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Homan EA, Gilani A, Rubio-Navarro A, Johnson M, Cortada E, Pereira de Lima R, Stoll L, Lo JC. Complement 3a Receptor 1 on Macrophages and Kupffer cells is not required for the Pathogenesis of Metabolic Dysfunction-Associated Steatotic Liver Disease. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.06.26.24309550. [PMID: 38978661 PMCID: PMC11230319 DOI: 10.1101/2024.06.26.24309550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Together with obesity and type 2 diabetes, metabolic dysfunction-associated steatotic liver disease (MASLD) is a growing global epidemic. Activation of the complement system and infiltration of macrophages has been linked to progression of metabolic liver disease. The role of complement receptors in macrophage activation and recruitment in MASLD remains poorly understood. In human and mouse, C3AR1 in the iver is expressed primarily in Kupffer cells, but is downregulated in humans with MASLD compared to obese controls. To test the role of complement 3a receptor (C3aR1) on macrophages and liver resident macrophages in MASLD, we generated mice deficient in C3aR1 on all macrophages (C3aR1-MφKO) or specifically in liver Kupffer cells (C3aR1-KpKO) and subjected them to a model of metabolic steatotic liver disease. We show that macrophages account for the vast majority of C3ar1 expression in the liver. Overall, C3aR1-MφKO and C3aR1-KpKO mice have similar body weight gain without significant alterations in glucose homeostasis, hepatic steatosis and fibrosis, compared to controls on a MASLD-inducing diet. This study demonstrates that C3aR1 deletion in macrophages or Kupffer cells, the predominant liver cell type expressing C3aR1, has no significant effect on liver steatosis, inflammation or fibrosis in a dietary MASLD model.
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Affiliation(s)
- Edwin A. Homan
- Division of Cardiology, Department of Medicine, Cardiovascular Research Institute, Weill Center for Metabolic Health, Weill Cornell Medicine, New York, New York, 10021
| | - Ankit Gilani
- Division of Cardiology, Department of Medicine, Cardiovascular Research Institute, Weill Center for Metabolic Health, Weill Cornell Medicine, New York, New York, 10021
| | - Alfonso Rubio-Navarro
- Division of Cardiology, Department of Medicine, Cardiovascular Research Institute, Weill Center for Metabolic Health, Weill Cornell Medicine, New York, New York, 10021
| | - Maya Johnson
- Division of Cardiology, Department of Medicine, Cardiovascular Research Institute, Weill Center for Metabolic Health, Weill Cornell Medicine, New York, New York, 10021
| | - Eric Cortada
- Division of Cardiology, Department of Medicine, Cardiovascular Research Institute, Weill Center for Metabolic Health, Weill Cornell Medicine, New York, New York, 10021
| | - Renan Pereira de Lima
- Division of Cardiology, Department of Medicine, Cardiovascular Research Institute, Weill Center for Metabolic Health, Weill Cornell Medicine, New York, New York, 10021
| | - Lisa Stoll
- Division of Cardiology, Department of Medicine, Cardiovascular Research Institute, Weill Center for Metabolic Health, Weill Cornell Medicine, New York, New York, 10021
| | - James C. Lo
- Division of Cardiology, Department of Medicine, Cardiovascular Research Institute, Weill Center for Metabolic Health, Weill Cornell Medicine, New York, New York, 10021
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Ma L, Gilani A, Rubio-Navarro A, Cortada E, Li A, Reilly SM, Tang L, Lo JC. Adipsin and adipocyte-derived C3aR1 regulate thermogenic fat in a sex-dependent fashion. JCI Insight 2024; 9:e178925. [PMID: 38713526 DOI: 10.1172/jci.insight.178925] [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: 12/27/2023] [Accepted: 04/26/2024] [Indexed: 05/09/2024] Open
Abstract
Thermogenesis in beige/brown adipose tissues can be leveraged to combat metabolic disorders such as type 2 diabetes and obesity. The complement system plays pleiotropic roles in metabolic homeostasis and organismal energy balance with canonical effects on immune cells and noncanonical effects on nonimmune cells. The adipsin/C3a/C3a receptor 1 (C3aR1) pathway stimulates insulin secretion and sustains pancreatic β cell mass. However, its role in adipose thermogenesis has not been defined. Here, we show that male Adipsin/Cfd-knockout mice exhibited increased energy expenditure and white adipose tissue (WAT) browning. In addition, male adipocyte-specific C3aR1-knockout mice exhibited enhanced WAT thermogenesis and increased respiration. In stark contrast, female adipocyte-specific C3aR1-knockout mice displayed decreased brown fat thermogenesis and were cold intolerant. Female mice expressed lower levels of Adipsin in thermogenic adipocytes and adipose tissues than males. C3aR1 was also lower in female subcutaneous adipose tissue than in males. Collectively, these results reveal sexual dimorphism in the adipsin/C3a/C3aR1 axis in regulating adipose thermogenesis and defense against cold stress. Our findings establish a potentially new role of the alternative complement pathway in adaptive thermogenesis and highlight sex-specific considerations in potential therapeutic targets for metabolic diseases.
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Affiliation(s)
- Lunkun Ma
- Division of Cardiology, Department of Medicine
- Weill Center for Metabolic Health; and
- Cardiovascular Research Institute, Weill Cornell Medicine, New York, New York, USA
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Ankit Gilani
- Division of Cardiology, Department of Medicine
- Weill Center for Metabolic Health; and
- Cardiovascular Research Institute, Weill Cornell Medicine, New York, New York, USA
| | - Alfonso Rubio-Navarro
- Division of Cardiology, Department of Medicine
- Weill Center for Metabolic Health; and
- Cardiovascular Research Institute, Weill Cornell Medicine, New York, New York, USA
| | - Eric Cortada
- Division of Cardiology, Department of Medicine
- Weill Center for Metabolic Health; and
- Cardiovascular Research Institute, Weill Cornell Medicine, New York, New York, USA
| | - Ang Li
- Division of Cardiology, Department of Medicine
- Weill Center for Metabolic Health; and
- Cardiovascular Research Institute, Weill Cornell Medicine, New York, New York, USA
| | - Shannon M Reilly
- Division of Cardiology, Department of Medicine
- Weill Center for Metabolic Health; and
| | - Liling Tang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - James C Lo
- Division of Cardiology, Department of Medicine
- Weill Center for Metabolic Health; and
- Cardiovascular Research Institute, Weill Cornell Medicine, New York, New York, USA
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3
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Nguyen VD, Hughes TR, Zhou Y. From complement to complosome in non-alcoholic fatty liver disease: When location matters. Liver Int 2024; 44:316-329. [PMID: 38010880 DOI: 10.1111/liv.15796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 10/21/2023] [Accepted: 11/09/2023] [Indexed: 11/29/2023]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a growing public health threat and becoming the leading cause of liver transplantation. Nevertheless, no approved specific treatment is currently available for NAFLD. The pathogenesis of NAFLD is multifaceted and not yet fully understood. Accumulating evidence suggests a significant role of the complement system in the development and progression of NAFLD. Here, we provide an overview of the complement system, incorporating the novel concept of complosome, and summarise the up-to-date evidence elucidating the association between complement dysregulation and the pathogenesis of NAFLD. In this process, the extracellular complement system is activated through various pathways, thereby directly contributing to, or working together with other immune cells in the disease development and progression. We also introduce the complosome and assess the evidence that implicates its potential influence in NAFLD through its direct impact on hepatocytes or non-parenchymal liver cells. Additionally, we expound upon how complement system and the complosome may exert their effects in relation with hepatic zonation in NAFLD. Furthermore, we discuss the potential therapeutic implications of targeting the complement system, extracellularly and intracellularly, for NAFLD treatment. Finally, we present future perspectives towards a better understanding of the complement system's contribution to NAFLD.
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Affiliation(s)
- Van-Dien Nguyen
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
- Systems Immunity Research Institute, Cardiff University, Cardiff, UK
| | - Timothy R Hughes
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
- Systems Immunity Research Institute, Cardiff University, Cardiff, UK
| | - You Zhou
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
- Systems Immunity Research Institute, Cardiff University, Cardiff, UK
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4
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Shah DS, McNeilly AD, McCrimmon RJ, Hundal HS. The C5aR1 complement receptor: A novel immunomodulator of insulin action in skeletal muscle. Cell Signal 2024; 113:110944. [PMID: 37890688 DOI: 10.1016/j.cellsig.2023.110944] [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: 08/31/2023] [Revised: 10/08/2023] [Accepted: 10/24/2023] [Indexed: 10/29/2023]
Abstract
The complement system constitutes an integral component of the innate immune system and plays a critical role in adaptive immunity. Activation of this system engenders the production of complement peptide fragments, including C5a, which engage G-protein coupled receptors predominantly expressed in immune-associated cells, such as neutrophils, initiating pro-inflammatory responses. Intriguingly, our investigation has unveiled the presence of C5a receptor 1 (C5aR1) expression within skeletal muscle, a key metabolic tissue and primary target of insulin. Herein, we demonstrate that C5aR1 activation by C5a in differentiated human skeletal muscle cells elicits acute suppression of insulin signalling. This suppression manifests as impaired insulin-dependent association between IRS1 and the p85 subunit of PI3-kinase, a 50% reduction in Akt phosphorylation, and a 60% decline in insulin-stimulated glucose uptake. This impairment in insulin signalling is associated with a three-fold elevation in intramyocellular diacylglycerol (DAG) levels and a two-fold increase in cytosolic calcium content, which promote PKC-mediated IRS1 inhibition via enhanced phosphorylation at IRS1 Ser1101. Significantly, our findings demonstrate that structurally diverse C5aR1 antagonists, along with genetic deletion or stable silencing of C5aR1 by 80% using short-hairpin RNA, effectively attenuate repression of insulin signalling by C5a in LHCN-M2 human skeletal myotubes. These results underscore the potential of heightened C5aR1 activation, characteristic of obesity and chronic inflammatory conditions, to detrimentally impact insulin function within skeletal muscle cells. Additionally, the study suggests that agents targeting the C5a-C5aR axis, originally devised for mitigating complement-dependent inflammatory conditions, may offer therapeutic avenues to ameliorate immune-driven insulin resistance in key peripheral metabolic tissues, including skeletal muscle.
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Affiliation(s)
- Dinesh S Shah
- Division of Cell Signalling and Immunology, Sir James Black Centre, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK
| | - Alison D McNeilly
- Division of Systems Medicine, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
| | - Rory J McCrimmon
- Division of Systems Medicine, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
| | - Harinder S Hundal
- Division of Cell Signalling and Immunology, Sir James Black Centre, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK.
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5
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Rodriguez P, Laskowski LJ, Pallais JP, Bock HA, Cavalco NG, Anderson EI, Calkins MM, Razzoli M, Sham YY, McCorvy JD, Bartolomucci A. Functional profiling of the G protein-coupled receptor C3aR1 reveals ligand-mediated biased agonism. J Biol Chem 2024; 300:105549. [PMID: 38072064 PMCID: PMC10796979 DOI: 10.1016/j.jbc.2023.105549] [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: 07/20/2023] [Revised: 11/21/2023] [Accepted: 12/02/2023] [Indexed: 12/29/2023] Open
Abstract
G protein-coupled receptors (GPCRs) are leading druggable targets for several medicines, but many GPCRs are still untapped for their therapeutic potential due to poor understanding of specific signaling properties. The complement C3a receptor 1 (C3aR1) has been extensively studied for its physiological role in C3a-mediated anaphylaxis/inflammation, and in TLQP-21-mediated lipolysis, but direct evidence for the functional relevance of the C3a and TLQP-21 ligands and signal transduction mechanisms are still limited. In addition, C3aR1 G protein coupling specificity is still unclear, and whether endogenous ligands, or drug-like compounds, show ligand-mediated biased agonism is unknown. Here, we demonstrate that C3aR1 couples preferentially to Gi/o/z proteins and can recruit β-arrestins to cause internalization. Furthermore, we showed that in comparison to C3a63-77, TLQP-21 exhibits a preference toward Gi/o-mediated signaling compared to β-arrestin recruitment and internalization. We also show that the purported antagonist SB290157 is a very potent C3aR1 agonist, where antagonism of ligand-stimulated C3aR1 calcium flux is caused by potent β-arrestin-mediated internalization. Finally, ligand-mediated signaling bias impacted cell function as demonstrated by the regulation of calcium influx, lipolysis in adipocytes, phagocytosis in microglia, and degranulation in mast cells. Overall, we characterize C3aR1 as a Gi/o/z-coupled receptor and demonstrate the functional relevance of ligand-mediated signaling bias in key cellular models. Due to C3aR1 and its endogenous ligands being implicated in inflammatory and metabolic diseases, these results are of relevance toward future C3aR1 drug discovery.
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Affiliation(s)
- Pedro Rodriguez
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, Minnesota, USA
| | - Lauren J Laskowski
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Jean Pierre Pallais
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, Minnesota, USA
| | - Hailey A Bock
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Natalie G Cavalco
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Emilie I Anderson
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Maggie M Calkins
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Maria Razzoli
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, Minnesota, USA
| | - Yuk Y Sham
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, Minnesota, USA
| | - John D McCorvy
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
| | - Alessandro Bartolomucci
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, Minnesota, USA.
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6
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Gao M, Li J, Zhang R, Li N, Li W, Zhang S, Wang P, Wang H, Fang Z, Yu Z, Hu G, Leng J, Yang X. Serum mannan-binding lectin-associated serine proteases in early pregnancy for gestational diabetes in Chinese pregnant women. Front Endocrinol (Lausanne) 2023; 14:1230244. [PMID: 37941903 PMCID: PMC10628726 DOI: 10.3389/fendo.2023.1230244] [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] [Received: 05/28/2023] [Accepted: 09/27/2023] [Indexed: 11/10/2023] Open
Abstract
Aims This study aimed to explore associations of mannan-binding lectin-associated serine protease (MASP) levels in early pregnancy with gestational diabetes mellitus (GDM). We also examined interactions of MASPs and deoxycholic acid (DCA)/glycoursodeoxycholic acid (GUDCA) for the GDM risk and whether the interactive effects if any on the GDM risk were mediated via lysophosphatidylcholine (LPC) 18:0. Materials and methods A 1:1 case-control study (n = 414) nested in a prospective cohort of pregnant women was conducted in Tianjin, China. Binary conditional logistic regressions were performed to examine associations of MASPs with the GDM risk. Additive interaction measures were used to examine interactions between MASPs and DCA/GUDCA for the GDM risk. Mediation analyses and Sobel tests were used to examine mediation effects of LPC18:0 between the copresence of MASPs and DCA/GUDCA on the GDM risk. Results High MASP-2 was independently associated with GDM [odds ratio (OR): 2.62, 95% confidence interval (CI): 1.44-4.77], while the effect of high MASP-1 on GDM was attributable to high MASP-2 (P for Sobel test: 0.003). Low DCA markedly increased the OR of high MASP-2 alone from 2.53 (1.10-5.85) up to 10.6 (4.22-26.4), with a significant additive interaction. In addition, high LPC18:0 played a significant mediating role in the links from low DCA to GDM and from the copresence of high MASP-2 and low DCA to GDM (P for Sobel test <0.001) but not in the link from high MASP-2 to GDM. Conclusions High MASP-1 and MASP-2 in early pregnancy were associated with GDM in Chinese pregnant women. MASP-2 amplifies the risk of low DCA for GDM, which is mediated via LPC18:0.
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Affiliation(s)
- Ming Gao
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China
| | - Jing Li
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin Medical University School of Public Health, Tianjin, China
- Tianjin Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin Medical University School of Public Health, Tianjin, China
| | - Rui Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China
| | - Ninghua Li
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China
| | - Weiqin Li
- Project Office, Tianjin Women and Children’s Health Center, Tianjin, China
| | - Shuang Zhang
- Project Office, Tianjin Women and Children’s Health Center, Tianjin, China
| | - Peng Wang
- Project Office, Tianjin Women and Children’s Health Center, Tianjin, China
| | - Hui Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China
| | - Zhongze Fang
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Tianjin Medical University, Tianjin, China
| | - Zhijie Yu
- Population Cancer Research Program and Department of Pediatrics, Dalhousie University, Halifax, NS, Canada
| | - Gang Hu
- Chronic Disease Epidemiology Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA, United States
| | - Junhong Leng
- Project Office, Tianjin Women and Children’s Health Center, Tianjin, China
| | - Xilin Yang
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin Medical University School of Public Health, Tianjin, China
- Tianjin Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin Medical University School of Public Health, Tianjin, China
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7
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Sahu BS, Razzoli M, McGonigle S, Pallais JP, Nguyen ME, Sadahiro M, Jiang C, Lin WJ, Kelley KA, Rodriguez P, Mansk R, Cero C, Caviola G, Palanza P, Rao L, Beetch M, Alejandro E, Sham YY, Frontini A, Salton SR, Bartolomucci A. Targeted and selective knockout of the TLQP-21 neuropeptide unmasks its unique role in energy homeostasis. Mol Metab 2023; 76:101781. [PMID: 37482186 PMCID: PMC10400922 DOI: 10.1016/j.molmet.2023.101781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/26/2023] [Accepted: 07/18/2023] [Indexed: 07/25/2023] Open
Abstract
OBJECTIVE Pro-peptide precursors are processed into biologically active peptide hormones or neurotransmitters, each playing an essential role in physiology and disease. Genetic loss of function of a pro-peptide precursor results in the simultaneous ablation of all biologically-active peptides within that precursor, often leading to a composite phenotype that can be difficult to align with the loss of specific peptide components. Due to this biological constraint and technical limitations, mice carrying the selective ablation of individual peptides encoded by pro-peptide precursor genes, while leaving the other peptides unaffected, have remained largely unaddressed. METHODS We developed and characterized a mouse model carrying the selective knockout of the TLQP-21 neuropeptide (ΔTLQP-21) encoded by the Vgf gene. To achieve this goal, we used a knowledge-based approach by mutating a codon in the Vgf sequence leading to the substitution of the C-terminal Arginine of TLQP-21, which is the pharmacophore as well as an essential cleavage site from its precursor, into Alanine (R21→A). RESULTS We provide several independent validations of this mouse, including a novel in-gel digestion targeted mass spectrometry identification of the unnatural mutant sequence, exclusive to the mutant mouse. ΔTLQP-21 mice do not manifest gross behavioral and metabolic abnormalities and reproduce well, yet they have a unique metabolic phenotype characterized by an environmental temperature-dependent resistance to diet-induced obesity and activation of the brown adipose tissue. CONCLUSIONS The ΔTLQP-21 mouse line can be a valuable resource to conduct mechanistic studies on the necessary role of TLQP-21 in physiology and disease, while also serving as a platform to test the specificity of novel antibodies or immunoassays directed at TLQP-21. Our approach also has far-reaching implications by informing the development of knowledge-based genetic engineering approaches to generate selective loss of function of other peptides encoded by pro-hormones genes, leaving all other peptides within the pro-protein precursor intact and unmodified.
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Affiliation(s)
- Bhavani S Sahu
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Maria Razzoli
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Seth McGonigle
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Jean Pierre Pallais
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Megin E Nguyen
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Masato Sadahiro
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Cheng Jiang
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Wei-Jye Lin
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Kevin A Kelley
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Pedro Rodriguez
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Rachel Mansk
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Cheryl Cero
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Giada Caviola
- Department of Medicine and Surgery, University of Parma, 43120, Parma, Italy
| | - Paola Palanza
- Department of Medicine and Surgery, University of Parma, 43120, Parma, Italy
| | - Loredana Rao
- Department of Life and Environmental Sciences, Universita' Politecnica delle Marche, Ancona, 60131, Italy
| | - Megan Beetch
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Emilyn Alejandro
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Yuk Y Sham
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Andrea Frontini
- Department of Life and Environmental Sciences, Universita' Politecnica delle Marche, Ancona, 60131, Italy
| | - Stephen R Salton
- Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Alessandro Bartolomucci
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, 55455, USA.
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8
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Wang L, Gao P, Li C, Liu Q, Yao Z, Li Y, Zhang X, Sun J, Simintiras C, Welborn M, McMillin K, Oprescu S, Kuang S, Fu X. A single-cell atlas of bovine skeletal muscle reveals mechanisms regulating intramuscular adipogenesis and fibrogenesis. J Cachexia Sarcopenia Muscle 2023; 14:2152-2167. [PMID: 37439037 PMCID: PMC10570087 DOI: 10.1002/jcsm.13292] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 04/23/2023] [Accepted: 05/22/2023] [Indexed: 07/14/2023] Open
Abstract
BACKGROUND Intramuscular fat (IMF) and intramuscular connective tissue (IMC) are often seen in human myopathies and are central to beef quality. The mechanisms regulating their accumulation remain poorly understood. Here, we explored the possibility of using beef cattle as a novel model for mechanistic studies of intramuscular adipogenesis and fibrogenesis. METHODS Skeletal muscle single-cell RNAseq was performed on three cattle breeds, including Wagyu (high IMF), Brahman (abundant IMC but scarce IMF), and Wagyu/Brahman cross. Sophisticated bioinformatics analyses, including clustering analysis, gene set enrichment analyses, gene regulatory network construction, RNA velocity, pseudotime analysis, and cell-cell communication analysis, were performed to elucidate heterogeneities and differentiation processes of individual cell types and differences between cattle breeds. Experiments were conducted to validate the function and specificity of identified key regulatory and marker genes. Integrated analysis with multiple published human and non-human primate datasets was performed to identify common mechanisms. RESULTS A total of 32 708 cells and 21 clusters were identified, including fibro/adipogenic progenitor (FAP) and other resident and infiltrating cell types. We identified an endomysial adipogenic FAP subpopulation enriched for COL4A1 and CFD (log2FC = 3.19 and 1.92, respectively; P < 0.0001) and a perimysial fibrogenic FAP subpopulation enriched for COL1A1 and POSTN (log2FC = 1.83 and 0.87, respectively; P < 0.0001), both of which were likely derived from an unspecified subpopulation. Further analysis revealed more progressed adipogenic programming of Wagyu FAPs and more advanced fibrogenic programming of Brahman FAPs. Mechanistically, NAB2 drives CFD expression, which in turn promotes adipogenesis. CFD expression in FAPs of young cattle before the onset of intramuscular adipogenesis was predictive of IMF contents in adulthood (R2 = 0.885, P < 0.01). Similar adipogenic and fibrogenic FAPs were identified in humans and monkeys. In aged humans with metabolic syndrome and progressed Duchenne muscular dystrophy (DMD) patients, increased CFD expression was observed (P < 0.05 and P < 0.0001, respectively), which was positively correlated with adipogenic marker expression, including ADIPOQ (R2 = 0.303, P < 0.01; and R2 = 0.348, P < 0.01, respectively). The specificity of Postn/POSTN as a fibrogenic FAP marker was validated using a lineage-tracing mouse line. POSTN expression was elevated in Brahman FAPs (P < 0.0001) and DMD patients (P < 0.01) but not in aged humans. Strong interactions between vascular cells and FAPs were also identified. CONCLUSIONS Our study demonstrates the feasibility of beef cattle as a model for studying IMF and IMC. We illustrate the FAP programming during intramuscular adipogenesis and fibrogenesis and reveal the reliability of CFD as a predictor and biomarker of IMF accumulation in cattle and humans.
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Affiliation(s)
- Leshan Wang
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Peidong Gao
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Chaoyang Li
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Qianglin Liu
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Zeyang Yao
- Department of Computer ScienceOld Dominion UniversityNorfolkVAUSA
| | - Yuxia Li
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Xujia Zhang
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | - Jiangwen Sun
- Department of Computer ScienceOld Dominion UniversityNorfolkVAUSA
| | | | - Matthew Welborn
- School of Veterinary MedicineLouisiana State UniversityBaton RougeLAUSA
| | - Kenneth McMillin
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
| | | | - Shihuan Kuang
- Department of Animal SciencesPurdue UniversityWest LafayetteINUSA
| | - Xing Fu
- School of Animal ScienceLouisiana State University Agricultural CenterBaton RougeLAUSA
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9
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Kiernan K, Nichols AG, Alwarawrah Y, MacIver NJ. Effects of T cell leptin signaling on systemic glucose tolerance and T cell responses in obesity. PLoS One 2023; 18:e0286470. [PMID: 37276236 PMCID: PMC10241364 DOI: 10.1371/journal.pone.0286470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/16/2023] [Indexed: 06/07/2023] Open
Abstract
BACKGROUND/OBJECTIVES Leptin is an adipokine secreted in proportion to adipocyte mass and is therefore increased in obesity. Leptin signaling has been shown to directly promote inflammatory T helper 1 (Th1) and T helper 17 (Th17) cell number and function. Since T cells have a critical role in driving inflammation and systemic glucose intolerance in obesity, we sought to determine the role of leptin signaling in this context. METHODS Male and female T cell-specific leptin receptor knockout mice and littermate controls were placed on low-fat diet or high-fat diet to induce obesity for 18 weeks. Weight gain, serum glucose levels, systemic glucose tolerance, T cell metabolism, and T cell differentiation and cytokine production were examined. RESULTS In both male and female mice, T cell-specific leptin receptor deficiency did not reverse impaired glucose tolerance in obesity, although it did prevent impaired fasting glucose levels in obese mice compared to littermate controls, in a sex dependent manner. Despite these minimal effects on systemic metabolism, T cell-specific leptin signaling was required for changes in T cell metabolism, differentiation, and cytokine production observed in mice fed high-fat diet compared to low-fat diet. Specifically, we observed increased T cell oxidative metabolism, increased CD4+ T cell IFN-γ expression, and increased proportion of T regulatory (Treg) cells in control mice fed high-fat diet compared to low-fat diet, which were not observed in the leptin receptor conditional knockout mice, suggesting that leptin receptor signaling is required for some of the inflammatory changes observed in T cells in obesity. CONCLUSIONS T cell-specific deficiency of leptin signaling alters T cell metabolism and function in obesity but has minimal effects on obesity-associated systemic metabolism. These results suggest a redundancy in cytokine receptor signaling pathways in response to inflammatory signals in obesity.
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Affiliation(s)
- Kaitlin Kiernan
- Department of Immunology, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Amanda G. Nichols
- Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
| | - Yazan Alwarawrah
- Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
| | - Nancie J. MacIver
- Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
- Department of Nutrition, University of North Carolina School of Medicine and Gillings School of Global Public Health, Chapel Hill, North Carolina, United States of America
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10
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Sarkar MS, Mia MM, Amin MA, Hossain MS, Islam MZ. Bioinformatics and network biology approach to identifying type 2 diabetes genes and pathways that influence the progression of breast cancer. Heliyon 2023; 9:e16151. [PMID: 37234659 PMCID: PMC10205526 DOI: 10.1016/j.heliyon.2023.e16151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 04/28/2023] [Accepted: 05/07/2023] [Indexed: 05/28/2023] Open
Abstract
Breast cancer is the second most prevalent malignancy affecting women. Postmenopausal women breast tumor is one of the top causes of death in women, accounting for 23% of cancer cases. Type 2 diabetes, a worldwide pandemic, has been connected to a heightened risk of several malignancies, although its association with breast cancer is still uncertain. In comparison to non-diabetic women, women with T2DM had a 23% elevated likelihood of developing breast cancer. It is difficult to determine causative or genetic susceptibility that connect T2DM and breast cancer. We created a large-scale network-based quantitative approach employing unbiased methods to discover abnormally amplified genes in both T2DM and breast cancer, to solve these issues. We performed transcriptome analysis to uncover identical genetic biomarkers and pathways to clarify the connection between T2DM and breast cancer patients. In this study, two RNA-seq datasets (GSE103001 and GSE86468) from the Gene Expression Omnibus (GEO) are used to identify mutually differentially expressed genes (DEGs) for breast cancer and T2DM, as well as common pathways and prospective medicines. Firstly, 45 shared genes (30 upregulated and 15 downregulated) between T2D and breast cancer were detected. We employed gene ontology and pathway enrichment to characterize prevalent DEGs' molecular processes and signal transduction pathways and observed that T2DM has certain connections to the progression of breast cancer. Using several computational and statistical approaches, we created a protein-protein interactions (PPI) network and revealed hub genes. These hub genes can be potential biomarkers, which may also lead to new therapeutic strategies for investigated diseases. We conducted TF-gene interactions, gene-microRNA interactions, protein-drug interactions, and gene-disease associations to find potential connections between T2DM and breast cancer pathologies. We assume that the potential drugs that emerged from this study could be useful therapeutic values. Researchers, doctors, biotechnologists, and many others may benefit from this research.
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Affiliation(s)
- Md Sumon Sarkar
- Department of Pharmacy, Islamic University, Kushtia-7003, Bangladesh
| | - Md Misor Mia
- Department of Pharmacy, Islamic University, Kushtia-7003, Bangladesh
| | - Md Al Amin
- Department of Computer Science & Engineering, Prime University, Dhaka-1216, Bangladesh
| | - Md Sojib Hossain
- Department of Mathematics, Govt. Bangla College, Dhaka-1216, Bangladesh
| | - Md Zahidul Islam
- Department of Information & Communication Technology, Islamic University, Kushtia-7003, Bangladesh
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11
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Li X, Ren Y, Chang K, Wu W, Griffiths HR, Lu S, Gao D. Adipose tissue macrophages as potential targets for obesity and metabolic diseases. Front Immunol 2023; 14:1153915. [PMID: 37153549 PMCID: PMC10154623 DOI: 10.3389/fimmu.2023.1153915] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 04/04/2023] [Indexed: 05/09/2023] Open
Abstract
Macrophage infiltration into adipose tissue is a key pathological factor inducing adipose tissue dysfunction and contributing to obesity-induced inflammation and metabolic disorders. In this review, we aim to present the most recent research on macrophage heterogeneity in adipose tissue, with a focus on the molecular targets applied to macrophages as potential therapeutics for metabolic diseases. We begin by discussing the recruitment of macrophages and their roles in adipose tissue. While resident adipose tissue macrophages display an anti-inflammatory phenotype and promote the development of metabolically favorable beige adipose tissue, an increase in pro-inflammatory macrophages in adipose tissue has negative effects on adipose tissue function, including inhibition of adipogenesis, promotion of inflammation, insulin resistance, and fibrosis. Then, we presented the identities of the newly discovered adipose tissue macrophage subtypes (e.g. metabolically activated macrophages, CD9+ macrophages, lipid-associated macrophages, DARC+ macrophages, and MFehi macrophages), the majority of which are located in crown-like structures within adipose tissue during obesity. Finally, we discussed macrophage-targeting strategies to ameliorate obesity-related inflammation and metabolic abnormalities, with a focus on transcriptional factors such as PPARγ, KLF4, NFATc3, and HoxA5, which promote macrophage anti-inflammatory M2 polarization, as well as TLR4/NF-κB-mediated inflammatory pathways that activate pro-inflammatory M1 macrophages. In addition, a number of intracellular metabolic pathways closely associated with glucose metabolism, oxidative stress, nutrient sensing, and circadian clock regulation were examined. Understanding the complexities of macrophage plasticity and functionality may open up new avenues for the development of macrophage-based treatments for obesity and other metabolic diseases.
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Affiliation(s)
- Xirong Li
- Institute of Molecular and Translational Medicine, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Yakun Ren
- Institute of Molecular and Translational Medicine, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Kewei Chang
- Institute of Molecular and Translational Medicine, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases (Xi’an Jiaotong University), Ministry of Education, Xi’an, China
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Center, Xi’an, China
| | - Wenlong Wu
- Institute of Molecular and Translational Medicine, 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
| | - Shemin Lu
- Institute of Molecular and Translational Medicine, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases (Xi’an Jiaotong University), Ministry of Education, Xi’an, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Dan Gao
- Institute of Molecular and Translational Medicine, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
- Key Laboratory of Environment and Genes Related to Diseases (Xi’an Jiaotong University), Ministry of Education, Xi’an, China
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Center, Xi’an, China
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12
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Sahu BS, Razzoli M, McGonigle S, Pallais JP, Nguyen ME, Sadahiro M, Jiang C, Lin WJ, Kelley KA, Rodriguez P, Mansk R, Cero C, Caviola G, Palanza P, Rao L, Beetch M, Alejandro E, Sham YY, Frontini A, Salton SR, Bartolomucci A. Targeted and selective knockout of the TLQP-21 neuropeptide unmasks its unique role in energy homeostasis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.23.532619. [PMID: 36993202 PMCID: PMC10055429 DOI: 10.1101/2023.03.23.532619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Pro-peptide precursors are processed into biologically active peptide hormones or neurotransmitters, each playing an essential role in physiology and disease. Genetic loss of function of a pro-peptide precursor results in the simultaneous ablation of all biologically-active peptides within that precursor, often leading to a composite phenotype that can be difficult to align with the loss of specific peptide components. Due to this biological constraint and technical limitations, mice carrying the selective ablation of individual peptides encoded by pro-peptide precursor genes, while leaving the other peptides unaffected, have remained largely unaddressed. Here, we developed and characterized a mouse model carrying the selective knockout of the TLQP-21 neuropeptide (ΔTLQP-21) encoded by the Vgf gene. To achieve this goal, we used a knowledge-based approach by mutating a codon in the Vgf sequence leading to the substitution of the C-terminal Arginine of TLQP-21, which is the pharmacophore as well as an essential cleavage site from its precursor, into Alanine (R 21 →A). We provide several independent validations of this mouse, including a novel in-gel digestion targeted mass spectrometry identification of the unnatural mutant sequence, exclusive to the mutant mouse. ΔTLQP-21 mice do not manifest gross behavioral and metabolic abnormalities and reproduce well, yet they have a unique metabolic phenotype characterized by a temperature-dependent resistance to diet-induced obesity and activation of the brown adipose tissue.
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13
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Kong LR, Chen XH, Sun Q, Zhang KY, Xu L, Ding L, Zhou YP, Zhang ZB, Lin JR, Gao PJ. Loss of C3a and C5a receptors promotes adipocyte browning and attenuates diet-induced obesity via activating inosine/A2aR pathway. Cell Rep 2023; 42:112078. [PMID: 36735535 DOI: 10.1016/j.celrep.2023.112078] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/29/2022] [Accepted: 01/23/2023] [Indexed: 02/04/2023] Open
Abstract
Complement activation is thought to underline the pathologic progression of obesity-related metabolic disorders; however, its role in adaptive thermogenesis has scarcely been explored. Here, we identify complement C3a receptor (C3aR) and C5a receptor (C5aR) as critical switches to control adipocyte browning and energy balance in male mice. Loss of C3aR and C5aR in combination, more than individually, increases cold-induced adipocyte browning and attenuates diet-induced obesity in male mice. Mechanistically, loss of C3aR and C5aR increases regulatory T cell (Treg) accumulation in the subcutaneous white adipose tissue during cold exposure or high-fat diet. Activated Tregs produce adenosine, which is converted to inosine by adipocyte-derived adenosine deaminases. Inosine promotes adipocyte browning in a manner dependent on activating adenosine A2a receptor. These data reveal a regulatory mechanism of complement in controlling adaptive thermogenesis and suggest that targeting the C3aR/C5aR pathways may represent a therapeutic strategy in treating obesity-related metabolic diseases.
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Affiliation(s)
- Ling-Ran Kong
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Shanghai Institute of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiao-Hui Chen
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Shanghai Institute of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Qing Sun
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Shanghai Institute of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Kai-Yuan Zhang
- Department of Traditional Chinese Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lian Xu
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Shanghai Institute of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Liliqiang Ding
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Shanghai Institute of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yan-Ping Zhou
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Shanghai Institute of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ze-Bei Zhang
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Shanghai Institute of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jing-Rong Lin
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Shanghai Institute of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ping-Jin Gao
- State Key Laboratory of Medical Genomics, Shanghai Key Laboratory of Hypertension, Shanghai Institute of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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14
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Yao J, Liang J, Li H. Screening for key genes in circadian regulation in advanced atherosclerosis: A bioinformatic analysis. Front Cardiovasc Med 2023; 9:990757. [PMID: 36712250 PMCID: PMC9878187 DOI: 10.3389/fcvm.2022.990757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Accepted: 12/28/2022] [Indexed: 01/15/2023] Open
Abstract
Background Atherosclerosis (AS) is the most important cardiovascular disease threatening human health, leading to adverse events such as myocardial infarction and stroke. The research on the pathogenesis and causes of AS is being improved step by step, and many factors are associated with AS. However, the relationship between circadian regulation and the pathogenesis of AS is still unclear. Our study identified 2 key genes of circadian regulation in AS by bioinformatics analysis, which provides new perspectives to understand the relationship between circadian rhythm and AS. Methods We downloaded samples of early and advanced AS from public databases, screened key genes by weighted gene co-expression network analysis (WGCNA) and Lasso, calculated the immune cell content of the samples using "CIBERSORT," and analyzed the relationship between key genes and immune cells. Results We obtained the most relevant core modules for advanced AS and analyzed the functions of these modules. Two circadian rhythm-related genes were obtained, which influence the immune infiltration of this late AS. ROC curves demonstrated the efficacy of key genes to differentiate between early and advanced AS. Conclusion We identified 2 genes most associated with circadian rhythms in advanced AS, whose association with AS has not been elucidated and may become the next therapeutic target.
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Affiliation(s)
- Jiali Yao
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jingyan Liang
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China,Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou University, Yangzhou, Jiangsu, China
| | - Hongliang Li
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu, China,Jiangsu Key Laboratory of Experimental & Translational Non-Coding RNA Research, Yangzhou University, Yangzhou, Jiangsu, China,*Correspondence: Hongliang Li,
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15
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Smith-Jackson K, Harrison RA. Alternative pathway activation in pregnancy, a measured amount "complements" a successful pregnancy, too much results in adverse events. Immunol Rev 2023; 313:298-319. [PMID: 36377667 PMCID: PMC10100418 DOI: 10.1111/imr.13169] [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: 11/16/2022]
Abstract
During pregnancy, the maternal host must adapt in order to enable growth of the fetus. These changes affect all organ systems and are designed both to protect the fetus and to minimize risk to the mother. One of the most prominent adaptations involves the immune system. The semi-allogenic fetoplacental unit has non-self components and must be protected against attack from the host. This requires both attenuation of adaptive immunity and protection from innate immune defense mechanisms. One of the key innate immune players is complement, and it is important that the fetoplacental unit is not identified as non-self and subjected to complement attack. Adaptation of the complement response must, however, be managed in such a way that maternal protection against infection is not compromised. As the complement system also plays a significant facilitating role in many of the stages of a normal pregnancy, it is also important that any necessary adaptation to accommodate the semi-allogenic aspects of the fetoplacental unit does not compromise this. In this review, both the physiological role of the alternative pathway of complement in facilitating a normal pregnancy, and its detrimental participation in pregnancy-specific disorders, are discussed.
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Affiliation(s)
- Kate Smith-Jackson
- Complement Therapeutics Research Group, Translational and Clinical Research Institute, Faculty of Medical Science, Newcastle University, Newcastle-upon-Tyne, UK.,The National Renal Complement Therapeutics Centre (NRCTC), Newcastle-upon-Tyne Hospitals NHS Foundation Trust, Newcastle-upon-Tyne, UK
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16
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Zhao J, Wu Y, Lu P, Wu X, Han J, Shi Y, Liu Y, Cheng Y, Gao L, Zhao J, Wang Z, Fan X. Association of complement components with the risk and severity of NAFLD: A systematic review and meta-analysis. Front Immunol 2022; 13:1054159. [PMID: 36569882 PMCID: PMC9782972 DOI: 10.3389/fimmu.2022.1054159] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 11/18/2022] [Indexed: 12/14/2022] Open
Abstract
Background It is generally believed that complement system is strongly associated with the risk of nonalcoholic fatty liver disease (NAFLD). However, complement system contains a variety of complement components, and the relationship between complement components and the risk and severity of NAFLD is inconsistent. The aim of this meta-analysis was to evaluate the association of complement components with the risk and severity of NAFLD. Methods We searched PubMed, Embase, Cochrane Library, Google Scholar, Scopus, and ZhiWang Chinese databases from inception to May 2022 for observational studies reporting the risk of NAFLD with complement components. Random-effects meta-analysis was used to obtain pooled estimates of the effect due to heterogeneity. Results We identified 18 studies with a total of 18560 included subjects. According to recent studies, levels of complement component 3 (C3) (mean difference (MD): 0.43, 95% confidence interval (CI) 0.26-0.60), complement component 4 (C4) (MD: 0.04, 95% CI 0.02-0.07), complement component 5(C5) (MD: 34.03, 95% CI 30.80-37.27), complement factor B (CFB) (MD: 0.22, 95% CI 0.13-0.31) and acylation stimulating protein (ASP) (standard mean difference (SMD): 5.17, 95% CI 2.57-7.77) in patients with NAFLD were significantly higher than those in the control group. However, no statistical significance was obtained in complement factor D (CFD) levels between NAFLD and non-NAFLD (MD=156.51, 95% CI -59.38-372.40). Moreover, the levels of C3, C5, CFB, and ASP in patients with moderate and severe NAFLD were significantly higher than those in patients with mild NAFLD. Except for C4 and CFD, the included studies did not explore the changes in the severity of NAFLD according to the concentration of C4 and CFD. Conclusions This meta-analysis demonstrates that an increase in complement components including C3, C5, CFB, and ASP is associated with an increased risk and severity of NAFLD, indicating that they may be good biomarkers and targets for the diagnosis and treatment of NAFLD. Systematic review registration PROSPERO [https://www.crd.york.ac.uk/PROSPERO/], identifier CRD42022348650.
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Affiliation(s)
- Jianbo Zhao
- Clinical Medical College, Ningxia Medical University, Yinchuan, Ningxia, China,Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China,Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, Shandong, China,Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China,Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, Shandong, China,Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Yafei Wu
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China,Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, Shandong, China,Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China,Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, Shandong, China,Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Peng Lu
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China,Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, Shandong, China,Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China,Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, Shandong, China,Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Xiaoqin Wu
- Department of Inflammation and Immunity, Cleveland Clinic, OH, Cleveland, United States
| | - Junming Han
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China,Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, Shandong, China,Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China,Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, Shandong, China,Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Yingzhou Shi
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China,Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, Shandong, China,Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China,Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, Shandong, China,Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Yue Liu
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China,Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, Shandong, China,Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China,Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, Shandong, China,Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Yiping Cheng
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China,Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, Shandong, China,Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China,Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, Shandong, China,Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Ling Gao
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China,Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, Shandong, China,Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China,Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, Shandong, China,Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong, China
| | - Jiajun Zhao
- Clinical Medical College, Ningxia Medical University, Yinchuan, Ningxia, China,Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China,Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, Shandong, China,Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China,Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, Shandong, China,Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong, China,*Correspondence: Jiajun Zhao, ; Zhen Wang, ; Xiude Fan,
| | - Zhen Wang
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China,Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, Shandong, China,Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China,Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, Shandong, China,Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong, China,*Correspondence: Jiajun Zhao, ; Zhen Wang, ; Xiude Fan,
| | - Xiude Fan
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China,Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, Shandong, China,Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, Shandong, China,Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, Shandong, China,Shandong Engineering Research Center of Stem Cell and Gene Therapy for Endocrine and Metabolic Diseases, Jinan, Shandong, China,*Correspondence: Jiajun Zhao, ; Zhen Wang, ; Xiude Fan,
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17
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Guo Z, Fan X, Yao J, Tomlinson S, Yuan G, He S. The role of complement in nonalcoholic fatty liver disease. Front Immunol 2022; 13:1017467. [PMID: 36248852 PMCID: PMC9562907 DOI: 10.3389/fimmu.2022.1017467] [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: 08/12/2022] [Accepted: 09/13/2022] [Indexed: 11/14/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) has become a leading cause of chronic liver diseases globally. NAFLD includes a range of hepatic manifestations, starting with liver steatosis and potentially evolving towards nonalcoholic steatohepatitis, cirrhosis or even hepatocellular carcinoma. Although the pathogenesis of NAFLD is incompletely understood, insulin resistance and lipid metabolism disorder are implicated. The complement system is an essential part of the immune system, but it is also involved in lipid metabolism. In particular, activation of the alternative complement pathway and the production of complement activation products such as C3a, C3adesArg (acylation stimulating protein or ASP) and C5a, are strongly associated with insulin resistance, lipid metabolism disorder, and hepatic inflammation. In this review, we briefly summarize research on the role of the complement system in NAFLD, aiming to provide a basis for the development of novel therapeutic strategies for NAFLD.
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Affiliation(s)
- Zhenya Guo
- Division of Hepatobiliary Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Nanning, China
- Guangxi Key Laboratory of Immunology and Metabolism for Liver Diseases, Guangxi Medical University, Nanning, China
| | - Xiude Fan
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Jianni Yao
- Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Nanning, China
- Guangxi Key Laboratory of Immunology and Metabolism for Liver Diseases, Guangxi Medical University, Nanning, China
| | - Stephen Tomlinson
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, United States
| | - Guandou Yuan
- Division of Hepatobiliary Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Nanning, China
- Guangxi Key Laboratory of Immunology and Metabolism for Liver Diseases, Guangxi Medical University, Nanning, China
| | - Songqing He
- Division of Hepatobiliary Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Nanning, China
- Guangxi Key Laboratory of Immunology and Metabolism for Liver Diseases, Guangxi Medical University, Nanning, China
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18
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Macrophages, Low-Grade Inflammation, Insulin Resistance and Hyperinsulinemia: A Mutual Ambiguous Relationship in the Development of Metabolic Diseases. J Clin Med 2022; 11:jcm11154358. [PMID: 35955975 PMCID: PMC9369133 DOI: 10.3390/jcm11154358] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/21/2022] [Accepted: 07/22/2022] [Indexed: 02/06/2023] Open
Abstract
Metabolic derangement with poor glycemic control accompanying overweight and obesity is associated with chronic low-grade inflammation and hyperinsulinemia. Macrophages, which present a very heterogeneous population of cells, play a key role in the maintenance of normal tissue homeostasis, but functional alterations in the resident macrophage pool as well as newly recruited monocyte-derived macrophages are important drivers in the development of low-grade inflammation. While metabolic dysfunction, insulin resistance and tissue damage may trigger or advance pro-inflammatory responses in macrophages, the inflammation itself contributes to the development of insulin resistance and the resulting hyperinsulinemia. Macrophages express insulin receptors whose downstream signaling networks share a number of knots with the signaling pathways of pattern recognition and cytokine receptors, which shape macrophage polarity. The shared knots allow insulin to enhance or attenuate both pro-inflammatory and anti-inflammatory macrophage responses. This supposedly physiological function may be impaired by hyperinsulinemia or insulin resistance in macrophages. This review discusses the mutual ambiguous relationship of low-grade inflammation, insulin resistance, hyperinsulinemia and the insulin-dependent modulation of macrophage activity with a focus on adipose tissue and liver.
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Xu Z, Tao L, Su H. The Complement System in Metabolic-Associated Kidney Diseases. Front Immunol 2022; 13:902063. [PMID: 35924242 PMCID: PMC9339597 DOI: 10.3389/fimmu.2022.902063] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 06/20/2022] [Indexed: 11/17/2022] Open
Abstract
Metabolic syndrome (MS) is a group of clinical abnormalities characterized by central or abdominal obesity, hypertension, hyperuricemia, and metabolic disorders of glucose or lipid. Currently, the prevalence of MS is estimated about 25% in general population and is progressively increasing, which has become a challenging public health burden. Long-term metabolic disorders can activate the immune system and trigger a low-grade chronic inflammation named “metaflammation.” As an important organ involved in metabolism, the kidney is inevitably attacked by immunity disequilibrium and “metaflammation.” Recently, accumulating studies have suggested that the complement system, the most important and fundamental component of innate immune responses, is actively involved in the development of metabolic kidney diseases. In this review, we updated and summarized the different pathways through which the complement system is activated in a series of metabolic disturbances and the mechanisms on how complement mediate immune cell activation and infiltration, renal parenchymal cell damage, and the deterioration of renal function provide potential new biomarkers and therapeutic options for metabolic kidney diseases.
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Mogilenko DA, Danko K, Larionova EE, Shavva VS, Kudriavtsev IV, Nekrasova EV, Burnusuz AV, Gorbunov NP, Trofimov AV, Zhakhov AV, Ivanov IA, Orlov SV. Differentiation of human macrophages with anaphylatoxin C3a impairs alternative M2 polarization and decreases lipopolysaccharide‐induced cytokine secretion. Immunol Cell Biol 2022; 100:186-204. [DOI: 10.1111/imcb.12534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 01/06/2022] [Accepted: 02/07/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Denis A Mogilenko
- Department of Biochemistry Institute of Experimental Medicine St. Petersburg Russia
- Department of Embryology St. Petersburg State University St. Petersburg Russia
| | - Katerina Danko
- Department of Biochemistry Institute of Experimental Medicine St. Petersburg Russia
- Department of Cytology and Histology St. Petersburg State University St. Petersburg Russia
| | | | - Vladimir S Shavva
- Department of Biochemistry Institute of Experimental Medicine St. Petersburg Russia
| | - Igor V Kudriavtsev
- Department of Cytology and Histology St. Petersburg State University St. Petersburg Russia
- Department of Immunology Institute of Experimental Medicine St. Petersburg Russia
| | | | - Alexandra V Burnusuz
- Department of Biochemistry Institute of Experimental Medicine St. Petersburg Russia
- Department of Cytology and Histology St. Petersburg State University St. Petersburg Russia
- Department of Immunology Institute of Experimental Medicine St. Petersburg Russia
| | - Nikolay P Gorbunov
- The Research Institute of Highly Pure Biopreparations St. Petersburg Russia
| | | | | | | | - Sergey V Orlov
- Department of Biochemistry Institute of Experimental Medicine St. Petersburg Russia
- Department of Embryology St. Petersburg State University St. Petersburg Russia
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21
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Milek M, Moulla Y, Kern M, Stroh C, Dietrich A, Schön MR, Gärtner D, Lohmann T, Dressler M, Kovacs P, Stumvoll M, Blüher M, Guiu-Jurado E. Adipsin Serum Concentrations and Adipose Tissue Expression in People with Obesity and Type 2 Diabetes. Int J Mol Sci 2022; 23:ijms23042222. [PMID: 35216336 PMCID: PMC8878597 DOI: 10.3390/ijms23042222] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/02/2022] [Accepted: 02/07/2022] [Indexed: 02/01/2023] Open
Abstract
(1) Adipsin is an adipokine that may link increased fat mass and adipose tissue dysfunction to obesity-related cardiometabolic diseases. Here, we investigated whether adipsin serum concentrations and adipose tissue (AT) adipsin mRNA expression are related to parameters of AT function, obesity and type 2 diabetes (T2D). (2) Methods: A cohort of 637 individuals with a wide range of age and body weight (Age: 18–85 years; BMI: 19–70 kg/m2) with (n = 237) or without (n = 400) T2D was analyzed for serum adipsin concentrations by ELISA and visceral (VAT) and subcutaneous (SAT) adipsin mRNA expression by RT-PCR. (3) Results: Adipsin serum concentrations were significantly higher in patients with T2D compared to normoglycemic individuals. We found significant positive univariate relationships of adipsin serum concentrations with age (r = 0.282, p < 0.001), body weight (r = 0.264, p < 0.001), fasting plasma glucose (r = 0.136, p = 0.006) and leptin serum concentrations (r = 0.362, p < 0.001). Neither VAT nor SAT adipsin mRNA expression correlated with adipsin serum concentrations after adjusting for age, sex and BMI. Independent of T2D status, we found significantly higher adipsin expression in SAT compared to VAT (4) Conclusions: Our data suggest that adipsin serum concentrations are strongly related to obesity and age. However, neither circulating adipsin nor adipsin AT expression reflects parameters of impaired glucose or lipid metabolism in patients with obesity with or without T2D.
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Affiliation(s)
- Margarete Milek
- Medical Department III—Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04103 Leipzig, Germany; (M.M.); (P.K.); (M.S.)
| | - Yusef Moulla
- Clinic for Visceral, Transplantation and Thorax and Vascular Surgery, University Hospital Leipzig, 04103 Leipzig, Germany; (Y.M.); (A.D.)
| | - Matthias Kern
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital Leipzig, 04103 Leipzig, Germany;
| | - Christine Stroh
- Department of General, Abdominal and Pediatric Surgery, Municipal Hospital, 07548 Gera, Germany;
| | - Arne Dietrich
- Clinic for Visceral, Transplantation and Thorax and Vascular Surgery, University Hospital Leipzig, 04103 Leipzig, Germany; (Y.M.); (A.D.)
| | - Michael R Schön
- Städtisches Klinikum Karlsruhe, Clinic of Visceral Surgery, 76133 Karlsruhe, Germany; (M.R.S.); (D.G.)
| | - Daniel Gärtner
- Städtisches Klinikum Karlsruhe, Clinic of Visceral Surgery, 76133 Karlsruhe, Germany; (M.R.S.); (D.G.)
| | - Tobias Lohmann
- Municipal Clinic Dresden-Neustadt, 01129 Dresden, Germany; (T.L.); (M.D.)
| | - Miriam Dressler
- Municipal Clinic Dresden-Neustadt, 01129 Dresden, Germany; (T.L.); (M.D.)
| | - Peter Kovacs
- Medical Department III—Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04103 Leipzig, Germany; (M.M.); (P.K.); (M.S.)
| | - Michael Stumvoll
- Medical Department III—Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04103 Leipzig, Germany; (M.M.); (P.K.); (M.S.)
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital Leipzig, 04103 Leipzig, Germany;
| | - Matthias Blüher
- Medical Department III—Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04103 Leipzig, Germany; (M.M.); (P.K.); (M.S.)
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital Leipzig, 04103 Leipzig, Germany;
- Correspondence: (M.B.); (E.G.-J.); Tel.: +49-341-972-2901 (M.B.); +49-341-971-5895 (E.G.-J.)
| | - Esther Guiu-Jurado
- Medical Department III—Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04103 Leipzig, Germany; (M.M.); (P.K.); (M.S.)
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital Leipzig, 04103 Leipzig, Germany;
- Deutsches Zentrum für Diabetesforschung e.V., 85764 Oberschleißheim, Germany
- Correspondence: (M.B.); (E.G.-J.); Tel.: +49-341-972-2901 (M.B.); +49-341-971-5895 (E.G.-J.)
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22
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Cho BA, Iyengar NM, Zhou XK, Mendieta H, Winston L, Falcone DJ, Landa J, Morrow M, Dannenberg AJ. Increased trunk fat is associated with altered gene expression in breast tissue of normal weight women. NPJ Breast Cancer 2022; 8:15. [PMID: 35087024 PMCID: PMC8795267 DOI: 10.1038/s41523-021-00369-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 11/23/2021] [Indexed: 12/12/2022] Open
Abstract
Increased trunk fat is associated with an elevated risk of breast cancer in normal-weight postmenopausal women. The main objective of this study was to determine whether levels of trunk fat are associated with changes in breast gene expression in normal-weight women. Non-tumorous breast tissue was collected from 32 normal BMI women who underwent mastectomy for breast cancer risk reduction or treatment. Body composition was measured by dual-energy x-ray absorptiometry. High levels of trunk fat were associated with a large number of differentially expressed genes and changes in multiple pathways and processes potentially linked to breast cancer pathogenesis. High levels of trunk fat were also associated with an elevated immune score and increased levels of leptin, CCL2, VEGF-C, IL6, and aromatase. Collectively, these results help to explain why high levels of trunk fat are associated with an increased risk of breast cancer in normal BMI women.
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Affiliation(s)
- Byuri Angela Cho
- Department of Medicine, Weill Cornell Medical College, New York, NY, USA
| | - Neil M Iyengar
- Department of Medicine, Weill Cornell Medical College, New York, NY, USA.
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
| | - Xi Kathy Zhou
- Department of Population Health Sciences, Weill Cornell Medical College, New York, NY, USA
| | - Hillary Mendieta
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Lisle Winston
- Department of Medicine, Weill Cornell Medical College, New York, NY, USA
| | - Domenick J Falcone
- Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York, NY, USA
| | - Jonathan Landa
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Monica Morrow
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
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23
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Reno TA, Tarnus L, Tracy R, Landay AL, Sereti I, Apetrei C, Pandrea I. The Youngbloods. Get Together. Hypercoagulation, Complement, and NET Formation in HIV/SIV Pathogenesis. FRONTIERS IN VIROLOGY 2022. [DOI: 10.3389/fviro.2021.795373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Chronic, systemic T-cell immune activation and inflammation (IA/INFL) have been reported to be associated with disease progression in persons with HIV (PWH) since the inception of the AIDS pandemic. IA/INFL persist in PWH on antiretroviral therapy (ART), despite complete viral suppression and increases their susceptibility to serious non-AIDS events (SNAEs). Increased IA/INFL also occur during pathogenic SIV infections of macaques, while natural hosts of SIVs that control chronic IA/INFL do not progress to AIDS, despite having persistent high viral replication and severe acute CD4+ T-cell loss. Moreover, natural hosts of SIVs do not present with SNAEs. Multiple mechanisms drive HIV-associated IA/INFL, including the virus itself, persistent gut dysfunction, coinfections (CMV, HCV, HBV), proinflammatory lipids, ART toxicity, comorbidities, and behavioral factors (diet, smoking, and alcohol). Other mechanisms could also significantly contribute to IA/INFL during HIV/SIV infection, notably, a hypercoagulable state, characterized by elevated coagulation biomarkers, including D-dimer and tissue factor, which can accurately identify patients at risk for thromboembolic events and death. Coagulation biomarkers strongly correlate with INFL and predict the risk of SNAE-induced end-organ damage. Meanwhile, the complement system is also involved in the pathogenesis of HIV comorbidities. Despite prolonged viral suppression, PWH on ART have high plasma levels of C3a. HIV/SIV infections also trigger neutrophil extracellular traps (NETs) formation that contribute to the elimination of viral particles and infected CD4+ T-cells. However, as SIV infection progresses, generation of NETs can become excessive, fueling IA/INFL, destruction of multiple immune cells subsets, and microthrombotic events, contributing to further tissue damages and SNAEs. Tackling residual IA/INFL has the potential to improve the clinical course of HIV infection. Therefore, therapeutics targeting new pathways that can fuel IA/INFL such as hypercoagulation, complement activation and excessive formation of NETs might be beneficial for PWH and should be considered and evaluated.
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24
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Sahu BS, Nguyen ME, Rodriguez P, Pallais JP, Ghosh V, Razzoli M, Sham YY, Salton SR, Bartolomucci A. The molecular identity of the TLQP-21 peptide receptor. Cell Mol Life Sci 2021; 78:7133-7144. [PMID: 34626205 PMCID: PMC8629782 DOI: 10.1007/s00018-021-03944-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 09/08/2021] [Accepted: 09/15/2021] [Indexed: 11/30/2022]
Abstract
The TLQP-21 neuropeptide has been implicated in functions as diverse as lipolysis, neurodegeneration and metabolism, thus suggesting an important role in several human diseases. Three binding targets have been proposed for TLQP-21: C3aR1, gC1qR and HSPA8. The aim of this review is to critically evaluate the molecular identity of the TLQP-21 receptor and the proposed multi-receptor mechanism of action. Several studies confirm a critical role for C3aR1 in TLQP-21 biological activity and a largely conserved mode of binding, receptor activation and signaling with C3a, its first-identified endogenous ligand. Conversely, data supporting a role of gC1qR and HSPA8 in TLQP-21 activity remain limited, with no signal transduction pathways being described. Overall, C3aR1 is the only receptor for which a necessary and sufficient role in TLQP-21 activity has been confirmed thus far. This conclusion calls into question the validity of a multi-receptor mechanism of action for TLQP-21 and should inform future studies.
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Affiliation(s)
- Bhavani S Sahu
- National Brain Research Centre, NH-8, Manesar, Gurugram, Haryana, 122052, India
| | - Megin E Nguyen
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6th St. SE, Minneapolis, MN, 55455, USA
- Bioinformatics and Computational Biology Program, University of Minnesota, Minneapolis, USA
| | - Pedro Rodriguez
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6th St. SE, Minneapolis, MN, 55455, USA
| | - Jean Pierre Pallais
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6th St. SE, Minneapolis, MN, 55455, USA
| | - Vinayak Ghosh
- National Brain Research Centre, NH-8, Manesar, Gurugram, Haryana, 122052, India
| | - Maria Razzoli
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6th St. SE, Minneapolis, MN, 55455, USA
| | - Yuk Y Sham
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6th St. SE, Minneapolis, MN, 55455, USA
- Bioinformatics and Computational Biology Program, University of Minnesota, Minneapolis, USA
| | - Stephen R Salton
- Departments of Neuroscience and Geriatrics and Palliative Medicine, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY, 10029, USA
| | - Alessandro Bartolomucci
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6th St. SE, Minneapolis, MN, 55455, USA.
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25
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Innate-Immunity Genes in Obesity. J Pers Med 2021; 11:jpm11111201. [PMID: 34834553 PMCID: PMC8623883 DOI: 10.3390/jpm11111201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/10/2021] [Accepted: 11/11/2021] [Indexed: 01/07/2023] Open
Abstract
The main functions of adipose tissue are thought to be storage and mobilization of the body’s energy reserves, active and passive thermoregulation, participation in the spatial organization of internal organs, protection of the body from lipotoxicity, and ectopic lipid deposition. After the discovery of adipokines, the endocrine function was added to the above list, and after the identification of crosstalk between adipocytes and immune cells, an immune function was suggested. Nonetheless, it turned out that the mechanisms underlying mutual regulatory relations of adipocytes, preadipocytes, immune cells, and their microenvironment are complex and redundant at many levels. One possible way to elucidate the picture of adipose-tissue regulation is to determine genetic variants correlating with obesity. In this review, we examine various aspects of adipose-tissue involvement in innate immune responses as well as variants of immune-response genes associated with obesity.
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26
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Cho BA, Iyengar NM, Zhou XK, Morrow M, Giri DD, Verma A, Elemento O, Pollak M, Dannenberg AJ. Blood biomarkers reflect the effects of obesity and inflammation on the human breast transcriptome. Carcinogenesis 2021; 42:1281-1292. [PMID: 34314488 PMCID: PMC8546933 DOI: 10.1093/carcin/bgab066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 07/15/2021] [Accepted: 07/26/2021] [Indexed: 11/14/2022] Open
Abstract
Obesity is a risk factor for the development of post-menopausal breast cancer. Breast white adipose tissue (WAT) inflammation, which is commonly found in women with excess body fat, is also associated with increased breast cancer risk. Both local and systemic effects are probably important for explaining the link between excess body fat, adipose inflammation and breast cancer. The first goal of this cross-sectional study of 196 women was to carry out transcriptome profiling to define the molecular changes that occur in the breast related to excess body fat and WAT inflammation. A second objective was to determine if commonly measured blood biomarkers of risk and prognosis reflect molecular changes in the breast. Breast WAT inflammation was assessed by immunohistochemistry. Bulk RNA-sequencing was carried out to assess gene expression in non-tumorous breast. Obesity and WAT inflammation were associated with a large number of differentially expressed genes and changes in multiple pathways linked to the development and progression of breast cancer. Altered pathways included inflammatory response, complement, KRAS signaling, tumor necrosis factor α signaling via NFkB, interleukin (IL)6-JAK-STAT3 signaling, epithelial mesenchymal transition, angiogenesis, interferon γ response and transforming growth factor (TGF)-β signaling. Increased expression of several drug targets such as aromatase, TGF-β1, IDO-1 and PD-1 were observed. Levels of various blood biomarkers including high sensitivity C-reactive protein, IL6, leptin, adiponectin, triglycerides, high-density lipoprotein cholesterol and insulin were altered and correlated with molecular changes in the breast. Collectively, this study helps to explain both the link between obesity and breast cancer and the utility of blood biomarkers for determining risk and prognosis.
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Affiliation(s)
- Byuri Angela Cho
- Department of Medicine, Weill Cornell Medical College, New York, NY, USA
| | - Neil M Iyengar
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Xi Kathy Zhou
- Department of Population Health Sciences, Weill Cornell Medical College, New York, NY, USA
| | - Monica Morrow
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Dilip D Giri
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Akanksha Verma
- Department of Physiology and Biophysics, Weill Cornell Medical College, New York, NY, USA
| | - Olivier Elemento
- Department of Physiology and Biophysics, Weill Cornell Medical College, New York, NY, USA
- Caryl and Israel Englander Institute for Precision Medicine, Weill Cornell Medical College, New York, NY, USA
| | - Michael Pollak
- Department of Medicine and Oncology, McGill University, Montreal, Quebec, Canada
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27
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Han J, Zhang X. Complement Component C3: A Novel Biomarker Participating in the Pathogenesis of Non-alcoholic Fatty Liver Disease. Front Med (Lausanne) 2021; 8:653293. [PMID: 34395461 PMCID: PMC8358116 DOI: 10.3389/fmed.2021.653293] [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] [Received: 01/14/2021] [Accepted: 07/07/2021] [Indexed: 12/16/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is currently the most common cause of chronic liver disorder worldwide. The pathological spectrum of NAFLD ranges from simple steatosis to non-alcoholic steatohepatitis (NASH) that induces progressive liver cirrhosis and eventually hepatocellular carcinoma (HCC). However, the molecular mechanisms driving the transformation of NASH are obscure. There is a compelling need for understanding the pathogenic mechanisms of NASH, and thereby providing new insight into mechanism-based therapy. Currently, several studies reported that complement system, an innate immune system, played an important role in the pathogenesis of NAFLD, which was also proved by our recent study. Complement component 3 (C3), a protein of the innate immune system, plays a hub role in the complement system. Herein, we present a review on the role and molecular mechanism of C3 in NASH as well as its implication in NASH diagnosis and treatment.
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Affiliation(s)
- Juqiang Han
- Institute of Liver Disease, The 7th Medical Centre of Chinese People Liberation Army General Hospital, Beijing, China.,The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Institute of Digestive Disease, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong, China
| | - Xiang Zhang
- The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Institute of Digestive Disease, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong, China
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28
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King BC, Blom AM. Complement in metabolic disease: metaflammation and a two-edged sword. Semin Immunopathol 2021; 43:829-841. [PMID: 34159399 PMCID: PMC8613079 DOI: 10.1007/s00281-021-00873-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 05/23/2021] [Indexed: 01/28/2023]
Abstract
We are currently experiencing an enduring global epidemic of obesity and diabetes. It is now understood that chronic low-grade tissue inflammation plays an important role in metabolic disease, brought upon by increased uptake of a so-called Western diet, and a more sedentary lifestyle. Many evolutionarily conserved links exist between metabolism and the immune system, and an imbalance in this system induced by chronic over-nutrition has been termed 'metaflammation'. The complement system is an important and evolutionarily ancient part of innate immunity, but recent work has revealed that complement not only is involved in the recognition of pathogens and induction of inflammation, but also plays important roles in cellular and tissue homeostasis. Complement can therefore contribute both positively and negatively to metabolic control, depending on the nature and anatomical site of its activity. This review will therefore focus on the interactions of complement with mechanisms and tissues relevant for metabolic control, obesity and diabetes.
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Affiliation(s)
- B C King
- Department of Translational Medicine, Lund University, Lund, Sweden.
| | - A M Blom
- Department of Translational Medicine, Lund University, Lund, Sweden
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29
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Lu Z, Meng L, Sun Z, Shi X, Shao W, Zheng Y, Yao X, Song J. Differentially Expressed Genes and Enriched Signaling Pathways in the Adipose Tissue of Obese People. Front Genet 2021; 12:620740. [PMID: 34093637 PMCID: PMC8175074 DOI: 10.3389/fgene.2021.620740] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 04/15/2021] [Indexed: 12/20/2022] Open
Abstract
As the prevalence of obesity increases, so does the occurrence of obesity-related complications, such as cardiovascular and cerebrovascular diseases, diabetes, and some cancers. Increased adipose tissue is the main cause of harm in obesity. To better understand obesity and its related complications, we analyzed the mRNA expression profiles of adipose tissues from 126 patients with obesity and 275 non-obese controls. Using an integrated bioinformatics method, we explored the functions of 113 differentially expressed genes (DEGs) between them. Gene ontology (GO) and kyoto encyclopedia of genes and genomes (KEGG) pathway enrichment analyses revealed that upregulated DEGs were enriched in immune cell chemotaxis, complement-related cascade activation, and various inflammatory signaling pathways, while downregulated DEGs enriched in nutrient metabolism. The CIBERSORT algorithm indicated that an increase in macrophages may be the main cause of adipose tissue inflammation, while decreased γδ T cells reduce sympathetic action, leading to dysregulation of adipocyte thermogenesis. A protein-protein interaction network was constructed using the STRING database, and the top 10 hub genes were identified using the cytoHubba plug-in in Cytoscape. All were confirmed to be obesity-related using a separate dataset. In addition, we identified chemicals related to these hub genes that may contribute to obesity. In conclusion, we have successfully identified several hub genes in the development of obesity, which provide insights into the possible mechanisms controlling obesity and its related complications, as well as potential biomarkers and therapeutic targets for further research.
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Affiliation(s)
- Zhenhua Lu
- Department of General Surgery, Department of Hepato-Bilio-Pancreatic Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Lingbing Meng
- Department of Cardiology, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Zhen Sun
- Department of General Surgery, Department of Hepato-Bilio-Pancreatic Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Xiaolei Shi
- Department of General Surgery, Department of Hepato-Bilio-Pancreatic Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Weiwei Shao
- Department of General Surgery, Department of Hepato-Bilio-Pancreatic Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Yangyang Zheng
- Department of General Surgery, Department of Hepato-Bilio-Pancreatic Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Xinglei Yao
- Key Laboratory of Environmental Nanotechnology and Health Effects, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
| | - Jinghai Song
- Department of General Surgery, Department of Hepato-Bilio-Pancreatic Surgery, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
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The complex role of adipokines in obesity, inflammation, and autoimmunity. Clin Sci (Lond) 2021; 135:731-752. [PMID: 33729498 PMCID: PMC7969664 DOI: 10.1042/cs20200895] [Citation(s) in RCA: 101] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/24/2021] [Accepted: 03/04/2021] [Indexed: 12/12/2022]
Abstract
The global obesity epidemic is a major contributor to chronic disease and disability in the world today. Since the discovery of leptin in 1994, a multitude of studies have characterized the pathological changes that occur within adipose tissue in the obese state. One significant change is the dysregulation of adipokine production. Adipokines are an indispensable link between metabolism and optimal immune system function; however, their dysregulation in obesity contributes to chronic low-grade inflammation and disease pathology. Herein, I will highlight current knowledge on adipokine structure and physiological function, and focus on the known roles of these factors in the modulation of the immune response. I will also discuss adipokines in rheumatic and autoimmune diseases.
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31
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Koc G, Soyocak A, Alis H, Kankaya B, Kanigur G. Changes in VGF and C3aR1 gene expression in human adipose tissue in obesity. Mol Biol Rep 2020; 48:251-257. [PMID: 33306149 DOI: 10.1007/s11033-020-06043-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 11/28/2020] [Indexed: 01/03/2023]
Abstract
The VGF gene, which has been shown to be metabolically associated with energy balance, glucose homeostasis, insulin secretion process, and biological processes related to overeating, is prominent in relation to obesity. TLQP-21 neuropeptide, derived from the VGF, is considered to promote lipolysis by the beta-adrenergic pathway through targeting the C3aR1 receptor located in the adipocyte membrane. In this study, we aimed to measure the expression levels of the VGF and C3aR1 genes in the adipose tissue of obese subjects and individuals with normal weight determined based on body mass index (BMI), and to reveal the correlation of these levels with obesity. VGF and C3aR1 gene expression levels were measured using Real Time Polymerase Chain Reaction (RT PCR) in the visceral adipose tissue (VAT) samples of 52 obese patients (BMI ≥ 35 kg/m2) and 21 non-obese controls (BMI = 18.5-24.9 kg/m2). The results were statistically analyzed. The VGF expression was lower and the C3aR1 gene expression was higher in obese patients compared to the non-obese control group (p < 0.05). In obese patients, there was a statistically significant positive correlation of 85.6% between VGF and C3aR1, in which when one level increased, the other also increased (p < 0.05, r = 0.856). The findings show that the VGF may be significantly associated with obesity and is very important since it is the first to measure the level of VGF gene expression in human adipose tissue. This research provides new evidence of a link between obesity and VGF/C3aR1 and in the future may help design strategies to combat obesity.
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Affiliation(s)
- G Koc
- Department of Medical Biology, Faculty of Medicine, Istanbul Aydin University, Istanbul, Turkey.
| | - A Soyocak
- Department of Medical Biology, Faculty of Medicine, Istanbul Aydin University, Istanbul, Turkey
| | - H Alis
- Department of General Surgery, Faculty of Medicine, Istanbul Aydin University VM Medical Park Florya Hospital, Istanbul, Turkey
| | - B Kankaya
- Department of General Surgery, Faculty of Medicine, Istanbul Aydin University VM Medical Park Florya Hospital, Istanbul, Turkey
| | - G Kanigur
- Department of Medical Biology, Faculty of Medicine, Istanbul Aydin University, Istanbul, Turkey
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HFD-induced hepatic lipid accumulation and inflammation are decreased in Factor D deficient mouse. Sci Rep 2020; 10:17593. [PMID: 33067533 PMCID: PMC7568538 DOI: 10.1038/s41598-020-74617-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 09/30/2020] [Indexed: 12/12/2022] Open
Abstract
Excessive intake of fat causes accumulation of fat in liver, leading to non-alcoholic fatty liver disease (NAFLD). High-fat diet (HFD) upregulates the expression of Factor D, a complement pathway component, in the liver of mice. However, the functions of Factor D in liver are not well known. Therefore, the current study investigated the relationship between Factor D and hepatic lipid accumulation using CRISPR/Cas9-mediated Factor D knockout (FD-KO) mice. Factor D deficiency downregulated expression of genes related to fatty acid uptake and de novo lipogenesis in the liver. Furthermore, Factor D deficiency reduced the expression of inflammatory factors (Tnf and Ccl2) and fibrosis markers and decreased accumulation of F4/80-positive macrophages. These data suggest that the Factor D deficiency improved hepatic lipid accumulation and hepatic inflammation in HFD-fed mice.
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33
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McDonald TS, McCombe PA, Woodruff TM, Lee JD. The potential interplay between energy metabolism and innate complement activation in amyotrophic lateral sclerosis. FASEB J 2020; 34:7225-7233. [PMID: 32307753 DOI: 10.1096/fj.201901781] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 04/07/2020] [Indexed: 12/12/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal and rapidly progressing motor neuron disease without effective treatment. Although the precise mechanisms leading to ALS are yet to be determined, there is now increasing evidence implicating the defective energy metabolism and components of the innate immune complement system in the onset and progression of its motor phenotypes. This review will survey the mechanisms by which the energy metabolism and the complement system are altered during the disease progression of ALS and how it can contribute to disease. Furthermore, it will also examine how complement activation can modify the energy metabolism in metabolic disorders, in order to highlight how the complement system and energy metabolism may be linked in ALS.
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Affiliation(s)
- Tanya S McDonald
- School of Biomedical Sciences, The University of Queensland, St. Lucia, QLD, Australia
| | - Pamela A McCombe
- University of Queensland Centre for Clinical Research, The University of Queensland, Herston, QLD, Australia.,Department of Neurology, Royal Brisbane & Women's Hospital, Herston, QLD, Australia
| | - Trent M Woodruff
- School of Biomedical Sciences, The University of Queensland, St. Lucia, QLD, Australia
| | - John D Lee
- School of Biomedical Sciences, The University of Queensland, St. Lucia, QLD, Australia.,University of Queensland Centre for Clinical Research, The University of Queensland, Herston, QLD, Australia
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Ballester M, Quintanilla R, Ortega FJ, Serrano JCE, Cassanyé A, Rodríguez-Palmero M, Moreno-Muñoz JA, Portero-Otin M, Tibau J. Dietary intake of bioactive ingredients impacts liver and adipose tissue transcriptomes in a porcine model of prepubertal early obesity. Sci Rep 2020; 10:5375. [PMID: 32214182 PMCID: PMC7096439 DOI: 10.1038/s41598-020-62320-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 03/12/2020] [Indexed: 12/17/2022] Open
Abstract
Global prevalence of obesity has increased to epidemic proportions over the past 40 years, with childhood obesity reaching alarming rates. In this study, we determined changes in liver and adipose tissue transcriptomes of a porcine model for prepubertal early obesity induced by a high-calorie diet and supplemented with bioactive ingredients. A total of 43 nine-weeks-old animals distributed in four pens were fed with four different dietary treatments for 10 weeks: a conventional diet; a western-type diet; and a western-type diet with Bifidobacterium breve and rice hydrolysate, either adding or not omega-3 fatty acids. Animals fed a western-type diet increased body weight and total fat content and exhibited elevated serum concentrations of cholesterol, whereas animals supplemented with bioactive ingredients showed lower body weight gain and tended to accumulate less fat. An RNA-seq experiment was performed with a total of 20 animals (five per group). Differential expression analyses revealed an increase in lipogenesis, cholesterogenesis and inflammatory processes in animals on the western-type diet while the supplementation with bioactive ingredients induced fatty acid oxidation and cholesterol catabolism, and decreased adipogenesis and inflammation. These results reveal molecular mechanisms underlying the beneficial effects of bioactive ingredient supplementation in an obese pig model.
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Affiliation(s)
- Maria Ballester
- Animal Breeding and Genetics Programme, Institute for Research and Technology in Food and Agriculture (IRTA), Torre Marimon, 08140, Caldes de Montbui, Spain.
| | - Raquel Quintanilla
- Animal Breeding and Genetics Programme, Institute for Research and Technology in Food and Agriculture (IRTA), Torre Marimon, 08140, Caldes de Montbui, Spain
| | - Francisco J Ortega
- Department of Diabetes, Endocrinology, and Nutrition (UDEN), Institut d'Investigació Biomèdica de Girona (IdIBGi), Girona, Spain
- Centro de Investigación Biomédica en Red de la Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - José C E Serrano
- Department of Experimental Medicine, University of Lleida-Biomedical Research Institute of Lleida, 25196, Lleida, Spain
| | - Anna Cassanyé
- Department of Experimental Medicine, University of Lleida-Biomedical Research Institute of Lleida, 25196, Lleida, Spain
| | | | | | - Manuel Portero-Otin
- Department of Experimental Medicine, University of Lleida-Biomedical Research Institute of Lleida, 25196, Lleida, Spain
| | - Joan Tibau
- Animal Breeding and Genetics Programme, Institute for Research and Technology in Food and Agriculture (IRTA), Finca Camps i Armet, 17121, Monells, Spain
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35
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Su JB, Wu YY, Xu F, Wang X, Cai HL, Zhao LH, Zhang XL, Chen T, Huang HY, Wang XQ. Serum complement C3 and islet β-cell function in patients with type 2 diabetes: A 4.6-year prospective follow-up study. Endocrine 2020; 67:321-330. [PMID: 31786774 DOI: 10.1007/s12020-019-02144-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 11/18/2019] [Indexed: 12/16/2022]
Abstract
PURPOSE Serum complement C3 has been shown to contribute to the incidence of type 2 diabetes (T2D), but how serum complement C3 affects islet β-cell function throughout the course of T2D is unclear. This study explored whether serum complement C3 is independently associated with changes in islet β-cell function over time in patients with T2D. METHODS Serum complement C3 was measured, and endogenous β-cell function was evaluated by area under the C-peptide curve (AUCcp) during an oral glucose tolerance test (OGTT) in 411 patients with T2D at baseline from 2011 to 2015. Next, 347 of those patients with available data were pooled for a final follow-up analysis from 2014 to 2018. Changes in islet β-cell function at follow-up were evaluated by AUCcp percentage changes (ΔAUCcp%). In addition, other possible clinical risks for diabetes were also examined. RESULTS The 347 patients included in the analysis had a diabetes duration of 4.84 ± 3.63 years at baseline. Baseline serum complement C3 (baseline C3) levels were positively correlated with baseline natural logarithm of AUCcp (lnAUCcp) (n = 347, r = 0.288, p < 0.001), and baseline C3 was independently associated with baseline lnAUCcp (β = 0.17, t = 3.52, p < 0.001) after adjustment for baseline glycemic status and other clinical confounders by multivariate liner regression analysis. Compared with the baseline values, complement C3 changes (ΔC3) and ΔAUCcp% was -0.15 ± 0.28 mg/ml and -17.2 ± 18.4%, respectively, at a follow-up visit 4.57 ± 0.78 years later. Moreover, ΔC3 was positively correlated with ΔAUCcp% (n = 347, r = 0.302, p < 0.001). Furthermore, each 0.1 mg/ml increase in ΔC3 was associated with a higher ΔAUCcp% (1.41% [95% CI, 0.82-2.00%]) after adjusting for changes in glycemic status and other clinical confounders at follow-up. CONCLUSIONS In addition to serum complement C3 being independently associated with islet β-cell function at baseline, its changes were also independently associated with changes in islet β-cell function over time in patients with T2D.
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Affiliation(s)
- Jian-Bin Su
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, No. 6, Haierxiang North Road, Nantong, 226001, China.
| | - Yun-Yu Wu
- Medical School of Nantong University, No. 19, Qixiu Road, Nantong, 226001, China
| | - Feng Xu
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, No. 6, Haierxiang North Road, Nantong, 226001, China
| | - Xing Wang
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, No. 6, Haierxiang North Road, Nantong, 226001, China
| | - Hong-Li Cai
- Department of Geriatrics, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, No. 6 North Haierxiang Road, Nantong, 226001, China
| | - Li-Hua Zhao
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, No. 6, Haierxiang North Road, Nantong, 226001, China
| | - Xiu-Lin Zhang
- Department of Clinical Laboratory, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, No. 6, Haierxiang North Road, Nantong, 226001, China
| | - Tong Chen
- Department of Clinical Laboratory, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, No. 6, Haierxiang North Road, Nantong, 226001, China
| | - Hai-Yan Huang
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, No. 6, Haierxiang North Road, Nantong, 226001, China
| | - Xue-Qin Wang
- Department of Endocrinology, Affiliated Hospital 2 of Nantong University, and First People's Hospital of Nantong City, No. 6, Haierxiang North Road, Nantong, 226001, China.
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Shim K, Begum R, Yang C, Wang H. Complement activation in obesity, insulin resistance, and type 2 diabetes mellitus. World J Diabetes 2020; 11:1-12. [PMID: 31938469 PMCID: PMC6927818 DOI: 10.4239/wjd.v11.i1.1] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 11/07/2019] [Accepted: 11/26/2019] [Indexed: 02/05/2023] Open
Abstract
Amplified inflammatory reaction has been observed to be involved in cardiometabolic diseases such as obesity, insulin resistance, diabetes, dyslipidemia, and atherosclerosis. The complement system was originally viewed as a supportive first line of defense against microbial invaders, and research over the past decade has come to appreciate that the functions of the complement system extend beyond the defense and elimination of microbes, involving in such diverse processes as clearance of the immune complexes, complementing T and B cell immune functions, tissue regeneration, and metabolism. The focus of this review is to summarize the role of the activation of complement system and the initiation and progression of metabolic disorders including obesity, insulin resistance and diabetes mellitus. In addition, we briefly describe the interaction of the activation of the complement system with diabetic complications such as diabetic retinopathy, nephropathy and neuropathy, highlighting that targeting complement system therapeutics could be one of possible routes to slow down those aforementioned diabetic complications.
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Affiliation(s)
- Kyumin Shim
- Department of Basic Science, California Northstate University College of Medicine, Elk Grove, CA 95757, United States
| | - Rayhana Begum
- Department of Pharmacy, Primeasia University, Dhaka 1213, Bangladesh
| | - Catherine Yang
- Department of Basic Science, California Northstate University College of Medicine, Elk Grove, CA 95757, United States
- California Northstate University College of Graduate Studies, Elk Grove, CA 95757, United States
| | - Hongbin Wang
- Department of Basic Science, California Northstate University College of Medicine, Elk Grove, CA 95757, United States
- California Northstate University College of Graduate Studies, Elk Grove, CA 95757, United States
- Department of Pharmaceutical and Biomedical Sciences, California Northstate University College of Pharmacy, Elk Grove, CA 95757, United States
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37
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Rowley JA, Reid RC, Poon EKY, Wu KC, Lim J, Lohman RJ, Hamidon JK, Yau MK, Halili MA, Durek T, Iyer A, Fairlie DP. Potent Thiophene Antagonists of Human Complement C3a Receptor with Anti-Inflammatory Activity. J Med Chem 2020; 63:529-541. [PMID: 31910011 DOI: 10.1021/acs.jmedchem.9b00927] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Structure-activity relationships for a series of small-molecule thiophenes resulted in potent and selective antagonism of human Complement C3a receptor. The compounds are about 100-fold more potent than the most reported antagonist SB290157. A new compound JR14a was among the most potent of the new antagonists in vitro, assessed by (a) inhibition of intracellular calcium release (IC50 10 nM) induced in human monocyte-derived macrophages by 100 nM C3a, (b) inhibition of β-hexosaminidase secretion (IC50 8 nM) from human LAD2 mast cells degranulated by 100 nM C3a, and (c) selectivity for human C3aR over C5aR. JR14a was metabolically stable in rat plasma and in rat liver microsomes and efficacious in rats when given orally to suppress rat paw inflammation, macrophage and mast cell activation, and histopathology induced by intraplantar paw administration of a C3aR agonist. Potent C3aR antagonists are now available for interrogating C3a receptor activation and suppressing C3aR-mediated inflammation in mammalian physiology and disease.
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38
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Bresciani E, Possenti R, Coco S, Rizzi L, Meanti R, Molteni L, Locatelli V, Torsello A. TLQP-21, A VGF-Derived Peptide Endowed of Endocrine and Extraendocrine Properties: Focus on In Vitro Calcium Signaling. Int J Mol Sci 2019; 21:ijms21010130. [PMID: 31878142 PMCID: PMC6982260 DOI: 10.3390/ijms21010130] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 12/13/2019] [Accepted: 12/20/2019] [Indexed: 12/20/2022] Open
Abstract
VGF gene encodes for a neuropeptide precursor of 68 kDa composed by 615 (human) and 617 (rat, mice) residues, expressed prevalently in the central nervous system (CNS), but also in the peripheral nervous system (PNS) and in various endocrine cells. This precursor undergoes proteolytic cleavage, generating a family of peptides different in length and biological activity. Among them, TLQP-21, a peptide of 21 amino acids, has been widely investigated for its relevant endocrine and extraendocrine activities. The complement complement C3a receptor-1 (C3aR1) has been suggested as the TLQP-21 receptor and, in different cell lines, its activation by TLQP-21 induces an increase of intracellular Ca2+. This effect relies both on Ca2+ release from the endoplasmic reticulum (ER) and extracellular Ca2+ entry. The latter depends on stromal interaction molecules (STIM)-Orai1 interaction or transient receptor potential channel (TRPC) involvement. After Ca2+ entry, the activation of outward K+-Ca2+-dependent currents, mainly the KCa3.1 currents, provides a membrane polarizing influence which offset the depolarizing action of Ca2+ elevation and indirectly maintains the driving force for optimal Ca2+ increase in the cytosol. In this review, we address the main endocrine and extraendocrine actions displayed by TLQP-21, highlighting recent findings on its mechanism of action and its potential in different pathological conditions.
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Affiliation(s)
- Elena Bresciani
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (S.C.); (L.R.); (R.M.); (L.M.); (V.L.); (A.T.)
- Correspondence:
| | - Roberta Possenti
- Department of Systems Medicine, University of Roma Tor Vergata, 00133 Roma, Italy;
| | - Silvia Coco
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (S.C.); (L.R.); (R.M.); (L.M.); (V.L.); (A.T.)
| | - Laura Rizzi
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (S.C.); (L.R.); (R.M.); (L.M.); (V.L.); (A.T.)
| | - Ramona Meanti
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (S.C.); (L.R.); (R.M.); (L.M.); (V.L.); (A.T.)
| | - Laura Molteni
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (S.C.); (L.R.); (R.M.); (L.M.); (V.L.); (A.T.)
| | - Vittorio Locatelli
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (S.C.); (L.R.); (R.M.); (L.M.); (V.L.); (A.T.)
| | - Antonio Torsello
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy; (S.C.); (L.R.); (R.M.); (L.M.); (V.L.); (A.T.)
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Li XQ, Chang DY, Chen M, Zhao MH. Deficiency of C3a receptor attenuates the development of diabetic nephropathy. BMJ Open Diabetes Res Care 2019; 7:e000817. [PMID: 31798904 PMCID: PMC6861086 DOI: 10.1136/bmjdrc-2019-000817] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 09/18/2019] [Accepted: 10/16/2019] [Indexed: 12/19/2022] Open
Abstract
Objective Diabetic nephropathy (DN) is the leading cause of chronic kidney disease and end-stage renal disease. Emerging evidence suggests that complement activation is involved in the pathogenesis of DN. The aim of this study was to investigate the pathogenic role of C3a and C3a receptor (C3aR) in DN. Research design and methods The expression of C3aR was examined in the renal specimen of patients with DN. Using a C3aR gene knockout mice (C3aR-/-), we evaluated kidney injury in diabetic mice. The mouse gene expression microarray was performed to further explore the pathogenic role of C3aR. Then the underlying mechanism was investigated in vitro with macrophage treated with C3a. Results Compared with normal controls, the renal expression of C3aR was significantly increased in patients with DN. C3aR-/- diabetic mice developed less severe diabetic renal damage compared with wild-type (WT) diabetic mice, exhibiting significantly lower level of albuminuria and milder renal pathological injury. Microarray profiling uncovered significantly suppressed inflammatory responses and T-cell adaptive immunity in C3aR-/- diabetic mice compared with WT diabetic mice, and this result was further verified by immunohistochemical staining of renal CD4+, CD8+ T cells and macrophage infiltration. In vitro study demonstrated C3a can enhance macrophage-secreted cytokines which could induce inflammatory responses and differentiation of T-cell lineage. Conclusions C3aR deficiency could attenuate diabetic renal damage through suppressing inflammatory responses and T-cell adaptive immunity, possibly by influencing macrophage-secreted cytokines. Thus, C3aR may be a promising therapeutic target for DN.
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Affiliation(s)
- Xiao-Qian Li
- Renal Division, Department of Medicine, Peking University First Hospital, Peking University Institute of Nephrology, Key Laboratory of Renal Disease, Ministry of Health of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Dong-Yuan Chang
- Renal Division, Department of Medicine, Peking University First Hospital, Peking University Institute of Nephrology, Key Laboratory of Renal Disease, Ministry of Health of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Min Chen
- Renal Division, Department of Medicine, Peking University First Hospital, Peking University Institute of Nephrology, Key Laboratory of Renal Disease, Ministry of Health of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Ming-Hui Zhao
- Renal Division, Department of Medicine, Peking University First Hospital, Peking University Institute of Nephrology, Key Laboratory of Renal Disease, Ministry of Health of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
- Peking-Tsinghua Center for Life Sciences, Beijing, China
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Saleh J, Al-Maqbali M, Abdel-Hadi D. Role of Complement and Complement-Related Adipokines in Regulation of Energy Metabolism and Fat Storage. Compr Physiol 2019; 9:1411-1429. [PMID: 31688967 DOI: 10.1002/cphy.c170037] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Adipose tissue releases many cytokines and inflammatory factors described as adipokines. In obesity, adipokines released from expanding adipose tissue are implicated in disease progression and metabolic dysfunction. However, mechanisms controlling the progression of adiposity and metabolic complications are not fully understood. It has been suggested that expanding fat mass and sustained release of inflammatory adipokines in adipose tissue lead to hypoxia, oxidative stress, apoptosis, and cellular damage. These changes trigger an immune response involving infiltration of adipose tissue with immune cells, complement activation and generation of factors involved in opsonization and clearance of damaged cells. Abundant evidence now indicates that adipose tissue is an active secretory source of complement and complement-related adipokines that, in addition to their inflammatory role, contribute to the regulation of metabolic function. This article highlights advances in knowledge regarding the role of these adipokines in energy regulation of adipose tissue through modulating lipogenic and lipolytic pathways. Several adipokines will be discussed including adipsin, Factor H, properdin, C3a, Acylation-Stimulating Protein, C1q/TNF-related proteins, and response gene to complement-32 (RGC-32). Interactions between these factors will be described considering their immune-metabolic roles in the adipose tissue microenvironment and their potential contribution to progression of adiposity and metabolic dysfunction. The differential expression and the role of complement factors in gender-related fat partitioning will also be addressed. Identifying lipogenic adipokines and their specific autocrine/paracrine roles may provide means for adipose-tissue-targeted therapeutic interventions that may disrupt the vicious circle of adiposity and disease progression. © 2019 American Physiological Society. Compr Physiol 9:1411-1429, 2019.
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Affiliation(s)
- Jumana Saleh
- Biochemistry Department, College of Medicine & Health Sciences, Sultan Qaboos University, Muscat, Oman
| | - Muna Al-Maqbali
- Biochemistry Department, College of Medicine, Sultan Qaboos University, Muscat, Oman
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Sahu BS, Rodriguez P, Nguyen ME, Han R, Cero C, Razzoli M, Piaggi P, Laskowski LJ, Pavlicev M, Muglia L, Mahata SK, O'Grady S, McCorvy JD, Baier LJ, Sham YY, Bartolomucci A. Peptide/Receptor Co-evolution Explains the Lipolytic Function of the Neuropeptide TLQP-21. Cell Rep 2019; 28:2567-2580.e6. [PMID: 31484069 PMCID: PMC6753381 DOI: 10.1016/j.celrep.2019.07.101] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 06/11/2019] [Accepted: 07/26/2019] [Indexed: 12/24/2022] Open
Abstract
Structural and functional diversity of peptides and GPCR result from long evolutionary processes. Even small changes in sequence can alter receptor activation, affecting therapeutic efficacy. We conducted a structure-function relationship study on the neuropeptide TLQP-21, a promising target for obesity, and its complement 3a receptor (C3aR1). After having characterized the TLQP-21/C3aR1 lipolytic mechanism, a homology modeling and molecular dynamics simulation identified the TLQP-21 binding motif and C3aR1 binding site for the human (h) and mouse (m) molecules. mTLQP-21 showed enhanced binding affinity and potency for hC3aR1 compared with hTLQP-21. Consistently, mTLQP-21, but not hTLQP-21, potentiates lipolysis in human adipocytes. These findings led us to uncover five mutations in the C3aR1 binding pocket of the rodent Murinae subfamily that are causal for enhanced calculated affinity and measured potency of TLQP-21. Identifying functionally relevant peptide/receptor co-evolution mechanisms can facilitate the development of innovative pharmacotherapies for obesity and other diseases implicating GPCRs.
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Affiliation(s)
- Bhavani S Sahu
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6(th) St. SE, Minneapolis, MN, USA
| | - Pedro Rodriguez
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6(th) St. SE, Minneapolis, MN, USA
| | - Megin E Nguyen
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6(th) St. SE, Minneapolis, MN, USA
| | - Ruijun Han
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6(th) St. SE, Minneapolis, MN, USA
| | - Cheryl Cero
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6(th) St. SE, Minneapolis, MN, USA
| | - Maria Razzoli
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6(th) St. SE, Minneapolis, MN, USA
| | - Paolo Piaggi
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes, Digestive and Kidney Diseases, NIH, Phoenix, AZ, USA
| | - Lauren J Laskowski
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Mihaela Pavlicev
- Division of Human Genetics, Center for Prevention of Preterm Birth, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Louis Muglia
- Division of Human Genetics, Center for Prevention of Preterm Birth, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Sushil K Mahata
- VA San Diego Healthcare System, San Diego, CA, USA; Department of Medicine, University of California at San Diego, La Jolla, CA, USA
| | - Scott O'Grady
- Department of Animal Science, University of Minnesota, 480 Haecker Hall, 1364 Eckles Avenue, St. Paul, MN, USA
| | - John D McCorvy
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Leslie J Baier
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes, Digestive and Kidney Diseases, NIH, Phoenix, AZ, USA
| | - Yuk Y Sham
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6(th) St. SE, Minneapolis, MN, USA; Bioinformatics and Computational Biology Program, University of Minnesota, Minneapolis, MN, USA
| | - Alessandro Bartolomucci
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6(th) St. SE, Minneapolis, MN, USA.
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Zhang C, Zhang J, Liu W, Chen X, Liu Z, Zhou Z. Improvements in humoral immune function and glucolipid metabolism after laparoscopic sleeve gastrectomy in patients with obesity. Surg Obes Relat Dis 2019; 15:1455-1463. [DOI: 10.1016/j.soard.2019.05.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/30/2019] [Accepted: 05/12/2019] [Indexed: 02/08/2023]
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Wang X, Iyer A, Lyons AB, Körner H, Wei W. Emerging Roles for G-protein Coupled Receptors in Development and Activation of Macrophages. Front Immunol 2019; 10:2031. [PMID: 31507616 PMCID: PMC6718513 DOI: 10.3389/fimmu.2019.02031] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 08/12/2019] [Indexed: 12/12/2022] Open
Abstract
Macrophages have emerged as a key component of the innate immune system that emigrates to peripheral tissues during gestation and in the adult organism. Their complex pathway to maturity, their unique plasticity and their various roles as effector and regulatory cells during an immune response have been the focus of intense research. A class of surface molecules, the G-Protein coupled receptors (GPCRs) play important roles in many immune processes. They have drawn attention in regard to these functions and the potential for therapeutic targets that can modulate the response of immune cells in pathologies such as diabetes, atherosclerosis, and chronic inflammatory diseases. Of the more than 800 GPCRs identified, ~100 are currently targeted with drugs which have had their activity investigated in vivo. Macrophages express a number of GPCRs which have central roles during cell differentiation and in the regulation of their functions. While some macrophage GPCRs such as chemokine receptors have been studied in great detail, the roles of other receptors of this large family are still not well understood. This review summarizes new insights into macrophage biology, differences of human, and mouse macrophages and gives details of some of the GPCRs expressed by this cell type.
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Affiliation(s)
- Xinming Wang
- Key Laboratory of Anti-inflammatory and Immune Medicine, Anhui Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Institute of Clinical Pharmacology, Ministry of Education, Anhui Medical University, Hefei, China.,Department of Pharmacy, First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Abishek Iyer
- Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD, Australia
| | - A Bruce Lyons
- School of Medicine, University of Tasmania, Hobart, TAS, Australia
| | - Heinrich Körner
- Key Laboratory of Anti-inflammatory and Immune Medicine, Anhui Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Institute of Clinical Pharmacology, Ministry of Education, Anhui Medical University, Hefei, China.,Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Wei Wei
- Key Laboratory of Anti-inflammatory and Immune Medicine, Anhui Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Institute of Clinical Pharmacology, Ministry of Education, Anhui Medical University, Hefei, China
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Akgün E, Lunzer MM, Portoghese PS. Combined Glia Inhibition and Opioid Receptor Agonism Afford Highly Potent Analgesics without Tolerance. ACS Chem Neurosci 2019; 10:2004-2011. [PMID: 30110531 DOI: 10.1021/acschemneuro.8b00323] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Commonly prescribed opioid analgesics produce tolerance upon chronic use due in part to induction of hyperalgesia. Given that two reported bivalent ligands (MMG22 and MCC22) produce potent antinociception without tolerance only in inflamed mice, we have investigated the possible cellular and receptor targets of these ligands. The selective microglia inhibitors, minocycline and SB290157, antagonized intrathecal (i.t.) MCC22 antinociception orders of magnitude more potently than MMG22, suggesting that MCC22 selectively targets activated microglia. The astrocyte toxin, l-α-aminoadipic acid antagonized MMG22 antinociception 126-fold without reducing the potency of MCC22, indicating that activated astrocytes are targets of MMG22. MK-801 and Ro25-6981 antagonism of MMG22 antinociception, but not MCC22, is consistent with selective inhibition of activated NMDAR in astrocytes. The antinociception produced by i.t. MMG22 or MCC22 were both antagonized by the selective mu opioid receptor antagonist, β-FNA, implicating interaction of these ligands with MOR in spinal afferent neurons. MCC22 antinociception was potently blocked by kainate or AMPA ion channel antagonists (LY382884; NBQX), in contrast to MMG22. It is concluded that i.t. MMG22 and MCC22 produce exceptional antinociception via potent inhibition of activated spinal glia, thereby leading to desensitization of spinal neurons and enhanced activation of neuronal MOR. Thus, the present study suggests a new approach to treatment of chronic inflammatory pain without tolerance through a single molecular entity that simultaneously inhibits activated glia and stimulates MOR in spinal neurons.
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Affiliation(s)
- Eyup Akgün
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Mary M. Lunzer
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Philip S. Portoghese
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455, United States
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Abstract
Preeclampsia (PE) is a devastating adverse outcome of pregnancy. Characterized by maternal hypertension, PE, when left untreated, can result in death of both mother and baby. The cause of PE remains unknown, and there is no way to predict which women will develop PE during pregnancy. The only known treatment is delivery of both the fetus and placenta; therefore, an abnormal placenta is thought to play a causal role. Women with obesity before pregnancy have an increased chance of developing PE. Increased adiposity results in a heightened state of systemic inflammation that can influence placental development. Adipose tissue is a rich source of proinflammatory cytokines and complement proteins, which have been implicated in the pathogenesis of PE by promoting the expression of antiangiogenic factors in the mother. Because an aggravated inflammatory response, angiogenic imbalance, and abnormal placentation are observed in PE, we hypothesize that maternal obesity and complement proteins derived from adipose tissue play an important role in the development of PE.
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Affiliation(s)
- Kelsey N Olson
- Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University , Baton Rouge, Louisiana.,Reproductive Endocrinology & Women's Health Lab, Pennington Biomedical Research Center , Baton Rouge, Louisiana
| | - Leanne M Redman
- Reproductive Endocrinology & Women's Health Lab, Pennington Biomedical Research Center , Baton Rouge, Louisiana
| | - Jenny L Sones
- Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University , Baton Rouge, Louisiana
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Wang JS, Lee WJ, Lee IT, Lin SY, Lee WL, Liang KW, Sheu WHH. Association Between Serum Adipsin Levels and Insulin Resistance in Subjects With Various Degrees of Glucose Intolerance. J Endocr Soc 2018; 3:403-410. [PMID: 30746502 PMCID: PMC6364621 DOI: 10.1210/js.2018-00359] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 12/11/2018] [Indexed: 02/06/2023] Open
Abstract
Context The association between adipsin and glucose metabolism in human subjects remains unclear. Objective We investigated the associations between adipsin and insulin resistance/β-cell function in subjects with various degrees of glucose intolerance. Design Fasting blood samples were collected for measurements of fasting plasma glucose (FPG), insulin, and adipsin. An oral glucose tolerance test was conducted in subjects with no history of diabetes. Setting This study was conducted at a medical center. Patients We enrolled 240 subjects with no history of diabetes and 80 patients with known type 2 diabetes (T2D) on diet control or metformin monotherapy. Main Outcome Measure β-cell function and insulin resistance were assessed using the homeostasis model assessment (HOMA-β and HOMA-IR, respectively). Results Levels of serum adipsin were higher in subjects with normal glucose tolerance (4.0 ± 1.1 µg/mL) or prediabetes (4.0 ± 1.5 µg/mL) compared with subjects with newly diagnosed diabetes (3.8 ± 1.1 µg/mL) or with known T2D on diet control (3.4 ± 1.0 µg/mL) or metformin monotherapy (3.0 ± 1.0 µg/mL, P < 0.001). There was no significant association between adipsin and HOMA-β. In contrast, there was an independent negative association between adipsin and HOMA-IR (β coefficient −0.414, 95% CI −0.720 to −0.109, P = 0.008). The association was more prominent in subjects with a body mass index (BMI) ≥25 kg/m2 or an FPG ≥100 mg/dL (P interaction < 0.001 and 0.014, respectively). Conclusions Serum adipsin levels were negatively associated with insulin resistance, especially in subjects with a BMI ≥25 kg/m2 or an FPG ≥100 mg/dL.
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Affiliation(s)
- Jun-Sing Wang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.,Department of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,PhD Program in Translational Medicine, National Chung Hsing University, Taichung, Taiwan.,Rong Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung, Taiwan
| | - Wen-Jane Lee
- Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan
| | - I-Te Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.,Department of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Medicine, School of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Shih-Yi Lin
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.,Department of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Center of Geriatrics and Gerontology, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Wen-Lieng Lee
- Department of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Cardiovascular Center, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Kae-Woei Liang
- Department of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Medicine, School of Medicine, Chung Shan Medical University, Taichung, Taiwan.,Cardiovascular Center, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Wayne Huey-Herng Sheu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.,Department of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Rong Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung, Taiwan.,School of Medicine, National Defense Medical Center, Taipei, Taiwan
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An updated Alzheimer hypothesis: Complement C3 and risk of Alzheimer's disease-A cohort study of 95,442 individuals. Alzheimers Dement 2018; 14:1589-1601. [PMID: 30243924 DOI: 10.1016/j.jalz.2018.07.223] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 07/16/2018] [Accepted: 07/31/2018] [Indexed: 02/06/2023]
Abstract
INTRODUCTION We tested the hypothesis that low plasma complement C3 is observationally and genetically associated with high risk of Alzheimer's disease (AD). METHODS We studied 95,442 individuals enrolled in the Copenhagen General Population Study. In genetic analyses, we further included 8367 individuals from the Copenhagen City Heart Study. In the two studies, 1189 and 35 developed AD during median 8 years follow-up. RESULTS The multifactorially adjusted hazard ratio for risk of AD for a one standard deviation lower levels of complement C3 was 1.11 (95% confidence interval: 1.04-1.19) in all individuals and 1.66 (1.33-2.07) in APOE ε44 carriers. In Mendelian randomization, the corresponding genetic estimates were 1.66 (1.05-2.63) overall and 1.99 (0.52-7.65) in APOE ε44 carriers. DISCUSSION Low baseline levels of complement C3 were associated with high risk of AD. The risk was amplified in APOE ε44 highly susceptible individuals, and these findings were substantiated by a Mendelian randomization approach, potentially implying causality. Based on these findings, we present and thoroughly discuss an updated Alzheimer hypothesis incorporating low complement C3 levels.
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Mommert S, Aslan D, Ratz L, Stark H, Gutzmer R, Werfel T. The Anaphylatoxin C3a Receptor Expression on Human M2 Macrophages Is Down-Regulated by Stimulating the Histamine H4 Receptor and the IL-4 Receptor. J Innate Immun 2018; 10:349-362. [PMID: 30032131 DOI: 10.1159/000490426] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 05/28/2018] [Indexed: 12/19/2022] Open
Abstract
The anaphylatoxin C3a triggers inflammation by binding to its specific G-protein-coupled C3a receptor (C3aR). Since the number of C3aR, which is expressed on the cell surface, affects the response to C3a, we investigated the expression levels of C3aR on human M2 macrophages in allergic situations where high levels of the Th2 cytokine IL-4 and histamine are present in a local microenvironment. The histamine H1 receptor (H1R), H2R and the H4R mRNA expressions were induced or up-regulated during the differentiation process of M2 macrophages. The presence of histamine or agonists targeting the H1R, H2R and, in particular, the H4R during in vitro differentiation from monocytes to macrophages modified the M2 phenotype by regulating the macrophage differentiation marker CD68 and CD163 expressions. In -addition, the C3aR expression was also down-regulated by -ST-1006 during this process. Histamine and ST-1006 down-regulated the expression of C3aR with different time kinetics on fully differentiated M2 macrophages. By analysing C3a-induced IL-6 mRNA expression, we observed a diminished response to C3a in ST-1006-treated M2 macrophages when compared to un-treated cells. Expression of C3 was not affected by histamine, whereas IL-4 strongly down-regulated C3aR and C3 expressions. Our data suggests that down-regulation of C3aR expression by mediators present in allergic situations such as IL-4 or histamine has an anti-inflammatory impact by reducing the sensitivity to C3a-induced down-stream signaling, thereby contributing to the regulation of local inflammatory responses in the skin.
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Affiliation(s)
- Susanne Mommert
- Division of Immunodermatology and Allergy Research, Department of Dermatology and Allergy, Hannover Medical School, Hannover, Germany
| | - Derya Aslan
- Division of Immunodermatology and Allergy Research, Department of Dermatology and Allergy, Hannover Medical School, Hannover, Germany
| | - Lisanne Ratz
- Division of Immunodermatology and Allergy Research, Department of Dermatology and Allergy, Hannover Medical School, Hannover, Germany
| | - Holger Stark
- Institute of Pharmaceutical and Medicinal Chemistry, Heinrich Heine University, Duesseldorf, Germany
| | - Ralf Gutzmer
- Division of Immunodermatology and Allergy Research, Department of Dermatology and Allergy, Hannover Medical School, Hannover, Germany
| | - Thomas Werfel
- Division of Immunodermatology and Allergy Research, Department of Dermatology and Allergy, Hannover Medical School, Hannover, Germany
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Rasmussen KL, Nordestgaard BG, Nielsen SF. Complement C3 and Risk of Diabetic Microvascular Disease: A Cohort Study of 95202 Individuals from the General Population. Clin Chem 2018. [PMID: 29523638 DOI: 10.1373/clinchem.2018.287581] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Whether the complement system is involved in the development of diabetic microvascular disease is unknown. We tested the hypothesis that high concentrations of complement C3 are associated with increased risk of diabetic retinopathy, nephropathy, and neuropathy in individuals from the general population. METHODS We studied 95202 individuals from the general population with baseline measurements of complement C3, genotyped for rs1065489, rs429608, and rs448260 determining concentrations of complement C3, and enrolled in the Copenhagen General Population Study from 2003 through 2013, following them until April 10, 2013. Rs1065489, rs429608, and rs448260 were identified with genome-wide association scans in 3752 individuals from the Copenhagen City Heart Study. RESULTS The cumulative incidence was increased from the lowest tertile to the highest tertile of complement C3 for diabetic retinopathy (log-rank trend, P = 1 × 10-20), nephropathy (P = 7 × 10-15), and neuropathy (P = 5 × 10-10). Multifactorially adjusted hazard ratios for a 1 SD higher concentration of complement C3 were 1.87 (95% CI, 1.61-2.18) for diabetic retinopathy, 1.90 (1.62-2.23) for diabetic nephropathy, and 1.56 (1.29-1.89) for diabetic neuropathy. The multifactorially adjusted hazard ratio for individuals with the highest vs lowest tertile of complement C3 was 3.29 (1.78-6.07) for retinopathy, 2.71 (1.42-5.16) for nephropathy, and 2.40 (1.26-4.54) for neuropathy. CONCLUSIONS High baseline concentrations of complement C3 were associated with increased risk of diabetic retinopathy, nephropathy, and neuropathy in individuals from the general population. These epidemiological findings were substantiated by a Mendelian randomization approach, potentially indicating causality.
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Affiliation(s)
- Katrine Laura Rasmussen
- Department of Clinical Biochemistry, Herlev and Gentofte Hospital, Copenhagen University Hospital, Faculty of Health and Medical Sciences, University of Copenhagen, Herlev, Denmark
| | - Børge Grønne Nordestgaard
- Department of Clinical Biochemistry, Herlev and Gentofte Hospital, Copenhagen University Hospital, Faculty of Health and Medical Sciences, University of Copenhagen, Herlev, Denmark
| | - Sune Fallgaard Nielsen
- Department of Clinical Biochemistry, Herlev and Gentofte Hospital, Copenhagen University Hospital, Faculty of Health and Medical Sciences, University of Copenhagen, Herlev, Denmark.
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Bao X, Borné Y, Johnson L, Muhammad IF, Persson M, Niu K, Engström G. Comparing the inflammatory profiles for incidence of diabetes mellitus and cardiovascular diseases: a prospective study exploring the 'common soil' hypothesis. Cardiovasc Diabetol 2018; 17:87. [PMID: 29895294 PMCID: PMC5996509 DOI: 10.1186/s12933-018-0733-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 06/06/2018] [Indexed: 12/15/2022] Open
Abstract
Background Chronic low-grade inflammation and associated insulin resistance and metabolic abnormalities have been proposed as ‘common soil’ for diabetes mellitus (DM) and cardiovascular disease (CVD). This paper aimed to investigate the inflammatory profiles of DM and CVD and to distinguish their shared and specific markers. Methods Based on the Malmö Diet and Cancer cohort, total and differential leukocyte counts were measured in 25,969 participants without previous DM or CVD and were studied in relation to incident DM (mean follow-up 17.4 ± 5.58 years) and incident CVD (i.e., coronary events, including fatal and nonfatal myocardial infarction, or stroke); mean follow-up 17.7 ± 5.46 years, using multivariable Cox regression models. Furthermore, plasma concentrations of another seven inflammatory markers were examined in relation to incident DM and incident CVD in a sub-cohort of 4658 participants. The associations of each inflammatory marker with incident DM versus incident CVD were compared using the Lunn–McNeil competing risks approach. In sensitivity analyses, those who developed both DM and CVD during follow-up were excluded. Results After adjustment for conventional risk factors, total and differential leukocyte counts, orosomucoid, and C-reactive protein were associated with an increased risk of both DM and CVD. Neutrophil to lymphocyte ratio, ceruloplasmin, alpha1-antitrypsin and soluble urokinase plasminogen activator receptor predicted increased risk of CVD but not DM, while haptoglobin and complement C3 showed the opposite pattern. In competing risks analyses, lymphocyte count and complement C3 had stronger associations with risk of DM than with risk of CVD (p for equal associations = 0.020 and 0.006). The reverse was true for neutrophil to lymphocyte ratio (p for equal associations = 0.025). Results were consistent in sensitivity analyses. Conclusions The results indicated substantial similarities in the inflammatory profiles associated with DM and CVD. However, there are also significant differences. These findings may help discriminate between individuals at elevated risk of DM and those at elevated risk of CVD, which is a prerequisite for targeted therapies. Electronic supplementary material The online version of this article (10.1186/s12933-018-0733-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xue Bao
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China. .,Department of Clinical Sciences, Lund University, CRC 60:13, Jan Waldenströms gata 35, 20502, Malmö, Sweden.
| | - Yan Borné
- Department of Clinical Sciences, Lund University, CRC 60:13, Jan Waldenströms gata 35, 20502, Malmö, Sweden
| | - Linda Johnson
- Department of Clinical Sciences, Lund University, CRC 60:13, Jan Waldenströms gata 35, 20502, Malmö, Sweden
| | - Iram Faqir Muhammad
- Department of Clinical Sciences, Lund University, CRC 60:13, Jan Waldenströms gata 35, 20502, Malmö, Sweden
| | - Margaretha Persson
- Department of Clinical Sciences, Lund University, CRC 60:13, Jan Waldenströms gata 35, 20502, Malmö, Sweden
| | - Kaijun Niu
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China
| | - Gunnar Engström
- Department of Clinical Sciences, Lund University, CRC 60:13, Jan Waldenströms gata 35, 20502, Malmö, Sweden
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