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Hu Y, Huang Y, Jiang Y, Weng L, Cai Z, He B. The Different Shades of Thermogenic Adipose Tissue. Curr Obes Rep 2024; 13:440-460. [PMID: 38607478 DOI: 10.1007/s13679-024-00559-y] [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] [Accepted: 03/12/2024] [Indexed: 04/13/2024]
Abstract
PURPOSE OF REVIEW By providing a concise overview of adipose tissue types, elucidating the regulation of adipose thermogenic capacity in both physiological contexts and chronic wasting diseases (a protracted hypermetabolic state that precipitates sustained catabolism and consequent progressive corporeal atrophy), and most importantly, delving into the ongoing discourse regarding the role of adipose tissue thermogenic activation in chronic wasting diseases, this review aims to provide researchers with a comprehensive understanding of the field. RECENT FINDINGS Adipose tissue, traditionally classified as white, brown, and beige (brite) based on its thermogenic activity and potential, is intricately regulated by complex mechanisms in response to exercise or cold exposure. This regulation is adipose depot-specific and dependent on the duration of exposure. Excessive thermogenic activation of adipose tissue has been observed in chronic wasting diseases and has been considered a pathological factor that accelerates disease progression. However, this conclusion may be confounded by the detrimental effects of excessive lipolysis. Recent research also suggests that such activation may play a beneficial role in the early stages of chronic wasting disease and provide potential therapeutic effects. A more comprehensive understanding of the changes in adipose tissue thermogenesis under physiological and pathological conditions, as well as the underlying regulatory mechanisms, is essential for the development of novel interventions to improve health and prevent disease.
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Affiliation(s)
- Yunwen Hu
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China
| | - Yijie Huang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China
| | - Yangjing Jiang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China
| | - Lvkan Weng
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China.
| | - Zhaohua Cai
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China.
| | - Ben He
- Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China.
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Murao A, Jha A, Aziz M, Wang P. An engineered poly(A) tail attenuates gut ischemia/reperfusion-induced acute lung injury. Surgery 2024; 175:1346-1351. [PMID: 38342730 PMCID: PMC11001521 DOI: 10.1016/j.surg.2024.01.002] [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: 09/12/2023] [Revised: 12/28/2023] [Accepted: 01/02/2024] [Indexed: 02/13/2024]
Abstract
BACKGROUND Gut ischemia/reperfusion causes the release of damage-associated molecular patterns, leading to acute lung injury and high mortality. Cold-inducible ribonucleic acid-binding protein is a ribonucleic acid chaperon that binds the polyadenylation tail of messenger ribonucleic acid intracellularly. Upon cell stress, cold-inducible ribonucleic acid-binding protein is released, and extracellular cold-inducible ribonucleic acid-binding protein acts as a damage-associated molecular pattern, worsening inflammation. To inhibit extracellular cold-inducible ribonucleic acid-binding protein, we have recently developed an engineered polyadenylation tail named A12. Here, we sought to investigate the therapeutic potential of A12 in gut ischemia/reperfusion-induced acute lung injury. METHODS Male C57BL6/J mice underwent superior mesenteric artery occlusion and were treated with intraperitoneal A12 (0.5 nmol/g body weight) or vehicle at the time of reperfusion. Blood and lungs were collected 4 hours after gut ischemia/reperfusion. Systemic levels of extracellular cold-inducible ribonucleic acid-binding protein, interleukin-6, aspartate transaminase, alanine transaminase, and lactate dehydrogenase were determined. The pulmonary gene expression of cytokines (interleukin-6, interleukin-1β) and chemokines (macrophage-inflammatory protein-2, keratinocyte-derived chemokine) was also assessed. In addition, lung myeloperoxidase, injury score, and cell death were determined. Mice were monitored for 48 hours after gut ischemia/reperfusion for survival assessment. RESULTS Gut ischemia/reperfusion significantly increased the serum extracellular cold-inducible ribonucleic acid-binding protein levels. A12 treatment markedly reduced the elevated serum interleukin-6, alanine transaminase, aspartate transaminase, and lactate dehydrogenase by 53%, 23%, 23%, and 24%, respectively, in gut ischemia/reperfusion mice. A12 also significantly decreased cytokine and chemokine messenger ribonucleic acids and myeloperoxidase activity in the lungs of gut ischemia/reperfusion mice. Histological analysis revealed that A12 attenuated tissue injury and cell death in the lungs of gut ischemia/reperfusion mice. Finally, administration of A12 markedly improved the survival of gut ischemia/reperfusion mice. CONCLUSION A12, a novel extracellular cold-inducible ribonucleic acid-binding protein inhibitor, diminishes inflammation and mitigates acute lung injury when employed as a treatment during gut ischemia/reperfusion. Hence, the targeted approach toward extracellular cold-inducible ribonucleic acid-binding protein emerges as a promising therapeutic strategy for alleviating gut ischemia/reperfusion-induced acute lung injury.
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Affiliation(s)
- Atsushi Murao
- Center for Immunology and Inflammation, The Feinstein Institutes for Medical Research, Manhasset, NY
| | - Alok Jha
- Center for Immunology and Inflammation, The Feinstein Institutes for Medical Research, Manhasset, NY
| | - Monowar Aziz
- Center for Immunology and Inflammation, The Feinstein Institutes for Medical Research, Manhasset, NY; Departments of Surgery and Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY
| | - Ping Wang
- Center for Immunology and Inflammation, The Feinstein Institutes for Medical Research, Manhasset, NY; Departments of Surgery and Molecular Medicine, Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY.
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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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Bhattachan P, Jeschke MG. SINGLE-CELL TRANSCRIPTOME ANALYSIS IN HEALTH AND DISEASE. Shock 2024; 61:19-27. [PMID: 37962963 PMCID: PMC10883422 DOI: 10.1097/shk.0000000000002274] [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] [Indexed: 11/16/2023]
Abstract
ABSTRACT The analysis of the single-cell transcriptome has emerged as a powerful tool to gain insights on the basic mechanisms of health and disease. It is widely used to reveal the cellular diversity and complexity of tissues at cellular resolution by RNA sequencing of the whole transcriptome from a single cell. Equally, it is applied to discover an unknown, rare population of cells in the tissue. The prime advantage of single-cell transcriptome analysis is the detection of stochastic nature of gene expression of the cell in tissue. Moreover, the availability of multiple platforms for the single-cell transcriptome has broadened its approaches to using cells of different sizes and shapes, including the capture of short or full-length transcripts, which is helpful in the analysis of challenging biological samples. And with the development of numerous packages in R and Python, new directions in the computational analysis of single-cell transcriptomes can be taken to characterize healthy versus diseased tissues to obtain novel pathological insights. Downstream analysis such as differential gene expression analysis, gene ontology term analysis, Kyoto Encyclopedia of Genes and Genomes pathway analysis, cell-cell interaction analysis, and trajectory analysis has become standard practice in the workflow of single-cell transcriptome analysis to further examine the biology of different cell types. Here, we provide a broad overview of single-cell transcriptome analysis in health and disease conditions currently applied in various studies.
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Abstract
Wound healing occurs as a response to disruption of the epidermis and dermis. It is an intricate and well-orchestrated response with the goal to restore skin integrity and function. However, in hundreds of millions of patients, skin wound healing results in abnormal scarring, including keloid lesions or hypertrophic scarring. Although the underlying mechanisms of hypertrophic scars and keloid lesions are not well defined, evidence suggests that the changes in the extracellular matrix are perpetuated by ongoing inflammation in susceptible individuals, resulting in a fibrotic phenotype. The lesions then become established, with ongoing deposition of excess disordered collagen. Not only can abnormal scarring be debilitating and painful, it can also cause functional impairment and profound changes in appearance, thereby substantially affecting patients' lives. Despite the vast demand on patient health and the medical society, very little progress has been made in the care of patients with abnormal scarring. To improve the outcome of pathological scarring, standardized and innovative approaches are required.
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Affiliation(s)
- Marc G Jeschke
- Hamilton Health Sciences, McMaster University, Hamilton, Ontario, Canada.
| | - Fiona M Wood
- Burns Service of Western Australia, Fiona Stanley Hospital, Perth Children's Hospital, Perth, Western Australia, Australia
- Burn Injury Research Unit, University of Western Australia, Perth, Western Australia, Australia
| | - Esther Middelkoop
- Burn Center, Red Cross Hospital, Beverwijk, Netherlands
- Association of Dutch Burn Centers (ADBC), Beverwijk, Netherlands
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
- Amsterdam Movement Sciences (AMS) Institute, Amsterdam UMC, Amsterdam, Netherlands
| | - Ardeshir Bayat
- Medical Research Council Wound Healing Unit, Hair and Skin Research Lab, Division of Dermatology, Department of Medicine, University of Cape Town & Groote Schuur Hospital, Cape Town, South Africa
| | - Luc Teot
- Department of Plastic Surgery, Burns, Wound Healing, Montpellier University Hospital, Montpellier, France
| | - Rei Ogawa
- Department of Plastic, Reconstructive and Aesthetic Surgery, Nippon Medical School, Tokyo, Japan
| | - Gerd G Gauglitz
- Department of Dermatology and Allergy, Ludwig-Maximilian University Munich, Munich, Germany
- Haut- und Laserzentrum Glockenbach, Munich, Germany
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Rehou S, de Brito Monteiro L, Auger C, Knuth CM, Abdullahi A, Stanojcic M, Jeschke MG. Propranolol Normalizes Metabolomic Signatures Thereby Improving Outcomes After Burn. Ann Surg 2023; 278:519-529. [PMID: 37389480 DOI: 10.1097/sla.0000000000005973] [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] [Indexed: 07/01/2023]
Abstract
OBJECTIVE AND BACKGROUND Propranolol, a nonselective beta-receptor blocker, improves outcomes of severely burned patients. While the clinical and physiological benefits of beta-blockade are well characterized, the underlying metabolic mechanisms are less well defined. We hypothesized that propranolol improves outcomes after burn injury by profoundly modulating metabolic pathways. METHODS In this phase II randomized controlled trial, patients with burns ≥20% of total body surface area were randomly assigned to control or propranolol (dose given to decrease heart rate <100 bpm). Outcomes included clinical markers, inflammatory and lipidomic profiles, untargeted metabolomics, and molecular pathways. RESULTS Fifty-two severely burned patients were enrolled in this trial (propranolol, n=23 and controls, n=29). There were no significant differences in demographics or injury severity between groups. Metabolomic pathway analyses of the adipose tissue showed that propranolol substantially alters several essential metabolic pathways involved in energy and nucleotide metabolism, as well as catecholamine degradation ( P <0.05). Lipidomic analysis revealed that propranolol-treated patients had lower levels of proinflammatory palmitic acid ( P <0.05) and saturated fatty acids ( P <0.05) with an increased ratio of polyunsaturated fatty acids ( P <0.05), thus shifting the lipidomic profile towards an anti-inflammatory phenotype after burn ( P <0.05). These metabolic effects were mediated by decreased activation of hormone-sensitive lipase at serine 660 ( P <0.05) and significantly reduced endoplasmic reticulum stress by decreasing phospho-JNK ( P <0.05). CONCLUSION Propranolol's ability to mitigate pathophysiological changes to essential metabolic pathways results in significantly improved stress responses.
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Affiliation(s)
- Sarah Rehou
- Hamilton Health Sciences, Hamilton, ON, Canada
- School of Medicine, St. George's University, True Blue, Grenada
| | | | - Christopher Auger
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA
| | - Carly M Knuth
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA
- Sunnybrook Research Institute, Toronto, ON, Canada
| | - Abdikarim Abdullahi
- Sunnybrook Research Institute, Toronto, ON, Canada
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Mile Stanojcic
- Sunnybrook Research Institute, Toronto, ON, Canada
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Marc G Jeschke
- Hamilton Health Sciences, Hamilton, ON, Canada
- Department of Surgery, McMaster University, Hamilton, ON, Canada
- Sunnybrook Research Institute, Toronto, ON, Canada
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
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