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Carey A, Camell CD. Protocol to examine murine visceral adipose tissue immune cells using fluorescence-based flow cytometry. STAR Protoc 2024; 5:103227. [PMID: 39126656 PMCID: PMC11456973 DOI: 10.1016/j.xpro.2024.103227] [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: 05/09/2024] [Revised: 06/26/2024] [Accepted: 07/05/2024] [Indexed: 08/12/2024] Open
Abstract
Adipose tissue immune cells are heterogeneous and dynamic, alter metabolism, and drive immune responses. Here, we present a protocol for assessment and characterization of murine adipose tissue immune cells using fluorescence-based flow cytometry and sorting into pure populations. We describe steps for isolation of the stromovascular fraction, antibody staining, and data collection by flow cytometry. We also discuss common issues and troubleshooting steps. For complete details on the use and execution of this protocol, please refer to Carey et al.1.
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Affiliation(s)
- Anna Carey
- Molecular Pharmacology and Therapeutics Graduate Program, Department of Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA; Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Christina D Camell
- Molecular Pharmacology and Therapeutics Graduate Program, Department of Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA; Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA.
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2
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Manning JE, Harris E, Mathieson H, Sorensen L, Luqmani R, McGettrick HM, Morgan AW, Young SP, Mackie SL. Polymyalgia rheumatica shows metabolomic alterations that are further altered by glucocorticoid treatment: Identification of metabolic correlates of fatigue. J Autoimmun 2024; 147:103260. [PMID: 38797046 DOI: 10.1016/j.jaut.2024.103260] [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: 01/10/2024] [Revised: 04/17/2024] [Accepted: 05/21/2024] [Indexed: 05/29/2024]
Abstract
OBJECTIVE In polymyalgia rheumatica (PMR), glucocorticoids (GCs) relieve pain and stiffness, but fatigue may persist. We aimed to explore the effect of disease, GCs and PMR symptoms in the metabolite signatures of peripheral blood from patients with PMR or the related disease, giant cell arteritis (GCA). METHODS Nuclear magnetic resonance spectroscopy was performed on serum from 40 patients with untreated PMR, 84 with new-onset confirmed GCA, and 53 with suspected GCA who later were clinically confirmed non-GCA, and 39 age-matched controls. Further samples from PMR patients were taken one and six months into glucocorticoid therapy to explore relationship of metabolites to persistent fatigue. 100 metabolites were identified using Chenomx and statistical analysis performed in SIMCA-P to examine the relationship between metabolic profiles and, disease, GC treatment or symptoms. RESULTS The metabolite signature of patients with PMR and GCA differed from that of age-matched non-inflammatory controls (R2 > 0.7). There was a smaller separation between patients with clinically confirmed GCA and those with suspected GCA who later were clinically confirmed non-GCA (R2 = 0.135). In PMR, metabolite signatures were further altered with glucocorticoid treatment (R2 = 0.42) but did not return to that seen in controls. Metabolites correlated with CRP, pain, stiffness, and fatigue (R2 ≥ 0.39). CRP, pain, and stiffness declined with treatment and were associated with 3-hydroxybutyrate and acetoacetate, but fatigue did not. Metabolites differentiated patients with high and low fatigue both before and after treatment (R2 > 0.9). Low serum glutamine was predictive of high fatigue at both time points (0.79-fold change). CONCLUSION PMR and GCA alter the metabolite signature. In PMR, this is further altered by glucocorticoid therapy. Treatment-induced metabolite changes were linked to measures of inflammation (CRP, pain and stiffness), but not to fatigue. Furthermore, metabolite signatures distinguished patients with high or low fatigue.
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Affiliation(s)
- Julia E Manning
- Institute for Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15-2TT, UK.
| | - Emma Harris
- School of Medicine, University of Leeds, Leeds, LS7 4SA, UK and School of Human and Health Sciences, University of Huddersfield, Huddersfield, UK.
| | - Hannah Mathieson
- School of Medicine, University of Leeds, Leeds, LS7 4SA, UK and Leeds NIHR Biomedical Research Centre, Leeds Teaching Hospitals NHS Trust, Leeds, UK.
| | - Louise Sorensen
- School of Medicine, University of Leeds, Leeds, LS7 4SA, UK.
| | - Raashid Luqmani
- NIHR Musculoskeletal Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Science, University of Oxford, Oxford, UK.
| | - Helen M McGettrick
- Institute for Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15-2TT, UK.
| | - Ann W Morgan
- School of Medicine, University of Leeds, Leeds, School of Human and Health Sciences, University of Huddersfield, Huddersfield, And Leeds NIHR Medtech and in Vitro Diagnostics Co-operative, Leeds Teaching Hospitals NHS Trust, Leeds, LS7 4SA, UK.
| | - Stephen P Young
- Institute for Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15-2TT, UK.
| | - Sarah L Mackie
- School of Medicine, University of Leeds, Leeds, LS7 4SA, UK and School of Human and Health Sciences, University of Huddersfield, Huddersfield, UK.
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3
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Kuroshima T, Kawaguchi S, Okada M. Current Perspectives of Mitochondria in Sepsis-Induced Cardiomyopathy. Int J Mol Sci 2024; 25:4710. [PMID: 38731929 PMCID: PMC11083471 DOI: 10.3390/ijms25094710] [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: 03/24/2024] [Revised: 04/19/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024] Open
Abstract
Sepsis-induced cardiomyopathy (SICM) is one of the leading indicators for poor prognosis associated with sepsis. Despite its reversibility, prognosis varies widely among patients. Mitochondria play a key role in cellular energy production by generating adenosine triphosphate (ATP), which is vital for myocardial energy metabolism. Over recent years, mounting evidence suggests that severe sepsis not only triggers mitochondrial structural abnormalities such as apoptosis, incomplete autophagy, and mitophagy in cardiomyocytes but also compromises their function, leading to ATP depletion. This metabolic disruption is recognized as a significant contributor to SICM, yet effective treatment options remain elusive. Sepsis cannot be effectively treated with inotropic drugs in failing myocardium due to excessive inflammatory factors that blunt β-adrenergic receptors. This review will share the recent knowledge on myocardial cell death in sepsis and its molecular mechanisms, focusing on the role of mitochondria as an important metabolic regulator of SICM, and discuss the potential for developing therapies for sepsis-induced myocardial injury.
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Affiliation(s)
| | | | - Motoi Okada
- Department of Emergency Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan; (T.K.); (S.K.)
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4
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Chirivi M, Contreras GA. Endotoxin-induced alterations of adipose tissue function: a pathway to bovine metabolic stress. J Anim Sci Biotechnol 2024; 15:53. [PMID: 38581064 PMCID: PMC10998405 DOI: 10.1186/s40104-024-01013-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 02/14/2024] [Indexed: 04/07/2024] Open
Abstract
During the periparturient period, dairy cows exhibit negative energy balance due to limited appetite and increased energy requirements for lactogenesis. The delicate equilibrium between energy availability and expenditure puts cows in a state of metabolic stress characterized by excessive lipolysis in white adipose tissues (AT), increased production of reactive oxygen species, and immune cell dysfunction. Metabolic stress, especially in AT, increases the risk for metabolic and inflammatory diseases. Around parturition, cows are also susceptible to endotoxemia. Bacterial-derived toxins cause endotoxemia by promoting inflammatory processes and immune cell infiltration in different organs and systems while impacting metabolic function by altering lipolysis, mitochondrial activity, and insulin sensitivity. In dairy cows, endotoxins enter the bloodstream after overcoming the defense mechanisms of the epithelial barriers, particularly during common periparturient conditions such as mastitis, metritis, and pneumonia, or after abrupt changes in the gut microbiome. In the bovine AT, endotoxins induce a pro-inflammatory response and stimulate lipolysis in AT, leading to the release of free fatty acids into the bloodstream. When excessive and protracted, endotoxin-induced lipolysis can impair adipocyte's insulin signaling pathways and lipid synthesis. Endotoxin exposure can also induce oxidative stress in AT through the production of reactive oxygen species by inflammatory cells and other cellular components. This review provides insights into endotoxins' impact on AT function, highlighting the gaps in our knowledge of the mechanisms underlying AT dysfunction, its connection with periparturient cows' disease risk, and the need to develop effective interventions to prevent and treat endotoxemia-related inflammatory conditions in dairy cattle.
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Affiliation(s)
- Miguel Chirivi
- Department of Large Animal Clinical Sciences, Michigan State University, East Lansing, MI, USA
| | - G Andres Contreras
- Department of Large Animal Clinical Sciences, Michigan State University, East Lansing, MI, USA.
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5
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Pedersen MGB, Rittig N, Bangshaab M, Berg-Hansen K, Gopalasingam N, Gormsen LC, Søndergaard E, Møller N. Effects of exogenous lactate on lipid, protein, and glucose metabolism-a randomized crossover trial in healthy males. Am J Physiol Endocrinol Metab 2024; 326:E443-E453. [PMID: 38324259 PMCID: PMC11193511 DOI: 10.1152/ajpendo.00301.2023] [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: 09/12/2023] [Revised: 01/18/2024] [Accepted: 02/01/2024] [Indexed: 02/08/2024]
Abstract
Lactate may inhibit lipolysis and thus enhance insulin sensitivity, but there is a lack of metabolic human studies. This study aimed to determine how hyperlactatemia affects lipolysis, glucose- and protein metabolism, and insulin sensitivity in healthy men. In a single-blind, randomized, crossover design, eight healthy men were studied after an overnight fast on two occasions: 1) during a sodium-lactate infusion (LAC) and 2) during a sodium-matched NaCl infusion (CTR). Both days consisted of a 3-h postabsorptive period followed by a 3-h hyperinsulinemic-euglycemic clamp (HEC). Lipolysis rate, endogenous glucose production (EGP), and delta glucose rate of disappearance (ΔRdglu) were evaluated using [9,10-3H]palmitate and [3-3H]glucose tracers. In addition, whole body- and forearm protein metabolism was assessed using [15N]phenylalanine, [2H4]tyrosine, [15N]tyrosine, and [13C]urea tracers. In the postabsorptive period, plasma lactate increased to 2.7 ± 0.5 mmol/L during LAC vs. 0.6 ± 0.3 mmol/L during CTR (P < 0.001). In the postabsorptive period, palmitate flux was 30% lower during LAC compared with CTR (84 ± 32 µmol/min vs. 120 ± 35 µmol/min, P = 0.003). During the HEC, palmitate flux was suppressed similarly during both interventions (P = 0.7). EGP, ΔRdglu, and M value were similar during LAC and CTR. During HEC, LAC increased whole body phenylalanine flux (P = 0.02) and protein synthesis (P = 0.03) compared with CTR; LAC did not affect forearm protein metabolism compared with CTR. Lactate infusion inhibited lipolysis by 30% under postabsorptive conditions but did not affect glucose metabolism or improve insulin sensitivity. In addition, whole body phenylalanine flux was increased. Clinical trial registrations: NCT04710875.NEW & NOTEWORTHY Lactate is a decisive intermediary metabolite, serving as an energy substrate and a signaling molecule. The present study examines the effects of lactate on substrate metabolism and insulin sensitivity in healthy males. Hyperlactatemia reduces lipolysis by 30% without affecting insulin sensitivity and glucose metabolism. In addition, hyperlactatemia increases whole body amino acid turnover rate.
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Affiliation(s)
- Mette G B Pedersen
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
- Medical Research Laboratory, Aarhus University, Aarhus, Denmark
| | - Nikolaj Rittig
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
- Medical Research Laboratory, Aarhus University, Aarhus, Denmark
| | - Maj Bangshaab
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
- Medical Research Laboratory, Aarhus University, Aarhus, Denmark
| | | | | | - Lars C Gormsen
- Department of Nuclear Medicine & PET Centre, Aarhus University Hospital, Aarhus, Denmark
| | - Esben Søndergaard
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
| | - Niels Møller
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
- Medical Research Laboratory, Aarhus University, Aarhus, Denmark
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Maleki MH, Abdizadeh Javazm S, Dastghaib S, Panji A, Hojjati Far M, Mahmoodi H, Siri M, Shafiee SM. The effect of quercetin on adipogenesis, lipolysis, and apoptosis in 3T3-L1 adipocytes: The role of SIRT1 pathways. Obes Sci Pract 2024; 10:e752. [PMID: 38618521 PMCID: PMC11015901 DOI: 10.1002/osp4.752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 03/28/2024] [Accepted: 04/03/2024] [Indexed: 04/16/2024] Open
Abstract
Background Lipotoxicity, caused by adipocyte triglyceride over-accumulation, contributes to obesity-related comorbidities such as hypertension, type 2 diabetes, coronary heart disease, respiratory dysfunction, and osteoarthritis. This study focuses on determining how sirtuin-1 (SIRT-1) mediates quercetin's (QCT) effect on 3T3-L1 adipocytes. Key aspects of this study include preventing adipogenesis, inducing lipolysis, and stimulating adipocyte apoptosis. Methods 3T3-L1 adipocytes underwent treatment with varying QCT doses, lipopolysaccharide (LPS), and the SIRT-1 inhibitor EX-527, followed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide [MTT] assay for cell viability assessment. Furthermore, quantitative real-time polymerase chain reaction measured mRNA expression levels of adipogenesis markers (fatty acid synthase [FASN] and peroxisome proliferator-activated receptor gamma [PPARγ]), lipolysis markers (adipose triglyceride lipase [ATGL] and hormone-sensitive lipase [HSL]), and apoptosis markers (B-cell lymphoma2 [Bcl-2], Bcl-2 Associated -X-protein [BAX] and Caspase-3). Results The data showed that LPS + QCT significantly reduced cell viability in a dose- and time-dependent manner, unaffected by LPS + QCT + EX-527. Treatment with LPS + QCT did not affect FASN and PPARγ expression but significantly increased ATGL and HSL mRNA expression compared with LPS alone. Interestingly, EX-527 reversed the effects of LPS + QCT on lipogenesis and lipolysis markers completely. QCT enhanced apoptosis in a SIRT-1 independent pattern. Conclusion The data suggest that QCT suppresses adipogenesis while increasing lipolysis via SIRT-1. However, QCT's effects on apoptosis appear to be independent of SIRT-1. These findings provide further evidence for QCT's effects on adipocytes, particularly its interaction with SIRT-1.
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Affiliation(s)
- Mohammad Hasan Maleki
- Department of Clinical BiochemistrySchool of MedicineShiraz University of Medical SciencesShirazIran
| | - Sara Abdizadeh Javazm
- Department of MicrobiologyFaculty of SciencesKaraj BranchIslamic Azad UniversityKarajIran
| | - Sanaz Dastghaib
- Endocrinology and Metabolism Research CenterShiraz University of Medical ScienceShirazIran
- Autophagy Research CenterShiraz University of Medical SciencesShirazIran
| | - Anahita Panji
- Department of Plant Production and Genetic EngineeringFaculty of AgricultureLorestan UniversityKhorramabadIran
| | - Mohammad Hojjati Far
- Department of PhysiologySchool of MedicineShiraz University of Medical SciencesShirazIran
| | - Hajar Mahmoodi
- Department of MicrobiologyCollege of Science, Agriculture and Modern TechnologyShiraz BranchIslamic Azad UniversityShirazIran
| | - Morvarid Siri
- Autophagy Research CenterDepartment of Clinical BiochemistrySchool of MedicineShiraz University of Medical SciencesShirazIran
| | - Sayed Mohammad Shafiee
- Autophagy Research CenterDepartment of Clinical BiochemistrySchool of MedicineShiraz University of Medical SciencesShirazIran
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7
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Carey A, Nguyen K, Kandikonda P, Kruglov V, Bradley C, Dahlquist KJV, Cholensky S, Swanson W, Badovinac VP, Griffith TS, Camell CD. Age-associated accumulation of B cells promotes macrophage inflammation and inhibits lipolysis in adipose tissue during sepsis. Cell Rep 2024; 43:113967. [PMID: 38492219 PMCID: PMC11014686 DOI: 10.1016/j.celrep.2024.113967] [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: 09/26/2023] [Revised: 02/14/2024] [Accepted: 02/29/2024] [Indexed: 03/18/2024] Open
Abstract
Non-canonical lipolysis induced by inflammatory cytokines or Toll-like receptor ligands is required for the regulation of inflammation during endotoxemia and sepsis. Canonical lipolysis induced by catecholamines declines during aging due to factors including an expansion of lymphocytes, pro-inflammatory macrophage polarization, and an increase in chronic low-grade inflammation; however, the extent to which the non-canonical pathway of lipolysis is active and impacted by immune cells during aging remains unclear. Therefore, we aimed to define the extent to which immune cells from old mice influence non-canonical lipolysis during sepsis. We identified age-associated impairments of non-canonical lipolysis and an accumulation of dysfunctional B1 B cells in the visceral white adipose tissue (vWAT) of old mice. Lifelong deficiency of B cells results in restored non-canonical lipolysis and reductions in pro-inflammatory macrophage populations. Our study suggests that targeting the B cell-macrophage signaling axis may resolve metabolic dysfunction in aged vWAT and attenuate septic severity in older individuals.
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Affiliation(s)
- Anna Carey
- Molecular Pharmacology and Therapeutics Graduate Program, Department of Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA; Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Katie Nguyen
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Pranathi Kandikonda
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Victor Kruglov
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Claire Bradley
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Korbyn J V Dahlquist
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Stephanie Cholensky
- Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Whitney Swanson
- Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA; Department of Urology, University of Minnesota, Minneapolis, MN 55455, USA
| | | | - Thomas S Griffith
- Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA; Department of Urology, University of Minnesota, Minneapolis, MN 55455, USA; Minneapolis VA Health Care System, Minneapolis, MN 55417, USA
| | - Christina D Camell
- Molecular Pharmacology and Therapeutics Graduate Program, Department of Pharmacology, University of Minnesota, Minneapolis, MN 55455, USA; Institute on the Biology of Aging and Metabolism, Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA; Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA.
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8
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Lu X, Li G, Liu Y, Luo G, Ding S, Zhang T, Li N, Geng Q. The role of fatty acid metabolism in acute lung injury: a special focus on immunometabolism. Cell Mol Life Sci 2024; 81:120. [PMID: 38456906 PMCID: PMC10923746 DOI: 10.1007/s00018-024-05131-4] [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: 11/09/2023] [Revised: 01/06/2024] [Accepted: 01/17/2024] [Indexed: 03/09/2024]
Abstract
Reputable evidence from multiple studies suggests that excessive and uncontrolled inflammation plays an indispensable role in mediating, amplifying, and protracting acute lung injury (ALI). Traditionally, immunity and energy metabolism are regarded as separate functions regulated by distinct mechanisms, but recently, more and more evidence show that immunity and energy metabolism exhibit a strong interaction which has given rise to an emerging field of immunometabolism. Mammalian lungs are organs with active fatty acid metabolism, however, during ALI, inflammation and oxidative stress lead to a series metabolic reprogramming such as impaired fatty acid oxidation, increased expression of proteins involved in fatty acid uptake and transport, enhanced synthesis of fatty acids, and accumulation of lipid droplets. In addition, obesity represents a significant risk factor for ALI/ARDS. Thus, we have further elucidated the mechanisms of obesity exacerbating ALI from the perspective of fatty acid metabolism. To sum up, this paper presents a systematical review of the relationship between extensive fatty acid metabolic pathways and acute lung injury and summarizes recent advances in understanding the involvement of fatty acid metabolism-related pathways in ALI. We hold an optimistic believe that targeting fatty acid metabolism pathway is a promising lung protection strategy, but the specific regulatory mechanisms are way too complex, necessitating further extensive and in-depth investigations in future studies.
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Affiliation(s)
- Xiao Lu
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, 430060, China
| | - Guorui Li
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, 430060, China
| | - Yi Liu
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, 430060, China
| | - Guoqing Luo
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, 430060, China
| | - Song Ding
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, 430060, China
| | - Tianyu Zhang
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, 430060, China
| | - Ning Li
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, 430060, China.
| | - Qing Geng
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, 430060, China.
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Chen L, Li L, Cui D, Huang Y, Tong H, Zabihi H, Wang S, Qi Y, Lakowski T, Leng L, Liu S, Wu H, Young LH, Bucala R, Qi D. Extracellular macrophage migration inhibitory factor (MIF) downregulates adipose hormone-sensitive lipase (HSL) and contributes to obesity. Mol Metab 2024; 79:101834. [PMID: 37935315 PMCID: PMC10700858 DOI: 10.1016/j.molmet.2023.101834] [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: 08/15/2023] [Revised: 10/21/2023] [Accepted: 11/02/2023] [Indexed: 11/09/2023] Open
Abstract
Attenuation of adipose hormone sensitive lipase (HSL) may impair lipolysis and exacerbate obesity. We investigate the role of cytokine, macrophage migration inhibitory factor (MIF) in regulating adipose HSL and adipocyte hypertrophy. Extracellular MIF downregulates HSL in an autocrine fashion, by activating the AMPK/JNK signaling pathway upon binding to its membrane receptor, CD74. WT mice fed high fat diet (HFD), as well as mice overexpressing MIF, both had high circulating MIF levels and showed suppression of HSL during the development of obesity. Blocking the extracellular action of MIF by a neutralizing MIF antibody significantly reduced obesity in HFD mice. Interestingly, intracellular MIF binds with COP9 signalosome subunit 5 (Csn5) and JNK, which leads to an opposing effect to inhibit JNK phosphorylation. With global MIF deletion, adipocyte JNK phosphorylation increased, resulting in decreased HSL expression, suggesting that the loss of MIF's intracellular inhibitory action on JNK was dominant in Mif-/- mice. Adipose tissue from Mif-/- mice also exhibited higher Akt and lower PKA phosphorylation following HFD feeding compared with WT, which may contribute to the downregulation of HSL activation during more severe obesity. Both intracellular and extracellular MIF have opposing effects to regulate HSL, but extracellular actions predominate to downregulate HSL and exacerbate the development of obesity during HFD.
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Affiliation(s)
- Liujun Chen
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Lisha Li
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Donghong Cui
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yiheng Huang
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Haibin Tong
- College of Life and Environment Sciences, Wenzhou University, Wenzhou, Zhejiang, China
| | - Haleh Zabihi
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Shuxia Wang
- Department of Cardiology, The General Hospital of Chinese PLA, Beijing, China
| | - Yadan Qi
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Ted Lakowski
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Lin Leng
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Suixin Liu
- Division of Cardiac Rehabilitation, Department of Physical Medicine and Rehabilitation, Xiangya Hospital of Central South University, Changsha, China
| | - Hong Wu
- Institute of Cardiovascular Disease, Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Lawrence H Young
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Richard Bucala
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Dake Qi
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada; Division of Biomedical Sciences, Faculty of Medicine, Memorial University, St. John's, NL, Canada.
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10
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Chen J, Chen W, Wu L, Wang RH, Xiang JJ, Zheng FK, Huang QM. Causal relationships between plasma lipids and sepsis: A Mendelian randomization study. Medicine (Baltimore) 2023; 102:e36288. [PMID: 38065901 PMCID: PMC10713144 DOI: 10.1097/md.0000000000036288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 11/02/2023] [Indexed: 12/18/2023] Open
Abstract
Although observational studies have indicated that plasma lipids are associated with an increased risk of sepsis, due to confounders and reverse causality, the causal relationship remains unclear. This study was designed to assess the causal effects of plasma lipid levels on sepsis. We used a 2-sample Mendelian randomization (MR) method to evaluate the causal effect of plasma lipids on sepsis. MR analysis employs methods such as inverse variance weighted, MR-Egger regression, weighted median regression (WME), simple mode and weighted mode. The inverse variance weighted (IVW) method was predominantly utilized to assess causality. Heterogeneity was affirmed by Cochran Q test, while pleiotropy was corroborated by MR-Egger regression analysis. The robustness and reliability of the results were demonstrated through "leave-one-out" sensitivity analysis. Instrumental variables included 226 single-nucleotide polymorphisms (SNPs), comprising of 7 for triglyceride (TG), 169 for high-density lipoprotein cholesterol (HDL-C), and 50 for low-density lipoprotein cholesterol (LDL-C). The risk of sepsis appeared to increase with rising LDL-C levels, as indicated by the inverse variance weighted analysis (OR 1.11, 95% CI from0.99 to1.24, P = 0.068). However, no causality existed between LDL-C, HDL-C, TG and sepsis. Two-sample MR analysis indicated that increased LDL-C level is a risk factor for sepsis, while TG and HDL-C levels have protective effects against sepsis. However, no significant causal relationship was found between TG, HDL-C, and LDL-C levels and sepsis.
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Affiliation(s)
- Jing Chen
- The First Affiliated Hospital of Guangxi University of Traditional Chinese Medicine, Nanning, China
| | - Wei Chen
- The First Affiliated Hospital of Guangxi University of Traditional Chinese Medicine, Nanning, China
| | - Lin Wu
- Guangxi University of Chinese Medicine, Nanning, China
| | - Rong Hui Wang
- The First Affiliated Hospital of Guangxi University of Traditional Chinese Medicine, Nanning, China
| | - Jun Jun Xiang
- The First Affiliated Hospital of Guangxi University of Traditional Chinese Medicine, Nanning, China
| | - Fu Kui Zheng
- The First Affiliated Hospital of Guangxi University of Traditional Chinese Medicine, Nanning, China
| | - Qiao Ming Huang
- The First Affiliated Hospital of Guangxi University of Traditional Chinese Medicine, Nanning, China
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11
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Song J, Fang X, Zhou K, Bao H, Li L. Sepsis‑induced cardiac dysfunction and pathogenetic mechanisms (Review). Mol Med Rep 2023; 28:227. [PMID: 37859613 PMCID: PMC10619129 DOI: 10.3892/mmr.2023.13114] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 09/12/2023] [Indexed: 10/21/2023] Open
Abstract
Sepsis is a manifestation of the immune and inflammatory response to infection, which may lead to multi‑organ failure. Health care advances have improved outcomes in critical illness, but it still remains the leading cause of death. Septic cardiomyopathy is heart dysfunction brought on by sepsis. Septic cardiomyopathy is a common consequence of sepsis and has a mortality rate of up to 70%. There is a lack of understanding of septic cardiomyopathy pathogenesis; knowledge of its pathogenesis and the identification of potential therapeutic targets may reduce the mortality rate of patients with sepsis and lead to clinical improvements. The present review aimed to summarize advances in the pathogenesis of cardiac dysfunction in sepsis, with a focus on mitochondrial dysfunction, metabolic changes and cell death modalities and pathways. The present review summarized diagnostic criteria and outlook for sepsis treatment, with the goal of identifying appropriate treatment methods for this disease.
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Affiliation(s)
- Jiayu Song
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, Jilin 130117, P.R. China
| | - Xiaolei Fang
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, Jilin 130117, P.R. China
| | - Kaixuan Zhou
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, Jilin 130117, P.R. China
| | - Huiwei Bao
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, Jilin 130117, P.R. China
| | - Lijing Li
- Department of Pharmacy, Changchun University of Chinese Medicine, Changchun, Jilin 130117, P.R. China
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12
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Häussler S, Ghaffari MH, Seibt K, Sadri H, Alaedin M, Huber K, Frahm J, Dänicke S, Sauerwein H. Blood and liver telomere length, mitochondrial DNA copy number, and hepatic gene expression of mitochondrial dynamics in mid-lactation cows supplemented with l-carnitine under systemic inflammation. J Dairy Sci 2023; 106:9822-9842. [PMID: 37641324 DOI: 10.3168/jds.2023-23556] [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: 03/31/2023] [Accepted: 06/21/2023] [Indexed: 08/31/2023]
Abstract
The current study was conducted to examine the effect of l-carnitine (LC) supplementation on telomere length and mitochondrial DNA copy number (mtDNAcn) per cell in mid-lactation cows challenged by lipopolysaccharide (LPS) in blood and liver. The mRNA abundance of 31 genes related to inflammation, oxidative stress, and the corresponding stress response mechanisms, the mitochondrial quality control and the protein import system, as well as the phosphatidylinositol 3-kinase/protein kinase B pathway, were assessed using microfluidics integrated fluidic circuit chips (96.96 dynamic arrays). In addition to comparing the responses in cows with or without LC, our objectives were to characterize the oxidative and inflammatory status by assessing the circulating concentration of lactoferrin (Lf), haptoglobin (Hp), fibrinogen, derivates of reactive oxygen metabolites (dROM), and arylesterase activity (AEA), and to extend the measurement of Lf and Hp to milk. Pluriparous Holstein cows were assigned to either a control group (CON, n = 26) or an LC-supplemented group (CAR; 25 g LC/cow per day; d 42 ante partum to d 126 postpartum (PP), n = 27). On d 111 PP, each cow was injected intravenously with LPS (Escherichia coli O111:B4, 0.5 µg/kg). The mRNA abundance was examined in liver biopsies of d -11 and +1 relative to LPS administration. Plasma and milk samples were frequently collected before and after the challenge. After LPS administration, circulating plasma fibrinogen and serum dROM concentrations increased, whereas AEA decreased. Moreover, serum P4 initially increased by 3 h after LPS administration and declined thereafter irrespective of grouping. The Lf concentrations increased in both groups after LPS administration, with the CAR group showing greater concentrations in serum and milk than the CON group. After LPS administration, telomere length in blood increased, whereas mtDNAcn per cell decreased; however, both remained unaffected in liver. For mitochondrial protein import genes, the hepatic mRNA abundance of the translocase of the mitochondrial inner membrane (TIM)-17B was increased in CAR cows. Moreover, TIM23 increased in both groups after LPS administration. Regarding the mRNA abundance of genes related to stress response mechanisms, 7 out of 14 genes showed group × time interactions, indicating a (local) protective effect due to the dietary LC supplementation against oxidative stress in mid-lactating dairy cows. For mtDNAcn and telomere length, the effects of the LPS-induced inflammation were more pronounced than the dietary supplementation of LC. Dietary LC supplementation affected the response to LPS primarily by altering mitochondrial dynamics. Regarding mRNA abundance of genes related to the mitochondrial protein import system, the inner mitochondrial membrane translocase (TIM complex) seemed to be more sensitive to dietary LC than the outer mitochondrial membrane translocase (TOM complex).
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Affiliation(s)
- S Häussler
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany
| | - M H Ghaffari
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany.
| | - K Seibt
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany
| | - H Sadri
- Department of Clinical Science, Faculty of Veterinary Medicine, University of Tabriz, 516616471 Tabriz, Iran
| | - M Alaedin
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany
| | - K Huber
- Institute of Animal Science, Functional Anatomy of Livestock, University of Hohenheim, 70599 Stuttgart, Germany
| | - J Frahm
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 38116 Braunschweig, Germany
| | - S Dänicke
- Institute of Animal Nutrition, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 38116 Braunschweig, Germany
| | - H Sauerwein
- Institute of Animal Science, Physiology Unit, University of Bonn, 53115 Bonn, Germany
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13
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Bissonnette S, Lamantia V, Ouimet B, Cyr Y, Devaux M, Rabasa-Lhoret R, Chrétien M, Saleh M, Faraj M. Native low-density lipoproteins are priming signals of the NLRP3 inflammasome/interleukin-1β pathway in human adipose tissue and macrophages. Sci Rep 2023; 13:18848. [PMID: 37914804 PMCID: PMC10620147 DOI: 10.1038/s41598-023-45870-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 10/25/2023] [Indexed: 11/03/2023] Open
Abstract
Elevated plasma numbers of atherogenic apoB-lipoproteins (apoB), mostly as low-density lipoproteins (LDL), predict diabetes risk by unclear mechanisms. Upregulation of the NLRP3 inflammasome/interleukin-1 beta (IL-1β) system in white adipose tissue (WAT) is implicated in type 2 diabetes (T2D); however, metabolic signals that stimulate it remain unexplored. We hypothesized that (1) subjects with high-apoB have higher WAT IL-1β-secretion than subjects with low-apoB, (2) WAT IL-1β-secretion is associated with T2D risk factors, and (3) LDL prime and/or activate the WAT NLRP3 inflammasome. Forty non-diabetic subjects were assessed for T2D risk factors related to systemic and WAT glucose and fat metabolism. Regulation of the NLRP3 inflammasome was explored using LDL without/with the inflammasome's priming and activation controls (LPS and ATP). LDL induced IL1B-expression and IL-1β-secretion in the presence of ATP in WAT and macrophages. Subjects with high-apoB had higher WAT IL-1β-secretion independently of covariates. The direction of association of LDL-induced WAT IL-1β-secretion to T2D risk factors was consistently pathological in high-apoB subjects only. Adjustment for IL-1β-secretion eliminated the association of plasma apoB with T2D risk factors. In conclusion, subjects with high-apoB have higher WAT IL-1β-secretion that may explain their risk for T2D and may be related to LDL-induced priming of the NLRP3 inflammasome.ClinicalTrials.gov (NCT04496154): Omega-3 to Reduce Diabetes Risk in Subjects With High Number of Particles That Carry "Bad Cholesterol" in the Blood-Full Text View-ClinicalTrials.gov.
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Affiliation(s)
- Simon Bissonnette
- Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
- Institut de Recherches Cliniques de Montréal (IRCM), Office 1770.2, 110, Avenue Des Pins Ouest, Montréal, QC, H2W 1R7, Canada
- Montréal Diabetes Research Center (MDRC), Montréal, QC, Canada
| | - Valérie Lamantia
- Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
- Institut de Recherches Cliniques de Montréal (IRCM), Office 1770.2, 110, Avenue Des Pins Ouest, Montréal, QC, H2W 1R7, Canada
- Montréal Diabetes Research Center (MDRC), Montréal, QC, Canada
| | - Benjamin Ouimet
- Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
- Institut de Recherches Cliniques de Montréal (IRCM), Office 1770.2, 110, Avenue Des Pins Ouest, Montréal, QC, H2W 1R7, Canada
| | - Yannick Cyr
- Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
- Institut de Recherches Cliniques de Montréal (IRCM), Office 1770.2, 110, Avenue Des Pins Ouest, Montréal, QC, H2W 1R7, Canada
- Montréal Diabetes Research Center (MDRC), Montréal, QC, Canada
| | - Marie Devaux
- Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
- Institut de Recherches Cliniques de Montréal (IRCM), Office 1770.2, 110, Avenue Des Pins Ouest, Montréal, QC, H2W 1R7, Canada
| | - Remi Rabasa-Lhoret
- Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
- Institut de Recherches Cliniques de Montréal (IRCM), Office 1770.2, 110, Avenue Des Pins Ouest, Montréal, QC, H2W 1R7, Canada
- Montréal Diabetes Research Center (MDRC), Montréal, QC, Canada
| | - Michel Chrétien
- Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
- Institut de Recherches Cliniques de Montréal (IRCM), Office 1770.2, 110, Avenue Des Pins Ouest, Montréal, QC, H2W 1R7, Canada
| | - Maya Saleh
- Faculty of Medicine, McGill University, Montréal, QC, Canada
- University of Bordeaux, Bordeaux, France
| | - May Faraj
- Faculty of Medicine, Université de Montréal, Montréal, QC, Canada.
- Institut de Recherches Cliniques de Montréal (IRCM), Office 1770.2, 110, Avenue Des Pins Ouest, Montréal, QC, H2W 1R7, Canada.
- Montréal Diabetes Research Center (MDRC), Montréal, QC, Canada.
- Faculty of Medicine, McGill University, Montréal, QC, Canada.
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14
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Muniz-Santos R, Lucieri-Costa G, de Almeida MAP, Moraes-de-Souza I, Brito MADSM, Silva AR, Gonçalves-de-Albuquerque CF. Lipid oxidation dysregulation: an emerging player in the pathophysiology of sepsis. Front Immunol 2023; 14:1224335. [PMID: 37600769 PMCID: PMC10435884 DOI: 10.3389/fimmu.2023.1224335] [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: 05/17/2023] [Accepted: 06/30/2023] [Indexed: 08/22/2023] Open
Abstract
Sepsis is a life-threatening organ dysfunction caused by abnormal host response to infection. Millions of people are affected annually worldwide. Derangement of the inflammatory response is crucial in sepsis pathogenesis. However, metabolic, coagulation, and thermoregulatory alterations also occur in patients with sepsis. Fatty acid mobilization and oxidation changes may assume the role of a protagonist in sepsis pathogenesis. Lipid oxidation and free fatty acids (FFAs) are potentially valuable markers for sepsis diagnosis and prognosis. Herein, we discuss inflammatory and metabolic dysfunction during sepsis, focusing on fatty acid oxidation (FAO) alterations in the liver and muscle (skeletal and cardiac) and their implications in sepsis development.
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Affiliation(s)
- Renan Muniz-Santos
- Laboratory of Immunopharmacology, Department of Physiology, Federal University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Giovanna Lucieri-Costa
- Laboratory of Immunopharmacology, Department of Physiology, Federal University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Matheus Augusto P. de Almeida
- Neuroscience Graduate Program, Federal Fluminense University, Niteroi, Brazil
- Laboratory of Immunopharmacology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Isabelle Moraes-de-Souza
- Laboratory of Immunopharmacology, Department of Physiology, Federal University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Adriana Ribeiro Silva
- Laboratory of Immunopharmacology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Cassiano Felippe Gonçalves-de-Albuquerque
- Laboratory of Immunopharmacology, Department of Physiology, Federal University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
- Neuroscience Graduate Program, Federal Fluminense University, Niteroi, Brazil
- Laboratory of Immunopharmacology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
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15
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Rosendo-Silva D, Viana S, Carvalho E, Reis F, Matafome P. Are gut dysbiosis, barrier disruption, and endotoxemia related to adipose tissue dysfunction in metabolic disorders? Overview of the mechanisms involved. Intern Emerg Med 2023; 18:1287-1302. [PMID: 37014495 PMCID: PMC10412677 DOI: 10.1007/s11739-023-03262-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 03/11/2023] [Indexed: 04/05/2023]
Abstract
Recently, compelling evidence points to dysbiosis and disruption of the epithelial intestinal barrier as major players in the pathophysiology of metabolic disorders, such as obesity. Upon the intestinal barrier disruption, components from bacterial metabolism and bacteria itself can reach peripheral tissues through circulation. This has been associated with the low-grade inflammation that characterizes obesity and other metabolic diseases. While circulating bacterial DNA has been postulated as a common feature of obesity and even type 2 diabetes, almost no focus has been given to the existence and effects of bacteria in peripheral tissues, namely the adipose tissue. As a symbiont population, it is expected that gut microbiota modulate the immunometabolism of the host, thus influencing energy balance mechanisms and inflammation. Gut inflammatory signals cause direct deleterious inflammatory responses in adipose tissue and may also affect key gut neuroendocrine mechanisms governing nutrient sensing and energy balance, like incretins and ghrelin, which play a role in the gut-brain-adipose tissue axis. Thus, it is of major importance to disclose how gut microbiota and derived signals modulate neuroendocrine and inflammatory pathways, which contribute to the dysfunction of adipose tissue and to the metabolic sequelae of obesity and related disorders. This review summarizes the current knowledge regarding these topics and identifies new perspectives in this field of research, highlighting new pathways toward the reduction of the inflammatory burden of metabolic diseases.
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Affiliation(s)
- Daniela Rosendo-Silva
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal
- Institute of Physiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal
| | - Sofia Viana
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Instituto Politécnico de Coimbra, Coimbra Health School (ESTeSC), Coimbra, Portugal
| | - Eugénia Carvalho
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
- Center of Neuroscience and Cell Biology (CNC), University of Coimbra, Coimbra, Portugal
- Institute for Interdisciplinary Research, University of Coimbra, Coimbra, Portugal
| | - Flávio Reis
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
- Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal
- Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Paulo Matafome
- Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal.
- Institute of Physiology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal.
- Clinical Academic Center of Coimbra (CACC), Coimbra, Portugal.
- Instituto Politécnico de Coimbra, Coimbra Health School (ESTeSC), Coimbra, Portugal.
- Faculty of Medicine, Pole III of University of Coimbra, Subunit 1, 1st floor, Azinhaga de Santa Comba, Celas, 3000-354, Coimbra, Portugal.
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16
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Yao S, Zeng L, Wang F, Chen K. Obesity Paradox in Lung Diseases: What Explains It? Obes Facts 2023; 16:411-426. [PMID: 37463570 PMCID: PMC10601679 DOI: 10.1159/000531792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 06/28/2023] [Indexed: 07/20/2023] Open
Abstract
BACKGROUND Obesity is a globally increasing health problem that impacts multiple organ systems and a potentially modifiable risk factor for many diseases. Obesity has a significant impact on lung function and is strongly linked to the pathophysiology that contributes to lung diseases. On the other hand, reports have emerged that obesity is associated with a better prognosis than for normal weight individuals in some lung diseases, including pneumonia, acute lung injury/acute respiratory distress syndrome, chronic obstructive pulmonary disease, and lung cancer. The lesser mortality and better prognosis in patients with obesity is known as obesity paradox. While obesity paradox is both recognized and disputed in epidemiological studies, recent research has suggested possible mechanisms. SUMMARY In this review, we attempted to explain and summarize these factors and mechanisms, including immune response, pulmonary fibrosis, lung function, microbiota, fat and muscle reserves, which are significantly altered by obesity and may contribute to the obesity paradox in lung diseases. We also discuss contrary literature that attributes the "obesity paradox" to confounding. KEY MESSAGES The review will illustrate the possible role of obesity in the prognosis or course of lung diseases, leading to a better understanding of the obesity paradox and provide hints for further basic and clinical research in lung diseases.
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Affiliation(s)
- Surui Yao
- School of Public Health, Chengdu Medical College, Chengdu, PR China
| | - Lei Zeng
- School of Public Health, Chengdu Medical College, Chengdu, PR China
| | - Fengyuan Wang
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu, PR China
| | - Kejie Chen
- School of Public Health, Chengdu Medical College, Chengdu, PR China
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17
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Caratti G, Stifel U, Caratti B, Jamil AJM, Chung KJ, Kiehntopf M, Gräler MH, Blüher M, Rauch A, Tuckermann JP. Glucocorticoid activation of anti-inflammatory macrophages protects against insulin resistance. Nat Commun 2023; 14:2271. [PMID: 37080971 PMCID: PMC10119112 DOI: 10.1038/s41467-023-37831-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 04/01/2023] [Indexed: 04/22/2023] Open
Abstract
Insulin resistance (IR) during obesity is linked to adipose tissue macrophage (ATM)-driven inflammation of adipose tissue. Whether anti-inflammatory glucocorticoids (GCs) at physiological levels modulate IR is unclear. Here, we report that deletion of the GC receptor (GR) in myeloid cells, including macrophages in mice, aggravates obesity-related IR by enhancing adipose tissue inflammation due to decreased anti-inflammatory ATM leading to exaggerated adipose tissue lipolysis and severe hepatic steatosis. In contrast, GR deletion in Kupffer cells alone does not alter IR. Co-culture experiments show that the absence of GR in macrophages directly causes reduced phospho-AKT and glucose uptake in adipocytes, suggesting an important function of GR in ATM. GR-deficient macrophages are refractory to alternative ATM-inducing IL-4 signaling, due to reduced STAT6 chromatin loading and diminished anti-inflammatory enhancer activation. We demonstrate that GR has an important function in macrophages during obesity by limiting adipose tissue inflammation and lipolysis to promote insulin sensitivity.
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Affiliation(s)
- Giorgio Caratti
- Institute of Comparative Molecular Endocrinology, University of Ulm, Ulm, Germany
- NIHR Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford, OX3 9DU, UK
- Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Oxford, OX37LE, UK
| | - Ulrich Stifel
- Institute of Comparative Molecular Endocrinology, University of Ulm, Ulm, Germany
| | - Bozhena Caratti
- Institute of Comparative Molecular Endocrinology, University of Ulm, Ulm, Germany
| | - Ali J M Jamil
- Molecular Endocrinology & Stem Cell Research Unit, Department of Endocrinology and Metabolism, Odense University Hospital, Odense, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Kyoung-Jin Chung
- Institute for Clinical Chemistry and Laboratory Medicine, University Hospital and Faculty of Medicine, Technical University Dresden, Dresden, Germany
| | - Michael Kiehntopf
- SG Sepsis Research Clinic for Anesthesiology and Intensive Care, Jena University Hospital, Jena, Germany
| | - Markus H Gräler
- Department of Anesthesiology and Intensive Care Medicine, Jena University Hospital, Jena, Germany
- Center for Molecular Biomedicine (CMB), Jena University Hospital, Jena, Germany
- Center for Sepsis Control and Care (CSCC), Jena University Hospital, Jena, Germany
| | - Matthias Blüher
- Department of Endocrinology and Nephrology, University of Leipzig, Leipzig, Germany
| | - Alexander Rauch
- Molecular Endocrinology & Stem Cell Research Unit, Department of Endocrinology and Metabolism, Odense University Hospital, Odense, Denmark.
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
- Steno Diabetes Center Odense, Odense, Denmark.
| | - Jan P Tuckermann
- Institute of Comparative Molecular Endocrinology, University of Ulm, Ulm, Germany.
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18
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Berardo C, Calcaterra V, Mauri A, Carelli S, Messa L, Destro F, Rey F, Cordaro E, Pelizzo G, Zuccotti G, Cereda C. Subcutaneous Adipose Tissue Transcriptome Highlights Specific Expression Profiles in Severe Pediatric Obesity: A Pilot Study. Cells 2023; 12:cells12081105. [PMID: 37190014 DOI: 10.3390/cells12081105] [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: 02/09/2023] [Revised: 04/05/2023] [Accepted: 04/05/2023] [Indexed: 05/17/2023] Open
Abstract
The prevalence of pediatric obesity is rising rapidly worldwide, and "omic" approaches are helpful in investigating the molecular pathophysiology of obesity. This work aims to identify transcriptional differences in the subcutaneous adipose tissue (scAT) of children with overweight (OW), obesity (OB), or severe obesity (SV) compared with those of normal weight (NW). Periumbilical scAT biopsies were collected from 20 male children aged 1-12 years. The children were stratified into the following four groups according to their BMI z-scores: SV, OB, OW, and NW. scAT RNA-Seq analyses were performed, and a differential expression analysis was conducted using the DESeq2 R package. A pathways analysis was performed to gain biological insights into gene expression. Our data highlight the significant deregulation in both coding and non-coding transcripts in the SV group when compared with the NW, OW, and OB groups. A KEGG pathway analysis showed that coding transcripts were mainly involved in lipid metabolism. A GSEA analysis revealed the upregulation of lipid degradation and metabolism in SV vs. OB and SV vs. OW. Bioenergetic processes and the catabolism of branched-chain amino acids were upregulated in SV compared with OB, OW, and NW. In conclusion, we report for the first time that a significant transcriptional deregulation occurs in the periumbilical scAT of children with severe obesity compared with those of normal weight or those with overweight or mild obesity.
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Affiliation(s)
- Clarissa Berardo
- Pediatric Clinical Research Center "Romeo ed Enrica Invernizzi", Department of Biomedical and Clinical Science, University of Milan, 20157 Milan, Italy
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, 20154 Milan, Italy
| | - Valeria Calcaterra
- Pediatric and Adolescent Unit, Department of Internal Medicine, University of Pavia, 27100 Pavia, Italy
- Department of Pediatrics, Buzzi Children's Hospital, 20154 Milan, Italy
| | - Alessia Mauri
- Pediatric Clinical Research Center "Romeo ed Enrica Invernizzi", Department of Biomedical and Clinical Science, University of Milan, 20157 Milan, Italy
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, 20154 Milan, Italy
| | - Stephana Carelli
- Pediatric Clinical Research Center "Romeo ed Enrica Invernizzi", Department of Biomedical and Clinical Science, University of Milan, 20157 Milan, Italy
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, 20154 Milan, Italy
| | - Letizia Messa
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, 20154 Milan, Italy
- Department of Electronics, Information and Bioengineering (DEIB), Politecnico di Milano, 20133 Milan, Italy
| | - Francesca Destro
- Surgery Department, Buzzi Children's Hospital, 20154 Milan, Italy
| | - Federica Rey
- Pediatric Clinical Research Center "Romeo ed Enrica Invernizzi", Department of Biomedical and Clinical Science, University of Milan, 20157 Milan, Italy
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, 20154 Milan, Italy
| | - Erika Cordaro
- Pediatric and Adolescent Unit, Department of Internal Medicine, University of Pavia, 27100 Pavia, Italy
| | - Gloria Pelizzo
- Surgery Department, Buzzi Children's Hospital, 20154 Milan, Italy
- Department of Biomedical and Clinical Science, University of Milan, 20157 Milan, Italy
| | - Gianvincenzo Zuccotti
- Pediatric Clinical Research Center "Romeo ed Enrica Invernizzi", Department of Biomedical and Clinical Science, University of Milan, 20157 Milan, Italy
- Department of Pediatrics, Buzzi Children's Hospital, 20154 Milan, Italy
| | - Cristina Cereda
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, 20154 Milan, Italy
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19
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Vanderhaeghen T, Timmermans S, Eggermont M, Watts D, Vandewalle J, Wallaeys C, Nuyttens L, De Temmerman J, Hochepied T, Dewaele S, Berghe JV, Sanders N, Wielockx B, Beyaert R, Libert C. The impact of hepatocyte-specific deletion of hypoxia-inducible factors on the development of polymicrobial sepsis with focus on GR and PPARα function. Front Immunol 2023; 14:1124011. [PMID: 37006237 PMCID: PMC10060827 DOI: 10.3389/fimmu.2023.1124011] [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: 12/14/2022] [Accepted: 02/27/2023] [Indexed: 03/18/2023] Open
Abstract
IntroductionPolymicrobial sepsis causes acute anorexia (loss of appetite), leading to lipolysis in white adipose tissue and proteolysis in muscle, and thus release of free fatty acids (FFAs), glycerol and gluconeogenic amino acids. Since hepatic peroxisome proliferator-activated receptor alpha (PPARα) and glucocorticoid receptor (GR) quickly lose function in sepsis, these metabolites accumulate (causing toxicity) and fail to yield energy-rich molecules such as ketone bodies (KBs) and glucose. The mechanism of PPARα and GR dysfunction is not known.Methods & resultsWe investigated the hypothesis that hypoxia and/or activation of hypoxia inducible factors (HIFs) might play a role in these issues with PPARα and GR. After cecal ligation and puncture (CLP) in mice, leading to lethal polymicrobial sepsis, bulk liver RNA sequencing illustrated the induction of the genes encoding HIF1α and HIF2α, and an enrichment of HIF-dependent gene signatures. Therefore, we generated hepatocyte-specific knock-out mice for HIF1α, HIF2α or both, and a new HRE-luciferase reporter mouse line. After CLP, these HRE-luciferase reporter mice show signals in several tissues, including the liver. Hydrodynamic injection of an HRE-luciferase reporter plasmid also led to (liver-specific) signals in hypoxia and CLP. Despite these encouraging data, however, hepatocyte-specific HIF1α and/or HIF2α knock-out mice suggest that survival after CLP was not dependent on the hepatocyte-specific presence of HIF proteins, which was supported by measuring blood levels of glucose, FFAs, and KBs. The HIF proteins were also irrelevant in the CLP-induced glucocorticoid resistance, but we found indications that the absence of HIF1α in hepatocytes causes less inactivation of PPARα transcriptional function.ConclusionWe conclude that HIF1α and HIF2α are activated in hepatocytes in sepsis, but their contribution to the mechanisms leading to lethality are minimal.
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Affiliation(s)
- Tineke Vanderhaeghen
- Flanders Institute for Biotechnology (VIB) Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Steven Timmermans
- Flanders Institute for Biotechnology (VIB) Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Melanie Eggermont
- Flanders Institute for Biotechnology (VIB) Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Deepika Watts
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
- Deutsche Forschungsgemeinschaft (DFG) Research Centre and Cluster of Excellence for Regenerative Therapies Dresden, Technische Universität Dresden, Dresden, Germany
| | - Jolien Vandewalle
- Flanders Institute for Biotechnology (VIB) Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Charlotte Wallaeys
- Flanders Institute for Biotechnology (VIB) Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Louise Nuyttens
- Flanders Institute for Biotechnology (VIB) Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Joyca De Temmerman
- Department of Nutrition, Genetics, and Ethology, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
- Department of Pathology, Bacteriology, and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Tino Hochepied
- Flanders Institute for Biotechnology (VIB) Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Sylviane Dewaele
- Flanders Institute for Biotechnology (VIB) Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Joke Vanden Berghe
- Flanders Institute for Biotechnology (VIB) Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Niek Sanders
- Department of Nutrition, Genetics, and Ethology, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
- Department of Pathology, Bacteriology, and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Ghent, Belgium
| | - Ben Wielockx
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
- Deutsche Forschungsgemeinschaft (DFG) Research Centre and Cluster of Excellence for Regenerative Therapies Dresden, Technische Universität Dresden, Dresden, Germany
| | - Rudi Beyaert
- Flanders Institute for Biotechnology (VIB) Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Claude Libert
- Flanders Institute for Biotechnology (VIB) Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
- *Correspondence: Claude Libert,
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Gomes SV, Dias BV, Júnior PAM, Pereira RR, de Souza DMS, Breguez GS, de Lima WG, Magalhães CLDB, Cangussú SD, Talvani A, Queiroz KB, Calsavara AJC, Costa DC. High-fat diet increases mortality and intensifies immunometabolic changes in septic mice. J Nutr Biochem 2023; 116:109315. [PMID: 36921735 DOI: 10.1016/j.jnutbio.2023.109315] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 01/21/2023] [Accepted: 03/07/2023] [Indexed: 03/16/2023]
Abstract
Immunometabolic changes in the liver and white adipose tissue (WAT) caused by high-fat (HF) diet intake may worse metabolic adaptation and protection against pathogens in sepsis. We investigate the effect of chronic HF diet (15 weeks) on mortality and immunometabolic responses in female mice after sepsis induced by cecum ligation and perforation (CLP). At week 14, animals were divided into four groups: sham C diet (C-Sh), sepsis C diet (C-Sp), sham HF diet (HF-Sh) and sepsis HF diet (HF-Sp). The surviving animals were euthanised on the 7th day. The HF diet decreased survival rate (58.3% vs 76.2% C-Sp group), increased serum cytokine storm (IL-6 (1.41 ×; vs HF-Sh), IL-1β (1.37 ×; vs C-Sp), TNF (1.34 ×; vs C-Sp and 1.72 ×; vs HF-Sh), IL-17 (1.44 ×; vs HF-Sh), IL-10 (1.55 ×; vs C-Sp and 1.41 ×; HF-Sh), WAT inflammation (IL-6 (8.7 ×; vs C-Sp and 2.4 ×; vs HF-Sh), TNF (5 ×; vs C-Sp and 1.7 ×;vs HF-Sh), IL-17 (1.7 ×; vs C-Sp), IL-10 (7.4 ×; vs C-Sp and 1.3 ×; vs HF-Sh), and modulated lipid metabolism in septic mice. In the HF-Sp group liver's, we observed hepatomegaly, hydropic degeneration, necrosis, an increase in oxidative stress (reduction of CAT activity (-81.7%; vs HF-Sh); increase MDA levels (82.8%; vs HF-Sh), and hepatic IL-6 (1.9 ×; vs HF-Sh), and TNF (1.3 × %;vs HF-Sh) production. Furthermore, we found a decrease in the total number of inflammatory, mononuclear cells, and in the regenerative processes, and binucleated hepatocytes in a HF-Sp group liver's. Our results suggested that the organism under metabolic stress of a HF diet during sepsis may worsen the inflammatory landscape and hepatocellular injury and may harm the liver regenerative process.
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Affiliation(s)
- Sttefany Viana Gomes
- Laboratory of Metabolic Biochemistry (LBM), Department of Biological Sciences (DECBI), Graduate Program in Health and Nutrition, Graduate Program in Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Bruna Vidal Dias
- Laboratory of Metabolic Biochemistry (LBM), Department of Biological Sciences (DECBI), Graduate Program in Health and Nutrition, Graduate Program in Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Pedro Alves Machado Júnior
- Laboratory of Experimental Pathophysiology (LAFEx), Department of Biological Sciences (DECBI), Graduate Program in Health and Nutrition, Graduate Program in Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Renata Rebeca Pereira
- Laboratory of Metabolic Biochemistry (LBM), Department of Biological Sciences (DECBI), Graduate Program in Health and Nutrition, Graduate Program in Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Débora Maria Soares de Souza
- Laboratory of Immunobiology of Inflammation, Department of Biological Sciences (DECBI), Graduate Program in Health and Nutrition, Graduate Program in Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Gustavo Silveira Breguez
- Multiuser Research Laboratory, School of Nutrition, School of Nutrition, Postgraduate Program in Health and Nutrition, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Wanderson Geraldo de Lima
- Morphopathology Laboratory, Department of Biological Sciences (DECBI), Graduate Program in Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Cintia Lopes de Brito Magalhães
- Laboratory of Biology and Technology of Microorganisms (LBTM), Department of Biological Sciences (DECBI), Graduate Program in Health and Nutrition, Graduate Program in Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Silvia Dantas Cangussú
- Laboratory of Experimental Pathophysiology (LAFEx), Department of Biological Sciences (DECBI), Graduate Program in Health and Nutrition, Graduate Program in Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - André Talvani
- Laboratory of Immunobiology of Inflammation, Department of Biological Sciences (DECBI), Graduate Program in Health and Nutrition, Graduate Program in Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Karina Barbosa Queiroz
- Laboratory of Experimental Nutrition (LABNEx), Department of Food, Postgraduate Program in Health and Nutrition, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Allan Jefferson Cruz Calsavara
- Laboratory of Cognition and Health (LACOS), School of Medicine, Department of Pediatric and Adult Clinics (DECPA), Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Daniela Caldeira Costa
- Laboratory of Metabolic Biochemistry (LBM), Department of Biological Sciences (DECBI), Graduate Program in Health and Nutrition, Graduate Program in Biological Sciences, Federal University of Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil.
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Aird R, Wills J, Roby KF, Bénézech C, Stimson RH, Wabitsch M, Pollard JW, Finch A, Michailidou Z. Hypoxia-driven metabolic reprogramming of adipocytes fuels cancer cell proliferation. Front Endocrinol (Lausanne) 2022; 13:989523. [PMID: 36329893 PMCID: PMC9623062 DOI: 10.3389/fendo.2022.989523] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 09/15/2022] [Indexed: 12/05/2022] Open
Abstract
OBJECTIVE Obesity increases the risk of certain cancers, especially tumours that reside close to adipose tissue (breast and ovarian metastasis in the omentum). The obesogenic and tumour micro-environment share a common pathogenic feature, oxygen deprivation (hypoxia). Here we test how hypoxia changes the metabolome of adipocytes to assist cancer cell growth. METHODS Human and mouse breast and ovarian cancer cell lines were co-cultured with human and mouse adipocytes respectively under normoxia or hypoxia. Proliferation and lipid uptake in cancer cells were measured by commercial assays. Metabolite changes under normoxia or hypoxia were measured in the media of human adipocytes by targeted LC/MS. RESULTS Hypoxic cancer-conditioned media increased lipolysis in both human and mouse adipocytes. This led to increased transfer of lipids to cancer cells and consequent increased proliferation under hypoxia. These effects were dependent on HIF1α expression in adipocytes, as mouse adipocytes lacking HIF1α showed blunted responses under hypoxic conditions. Targeted metabolomics of the human Simpson-Golabi-Behmel syndrome (SGBS) adipocytes media revealed that culture with hypoxic-conditioned media from non-malignant mammary epithelial cells (MCF10A) can alter the adipocyte metabolome and drive proliferation of the non-malignant cells. CONCLUSION Here, we show that hypoxia in the adipose-tumour microenvironment is the driving force of the lipid uptake in both mammary and ovarian cancer cells. Hypoxia can modify the adipocyte metabolome towards accelerated lipolysis, glucose deprivation and reduced ketosis. These metabolic shifts in adipocytes could assist both mammary epithelial and cancer cells to bypass the inhibitory effects of hypoxia on proliferation and thrive.
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Affiliation(s)
- R. Aird
- University/British Heart Foundation (BHF) Centre for Cardiovascular Science, Edinburgh University, Edinburgh, United Kingdom
| | - J. Wills
- MRC Institute of Genetics and Molecular Medicine, Edinburgh University, Edinburgh, United Kingdom
| | - K. F. Roby
- University of Kansas Medical Center, Kansas City, Kansas, KS, United States
| | - C. Bénézech
- University/British Heart Foundation (BHF) Centre for Cardiovascular Science, Edinburgh University, Edinburgh, United Kingdom
| | - R. H. Stimson
- University/British Heart Foundation (BHF) Centre for Cardiovascular Science, Edinburgh University, Edinburgh, United Kingdom
| | - M. Wabitsch
- University Medical Center Department of Pediatrics and Adolescent Medicine, Ulm, Germany
| | - J. W. Pollard
- Medical Research Council (MRC) Centre for Reproductive Health, Edinburgh University, Edinburgh, United Kingdom
| | - A. Finch
- Centre for Tumour Biology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Z. Michailidou
- University/British Heart Foundation (BHF) Centre for Cardiovascular Science, Edinburgh University, Edinburgh, United Kingdom
- *Correspondence: Z. Michailidou,
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22
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Kawaguchi S, Okada M. Cardiac Metabolism in Sepsis. Metabolites 2021; 11:metabo11120846. [PMID: 34940604 PMCID: PMC8707959 DOI: 10.3390/metabo11120846] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 12/02/2021] [Accepted: 12/02/2021] [Indexed: 12/11/2022] Open
Abstract
The mechanism of sepsis-induced cardiac dysfunction is believed to be different from that of myocardial ischemia. In sepsis, chemical mediators, such as endotoxins, cytokines, and nitric oxide, cause metabolic abnormalities, mitochondrial dysfunction, and downregulation of β-adrenergic receptors. These factors inhibit the production of ATP, essential for myocardial energy metabolism, resulting in cardiac dysfunction. This review focuses on the metabolic changes in sepsis, particularly in the heart. In addition to managing inflammation, interventions focusing on metabolism may be a new therapeutic strategy for cardiac dysfunction due to sepsis.
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Affiliation(s)
- Satoshi Kawaguchi
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Bloomington, IN 46202, USA;
| | - Motoi Okada
- Department of Emergency Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan
- Correspondence: ; Tel.: +81-166-68-2852
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23
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Serum Perilipin 2 (PLIN2) Predicts Multiple Organ Dysfunction in Critically Ill Patients. Biomedicines 2021; 9:biomedicines9091210. [PMID: 34572396 PMCID: PMC8468514 DOI: 10.3390/biomedicines9091210] [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: 07/15/2021] [Revised: 09/03/2021] [Accepted: 09/07/2021] [Indexed: 12/24/2022] Open
Abstract
Perilipin 2 (PLIN2) is a lipid droplet protein with various metabolic functions. However, studies investigating PLIN2 in the context of inflammation, especially in systemic and acute inflammation, are lacking. Hence, we assessed the relevance of serum PLIN2 in critically ill patients. We measured serum PLIN2 serum in 259 critically ill patients (166 with sepsis) upon admission to a medical intensive care unit (ICU) compared to 12 healthy controls. A subset of 36 patients underwent computed tomography to quantify body composition. Compared to controls, serum PLIN2 concentrations were elevated in critically ill patients at ICU admission. Interestingly, PLIN2 independently indicated multiple organ dysfunction (MOD), defined as a SOFA score > 9 points, at ICU admission, and was also able to independently predict MOD after 48 h. Moreover, serum PLIN2 levels were associated with severe respiratory failure potentially reflecting a moribund state. However, PLIN2 was neither a predictor of ICU mortality nor did it reflect metabolic dysregulation. Conclusively, the first study assessing serum PLIN2 in critical illness proved that it may assist in risk stratification because it is capable of independently indicating MOD at admission and predicting MOD 48 h after PLIN2 measurement. Further evaluation regarding the underlying mechanisms is warranted.
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24
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Li C, Davis X, Lahni P, Stuck J, Williamson L, Kaplan J. Obesity protects against sepsis-induced and norepinephrine-induced white adipose tissue browning. Am J Physiol Endocrinol Metab 2021; 321:E433-E442. [PMID: 34370596 PMCID: PMC8461795 DOI: 10.1152/ajpendo.00380.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/03/2021] [Accepted: 08/03/2021] [Indexed: 11/22/2022]
Abstract
Sepsis is a dysregulated systemic response to infection and can lead to organ damage and death. Obesity is a significant problem worldwide and affects outcomes from sepsis. Our laboratory demonstrated that white adipose tissue (WAT) undergoes browning during sepsis, a process whereby WAT adopts a brown adipose tissue phenotype. However, this browning process was not observed in obese mice during sepsis. White adipose tissue browning is detrimental in patients with burn injury and cancer. We hypothesize that norepinephrine (NE) induces WAT browning in nonobese mice but not in obese mice similarly to sepsis-induced WAT browning. Six-week-old C57BL/6 male mice were randomized to a high-fat diet or normal diet. After 6-7 wk of feeding, polymicrobial sepsis was induced by cecal ligation and puncture (CLP). Norepinephrine was administered intraperitoneally via osmotic minipumps for 18 h or 72 h (no CLP) at which time tissue and plasma were harvested. Controls were mice that underwent CLP (no NE) with 18-h harvest. A separate group of mice underwent pretreatment with NE or vehicle infusion for 72 h, CLP was performed, and at 18 h had tissue and plasma harvested. Sepsis resulted in significant weight loss in both nonobese and obese mice. NE treatment alone caused weight loss in obese mice. Septic nonobese mice had higher uncoupling protein-1 (UCP1) expression compared with control and obese septic mice. NE treatment increased UCP1 expression in nonobese, but not obese mice. NE-treated obese septic mice had lower lung myeloperoxidase (MPO) activity, alanine aminotransferase (ALT), aspartate aminotransferase (AST), TNFα, and IL-6 levels compared with NE-treated nonobese septic mice. Obesity protects mice from septic-induced and NE-induced WAT browning.NEW & NOTEWORTHY White adipose tissue browning is detrimental in patients with burn injury and cancer. WAT browning occurs in nonobese mice and can be induced by β receptor norepinephrine infusion, but obese mice are resistant to sepsis-induced and norepinephrine-induced WAT browning. We propose that the lack of WAT browning and unchanged inflammatory cytokine response may contribute to the protection of obese mice from sepsis.
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Affiliation(s)
- Cheryl Li
- Division of Critical Care Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Xenia Davis
- Division of Critical Care Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Patrick Lahni
- Division of Critical Care Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Joanna Stuck
- Division of Critical Care Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Lauren Williamson
- Division of Critical Care Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Jennifer Kaplan
- Division of Critical Care Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
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25
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Whyte MB, Vas PRJ, Umpleby AM. Could Exogenous Insulin Ameliorate the Metabolic Dysfunction Induced by Glucocorticoids and COVID-19? Front Endocrinol (Lausanne) 2021; 12:649405. [PMID: 34220705 PMCID: PMC8249851 DOI: 10.3389/fendo.2021.649405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 06/02/2021] [Indexed: 01/08/2023] Open
Abstract
The finding that high-dose dexamethasone improves survival in those requiring critical care due to COVID-19 will mean much greater usage of glucocorticoids in the subsequent waves of coronavirus infection. Furthermore, the consistent finding of adverse outcomes from COVID-19 in individuals with obesity, hypertension and diabetes has focussed attention on the metabolic dysfunction that may arise with critical illness. The SARS coronavirus itself may promote relative insulin deficiency, ketogenesis and hyperglycaemia in susceptible individuals. In conjunction with prolonged critical care, these components will promote a catabolic state. Insulin infusion is the mainstay of therapy for treatment of hyperglycaemia in acute illness but what is the effect of insulin on the admixture of glucocorticoids and COVID-19? This article reviews the evidence for the effect of insulin on clinical outcomes and intermediary metabolism in critical illness.
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Affiliation(s)
- Martin Brunel Whyte
- Faculty of Health Sciences, University of Surrey, Guildford, United Kingdom
- King’s College Hospital NHS Foundation Trust, London, United Kingdom
| | | | - Anne M. Umpleby
- Faculty of Health Sciences, University of Surrey, Guildford, United Kingdom
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26
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Amunugama K, Pike DP, Ford DA. The lipid biology of sepsis. J Lipid Res 2021; 62:100090. [PMID: 34087197 PMCID: PMC8243525 DOI: 10.1016/j.jlr.2021.100090] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 01/12/2023] Open
Abstract
Sepsis, defined as the dysregulated immune response to an infection leading to organ dysfunction, is one of the leading causes of mortality around the globe. Despite the significant progress in delineating the underlying mechanisms of sepsis pathogenesis, there are currently no effective treatments or specific diagnostic biomarkers in the clinical setting. The perturbation of cell signaling mechanisms, inadequate inflammation resolution, and energy imbalance, all of which are altered during sepsis, are also known to lead to defective lipid metabolism. The use of lipids as biomarkers with high specificity and sensitivity may aid in early diagnosis and guide clinical decision making. In addition, identifying the link between specific lipid signatures and their role in sepsis pathology may lead to novel therapeutics. In this review, we discuss the recent evidence on dysregulated lipid metabolism both in experimental and human sepsis focused on bioactive lipids, fatty acids, and cholesterol as well as the enzymes regulating their levels during sepsis. We highlight not only their potential roles in sepsis pathogenesis but also the possibility of using these respective lipid compounds as diagnostic and prognostic biomarkers of sepsis.
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Affiliation(s)
- Kaushalya Amunugama
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO, USA; Center for Cardiovascular Research, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - Daniel P Pike
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO, USA; Center for Cardiovascular Research, Saint Louis University School of Medicine, St. Louis, MO, USA
| | - David A Ford
- Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO, USA; Center for Cardiovascular Research, Saint Louis University School of Medicine, St. Louis, MO, USA.
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27
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Metabolic Alterations in Sepsis. J Clin Med 2021; 10:jcm10112412. [PMID: 34072402 PMCID: PMC8197843 DOI: 10.3390/jcm10112412] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/19/2021] [Accepted: 05/27/2021] [Indexed: 12/20/2022] Open
Abstract
Sepsis is defined as “life-threatening organ dysfunction caused by a dysregulated host response to infection”. Contrary to the older definitions, the current one not only focuses on inflammation, but points to systemic disturbances in homeostasis, including metabolism. Sepsis leads to sepsis-induced dysfunction and mitochondrial damage, which is suggested as a major cause of cell metabolism disorders in these patients. The changes affect the metabolism of all macronutrients. The metabolism of all macronutrients is altered. A characteristic change in carbohydrate metabolism is the intensification of glycolysis, which in combination with the failure of entering pyruvate to the tricarboxylic acid cycle increases the formation of lactate. Sepsis also affects lipid metabolism—lipolysis in adipose tissue is upregulated, which leads to an increase in the level of fatty acids and triglycerides in the blood. At the same time, their use is disturbed, which may result in the accumulation of lipids and their toxic metabolites. Changes in the metabolism of ketone bodies and amino acids have also been described. Metabolic disorders in sepsis are an important area of research, both for their potential role as a target for future therapies (metabolic resuscitation) and for optimizing the current treatment, such as clinical nutrition.
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28
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Gibbs KW, Chuang Key CC, Belfield L, Krall J, Purcell L, Liu C, Files DC. Aging Influences the Metabolic and Inflammatory Phenotype in an Experimental Mouse Model of Acute Lung Injury. J Gerontol A Biol Sci Med Sci 2021; 76:770-777. [PMID: 32997738 PMCID: PMC8087268 DOI: 10.1093/gerona/glaa248] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Indexed: 01/16/2023] Open
Abstract
Increased age is a risk factor for poor outcomes from respiratory failure and acute respiratory distress syndrome (ARDS). In this study, we sought to define age-related differences in lung inflammation, muscle injury, and metabolism after intratracheal lipopolysaccharide (IT-LPS) acute lung injury (ALI) in adult (6 months) and aged (18-20 months) male C57BL/6 mice. We also investigated age-related changes in muscle fatty acid oxidation (FAO) and the consequences of systemic FAO inhibition with the drug etomoxir. Aged mice had a distinct lung injury course characterized by prolonged alveolar neutrophilia and lack of response to therapeutic exercise. To assess the metabolic consequences of ALI, aged and adult mice underwent whole body metabolic phenotyping before and after IT-LPS. Aged mice had prolonged anorexia and decreased respiratory exchange ratio, indicating increased reliance on FAO. Etomoxir increased mortality in aged but not adult ALI mice, confirming the importance of FAO on survival from acute severe stress and suggesting that adult mice have increased resilience to FAO inhibition. Skeletal muscles from aged ALI mice had increased transcription of key fatty acid metabolizing enzymes, CPT-1b, LCAD, MCAD, FATP1 and UCP3. Additionally, aged mice had increased protein levels of CPT-1b at baseline and after lung injury. Surprisingly, CPT-1b in isolated skeletal muscle mitochondria had decreased activity in aged mice compared to adults. The distinct phenotype of aged ALI mice has similar characteristics to the adverse age-related outcomes of ARDS. This model may be useful to examine and augment immunologic and metabolic abnormalities unique to the critically ill aged population.
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Affiliation(s)
- Kevin W Gibbs
- Department of Internal Medicine, Pulmonary, Critical Care, Allergy and Immunologic Diseases, Wake Forest School of Medicine, Winston-Salem, North Carolina
- Wake Forest Critical Illness, Injury, and Recovery Research Center, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Chia-Chi Chuang Key
- Department of Internal Medicine, Molecular Medicine, Wake Forest School of Medicine Winston-Salem, North Carolina
| | - Lanazha Belfield
- Department of Internal Medicine, Molecular Medicine, Wake Forest School of Medicine Winston-Salem, North Carolina
| | - Jennifer Krall
- Department of Internal Medicine, Pulmonary, Critical Care, Allergy and Immunologic Diseases, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Lina Purcell
- Department of Internal Medicine, Pulmonary, Critical Care, Allergy and Immunologic Diseases, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Chun Liu
- Department of Internal Medicine, Pulmonary, Critical Care, Allergy and Immunologic Diseases, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - D Clark Files
- Department of Internal Medicine, Pulmonary, Critical Care, Allergy and Immunologic Diseases, Wake Forest School of Medicine, Winston-Salem, North Carolina
- Wake Forest Critical Illness, Injury, and Recovery Research Center, Wake Forest School of Medicine, Winston-Salem, North Carolina
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Kim HJ, Kim SJ, Woo CW, Kim ST, Im M, Park SK, Kim JY, Yoo HJ, Woo DC, Kim JK. Treatment of chemotherapy-induced cachexia with BST204: a multimodal validation study. Metabolomics 2021; 17:36. [PMID: 33738589 DOI: 10.1007/s11306-021-01781-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 02/26/2021] [Indexed: 01/22/2023]
Abstract
INTRODUCTION Chemotherapy is a major etiology of cachexia. Ginseng products are known to have various anti-cachectic and health-promoting effects, such as inhibiting inflammation and promoting energy production. In particular, BST204, purified ginseng dry extract, contains multiple ginsenosides that can reduce chemotherapy-related fatigue and toxicity. OBJECTIVES To investigate the effects of BST204 on the alleviation of chemotherapy-induced cachexia using a multimodal approach. METHODS In a CT26 mouse syngeneic colon cancer model, cachexia was predominantly induced by chemotherapy with 5-fluorouracil (5-FU) than by tumor growth. BST204 at a dose of 100 or 200 mg/kg was administered to 5-FU-treated mice. RESULTS BST204 significantly mitigated the decrease in tumor-excluded body weight (change in 5-FU group and BST204 groups: - 13% vs. - 6% on day 7; - 30% vs. - 20% on day 11), muscle volume (- 19% vs. - 11%), and fat volume (- 91% vs. - 56%). The anti-cachectic effect of BST204 was histologically demonstrated by an improved balance between muscle regeneration and degeneration and a decrease in muscle cross-sectional area reduction. CONCLUSION Chemotherapy-induced cachexia was biochemically and metabolically characterized by activated inflammation, enhanced oxidative stress, increased protein degradation, decreased protein stabilization, reduced glucose-mediated energy production, and deactivated glucose-mediated biosynthesis. These adverse effects were significantly improved by BST204 treatment. Overall, our multimodal study demonstrated that BST204 could effectively alleviate chemotherapy-induced cachexia.
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Affiliation(s)
- Ho-Jin Kim
- Department of Medical Science, Asan Medical Center, Asan Medical Institute of Convergence and Technology, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Su Jung Kim
- Department of Convergence Medicine, Asan Medical Center, Asan Medical Institute of Convergence and Technology, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Chul-Woong Woo
- MR Core Laboratory, Asan Medical Center, Asan Medical Institute of Convergence and Technology,, Seoul, Republic of Korea
| | - Sang-Tae Kim
- MR Core Laboratory, Asan Medical Center, Asan Medical Institute of Convergence and Technology,, Seoul, Republic of Korea
| | - Minju Im
- GREEN CROSS Wellbeing Co., Ltd, Seongnam, Republic of Korea
| | - Sun Kyu Park
- GREEN CROSS Wellbeing Co., Ltd, Seongnam, Republic of Korea
| | - Jeom-Yong Kim
- GREEN CROSS Wellbeing Co., Ltd, Seongnam, Republic of Korea
| | - Hyun Ju Yoo
- Department of Convergence Medicine, Asan Medical Center, Asan Medical Institute of Convergence and Technology, University of Ulsan College of Medicine, Seoul, Republic of Korea.
| | - Dong-Cheol Woo
- Department of Convergence Medicine, Asan Medical Center, Asan Medical Institute of Convergence and Technology, University of Ulsan College of Medicine, Seoul, Republic of Korea.
- MR Core Laboratory, Asan Medical Center, Asan Medical Institute of Convergence and Technology,, Seoul, Republic of Korea.
| | - Jeong Kon Kim
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
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30
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Fan M, Du X, Chen X, Bai H, Loor JJ, Shen T, Liang Y, Sun X, Xu Q, Song Y, Wang Z, Liu G, Yang L, Li X, Li X, Gao W. Inhibition of cell death inducing DNA fragmentation factor-α-like effector c (CIDEC) by tumor necrosis factor-α induces lipolysis and inflammation in calf adipocytes. J Dairy Sci 2021; 104:6134-6145. [PMID: 33685683 DOI: 10.3168/jds.2020-19319] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 12/12/2020] [Indexed: 02/05/2023]
Abstract
Dairy cows with ketosis exhibit signs of pronounced adipose tissue lipolysis and systemic inflammation, both of which exacerbate this metabolic disorder. In nonruminants, CIDEC plays a pivotal role in the formation of large unilocular lipid droplets. The present study aimed to ascertain the role of CIDEC in the lipolytic and inflammatory response of white adipose tissue (WAT) in vivo and in vitro. Subcutaneous adipose tissue and blood samples were collected from 15 healthy cows (blood β-hydroxybutyrate concentration < 1.2 mM) and 15 cows with clinical ketosis (blood β-hydroxybutyrate concentration > 3.0 mM) that had a similar number of lactations (median = 3, range = 2-4) and days in milk (median = 6 d, range = 3-9). Adipocytes isolated from 5 healthy Holstein calves (1 d old, female, 30-40 kg) were used for in vitro studies. Isolated adipocytes were treated with 0, 0.1, 1, or 10 ng/mL TNF-α for 3 h, transfected with CIDEC small interfering RNA for 48 h, or transfected with CIDEC overexpression adenovirus for 48 h followed by treatment with TNF-α (0.1 ng/mL) for 3 h. Serum concentrations of fatty acids were greater, and dry matter intake, milk yield, and serum glucose concentrations lower in cows with clinical ketosis. Protein and mRNA abundance of CIDEC were lesser in subcutaneous WAT of clinically ketotic versus healthy cows. Furthermore, the ratio of phosphorylated hormone sensitive lipase (p-LIPE) to LIPE, phosphorylated RELA (p-RELA) to RELA, and protein abundance of PNPLA2 and phosphorylated inhibitor of κBα (p-NFKBIA) were greater in dairy cows with clinical ketosis. The mRNA abundance of proinflammatory cytokines TNFA and IL1B were greater, and the anti-inflammatory cytokine IL10 was lower in WAT of dairy cows with clinical ketosis. In calf adipocytes, exogenous TNF-α (0.1, 1, or 10 ng/mL) decreased protein and mRNA abundance of CIDEC. In addition, exogenous TNF-α or knockdown of CIDEC reduced the secretion of the anti-inflammatory cytokine IL-10, but increased the ratio of p-LIPE to LIPE, p-RELA to RELA, protein abundance of PNPLA2 and p-NFKBIA, glycerol content, and the secretion of IL-1β in calf adipocytes. Overexpression of CIDEC in TNFα-treated adipocytes attenuated lipolysis and activation of the NF-κB signaling pathway. Overall, these data suggest that inhibition of lipid droplet-associated protein CIDEC by TNF-α contributes to the pronounced lipolysis and inflammation of calf adipocytes, and CIDEC is a relevant target in clinically ketotic cows.
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Affiliation(s)
- Minghe Fan
- College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, China; Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China
| | - Xiliang Du
- Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China
| | - Xiying Chen
- Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China
| | - Hongxu Bai
- Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China
| | - Juan J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801
| | - Taiyu Shen
- Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China
| | - Yusheng Liang
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801
| | - Xudong Sun
- Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China
| | - Qiushi Xu
- Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China
| | - Yuxiang Song
- Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China
| | - Zhe Wang
- Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China
| | - Guowen Liu
- Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China
| | - Liangyu Yang
- College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, China
| | - Xinwei Li
- Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China
| | - Xiaobing Li
- College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, China.
| | - Wenwen Gao
- Key Laboratory of Zoonoses Research, Ministry of Education, College of Veterinary Medicine, Jilin University, 5333 Xi'an Road, Changchun, Jilin Province 130062, China.
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Desoye G, Herrera E. Adipose tissue development and lipid metabolism in the human fetus: The 2020 perspective focusing on maternal diabetes and obesity. Prog Lipid Res 2020; 81:101082. [PMID: 33383022 DOI: 10.1016/j.plipres.2020.101082] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 12/21/2020] [Accepted: 12/22/2020] [Indexed: 12/12/2022]
Abstract
During development, the human fetus accrues the highest proportion of fat of all mammals. Precursors of fat lobules can be found at week 14 of pregnancy. Thereafter, they expand, filling with triacylglycerols during pregnancy. The resultant mature lipid-filled adipocytes emerge from a developmental programme of embryonic stem cells, which is regulated differently than adult adipogenesis. Fetal triacylglycerol synthesis uses glycerol and fatty acids derived predominantly from glycolysis and lipogenesis in liver and adipocytes. The fatty acid composition of fetal adipose tissue at the end of pregnancy shows a preponderance of palmitic acid, and differs from the mother. Maternal diabetes mellitus does not influence this fatty acid profile. Glucose oxidation is the main source of energy for the fetus, but mitochondrial fatty acid oxidation also contributes. Indirect evidence suggests the presence of lipoprotein lipase in fetal adipose tissue. Its activity may be increased under hyperinsulinemic conditions as in maternal diabetes mellitus and obesity, thereby contributing to increased triacylglycerol deposition found in the newborns of such pregnancies. Fetal lipolysis is low. Changes in the expression of genes controlling metabolism in fetal adipose tissue appear to contribute actively to the increased neonatal fat mass found in diabetes and obesity. Many of these processes are under endocrine regulation, principally by insulin, and show sex-differences. Novel fatty acid derived signals such as oxylipins are present in cord blood with as yet undiscovered function. Despite many decades of research on fetal lipid deposition and metabolism, many key questions await answers.
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Affiliation(s)
- G Desoye
- Department of Obstetrics and Gynaecology, Medical University of Graz, Graz, Austria.
| | - E Herrera
- Faculties of Pharmacy and Medicine, University CEU San Pablo, Madrid, Spain.
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Generation of immune cell containing adipose organoids for in vitro analysis of immune metabolism. Sci Rep 2020; 10:21104. [PMID: 33273595 PMCID: PMC7713299 DOI: 10.1038/s41598-020-78015-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 11/19/2020] [Indexed: 12/12/2022] Open
Abstract
Adipose tissue is an organized endocrine organ with important metabolic and immunological functions and immune cell-adipocyte crosstalk is known to drive various disease pathologies. Suitable 3D adipose tissue organoid models often lack resident immune cell populations and therefore require the addition of immune cells isolated from other organs. We have created the first 3D adipose tissue organoid model which could contain and maintain resident immune cell populations of the stromal vascular fraction (SVF) and proved to be effective in studying adipose tissue biology in a convenient manner. Macrophage and mast cell populations were successfully confirmed within our organoid model and were maintained in culture without the addition of growth factors. We demonstrated the suitability of our model for monitoring the lipidome during adipocyte differentiation in vitro and confirmed that this model reflects the physiological lipidome better than standard 2D cultures. In addition, we applied mass spectrometry-based lipidomics to track lipidomic changes in the lipidome upon dietary and immunomodulatory interventions. We conclude that this model represents a valuable tool for immune-metabolic research.
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Mose M, Rittig N, Mikkelsen UR, Jessen N, Bengtsen MB, Christensen B, Jørgensen JOL, Møller N. A model mimicking catabolic inflammatory disease; a controlled randomized study in humans. PLoS One 2020; 15:e0241274. [PMID: 33151986 PMCID: PMC7644057 DOI: 10.1371/journal.pone.0241274] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/12/2020] [Indexed: 01/01/2023] Open
Abstract
Objective Inflammatory disease is catabolic and associated with insulin resistance, increased energy expenditure, lipolysis and muscle protein loss. The main contributors to these metabolic adaptations are inflammation, malnutrition and immobilisation. Controlled experimental models incorporating these central elements of hospitalisation are lacking. The aim of this study was to validate such a human experimental model. Methods In a randomized crossover design, six healthy young men underwent; (i) overnight fast (CTR), or (ii) exposure to systemic lipopolysaccharide (1 ng/kg) combined with 36-hour fast and bed rest (CAT). The difference in insulin sensitivity between CAT and CTR was the main outcome, determined by a hyperinsulinemic euglycemic glucose clamp. Palmitate, glucose, urea, phenylalanine and tyrosine tracers were infused to estimate metabolic shifts during interventions. Indirect calorimetry was used to estimate energy expenditure and substrate oxidation. Results Insulin sensitivity was 41% lower in CAT than in CTR (M-value, mg/kg/min): 4.3 ± 0.2 vs 7.3 ± 1.3, p<0.05. The median (min max) palmitate flux (μmol/min) was higher during CAT than in CTR (257.0 (161.7 365.4) vs 131.6 (92.3 189.4), p = 0.004), and protein kinetics did not differ between interventions. C-reactive peptide (mg/L) was elevated in CAT compared with CTR (30.57 ± 4.08 vs 1.03 ± 0.19, p<0.001). Energy expenditure increased by 6% during CAT compared with CTR (1869 ± 94 vs 1756 ± 58, p = 0.04), CAT having higher lipid oxidation rates (p = 0.01) and lower glucose oxidation rates (p = 0.03). Lipopolysaccharide caused varying abdominal discomfort 2 hours post-injection, which had disappeared the following day. Conclusion We found that combined systemic inflammation, fasting and bed rest induced marked insulin resistance and increased energy expenditure and lipolysis, rendering this controlled experimental model suitable for anti-catabolic intervention studies, mimicking clinical conditions.
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Affiliation(s)
- Maike Mose
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
- * E-mail:
| | - Nikolaj Rittig
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
- STENO Diabetes Center, Aarhus University Hospital, Aarhus, Denmark
| | | | - Niels Jessen
- STENO Diabetes Center, Aarhus University Hospital, Aarhus, Denmark
| | - Mads Bisgaard Bengtsen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | | | | | - Niels Møller
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
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Jackson PA, Husberg C, Hustvedt SO, Calder PC, Khan J, Avery H, Forster J, Kennedy DO. Diurnal rhythm of plasma EPA and DHA in healthy adults. Prostaglandins Leukot Essent Fatty Acids 2020; 154:102054. [PMID: 32018166 DOI: 10.1016/j.plefa.2020.102054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 12/19/2019] [Accepted: 01/13/2020] [Indexed: 10/25/2022]
Abstract
Knowledge of the diurnal variation in circulating omega-3 polyunsaturated fatty acids (n-3 PUFAs) may be an important consideration for the development of dosing protocols designed to optimise tissue delivery of these fatty acids. The objective of the current study was to examine the variation in plasma concentrations of eicosapentaenoic acid (EPA; 20:5n-3) and docosahexaenoic acid (DHA; 22:6n-3) over a 24-h period in healthy adults under eating and sleeping conditions generally approximate to a free-living environment. Twenty-one healthy participants aged 25-44 years took part in a single laboratory visit encompassing an overnight stay. EPA and DHA were measured in plasma samples collected every two hours from 22:00 until 22:00 the following day, with all meals being provided at conventional times. Cosinor analysis was used to estimate the diurnal variation in each fatty acid from pooled data across all participants. A significant diurnal variation in the pooled plasma concentrations of both fatty acids was detected. However, evidence of distinct rhythmicity was strongest for DHA. The timing of the peak concentration of DHA was 17:43 with a corresponding nadir at 05:43. In comparison, the observed acrophase for EPA was delayed by three hours, occurring at 20:41, with a nadir at 08:41. This is the first time that the diurnal variation in these important bioactive fatty acids has been described in a sample of healthy adults following a normal pattern of eating and sleeping. In the absence of any dietary intake of EPA and DHA, circulating levels of these fatty acids fall during the overnight period and reach their lowest point in the morning. Consumption of n-3 PUFAs at night time, which counteracts this pattern, may have functional significance.
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Affiliation(s)
- Philippa A Jackson
- Brain Performance and Nutrition Research Centre, Northumbria University, Newcastle Upon Tyne NE1 8ST, United Kingdom.
| | | | | | - Philip C Calder
- Human Development and Health, Faculty of Medicine, University of Southampton., Southampton SO16 6YD, United Kingdom; National Institute of Health Research Southampton Biomedical Research Centre, University Hospital Southampton National Health Service Foundation Trust and University of Southampton, Southampton SO16 6YD, United Kingdom
| | - Julie Khan
- Brain Performance and Nutrition Research Centre, Northumbria University, Newcastle Upon Tyne NE1 8ST, United Kingdom
| | - Hannah Avery
- Brain Performance and Nutrition Research Centre, Northumbria University, Newcastle Upon Tyne NE1 8ST, United Kingdom
| | - Joanne Forster
- Brain Performance and Nutrition Research Centre, Northumbria University, Newcastle Upon Tyne NE1 8ST, United Kingdom
| | - David O Kennedy
- Brain Performance and Nutrition Research Centre, Northumbria University, Newcastle Upon Tyne NE1 8ST, United Kingdom
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Van Wyngene L, Vanderhaeghen T, Timmermans S, Vandewalle J, Van Looveren K, Souffriau J, Wallaeys C, Eggermont M, Ernst S, Van Hamme E, Gonçalves A, Eelen G, Remmerie A, Scott CL, Rombouts C, Vanhaecke L, De Bus L, Decruyenaere J, Carmeliet P, Libert C. Hepatic PPARα function and lipid metabolic pathways are dysregulated in polymicrobial sepsis. EMBO Mol Med 2020; 12:e11319. [PMID: 31916705 PMCID: PMC7005534 DOI: 10.15252/emmm.201911319] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 11/28/2019] [Accepted: 11/29/2019] [Indexed: 12/14/2022] Open
Abstract
Despite intensive research and constant medical progress, sepsis remains one of the most urgent unmet medical needs of today. Most studies have been focused on the inflammatory component of the disease; however, recent advances support the notion that sepsis is accompanied by extensive metabolic perturbations. During times of limited caloric intake and high energy needs, the liver acts as the central metabolic hub in which PPARα is crucial to coordinate the breakdown of fatty acids. The role of hepatic PPARα in liver dysfunction during sepsis has hardly been explored. We demonstrate that sepsis leads to a starvation response that is hindered by the rapid decline of hepatic PPARα levels, causing excess free fatty acids, leading to lipotoxicity, and glycerol. In addition, treatment of mice with the PPARα agonist pemafibrate protects against bacterial sepsis by improving hepatic PPARα function, reducing lipotoxicity and tissue damage. Since lipolysis is also increased in sepsis patients and pemafibrate protects after the onset of sepsis, these findings may point toward new therapeutic leads in sepsis.
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Affiliation(s)
- Lise Van Wyngene
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Tineke Vanderhaeghen
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Steven Timmermans
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Jolien Vandewalle
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Kelly Van Looveren
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Jolien Souffriau
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Charlotte Wallaeys
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Melanie Eggermont
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Sam Ernst
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Evelien Van Hamme
- Bio Imaging Core, VIB Center for Inflammation Research, Ghent, Belgium
| | - Amanda Gonçalves
- Bio Imaging Core, VIB Center for Inflammation Research, Ghent, Belgium
| | - Guy Eelen
- Laboratory of Angiogenesis and Vascular Biology, VIB Center for Cancer Biology, VIB, Leuven, Belgium.,Laboratory of Angiogenesis and Vascular Metabolism, Department of Oncology and Leuven Cancer Institute (LKI), KU Leuven, Leuven, Belgium
| | - Anneleen Remmerie
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Charlotte L Scott
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Caroline Rombouts
- Faculty of Veterinary Medicine, Department of Veterinary Public Health and Food Safety, Laboratory of Chemical Analysis, Ghent University, Ghent, Belgium
| | - Lynn Vanhaecke
- Faculty of Veterinary Medicine, Department of Veterinary Public Health and Food Safety, Laboratory of Chemical Analysis, Ghent University, Ghent, Belgium
| | - Liesbet De Bus
- Department of Critical Care Medicine, Ghent University Hospital, Ghent, Belgium
| | - Johan Decruyenaere
- Department of Critical Care Medicine, Ghent University Hospital, Ghent, Belgium
| | - Peter Carmeliet
- Laboratory of Angiogenesis and Vascular Biology, VIB Center for Cancer Biology, VIB, Leuven, Belgium.,Laboratory of Angiogenesis and Vascular Metabolism, Department of Oncology and Leuven Cancer Institute (LKI), KU Leuven, Leuven, Belgium
| | - Claude Libert
- Center for Inflammation Research, VIB, Ghent, Belgium.,Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
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Huang X, Yan D, Xu M, Li F, Ren M, Zhang J, Wu M. Interactive association of lipopolysaccharide and free fatty acid with the prevalence of type 2 diabetes: A community-based cross-sectional study. J Diabetes Investig 2019; 10:1438-1446. [PMID: 30950561 PMCID: PMC6825935 DOI: 10.1111/jdi.13056] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/22/2019] [Accepted: 04/02/2019] [Indexed: 12/25/2022] Open
Abstract
AIMS/INTRODUCTION Increased blood lipopolysaccharide (LPS) or free fatty acid (FFA) levels correlate with an increased risk of type 2 diabetes. The purpose of the present study was to evaluate the interactive effect of serum LPS and FFA levels on the prevalence of type 2 diabetes. MATERIALS AND METHODS This cross-sectional study included 2,553 community-dwelling Chinese adults. Fasting serum LPS levels were determined using the Limulus Amebocyte Lysate Chromogenic Endpoint assay, and FFA levels were determined using an enzymatic method. The participants were divided into three groups according to the tertiles of LPS or FFA levels or nine groups according to the tertiles of LPS and FFA levels. The odd ratios (ORs) for type 2 diabetes were estimated using logistic regression analysis. RESULTS We found that higher serum LPS or FFA levels were associated with higher high-sensitivity C-reactive protein levels (P < 0.001), homeostatic model assessment of insulin resistance levels (P < 0.001) and ORs for type 2 diabetes (P < 0.01). Meanwhile, there were significant interactions between LPS and FFA in terms of the high-sensitivity C-reactive protein level (P < 0.001), homeostatic model assessment of insulin resistance level (P < 0.001) and ORs for type 2 diabetes (P < 0.001). In the fully adjusted logistic regression model, the OR for participants with type 2 diabetes in the higher LPS and FFA level group were 6.58 (95% confidence interval 3.05-14.18, P < 0.001) compared with that in participants in the lower LPS and FFA level group. CONCLUSIONS The interaction between LPS and FFA was associated with an increased risk of type 2 diabetes in community-dwelling Chinese adults.
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Affiliation(s)
- Xiuji Huang
- Department of EndocrinologySun Yat‐sen Memorial HospitalSun Yat‐sen UniversityGuangzhouChina
| | - Dan Yan
- Department of EndocrinologySun Yat‐sen Memorial HospitalSun Yat‐sen UniversityGuangzhouChina
| | - Mingtong Xu
- Department of EndocrinologySun Yat‐sen Memorial HospitalSun Yat‐sen UniversityGuangzhouChina
| | - Feng Li
- Department of EndocrinologySun Yat‐sen Memorial HospitalSun Yat‐sen UniversityGuangzhouChina
| | - Meng Ren
- Department of EndocrinologySun Yat‐sen Memorial HospitalSun Yat‐sen UniversityGuangzhouChina
| | - Jin Zhang
- Department of EndocrinologySun Yat‐sen Memorial HospitalSun Yat‐sen UniversityGuangzhouChina
| | - Muchao Wu
- Department of EndocrinologySun Yat‐sen Memorial HospitalSun Yat‐sen UniversityGuangzhouChina
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Hjelholt AJ, Lee KY, Arlien-Søborg MC, Pedersen SB, Kopchick JJ, Puri V, Jessen N, Jørgensen JOL. Temporal patterns of lipolytic regulators in adipose tissue after acute growth hormone exposure in human subjects: A randomized controlled crossover trial. Mol Metab 2019; 29:65-75. [PMID: 31668393 PMCID: PMC6731350 DOI: 10.1016/j.molmet.2019.08.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 08/11/2019] [Accepted: 08/15/2019] [Indexed: 12/18/2022] Open
Abstract
Objective Growth hormone (GH) stimulates lipolysis, but the underlying mechanisms remain incompletely understood. We examined the effect of GH on the expression of lipolytic regulators in adipose tissue (AT). Methods In a randomized, placebo-controlled, cross-over study, nine men were examined after injection of 1) a GH bolus and 2) a GH-receptor antagonist (pegvisomant) followed by four AT biopsies. In a second study, eight men were examined in a 2 × 2 factorial design including GH infusion and 36-h fasting with AT biopsies obtained during a basal period and a hyperinsulinemic-euglycemic clamp. Expression of GH-signaling intermediates and lipolytic regulators were studied by PCR and western blotting. In addition, mechanistic experiments in mouse models and 3T3-L1 adipocytes were performed. Results The GH bolus increased circulating free fatty acids (p < 0.0001) together with phosphorylation of signal transducer and activator of transcription 5 (STAT5) (p < 0.0001) and mRNA expression of the STAT5-dependent genes cytokine-inducible SH2-containing protein (CISH) and IGF-1 in AT. This was accompanied by suppressed mRNA expression of G0/G1 switch gene 2 (G0S2) (p = 0.007) and fat specific protein 27 (FSP27) (p = 0.002) and upregulation of phosphatase and tensin homolog (PTEN) mRNA expression (p = 0.03). Suppression of G0S2 was also observed in humans after GH infusion and fasting, as well as in GH transgene mice, and in vitro studies suggested MEK-PPARγ signaling to be involved. Conclusions GH-induced lipolysis in human subjects in vivo is linked to downregulation of G0S2 and FSP27 and upregulation of PTEN in AT. Mechanistically, in vitro data suggest that GH acts via MEK to suppress PPARγ-dependent transcription of G0S2. ClinicalTrials.govNCT02782221 and NCT01209429. Acute GH exposure in human subjects in vivo stimulates lipolysis and release of FFA together with GH signaling in adipose tissue. GH-induced lipolysis is associated with suppression of G0S2 and FSP27 and upregulation of PTEN in human subjects in vivo. Inhibition of MEK and activation of PPARγ abrogate GH-induced suppression of G0S2 mRNA expression in vitro.
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Affiliation(s)
- Astrid Johannesson Hjelholt
- Medical Research Laboratory, Department of Clinical Medicine, Endocrinology and Internal Medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark; Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 82, 8200 Aarhus N, Denmark.
| | - Kevin Y Lee
- Heritage College of Osteopathic Medicine, Ohio University, 204 Grosvenor Hall, Athens, OH 45701, USA; The Diabetes Institute, Ohio University, Konneker Research Center 108, Athens, OH 45701, USA
| | - Mai Christiansen Arlien-Søborg
- Medical Research Laboratory, Department of Clinical Medicine, Endocrinology and Internal Medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark; Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 82, 8200 Aarhus N, Denmark
| | - Steen Bønløkke Pedersen
- Medical Research Laboratory, Department of Clinical Medicine, Endocrinology and Internal Medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark; Steno Diabetes Center Aarhus, Aarhus University Hospital, Hedeager 3, 2., 8200 Aarhus N, Denmark
| | - John J Kopchick
- Heritage College of Osteopathic Medicine, Ohio University, 204 Grosvenor Hall, Athens, OH 45701, USA; The Edison Biotechnology Institute, Ohio University, Konneker Research Center, 172 Water Tower Dr., Athens, OH 45701, USA
| | - Vishwajeet Puri
- Heritage College of Osteopathic Medicine, Ohio University, 204 Grosvenor Hall, Athens, OH 45701, USA; The Diabetes Institute, Ohio University, Konneker Research Center 108, Athens, OH 45701, USA
| | - Niels Jessen
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Hedeager 3, 2., 8200 Aarhus N, Denmark; Department of Clinical Pharmacology, Aarhus University Hospital, Wilh. Meyers Allé 4, 8000 Aarhus C, Denmark; Department of Biomedicine, Aarhus University, Vennelyst Boulevard 4, 8000 Aarhus C, Denmark
| | - Jens Otto L Jørgensen
- Medical Research Laboratory, Department of Clinical Medicine, Endocrinology and Internal Medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark; Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 82, 8200 Aarhus N, Denmark
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38
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Maia LDA, Cruz FF, de Oliveira MV, Samary CS, Fernandes MVDS, Trivelin SDAA, Rocha NDN, Gama de Abreu M, Pelosi P, Silva PL, Rocco PRM. Effects of Obesity on Pulmonary Inflammation and Remodeling in Experimental Moderate Acute Lung Injury. Front Immunol 2019; 10:1215. [PMID: 31275296 PMCID: PMC6593291 DOI: 10.3389/fimmu.2019.01215] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 05/13/2019] [Indexed: 01/10/2023] Open
Abstract
Obese patients are at higher risk of developing acute respiratory distress syndrome (ARDS); however, their survival rates are also higher compared to those of similarly ill non-obese patients. We hypothesized that obesity would not only prevent lung inflammation, but also reduce remodeling in moderate endotoxin-induced acute lung injury (ALI). Obesity was induced by early postnatal overfeeding in Wistar rats in which the litter size was reduced to 3 pups/litter (Obese, n = 18); Control animals (n = 18) were obtained from unculled litters. On postnatal day 150, Control, and Obese animals randomly received E. coli lipopolysaccharide (ALI) or saline (SAL) intratracheally. After 24 h, echocardiography, lung function and morphometry, and biological markers in lung tissue were evaluated. Additionally, mediator expression in neutrophils and macrophages obtained from blood and bronchoalveolar lavage fluid (BALF) was analyzed. Compared to Control-SAL animals, Control-ALI rats showed no changes in echocardiographic parameters, increased lung elastance and resistance, higher monocyte phagocytic capacity, collagen fiber content, myeloperoxidase (MPO) activity, and levels of interleukin (IL-6), tumor necrosis factor (TNF)-α, transforming growth factor (TGF)-β, and type III (PCIII), and I (PCI) procollagen in lung tissue, as well as increased expressions of TNF-α and monocyte chemoattractant protein (MCP)-1 in blood and BALF neutrophils. Monocyte (blood) and macrophage (adipose tissue) phagocytic capacities were lower in Obese-ALI compared to Control-ALI animals, and Obese animals exhibited reduced neutrophil migration compared to Control. Obese-ALI animals, compared to Obese-SAL, exhibited increased interventricular septum thickness (p = 0.003) and posterior wall thickness (p = 0.003) and decreased pulmonary acceleration time to pulmonary ejection time ratio (p = 0.005); no changes in lung mechanics, IL-6, TNF-α, TGF-β, PCIII, and PCI in lung tissue; increased IL-10 levels in lung homogenate (p = 0.007); reduced MCP-1 expression in blood neutrophils (p = 0.009); decreased TNF-α expression in blood (p = 0.02) and BALF (p = 0.008) neutrophils; and increased IL-10 expression in monocytes (p = 0.004). In conclusion, after endotoxin challenge, obese rats showed less deterioration of lung function, secondary to anti-inflammatory and anti-fibrotic effects, as well as changes in neutrophil and monocyte/macrophage phenotype in blood and BALF compared to Control rats.
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Affiliation(s)
- Lígia de A Maia
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fernanda F Cruz
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Milena V de Oliveira
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Cynthia S Samary
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcos Vinicius de S Fernandes
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Stefano de A A Trivelin
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Nazareth de N Rocha
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University, Niterói, Brazil
| | - Marcelo Gama de Abreu
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Therapy, University Hospital Dresden, Technische Universität Dresden, Dresden, Germany
| | - Paolo Pelosi
- Dipartimento di Scienze Chirurgiche e Diagnostiche Integrate, Università degli Studi di Genova, Genoa, Italy.,IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Pedro L Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Patricia R M Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Mogilenko DA, Haas JT, L'homme L, Fleury S, Quemener S, Levavasseur M, Becquart C, Wartelle J, Bogomolova A, Pineau L, Molendi-Coste O, Lancel S, Dehondt H, Gheeraert C, Melchior A, Dewas C, Nikitin A, Pic S, Rabhi N, Annicotte JS, Oyadomari S, Velasco-Hernandez T, Cammenga J, Foretz M, Viollet B, Vukovic M, Villacreces A, Kranc K, Carmeliet P, Marot G, Boulter A, Tavernier S, Berod L, Longhi MP, Paget C, Janssens S, Staumont-Sallé D, Aksoy E, Staels B, Dombrowicz D. Metabolic and Innate Immune Cues Merge into a Specific Inflammatory Response via the UPR. Cell 2019; 177:1201-1216.e19. [PMID: 31031005 DOI: 10.1016/j.cell.2019.03.018] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 01/27/2019] [Accepted: 03/08/2019] [Indexed: 01/22/2023]
Abstract
Innate immune responses are intricately linked with intracellular metabolism of myeloid cells. Toll-like receptor (TLR) stimulation shifts intracellular metabolism toward glycolysis, while anti-inflammatory signals depend on enhanced mitochondrial respiration. How exogenous metabolic signals affect the immune response is unknown. We demonstrate that TLR-dependent responses of dendritic cells (DCs) are exacerbated by a high-fatty-acid (FA) metabolic environment. FAs suppress the TLR-induced hexokinase activity and perturb tricarboxylic acid cycle metabolism. These metabolic changes enhance mitochondrial reactive oxygen species (mtROS) production and, in turn, the unfolded protein response (UPR), leading to a distinct transcriptomic signature with IL-23 as hallmark. Interestingly, chemical or genetic suppression of glycolysis was sufficient to induce this specific immune response. Conversely, reducing mtROS production or DC-specific deficiency in XBP1 attenuated IL-23 expression and skin inflammation in an IL-23-dependent model of psoriasis. Thus, fine-tuning of innate immunity depends on optimization of metabolic demands and minimization of mtROS-induced UPR.
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Affiliation(s)
- Denis A Mogilenko
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Joel T Haas
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Laurent L'homme
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Sébastien Fleury
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Sandrine Quemener
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Matthieu Levavasseur
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France; Department of Dermatology, CHU Lille, 59045 Lille, France
| | - Coralie Becquart
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France; Department of Dermatology, CHU Lille, 59045 Lille, France
| | - Julien Wartelle
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Alexandra Bogomolova
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Laurent Pineau
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Olivier Molendi-Coste
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Steve Lancel
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Hélène Dehondt
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Celine Gheeraert
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Aurelie Melchior
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Cédric Dewas
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Artemii Nikitin
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Samuel Pic
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - Nabil Rabhi
- University of Lille, EGID, CNRS, CHU Lille, Institut Pasteur de Lille, UMR 8199, 59019 Lille, France
| | - Jean-Sébastien Annicotte
- University of Lille, EGID, CNRS, CHU Lille, Institut Pasteur de Lille, UMR 8199, 59019 Lille, France
| | - Seiichi Oyadomari
- Fujii Memorial Institute of Medical Sciences, Institute of Advanced Medical Sciences, Tokushima University, Tokushima 770-8503, Japan
| | - Talia Velasco-Hernandez
- Department of Hematology, Institute for Clinical and Experimental Medicine, Linköping University, 58185 Linköping, Sweden
| | - Jörg Cammenga
- Department of Hematology, Institute for Clinical and Experimental Medicine, Linköping University, 58185 Linköping, Sweden
| | - Marc Foretz
- Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France; INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS, UMR8104, 75014 Paris, France
| | - Benoit Viollet
- Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France; INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS, UMR8104, 75014 Paris, France
| | - Milica Vukovic
- Centre for Haemato-Oncology, Barts, and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - Arnaud Villacreces
- Centre for Haemato-Oncology, Barts, and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - Kamil Kranc
- Centre for Haemato-Oncology, Barts, and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - Peter Carmeliet
- Laboratory of Angiogenesis and Vascular Metabolism, Center for Cancer Biology, VIB, 3000 Leuven, Belgium; Laboratory of Angiogenesis and Vascular Metabolism, Department of Oncology, University of Leuven, Leuven, 3000 Belgium
| | - Guillemette Marot
- Université Lille, MODAL Team, Inria Lille-Nord Europe, 59650 Villeneuve-d'Ascq, France
| | - Alexis Boulter
- University of Florida College of Medicine, Gainesville, FL 32610, USA
| | - Simon Tavernier
- Laboratory of Immunoregulation and Mucosal Immunology, VIB Center for Inflammation Research and Department of Internal Medicine and Pediatrics, Ghent University, 9052 Ghent, Belgium
| | - Luciana Berod
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, A Joint Venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Niedersachsen 30625, Germany
| | - Maria P Longhi
- William Harvey Research Institute, Barts, and the London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - Christophe Paget
- Université de Tours, INSERM, Centre d'Etude des Pathologies Respiratoires (CEPR), UMR 1100, 37041 Tours, France
| | - Sophie Janssens
- ER Stress and Inflammation, VIB Center for Inflammation Research, and Department of Internal Medicine and Pediatrics, Ghent University, 9052 Ghent, Belgium
| | - Delphine Staumont-Sallé
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France; Department of Dermatology, CHU Lille, 59045 Lille, France
| | - Ezra Aksoy
- Centre for Biochemical Pharmacology, William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, UK
| | - Bart Staels
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France
| | - David Dombrowicz
- University of Lille, EGID, INSERM, CHU Lille, Institut Pasteur de Lille, U1011, 59019 Lille, France.
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40
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Liang X, Gupta K, Quintero JR, Cernadas M, Kobzik L, Christou H, Pier GB, Owen CA, Çataltepe S. Macrophage FABP4 is required for neutrophil recruitment and bacterial clearance in Pseudomonas aeruginosa pneumonia. FASEB J 2019; 33:3562-3574. [PMID: 30462529 PMCID: PMC6988858 DOI: 10.1096/fj.201802002r] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 10/15/2018] [Indexed: 01/29/2023]
Abstract
Fatty acid binding protein 4 (FABP4), an intracellular lipid chaperone and adipokine, is expressed by lung macrophages, but the function of macrophage-FABP4 remains elusive. We investigated the role of FABP4 in host defense in a murine model of Pseudomonas aeruginosa pneumonia. Compared with wild-type (WT) mice, FABP4-deficient (FABP4-/-) mice exhibited decreased bacterial clearance and increased mortality when challenged intranasally with P. aeruginosa. These findings in FABP4-/- mice were associated with a delayed neutrophil recruitment into the lungs and were followed by greater acute lung injury and inflammation. Among leukocytes, only macrophages expressed FABP4 in WT mice with P. aeruginosa pneumonia. Chimeric FABP4-/- mice with WT bone marrow were protected from increased mortality seen in chimeric WT mice with FABP4-/- bone marrow during P. aeruginosa pneumonia, thus confirming the role of macrophages as the main source of protective FABP4 against that infection. There was less production of C-X-C motif chemokine ligand 1 (CXCL1) in FABP4-/- alveolar macrophages and lower airway CXCL1 levels in FABP4-/- mice. Delivering recombinant CXCL1 to the airways protected FABP4-/- mice from increased susceptibility to P. aeruginosa pneumonia. Thus, macrophage-FABP4 has a novel role in pulmonary host defense against P. aeruginosa infection by facilitating crosstalk between macrophages and neutrophils via regulation of macrophage CXCL1 production.-Liang, X., Gupta, K., Rojas Quintero, J., Cernadas, M., Kobzik, L., Christou, H., Pier, G. B., Owen, C. A., Çataltepe, S. Macrophage FABP4 is required for neutrophil recruitment and bacterial clearance in Pseudomonas aeruginosa pneumonia.
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Affiliation(s)
- Xiaoliang Liang
- Department of Pediatric Newborn Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Kushagra Gupta
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Joselyn Rojas Quintero
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Manuela Cernadas
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Lester Kobzik
- Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Helen Christou
- Department of Pediatric Newborn Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Gerald B. Pier
- Division of Infectious Diseases, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA; and
| | - Caroline A. Owen
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
- The Lovelace Respiratory Research Institute, Albuquerque, New Mexico, USA
| | - Sule Çataltepe
- Department of Pediatric Newborn Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
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41
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Bederman I, DiScenna A, Henderson L, Perez A, Klavanian J, Kovtun D, Collins O, Dunn J, Erokwu B, Flask CA, Drumm ML. Small adipose stores in cystic fibrosis mice are characterized by reduced cell volume, not cell number. Am J Physiol Gastrointest Liver Physiol 2018; 315:G943-G953. [PMID: 30188751 PMCID: PMC6336944 DOI: 10.1152/ajpgi.00096.2017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Cystic fibrosis (CF) is a lethal genetic disorder that affects many organ systems of the body, including various endocrine and exocrine tissues. Health and survival positively associate with body mass, and as a consequence, CF clinical care includes high-fat, high-calorie diets to maintain and increase adipose tissue stores. Such strategies have been implemented without a clear understanding of the cause and effect relationship between body mass and patients' health. Here, we used CF mouse models, which display small adipose stores, to begin examining body fat as a prelude into mechanistic studies of low body growth in CF, so that optimal therapeutic strategies could be developed. We reasoned that low adiposity must result from reduced number and/or volume of adipocytes. To determine relative contribution of either mechanism, we quantified volume of intraperitoneal and subcutaneous adipocytes. We found smaller, but not fewer, adipocytes in CF compared with wild-type (WT) animals. Specifically, intraperitoneal CF adipocytes were one-half the volume of WT cells, whereas subcutaneous cells were less affected by the Cftr genotype. No differences were found in cell types between CF and WT adipose tissues. Adipose tissue CFTR mRNA was detected, and we found greater CFTR expression in intraperitoneal depots as compared with subcutaneous samples. RNA sequencing revealed that CF adipose tissue exhibited lower expression of several key genes of adipocyte function ( Lep, Pck1, Fas, Jun), consistent with low triglyceride storage. The data indicate that CF adipocytes contain fewer triglycerides than WT cells, and a role for CFTR in these cells is proposed. NEW & NOTEWORTHY Adipocytes in cystic fibrosis mice exhibit smaller size due to low triglyceride storage. Adipocyte cell number per fat pad is similar, implying triglyceride storage problem. The absence of CFTR function in adipose tissue has been proposed as a direct link to low triglyceride storage in cystic fibrosis.
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Affiliation(s)
- Ilya Bederman
- 1Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio
| | - Alex DiScenna
- 1Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio
| | - Leigh Henderson
- 2Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, Ohio
| | - Aura Perez
- 1Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio
| | - Jeannie Klavanian
- 2Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, Ohio
| | - Daniel Kovtun
- 1Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio
| | - Olivia Collins
- 1Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio
| | - John Dunn
- 1Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio
| | - Bernadette Erokwu
- 3Department of Radiology, School of Medicine, Case Western Reserve University, Cleveland, Ohio
| | - Christopher A. Flask
- 3Department of Radiology, School of Medicine, Case Western Reserve University, Cleveland, Ohio,4Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Mitchell L. Drumm
- 1Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio,2Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, Ohio
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42
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Al-Anazi A, Parhar R, Saleh S, Al-Hijailan R, Inglis A, Al-Jufan M, Bazzi M, Hashmi S, Conca W, Collison K, Al-Mohanna F. Intracellular calcium and NF- kB regulate hypoxia-induced leptin, VEGF, IL-6 and adiponectin secretion in human adipocytes. Life Sci 2018; 212:275-284. [PMID: 30308181 DOI: 10.1016/j.lfs.2018.10.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 09/19/2018] [Accepted: 10/06/2018] [Indexed: 11/26/2022]
Abstract
AIMS Hypoxia-induced adipokine release has been attributed mainly to HIF-1α. Here we investigate the role of intracellular calcium and NF-kB in the hypoxia-dependent release of leptin, VEGF, IL-6 and the hypoxia-induced inhibition of adiponectin release in human adipocytes. MAIN METHODS We used intracellular calcium imaging to compare calcium status in preadipocytes and in adipocytes. We subjected both cell types to hypoxic conditions and measured the release of adipokines induced by hypoxia in the presence and absence of HIF-1α inhibitor YC-1, NF-κB inhibitor SN50 and intracellular calcium chelator BAPTA-AM. KEY FINDINGS We demonstrate reduced intracellular calcium oscillations and increased oxidative stress as the cells transitioned from preadipocytes to adipocytes. We show that differentiation of preadipocytes to adipocytes is associated with distinct morphological changes in the mitochondria. We also show that hypoxia-induced secretion of leptin, VEGF, IL-6 and hypoxia-induced inhibition of adiponectin secretion are independent of HIF-1α expression. The hypoxia-induced leptin, VEGF and IL-6 release are [Ca++]i dependent whereas adiponectin is NF-kB dependent. SIGNIFICANCE Our work suggests a major role for [Ca++]i in preadipocyte differentiation to adipocytes and that changes in mitochondrial morphology in the adipocytes might underlie the reduced calcium oscillations observed in the adipocytes. It also demonstrates that multiple signaling pathways are associated with the hypoxia-induced adipokine secretion.
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Affiliation(s)
- Azizah Al-Anazi
- Department of Cell Biology, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia
| | - Ranjit Parhar
- Department of Cell Biology, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia
| | - Soad Saleh
- Department of Cell Biology, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia
| | - Reem Al-Hijailan
- Department of Cell Biology, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia
| | - Angela Inglis
- Department of Cell Biology, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia
| | - Mansour Al-Jufan
- Heart Centre, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia
| | - Mohammed Bazzi
- Department of Biochemistry, College of Science, King Saud University, Riyadh 12372, Saudi Arabia
| | - Sarwar Hashmi
- Developmental Biology, Center for Vector Biology, Rutgers University, New Brunswick, NJ 08901, United States
| | - Walter Conca
- Department of Cell Biology, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia; Department of Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia; College of Medicine, Alfaisal University, Riyadh 11211, Saudi Arabia
| | - Kate Collison
- Department of Cell Biology, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia
| | - Futwan Al-Mohanna
- Department of Cell Biology, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia; College of Medicine, Alfaisal University, Riyadh 11211, Saudi Arabia.
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Thomsen HH, Rittig N, Johannsen M, Møller AB, Jørgensen JO, Jessen N, Møller N. Effects of 3-hydroxybutyrate and free fatty acids on muscle protein kinetics and signaling during LPS-induced inflammation in humans: anticatabolic impact of ketone bodies. Am J Clin Nutr 2018; 108:857-867. [PMID: 30239561 DOI: 10.1093/ajcn/nqy170] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 06/29/2018] [Indexed: 12/29/2022] Open
Abstract
Background Acute inflammation, and subsequent release of bacterial products (e.g. LPS), inflammatory cytokines, and stress hormones, is catabolic, and the loss of lean body mass predicts morbidity and mortality. Lipid intermediates may reduce protein loss, but the roles of free fatty acids (FFAs) and ketone bodies during acute inflammation are unclear. Objective We aimed to test whether infusions of 3-hydroxybutyrate (3OHB), FFAs, and saline reduce protein catabolism during exposure to LPS and Acipimox (to restrict and control endogenous lipolysis). Design A total of 10 healthy male subjects were randomly tested 3 times, with: 1) LPS, Acipimox (Olbetam) and saline, 2) LPS, Acipimox, and nonesterified fatty acids (Intralipid), and 3) LPS, Acipimox, and 3OHB, during a 5-h basal period and a 2-h hyperinsulinemic, euglycemic clamp. Labeled phenylalanine, tyrosine, and urea tracers were used to estimate protein kinetics, and muscle biopsies were taken for Western blot analysis of protein metabolic signaling. Results 3OHB infusion increased 3OHB concentrations (P < 0.0005) to 3.5 mM and decreased whole-body phenylalanine-to-tyrosine degradation. Basal and insulin-stimulated net forearm phenylalanine release decreased by >70% (P < 0.005), with both appearance and phenylalanine disappearance being profoundly decreased. Phosphorylation of eukaryotic initiation factor 2α at Ser51 was increased in skeletal muscle, and S6 kinase phosphorylation at Ser235/236 tended (P = 0.074) to be decreased with 3OHB infusion (suggesting inhibition of protein synthesis), whereas no detectable effects were seen on markers of protein breakdown. Lipid infusion did not affect phenylalanine kinetics, and insulin sensitivity was unaffected by interventions. Conclusion During acute inflammation, 3OHB has potent anticatabolic actions in muscle and at the whole-body level; in muscle, reduction of protein breakdown overrides inhibition of synthesis. This trial was registered at clinicaltrials.gov as NCT01752348.
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Affiliation(s)
- Henrik H Thomsen
- Department of Medicine, Viborg Regional Hospital, Viborg, Denmark.,Department of Internal Medicine and Endocrinology MEA, Aarhus University, Aarhus, Denmark
| | - Nikolaj Rittig
- Department of Internal Medicine and Endocrinology MEA, Aarhus University, Aarhus, Denmark
| | - Mogens Johannsen
- Department of Forensic Medicine, Bioanalytical Unit, Aarhus University, Aarhus, Denmark
| | - Andreas B Møller
- Research Laboratory for Biochemical Pathology, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Jens Otto Jørgensen
- Department of Internal Medicine and Endocrinology MEA, Aarhus University, Aarhus, Denmark
| | - Niels Jessen
- Research Laboratory for Biochemical Pathology, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.,Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Clinical Pharmacology, Aarhus University, Aarhus, Denmark
| | - Niels Møller
- Department of Internal Medicine and Endocrinology MEA, Aarhus University, Aarhus, Denmark
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Van Wyngene L, Vandewalle J, Libert C. Reprogramming of basic metabolic pathways in microbial sepsis: therapeutic targets at last? EMBO Mol Med 2018; 10:e8712. [PMID: 29976786 PMCID: PMC6079534 DOI: 10.15252/emmm.201708712] [Citation(s) in RCA: 150] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 04/27/2018] [Accepted: 05/25/2018] [Indexed: 12/15/2022] Open
Abstract
Sepsis is a highly lethal and urgent unmet medical need. It is the result of a complex interplay of several pathways, including inflammation, immune activation, hypoxia, and metabolic reprogramming. Specifically, the regulation and the impact of the latter have become better understood in which the highly catabolic status during sepsis and its similarity with starvation responses appear to be essential in the poor prognosis in sepsis. It seems logical that new interventions based on the recognition of new therapeutic targets in the key metabolic pathways should be developed and may have a good chance to penetrate to the bedside. In this review, we concentrate on the pathological changes in metabolism, observed during sepsis, and the presumed underlying mechanisms, with a focus on the level of the organism and the interplay between different organ systems.
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Affiliation(s)
- Lise Van Wyngene
- Center for Inflammation Research, VIB, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Jolien Vandewalle
- Center for Inflammation Research, VIB, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Claude Libert
- Center for Inflammation Research, VIB, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
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45
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Meidan E, Kolesnikov Y, Tirosh O. High Fat Diets Composed of Palm Stearin and Olive Oil Equally Exacerbate Liver Inflammatory Damage and Metabolic Stress in Mice. Mol Nutr Food Res 2018; 62:e1700915. [PMID: 29733507 DOI: 10.1002/mnfr.201700915] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 04/22/2018] [Indexed: 12/15/2022]
Abstract
SCOPE People with fatty liver could be subject to acute infections such as sepsis. The aim of the study is to evaluate the effect of high fat diets (HFD) of olive oil and palm stearin on liver inflammation induced by lipopolysaccharides (LPS). METHODS AND RESULTS C57BL/6J male mice were treated with high fat diets with different sources of oils: palm stearin and olive oil for 8 weeks followed by LPS injection. The proinflammatory effect of olive oil was also studied using gavage treatment and IP injection of LPS. Animals fed with HFDs showed an increase in body weight, elevated blood glucose levels, and fatty liver phenotype. HFDs aggravated the effect of LPS treatment to induce inflammatory response compared to low fat diet (LFD) effect. Following HFD supplementation, LPS induced hyperinsulinemia, more liver damage than in animals that consumed LFD. In addition, both gavage and long-term feeding with high lipids in the presence of LPS resulted in inhibition of gluconeogenic genes expression. CONCLUSION HFDs of both monounsaturated and saturated fat potentiated liver inflammation induced by LPS treatment indicate that the total amount of fat consumed is the main proinflammatory factor rather than the type of fat.
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Affiliation(s)
- Elena Meidan
- Institute of Biochemistry, Food Science and Nutrition, Hebrew University of Jerusalem, Rehovot, 7610001, Israel
| | - Yula Kolesnikov
- Institute of Biochemistry, Food Science and Nutrition, Hebrew University of Jerusalem, Rehovot, 7610001, Israel
| | - Oren Tirosh
- Institute of Biochemistry, Food Science and Nutrition, Hebrew University of Jerusalem, Rehovot, 7610001, Israel
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Rittig N, Svart M, Jessen N, Møller N, Møller HJ, Grønbæk H. Macrophage activation marker sCD163 correlates with accelerated lipolysis following LPS exposure: a human-randomised clinical trial. Endocr Connect 2018; 7:107-114. [PMID: 29295869 PMCID: PMC5754508 DOI: 10.1530/ec-17-0296] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 11/27/2017] [Indexed: 12/16/2022]
Abstract
BACKGROUND Macrophage activation determined by levels of soluble sCD163 is associated with obesity, insulin resistance, diabetes mellitus type 2 (DM2) and non-alcoholic fatty liver disease (NAFLD). This suggests that macrophage activation is involved in the pathogenesis of conditions is characterised by adaptions in the lipid metabolism. Since sCD163 is shed to serum by inflammatory signals including lipopolysaccharides (LPS, endotoxin), we investigated sCD163 and correlations with lipid metabolism following LPS exposure. METHODS Eight healthy male subjects were investigated on two separate occasions: (i) following an LPS exposure and (ii) following saline exposure. Each study day consisted of a four-hour non-insulin-stimulated period followed by a two-hour hyperinsulinemic euglycemic clamp period. A 3H-palmitate tracer was used to calculate the rate of appearance (Rapalmitate). Blood samples were consecutively obtained throughout each study day. Abdominal subcutaneous adipose tissue was obtained for western blotting. RESULTS We observed a significant two-fold increase in plasma sCD163 levels following LPS exposure (P < 0.001), and sCD163 concentrations correlated positively with the plasma concentration of free fatty acids, Rapalmitate, lipid oxidation rates and phosphorylation of the hormone-sensitive lipase at serine 660 in adipose tissue (P < 0.05, all). Furthermore, sCD163 concentrations correlated positively with plasma concentrations of cortisol, glucagon, tumour necrosis factor (TNF)-α, interleukin (IL)-6 and IL-10 (P < 0.05, all). CONCLUSION We observed a strong correlation between sCD163 and stimulation of lipolysis and fat oxidation following LPS exposure. These findings support preexisting theory that inflammation and macrophage activation play a significant role in lipid metabolic adaptions under conditions such as obesity, DM2 and NAFLD.
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Affiliation(s)
- Nikolaj Rittig
- Department of Internal Medicine and Endocrinology (MEA) and Medical Research LaboratoryAarhus University Hospital, Aarhus C, Denmark
| | - Mads Svart
- Department of Internal Medicine and Endocrinology (MEA) and Medical Research LaboratoryAarhus University Hospital, Aarhus C, Denmark
| | - Niels Jessen
- Research Laboratory for Biochemical PathologyInstitute for Clinical Medicine, Aarhus University Hospital, Aarhus C, Denmark
| | - Niels Møller
- Department of Internal Medicine and Endocrinology (MEA) and Medical Research LaboratoryAarhus University Hospital, Aarhus C, Denmark
| | - Holger J Møller
- Department of Clinical Biochemistry Aarhus University HospitalAarhus C, Denmark
| | - Henning Grønbæk
- Department of Hepatology and GastroenterologyAarhus University Hospital, Aarhus C, Denmark
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47
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Pastel E, Price E, Sjöholm K, McCulloch LJ, Rittig N, Liversedge N, Knight B, Møller N, Svensson PA, Kos K. Lysyl oxidase and adipose tissue dysfunction. Metabolism 2018; 78:118-127. [PMID: 29051043 DOI: 10.1016/j.metabol.2017.10.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/01/2017] [Accepted: 10/05/2017] [Indexed: 12/17/2022]
Abstract
BACKGROUND/OBJECTIVES Lysyl oxidase (LOX) is an enzyme crucial for collagen fibre crosslinking and thus for fibrosis development. Fibrosis is characterised by a surplus of collagen fibre accumulation and is amongst others also a feature of obesity-associated dysfunctional adipose tissue (AT) which has been linked with type 2 diabetes. We hypothesised that in type 2 diabetes and obesity LOX expression and activity will be increased as a consequence of worsening AT dysfunction. This study aimed to provide a comprehensive characterisation of LOX in human AT. METHODS LOX mRNA expression was analysed in omental and abdominal subcutaneous AT obtained during elective surgery from subjects with a wide range of BMI, with and without diabetes. In addition, LOX expression was studied in subcutaneous AT before and 9.5months after bariatric surgery. To study the mechanism of LOX changes, its expression and activity were assessed after either hypoxia, recombinant human leptin or glucose treatment of AT explants. In addition, LOX response to acute inflammation was tested after stimulation by a single injection of lipopolysaccharide versus saline solution (control) in healthy men, in vivo. Quantity of mRNA was measured by RT-qPCR. RESULTS LOX expression was higher in obesity and correlated with BMI whilst, in vitro, leptin at high concentrations, as a potential feedback mechanism, suppressed its expression. Neither diabetes status, nor hyperglycaemia affected LOX. Hypoxia and lipopolysaccharide-induced acute inflammation increased LOX AT expression, latter was independent of macrophage infiltration. CONCLUSIONS Whilst LOX may not be affected by obesity-associated complications such as diabetes, our results confirm that LOX is increased by hypoxia and inflammation as underlying mechanism for its upregulation in adipose tissue with obesity.
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Affiliation(s)
- Emilie Pastel
- Diabetes and Obesity Research Group, University of Exeter Medical School, Exeter, UK
| | - Emily Price
- Diabetes and Obesity Research Group, University of Exeter Medical School, Exeter, UK
| | - Kajsa Sjöholm
- Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Laura J McCulloch
- Diabetes and Obesity Research Group, University of Exeter Medical School, Exeter, UK
| | - Nikolaj Rittig
- Department of Internal Medicine and Endocrinology, Aarhus University Hospital, Aarhus, Denmark
| | | | - Bridget Knight
- RD&E NHS Foundation Trust, Exeter, UK; NIHR Exeter Clinical Research Facility, University of Exeter Medical School, Exeter, UK
| | - Niels Møller
- Department of Internal Medicine and Endocrinology, Aarhus University Hospital, Aarhus, Denmark
| | - Per-Arne Svensson
- Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Katarina Kos
- Diabetes and Obesity Research Group, University of Exeter Medical School, Exeter, UK.
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48
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Molfino A, Alessandri F, Mosillo P, Dell'Utri D, Farcomeni A, Amabile MI, Laviano A. PTEN expression and its association with glucose control and calorie supplementation in critically ill patients. Clin Nutr 2017; 37:2186-2190. [PMID: 29154111 DOI: 10.1016/j.clnu.2017.10.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 08/07/2017] [Accepted: 10/28/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND & AIM Phosphatase and tensin homologue (PTEN) reduces insulin sensitivity. Since critically ill patients present insulin resistance, we aimed at assessing the role of PTEN expression on glucose homeostasis and clinical outcome in patients admitted to an intensive care unit (ICU) and receiving artificial nutrition. METHODS Observational, single-center study conducted in one ICU in Rome, Italy on adult patients hospitalized for trauma. Plasma glucose levels and its variability were recorded in patients receiving artificial nutrition. PTEN expression was measured by western blotting analysis and the associations between PTEN, plasma glucose levels and variability, and calories administered were investigated. Parametric and non-parametric tests were used, as appropriate. RESULTS Twenty consecutive patients (13 men and 7 women, mean age of 37.3 ± 12.7 years) were studied. No correlation between plasma glucose and PTEN was documented (r = -0.15, P = 0.55), neither between glycemic variability and PTEN expression (r = -0.00, P = 0.99). However, total kcal/day administered and PTEN expression significantly correlated (r = 0.56, P = 0.01). Also, patients with PTEN levels below the median received less kcal/day than those with PTEN above the median (P = 0.048). This association was more pronounced when normalized per body weight (P = 0.03) and after adjusting for the average of insulin daily administered (P = 0.02). CONCLUSIONS PTEN expression might significantly contribute to glucose homeostasis and disposal in critically ill patients receiving artificial nutrition. Larger samples are necessary to confirm our observation. CLINICAL TRIAL REGISTRY NUMBER NCT01796847 (www.clinicaltrials.gov) submitted on February 11, 2013.
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Affiliation(s)
- Alessio Molfino
- Department of Clinical Medicine, Sapienza University of Rome, Italy.
| | - Francesco Alessandri
- Department of Cardiovascular, Respiratory, Nephrology, Anesthesiology and Geriatric Sciences, Sapienza University of Rome, Italy.
| | - Paola Mosillo
- Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, Italy.
| | - Donatella Dell'Utri
- Department of Cardiovascular, Respiratory, Nephrology, Anesthesiology and Geriatric Sciences, Sapienza University of Rome, Italy.
| | - Alessio Farcomeni
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy.
| | - Maria Ida Amabile
- Department of Clinical Medicine, Sapienza University of Rome, Italy.
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Chen YC, Travers RL, Walhin JP, Gonzalez JT, Koumanov F, Betts JA, Thompson D. Feeding influences adipose tissue responses to exercise in overweight men. Am J Physiol Endocrinol Metab 2017; 313:E84-E93. [PMID: 28292758 DOI: 10.1152/ajpendo.00006.2017] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 02/22/2017] [Accepted: 03/09/2017] [Indexed: 01/04/2023]
Abstract
Feeding profoundly affects metabolic responses to exercise in various tissues, but the effect of feeding status on human adipose tissue responses to exercise has never been studied. Ten healthy overweight men aged 26 ± 5 yr (mean ± SD) with a waist circumference of 105 ± 10 cm walked at 60% of maximum oxygen uptake under either fasted or fed conditions in a randomized, counterbalanced design. Feeding comprised 648 ± 115 kcal 2 h before exercise. Blood samples were collected at regular intervals to examine changes in metabolic parameters and adipokine concentrations. Adipose tissue samples were obtained at baseline and 1 h after exercise to examine changes in adipose tissue mRNA expression and secretion of selected adipokines ex vivo. Adipose tissue mRNA expression of pyruvate dehydrogenase kinase isozyme 4 (PDK4), adipose triglyceride lipase, hormone-sensitive lipase (HSL), fatty acid translocase/CD36, glucose transporter type 4 (GLUT4), and insulin receptor substrate 2 (IRS2) in response to exercise were lower in fed compared with fasted conditions (all P ≤ 0.05). Postexercise adipose IRS2 protein was affected by feeding (P ≤ 0.05), but Akt2, AMPK, IRS1, GLUT4, PDK4, and HSL protein levels were not different. Feeding status did not impact serum and ex vivo adipose secretion of IL-6, leptin, or adiponectin in response to exercise. This is the first study to show that feeding before acute exercise affects postexercise adipose tissue gene expression, and we propose that feeding is likely to blunt long-term adipose tissue adaptation to regular exercise.
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Affiliation(s)
- Yung-Chih Chen
- Department for Health, University of Bath, Bath, United Kingdom
| | | | | | | | | | - James A Betts
- Department for Health, University of Bath, Bath, United Kingdom
| | - Dylan Thompson
- Department for Health, University of Bath, Bath, United Kingdom
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