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Wang Q, Li H, Lu H, Wang S, Li Y, Zhang Z, Han J, Yang Z, Yang Y, Hong Y. SAA1 exacerbates pancreatic β-cell dysfunction through activation of NF-κB signaling in high-fat diet-induced type 2 diabetes mice. Mol Cell Endocrinol 2023; 576:112043. [PMID: 37574124 DOI: 10.1016/j.mce.2023.112043] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 08/08/2023] [Accepted: 08/10/2023] [Indexed: 08/15/2023]
Abstract
Insufficient decompensated insulin secretion and insulin resistance caused by pancreatic β-cell dysfunction are the pathological bases of type 2 diabetes mellitus (T2DM). Glucolipotoxicity in pancreatic β-cells is an important factor leading to their dysfunction, closely related to inflammatory signals, oxidative stress, mitochondrial dysfunction, and endoplasmic reticulum stress (ERs). However, there may be other unproven regulatory mechanisms that govern pancreatic β-cell dysfunction. Therefore, further elucidation of the underlying mechanisms that lead to pancreatic β-cells dysfunction will provide a sufficient theoretical basis for the more effective prevention and treatment of T2DM. As a stress protein with pro-inflammatory properties, Serum Amyloid 1 (SAA1) promotes the progression of metabolic syndrome-related diseases by activating immune cells and damaging endothelial cells. In the development of T2DM, the activation of nuclear factor-kappa B (NF-κB) signaling aggravates pancreatic β-cells dysfunction under the stimulation of free fatty acids (FFAs), inflammatory factors, and chemokines. Moreover, the facilitating effect of SAA1 on the activation of the NF-κB signaling pathway has been demonstrated in other studies. In the present study, we demonstrated that SAA1 inhibits insulin secretion and promotes apoptotic molecular expression in pancreatic cells and islets and that NF-κB signaling inhibitors could reduce this effect of SAA1. SAA1 deficiency improved high-fat diet (HFD)-induced pancreatic β-cell dysfunction and decreased expression of NF-κB signaling molecules. Our findings suggested that HFD-induced SAA1 might exacerbate T2DM by enhancing pancreatic β-cell dysfunction; such a function of SAA1 might depend on NF-κB signaling activation.
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Affiliation(s)
- Qi Wang
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, 550025, PR China
| | - Hong Li
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, 550025, PR China
| | - Henghao Lu
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, 550025, PR China
| | - Shumin Wang
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, 550025, PR China
| | - Yuxiu Li
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, 550025, PR China
| | - Zhenfen Zhang
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, 550025, PR China
| | - Jing Han
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, 550025, PR China
| | - Zhe Yang
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, 550025, PR China
| | - Yanping Yang
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, 550025, PR China
| | - Yan Hong
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou, 550025, PR China.
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Kang JH, Kim HS, Park SH, Kim YS, Bae Y. WKYMVm ameliorates obesity by improving lipid metabolism and leptin signalling. J Cell Mol Med 2023; 27:2782-2791. [PMID: 37603580 PMCID: PMC10494292 DOI: 10.1111/jcmm.17910] [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: 05/15/2023] [Revised: 07/24/2023] [Accepted: 08/07/2023] [Indexed: 08/23/2023] Open
Abstract
Obesity is a metabolic disorder that results from an imbalance of energy intake and consumption. As low-grade chronic inflammation caused by obesity can lead to various complications, it is important to develop effective treatments against obesity. In this study, we investigate the effects of WKYMVm, a strong anti-inflammatory agent, against obesity. Administration of WKYMVm into high fat diet (HFD)-induced obese mice significantly attenuated body weight gain, food intake and increased insulin sensitivity. HFD-induced hepatic steatosis and adipose tissue hypertrophy were also markedly ameliorated by WKYMVm. During the maturation of adipocytes, WKYMVm improves lipid metabolism by increasing lipolysis, adipogenesis, mitochondrial biogenesis and fat browning. WKYMVm administration also elicited a decrease in leptin levels, but an increase in leptin sensitivity via regulation of hypothalamic endoplasmic reticulum stress and the leptin receptor cascade. Taken together, our results show that WKYMVm ameliorates obesity by improving lipid metabolism and leptin signalling, suggesting that WKYMVm can be a useful molecule for the development of anti-obesity agents.
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Affiliation(s)
- Ji Hyeon Kang
- Department of Biological SciencesSungkyunkwan UniversitySuwonKorea
| | - Hyung Sik Kim
- Department of Biological SciencesSungkyunkwan UniversitySuwonKorea
- Present address:
Department of Target DiscoveryLG Life ScienceSeoulKorea
| | - Seon Hyang Park
- Department of Biological SciencesSungkyunkwan UniversitySuwonKorea
| | - Ye Seon Kim
- Department of Biological SciencesSungkyunkwan UniversitySuwonKorea
- Convergence Research Center for Energy and Environmental SciencesSungkyunkwan UniversitySuwonKorea
| | - Yoe‐Sik Bae
- Department of Biological SciencesSungkyunkwan UniversitySuwonKorea
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Bak ST, Haupt-Jorgensen M, Dudele A, Wegener G, Wang T, Nielsen AL, Lund S. The anti-inflammatory agent 5-ASA reduces the level of specific tsRNAs in sperm cells of high-fat fed C57BL/6J mouse sires and improves glucose tolerance in female offspring. J Diabetes Complications 2023; 37:108563. [PMID: 37499293 DOI: 10.1016/j.jdiacomp.2023.108563] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 06/28/2023] [Accepted: 07/20/2023] [Indexed: 07/29/2023]
Abstract
INTRODUCTION The prevalence of obesity and associated comorbidities have increased to epidemic proportions globally. Paternal obesity is an independent risk factor for developing obesity and type 2 diabetes in the following generation, and growing evidence suggests epigenetic inheritance as a mechanism for this predisposition. How and why obesity induces epigenetic changes in sperm cells remain to be clarified in detail. Yet, recent studies show that alterations in sperm content of transfer RNA-derived small RNAs (tsRNAs) can transmit the effects of paternal obesity to offspring. Obesity is closely associated with low-grade chronic inflammation. Thus, we evaluated whether the anti-inflammatory agent 5-aminosalicylic acid (5-ASA) could intervene in the transmission of epigenetic inheritance of paternal obesity by reducing the inflammatory state in obese fathers. METHODS Male C57BL/6JBomTac mice were either fed a high-fat diet or a high-fat diet with 5-ASA for ten weeks before mating. The offspring metabolic phenotype was evaluated, and spermatozoa from sires were isolated for assessment of specific tsRNAs levels. RESULTS 5-ASA intervention reduced the levels of Glu-CTC tsRNAs in sperm cells and improved glucose tolerance in female offspring fed a chow diet. Paternal high-fat diet-induced obesity per se had only a moderate impact on the metabolic phenotype of both male and female offspring in our setting. CONCLUSION The results indicate that the low-grade inflammatory response associated with obesity may be an important factor in epigenetic inheritance of paternal obesity.
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Affiliation(s)
| | - Martin Haupt-Jorgensen
- The Bartholin Institute, Department of Pathology, Rigshospitalet, 2200 Copenhagen N, Denmark.
| | - Anete Dudele
- Department of Clinical Medicine, Center of Functionally Integrative Neuroscience, Aarhus University, 8200 Aarhus, Denmark
| | - Gregers Wegener
- Department of Clinial Medicine, Translational Neuropsychiatry Unit, Aarhus University, 8000 Aarhus, Denmark; Center of Excellence for Pharmaceutical Sciences, North-West University, Potchefstroom, South Africa
| | - Tobias Wang
- Department of Bioscience, Section for Zoophysiology, Aarhus University, 8000 Aarhus, Denmark
| | | | - Sten Lund
- Department of Internal Medicine and Endocrinology, Aarhus University Hospital, 8200 Aarhus N, Denmark; Steno Diabetes Center Aarhus, Aarhus University Hospital, 8200 Aarhus N, Denmark
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den Hartigh LJ, May KS, Zhang XS, Chait A, Blaser MJ. Serum amyloid A and metabolic disease: evidence for a critical role in chronic inflammatory conditions. Front Cardiovasc Med 2023; 10:1197432. [PMID: 37396595 PMCID: PMC10311072 DOI: 10.3389/fcvm.2023.1197432] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 05/15/2023] [Indexed: 07/04/2023] Open
Abstract
Serum amyloid A (SAA) subtypes 1-3 are well-described acute phase reactants that are elevated in acute inflammatory conditions such as infection, tissue injury, and trauma, while SAA4 is constitutively expressed. SAA subtypes also have been implicated as playing roles in chronic metabolic diseases including obesity, diabetes, and cardiovascular disease, and possibly in autoimmune diseases such as systemic lupus erythematosis, rheumatoid arthritis, and inflammatory bowel disease. Distinctions between the expression kinetics of SAA in acute inflammatory responses and chronic disease states suggest the potential for differentiating SAA functions. Although circulating SAA levels can rise up to 1,000-fold during an acute inflammatory event, elevations are more modest (∼5-fold) in chronic metabolic conditions. The majority of acute-phase SAA derives from the liver, while in chronic inflammatory conditions SAA also derives from adipose tissue, the intestine, and elsewhere. In this review, roles for SAA subtypes in chronic metabolic disease states are contrasted to current knowledge about acute phase SAA. Investigations show distinct differences between SAA expression and function in human and animal models of metabolic disease, as well as sexual dimorphism of SAA subtype responses.
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Affiliation(s)
- Laura J. den Hartigh
- Department of Medicine, Division of Metabolism, Endocrinology, and Nutrition, University of Washington, Seattle, WA, United States
- Diabetes Institute, University of Washington, Seattle, WA, United States
| | - Karolline S. May
- Department of Medicine, Division of Metabolism, Endocrinology, and Nutrition, University of Washington, Seattle, WA, United States
- Diabetes Institute, University of Washington, Seattle, WA, United States
| | - Xue-Song Zhang
- Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ, United States
| | - Alan Chait
- Department of Medicine, Division of Metabolism, Endocrinology, and Nutrition, University of Washington, Seattle, WA, United States
- Diabetes Institute, University of Washington, Seattle, WA, United States
| | - Martin J. Blaser
- Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ, United States
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Speelman T, Dale L, Louw A, Verhoog NJD. The Association of Acute Phase Proteins in Stress and Inflammation-Induced T2D. Cells 2022; 11:2163. [PMID: 35883605 PMCID: PMC9321356 DOI: 10.3390/cells11142163] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/02/2022] [Accepted: 07/04/2022] [Indexed: 02/06/2023] Open
Abstract
Acute phase proteins (APPs), such as plasminogen activator inhibitor-1 (PAI-1), serum amyloid A (SAA), and C-reactive protein (CRP), are elevated in type-2 diabetes (T2D) and are routinely used as biomarkers for this disease. These APPs are regulated by the peripheral mediators of stress (i.e., endogenous glucocorticoids (GCs)) and inflammation (i.e., pro-inflammatory cytokines), with both implicated in the development of insulin resistance, the main risk factor for the development of T2D. In this review we propose that APPs, PAI-1, SAA, and CRP, could be the causative rather than only a correlative link between the physiological elements of risk (stress and inflammation) and the development of insulin resistance.
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Affiliation(s)
| | | | | | - Nicolette J. D. Verhoog
- Biochemistry Department, Stellenbosch University, Van der Byl Street, Stellenbosch 7200, South Africa; (T.S.); (L.D.); (A.L.)
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Serum Amyloid A is not obligatory for high-fat, high-sucrose, cholesterol-fed diet-induced obesity and its metabolic and inflammatory complications. PLoS One 2022; 17:e0266688. [PMID: 35436297 PMCID: PMC9015120 DOI: 10.1371/journal.pone.0266688] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 03/24/2022] [Indexed: 12/26/2022] Open
Abstract
Several studies in the past have reported positive correlations between circulating Serum amyloid A (SAA) levels and obesity. However, based on limited number of studies involving appropriate mouse models, the role of SAA in the development of obesity and obesity-related metabolic consequences has not been established. Accordingly, herein, we have examined the role of SAA in the development of obesity and its associated metabolic complications in vivo using mice deficient for all three inducible forms of SAA: SAA1.1, SAA2.1 and SAA3 (TKO). Male and female mice were rendered obese by feeding a high fat, high sucrose diet with added cholesterol (HFHSC) and control mice were fed rodent chow diet. Here, we show that the deletion of SAA does not affect diet-induced obesity, hepatic lipid metabolism or adipose tissue inflammation. However, there was a modest effect on glucose metabolism. The results of this study confirm previous findings that SAA levels are elevated in adipose tissues as well as in the circulation in diet-induced obese mice. However, the three acute phase SAAs do not play a causative role in the development of obesity or obesity-associated adipose tissue inflammation and dyslipidemia.
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Acute Inflammation Is a Predisposing Factor for Weight Gain and Insulin Resistance. Pharmaceutics 2022; 14:pharmaceutics14030623. [PMID: 35335996 PMCID: PMC8954490 DOI: 10.3390/pharmaceutics14030623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/04/2022] [Accepted: 03/08/2022] [Indexed: 01/08/2023] Open
Abstract
In the course of infection and intense endotoxemia processes, induction of a catabolic state leading to weight loss is observed in mice and humans. However, the late effects of acute inflammation on energy homeostasis, regulation of body weight and glucose metabolism are yet to be elucidated. Here, we addressed whether serial intense endotoxemia, characterized by an acute phase response and weight loss, could be an aggravating or predisposing factor to weight gain and associated metabolic complications. Male Swiss Webster mice were submitted to 8 consecutive doses of lipopolysaccharide (10 mg/kg LPS), followed by 10 weeks on a high-fat diet (HFD). LPS-treated mice did not show changes in weight when fed standard chow. However, when challenged by a high-fat diet, LPS-treated mice showed greater weight gain, with larger fat depot areas, increased serum leptin and insulin levels and impaired insulin sensitivity when compared to mice on HFD only. Acute endotoxemia caused a long-lasting increase in mRNA expression of inflammatory markers such as TLR-4, CD14 and serum amyloid A (SAA) in the adipose tissue, which may represent the key factors connecting inflammation to increased susceptibility to weight gain and impaired glucose homeostasis. In an independent experimental model, and using publicly available microarray data from adipose tissue from mice infected with Gram-negative bacteria, we performed gene set enrichment analysis and confirmed upregulation of a set of genes responsible for cell proliferation and inflammation, including TLR-4 and SAA. Together, we showed that conditions leading to intense and recurring endotoxemia, such as common childhood bacterial infections, may resound for a long time and aggravate the effects of a western diet. If confirmed in humans, infections should be considered an additional factor contributing to obesity and type 2 diabetes epidemics.
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Jiang B, Wang D, Hu Y, Li W, Liu F, Zhu X, Li X, Zhang H, Bai H, Yang Q, Yang X, Ben J, Chen Q. Serum Amyloid A1 Exacerbates Hepatic Steatosis via TLR4 Mediated NF-κB Signaling Pathway. Mol Metab 2022; 59:101462. [PMID: 35247611 PMCID: PMC8938331 DOI: 10.1016/j.molmet.2022.101462] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 02/10/2022] [Accepted: 02/10/2022] [Indexed: 11/29/2022] Open
Abstract
Objective Chronic inflammatory response plays a prominent role in obesity-related nonalcoholic fatty liver disease (NAFLD). However, the intrahepatic triggering mechanism of inflammation remains obscure. This study aimed to elucidate the role of serum amyloid A1 (SAA1), an acute-phase response protein, in the obesity-induced hepatic inflammation and NAFLD. Methods Male mice were fed a high fat diet (HFD) for 16 weeks, and insulin resistance, hepatic steatosis, and inflammation in mice were monitored. Murine SAA1/2 was genetically manipulated to investigate the role of SAA1 in NAFLD. Results We found that SAA1 was increased in the NAFLD liver in both humans and mice. Knockout of SAA1/2 or knockdown of hepatic SAA1/2 promoted energy expenditure and alleviated HFD-induced metabolic disorder, hepatic steatosis, and inflammation. Endogenous overexpression of SAA1 in hepatocytes by adeno-associated virus 8 (AAV8) transfection aggravated overnutrition-associated gain of body weight, insulin resistance, hepatic lipid accumulation, and liver injury, which were markedly alleviated by knockout of murine toll-like receptor 4 (TLR4). Mechanistically, SAA1 directly bound with TLR4/myeloid differentiation 2 (MD2) to induce TLR4 internalization, leading to the activation of nuclear factor (NF)-κB signaling and production of both SAA1 and other inflammatory cytokines, including interleukin (IL)-6 and C–C chemokine ligand (CCL2) in hepatocytes. Administration of HFD mice with an AAV8-shRNA-SAA1/2 showed a therapeutic effect on hepatic inflammation and NAFLD progression. Conclusions These results demonstrate that SAA1 triggers hepatic steatosis and intrahepatic inflammatory response by forming a SAA1/TLR4/NF-κB/SAA1 feedforward regulatory circuit, which, in turn, leads to NAFLD progression. SAA1 may act as a potential target for the disease intervention. SAA1/2 deficiency alleviates HFD-induced hepatic steatosis and inflammation in mice. SAA1 aggravating overnutrition-associated hepatic steatosis and inflammation is dependent on TLR4. SAA1 directly binds to TLR4/MD2 to induce TLR4 internalization, leading to the activation of NF-κB signaling . SAA1/TLR4/NF-κB/SAA1 positive feedback in hepatocytes may be a potential target for obesity associated NAFLD.
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Affiliation(s)
- Bin Jiang
- Department of Pathophysiology, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing, China
| | - Dongdong Wang
- Department of Pathophysiology, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing, China
| | - Yunfu Hu
- Department of Pathophysiology, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing, China
| | - Wenxuan Li
- Department of Pathophysiology, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing, China
| | - Fengjiang Liu
- Innovative Center for Pathogen Research, Guangzhou Laboratory, Guangzhou, China
| | - Xudong Zhu
- Department of Pathophysiology, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing, China
| | - Xiaoyu Li
- Department of Pathophysiology, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing, China
| | - Hanwen Zhang
- Department of Pathophysiology, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing, China
| | - Hui Bai
- Department of Pathophysiology, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing, China
| | - Qing Yang
- Department of Pathophysiology, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing, China
| | - Xiuna Yang
- Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China.
| | - Jingjing Ben
- Department of Pathophysiology, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing, China.
| | - Qi Chen
- Department of Pathophysiology, Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing, China.
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Zhu Q, Yao Y, Xu L, Wu H, Wang W, He Y, Wang Y, Lu Y, Qi J, Ding Y, Li X, Huang J, Zhao H, Du Y, Sun K, Sun Y. Elevated SAA1 promotes the development of insulin resistance in ovarian granulosa cells in polycystic ovary syndrome. Reprod Biol Endocrinol 2022; 20:4. [PMID: 34980155 PMCID: PMC8721971 DOI: 10.1186/s12958-021-00873-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/06/2021] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Insulin resistance (IR) contributes to ovarian dysfunctions in polycystic ovarian syndrome (PCOS) patients. Serum amyloid A1 (SAA1) is an acute phase protein produced primarily by the liver in response to inflammation. In addition to its role in inflammation, SAA1 may participate in IR development in peripheral tissues. Yet, expressional regulation of SAA1 in the ovary and its role in the pathogenesis of ovarian IR in PCOS remain elusive. METHODS Follicular fluid, granulosa cells and peripheral venous blood were collected from PCOS and non-PCOS patients with and without IR to measure SAA1 abundance for analysis of its correlation with IR status. The effects of SAA1 on its own expression and insulin signaling pathway were investigated in cultured primary granulosa cells. RESULTS Ovarian granulosa cells were capable of producing SAA1, which could be induced by SAA1 per se. Moreover, the abundance of SAA1 significantly increased in granulosa cells and follicular fluid in PCOS patients with IR. SAA1 treatment significantly attenuated insulin-stimulated membrane translocation of glucose transporter 4 and glucose uptake in granulosa cells through induction of phosphatase and tensin homolog deleted on chromosome 10 (PTEN) expression with subsequent inhibition of Akt phosphorylation. These effects of SAA1 could be blocked by inhibitors for toll-like receptors 2/4 (TLR 2/4) and nuclear factor kappa light chain enhancer of activated B (NF-κB). CONCLUSIONS Human granulosa cells are capable of feedforward production of SAA1, which significantly increased in PCOS patients with IR. Excessive SAA1 reduces insulin sensitivity in granulosa cells via induction of PTEN and subsequent inhibition of Akt phosphorylation upon activation of TLR2/4 and NF-κB pathway. These findings highlight that elevation of SAA1 in the ovary promotes the development of IR in granulosa cells of PCOS patients.
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Affiliation(s)
- Qinling Zhu
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Yue Yao
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Lizhen Xu
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Hasiximuke Wu
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Wangsheng Wang
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Yaqiong He
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Yuan Wang
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Yao Lu
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Jia Qi
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Ying Ding
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Xinyu Li
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Jiaan Huang
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Hanting Zhao
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Yanzhi Du
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China
| | - Kang Sun
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China.
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China.
| | - Yun Sun
- Center for Reproductive Medicine, Ren ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200135, People's Republic of China.
- Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, 200135, People's Republic of China.
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Ren Y, Zhao H, Yin C, Lan X, Wu L, Du X, Griffiths HR, Gao D. Adipokines, Hepatokines and Myokines: Focus on Their Role and Molecular Mechanisms in Adipose Tissue Inflammation. Front Endocrinol (Lausanne) 2022; 13:873699. [PMID: 35909571 PMCID: PMC9329830 DOI: 10.3389/fendo.2022.873699] [Citation(s) in RCA: 51] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 06/17/2022] [Indexed: 11/18/2022] Open
Abstract
Chronic low-grade inflammation in adipose tissue (AT) is a hallmark of obesity and contributes to various metabolic disorders, such as type 2 diabetes and cardiovascular diseases. Inflammation in ATs is characterized by macrophage infiltration and the activation of inflammatory pathways mediated by NF-κB, JNK, and NLRP3 inflammasomes. Adipokines, hepatokines and myokines - proteins secreted from AT, the liver and skeletal muscle play regulatory roles in AT inflammation via endocrine, paracrine, and autocrine pathways. For example, obesity is associated with elevated levels of pro-inflammatory adipokines (e.g., leptin, resistin, chemerin, progranulin, RBP4, WISP1, FABP4, PAI-1, Follistatin-like1, MCP-1, SPARC, SPARCL1, and SAA) and reduced levels of anti-inflammatory adipokines such as adiponectin, omentin, ZAG, SFRP5, CTRP3, vaspin, and IL-10. Moreover, some hepatokines (Fetuin A, DPP4, FGF21, GDF15, and MANF) and myokines (irisin, IL-6, and DEL-1) also play pro- or anti-inflammatory roles in AT inflammation. This review aims to provide an updated understanding of these organokines and their role in AT inflammation and related metabolic abnormalities. It serves to highlight the molecular mechanisms underlying the effects of these organokines and their clinical significance. Insights into the roles and mechanisms of these organokines could provide novel and potential therapeutic targets for obesity-induced inflammation.
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Affiliation(s)
- Yakun Ren
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
| | - Hao Zhao
- School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Chunyan Yin
- Department of Pediatrics, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Xi Lan
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Litao Wu
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Xiaojuan Du
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Helen R. Griffiths
- Swansea University Medical School, Swansea University, Swansea, United Kingdom
| | - Dan Gao
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Center, Xi’an, China
- *Correspondence: Dan Gao,
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11
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Akl EM, Halim WAA. Serum level of serum amyloid A1 protein in patients with acne vulgaris. J Cosmet Dermatol 2021; 21:2597-2601. [PMID: 34449969 DOI: 10.1111/jocd.14405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 08/12/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The serum amyloid A1 (SAA1) protein is involved in many pathological diseases. The increased secretion of SAA1 can maintain inflammatory conditions. Acne vulgaris (AV) is a chronic inflammatory disease of pilosebaceous glands and may be associated with systemic manifestations. AIM OF THE WORK This study aimed to evaluate the serum level of SAA1 in patients with AV. SUBJECTS AND METHODS 120 participants were included in this study: 60 patients with AV and 60 apparently healthy volunteers as a control group. These participants were subjected to dermatological examination and assessments of lipid profile, fasting blood glucose (FBG), and serum SAA1. RESULTS Both serum SAA1 and FBG are significantly elevated in patients with AV than control (p < 0.0001 and p < 0.001, respectively). Furthermore, there are positive correlations between AV severity and SAA1 and FBG (p < 0.001 and p < 0.0001, respectively). CONCLUSIONS Serum amyloid A1 is increased in AV, and this elevation may play a role in the inflammatory milieu of AV.
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Affiliation(s)
- Essam Mohamed Akl
- Faculty of Medicine, Department of Dermatology, Venereology & Andrology, Benha University, Benha, Egypt
| | - Walid A Abdel Halim
- Faculty of Medicine, Department of Clinical and Chemical Pathology, Benha University, Benha, Egypt
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12
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Abouelasrar Salama S, Gouwy M, Van Damme J, Struyf S. The turning away of serum amyloid A biological activities and receptor usage. Immunology 2021; 163:115-127. [PMID: 33315264 PMCID: PMC8114209 DOI: 10.1111/imm.13295] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/24/2020] [Accepted: 12/04/2020] [Indexed: 12/21/2022] Open
Abstract
Serum amyloid A (SAA) is an acute-phase protein (APP) to which multiple immunological functions have been attributed. Regardless, the true biological role of SAA remains poorly understood. SAA is remarkably conserved in mammalian evolution, thereby suggesting an important biological function. Since its discovery in the 1970s, the majority of researchers have investigated SAA using recombinant forms made available through bacterial expression. Nevertheless, recent studies indicate that these recombinant forms of SAA are unreliable. Indeed, commercial SAA variants have been shown to be contaminated with bacterial products including lipopolysaccharides and lipoproteins. As such, biological activities and receptor usage (TLR2, TLR4) revealed through the use of commercial SAA variants may not reflect the inherent nature of this APP. Within this review, we discuss the biological effects of SAA that have been demonstrated through more solid experimental approaches. SAA takes part in the innate immune response via the recruitment of leucocytes and executes, through pathogen recognition, antimicrobial activity. Knockout animal models implicate SAA in a range of functions, such as regulation of T-cell-mediated responses and monopoiesis. Moreover, through its structural motifs, not only does SAA function as an extracellular matrix protein, but it also binds extracellular matrix proteins. Finally, we here also provide an overview of definite SAA receptor-mediated functions and highlight those that are yet to be validated. The role of FPR2 in SAA-mediated leucocyte recruitment has been confirmed; nevertheless, SAA has been linked to a range of other receptors including CD36, SR-BI/II, RAGE and P2RX7.
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Affiliation(s)
- Sara Abouelasrar Salama
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Mieke Gouwy
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Jo Van Damme
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Sofie Struyf
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
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13
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Serum amyloid A in polycystic ovary syndrome. Clin Chim Acta 2021; 518:151-155. [PMID: 33811926 DOI: 10.1016/j.cca.2021.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/21/2021] [Accepted: 03/29/2021] [Indexed: 11/21/2022]
Abstract
Polycystic ovary syndrome (PCOS), i.e., anovulation, hyperandrogenemia and polycystic ovary, is an endocrine-metabolic disease affecting reproductive aged women. Women with PCOS are likely to develop obesity, dyslipidemia, type 2 diabetes mellitus (T2DM) and cardiovascular diseases at a younger age. Despite high frequency and severe disease burden, the pathophysiological mechanisms of PCOS remain poorly defined and correspondingly have no therapeutic options. Emerging evidence has demonstrated that PCOS is accompanied with low-grade chronic inflammation and biomarkers thereof. Interestingly, serum amyloid A (SAA) has recently been identified as a potential marker of infection and inflammation and a number of studies have reported an association with PCOS. In this review, we explore the relationship between SAA and hyperandrogenemia, inflammation, obesity and insulin resistance, and provide convincing evidence for SAA as a potential inflammatory biomarker in PCOS.
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14
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Germ-Free Swiss Webster Mice on a High-Fat Diet Develop Obesity, Hyperglycemia, and Dyslipidemia. Microorganisms 2020; 8:microorganisms8040520. [PMID: 32260528 PMCID: PMC7232377 DOI: 10.3390/microorganisms8040520] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 03/23/2020] [Accepted: 04/03/2020] [Indexed: 12/14/2022] Open
Abstract
A calorie-dense diet is a well-established risk factor for obesity and metabolic syndrome (MetS), whereas the role of the intestinal microbiota (IMB) in the development of diet-induced obesity (DIO) is not completely understood. To test the hypothesis that Swiss Webster (Tac:SW) mice can develop characteristics of DIO and MetS in the absence of the IMB, we fed conventional (CV) and germ-free (GF) male Tac:SW mice either a low-fat diet (LFD; 10% fat derived calories) or a high-fat diet (HFD; 60% fat derived calories) for 10 weeks. The HFD increased feed conversion and body weight in GF mice independent of the increase associated with the microbiota in CV mice. In contrast to CV mice, GF mice did not decrease feed intake on the HFD and possessed heavier fat pads. The HFD caused hyperglycemia, hyperinsulinemia, and impaired glucose absorption in GF mice independent of the increase associated with the microbiota in CV mice. A HFD also elevated plasma LDL-cholesterol and increased hepatic triacylglycerol, free fatty acids, and ceramides in all mice, whereas hypertriglyceridemia and increased hepatic medium and long-chain acylcarnitines were only observed in CV mice. Therefore, GF male Tac:SW mice developed several detrimental effects of obesity and MetS from a high-fat, calorie dense diet.
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15
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Chen X, Zhuo S, Zhu T, Yao P, Yang M, Mei H, Li N, Ma F, Wang JM, Chen S, Ye RD, Li Y, Le Y. Fpr2 Deficiency Alleviates Diet-Induced Insulin Resistance Through Reducing Body Weight Gain and Inhibiting Inflammation Mediated by Macrophage Chemotaxis and M1 Polarization. Diabetes 2019; 68:1130-1142. [PMID: 30862681 PMCID: PMC6905484 DOI: 10.2337/db18-0469] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 02/17/2019] [Indexed: 12/15/2022]
Abstract
Obesity and related inflammation are critical for the pathogenesis of insulin resistance, but the underlying mechanisms are not fully understood. Formyl peptide receptor 2 (FPR2) plays important roles in host immune responses and inflammation-related diseases. We found that Fpr2 expression was elevated in the white adipose tissue of high-fat diet (HFD)-induced obese mice and db/db mice. The systemic deletion of Fpr2 alleviated HFD-induced obesity, insulin resistance, hyperglycemia, hyperlipidemia, and hepatic steatosis. Furthermore, Fpr2 deletion in HFD-fed mice elevated body temperature, reduced fat mass, and inhibited inflammation by reducing macrophage infiltration and M1 polarization in metabolic tissues. Bone marrow transplantations between wild-type and Fpr2-/- mice and myeloid-specific Fpr2 deletion demonstrated that Fpr2-expressing myeloid cells exacerbated HFD-induced obesity, insulin resistance, glucose/lipid metabolic disturbances, and inflammation. Mechanistic studies revealed that Fpr2 deletion in HFD-fed mice enhanced energy expenditure probably through increasing thermogenesis in skeletal muscle; serum amyloid A3 and other factors secreted by adipocytes induced macrophage chemotaxis via Fpr2; and Fpr2 deletion suppressed macrophage chemotaxis and lipopolysaccharide-, palmitate-, and interferon-γ-induced macrophage M1 polarization through blocking their signals. Altogether, our studies demonstrate that myeloid Fpr2 plays critical roles in obesity and related metabolic disorders via regulating muscle energy expenditure, macrophage chemotaxis, and M1 polarization.
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Affiliation(s)
- Xiaofang Chen
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Shu Zhuo
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Tengfei Zhu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Pengle Yao
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Mengmei Yang
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Hong Mei
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Na Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Fengguang Ma
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Ji Ming Wang
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD
| | - Shiting Chen
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Richard D Ye
- Institute of Chinese Medical Sciences, University of Macau, Macau Special Administrative Region, China
| | - Yu Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yingying Le
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
- Key Laboratory of Food Safety Risk Assessment, Ministry of Health, Beijing, China
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16
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Shang C, Sun W, Wang C, Wang X, Zhu H, Wang L, Yang H, Wang X, Gong F, Pan H. Comparative Proteomic Analysis of Visceral Adipose Tissue in Morbidly Obese and Normal Weight Chinese Women. Int J Endocrinol 2019; 2019:2302753. [PMID: 31929791 PMCID: PMC6935805 DOI: 10.1155/2019/2302753] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 08/26/2019] [Accepted: 10/01/2019] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE Visceral adipose tissue (VAT) plays a central role in the balance of energy metabolism. The objective of this study was to investigate the differentially expressed proteins in VAT between morbidly obese (BMI >35 kg/m2) and normal weight Chinese women. METHOD Nine morbidly obese women and 8 normal weight women as controls were enrolled. Abdominal VAT was excised and analyzed by label-free one-dimensional liquid chromatography tandem mass spectrometry (1D-LC-MS/MS). Differentially expressed VAT proteins were further analyzed with Gene Ontology (GO) analysis and Ingenuity Pathway Analysis (IPA). Masson's trichrome staining and CD68 immunohistochemical staining of VAT were conducted in all subjects. RESULT A total of 124 differentially expressed proteins were found with a ≥2-fold difference. Forty-one proteins were upregulated, and 83 proteins were downregulated in obese individuals. These altered VAT proteins were involved in the attenuation of the liver X receptor/retinoid X receptor (LXR/RXR) signaling pathway and the activation of the acute-phase response process. Three proteins (ACSL1, HADH, and UCHL1) were validated by western blotting using the same set of VAT samples from 6 morbidly obese and 7 normal weight patients, and the results indicated that the magnitude and direction of the protein changes were in accordance with the proteomic analysis. Masson's trichrome staining and CD68 immunohistochemical staining demonstrated that there was much more collagen fiber deposition and CD68-positive macrophages in the VAT of morbidly obese patients, suggesting extensive fiber deposition and macrophage infiltration. CONCLUSION A number of differentially expressed proteins were identified in VAT between morbidly obese and normal weight Chinese females. These differential proteins could be potential candidates in addressing the role of VAT in the development of obesity.
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Affiliation(s)
- Chen Shang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - Wei Sun
- Core Facility of Instrument, Institute of Basic Medicine, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Chunlin Wang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - Xiangqing Wang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - Huijuan Zhu
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - Linjie Wang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - Hongbo Yang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - Xue Wang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - Fengying Gong
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
| | - Hui Pan
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100730, China
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Feng Z, Long W, Hao B, Ding D, Ma X, Zhao L, Pang X. A human stool-derived Bilophila wadsworthia strain caused systemic inflammation in specific-pathogen-free mice. Gut Pathog 2017; 9:59. [PMID: 29090023 PMCID: PMC5657053 DOI: 10.1186/s13099-017-0208-7] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 10/17/2017] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Bilophila wadsworthia is a major member of sulfidogenic bacteria in human gut, it was originally recovered from different clinical specimens of intra-abdominal infections and recently was reported potentially linked to different chronic metabolic disorders. However, there is still insufficient understanding on its detailed function and mechanism to date. METHODS A B. wadsworthia strain was isolated from fresh feces of a latent autoimmune diabetes in adults patient and we investigated its pathogenicity by oral administration to specific-pathogen-free mice. Tissue samples and serum were collected after sacrifice. Stool samples were collected at different time points to profile the gut microbiota. RESULTS Bilophila wadsworthia infection resulted in the reduction of body weight and fat mass, apparent hepatosplenomegaly and elevated serum inflammatory factors, including serum amyloid A and interleukin-6, while without significant change of the overall gut microbiota structure. CONCLUSIONS These results demonstrated that higher amount of B. wadsworthia caused systemic inflammatory response in SPF mice, which adds new evidence to the pathogenicity of this bacterium and implied its potential role to the chronic inflammation related metabolic diseases like diabetes.
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Affiliation(s)
- Zhou Feng
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240 China
| | - Wenmin Long
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240 China
| | - Binhan Hao
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240 China
| | - Ding Ding
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240 China
| | - Xiaoqing Ma
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240 China
| | - Liping Zhao
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240 China
| | - Xiaoyan Pang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240 China
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18
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Butyrate Reduces HFD-Induced Adipocyte Hypertrophy and Metabolic Risk Factors in Obese LDLr-/-.Leiden Mice. Nutrients 2017; 9:nu9070714. [PMID: 28686216 PMCID: PMC5537829 DOI: 10.3390/nu9070714] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 07/03/2017] [Accepted: 07/04/2017] [Indexed: 12/18/2022] Open
Abstract
Adipose tissue (AT) has a modulating role in obesity-induced metabolic complications like type 2 diabetes mellitus (T2DM) via the production of so-called adipokines such as leptin, adiponectin, and resistin. The adipokines are believed to influence other tissues and to affect insulin resistance, liver function, and to increase the risk of T2DM. In this study, we examined the impact of intervention with the short-chain fatty acid butyrate following a high-fat diet (HFD) on AT function and other metabolic risk factors associated with obesity and T2DM in mice during mid- and late life. In both mid- and late adulthood, butyrate reduced HFD-induced adipocyte hypertrophy and elevations in leptin levels, which were associated with body weight, and cholesterol and triglyceride levels. HFD feeding stimulated macrophage accumulation primarily in epididymal AT in both mid- and late life adult mice, which correlated with liver inflammation in late adulthood. In late-adult mice, butyrate diminished increased insulin levels, which were related to adipocyte size and macrophage content in epididymal AT. These results suggest that dietary butyrate supplementation is able to counteract HFD-induced detrimental changes in AT function and metabolic outcomes in late life. These changes underlie the obesity-induced elevated risk of T2DM, and therefore it is suggested that butyrate has potential to attenuate risk factors associated with obesity and T2DM.
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de Oliveira EM, Visniauskas B, Tufik S, Andersen ML, Chagas JR, Campa A. Serum Amyloid A Production Is Triggered by Sleep Deprivation in Mice and Humans: Is That the Link between Sleep Loss and Associated Comorbidities? Nutrients 2017; 9:nu9030311. [PMID: 28335560 PMCID: PMC5372974 DOI: 10.3390/nu9030311] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 03/07/2017] [Accepted: 03/16/2017] [Indexed: 01/26/2023] Open
Abstract
Serum amyloid A (SAA) was recently associated with metabolic endotoxemia, obesity and insulin resistance. Concurrently, insufficient sleep adversely affects metabolic health and is an independent predisposing factor for obesity and insulin resistance. In this study we investigated whether sleep loss modulates SAA production. The serum SAA concentration increased in C57BL/6 mice subjected to sleep restriction (SR) for 15 days or to paradoxical sleep deprivation (PSD) for 72 h. Sleep restriction also induced the upregulation of Saa1.1/Saa2.1 mRNA levels in the liver and Saa3 mRNA levels in adipose tissue. SAA levels returned to the basal range after 24 h in paradoxical sleep rebound (PSR). Metabolic endotoxemia was also a finding in SR. Increased plasma levels of SAA were also observed in healthy human volunteers subjected to two nights of total sleep deprivation (Total SD), returning to basal levels after one night of recovery. The observed increase in SAA levels may be part of the initial biochemical alterations caused by sleep deprivation, with potential to drive deleterious conditions such as metabolic endotoxemia and weight gain.
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Affiliation(s)
- Edson M de Oliveira
- Departamento de Análises Clínicas e Toxicológicas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580, São Paulo SP 05509-000, Brazil.
| | - Bruna Visniauskas
- Departamento de Psicobiologia, Universidade Federal de São Paulo, Rua Napoleão de Barros, 925, São Paulo SP 04024-002, Brazil.
| | - Sergio Tufik
- Departamento de Psicobiologia, Universidade Federal de São Paulo, Rua Napoleão de Barros, 925, São Paulo SP 04024-002, Brazil.
| | - Monica L Andersen
- Departamento de Psicobiologia, Universidade Federal de São Paulo, Rua Napoleão de Barros, 925, São Paulo SP 04024-002, Brazil.
| | - Jair R Chagas
- Departamento de Psicobiologia, Universidade Federal de São Paulo, Rua Napoleão de Barros, 925, São Paulo SP 04024-002, Brazil.
| | - Ana Campa
- Departamento de Análises Clínicas e Toxicológicas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580, São Paulo SP 05509-000, Brazil.
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