine, Menoufia University, Shebin El-Kom, Menoufia, Egypt
| | - D M Sweed
- Pathology Department, National Liver Institute, Menoufia University, Shebin El-Kom, Menoufia, Egypt
| | - E Sweed
- Clinical Pharmacology Department, Faculty of Medicine, Menoufia University, Shebin El-Kom, Menoufia, Egypt
| | - N A Abo-Khalil
- Medical Parasitology Department, Faculty of Medicine, Menoufia University, Shebin El-Kom, Menoufia, Egypt
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Putri M, Rastiarsa BM, Djajanagara RATM, Ramli GA, Anggraeni N, Sutadipura N, Atik N, Syamsunarno MRAA. Effect of cogon grass root ethanol extract on fatty acid binding protein 4 and oxidative stress markers in a sepsis mouse model. F1000Res 2023; 10:1161. [PMID: 38559341 PMCID: PMC10980860 DOI: 10.12688/f1000research.73561.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/29/2023] [Indexed: 04/04/2024] Open
Abstract
Background: Sepsis causes several immunological and metabolic alterations that induce oxidative stress. The modulation of fatty acid-binding protein 4 (FABP4) has been shown to worsen this condition. Extract of cogon grass root (ECGR) contains flavonoids and isoeugenol compounds that exhibit anti-inflammatory and antioxidant properties. This study aimed to assess the effects of ECGR on FABP4 and oxidative stress-related factors in a sepsis mouse model. Methods: Twenty-nine male mice ( Mus musculus) of the Deutsche Denken Yoken strain were divided into four groups: group 1, control; group 2, mice treated with 10 μL/kg body weight (BW) lipopolysaccharide (LPS); and groups 3 and 4, mice pre-treated with 90 and 115 mg/kg BW, respectively, and then treated with 10 μL/kg BW LPS for 14 d. Blood, liver, lymph, and cardiac tissue samples were collected and subjected to histological and complete blood examinations. Antioxidant (Glutathione peroxidase 3 (GPx3) and superoxide dismutase), FABP4 levels, and immune system-associated biomarker levels (TNF-α, IL-6 and IL-1β) were measured. Results: Significant increases in platelet levels (p = 0.03), cardiomyocyte counts (p =0.004), and hepatocyte counts (p = 0.0004) were observed in group 4 compared with those in group 2. Conversely, compared with those in group 2, there were significant decreases in TNF-α expression in group 3 (p = 0.004), white pulp length and width in group 4 (p = 0.001), FABP4 levels in groups 3 and 4 (p = 0.015 and p = 0.012, respectively), lymphocyte counts in group 4 (p = 0.009), and monocyte counts (p = 0.000) and polymorphonuclear cell counts in the livers (p = 0.000) and hearts (p = 0.000) of groups 3 and 4. Gpx3 activity was significantly higher in group 3 than in group 1 (p = 0.04). Conclusions: ECGR reduces FABP4 level and modulating oxidative stress markers in sepsis mouse model.
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Affiliation(s)
- Mirasari Putri
- Department of Biochemistry, Nutrition and Biomolecular, Faculty of medicine. Universitas Islam Bandung, Bandung, West-Java, 40616, Indonesia
| | | | | | - Ghaliby Ardhia Ramli
- Faculty of Medicine, Universitas Islam Bandung, Bandung, West-Java, 40616, Indonesia
| | - Neni Anggraeni
- Medical Laboratorium Technologist, Bakti Asih School of Analyst, Bandung, West-Java, 40192, Indonesia
| | - Nugraha Sutadipura
- Department of Biochemistry, Nutrition and Biomolecular, Faculty of medicine. Universitas Islam Bandung, Bandung, West-Java, 40616, Indonesia
| | - Nur Atik
- Department of Biomedicine Sciences, Faculty of Medicine, Universitas Padjadjaran, West Java, 45363, Indonesia
| | - Mas Rizky A. A. Syamsunarno
- Department of Biomedicine Sciences, Faculty of Medicine, Universitas Padjadjaran, West Java, 45363, Indonesia
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Abstract
Fatty acid-binding proteins (FABPs) are small lipid-binding proteins abundantly expressed in tissues that are highly active in fatty acid (FA) metabolism. Ten mammalian FABPs have been identified, with tissue-specific expression patterns and highly conserved tertiary structures. FABPs were initially studied as intracellular FA transport proteins. Further investigation has demonstrated their participation in lipid metabolism, both directly and via regulation of gene expression, and in signaling within their cells of expression. There is also evidence that they may be secreted and have functional impact via the circulation. It has also been shown that the FABP ligand binding repertoire extends beyond long-chain FAs and that their functional properties also involve participation in systemic metabolism. This article reviews the present understanding of FABP functions and their apparent roles in disease, particularly metabolic and inflammation-related disorders and cancers.
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Affiliation(s)
- Judith Storch
- Department of Nutritional Sciences and Rutgers Center for Lipid Research, Rutgers University, New Brunswick, New Jersey, United States;
| | - Betina Corsico
- Instituto de Investigaciones Bioquímicas de La Plata, CONICET-UNLP, Facultad de Ciencias Médicas, La Plata, Argentina;
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10
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Shi Y, Wang CC, Wu L, Zhang Y, Xu A, Wang Y. Pathophysiological Insight into Fatty Acid-Binding Protein-4: Multifaced Roles in Reproduction, Pregnancy, and Offspring Health. Int J Mol Sci 2023; 24:12655. [PMID: 37628833 PMCID: PMC10454382 DOI: 10.3390/ijms241612655] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/04/2023] [Accepted: 08/06/2023] [Indexed: 08/27/2023] Open
Abstract
Fatty acid-binding protein-4 (FABP4), commonly known as adipocyte-fatty acid-binding protein (A-FABP), is a pleiotropic adipokine that broadly affects immunity and metabolism. It has been increasingly recognized that FABP4 dysfunction is associated with various metabolic syndromes, including obesity, diabetes, cardiovascular diseases, and metabolic inflammation. However, its explicit roles within the context of women's reproduction and pregnancy remain to be investigated. In this review, we collate recent studies probing the influence of FABP4 on female reproduction, pregnancy, and even fetal health. Elevated circulating FABP4 levels have been found to correlate with impaired reproductive function in women, such as polycystic ovary syndrome and endometriosis. Throughout pregnancy, FABP4 affects maternal-fetal interface homeostasis by affecting both glycolipid metabolism and immune tolerance, leading to adverse pregnancy outcomes, including miscarriage, gestational obesity, gestational diabetes, and preeclampsia. Moreover, maternal FABP4 levels exhibit a substantial linkage with the metabolic health of offspring. Herein, we discuss the emerging significance and potential application of FABP4 in reproduction and pregnancy health and delve into its underlying mechanism at molecular levels.
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Affiliation(s)
- Yue Shi
- The Second Clinical Medical School, Beijing University of Chinese Medicine, Beijing 100078, China; (Y.S.); (Y.Z.)
| | - Chi-Chiu Wang
- Department of Obstetrics and Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong;
- Li Ka Shing Institute of Health Sciences, School of Biomedical Sciences, Chinese University of Hong Kong-Sichuan University Joint Laboratory in Reproductive Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Liqun Wu
- Department of Pediatrics, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China;
| | - Yunqing Zhang
- The Second Clinical Medical School, Beijing University of Chinese Medicine, Beijing 100078, China; (Y.S.); (Y.Z.)
| | - Aimin Xu
- State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong;
- Department of Medicine, The University of Hong Kong, Hong Kong
| | - Yao Wang
- Department of Obstetrics and Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong;
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11
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Liu H, Huang Y, Zhao Y, Kang GJ, Feng F, Wang X, Liu M, Shi G, Revelo X, Bernlohr D, Dudley SC. Inflammatory Macrophage Interleukin-1β Mediates High-Fat Diet-Induced Heart Failure With Preserved Ejection Fraction. JACC Basic Transl Sci 2023; 8:174-185. [PMID: 36908663 PMCID: PMC9998610 DOI: 10.1016/j.jacbts.2022.08.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 08/02/2022] [Accepted: 08/02/2022] [Indexed: 12/02/2022]
Abstract
Diabetes mellitus (DM) is a main risk factor for diastolic dysfunction (DD) and heart failure with preserved ejection fraction. High-fat diet (HFD) mice presented with diabetes mellitus, DD, higher cardiac interleukin (IL)-1β levels, and proinflammatory cardiac macrophage accumulation. DD was significantly ameliorated by suppressing IL-1β signaling or depleting macrophages. Mice with macrophages unable to adopt a proinflammatory phenotype were low in cardiac IL-1β levels and were resistant to HFD-induced DD. IL-1β enhanced mitochondrial reactive oxygen species (mitoROS) in cardiomyocytes, and scavenging mitoROS improved HFD-induced DD. In conclusion, macrophage-mediated inflammation contributed to HFD-associated DD through IL-1β and mitoROS production.
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Key Words
- CCR2, C-C motif chemokine receptor 2
- CM, cardiomyocyte
- DD, diastolic dysfunction
- DM, diabetes mellitus
- EF, ejection fraction
- FABP4, fatty acid binding protein 4
- HF, heart failure
- HFD, high-fat diet
- HFpEF
- HFpEF, heart failure with preserved ejection fraction
- IL, interleukin
- IL-1β
- IL1RA, interleukin 1 receptor antagonist
- KO, knockout
- MCP, monocyte chemoattractant protein
- MyBP-C, myosin binding protein C
- TGF, transforming growth factor
- TNF, tumor necrosis factor
- Timd4, T cell immunoglobulin and mucin domain containing 4
- WT, wild-type
- diabetes
- diastolic dysfunction
- inflammation
- macrophage
- mitoROS, mitochondrial reactive oxygen species
- mitochondria
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Affiliation(s)
- Hong Liu
- Division of Cardiology, Department of Medicine, the Lillehei Heart Institute, University of Minnesota, Minneapolis, Minnesota, USA
| | - Yimao Huang
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota, USA
| | - Yang Zhao
- Division of Cardiology, Lanzhou University Second Hospital, Lanzhou University, Lanzhou, Gansu, China
| | - Gyeoung-Jin Kang
- Division of Cardiology, Department of Medicine, the Lillehei Heart Institute, University of Minnesota, Minneapolis, Minnesota, USA
| | - Feng Feng
- Division of Cardiology, Department of Medicine, the Lillehei Heart Institute, University of Minnesota, Minneapolis, Minnesota, USA
| | - Xiaodan Wang
- Division of Cardiology, Department of Medicine, the Lillehei Heart Institute, University of Minnesota, Minneapolis, Minnesota, USA
| | - Man Liu
- Division of Cardiology, Department of Medicine, the Lillehei Heart Institute, University of Minnesota, Minneapolis, Minnesota, USA
| | - Guangbin Shi
- Division of Cardiology, Cardiovascular Research Center, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Xavier Revelo
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, Minnesota, USA
| | - David Bernlohr
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota, USA
| | - Samuel C. Dudley
- Division of Cardiology, Department of Medicine, the Lillehei Heart Institute, University of Minnesota, Minneapolis, Minnesota, USA
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12
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Senn L, Costa AM, Avallone R, Socała K, Wlaź P, Biagini G. Is the peroxisome proliferator-activated receptor gamma a putative target for epilepsy treatment? Current evidence and future perspectives. Pharmacol Ther 2023; 241:108316. [PMID: 36436690 DOI: 10.1016/j.pharmthera.2022.108316] [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: 09/14/2022] [Revised: 11/20/2022] [Accepted: 11/21/2022] [Indexed: 11/25/2022]
Abstract
The peroxisome proliferator-activated receptor gamma (PPARγ), which belongs to the family of nuclear receptors, has been mainly studied as an important factor in metabolic disorders. However, in recent years the potential role of PPARγ in different neurological diseases has been increasingly investigated. Especially, in the search of therapeutic targets for patients with epilepsy the question of the involvement of PPARγ in seizure control has been raised. Epilepsy is a chronic neurological disorder causing a major impact on the psychological, social, and economic conditions of patients and their families, besides the problems of the disease itself. Considering that the world prevalence of epilepsy ranges between 0.5% - 1.0%, this condition is the fourth for importance among the other neurological disorders, following migraine, stroke, and dementia. Among others, temporal lobe epilepsy (TLE) is the most common form of epilepsy in adult patients. About 65% of individuals who receive antiseizure medications (ASMs) experience seizure independence. For those in whom seizures still recur, investigating PPARγ could lead to the development of novel ASMs. This review focuses on the most important findings from recent investigations about the potential intracellular PPARγ-dependent processes behind different compounds that exhibited anti-seizure effects. Additionally, recent clinical investigations are discussed along with the promising results found for PPARγ agonists and the ketogenic diet (KD) in various rodent models of epilepsy.
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Affiliation(s)
- Lara Senn
- Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy; PhD School of Clinical and Experimental Medicine (CEM), University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Anna-Maria Costa
- Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Rossella Avallone
- Department of Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Katarzyna Socała
- Department of Animal Physiology and Pharmacology, Institute of Biological Sciences, Maria Curie-Skłodowska University, PL 20-033 Lublin, Poland
| | - Piotr Wlaź
- Department of Animal Physiology and Pharmacology, Institute of Biological Sciences, Maria Curie-Skłodowska University, PL 20-033 Lublin, Poland
| | - Giuseppe Biagini
- Department of Biomedical, Metabolic, and Neural Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy.
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13
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Wan Z, Fu S, Wang Z, Xu Y, Zhou Y, Lin X, Lan R, Han X, Luo Z, Miao J. FABP4-mediated lipid droplet formation in Streptococcus uberis-infected macrophages supports host defence. Vet Res 2022; 53:90. [PMID: 36371263 PMCID: PMC9652580 DOI: 10.1186/s13567-022-01114-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 09/16/2022] [Indexed: 11/15/2022] Open
Abstract
Foamy macrophages containing prominent cytoplasmic lipid droplets (LDs) are found in a variety of infectious diseases. However, their role in Streptococcus uberis-induced mastitis is unknown. Herein, we report that S. uberis infection enhances the fatty acid synthesis pathway in macrophages, resulting in a sharp increase in LD levels, accompanied by a significantly enhanced inflammatory response. This process is mediated by the involvement of fatty acid binding protein 4 (FABP4), a subtype of the fatty acid-binding protein family that plays critical roles in metabolism and inflammation. In addition, FABP4 siRNA inhibitor cell models showed that the deposition of LDs decreased, and the mRNA expression of Tnf, Il1b and Il6 was significantly downregulated after gene silencing. As a result, the bacterial load in macrophages increased. Taken together, these data demonstrate that macrophage LD formation is a host-driven component of the immune response to S. uberis. FABP4 contributes to promoting inflammation via LDs, which should be considered a new target for drug development to treat infections.
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14
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Gong H, Liu J, Xue Z, Wang W, Li C, Xu F, Du Y, Lyu X. SIRT3
attenuates coronary atherosclerosis in diabetic patients by regulating endothelial cell function. J Clin Lab Anal 2022; 36:e24586. [PMID: 35791925 PMCID: PMC9396194 DOI: 10.1002/jcla.24586] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 06/08/2022] [Accepted: 06/11/2022] [Indexed: 11/08/2022] Open
Abstract
Background This study aimed to explore the relationship between the Sirtuin 3 (SIRT3) gene and endothelial cell dysfunction, contributing to the progression of coronary atherosclerosis driven by hyperglycemia. Methods We measured serum SIRT3 levels using enzyme‐linked immunosorbent assay in 95 patients with type 2 diabetes mellitus (T2DM) who underwent diagnostic coronary angiography. The patients were divided into two groups according to the presence (n = 45) or absence (n = 50) of coronary artery disease (CAD). Human aortic endothelial cells (HAECs) grown in vitro in a medium with various concentrations of glucose (5.5, 11, 16.5, 22, 27.5, 33, and 38.5 mM) for 24 h were assessed for protein expression of SIRT3, peroxisome proliferator‐activated receptor alpha (PPAR‐α), endothelial nitric oxide (NO) synthase (eNOS), and inducible NO synthase (iNOS) using Western blot analysis. HAECs were subjected to SIRT3 overexpression or inhibition through SIRT3 adenovirus and siRNA transfection. Results Serum SIRT3 levels were significantly lower in T2DM patients with CAD than in those without CAD (p = 0.048). The in vitro results showed that HG significantly increased SIRT3, PPAR‐α, and eNOS protein expression in a concentration‐dependent manner. Moreover, iNOS expression was decreased in HAECs in response to HG. Reduced PPAR‐α and eNOS levels and increased iNOS levels were observed in SIRT3 silenced HAECs cells. In contrast, SIRT3 overexpression significantly improved PPAR‐α and eNOS expression and suppressed iNOS expression. Conclusion SIRT3 was associated with the progression of atherosclerosis in T2DM patients through upregulation of PPAR‐α and eNOS and downregulation of iNOS, which are involved in endothelial dysfunction under hyperglycemic conditions.
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Affiliation(s)
- Huiping Gong
- Department of Emergency The Second Hospital of Shandong University Jinan China
| | - Jing Liu
- Department of Cardiology The Second Hospital of Shandong University Jinan China
| | - Zhiwei Xue
- Cheeloo College of Medicine Shandong University Jinan China
| | - Wenwen Wang
- Department of Emergency The Second Hospital of Shandong University Jinan China
| | - Cuicui Li
- Department of Emergency The Second Hospital of Shandong University Jinan China
| | - Fanfan Xu
- Department of Emergency The Second Hospital of Shandong University Jinan China
| | - Yimeng Du
- Department of Cardiology The Second Hospital of Shandong University Jinan China
| | - Xiaona Lyu
- Department of Pediatric Surgery Qilu Hospital of Shandong University Jinan China
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15
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Berberine remodels adipose tissue to attenuate metabolic disorders by activating sirtuin 3. Acta Pharmacol Sin 2022; 43:1285-1298. [PMID: 34417576 PMCID: PMC9061715 DOI: 10.1038/s41401-021-00736-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 06/29/2021] [Indexed: 12/19/2022] Open
Abstract
Adipose tissue remodelling is considered a critical pathophysiological hallmark of obesity and related metabolic diseases. Berberine (BBR), a natural isoquinoline alkaloid, has potent anti-hyperlipidaemic and anti-hyperglycaemic effects. This study aimed to explore the role of BBR in modulating adipose tissue remodelling and the underlying mechanisms. BBR protected high fat diet (HFD)-fed mice against adiposity, insulin resistance and hyperlipidemia. BBR alleviated adipose tissue inflammation and fibrosis by inhibiting macrophage infiltration, pro-inflammatory macrophage polarization and the abnormal deposition of extracellular matrix, and the effect was mediated by BBR directly binding and activating the deacetylase Sirtuin 3 (SIRT3) and suppressing the activation of the mitogen-activated protein kinases and nuclear factor-κB signalling pathways. Furthermore, BBR decreased microRNA-155-5p secretion by macrophages, which in turn ameliorated liver injury. Moreover, BBR mitigated inflammatory responses in both LPS-stimulated macrophages and TNF-α-treated adipocytes and suppressed macrophage migration towards adipocytes by activating SIRT3. Collectively, this study revealed that BBR improved adipose tissue remodelling, and subsequently inhibited the secretion of microRNA-155-5p by macrophages, which alleviated adiposity, insulin resistance and liver injury in obese mice. The modulation of adipose tissue remodelling by activating SIRT3 could contribute to the anti-hyperlipidemic and anti-hyperglycemic effects of BBR.
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16
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Lei CX, Xie YJ, Li SJ, Jiang P, Du JX, Tian JJ. Fabp4 contributes toward regulating inflammatory gene expression and oxidative stress in Ctenopharyngodon idella. Comp Biochem Physiol B Biochem Mol Biol 2022; 259:110715. [PMID: 34999220 DOI: 10.1016/j.cbpb.2022.110715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/20/2021] [Accepted: 01/04/2022] [Indexed: 12/12/2022]
Abstract
Fatty acid-binding protein (Fabp)-4 is a member of the FABP family. Mammalian fabp4 has been demonstrated to involve in inflammation and immunity, whereas the related data of fish fabp4 remain limited. Therefore, we further investigated the effects of fabp4 on immunity in Ctenopharyngodon idella. The fabp4 sequence spanned 405 bp was cloned first, sharing high identity to fabp4 from other fish and mammals. Fabp4 expression was the highest in the adipose tissue, followed by the heart, muscle, and liver. In vivo, lipopolysaccharide (LPS) triggered the expression of fabp4, toll-like receptor (tlr)-22, interleukin (il)-1β, and tumor necrosis factor (tnf)-α in the kidney and spleen. In vitro, exposing C. idella CIK cells to LPS decreased their viability, and the expression of fabp4 was also increased by LPS. However, BMS309403, an inhibitor of FABP4, mitigated these effects. Furthermore, treating the cells with LPS or fabp4 overexpression plasmids resulted in reactive oxygen species (ROS) generation and upregulation of inflammatory genes expression, including tlr22, type-I interferon (ifn-1), interferon regulatory factor (irf)-7, tnfα, il-1β, and interferon-β promoter stimulator 1. These effects were ameliorated by preincubation with BMS309403. Moreover, incubating the cells with glutathione reduced the production of ROS and the expression of inflammatory genes that were evoked by LPS and plasmid treatments. These results showed that fabp4 acts as a pro-inflammatory molecule via elevating ROS levels, providing a novel understanding of the molecular regulation of innate immunity in teleosts.
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Affiliation(s)
- Cai-Xia Lei
- Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, PR China; Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, PR China
| | - Yu-Jing Xie
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, PR China; College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, PR China
| | - Sheng-Jie Li
- Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, PR China; Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, PR China.
| | - Peng Jiang
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, PR China
| | - Jin-Xing Du
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, PR China
| | - Jing-Jing Tian
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, PR China
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17
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Licero J, Illan MS, Descorbeth M, Cordero K, Figueroa JD, De Leon M. Fatty acid-binding protein 4 (FABP4) inhibition promotes locomotor and autonomic recovery in rats following spinal cord injury. J Neurotrauma 2022; 39:1099-1112. [PMID: 35297679 PMCID: PMC9347423 DOI: 10.1089/neu.2021.0346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The inflammatory response associated with traumatic spinal cord injury (SCI) contributes to locomotor and sensory impairments. Pro-inflammatory (M1) macrophages/microglia (MφMG) are the major cellular players in this response as they promote chronic inflammation resulting in injury expansion and tissue damage. Fatty Acid-Binding Protein 4 (FABP4) promotes M1 MφMG differentiation; however, it is unknown if FABP4 also plays a role in the etiology of SCI. The present study investigates whether FABP4's gene expression influences functional recovery following SCI. Analysis of qPCR data shows a robust induction of FABP4 mRNA (>100 fold) in rats subjected to a T9-T10 contusion injury compared to control. Western blot experiments reveal significant upregulation of FABP4 protein at the injury epicenter, and immunofluorescence analysis identifies this upregulation occurs in CD11b+ MφMG. Furthermore, upregulation of FABP4 gene expression correlates with PPARγ downregulation, inactivation of Iκβα, and the activation of the NF-κB pathway. Analysis of locomotor recovery using the Basso-Beattie-Bresnahan's (BBB) locomotor scale and the CatWalk gait analysis system shows that injured rats treated with FABP4 inhibitor BMS309403 have significant improvements in locomotion compared to vehicle controls. Additionally, inhibitor-treated rats exhibit enhanced autonomic bladder reflex recovery. Immunofluorescence experiments also show the administration of the FABP4 inhibitor increases the number of CD163+ and Liver Arginase+ M2 MφMG within the epicenter and penumbra of the injured spinal cord 28 dpi. These findings show that FABP4 may significantly exacerbate locomotor and sensory impairments during SCI by modulating macrophage/microglial activity.
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Affiliation(s)
- Jenniffer Licero
- Loma Linda University, Center for Health Disparities and Molecular Medicine, 142 Mortensen Hall, 11085 Campus St, Loma Linda, California, United States, 92354;
| | - Miguel S Illan
- Loma Linda University, Center for Health Disparities and Molecular Medicine, 142 Mortensen Hall, 11085 Campus St, Loma Linda, California, United States, 92354;
| | - Magda Descorbeth
- Loma Linda University, Center for Health Disparities and Molecular Medicine, Loma Linda, California, United States;
| | - Kathia Cordero
- Loma Linda University, Center for Health Disparities and Molecular Medicine, Loma Linda, California, United States;
| | - Johnny D Figueroa
- Loma Linda University, Center for Health Disparities and Molecular Medicine, Loma Linda, California, United States;
| | - Marino De Leon
- Loma Linda University, Center for Health Disparities and Molecular Medicine, 142 Mortensen Hall, 11085 Campus St, Loma Linda, California, United States, 92354;
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18
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Xu L, Zhang H, Wang Y, Yang A, Dong X, Gu L, Liu D, Ding N, Jiang Y. FABP4 activates the JAK2/STAT2 pathway via Rap1a in the homocysteine-induced macrophage inflammatory response in ApoE -/- mice atherosclerosis. J Transl Med 2022; 102:25-37. [PMID: 34725437 PMCID: PMC8695379 DOI: 10.1038/s41374-021-00679-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 09/01/2021] [Accepted: 09/03/2021] [Indexed: 12/02/2022] Open
Abstract
Atherosclerosis is a chronic inflammatory vascular disease, and inflammation plays a critical role in its formation and progression. Elevated serum homocysteine (Hcy) is an independent risk factor for atherosclerosis. Previous studies have shown that fatty acid binding protein 4 (FABP4) plays an important role in macrophage inflammation and lipid metabolism in atherosclerosis induced by Hcy. However, the underlying molecular mechanism of FABP4 in Hcy-induced macrophage inflammation remains unknown. In this study, we found that FABP4 activated the Janus kinase 2/signal transducer and activator of transcription 2 (JAK2/STAT2) pathway in macrophage inflammation induced by Hcy. Of note, we further observed that ras-related protein Rap-1a (Rap1a) induced the Tyr416 phosphorylation and membrane translocation of non-receptor tyrosine kinase (c-Src) to activate the JAK2/STAT2 pathway. In addition, the suppressor of cytokine signaling 1 (SOCS1)-a transcriptional target of signal transducer and activator of transcription (STATs) inhibited the JAK2/STAT2 pathway and Rap1a expression via a negative feedback loop. In summary, these results demonstrated that FABP4 promotes c-Src phosphorylation and membrane translocation via Rap1a to activate the JAK2/STAT2 pathway, contributing to Hcy-accelerated macrophage inflammation in ApoE-/- mice.
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Affiliation(s)
- Lingbo Xu
- Department of Pathophysiology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, China
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Huiping Zhang
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
- Prenatal Diagnosis Center of Ningxia Medical University General Hospital, Yinchuan, 750004, China
| | - Yanhua Wang
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
- Department of Gynecology, General Hospital of Ningxia Medical University, Yinchuan, 750004, China
| | - Anning Yang
- Department of Pathophysiology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, China
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Xiaoyan Dong
- Department of Pathophysiology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, China
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Lingyu Gu
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Dayue Liu
- Department of Pathophysiology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, China
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Ning Ding
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China
| | - Yideng Jiang
- Department of Pathophysiology, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, 750004, China.
- National Health Commission Key Laboratory of Metabolic Cardiovascular Diseases Research, Ningxia Medical University, Yinchuan, 750004, China.
- Ningxia Key Laboratory of Vascular Injury and Repair Research, Ningxia Medical University, Yinchuan, 750004, China.
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19
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Ren Y, Zhao H, Yin C, Lan X, Wu L, Du X, Griffiths HR, Gao D. Adipokines, Hepatokines and Myokines: Focus on Their Role and Molecular Mechanisms in Adipose Tissue Inflammation. Front Endocrinol (Lausanne) 2022; 13:873699. [PMID: 35909571 PMCID: PMC9329830 DOI: 10.3389/fendo.2022.873699] [Citation(s) in RCA: 51] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 06/17/2022] [Indexed: 11/18/2022] Open
Abstract
Chronic low-grade inflammation in adipose tissue (AT) is a hallmark of obesity and contributes to various metabolic disorders, such as type 2 diabetes and cardiovascular diseases. Inflammation in ATs is characterized by macrophage infiltration and the activation of inflammatory pathways mediated by NF-κB, JNK, and NLRP3 inflammasomes. Adipokines, hepatokines and myokines - proteins secreted from AT, the liver and skeletal muscle play regulatory roles in AT inflammation via endocrine, paracrine, and autocrine pathways. For example, obesity is associated with elevated levels of pro-inflammatory adipokines (e.g., leptin, resistin, chemerin, progranulin, RBP4, WISP1, FABP4, PAI-1, Follistatin-like1, MCP-1, SPARC, SPARCL1, and SAA) and reduced levels of anti-inflammatory adipokines such as adiponectin, omentin, ZAG, SFRP5, CTRP3, vaspin, and IL-10. Moreover, some hepatokines (Fetuin A, DPP4, FGF21, GDF15, and MANF) and myokines (irisin, IL-6, and DEL-1) also play pro- or anti-inflammatory roles in AT inflammation. This review aims to provide an updated understanding of these organokines and their role in AT inflammation and related metabolic abnormalities. It serves to highlight the molecular mechanisms underlying the effects of these organokines and their clinical significance. Insights into the roles and mechanisms of these organokines could provide novel and potential therapeutic targets for obesity-induced inflammation.
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Affiliation(s)
- Yakun Ren
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
| | - Hao Zhao
- School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Chunyan Yin
- Department of Pediatrics, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Xi Lan
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Litao Wu
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Xiaojuan Du
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Helen R. Griffiths
- Swansea University Medical School, Swansea University, Swansea, United Kingdom
| | - Dan Gao
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Center, Xi’an, China
- *Correspondence: Dan Gao,
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20
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Wirth K, Shinoda S, Sato-Dahlman M, Dickey DM, Bernlohr DA, Ikramuddin S, Yamamoto M. Fatty acid binding protein 4 regulates pancreatic cancer cell proliferation via activation of nuclear factor E2-related factor 2. Surg Obes Relat Dis 2021; 18:485-493. [PMID: 34998697 DOI: 10.1016/j.soard.2021.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 11/18/2021] [Accepted: 12/01/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Obesity and diabetes are associated with an increased incidence of pancreatic cancer. Fatty acid binding protein 4 (FABP4), noted to be higher in patients with severe obesity, is linked to the development and progression of several cancers, and its level in the circulation decreases after bariatric surgery. OBJECTIVE In this paper, we evaluate the role of FABP4 in pancreatic cancer progression. SETTING University Hospital and Laboratories, United States. METHODS AND RESULTS When Panc-1 (human) and Pan02 (mouse) pancreatic cancer cells were treated with FABP4 or the-single-point mutant FABP4 (R126Q, fatty acid binding site mutant), only FABP4 stimulated cellular proliferation. The transcriptional activity of nuclear factor E2-related factor 2 (NRF2) was increased in response to FABP4 but not the R126Q. FABP4 treatment also led to downregulation of reactive oxygen species (ROS) activity. Consistent with induced cell propagation by FABP4, the growth of Pan02 tumor was decreased in FABP4-null animals compared with C57BL/6J controls. CONCLUSION These results suggest that FABP4 increases pancreatic cancer proliferation via activation of NRF2 and downregulation of ROS activity.
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Affiliation(s)
- Keith Wirth
- Department of Surgery, University of Minnesota, Minneapolis, Minnesota
| | - Shuhei Shinoda
- Department of Surgery, University of Minnesota, Minneapolis, Minnesota
| | - Mizuho Sato-Dahlman
- Department of Surgery, University of Minnesota, Minneapolis, Minnesota; Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota
| | - Deborah M Dickey
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, Minnesota
| | - David A Bernlohr
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, Minnesota
| | - Sayeed Ikramuddin
- Department of Surgery, University of Minnesota, Minneapolis, Minnesota; Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota
| | - Masato Yamamoto
- Department of Surgery, University of Minnesota, Minneapolis, Minnesota; Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota.
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21
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Zhou S, Wang X, Shi J, Han Q, He L, Tang W, Zhang A. Serum fatty acid binding protein 4 levels are associated with abdominal aortic calcification in peritoneal dialysis patients. Ren Fail 2021; 43:1539-1548. [PMID: 34789046 PMCID: PMC8604498 DOI: 10.1080/0886022x.2021.2003205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background Fatty acid binding protein 4 (FABP4) is an adipokine that was mainly derived from adipocytes and macrophages. Vascular calcification (VC) is highly prevalent in peritoneal dialysis (PD) patients and could predict their cardiovascular mortality. The pathogenesis of VC is complex, and adipokines may play an important role in it. This study aimed to examine the relationship between serum FABP4 and VC in PD patients. Methods Serum FABP4 was measured by enzyme-linked immunosorbent assay. According to the median value of serum FABP4, the participants were divided into the low FABP4 group and the high FABP4 group. Lateral plain X-ray films of abdomen were used to evaluate the abdominal aortic calcification (AAC) score. The participants were divided into the high AAC score group (AAC score ≥4, indicating moderate or heavy VC) and the low AAC score group (AAC score <4, indicating no or mild VC). Results 116 PD patients were involved in the study. The AAC score and the proportion of patients with an AAC score ≥4 of the high FABP4 group were significantly higher than those of the low FABP4 group. Serum FABP4 of the high AAC score group was significantly higher than that of the low AAC score group [164.5 (138.4, 362.8) ng/mL versus 144.7 (123.8, 170.1) ng/mL, p = 0.002]. Serum FABP4 was positively associated with the AAC score according to the multivariate linear regression analysis. In the multivariate logistic regression analysis, serum FABP4 was the independent influencer of an AAC score ≥4. Conclusions Serum FABP4 is positively associated with the AAC score and is an independent marker of AAC in PD patients.
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Affiliation(s)
- Sijia Zhou
- Department of Nephrology, Peking University Third Hospital, Beijing, China
| | - Xiaoxiao Wang
- Research Center of Clinical Epidemiology, Peking University Third Hospital, Beijing, China
| | - Junbao Shi
- Department of Nephrology, Peking University Third Hospital, Beijing, China
| | - Qingfeng Han
- Department of Nephrology, Peking University Third Hospital, Beijing, China
| | - Lian He
- Department of Nephrology, Peking University Third Hospital, Beijing, China
| | - Wen Tang
- Department of Nephrology, Peking University Third Hospital, Beijing, China
| | - Aihua Zhang
- Department of Nephrology, Xuanwu Hospital Capital Medical University, Beijing, China
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22
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Wolf SJ, Melvin WJ, Gallagher K. Macrophage-mediated inflammation in diabetic wound repair. Semin Cell Dev Biol 2021; 119:111-118. [PMID: 34183242 PMCID: PMC8985699 DOI: 10.1016/j.semcdb.2021.06.013] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 06/07/2021] [Accepted: 06/18/2021] [Indexed: 02/08/2023]
Abstract
Non-healing wounds in Type 2 Diabetes (T2D) patients represent the most common cause of amputation in the US, with an associated 5-year mortality of nearly 50%. Our lab has examined tissue from both T2D murine models and human wounds in order to explore mechanisms contributing to impaired wound healing. Current published data in the field point to macrophage function serving a pivotal role in orchestrating appropriate wound healing. Wound macrophages in mice and patients with T2D are characterized by a persistent inflammatory state; however, the mechanisms that control this persistent inflammatory state are unknown. Current literature demonstrates that gene regulation through histone modifications, DNA modifications, and microRNA can influence macrophage plasticity during wound healing. Further, accumulating studies reveal the importance of cells such as adipocytes, infiltrating immune cells (PMNs and T cells), and keratinocytes secrete factors that may help drive macrophage polarization. This review will examine the role of macrophages in the wound healing process, along with their function and interactions with other cells, and how it is perturbed in T2D. We also explore epigenetic factors that regulate macrophage polarization in wounds, while highlighting the emerging role of other cell types that may influence macrophage phenotype following tissue injury.
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Affiliation(s)
- Sonya J. Wolf
- Section of Vascular Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI, USA
| | - William J. Melvin
- Section of Vascular Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Katherine Gallagher
- Section of Vascular Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI, USA,Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI, USA,Correspondence to: Department of Surgery, University of Michigan, 1500 East Medical Center Drive, SPC 5867, Ann Arbor, MI 48109, USA. (K. Gallagher)
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23
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A-FABP in Metabolic Diseases and the Therapeutic Implications: An Update. Int J Mol Sci 2021; 22:ijms22179386. [PMID: 34502295 PMCID: PMC8456319 DOI: 10.3390/ijms22179386] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 08/27/2021] [Accepted: 08/27/2021] [Indexed: 12/11/2022] Open
Abstract
Adipocyte fatty acid-binding protein (A-FABP), which is also known as ap2 or FABP4, is a fatty acid chaperone that has been further defined as a fat-derived hormone. It regulates lipid homeostasis and is a key mediator of inflammation. Circulating levels of A-FABP are closely associated with metabolic syndrome and cardiometabolic diseases with imminent diagnostic and prognostic significance. Numerous animal studies have elucidated the potential underlying mechanisms involving A-FABP in these diseases. Recent studies demonstrated its physiological role in the regulation of adaptive thermogenesis and its pathological roles in ischemic stroke and liver fibrosis. Due to its implication in various diseases, A-FABP has become a promising target for the development of small molecule inhibitors and neutralizing antibodies for disease treatment. This review summarizes the clinical and animal findings of A-FABP in the pathogenesis of cardio-metabolic diseases in recent years. The underlying mechanism and its therapeutic implications are also highlighted.
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24
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Liao B, Geng L, Zhang F, Shu L, Wei L, Yeung PKK, Lam KSL, Chung SK, Chang J, Vanhoutte PM, Xu A, Wang K, Hoo RLC. Adipocyte fatty acid-binding protein exacerbates cerebral ischaemia injury by disrupting the blood-brain barrier. Eur Heart J 2021; 41:3169-3180. [PMID: 32350521 PMCID: PMC7556749 DOI: 10.1093/eurheartj/ehaa207] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 07/12/2019] [Accepted: 03/11/2020] [Indexed: 01/06/2023] Open
Abstract
Aims Adipocyte fatty acid-binding protein (A-FABP) is an adipokine implicating in various metabolic diseases. Elevated circulating levels of A-FABP correlate positively with poor prognosis in ischaemic stroke (IS) patients. No information is available concerning the role of A-FABP in the pathogenesis of IS. Experiments were designed to determine whether or not A-FABP mediates blood–brain barrier (BBB) disruption, and if so, to explore the molecular mechanisms underlying this deleterious effects. Methods and results Circulating A-FABP and its cerebral expression were increased in mice after middle cerebral artery occlusion. Genetic deletion and pharmacological inhibition of A-FABP alleviated cerebral ischaemia injury with reduced infarction volume, cerebral oedema, neurological deficits, and neuronal apoptosis; BBB disruption was attenuated and accompanied by reduced degradation of tight junction proteins and induction of matrix metalloproteinases-9 (MMP-9). In patients with acute IS, elevated circulating A-FABP levels positively correlated with those of MMP-9 and cerebral infarct volume. Mechanistically, ischaemia-induced elevation of A-FABP selectively in peripheral blood monocyte-derived macrophages and cerebral resident microglia promoted MMP-9 transactivation by potentiating JNK/c-Jun signalling, enhancing degradation of tight junction proteins and BBB leakage. The detrimental effects of A-FABP were prevented by pharmacological inhibition of MMP-9. Conclusion A-FABP is a key mediator of cerebral ischaemia injury promoting MMP-9-mediated BBB disruption. Inhibition of A-FABP is a potential strategy to improve IS outcome. ![]()
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Affiliation(s)
- Boya Liao
- State Key Laboratory of Pharmaceutical Biotechnology, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China.,Department of Pharmacology and Pharmacy, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Leiluo Geng
- State Key Laboratory of Pharmaceutical Biotechnology, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China.,Department of Medicine, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Fang Zhang
- Department of Radiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, No. 107, Yanjiang Road West, Guangzhou 510120, China
| | - Lingling Shu
- State Key Laboratory of Pharmaceutical Biotechnology, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China.,Department of Medicine, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Ling Wei
- Department of Neurology, the First Affiliated Hospital of Anhui Medical University, Anhui Province Key Laboratory on Cognition and Neuropsychiatric Disorders, No. 218, Jixi Road, Hefei, Anhui Province 230022, China
| | - Patrick K K Yeung
- Department of Anatomy, School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Karen S L Lam
- State Key Laboratory of Pharmaceutical Biotechnology, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China.,Department of Medicine, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Sookja K Chung
- Department of Anatomy, School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China.,Macau University of Science and Technology, Avenida Wai Long, Taipa 999078, Macau, China
| | - Junlei Chang
- Centre for Protein and Cell-based Drugs, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, No. 1068, Xueyuan Blvd, Xili Nanshan, Shenzhen 518055, China
| | - Paul M Vanhoutte
- State Key Laboratory of Pharmaceutical Biotechnology, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China.,Department of Pharmacology and Pharmacy, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China.,Department of Cardiovascular and Renal Research, Institute for Molecular Medicine, University of Southern Denmark, Campusvej 55, Odense 5230, Denmark
| | - Aimin Xu
- State Key Laboratory of Pharmaceutical Biotechnology, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China.,Department of Pharmacology and Pharmacy, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China.,Department of Medicine, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Kai Wang
- Department of Neurology, the First Affiliated Hospital of Anhui Medical University, Anhui Province Key Laboratory on Cognition and Neuropsychiatric Disorders, No. 218, Jixi Road, Hefei, Anhui Province 230022, China
| | - Ruby L C Hoo
- State Key Laboratory of Pharmaceutical Biotechnology, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China.,Department of Pharmacology and Pharmacy, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
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25
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Tuttolomondo A, Puleo MG, Velardo MC, Corpora F, Daidone M, Pinto A. Molecular Biology of Atherosclerotic Ischemic Strokes. Int J Mol Sci 2020; 21:ijms21249372. [PMID: 33317034 PMCID: PMC7763838 DOI: 10.3390/ijms21249372] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 12/03/2020] [Indexed: 02/07/2023] Open
Abstract
Among the causes of global death and disability, ischemic stroke (also known as cerebral ischemia) plays a pivotal role, by determining the highest number of worldwide mortality, behind cardiomyopathies, affecting 30 million people. The etiopathogenetic burden of a cerebrovascular accident could be brain ischemia (~80%) or intracranial hemorrhage (~20%). The most common site when ischemia occurs is the one is perfused by middle cerebral arteries. Worse prognosis and disablement consequent to brain damage occur in elderly patients or affected by neurological impairment, hypertension, dyslipidemia, and diabetes. Since, in the coming years, estimates predict an exponential increase of people who have diabetes, the disease mentioned above constitutes together with stroke a severe social and economic burden. In diabetic patients after an ischemic stroke, an exorbitant activation of inflammatory molecular pathways and ongoing inflammation is responsible for more severe brain injury and impairment, promoting the advancement of ischemic stroke and diabetes. Considering that the ominous prognosis of ischemic brain damage could by partially clarified by way of already known risk factors the auspice would be modifying poor outcome in the post-stroke phase detecting novel biomolecules associated with poor prognosis and targeting them for revolutionary therapeutic strategies.
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26
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Tackling Chronic Inflammation with Withanolide Phytochemicals-A Withaferin a Perspective. Antioxidants (Basel) 2020; 9:antiox9111107. [PMID: 33182809 PMCID: PMC7696210 DOI: 10.3390/antiox9111107] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/05/2020] [Accepted: 11/06/2020] [Indexed: 02/07/2023] Open
Abstract
Chronic inflammatory diseases are considered to be one of the biggest threats to human health. Most prescribed pharmaceutical drugs aiming to treat these diseases are characterized by side-effects and negatively affect therapy adherence. Finding alternative treatment strategies to tackle chronic inflammation has therefore been gaining interest over the last few decades. In this context, Withaferin A (WA), a natural bioactive compound isolated from Withania somnifera, has been identified as a promising anti-cancer and anti-inflammatory compound. Although the majority of studies focus on the molecular mechanisms of WA in cancer models, recent evidence demonstrates that WA also holds promise as a new phytotherapeutic agent against chronic inflammatory diseases. By targeting crucial inflammatory pathways, including nuclear factor kappa B (NF-κB) and nuclear factor erythroid 2 related factor 2 (Nrf2) signaling, WA suppresses the inflammatory disease state in several in vitro and preclinical in vivo models of diabetes, obesity, neurodegenerative disorders, cystic fibrosis and osteoarthritis. This review provides a concise overview of the molecular mechanisms by which WA orchestrates its anti-inflammatory effects to restore immune homeostasis.
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27
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Chen S, Du J, Zhao W, Cao R, Wang N, Li J, Shen B, Chen S. Elevated expression of FABP4 is associated with disease activity in rheumatoid arthritis patients. Biomark Med 2020; 14:1405-1413. [PMID: 33151094 DOI: 10.2217/bmm-2020-0284] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: Data from 124 rheumatoid arthritis (RA) patients and 69 healthy controls were collected. Materials & methods: ELISA was performed to detect serum FABP4 levels. Results: FABP4 level was elevated in RA patients and positively associated with 28-joint disease activity score, high-sensitivity C-reactive protein, erythrocyte sedimentation rate, total cholesterol, triglyceride and low-density lipoprotein cholesterol. Additionally, the area under the receiver operating characteristic curve for FABP4 was 0.685 for RA patients versus healthy controls (p = 0.001). RA patients were separated into low, moderate and high disease activity based on 28-joint disease activity score. The area under the receiver operating characteristic value was 0.877 for RA patients with high disease activity versus healthy controls (p < 0.001). Conclusion: FABP4 was associated with disease activity in RA patients.
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Affiliation(s)
- Shuaishuai Chen
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Linhai 317000, Zhejiang Province, China
| | - Juping Du
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Linhai 317000, Zhejiang Province, China
| | - Weibo Zhao
- Department of Orthopaedic Surgery, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Linhai 317000, Zhejiang Province, China
| | - Rong Cao
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Linhai 317000, Zhejiang Province, China
| | - Na Wang
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Linhai 317000, Zhejiang Province, China
| | - Jun Li
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Linhai 317000, Zhejiang Province, China
| | - Bo Shen
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Linhai 317000, Zhejiang Province, China
| | - Shiyong Chen
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Linhai 317000, Zhejiang Province, China
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28
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Dong X, Yang L. Inhibition of fatty acid binding protein 4 attenuates gestational diabetes mellitus. Prostaglandins Leukot Essent Fatty Acids 2020; 161:102179. [PMID: 32977290 DOI: 10.1016/j.plefa.2020.102179] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 08/13/2020] [Accepted: 09/09/2020] [Indexed: 02/06/2023]
Abstract
Accumulatig evidence demonstrated that inflammation is associated with the development of gestational diabetes mellitus (GDM). Fatty acid-binding protein 4 (FABP4) was reported to be involved in immune response. However, the effect of FABP4 in GDM remians unclear. This study focused on the effect of FABP4 in GDM. C57BL/KsJdb/+ (db/+) mice were used for GDM mouse model . BMS-309403 (BMS) was used to inhibit FABP4 levels in GDM mouse model. IL-6 and TNF-α concentrations in serum were determined via ELISA. Serum glucose and insulin concentrations were tested using commercial glucometer and mouse insulin ELISA kit, respectively. IL-6 and TNF-α mRNA and protein levels were detected using RT-PCR and western blot, respectively. FABP4 levels were upregulated in GDM group compared with control group and were positively associated with serum IL-6 and TNF-α levels. FABP4 inhibition by BMS significantly decreased body weight and serum glucose concentrations, increasd serum insulin concentration, suppressed IL-6 and TNF-α expression both in the serum and the pancreas, enhanced little size and inhibited birth weight in GDM mouse model. Inhibition of FABP4 attenuates GDM in genetic mice.
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Affiliation(s)
- Xiujuan Dong
- Department of Second Obstetrics, Cangzhou Central Hospital, No. 16 Xinhua West Road, Cangzhou 061000, Hebei, China.
| | - Long Yang
- Department of Brain Emergency, Cangzhou Central Hospital, No. 16 Xinhua West Road, Cangzhou 061000, Hebei, China
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29
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Zhang T, Fang Z, Linghu KG, Liu J, Gan L, Lin L. Small molecule-driven SIRT3-autophagy-mediated NLRP3 inflammasome inhibition ameliorates inflammatory crosstalk between macrophages and adipocytes. Br J Pharmacol 2020; 177:4645-4665. [PMID: 32726464 DOI: 10.1111/bph.15215] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 06/03/2020] [Accepted: 07/15/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND AND PURPOSE IL-1β produced by macrophages via the NOD-, LRR- and pyrin domain-containing 3 (NLRP3) inflammasome, mediates the inflammatory crosstalk between macrophages and adipocytes. In our previous study, (16S,20S,24R)-12β-acetoxy-16,23-epoxy-24,25-dihydroxy-3β-(β-D-xylopyranosyloxy)-9,19-cyclolanost-22(23)-ene (AEDC), a cycloartane triterpenoid isolated from Actaea vaginata (Ranunculaceae), was found to possess anti-inflammatory effect on LPS-treated RAW264.7 macrophages. This study was designed to investigate whether AEDC modulates macrophage-adipocyte crosstalk to alleviate adipose tissue inflammation. EXPERIMENTAL APPROACH The anti-inflammatory effect of AEDC was evaluated on LPS plus ATP-induced THP-1 macrophages and C57BL/6J mice. The expression of autophagy-related and NLRP3 inflammasome complex proteins was analysed by western blots, immunofluorescence staining and co-immunoprecipitation. The pro-inflammatory cytokines levels were determined by ELISA kits. The adipose tissue inflammation was evaluated by histological analysis and immunohistochemical staining. KEY RESULTS AEDC (5 and 10 μM) activated autophagy, which in turn suppressed the NLRP3 inflammasome activation and IL-1β secretion in THP-1 macrophages. AEDC increased the expression of SIRT3 deacetylase and enhanced its deacetylating activity to reverse mitochondrial dysfunction and activate AMP-activated protein kinase, which together induced autophagy. Moreover, AEDC (10 μM) attenuated macrophage conditioned medium-induced inflammatory responses in adipocytes and blocked THP-1 macrophages migration towards 3T3-L1 adipocytes. In inflammation mice, AEDC (5 and 20 mg·kg-1 ) treatment reduced the levels of pro-inflammatory cytokines in serum and epididymal adipose tissue and reduced macrophage infiltration to alleviate adipose tissue inflammation. CONCLUSION AND IMPLICATIONS AEDC attenuated the inflammatory crosstalk between macrophages and adipocytes through SIRT3-autophagy-mediated NLRP3 inflammasome inhibition, which might used for the treatment of adipose tissue inflammation-related metabolic disorders.
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Affiliation(s)
- Tian Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Macau, China
| | - Zhujun Fang
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Ke-Gang Linghu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Macau, China
| | - Jingxin Liu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Macau, China
| | - Lishe Gan
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China.,College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Ligen Lin
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Macau, China
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30
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Zhang J, Xiang H, Liu J, Chen Y, He RR, Liu B. Mitochondrial Sirtuin 3: New emerging biological function and therapeutic target. Theranostics 2020; 10:8315-8342. [PMID: 32724473 PMCID: PMC7381741 DOI: 10.7150/thno.45922] [Citation(s) in RCA: 224] [Impact Index Per Article: 56.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 06/08/2020] [Indexed: 02/05/2023] Open
Abstract
Sirtuin 3 (SIRT3) is one of the most prominent deacetylases that can regulate acetylation levels in mitochondria, which are essential for eukaryotic life and inextricably linked to the metabolism of multiple organs. Hitherto, SIRT3 has been substantiated to be involved in almost all aspects of mitochondrial metabolism and homeostasis, protecting mitochondria from a variety of damage. Accumulating evidence has recently documented that SIRT3 is associated with many types of human diseases, including age-related diseases, cancer, heart disease and metabolic diseases, indicating that SIRT3 can be a potential therapeutic target. Here we focus on summarizing the intricate mechanisms of SIRT3 in human diseases, and recent notable advances in the field of small-molecule activators or inhibitors targeting SIRT3 as well as their potential therapeutic applications for future drug discovery.
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31
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Sirt3 Protects Against Ischemic Stroke Injury by Regulating HIF-1α/VEGF Signaling and Blood-Brain Barrier Integrity. Cell Mol Neurobiol 2020; 41:1203-1215. [PMID: 32500353 DOI: 10.1007/s10571-020-00889-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Accepted: 05/26/2020] [Indexed: 12/11/2022]
Abstract
Sirtuin 3 (Sirt3) is a member of the Sirtuin family proteins and known to regulate multiple physiological processes such as metabolism and aging. As stroke is an aging-related disease, in this work, we attempt to examine the role and potential mechanism of Sirt3 in regulating ischemic stroke by using a permanent middle cerebral artery occlusion (pMCAO) model in wild type (WT) and Sirt3 knockout (KO) mice, coupled with oxygen glucose deprivation (OGD) experiments in cultured primary astrocytes. Sirt3 deficiency aggravated neuronal cell apoptosis and neurological deficits after brain ischemia. In addition, Sirt3 KO mice showed more severe blood-brain barrier (BBB) disruption and inflammatory responses compared with WT group in the acute phase. Furthermore, specific overexpression of Sirt3 in astrocytes by injecting glial fibrillary acidic protein (GFAP)::Sirt3 virus in ischemic region showed protective effect against stroke-induced damage. Mechanistically, Sirt3 could regulate vascular endothelial growth factor (VEGF) expression by inhibiting hypoxia inducible factor-1α (HIF-1α) signaling after ischemia (OGD). Our results have shown that Sirt3 plays a protective role in ischemic stroke via regulating HIF-1α/VEGF signaling in astrocytes, and reversal of the Sirt3 expression at the acute phase could be a worthy direction for stroke therapy.
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Li Y, Ma Q, Li P, Wang J, Wang M, Fan Y, Wang T, Wang C, Wang T, Zhao B. Proteomics reveals different pathological processes of adipose tissue, liver, and skeletal muscle under insulin resistance. J Cell Physiol 2020; 235:6441-6461. [PMID: 32115712 DOI: 10.1002/jcp.29658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 02/12/2020] [Indexed: 12/17/2022]
Abstract
Type 2 diabetes mellitus is the most common type of diabetes, and insulin resistance (IR) is its core pathological mechanism. Proteomics is an ingenious and promising Omics technology that can comprehensively describe the global protein expression profiling of body or specific tissue, and is widely applied to the study of molecular mechanisms of diseases. In this paper, we focused on insulin target organs: adipose tissue, liver, and skeletal muscle, and analyzed the different pathological processes of IR in these three tissues based on proteomics research. By literature studies, we proposed that the main pathological processes of IR among target organs were diverse, which showed unique characteristics and focuses. We further summarized the differential proteins in target organs which were verified to be related to IR, and discussed the proteins that may play key roles in the emphasized pathological processes, aiming at discovering potentially specific differential proteins of IR, and providing new ideas for pathological mechanism research of IR.
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Affiliation(s)
- Yaqi Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Quantao Ma
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Pengfei Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Jingkang Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Min Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Yuanyuan Fan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Tieshan Wang
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Chunguo Wang
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Ting Wang
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Baosheng Zhao
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
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Luo YG, Han B, Sun TW, Liu X, Liu J, Zhang J. The association between serum adipocyte fatty acid-binding protein and 3-month disability outcome after aneurysmal subarachnoid hemorrhage. J Neuroinflammation 2020; 17:66. [PMID: 32075656 PMCID: PMC7029438 DOI: 10.1186/s12974-020-01743-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 02/11/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Adipocyte fatty acid-binding protein (FABP4) is an adipokine that plays an important role in development of cardiovascular and metabolic diseases. The aim of this study was to assess the 3-month prognostic value of serum levels of FABP4 in Chinese patients with aneurysmal subarachnoid hemorrhage (aSAH) on hospital admission. METHODS This was a prospective observational study from a stroke treatment center in Zhengzhou, China. From October 2016 to May 2018, patients with aSAH who were hospitalized within 24 h were included. In addition, 202 age- and gender-matched healthy volunteers were assigned to the healthy control group. At admission, serum levels of FABP4 were measured, and patients' characteristics, Hunt-Hess grade, and modified Fisher grade evaluated. At 3-month follow-up, functional outcome (Glasgow Outcome Scale score; dichotomized as poor [score 1-3] or good [score 4-5]) and all-cause mortality were recorded. Univariate and multivariate logistic regression models were used to investigate the association of FABP4 with the two endpoints. RESULTS A total of 418 patients with aSAH were included in this study. The median age was 58 years (interquartile range, 49-66 years), and 57.9% were women. FABP4 serum levels were related to Hunt-Hess score (r[Spearman] = 0.381; P < 0.001). Patients with a poor outcome and non-survivors had significantly increased serum FABP4 levels on admission (P < 0.001 for all). In multivariate logistic regression analysis, FABP4 was an independent predictor of poor outcome and mortality, with increased risks of 7% (odds ratios 1.07, 95% confidence interval [CI] 1.02-1.13; P = 0.001) and 5% (odds ratio 1.05, 95% CI, 1.01-1.12; P = 0.003), respectively. Receiver operating characteristics to predict functional outcome and mortality were significantly different between conventional risk factors (difference area under the curve 0.024, 95% CI 0.018-0.032) and FABP4 plus conventional risk factors (area under the curve 0.015, 95%CI 0.011-0.020). After FABP4 was added to the existing risk factors, mortality was better reclassified and was associated with the net reclassification improvement statistic (P = 0.009), while poor outcome was better reclassified and associated with both the integrated discrimination improvement and net reclassification improvement statistics (P < 0.05 for all). CONCLUSIONS Elevated serum FABP4 levels were related to poor outcome and mortality in a cohort of patients with aSAH.
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Affiliation(s)
- Yong-Gang Luo
- Department of Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, Henan, China
| | - Bing Han
- Department of Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, Henan, China
| | - Tong-Wen Sun
- Department of Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, Henan, China
| | - Xianzhi Liu
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, Henan, China
| | - Jun Liu
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, Henan, China
| | - Jun Zhang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, No. 1, Jianshe East Road, Zhengzhou, 450000, Henan, China.
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Heinonen T, Ciarlo E, Rigoni E, Regina J, Le Roy D, Roger T. Dual Deletion of the Sirtuins SIRT2 and SIRT3 Impacts on Metabolism and Inflammatory Responses of Macrophages and Protects From Endotoxemia. Front Immunol 2019; 10:2713. [PMID: 31849939 PMCID: PMC6901967 DOI: 10.3389/fimmu.2019.02713] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 11/05/2019] [Indexed: 12/25/2022] Open
Abstract
Sirtuin 2 (SIRT2) and SIRT3 are cytoplasmic and mitochondrial NAD-dependent deacetylases. SIRT2 and SIRT3 target proteins involved in metabolic, proliferation and inflammation pathways and have been implicated in the pathogenesis of neurodegenerative, metabolic and oncologic disorders. Both pro- and anti-inflammatory effects have been attributed to SIRT2 and SIRT3, and single deficiency in SIRT2 or SIRT3 had minor or no impact on antimicrobial innate immune responses. Here, we generated a SIRT2/3 double deficient mouse line to study the interactions between SIRT2 and SIRT3. SIRT2/3−/− mice developed normally and showed subtle alterations of immune cell populations in the bone marrow, thymus, spleen, blood and peritoneal cavity that contained notably more anti-inflammatory B-1a cells and less NK cells. In vitro, SIRT2/3−/− macrophages favored fatty acid oxidation (FAO) over glycolysis and produced increased levels of both proinflammatory and anti-inflammatory cytokines. In line with metabolic adaptation and increased numbers of peritoneal B-1a cells, SIRT2/3−/− mice were robustly protected from endotoxemia. Yet, SIRT2/3 double deficiency did not modify endotoxin tolerance. Overall, these data suggest that sirtuins can act in concert or compensate each other for certain immune functions, a parameter to be considered for drug development. Moreover, inhibitors targeting multiple sirtuins developed for clinical purposes may be useful to treat inflammatory diseases.
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Affiliation(s)
- Tytti Heinonen
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Eleonora Ciarlo
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Ersilia Rigoni
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Jean Regina
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Didier Le Roy
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Thierry Roger
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
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Korbecki J, Bajdak-Rusinek K. The effect of palmitic acid on inflammatory response in macrophages: an overview of molecular mechanisms. Inflamm Res 2019; 68:915-932. [PMID: 31363792 PMCID: PMC6813288 DOI: 10.1007/s00011-019-01273-5] [Citation(s) in RCA: 258] [Impact Index Per Article: 51.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 07/22/2019] [Accepted: 07/23/2019] [Indexed: 02/06/2023] Open
Abstract
Palmitic acid is a saturated fatty acid whose blood concentration is elevated in obese patients. This causes inflammatory responses, where toll-like receptors (TLR), TLR2 and TLR4, play an important role. Nevertheless, palmitic acid is not only a TLR agonist. In the cell, this fatty acid is converted into phospholipids, diacylglycerol and ceramides. They trigger the activation of various signaling pathways that are common for LPS-mediated TLR4 activation. In particular, metabolic products of palmitic acid affect the activation of various PKCs, ER stress and cause an increase in ROS generation. Thanks to this, palmitic acid also strengthens the TLR4-induced signaling. In this review, we discuss the mechanisms of inflammatory response induced by palmitic acid. In particular, we focus on describing its effect on ER stress and IRE1α, and the mechanisms of NF-κB activation. We also present the mechanisms of inflammasome NLRP3 activation and the effect of palmitic acid on enhanced inflammatory response by increasing the expression of FABP4/aP2. Finally, we focus on the consequences of inflammatory responses, in particular, the effect of TNF-α, IL-1β and IL-6 on insulin resistance. Due to the high importance of macrophages and the production of proinflammatory cytokines by them, this work mainly focuses on these cells.
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Affiliation(s)
- Jan Korbecki
- Department of Molecular Biology, School of Medicine in Katowice, Medical University of Silesia, Medyków 18 St., 40-752, Katowice, Poland.
| | - Karolina Bajdak-Rusinek
- Department of Medical Genetics, School of Medicine in Katowice, Medical University of Silesia, Medyków 18 St., 40-752, Katowice, Poland
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SIRT3 Regulates Macrophage-Mediated Inflammation in Diabetic Wound Repair. J Invest Dermatol 2019; 139:2528-2537.e2. [PMID: 31207226 DOI: 10.1016/j.jid.2019.05.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 05/22/2019] [Accepted: 05/28/2019] [Indexed: 12/26/2022]
Abstract
Control of inflammation is critical for the treatment of nonhealing wounds, but a delicate balance exists between early inflammation that is essential for normal tissue repair and the pathologic inflammation that can occur later in the repair process. This necessitates the development of novel therapies that can target inflammation at the appropriate time during repair. Here, we found that SIRT3 is essential for normal healing and regulates inflammation in wound macrophages after injury. Under prediabetic conditions, SIRT3 was decreased in wound macrophages and resulted in dysregulated inflammation. In addition, we found that FABP4 regulates SIRT3 in human blood monocytes, and inhibition of FABP4 in wound macrophages decreases inflammatory cytokine expression, making FABP4 a viable target for the regulation of excess inflammation and wound repair in diabetes. Using a series of ex vivo and in vivo studies with genetically engineered mouse models and diabetic human monocytes, we showed that FABP4 expression is epigenetically upregulated in diabetic wound macrophages and, in turn, diminishes SIRT3 expression, thereby promoting inflammation. These findings have significant implications for controlling inflammation and promoting tissue repair in diabetic wounds.
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Jiang DQ, Ma YJ, Wang Y, Lu HX, Mao SH, Zhao SH. Microglia activation induces oxidative injury and decreases SIRT3 expression in dopaminergic neuronal cells. J Neural Transm (Vienna) 2019; 126:559-568. [PMID: 31004314 DOI: 10.1007/s00702-019-02005-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 04/12/2019] [Indexed: 12/23/2022]
Abstract
Microglia activation-mediated neuroinflammation plays an important role in the progression of Parkinson's disease (PD). However, effects of microglia activation on dopaminergic neuronal cell (DAC) fate are still poorly understood. The objective of this study was to explore the neurotoxic effects of microglia activation-mediated oxidative injury in DACs and its possible mechanisms. In the present study, microglia-DACs co-culture systems (murine BV-2 and MN9D cells, or primary microglia and mesencephalic neurons) were used to display the crosstalk between both cell types. The cytotoxicity of lipopolysaccharide-induced microglia activation led to the accumulation of intracellular reactive oxygen species, increased cell apoptosis rate, reduced number of DACs, concomitant to cell cycle arrest at G1 phase. Molecular mechanisms of apoptosis caused by microglia activation-induced oxidative injury included the increased opening of mitochondrial permeability transition pore and enhanced membrane potential depolarization in MN9D cells, down-regulation of Bcl-2 and up-regulation of Bax, caspase-3 expression in DACs. In addition, microglia activation made a significant reduction of SIRT3 and superoxide dismutase 2 gene expression in DACs. Taken together, these data imply that microglia activation promotes cell apoptosis through mitochondrial pathway and decreases SIRT3 expression in DACs, which may provide some support for PD progression promoted by neuroinflammation.
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Affiliation(s)
- De-Qi Jiang
- Department of Biology and Pharmacy, Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology, Yulin Normal University, Jiaoyudong Road No. 1303, Yuzhou District, Yulin, 537000, Guangxi Zhuang Autonomous Region, China
| | - Yan-Jiao Ma
- Department of Pharmacy, Zhujiang Hospital of Southern Medical University, Guangzhou, 510282, China
| | - Yong Wang
- Department of Pharmacy, Zhujiang Hospital of Southern Medical University, Guangzhou, 510282, China
| | - Hai-Xiao Lu
- Department of Biology and Pharmacy, Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology, Yulin Normal University, Jiaoyudong Road No. 1303, Yuzhou District, Yulin, 537000, Guangxi Zhuang Autonomous Region, China.
| | - Shu-Hui Mao
- Department of Biology and Pharmacy, Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology, Yulin Normal University, Jiaoyudong Road No. 1303, Yuzhou District, Yulin, 537000, Guangxi Zhuang Autonomous Region, China
| | - Shi-Hua Zhao
- Department of Biology and Pharmacy, Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology, Yulin Normal University, Jiaoyudong Road No. 1303, Yuzhou District, Yulin, 537000, Guangxi Zhuang Autonomous Region, China
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Abstract
Fatty acid-binding proteins (FABPs), a family of lipid chaperones, contribute to systemic metabolic regulation via several lipid signaling pathways. Fatty acid-binding protein 4 (FABP4), known as adipocyte FABP (A-FABP) or aP2, is mainly expressed in adipocytes and macrophages and plays important roles in the development of insulin resistance and atherosclerosis in relation to metabolically driven low-grade and chronic inflammation, referred to as ‘metaflammation’. FABP4 is secreted from adipocytes in a non-classical pathway associated with lipolysis and acts as an adipokine for the development of insulin resistance and atherosclerosis. Circulating FABP4 levels are associated with several aspects of metabolic syndrome and cardiovascular disease. Ectopic expression and function of FABP4 in cells and tissues are also related to the pathogenesis of several diseases. Pharmacological modification of FABP4 function by specific inhibitors, neutralizing antibodies or antagonists of unidentified receptors would be novel therapeutic strategies for several diseases, including obesity, diabetes mellitus, atherosclerosis and cardiovascular disease. Significant roles of FABP4 as a lipid chaperone in physiological and pathophysiological conditions and the possibility of FABP4 being a therapeutic target for metabolic and cardiovascular diseases are discussed in this review.
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Affiliation(s)
- Masato Furuhashi
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine
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Kurundkar D, Kurundkar AR, Bone NB, Becker EJ, Liu W, Chacko B, Darley-Usmar V, Zmijewski JW, Thannickal VJ. SIRT3 diminishes inflammation and mitigates endotoxin-induced acute lung injury. JCI Insight 2019; 4:120722. [PMID: 30626741 DOI: 10.1172/jci.insight.120722] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 12/05/2018] [Indexed: 12/30/2022] Open
Abstract
Acute lung injury (ALI) is characterized by exuberant proinflammatory responses and mitochondrial dysfunction. However, the link between mitochondrial dysfunction and inflammation in ALI is not well understood. In this report, we demonstrate a critical role for the mitochondrial NAD+-dependent deacetylase, sirtuin-3 (SIRT3), in regulating macrophage mitochondrial bioenergetics, ROS formation, and proinflammatory responses. We found that SIRT3 expression was significantly diminished in lungs of mice subjected to LPS-induced ALI. SIRT3-deficient mice (SIRT3-/-) develop more severe ALI compared with wild-type controls (SIRT3+/+). Macrophages obtained from SIRT3-/- mice show significant alterations in mitochondrial bioenergetic and redox homeostasis, in association with a proinflammatory phenotype characterized by NLRP3 inflammasome activation. The SIRT3 activator viniferin restored macrophage bioenergetic function in LPS-treated macrophages. Viniferin also reduced NLRP3 activation and the production of proinflammatory cytokines, effects that were absent in SIRT3-/- macrophages. In-vivo administration of viniferin reduced production of inflammatory mediators TNF-α, MIP-2, IL-6, IL-1β, and HMGB1, and diminished neutrophil influx and severity of endotoxin-mediated ALI; this protective effect of vinferin was abolished in SIRT3-/- mice. Taken together, our results show that the induction/activation of SIRT3 may serve as a new therapeutic strategy in ALI by modulating cellular bioenergetics, controlling inflammatory responses, and reducing the severity of lung injury.
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Affiliation(s)
| | - Ashish R Kurundkar
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | | | | | | | - Balu Chacko
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Victor Darley-Usmar
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, USA
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Xi J, Chen Y, Jing J, Zhang Y, Liang C, Hao Z, Zhang L. Sirtuin 3 suppresses the formation of renal calcium oxalate crystals through promoting M2 polarization of macrophages. J Cell Physiol 2018; 234:11463-11473. [PMID: 30588609 DOI: 10.1002/jcp.27803] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 11/01/2018] [Indexed: 01/10/2023]
Affiliation(s)
- Junhua Xi
- Department of Urology The First Affiliated Hospital of Anhui Medical University Hefei Anhui China
- Institute of Urology, Anhui Medical University Hefei Anhui China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University Hefei Anhui China
- Department of Urology Hefei Hospital Affiliated to Anhui Medical University (The Second People's Hospital of Hefei) Hefei Anhui China
| | - Yang Chen
- Department of Urology The First Affiliated Hospital of Anhui Medical University Hefei Anhui China
- Institute of Urology, Anhui Medical University Hefei Anhui China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University Hefei Anhui China
| | - Junfeng Jing
- Department of Urology Hefei Hospital Affiliated to Anhui Medical University (The Second People's Hospital of Hefei) Hefei Anhui China
| | - Yanbin Zhang
- Department of Urology The First Affiliated Hospital of Anhui Medical University Hefei Anhui China
- Institute of Urology, Anhui Medical University Hefei Anhui China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University Hefei Anhui China
- Department of Urology Hefei Hospital Affiliated to Anhui Medical University (The Second People's Hospital of Hefei) Hefei Anhui China
| | - Chaozhao Liang
- Department of Urology The First Affiliated Hospital of Anhui Medical University Hefei Anhui China
- Institute of Urology, Anhui Medical University Hefei Anhui China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University Hefei Anhui China
| | - Zongyao Hao
- Department of Urology The First Affiliated Hospital of Anhui Medical University Hefei Anhui China
- Institute of Urology, Anhui Medical University Hefei Anhui China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University Hefei Anhui China
| | - Li Zhang
- Department of Urology The First Affiliated Hospital of Anhui Medical University Hefei Anhui China
- Institute of Urology, Anhui Medical University Hefei Anhui China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University Hefei Anhui China
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Ge XN, Bastan I, Dileepan M, Greenberg Y, Ha SG, Steen KA, Bernlohr DA, Rao SP, Sriramarao P. FABP4 regulates eosinophil recruitment and activation in allergic airway inflammation. Am J Physiol Lung Cell Mol Physiol 2018; 315:L227-L240. [PMID: 29696987 PMCID: PMC6139653 DOI: 10.1152/ajplung.00429.2017] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 04/17/2018] [Accepted: 04/18/2018] [Indexed: 12/11/2022] Open
Abstract
Fatty acid binding protein 4 (FABP4), a member of a family of lipid-binding proteins, is known to play a role in inflammation by virtue of its ability to regulate intracellular events such as lipid fluxes and signaling. Studies have indicated a proinflammatory role for FABP4 in allergic asthma although its expression and function in eosinophils, the predominant inflammatory cells recruited to allergic airways, were not investigated. We examined expression of FABP4 in murine eosinophils and its role in regulating cell recruitment in vitro as well as in cockroach antigen (CRA)-induced allergic airway inflammation. CRA exposure led to airway recruitment of FABP4-expressing inflammatory cells, specifically eosinophils, in wild-type (WT) mice. FABP4 expression in eosinophils was induced by TNF-α as well as IL-4 and IL-13. FABP4-deficient eosinophils exhibited markedly decreased cell spreading/formation of leading edges on vascular cell adhesion molecule-1 and significantly decreased adhesion to intercellular adhesion molecule-1 associated with reduced β2-integrin expression relative to WT cells. Furthermore, FABP4-deficient eosinophils exhibited decreased migration, F-actin polymerization, calcium flux, and ERK(1/2) phosphorylation in response to eotaxin-1. In vivo, CRA-challenged FABP4-deficient mice exhibited attenuated eosinophilia and significantly reduced airway inflammation (improved airway reactivity, lower IL-5, IL-13, TNF-α, and cysteinyl leukotriene C4 levels, decreased airway structural changes) compared with WT mice. In conclusion, expression of FABP4 in eosinophils is induced during conditions of inflammation and plays a proinflammatory role in the development of allergic asthma by promoting eosinophil adhesion and migration and contributing to the development of various aspects of airway inflammation.
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Affiliation(s)
- Xiao Na Ge
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - Idil Bastan
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - Mythili Dileepan
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - Yana Greenberg
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - Sung Gil Ha
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - Kaylee A. Steen
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Saint Paul, Minnesota
| | - David A. Bernlohr
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Saint Paul, Minnesota
| | - Savita P. Rao
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
| | - P. Sriramarao
- Laboratory of Allergic Diseases and Inflammation, Department of Veterinary and Biomedical Sciences, Saint Paul, Minnesota
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Kowalski E, Geng S, Rathes A, Lu R, Li L. Toll-interacting protein differentially modulates HIF1α and STAT5-mediated genes in fibroblasts. J Biol Chem 2018; 293:12239-12247. [PMID: 29921584 DOI: 10.1074/jbc.ra118.003382] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 06/11/2018] [Indexed: 11/06/2022] Open
Abstract
Toll-interacting protein (Tollip) deficiency has been implicated in complex inflammatory and infectious diseases whose mechanisms are poorly understood. Comparing the gene expression profiles of WT and Tollip-deficient murine embryonic fibroblasts, we observed here that Tollip deficiency selectively reduces the expression of the inflammatory cytokines interleukin 6 (IL-6), IL-12, and tumor necrosis factor α (TNFα) but potentiates the expression of fatty acid-binding protein 4 (FABP4) in these cells. We also observed that expression of hypoxia-inducible factor 1-α (HIF1α) is reduced, whereas that of signal transducer and activator of transcription 5 (STAT5) is elevated, in Tollip-deficient cells, correlating with the decreased expression of inflammatory cytokines and increased expression of FABP4 in these cells. We further found that the coupling of ubiquitin to ER degradation (CUE) domain of Tollip is required for stimulating HIF1α activity, because Tollip CUE-domain mutant cells exhibited reduced levels of HIF1α and selected cytokines. Tollip is known to mediate autophagy and lysosome fusion, and herein we observed that Tollip's autophagy function is required for modulating STAT5 and FABP4 expression. Bafilomycin A, an inhibitor of lysosome fusion, enhanced STAT5 and FABP4 expression in WT fibroblasts, whereas torin 2, an activator of autophagy, reduced STAT5 and FABP4 expression in Tollip-deficient fibroblasts. Taken together, our study reveals that Tollip differentially modulates HIF1α and STAT5 expression in fibroblasts, potentially explaining the complex and context-dependent contribution of Tollip to disease development.
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Affiliation(s)
- Elizabeth Kowalski
- Department of Biological Sciences and Biochemistry, Virginia Tech, Blacksburg, Virginia 24061
| | - Shuo Geng
- Department of Biological Sciences and Biochemistry, Virginia Tech, Blacksburg, Virginia 24061
| | - Allison Rathes
- Department of Biological Sciences and Biochemistry, Virginia Tech, Blacksburg, Virginia 24061
| | - Ran Lu
- Department of Biological Sciences and Biochemistry, Virginia Tech, Blacksburg, Virginia 24061
| | - Liwu Li
- Department of Biological Sciences and Biochemistry, Virginia Tech, Blacksburg, Virginia 24061.
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Li D, Liu Q, Sun W, Chen X, Wang Y, Sun Y, Lin L. 1,3,6,7-Tetrahydroxy-8-prenylxanthone ameliorates inflammatory responses resulting from the paracrine interaction of adipocytes and macrophages. Br J Pharmacol 2018; 175:1590-1606. [PMID: 29446826 DOI: 10.1111/bph.14162] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 12/29/2017] [Accepted: 01/18/2018] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND AND PURPOSE Chronic inflammation in adipose tissue is critical in the onset and development of insulin resistance and type 2 diabetes. Macrophage infiltration into adipose tissue and pro-inflammatory polarization play key roles in adipose tissue inflammation. The fruit hull of mangosteen (Garcinia mangostana) is used in traditional medicine to treat various inflammatory diseases. However, its role in regulating adipose tissue inflammation is unexplored. This study was designed to identify xanthones from G. mangostana, which could ameliorate adipose tissue inflammation. EXPERIMENTAL APPROACH Expressions of inducible NOS, cytokines, chemokines and components of the NF-κB and MAPKs pathways were evaluated using Western blotting, immunofluorescence, quantitative real-time PCR or ELISA. The migration of macrophages towards adipocytes was tested using Transwell experiments in vitro. A murine model of LPS-induced acute inflammation was used to examine effects of 1,3,6,7-tetrahydroxy-8-prenylxanthone (TPX) on inflammatory responses in adipose tissue in vivo. KEY RESULTS From a series of xanthones isolated from G. mangostana, TPX was identified as a potent inhibitor of LPS-induced NO production and IL-6 secretion in RAW264.7 macrophages. TPX ameliorated LPS-induced inflammatory responses in RAW264.7 macrophages, and TNF-α-mediated inflammation in 3T3-L1 adipocytes, through inhibiting MAPKs and NF-κB activation and promoting sirtuin 3 expression. TPX also blocked RAW264.7 macrophages migration towards 3T3-L1 adipocytes in co-cultures. Furthermore, TPX alleviated LPS-induced adipose tissue inflammation in vivo by reducing pro-inflammatory cytokines and preventing the pro-inflammatory polarization of macrophages. CONCLUSIONS AND IMPLICATIONS Taken together, our results indicate that TPX disrupts the inflammatory responses between macrophages and adipocytes, and attenuates adipose tissue inflammation.
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Affiliation(s)
- Dan Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China
| | - Qianyu Liu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China
| | - Wen Sun
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China
| | - Xiuping Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China
| | - Ying Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China
| | - Yuxiang Sun
- Department of Nutrition and Food Science, Texas A&M University, College Station, TX, USA
| | - Ligen Lin
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China
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Jahansouz C, Xu H, Hertzel AV, Kizy SS, Steen KA, Foncea R, Serrot FJ, Kvalheim N, Luthra G, Ewing K, Leslie DB, Ikramuddin S, Bernlohr DA. Partitioning of adipose lipid metabolism by altered expression and function of PPAR isoforms after bariatric surgery. Int J Obes (Lond) 2018; 42:139-146. [PMID: 28894292 PMCID: PMC5803459 DOI: 10.1038/ijo.2017.197] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/10/2017] [Accepted: 08/02/2017] [Indexed: 12/16/2022]
Abstract
BACKGROUND Bariatric surgery remains the most effective treatment for reducing adiposity and eliminating type 2 diabetes; however, the mechanism(s) responsible have remained elusive. Peroxisome proliferator-activated receptors (PPAR) encompass a family of nuclear hormone receptors that upon activation exert control of lipid metabolism, glucose regulation and inflammation. Their role in adipose tissue following bariatric surgery remains undefined. MATERIALS AND METHODS Subcutaneous adipose tissue biopsies and serum were obtained and evaluated from time of surgery and on postoperative day 7 in patients randomized to Roux-en-Y gastric bypass (n=13) or matched caloric restriction (n=14), as well as patients undergoing vertical sleeve gastrectomy (n=33). Fat samples were evaluated for changes in gene expression, protein levels, β-oxidation, lipolysis and cysteine oxidation. RESULTS Within 7 days, bariatric surgery acutely drives a change in the activity and expression of PPARγ and PPARδ in subcutaneous adipose tissue thereby attenuating lipid storage, increasing lipolysis and potentiating lipid oxidation. This unique metabolic alteration leads to changes in downstream PPARγ/δ targets including decreased expression of fatty acid binding protein (FABP) 4 and stearoyl-CoA desaturase-1 (SCD1) with increased expression of carnitine palmitoyl transferase 1 (CPT1) and uncoupling protein 2 (UCP2). Increased expression of UCP2 not only facilitated fatty acid oxidation (increased 15-fold following surgery) but also regulated the subcutaneous adipose tissue redoxome by attenuating protein cysteine oxidation and reducing oxidative stress. The expression of UCP1, a mitochondrial protein responsible for the regulation of fatty acid oxidation and thermogenesis in beige and brown fat, was unaltered following surgery. CONCLUSIONS These results suggest that bariatric surgery initiates a novel metabolic shift in subcutaneous adipose tissue to oxidize fatty acids independently from the beiging process through regulation of PPAR isoforms. Further studies are required to understand the contribution of this shift in expression of PPAR isoforms to weight loss following bariatric surgery.
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Affiliation(s)
- Cyrus Jahansouz
- Department of Surgery, University of Minnesota. Minneapolis, MN 55455
| | - Hongliang Xu
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, MN, 55455
| | - Ann V. Hertzel
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, MN, 55455
| | - Scott S. Kizy
- Department of Surgery, University of Minnesota. Minneapolis, MN 55455
| | - Kaylee A. Steen
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, MN, 55455
| | - Rocio Foncea
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, MN, 55455
| | | | - Nicholas Kvalheim
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, MN, 55455
| | - Girish Luthra
- Park Nicollet Bariatric Surgery Center, St. Louis Park, MN
| | | | - Daniel B. Leslie
- Department of Surgery, University of Minnesota. Minneapolis, MN 55455
| | - Sayeed Ikramuddin
- Department of Surgery, University of Minnesota. Minneapolis, MN 55455
| | - David A. Bernlohr
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, MN, 55455
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Song C, Tan P, Zhang Z, Wu W, Dong Y, Zhao L, Liu H, Guan H, Li F. REV-ERB agonism suppresses osteoclastogenesis and prevents ovariectomy-induced bone loss partially via FABP4 upregulation. FASEB J 2018; 32:3215-3228. [PMID: 29401617 DOI: 10.1096/fj.201600825rrr] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
REV-ERBs (REV-ERBα and REV-ERBβ) are transcription repressors and circadian regulators. Previous investigations have shown that REV-ERBs repress the expression of target genes, including MMP9 and CX3CR1, in macrophages. Because MMP9 and CX3CR1 reportedly participate in receptor activator of nuclear factor-κB ligand (RANKL)-induced osteoclastogenesis, we inferred that REV-ERBs might play a role in osteoclastogenesis. In the present study, we found that the REV-ERBα level decreased significantly during RANKL-induced osteoclast differentiation from primary bone marrow-derived macrophages (BMMs). REV-ERBα knockdown by small interfering RNA in BMMs resulted in the enhanced formation of osteoclasts, whereas REV-ERBβ knockdown showed no effect on osteoclast differentiation. Moreover, the REV-ERB agonist SR9009 inhibited osteoclast differentiation and bone resorption. Intraperitoneal SR9009 administration prevented ovariectomy-induced bone loss; this effect was accompanied by decreased serum RANKL and C-terminal telopeptide of type I collagen levels and increased osteoprotegerin levels. Further investigation revealed that NF-κB and MAPK activation and nuclear factor of activated T cells, cytoplasmic 1, and c-fos expression were suppressed by SR9009. The level of reactive oxygen species was also decreased by SR9009, with NADPH oxidase subunits also being down-regulated. In addition, an expression microarray showed that FABP4, an intracellular lipid-binding protein, was up-regulated by REV-ERB agonism. BMS309403, an inhibitor of FABP4, partially prevented the suppression of osteoclastogenesis by SR9009 through stabilizing phosphorylation of p65. To summarize, our results proved that the REV-ERB agonism inhibited osteoclastogenesis partially via FABP4 up-regulation.-Song, C., Tan, P., Zhang, Z., Wu, W., Dong, Y., Zhao, L., Liu, H., Guan, H., Li, F. REV-ERB agonism suppresses osteoclastogenesis and prevents ovariectomy-induced bone loss partially via FABP4 upregulation.
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Affiliation(s)
- Chao Song
- Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Peng Tan
- Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zheng Zhang
- Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Wu
- Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yonghui Dong
- Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liming Zhao
- Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huiyong Liu
- Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hanfeng Guan
- Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Biological Engineering and Regenerative Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Feng Li
- Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Biological Engineering and Regenerative Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Wu G, Yang L, Xu Y, Jiang X, Jiang X, Huang L, Mao L, Cai S. FABP4 induces asthmatic airway epithelial barrier dysfunction via ROS-activated FoxM1. Biochem Biophys Res Commun 2017; 495:1432-1439. [PMID: 29158087 DOI: 10.1016/j.bbrc.2017.11.106] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 11/17/2017] [Indexed: 12/25/2022]
Abstract
Functional abnormal airway epithelial cells, along with activated inflammatory cells, resulting in chronic airway inflammation, are considered as the characteristic of asthma. Fatty Acid Binding Protein 4 (FABP4) takes part in glucose and lipid homeostasis, and also have an important role in allergic airway inflammation. However, whether FABP4 influence barrier function of airway epithelial cells is unknown. In vivo, a HDM-induced murine model of asthma was obtained to assessed airway inflammation and protein expression of E-cadherin and Forkhead Box M1 (FoxM1). In vitro, 16-HBE was cultured and was treated with hrFABP4, siFABP4, FABPF4 inhibitor BMS, or FoxM1 inhibitor RCM-1. IL-4, IL-5, and IL-13 level was determined by ELISA. Transepithelial electrical resistance (TER), paracellular permeability and E-cadherin-special immunofluorescence were measured to value airway epithelial barrier function. Intracellular ROS production was determined by DCF-DA fluorescence. FABP4 inhibitor BMS alleviate airway inflammation and destruction of E-cad in allergic mouse. Treatment with HDM or hrFABP4 aggravated inflammatory response, damaged airway epithelial barrier, which could be inhibited by siFABP4 and BMS. Treatment with HDM or hrFABP4 also enhanced levels of FoxM1, and Inhibited FoxM1 suppressed HDM- and hrFABP4-induced inflammation and airway epithelial barrier dysfunction. In addition, H2O2 promoted FoxM1 expression, HDM and hrFABP4 induced-FoxM1 could be inhibited by NAC, leading to decreased inflammation and improved airway epithelial barrier. Upregulated ROS induced by FABP4 was of significance in activating FoxM1 leading to airway inflammation and epithelial barrier dysfunction.
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Affiliation(s)
- Gaohui Wu
- Department of Respiratory and Critical Care Medicine, Chronic Airways Diseases Laboratory, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China; Shenzhen Luohu People's Hospital, The Third Affiliatied Hospital of Shenzhen University, Shenzhen, Guangdong 518000, China
| | - Liteng Yang
- Shenzhen Luohu People's Hospital, The Third Affiliatied Hospital of Shenzhen University, Shenzhen, Guangdong 518000, China
| | - Yi Xu
- Shenzhen Luohu People's Hospital, The Third Affiliatied Hospital of Shenzhen University, Shenzhen, Guangdong 518000, China
| | - Xiaohong Jiang
- Department of The Geriatric Respiratory, The First Affiliated Hospital of Guangxi Medical University, Guangxi 530021, China
| | - Xiaomin Jiang
- Shenzhen Luohu People's Hospital, The Third Affiliatied Hospital of Shenzhen University, Shenzhen, Guangdong 518000, China
| | - Lisha Huang
- Shenzhen Luohu People's Hospital, The Third Affiliatied Hospital of Shenzhen University, Shenzhen, Guangdong 518000, China
| | - Ling Mao
- Shenzhen Luohu People's Hospital, The Third Affiliatied Hospital of Shenzhen University, Shenzhen, Guangdong 518000, China
| | - Shaoxi Cai
- Department of Respiratory and Critical Care Medicine, Chronic Airways Diseases Laboratory, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
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Jourdan T, Nicoloro SM, Zhou Z, Shen Y, Liu J, Coffey NJ, Cinar R, Godlewski G, Gao B, Aouadi M, Czech MP, Kunos G. Decreasing CB 1 receptor signaling in Kupffer cells improves insulin sensitivity in obese mice. Mol Metab 2017; 6:1517-1528. [PMID: 29107297 PMCID: PMC5681272 DOI: 10.1016/j.molmet.2017.08.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 08/24/2017] [Accepted: 08/25/2017] [Indexed: 12/15/2022] Open
Abstract
Objective Obesity-induced accumulation of ectopic fat in the liver is thought to contribute to the development of insulin resistance, and increased activity of hepatic CB1R has been shown to promote both processes. However, lipid accumulation in liver can be experimentally dissociated from insulin resistance under certain conditions, suggesting the involvement of additional mechanisms. Obesity is also associated with pro-inflammatory changes which, in turn, can promote insulin resistance. Kupffer cells (KCs), the liver's resident macrophages, are the major source of pro-inflammatory cytokines in the liver, such as TNF-α, which has been shown to inhibit insulin signaling in multiple cell types, including hepatocytes. Here, we sought to identify the role of CB1R in KCs in obesity-induced hepatic insulin resistance. Methods We used intravenously administered β-D-glucan-encapsulated siRNA to knock-down CB1R gene expression selectively in KCs. Results We demonstrate that a robust knock-down of the expression of Cnr1, the gene encoding CB1R, results in improved glucose tolerance and insulin sensitivity in diet-induced obese mice, without affecting hepatic lipid content or body weight. Moreover, Cnr1 knock-down in KCs was associated with a shift from pro-inflammatory M1 to anti-inflammatory M2 cytokine profile and improved insulin signaling as reflected by increased insulin-induced Akt phosphorylation. Conclusion These findings suggest that CB1R expressed in KCs plays a critical role in obesity-related hepatic insulin resistance via a pro-inflammatory mechanism. CB1R signaling promotes hepatic insulin resistance by promoting hepatic steatosis and hepatic inflammation. CB1R knock-down in liver macrophages (Kupffer cells, KCs) improves global insulin resistance and glucose homeostasis. CB1R expressed in KCs play a critical role in hepatic insulin resistance independent of ectopic fat in the liver or adipose tissue inflammation.
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Affiliation(s)
- Tony Jourdan
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), Bethesda, MD 20852, USA.
| | - Sarah M Nicoloro
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Zhou Zhou
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), Bethesda, MD 20852, USA
| | - Yuefei Shen
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Jie Liu
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), Bethesda, MD 20852, USA
| | - Nathan J Coffey
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), Bethesda, MD 20852, USA
| | - Resat Cinar
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), Bethesda, MD 20852, USA
| | - Grzegorz Godlewski
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), Bethesda, MD 20852, USA
| | - Bin Gao
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), Bethesda, MD 20852, USA
| | - Myriam Aouadi
- Integrated Cardio Metabolic Centre, Department of Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Michael P Czech
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - George Kunos
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), Bethesda, MD 20852, USA.
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Ciarlo E, Heinonen T, Lugrin J, Acha-Orbea H, Le Roy D, Auwerx J, Roger T. Sirtuin 3 deficiency does not alter host defenses against bacterial and fungal infections. Sci Rep 2017. [PMID: 28634345 PMCID: PMC5478639 DOI: 10.1038/s41598-017-04263-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Sirtuin 3 (SIRT3) is the main mitochondrial deacetylase. SIRT3 regulates cell metabolism and redox homeostasis, and protects from aging and age-associated pathologies. SIRT3 may drive both oncogenic and tumor-suppressive effects. SIRT3 deficiency has been reported to promote chronic inflammation-related disorders, but whether SIRT3 impacts on innate immune responses and host defenses against infections remains essentially unknown. This aspect is of primary importance considering the great interest in developing SIRT3-targeted therapies. Using SIRT3 knockout mice, we show that SIRT3 deficiency does not affect immune cell development and microbial ligand-induced proliferation and cytokine production by splenocytes, macrophages and dendritic cells. Going well along with these observations, SIRT3 deficiency has no major impact on cytokine production, bacterial burden and survival of mice subjected to endotoxemia, Escherichia coli peritonitis, Klebsiella pneumoniae pneumonia, listeriosis and candidiasis of diverse severity. These data suggest that SIRT3 is not critical to fight infections and support the safety of SIRT3-directed therapies based on SIRT3 activators or inhibitors for treating metabolic, oncologic and neurodegenerative diseases without putting patients at risk of infection.
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Affiliation(s)
- Eleonora Ciarlo
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, CH-1066, Epalinges, Switzerland
| | - Tytti Heinonen
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, CH-1066, Epalinges, Switzerland
| | - Jérôme Lugrin
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, CH-1066, Epalinges, Switzerland
| | - Hans Acha-Orbea
- Department of Biochemistry, University of Lausanne, CH-1066, Epalinges, Switzerland
| | - Didier Le Roy
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, CH-1066, Epalinges, Switzerland
| | - Johan Auwerx
- Laboratory for Integrative and Systems Physiology, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
| | - Thierry Roger
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital, CH-1066, Epalinges, Switzerland.
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Hertzel AV, Xu H, Downey M, Kvalheim N, Bernlohr DA. Fatty acid binding protein 4/aP2-dependent BLT1R expression and signaling. J Lipid Res 2017; 58:1354-1361. [PMID: 28546450 DOI: 10.1194/jlr.m074542] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 05/24/2017] [Indexed: 12/27/2022] Open
Abstract
Previous studies have shown that reduced levels of the adipocyte fatty acid binding protein (FABP)4 (AFABP/aP2), result in metabolic improvement including potentiated insulin sensitivity and attenuated atherosclerosis. Mechanistically, pharmacologic or genetic inhibition of FABP4 in macrophages upregulates UCP2, attenuates reactive oxygen species (ROS) production, polarizes cells toward the anti-inflammatory M2 state, and reduces leukotriene (LT) secretion. At the protein level, FABP4 stabilizes LTA4 toward chemical hydrolysis, thereby potentiating inflammatory LTC4 synthesis. Herein, we extend the FABP4-LT axis and demonstrate that genetic knockout of FABP4 reduces expression of the major macrophage LT receptor, LTB4 receptor 1 (BLT1R), via a ROS-dependent mechanism. Consistent with inflammation driving BLT1R expression, M1 polarized macrophages express increased levels of BLT1R relative to M2 polarized macrophages and treatment with proinflammatory lipopolysaccharide increased BLT1R mRNA and protein expression. In FABP4 knockout macrophages, silencing of UCP2, increased ROS levels and led to increased expression of BLT1R mRNA. Similarly, addition of exogenous H2O2 upregulated BLT1R expression, whereas the addition of a ROS scavenger, N-acetyl cysteine, decreased BLT1R levels. As compared with WT macrophages, LTB4-BLT1R-dependent JAK2-phosphorylation was reduced in FABP4 knockout macrophages. In summary, these results indicate that FABP4 regulates the expression of BLT1R and its downstream signaling via control of oxidative stress in macrophages.
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Affiliation(s)
- Ann V Hertzel
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN 55455
| | - Hongliang Xu
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN 55455
| | - Michael Downey
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN 55455
| | - Nicholas Kvalheim
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN 55455
| | - David A Bernlohr
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN 55455.
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