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Wang H, Ruan S, Wu Z, Yan Q, Chen Y, Cui J, Zhang Z, Huang S, Hou B, Zhang C. Prognostic significance of glucose-lipid metabolic index in pancreatic cancer patients with diabetes mellitus. Cancer Med 2024; 13:e7108. [PMID: 38523554 PMCID: PMC10961598 DOI: 10.1002/cam4.7108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 12/22/2023] [Accepted: 03/04/2024] [Indexed: 03/26/2024] Open
Abstract
BACKGROUND The incidence of pancreatic cancer (PC) is higher in diabetic patients due to disturbances in glucose and lipid metabolism caused by insulin resistance (IR). However, the effect of diabetes as well as IR on the prognosis of PC patients remains inconclusive. Our study aims to assess the impact of IR on the prognosis of PC patients with diabetes. METHODS We conducted a retrospective analysis of 172 PC patients with diabetes in our institute from 2015 to 2021. Prognostic assessment was performed using univariate/multifactorial analysis and survival analysis. The predictive efficacy of metabolic indices was compared using receiver operator characteristic (ROC) curve analysis. RESULTS One hundred twenty-one of 172 patients died during follow-up, with a median follow-up of 477 days and a median overall survival (OS) of 270 days. Survival analysis showed a significant difference in OS by IR related parameters, which were triglyceride-glucose index (TyG), triglyceride-glucose index-body mass index (TyG-BMI), and triglyceride/high-density lipoprotein cholesterol ratio (TG/HDL-c). The ROC curve indicated that TyG, TyG-BMI, and TG/HDL-c had prognostic efficacy for PC with diabetes. We next optimized TyG-BMI and obtained a new parameter, namely glucose-lipid metabolism index (GLMI), and the patients were classified into GLMI low group and high group based on the calculated cutoff value. The GLMI high group had higher TyG, TyG-BMI, TyG/HDL-c, BMI, TG, total cholesterol (TC), TC/HDL-c, fasting plasma glucose, CA199, and more advanced tumor stage compared to low group. Univariate and multivariate analyses showed that GLMI was an independent prognostic factor. Furthermore, the patients of GLMI high group had worse OS compared to low group and the ROC curves showed GLMI had better predictive ability than TyG and TyG-BMI. CONCLUSIONS IR is associated with the outcome of PC patients with diabetes and higher level of IR indicates worse prognosis. GLMI has a good predictive value for PC with diabetes.
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Affiliation(s)
- Hailiang Wang
- Department of General Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouChina
- Department of Hepatobiliary SurgeryWeihai Central Hospital, Qingdao UniversityWeihaiChina
- The Second School of Clinical MedicineSouthern Medical UniversityGuangzhouChina
| | - Shiye Ruan
- Department of General Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouChina
- The Second School of Clinical MedicineSouthern Medical UniversityGuangzhouChina
| | - Zelong Wu
- Department of General Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouChina
- The Second School of Clinical MedicineSouthern Medical UniversityGuangzhouChina
| | - Qian Yan
- Department of General Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouChina
- School of Medicine South China University of TechnologyGuangzhouChina
| | - Yubin Chen
- Department of General Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouChina
- School of Medicine South China University of TechnologyGuangzhouChina
| | - Jinwei Cui
- Department of General Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouChina
- School of Medicine South China University of TechnologyGuangzhouChina
| | - Zhongyan Zhang
- Department of General Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouChina
- The Second School of Clinical MedicineSouthern Medical UniversityGuangzhouChina
| | - Shanzhou Huang
- Department of General Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouChina
- The Second School of Clinical MedicineSouthern Medical UniversityGuangzhouChina
- School of Medicine South China University of TechnologyGuangzhouChina
| | - Baohua Hou
- Department of General Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouChina
- The Second School of Clinical MedicineSouthern Medical UniversityGuangzhouChina
- School of Medicine South China University of TechnologyGuangzhouChina
- Department of General SurgeryHeyuan People's HospitalHeyuanChina
| | - Chuanzhao Zhang
- Department of General Surgery, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouChina
- The Second School of Clinical MedicineSouthern Medical UniversityGuangzhouChina
- School of Medicine South China University of TechnologyGuangzhouChina
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Benedet PO, Safikhan NS, Pereira MJ, Lum BM, Botezelli JD, Kuo CH, Wu HL, Craddock BP, Miller WT, Eriksson JW, Yue JTY, Conway EM. CD248 promotes insulin resistance by binding to the insulin receptor and dampening its insulin-induced autophosphorylation. EBioMedicine 2024; 99:104906. [PMID: 38061240 PMCID: PMC10750038 DOI: 10.1016/j.ebiom.2023.104906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 11/24/2023] [Accepted: 11/25/2023] [Indexed: 12/29/2023] Open
Abstract
BACKGROUND In spite of new treatments, the incidence of type 2 diabetes (T2D) and its morbidities continue to rise. The key feature of T2D is resistance of adipose tissue and other organs to insulin. Approaches to overcome insulin resistance are limited due to a poor understanding of the mechanisms and inaccessibility of drugs to relevant intracellular targets. We previously showed in mice and humans that CD248, a pre/adipocyte cell surface glycoprotein, acts as an adipose tissue sensor that mediates the transition from healthy to unhealthy adipose, thus promoting insulin resistance. METHODS Molecular mechanisms by which CD248 regulates insulin signaling were explored using in vivo insulin clamp studies and biochemical analyses of cells/tissues from CD248 knockout (KO) and wild-type (WT) mice with diet-induced insulin resistance. Findings were validated with human adipose tissue specimens. FINDINGS Genetic deletion of CD248 in mice, overcame diet-induced insulin resistance with improvements in glucose uptake and lipolysis in white adipose tissue depots, effects paralleled by increased adipose/adipocyte GLUT4, phosphorylated AKT and GSK3β, and reduced ATGL. The insulin resistance of the WT mice could be attributed to direct interaction of the extracellular domains of CD248 and the insulin receptor (IR), with CD248 acting to block insulin binding to the IR. This resulted in dampened insulin-mediated autophosphorylation of the IR, with reduced downstream signaling/activation of intracellular events necessary for glucose and lipid homeostasis. INTERPRETATION Our discovery of a cell-surface CD248-IR complex that is accessible to pharmacologic intervention, opens research avenues toward development of new agents to prevent/reverse insulin resistance. FUNDING Funded by Canadian Institutes of Health Research (CIHR), Natural Sciences and Engineering Research Council of Canada (NSERC), Canada Foundations for Innovation (CFI), the Swedish Diabetes Foundation, Family Ernfors Foundation and Novo Nordisk Foundation.
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Affiliation(s)
- Patricia O Benedet
- Centre for Blood Research, Life Sciences Institute, Faculty of Medicine, University of British Columbia, Vancouver, Canada; Departments of Medicine and Pathology and Laboratory Medicine, Life Sciences Institute, Faculty of Medicine, University of British Columbia, Vancouver, Canada
| | - Nooshin S Safikhan
- Centre for Blood Research, Life Sciences Institute, Faculty of Medicine, University of British Columbia, Vancouver, Canada; Departments of Medicine and Pathology and Laboratory Medicine, Life Sciences Institute, Faculty of Medicine, University of British Columbia, Vancouver, Canada
| | - Maria J Pereira
- Department of Medical Sciences, Clinical Diabetology & Metabolism, Uppsala University, Sweden
| | - Bryan M Lum
- Department of Physiology, Alberta Diabetes Institute and Group on Molecular and Cell Biology of Lipids, University of Alberta, Canada
| | - José Diego Botezelli
- Centre for Blood Research, Life Sciences Institute, Faculty of Medicine, University of British Columbia, Vancouver, Canada; Departments of Medicine and Pathology and Laboratory Medicine, Life Sciences Institute, Faculty of Medicine, University of British Columbia, Vancouver, Canada
| | - Cheng-Hsiang Kuo
- International Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan
| | - Hua-Lin Wu
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Barbara P Craddock
- Department of Physiology and Biophysics, Stony Brook University, Stony Brook, NY, USA
| | - W Todd Miller
- Department of Physiology and Biophysics, Stony Brook University, Stony Brook, NY, USA; Veterans Affairs Medical Center, Northport, NY, USA
| | - Jan W Eriksson
- Department of Medical Sciences, Clinical Diabetology & Metabolism, Uppsala University, Sweden
| | - Jessica T Y Yue
- Department of Physiology, Alberta Diabetes Institute and Group on Molecular and Cell Biology of Lipids, University of Alberta, Canada
| | - Edward M Conway
- Centre for Blood Research, Life Sciences Institute, Faculty of Medicine, University of British Columbia, Vancouver, Canada; Departments of Medicine and Pathology and Laboratory Medicine, Life Sciences Institute, Faculty of Medicine, University of British Columbia, Vancouver, Canada.
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Li T, Ling J, Du X, Zhang S, Yang Y, Zhang L. Exploring the underlying mechanisms of fisetin in the treatment of hepatic insulin resistance via network pharmacology and in vitro validation. Nutr Metab (Lond) 2023; 20:51. [PMID: 37996895 PMCID: PMC10666360 DOI: 10.1186/s12986-023-00770-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 11/16/2023] [Indexed: 11/25/2023] Open
Abstract
OBJECTIVE To characterize potential mechanisms of fisetin on hepatic insulin resistance (IR) using network pharmacology and in vitro validation. METHODS Putative targets of fisetin were retrieved from the Traditional Chinese Medicine Systems Pharmacology database, whereas the potential genes of hepatic IR were obtained from GeneCards database. A protein-protein interaction (PPI) network was constructed according to the intersection targets of fisetin and hepatic IR using the Venn diagram. The biological functions and potential pathways related to genes were determined using Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses. Cell experiments were also conducted to further verify the mechanism of fisetin on hepatic IR. RESULTS A total of 118 potential targets from fisetin were associated with hepatic IR. The areas of nodes and corresponding degree values of TP53, AKT1, TNF, IL6, CASP3, CTNNB1, JUN, SRC, epidermal growth factor receptor (EGFR), and HSP90AA1 were larger and could be easily found in the PPI network. Furthermore, GO analysis revealed that these key targets were significantly involved in multiple biological processes that participated in oxidative stress and serine/threonine kinase activity. KEGG enrichment analysis showed that the PI3K/AKT signaling pathway was a significant pathway involved in hepatic IR. Our in vitro results demonstrated that fisetin treatment increased the expressions of EGFR and IRS in HepG2 and L02 cells under normal or IR conditions. Western blot results revealed that p-AKT/AKT levels were significantly up-regulated, suggesting that fisetin was involved in the PI3K/AKT signaling pathway to regulate insulin signaling. CONCLUSION We explored the pharmacological actions and the potential molecular mechanism of fisetin in treating hepatic IR from a holistic perspective. Our study lays a theoretical foundation for the development of fisetin for type 2 diabetes.
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Affiliation(s)
- Tian Li
- Metabilic Vascular Disease Key Laboratory of Sichuan Province, Luzhou, 646000, China
- Drug Discovery Research Center, Southwest Medical University, Luzhou, 646000, China
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610000, China
| | - Junjun Ling
- Affiliated Hospital of Guizhou Medical University, Guiyang, 550000, China
| | - Xingrong Du
- Metabilic Vascular Disease Key Laboratory of Sichuan Province, Luzhou, 646000, China
- Drug Discovery Research Center, Southwest Medical University, Luzhou, 646000, China
| | - Siyu Zhang
- Drug Discovery Research Center, Southwest Medical University, Luzhou, 646000, China
| | - Yan Yang
- Chongqing Tongnan NO.1 Middle School, Tongnan, 402660, China
| | - Liang Zhang
- Metabilic Vascular Disease Key Laboratory of Sichuan Province, Luzhou, 646000, China.
- Affiliated Hospital of Guizhou Medical University, Guiyang, 550000, China.
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Kolb H, Kempf K, Martin S. Insulin and aging - a disappointing relationship. Front Endocrinol (Lausanne) 2023; 14:1261298. [PMID: 37854186 PMCID: PMC10579801 DOI: 10.3389/fendo.2023.1261298] [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: 07/25/2023] [Accepted: 08/25/2023] [Indexed: 10/20/2023] Open
Abstract
Experimental studies in animal models of aging such as nematodes, fruit flies or mice have observed that decreased levels of insulin or insulin signaling promotes longevity. In humans, hyperinsulinemia and concomitant insulin resistance are associated with an elevated risk of age-related diseases suggestive of a shortened healthspan. Age-related disorders include neurodegenerative diseases, hypertension, cardiovascular disease, and type 2 diabetes. High ambient insulin concentrations promote increased lipogenesis and fat storage, heightened protein synthesis and accumulation of non-functional polypeptides due to limited turnover capacity. Moreover, there is impaired autophagy activity, and less endothelial NO synthase activity. These changes are associated with mitochondrial dysfunction and oxidative stress. The cellular stress induced by anabolic activity of insulin initiates an adaptive response aiming at maintaining homeostasis, characterized by activation of the transcription factor Nrf2, of AMP activated kinase, and an unfolded protein response. This protective response is more potent in the long-lived human species than in short-lived models of aging research resulting in a stronger pro-aging impact of insulin in nematodes and fruit flies. In humans, resistance to insulin-induced cell stress decreases with age, because of an increase of insulin and insulin resistance levels but less Nrf2 activation. These detrimental changes might be contained by adopting a lifestyle that promotes low insulin/insulin resistance levels and enhances an adaptive response to cellular stress, as observed with dietary restriction or exercise.
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Affiliation(s)
- Hubert Kolb
- Faculty of Medicine, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
- West-German Centre of Diabetes and Health, Düsseldorf Catholic Hospital Group, Düsseldorf, Germany
| | - Kerstin Kempf
- West-German Centre of Diabetes and Health, Düsseldorf Catholic Hospital Group, Düsseldorf, Germany
| | - Stephan Martin
- Faculty of Medicine, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
- West-German Centre of Diabetes and Health, Düsseldorf Catholic Hospital Group, Düsseldorf, Germany
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Elangeeb ME, Elfaki I, Elkhalifa MA, Adam KM, Alameen AO, Elfadl AK, Albalawi IA, Almasoudi KS, Almotairi R, Alsaedi BSO, Alhelali MH, Mir MM, Amle D, Mir R. In Silico Investigation of AKT2 Gene and Protein Abnormalities Reveals Potential Association with Insulin Resistance and Type 2 Diabetes. Curr Issues Mol Biol 2023; 45:7449-7475. [PMID: 37754255 PMCID: PMC10528407 DOI: 10.3390/cimb45090471] [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: 07/18/2023] [Revised: 08/12/2023] [Accepted: 08/24/2023] [Indexed: 09/28/2023] Open
Abstract
Type 2 diabetes (T2D) develops from insulin resistance (IR) and the dysfunction of pancreatic beta cells. The AKT2 protein is very important for the protein signaling pathway, and the non-synonymous SNP (nsSNPs) in AKT2 gene may be associated with T2D. nsSNPs can result in alterations in protein stability, enzymatic activity, or binding specificity. The objective of this study was to investigate the effect of nsSNPs on the AKT2 protein structure and function that may result in the induction of IR and T2D. The study identified 20 variants that were considered to be the most deleterious based on a range of analytical tools included (SIFT, PolyPhen2, Mut-pred, SNAP2, PANTHER, PhD-SNP, SNP&Go, MUpro, Cosurf, and I-Mut). Two mutations, p.A179T and p.L183Q, were selected for further investigation based on their location within the protein as determined by PyMol. The results indicated that mutations, p.A179T and p.L183Q alter the protein stability and functional characteristics, which could potentially affect its function. In order to conduct a more in-depth analysis of these effects, a molecular dynamics simulation was performed for wildtype AKT2 and the two mutants (p.A179T and p.L183Q). The simulation evaluated various parameters, including temperature, pressure, density, RMSD, RMSF, SASA, and Region, over a period of 100 ps. According to the simulation results, the wildtype AKT2 protein demonstrated higher stability in comparison to the mutant variants. The mutations p.A179T and p.L183Q were found to cause a reduction in both protein stability and functionality. These findings underscore the significance of the effects of nsSNPs (mutations p.A179T and p.L183Q) on the structure and function of AKT2 that may lead to IR and T2D. Nevertheless, they require further verifications in future protein functional, protein-protein interaction, and large-scale case-control studies. When verified, these results will help in the identification and stratification of individuals who are at risk of IR and T2D for the purpose of prevention and treatment.
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Affiliation(s)
- M. E. Elangeeb
- Department of Basic Medical Sciences, College of Applied Medical Sciences, University of Bisha, Bisha 61922, Saudi Arabia
| | - Imadeldin Elfaki
- Department of Biochemistry, Faculty of Science, University of Tabuk, Tabuk 47512, Saudi Arabia;
| | - M. A. Elkhalifa
- Department of Anatomy, Faculty of Medicine and Health Sciences, University of Bisha, Bisha 61922, Saudi Arabia;
| | - Khalid M. Adam
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, University of Bisha, Bisha 61922, Saudi Arabia;
| | - A. O. Alameen
- Department of Biomedical Science, Faculty of Veterinary Medicine, King Faisal University, Alahssa 31982, Saudi Arabia;
| | - Ahmed Kamaleldin Elfadl
- Veterinary Research Section, Ministry of Municipality, Doha P.O. Box 35081, Qatar;
- Department of Pathology, Faculty of Veterinary Medicine, University of Khartoum, Khartoum 11115, Sudan
| | | | - Kholoud S. Almasoudi
- Department of Medical Lab Technology, Prince Fahad Bin Sultan Chair for Biomedical Research, Faculty of Applied Medical Sciences, University of Tabuk, Tabuk 71491, Saudi Arabia; (K.S.A.); (R.A.)
| | - Reema Almotairi
- Department of Medical Lab Technology, Prince Fahad Bin Sultan Chair for Biomedical Research, Faculty of Applied Medical Sciences, University of Tabuk, Tabuk 71491, Saudi Arabia; (K.S.A.); (R.A.)
| | - Basim S. O. Alsaedi
- Department of Statistics, University of Tabuk, Tabuk 47512, Saudi Arabia; (B.S.O.A.); (M.H.A.)
| | - Marwan H. Alhelali
- Department of Statistics, University of Tabuk, Tabuk 47512, Saudi Arabia; (B.S.O.A.); (M.H.A.)
| | - Mohammad Muzaffar Mir
- Department of Basic Medical Sciences, College of Medicine, University of Bisha, Bisha 61922, Saudi Arabia;
| | - Dnyanesh Amle
- Department of Biochemistry, All India Institute of Medical Sciences, Nagpur 441108, India;
| | - Rashid Mir
- Department of Medical Lab Technology, Prince Fahad Bin Sultan Chair for Biomedical Research, Faculty of Applied Medical Sciences, University of Tabuk, Tabuk 71491, Saudi Arabia; (K.S.A.); (R.A.)
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Sun R, Jiang L, Chen W, Xu Y, Yi X, Zhong G. Azadirachtin exposure inhibit ovary development of Spodoptera litura (Lepidoptera: Noctuidae) by altering lipids metabolism event and inhibiting insulin signaling pathways. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 262:115151. [PMID: 37356396 DOI: 10.1016/j.ecoenv.2023.115151] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 06/13/2023] [Accepted: 06/15/2023] [Indexed: 06/27/2023]
Abstract
Lipids are main energy source for insects reproduction, which are becoming emerging target for pest management. Azadirachtin (AZA) is a multi-targeted and promising botanical insecticide, but its reproduction toxicity mechanism related to lipids metabolism is poorly understood. Here, we applied lipidomic and transcriptomic to provide a comprehensive resource for describing the effect of AZA on lipids remodeling in ovary of Spodoptera litura. The results showed that AZA exposure obviously altered the contents of 130 lipids subclasses (76 upregulated and 54 downregulated). In detail, AZA exposure changed the length and saturation degrees of fatty acyl chain of most glycerolipid, phospholipid and sphingolipid as well as the expression of genes related to biosynthesis of unsaturated fatty acids and fatty acids elongation. Besides, following the abnormal lipids metabolism, western blot analysis suggested that AZA induce insulin resistance-like phenotypes by inhibiting insulin receptor substrates (IRS) /PI3K/AKT pathway, which might be responsible for the ovary abnormalities of S. litura. Collectively, our study provided insights into the lipids metabolism event in S. litura underlying AZA exposure, these key metabolites and genes identified in this study would also provide important reference for pest control in future.
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Affiliation(s)
- Ranran Sun
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Liwei Jiang
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Wenlong Chen
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Yuanhao Xu
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Xin Yi
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China.
| | - Guohua Zhong
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China.
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Szukiewicz D. Molecular Mechanisms for the Vicious Cycle between Insulin Resistance and the Inflammatory Response in Obesity. Int J Mol Sci 2023; 24:9818. [PMID: 37372966 DOI: 10.3390/ijms24129818] [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: 05/12/2023] [Revised: 05/31/2023] [Accepted: 06/05/2023] [Indexed: 06/29/2023] Open
Abstract
The comprehensive anabolic effects of insulin throughout the body, in addition to the control of glycemia, include ensuring lipid homeostasis and anti-inflammatory modulation, especially in adipose tissue (AT). The prevalence of obesity, defined as a body mass index (BMI) ≥ 30 kg/m2, has been increasing worldwide on a pandemic scale with accompanying syndemic health problems, including glucose intolerance, insulin resistance (IR), and diabetes. Impaired tissue sensitivity to insulin or IR paradoxically leads to diseases with an inflammatory component despite hyperinsulinemia. Therefore, an excess of visceral AT in obesity initiates chronic low-grade inflammatory conditions that interfere with insulin signaling via insulin receptors (INSRs). Moreover, in response to IR, hyperglycemia itself stimulates a primarily defensive inflammatory response associated with the subsequent release of numerous inflammatory cytokines and a real threat of organ function deterioration. In this review, all components of this vicious cycle are characterized with particular emphasis on the interplay between insulin signaling and both the innate and adaptive immune responses related to obesity. Increased visceral AT accumulation in obesity should be considered the main environmental factor responsible for the disruption in the epigenetic regulatory mechanisms in the immune system, resulting in autoimmunity and inflammation.
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Affiliation(s)
- Dariusz Szukiewicz
- Department of Biophysics, Physiology & Pathophysiology, Faculty of Health Sciences, Medical University of Warsaw, 02-004 Warsaw, Poland
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