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Khalaf F, Ricciuti Z, Barayan D, Wojtowicz-Piotrowski S, Jeschke MG. Post-burn endocrine-immune dynamics and ageing considerations. Nat Rev Endocrinol 2024:10.1038/s41574-024-01018-3. [PMID: 38982289 DOI: 10.1038/s41574-024-01018-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Affiliation(s)
- Fadi Khalaf
- Department of Biochemistry, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
- David Braley Research Institute, Hamilton, Ontario, Canada
- Hamilton Health Sciences, Hamilton, Ontario, Canada
| | - Zachary Ricciuti
- David Braley Research Institute, Hamilton, Ontario, Canada
- Hamilton Health Sciences, Hamilton, Ontario, Canada
- Department of Medical Sciences, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Dalia Barayan
- David Braley Research Institute, Hamilton, Ontario, Canada
- Hamilton Health Sciences, Hamilton, Ontario, Canada
- Department of Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Stephanie Wojtowicz-Piotrowski
- David Braley Research Institute, Hamilton, Ontario, Canada
- Hamilton Health Sciences, Hamilton, Ontario, Canada
- Department of Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Marc G Jeschke
- Department of Biochemistry, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada.
- David Braley Research Institute, Hamilton, Ontario, Canada.
- Hamilton Health Sciences, Hamilton, Ontario, Canada.
- Department of Medical Sciences, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada.
- Department of Surgery, McMaster University, Hamilton, Ontario, Canada.
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Li R, Liu Y, Wu J, Chen X, Lu Q, Xia K, Liu C, Sui X, Liu Y, Wang Y, Qiu Y, Chen J, Wang Y, Li R, Ba Y, Fang J, Huang W, Lu Z, Li Y, Liao X, Xiang AP, Huang Y. Adaptive Metabolic Responses Facilitate Blood-Brain Barrier Repair in Ischemic Stroke via BHB-Mediated Epigenetic Modification of ZO-1 Expression. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2400426. [PMID: 38666466 PMCID: PMC11220715 DOI: 10.1002/advs.202400426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 04/11/2024] [Indexed: 07/04/2024]
Abstract
Adaptive metabolic responses and innate metabolites hold promising therapeutic potential for stroke, while targeted interventions require a thorough understanding of underlying mechanisms. Adiposity is a noted modifiable metabolic risk factor for stroke, and recent research suggests that it benefits neurological rehabilitation. During the early phase of experimental stroke, the lipidomic results showed that fat depots underwent pronounced lipolysis and released fatty acids (FAs) that feed into consequent hepatic FA oxidation and ketogenesis. Systemic supplementation with the predominant ketone beta-hydroxybutyrate (BHB) is found to exert discernible effects on preserving blood-brain barrier (BBB) integrity and facilitating neuroinflammation resolution. Meanwhile, blocking FAO-ketogenesis processes by administration of CPT1α antagonist or shRNA targeting HMGCS2 exacerbated endothelial damage and aggravated stroke severity, whereas BHB supplementation blunted these injuries. Mechanistically, it is unveiled that BHB infusion is taken up by monocarboxylic acid transporter 1 (MCT1) specifically expressed in cerebral endothelium and upregulated the expression of tight junction protein ZO-1 by enhancing local β-hydroxybutyrylation of H3K9 at the promoter of TJP1 gene. Conclusively, an adaptive metabolic mechanism is elucidated by which acute lipolysis stimulates FAO-ketogenesis processes to restore BBB integrity after stroke. Ketogenesis functions as an early metabolic responder to restrain stroke progression, providing novel prospectives for clinical translation.
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Bieerkehazhi S, Barayan D, Khalaf F, de Brito Monteiro L, Aijaz A, Volk C, Matveev A, Saldanha S, Faour S, Jeschke MG. BURNS INDUCE ALTERATIONS IN THE ACYL PROTEOME OF MICE AND HUMANS. Shock 2024; 61:877-884. [PMID: 38661185 DOI: 10.1097/shk.0000000000002355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
ABSTRACT Hypermetabolic reprogramming triggered by thermal injury causes substantial morbidity and mortality. Despite the therapeutic potential of targeting this response, the underlying mechanisms remain poorly understood. Interestingly, protein S-acylation is a reversible posttranslational modification induced by metabolic alterations via DHHC acyltransferases. While this modification aids in the regulation of cellular functions, deregulated S-acylation contributes to various diseases by altering protein structure, stability, and localization. However, whether and how S-acylation may impact morbidity and mortality during postburn hypermetabolism is unknown. In this study, we discovered that alterations in the acyl proteome play a key role in mediating adverse outcomes that occur after burn injury. Using a murine model, we show that burn injury induces profound changes in the expression of various DHHC isoforms in metabolic organs central to regulating postburn hypermetabolism, the adipose tissue, and liver. This was accompanied by increased levels of S-acylated proteins in several pathways involved in mediating the adverse hypermetabolic response, including ER stress, lipolysis, and browning. In fact, similar results were also observed in adipose tissue from severely burned patients, as reflected by increased S-acylation of ERK1/2, eIF2a, ATGL, FGF21, and UCP1 relative to nonburn controls. Importantly, pharmacologically targeting this posttranslational modification using a nonselective DHHC inhibitor effectively attenuated burn-induced ER stress, lipolysis, and browning induction in an ex vivo explant model. Together, these findings suggest that S-acylation may facilitate the protein activation profile that drives burn-induced hypermetabolism and that targeting it could potentially be an effective strategy to restore metabolic function and improve outcomes after injury.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Sara Faour
- David Braley Research Institute, Hamilton, Ontario, Canada
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Nguyen TT, Corvera S. Adipose tissue as a linchpin of organismal ageing. Nat Metab 2024; 6:793-807. [PMID: 38783156 PMCID: PMC11238912 DOI: 10.1038/s42255-024-01046-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 04/10/2024] [Indexed: 05/25/2024]
Abstract
Ageing is a conserved biological process, modulated by intrinsic and extrinsic factors, that leads to changes in life expectancy. In humans, ageing is characterized by greatly increased prevalence of cardiometabolic disease, type 2 diabetes and disorders associated with impaired immune surveillance. Adipose tissue displays species-conserved, temporal changes with ageing, including redistribution from peripheral to central depots, loss of thermogenic capacity and expansion within the bone marrow. Adipose tissue is localized to discrete depots, and also diffusely distributed within multiple organs and tissues in direct proximity to specialized cells. Thus, through their potent endocrine properties, adipocytes are capable of modulating tissue and organ function throughout the body. In addition to adipocytes, multipotent progenitor/stem cells in adipose tissue play a crucial role in maintenance and repair of tissues throughout the lifetime. Adipose tissue may therefore be a central driver for organismal ageing and age-associated diseases. Here we review the features of adipose tissue during ageing, and discuss potential mechanisms by which these changes affect whole-body metabolism, immunity and longevity. We also explore the potential of adipose tissue-targeted therapies to ameliorate age-associated disease burdens.
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Affiliation(s)
- Tammy T Nguyen
- Department of Surgery, Division of Vascular Surgery, UMass Memorial Medical Center, Worcester, MA, USA
- Diabetes Center of Excellence, UMass Chan Medical School, Worcester, MA, USA
| | - Silvia Corvera
- Diabetes Center of Excellence, UMass Chan Medical School, Worcester, MA, USA.
- Morningside Graduate School of Biomedical Sciences, UMass Chan Medical School, Worcester, MA, USA.
- Program in Molecular Medicine, UMass Chan Medical School, Worcester, MA, USA.
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Knuth CM, Barayan D, Lee JH, Auger C, de Brito Monteiro L, Ricciuti Z, Metko D, Wells L, Sung HK, Screaton RA, Jeschke MG. Subcutaneous white adipose tissue independently regulates burn-induced hypermetabolism via immune-adipose crosstalk. Cell Rep 2024; 43:113584. [PMID: 38117653 PMCID: PMC10845122 DOI: 10.1016/j.celrep.2023.113584] [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: 02/21/2023] [Revised: 09/22/2023] [Accepted: 11/29/2023] [Indexed: 12/22/2023] Open
Abstract
Severe burns induce a chronic hypermetabolic state that persists well past wound closure, indicating that additional internal mechanisms must be involved. Adipose tissue is suggested to be a central regulator in perpetuating hypermetabolism, although this has not been directly tested. Here, we show that thermogenic adipose tissues are activated in parallel to increases in hypermetabolism independent of cold stress. Using an adipose tissue transplantation model, we discover that burn-derived subcutaneous white adipose tissue alone is sufficient to invoke a hypermetabolic response in a healthy recipient mouse. Concomitantly, transplantation of healthy adipose tissue alleviates metabolic dysfunction in a burn recipient. We further show that the nicotinic acetylcholine receptor signaling pathway may mediate an immune-adipose crosstalk to regulate adipose tissue remodeling post-injury. Targeting this pathway could lead to innovative therapeutic interventions to counteract hypermetabolic pathologies.
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Affiliation(s)
- Carly M Knuth
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Dalia Barayan
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Ju Hee Lee
- Translational Medicine Program, The Hospital for Sick Children, Toronto, ON M5G 0A4 Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Christopher Auger
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA
| | | | | | - Dea Metko
- Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Lisa Wells
- Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada
| | - Hoon-Ki Sung
- Translational Medicine Program, The Hospital for Sick Children, Toronto, ON M5G 0A4 Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Robert A Screaton
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada; Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Marc G Jeschke
- Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada; David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, ON L8L 2X2, Canada; Hamilton General Hospital, Hamilton Health Sciences, Hamilton, ON L8L 2X2, Canada; Department of Surgery, McMaster University, Hamilton, ON L8S 4K1, Canada.
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Efejuku TA, Obanigba G, Johnson D, Obi A, Hallman T, Song J, El Ayadi A, Raji M, Wolf SE. Impact of pre-burn statin use on metabolic and cardiovascular disorders. Am J Surg 2023; 226:485-491. [PMID: 37330384 DOI: 10.1016/j.amjsurg.2023.06.003] [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: 03/29/2023] [Revised: 05/08/2023] [Accepted: 06/01/2023] [Indexed: 06/19/2023]
Abstract
INTRODUCTION Statins are among the most widely prescribed medications with proven effectiveness in patients with hyperlipidemia and atherosclerotic cardiovascular diseases. We investigated the relationship between statin use, metabolic and cardiovascular outcomes after burn. METHODS We utilized data from the TriNetX electronic health database. Burn patients with prior statin use were compared to patients without prior use and analyzed the occurrence of metabolic and cardiovascular disorders. RESULTS Prior statin use burn patients were 1.33 times as likely to develop hyperglycemia, 1.20 times for cardiac arrhythmia, 1.70 times for coronary artery disease (CAD), 1.10 times for sepsis, and 0.80 times for death. High percent TBSA burn, male sex, and lipophilic statin use were associated with higher odds of outcome development. CONCLUSION Prior statin use in severely burned patients is associated with an increased risk of developing hyperglycemia, arrhythmias, and CAD, with higher odds in males, higher TBSA burn, and lipophilic statin users.
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Affiliation(s)
- Tsola A Efejuku
- School of Medicine, University of Texas Medical Branch, Galveston, TX, USA.
| | - Grace Obanigba
- School of Medicine, University of Texas Medical Branch, Galveston, TX, USA.
| | - Dominique Johnson
- School of Medicine, University of Texas Medical Branch, Galveston, TX, USA.
| | - Ann Obi
- School of Medicine, University of Texas Medical Branch, Galveston, TX, USA.
| | - Taylor Hallman
- School of Medicine, University of Texas Medical Branch, Galveston, TX, USA.
| | - Juquan Song
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA.
| | - Amina El Ayadi
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA.
| | - Mukaila Raji
- Division of Geriatric & Palliative Medicine, University of Texas Medical Branch, Galveston, TX, USA.
| | - Steven E Wolf
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA.
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Abstract
Rather than serving as a mere onlooker, adipose tissue is a complex endocrine organ and active participant in disease initiation and progression. Disruptions of biological processes operating within adipose can disturb healthy systemic physiology, the sequelae of which include metabolic disorders such as obesity and type 2 diabetes. A burgeoning interest in the field of adipose research has allowed for the elucidation of regulatory networks underlying both adipose tissue function and dysfunction. Despite this progress, few diseases are treated by targeting maladaptation in the adipose, an oft-overlooked organ. In this review, we elaborate on the distinct subtypes of adipocytes, their developmental origins and secretory roles, and the dynamic interplay at work within the tissue itself. Central to this discussion is the relationship between adipose and disease states, including obesity, cachexia, and infectious diseases, as we aim to leverage our wealth of knowledge for the development of novel and targeted therapeutics.
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Affiliation(s)
- Christopher Auger
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA;
| | - Shingo Kajimura
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA; .,Howard Hughes Medical Institute, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA;
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Demir Yigit Y, Yigit E. THE EFFECT OF AGING ON THE DEMOGRAPHIC, INJURY AND HEALING PATTERNS OF BURN PATIENTS. SANAMED 2022. [DOI: 10.24125/sanamed.v16i3.520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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