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Shi Z, Xiong S, Hu R, Wang Z, Park J, Qian Y, Wang J, Bhalla P, Velupally N, Song Q, Song Z, Jeon MS, Zhang KK, Xie L, Layden BT, Ong SG, Jiang Y. The Notch-PDGFRβ axis suppresses brown adipocyte progenitor differentiation in early post-natal mice. Dev Cell 2024; 59:1233-1251.e5. [PMID: 38569546 DOI: 10.1016/j.devcel.2024.03.012] [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: 05/23/2023] [Revised: 12/08/2023] [Accepted: 03/08/2024] [Indexed: 04/05/2024]
Abstract
De novo brown adipogenesis holds potential in combating the epidemics of obesity and diabetes. However, the identity of brown adipocyte progenitor cells (APCs) and their regulation have not been extensively explored. Here, through in vivo lineage tracing and mouse modeling, we observed that platelet-derived growth factor receptor beta (PDGFRβ)+ pericytes give rise to developmental brown adipocytes but not to those in adult homeostasis. By contrast, T-box 18 (TBX18)+ pericytes contribute to brown adipogenesis throughout both developmental and adult stages, though in a depot-specific manner. Mechanistically, Notch inhibition in PDGFRβ+ pericytes promotes brown adipogenesis by downregulating PDGFRβ. Furthermore, inhibition of Notch signaling in PDGFRβ+ pericytes mitigates high-fat, high-sucrose (HFHS)-induced glucose and metabolic impairment in mice during their development and juvenile phases. Collectively, these findings show that the Notch/PDGFRβ axis negatively regulates developmental brown adipogenesis, and its repression promotes brown adipose tissue expansion and improves metabolic health.
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Affiliation(s)
- Zuoxiao Shi
- Department of Physiology and Biophysics, College of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA; Department of Pharmaceutical Sciences, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Shaolei Xiong
- Department of Microbiology and Immunology, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Ruoci Hu
- Department of Physiology and Biophysics, College of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA; Department of Pharmaceutical Sciences, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Zilai Wang
- Department of Microbiology and Immunology, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Jooman Park
- Department of Physiology and Biophysics, College of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Yanyu Qian
- Department of Physiology and Biophysics, College of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Jaden Wang
- Department of Physiology and Biophysics, College of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Pratibha Bhalla
- Department of Physiology and Biophysics, College of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Nipun Velupally
- Department of Physiology and Biophysics, College of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Qing Song
- Department of Kinesiology and Nutrition, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Zhenyuan Song
- Department of Kinesiology and Nutrition, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Minsun Stacey Jeon
- Texas A&M Health Science Center, Institute of Biosciences and Technology, Houston, TX 77030, USA
| | - Ke Kurt Zhang
- Texas A&M Health Science Center, Institute of Biosciences and Technology, Houston, TX 77030, USA
| | - Linlin Xie
- Department of Nutrition, Texas A&M University, College Station, TX 77845, USA
| | - Brian T Layden
- Division of Endocrinology, Department of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA; Jesse Brown Medical VA Medical Center, Chicago, IL 60612, USA
| | - Sang-Ging Ong
- Department of Pharmacology and Regenerative Medicine, College of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA; Division of Cardiology, Department of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Yuwei Jiang
- Department of Physiology and Biophysics, College of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA; Department of Pharmaceutical Sciences, University of Illinois Chicago, Chicago, IL 60612, USA; Division of Endocrinology, Department of Medicine, University of Illinois Chicago, Chicago, IL 60612, USA.
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Bustraan S, Bennett J, Whilding C, Pennycook BR, Smith D, Barr AR, Read J, Carling D, Pollard A. AMP-activated protein kinase activation suppresses leptin expression independently of adipogenesis in primary murine adipocytes. Biochem J 2024; 481:345-362. [PMID: 38314646 PMCID: PMC11088909 DOI: 10.1042/bcj20240003] [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: 01/06/2024] [Revised: 02/01/2024] [Accepted: 02/04/2024] [Indexed: 02/06/2024]
Abstract
Adipogenesis, defined as the development of mature adipocytes from stem cell precursors, is vital for the expansion, turnover and health of adipose tissue. Loss of adipogenic potential in adipose stem cells, or impairment of adipogenesis is now recognised as an underlying cause of adipose tissue dysfunction and is associated with metabolic disease. In this study, we sought to determine the role of AMP-activated protein kinase (AMPK), an evolutionarily conserved master regulator of energy homeostasis, in adipogenesis. Primary murine adipose-derived stem cells were treated with a small molecule AMPK activator (BI-9774) during key phases of adipogenesis, to determine the effect of AMPK activation on adipocyte commitment, maturation and function. To determine the contribution of the repression of lipogenesis by AMPK in these processes, we compared the effect of pharmacological inhibition of acetyl-CoA carboxylase (ACC). We show that AMPK activation inhibits adipogenesis in a time- and concentration-dependent manner. Transient AMPK activation during adipogenic commitment leads to a significant, ACC-independent, repression of adipogenic transcription factor expression. Furthermore, we identify a striking, previously unexplored inhibition of leptin gene expression in response to both short-term and chronic AMPK activation irrespective of adipogenesis. These findings reveal that in addition to its effect on adipogenesis, AMPK activation switches off leptin gene expression in primary mouse adipocytes independently of adipogenesis. Our results identify leptin expression as a novel target of AMPK through mechanisms yet to be identified.
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Affiliation(s)
- Sophia Bustraan
- Institute of Clinical Sciences, Faculty of Medicine, Imperial College London, London, U.K
- Medical Research Council Laboratory of Medical Sciences, London, U.K
| | - Jane Bennett
- Medical Research Council Laboratory of Medical Sciences, London, U.K
| | - Chad Whilding
- Medical Research Council Laboratory of Medical Sciences, London, U.K
| | | | - David Smith
- Emerging Innovations Unit, Discovery Sciences, R&D, AstraZeneca, Cambridge, U.K
| | - Alexis R. Barr
- Institute of Clinical Sciences, Faculty of Medicine, Imperial College London, London, U.K
- Medical Research Council Laboratory of Medical Sciences, London, U.K
| | - Jon Read
- Mechanistic and Structural Biology, Biopharmaceuticals R&D, AstraZeneca, Cambridge, U.K
| | - David Carling
- Institute of Clinical Sciences, Faculty of Medicine, Imperial College London, London, U.K
- Medical Research Council Laboratory of Medical Sciences, London, U.K
| | - Alice Pollard
- Institute of Clinical Sciences, Faculty of Medicine, Imperial College London, London, U.K
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Nevzorova YA, Cubero FJ. Obesity under the moonlight of c-MYC. Front Cell Dev Biol 2023; 11:1293218. [PMID: 38116204 PMCID: PMC10728299 DOI: 10.3389/fcell.2023.1293218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 11/07/2023] [Indexed: 12/21/2023] Open
Abstract
The moonlighting protein c-Myc is a master regulator of multiple biological processes including cell proliferation, differentiation, angiogenesis, apoptosis and metabolism. It is constitutively and aberrantly expressed in more than 70% of human cancers. Overwhelming evidence suggests that c-Myc dysregulation is involved in several inflammatory, autoimmune, metabolic and other non-cancerous diseases. In this review, we addressed the role of c-Myc in obesity. Obesity is a systemic disease, accompanied by multi-organ dysfunction apart from white adipose tissue (WAT), such as the liver, the pancreas, and the intestine. c-Myc plays a big diversity of functions regulating cellular proliferation, the maturation of progenitor cells, fatty acids (FAs) metabolism, and extracellular matrix (ECM) remodeling. Moreover, c-Myc drives the expression of a wide range of metabolic genes, modulates the inflammatory response, induces insulin resistance (IR), and contributes to the regulation of intestinal dysbiosis. Altogether, c-Myc is an interesting diagnostic tool and/or therapeutic target in order to mitigate obesity and its consequences.
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Affiliation(s)
- Yulia A. Nevzorova
- Department of Immunology, Ophthalmology and ENT, Complutense University School of Medicine, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, Spain
| | - Francisco Javier Cubero
- Department of Immunology, Ophthalmology and ENT, Complutense University School of Medicine, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, Spain
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Han X, Li W, He X, Lu X, Zhang Y, Li Y, Bi G, Ma X, Huang X, Bai R, Zhang H. Blockade of TGF-β signalling alleviates human adipose stem cell senescence induced by native ECM in obesity visceral white adipose tissue. Stem Cell Res Ther 2023; 14:291. [PMID: 37807066 PMCID: PMC10561428 DOI: 10.1186/s13287-023-03525-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] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 09/27/2023] [Indexed: 10/10/2023] Open
Abstract
BACKGROUND Abdominal obesity is appreciated as a major player in insulin resistance and metabolically dysfunctional adipose tissue. Inappropriate extracellular matrix (ECM) remodelling and functional alterations in human adipose stromal/stem cells (hASCs) have been linked with visceral white adipose tissue (vWAT) dysfunction in obesity. Understanding the interactions between hASCs and the native ECM environment in obese vWAT is required for the development of future therapeutic approaches for obesity-associated metabolic complications. METHODS The phenotypes and transcriptome properties of hASCs from the vWAT of obese patients and lean donors were assessed. The hASC-derived matrix from vWAT of obese or lean patients was generated in vitro using a decellularized method. The topography and the major components of the hASC-derived matrix were determined. The effects of the obese hASC-derived matrix on cell senescence and mitochondrial function were further determined. RESULTS We showed that hASCs derived from the vWAT of obese patients exhibited senescence and were accompanied by the increased production of ECM. The matrix secreted by obese hASCs formed a fibrillar suprastructure with an abundance of fibronectin, type I collagen, and transforming growth factor beta 1 (TGF-β1), which resembles the native matrix microenvironment of hASCs in vWAT derived from obese patients. Furthermore, the obese hASC-derived matrix promoted lean hASC ageing and induced mitochondrial dysfunction compared to the lean hASC-derived matrix. Blockade of TGF-β1 signalling using an anti-TGF-β1 neutralizing antibody alleviated the lean hASC senescence and mitochondrial dysfunction induced by the obese hASC-derived matrix. CONCLUSIONS Native ECM in obesity vWAT initiates hASC senescence through TGF-β1-mediated mitochondrial dysfunction. These data provide a key mechanism for understanding the importance of cell-ECM interactions in hASCs senescence in obesity.
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Affiliation(s)
- Xueya Han
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Weihong Li
- Experimental Center for Basic Medical Teaching, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Xu He
- Experimental Center for Basic Medical Teaching, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Xin Lu
- Experimental Center for Basic Medical Teaching, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Yu Zhang
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Yaqiong Li
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Guoyun Bi
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Xuqing Ma
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China
| | - Xiaowu Huang
- Fu Xing Hospital, Capital Medical University, Beijing, 100038, China
| | - Rixing Bai
- Department of General Surgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, 100070, China
| | - Haiyan Zhang
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China.
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Zhao J, Sun Y, Sheng X, Xu J, Dai G, He R, Jin Y, Liu Z, Xie Y, Wu T, Cao Y, Hu J, Duan C. Hypoxia-treated adipose mesenchymal stem cell-derived exosomes attenuate lumbar facet joint osteoarthritis. Mol Med 2023; 29:120. [PMID: 37670256 PMCID: PMC10478461 DOI: 10.1186/s10020-023-00709-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 07/26/2023] [Indexed: 09/07/2023] Open
Abstract
BACKGROUND Lumbar facet joint osteoarthritis (LFJ OA) is a common disease, and there is still a lack of effective disease-modifying therapies. Our aim was to determine the therapeutic effect of hypoxia-treated adipose mesenchymal stem cell (ADSC)-derived exosomes (Hypo-ADSC-Exos) on the protective effect against LFJ OA. METHODS The protective effect of Hypo-ADSC-Exos against LFJ OA was examined in lumbar spinal instability (LSI)-induced LFJ OA models. Spinal pain behavioural assessments and CGRP (Calcitonin Gene-Related Peptide positive) immunofluorescence were evaluated. Cartilage degradation and subchondral bone remodelling were assessed by histological methods, immunohistochemistry, synchrotron radiation-Fourier transform infrared spectroscopy (SR-FTIR), and 3D X-ray microscope scanning. RESULTS Hypoxia enhanced the protective effect of ADSC-Exos on LFJ OA. Specifically, tail vein injection of Hypo-ADSC-Exos protected articular cartilage from degradation, as demonstrated by lower FJ OA scores of articular cartilage and less proteoglycan loss in lumbar facet joint (LFJ) cartilage than in the ADSC-Exo group, and these parameters were significantly improved compared to those in the PBS group. In addition, the levels and distribution of collagen and proteoglycan in LFJ cartilage were increased in the Hypo-ADSC-Exo group compared to the ADSC-Exo or PBS group by SR-FTIR. Furthermore, Hypo-ADSC-Exos normalized uncoupled bone remodelling and aberrant H-type vessel formation in subchondral bone and effectively reduced symptomatic spinal pain caused by LFJ OA in mice compared with those in the ADSC-Exo or PBS group. CONCLUSIONS Our results show that hypoxia is an effective method to improve the therapeutic effect of ADSC-Exos on ameliorating spinal pain and LFJ OA progression.
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Affiliation(s)
- Jinyun Zhao
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China
- Hunan Engineering Research Center of Sports and Health, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Yi Sun
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China
- Hunan Engineering Research Center of Sports and Health, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Xiaolong Sheng
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China
- Hunan Engineering Research Center of Sports and Health, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Jiaqi Xu
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China
- Hunan Engineering Research Center of Sports and Health, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Guoyu Dai
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China
- Hunan Engineering Research Center of Sports and Health, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Rundong He
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China
- Hunan Engineering Research Center of Sports and Health, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Yuxin Jin
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China
- Hunan Engineering Research Center of Sports and Health, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Zhide Liu
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China
- Hunan Engineering Research Center of Sports and Health, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Yong Xie
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China
- Hunan Engineering Research Center of Sports and Health, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Tianding Wu
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China
- Hunan Engineering Research Center of Sports and Health, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Yong Cao
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China.
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China.
- Hunan Engineering Research Center of Sports and Health, Changsha, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China.
| | - Jianzhong Hu
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China.
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China.
- Hunan Engineering Research Center of Sports and Health, Changsha, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China.
| | - Chunyue Duan
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, China.
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha, 410008, China.
- Hunan Engineering Research Center of Sports and Health, Changsha, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China.
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Saad B. Management of Obesity-Related Inflammatory and Cardiovascular Diseases by Medicinal Plants: From Traditional Uses to Therapeutic Targets. Biomedicines 2023; 11:2204. [PMID: 37626701 PMCID: PMC10452657 DOI: 10.3390/biomedicines11082204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/09/2023] [Accepted: 07/25/2023] [Indexed: 08/27/2023] Open
Abstract
Inflammation is a crucial factor in the development and progression of cardiovascular diseases (CVD). Cardiac remodeling in the presence of persistent inflammation leads to myocardial fibrosis and extracellular matrix changes, which reduce cardiac function, induce arrhythmias, and finally, cause heart failure. The majority of current CVD treatment plans concentrate on reducing risk factors such as hyperlipidemia, type 2 diabetes, and hypertension. One such strategy could be inflammation reduction. Numerous in vitro, animal, and clinical studies indicate that obesity is associated with low-grade inflammation. Recent studies have demonstrated the potential of medicinal plants and phytochemicals to cure and prevent obesity and inflammation. In comparison to conventional therapies, the synergistic effects of several phytochemicals boost their bioavailability and impact numerous cellular and molecular targets. Focusing on appetite, pancreatic lipase activity, thermogenesis, lipid metabolism, lipolysis and adipogenesis, apoptosis in adipocytes, and adipocyte life cycle by medicinal plants and phytochemicals represent an important goal in the development of new anti-obesity drugs. We conducted an extensive review of the literature and electronic databases, including Google Scholar, PubMed, Science Direct, and MedlinePlus, for collecting data on the therapeutic effects of medicinal plants/phytochemicals in curing obesity and its related inflammation and CVD diseases, including cellular and molecular mechanisms, cytokines, signal transduction cascades, and clinical trials.
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Affiliation(s)
- Bashar Saad
- Al-Qasemi Academic College, Baqa Algharbiya 30100, Israel; or
- Department of Biochemistry, Faculty of Medicine, The Arab American University, Jenin P203, Palestine
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7
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Mattei V, Delle Monache S. 10th Anniversary of Biomedicines-Advances in Mesenchymal Stem Cells. Biomedicines 2023; 11:2183. [PMID: 37626680 PMCID: PMC10452608 DOI: 10.3390/biomedicines11082183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 07/25/2023] [Indexed: 08/27/2023] Open
Abstract
Mesenchymal stromal cells (MSCs) are non-specialized adult stem cells (ASCs), cells that reproduce to provide specific cytotypes [...].
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Affiliation(s)
- Vincenzo Mattei
- Biomedicine and Advanced Technologies Rieti Center, Sabina Universitas, 02100 Rieti, Italy
| | - Simona Delle Monache
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, 67100 L’Aquila, Italy
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8
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Yuan Y, Shi Z, Xiong S, Hu R, Song Q, Song Z, Ong SG, Jiang Y. Differential roles of insulin receptor in adipocyte progenitor cells in mice. Mol Cell Endocrinol 2023; 573:111968. [PMID: 37244600 PMCID: PMC10846871 DOI: 10.1016/j.mce.2023.111968] [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: 03/03/2023] [Revised: 05/17/2023] [Accepted: 05/18/2023] [Indexed: 05/29/2023]
Abstract
The development of white adipose tissue (WAT) occurs during distinct embryonic and postnatal stages, and it is subsequently maintained throughout life. However, the specific mediators and mechanisms responsible for WAT development during different phases remain unclear. In this study, we investigate the role of the insulin receptor (IR) in regulating adipogenesis and adipocyte function within adipocyte progenitor cells (APCs) during WAT development and homeostasis. We use two in vivo adipose lineage tracking and deletion systems to delete IR either in embryonic APCs or adult APCs, respectively, to explore the specific requirements of IR during WAT development and WAT homeostasis in mice. Our data suggest that IR expression in APCs may not be essential for adult adipocyte differentiation but appears to be crucial for adipose tissue development. We reveal a surprising divergent role of IR in APCs during WAT development and homeostasis.
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Affiliation(s)
- Yexian Yuan
- Guangdong Laboratory of Lingnan Modern Agriculture, Guangdong Province Key Laboratory of Animal Nutritional Regulation and National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China; Department of Physiology and Biophysics, The University of Illinois at Chicago, Chicago, IL, 60612, USA
| | - Zuoxiao Shi
- Department of Physiology and Biophysics, The University of Illinois at Chicago, Chicago, IL, 60612, USA; Department of Pharmaceutical Sciences, The University of Illinois at Chicago, Chicago, IL, 60612, USA
| | - Shaolei Xiong
- Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Ruoci Hu
- Department of Physiology and Biophysics, The University of Illinois at Chicago, Chicago, IL, 60612, USA; Department of Pharmaceutical Sciences, The University of Illinois at Chicago, Chicago, IL, 60612, USA
| | - Qing Song
- Department of Kinesiology and Nutrition, The University of Illinois at Chicago, Chicago, IL, 60612, USA
| | - Zhenyuan Song
- Department of Kinesiology and Nutrition, The University of Illinois at Chicago, Chicago, IL, 60612, USA
| | - Sang-Ging Ong
- Department of Pharmacology and Regenerative Medicine, College of Medicine, The University of Illinois at Chicago, Illinois, 60612, USA; Division of Cardiology, Department of Medicine, The University of Illinois College of Medicine, Illinois, 60612, USA
| | - Yuwei Jiang
- Department of Physiology and Biophysics, The University of Illinois at Chicago, Chicago, IL, 60612, USA; Department of Pharmaceutical Sciences, The University of Illinois at Chicago, Chicago, IL, 60612, USA; Division of Endocrinology, Department of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA.
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A cross-talk between sestrins, chronic inflammation and cellular senescence governs the development of age-associated sarcopenia and obesity. Ageing Res Rev 2023; 86:101852. [PMID: 36642190 DOI: 10.1016/j.arr.2023.101852] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 12/20/2022] [Accepted: 01/10/2023] [Indexed: 01/15/2023]
Abstract
The rapid increase in both the lifespan and proportion of older adults is accompanied by the unprecedented rise in age-associated chronic diseases, including sarcopenia and obesity. Aging is also manifested by increased susceptibility to multiple endogenous and exogenous stresses enabling such chronic conditions to develop. Among the main physiological regulators of cellular adaption to various stress stimuli, such as DNA damage, hypoxia, and oxidative stress, are sestrins (Sesns), a family of three evolutionarily conserved proteins, Sesn1, 2, and 3. Age-associated sarcopenia and obesity are characterized by two key processes: (i) accumulation of senescent cells in the skeletal muscle and adipose tissue and (ii) creation of a systemic, chronic, low-grade inflammation (SCLGI). Presumably, failed SCLGI resolution governs the development of these chronic conditions. Noteworthy, Sesns activate senolytics, which are agents that selectively eliminate senescent cells, as well as specialized pro-resolving mediators, which are factors that physiologically provide inflammation resolution. Sesns reveal clear beneficial effects in pre-clinical models of sarcopenia and obesity. Based on these observations, we propose a novel treatment strategy for age-associated sarcopenia and obesity, complementary to the conventional therapeutic modalities: Sesn activation, SCLGI resolution, and senescent cell elimination.
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10
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Boronat-Toscano A, Vañó I, Monfort-Ferré D, Menacho M, Valldosera G, Caro A, Espina B, Mañas MJ, Marti M, Espin E, Saera-Vila A, Serena C. Smoking Suppresses the Therapeutic Potential of Adipose Stem Cells in Crohn’s Disease Patients through Epigenetic Changes. Cells 2023; 12:cells12071021. [PMID: 37048094 PMCID: PMC10093550 DOI: 10.3390/cells12071021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/21/2023] [Accepted: 03/25/2023] [Indexed: 03/29/2023] Open
Abstract
Patients with Crohn’s disease (CD) who smoke are known to have a worse prognosis than never-smokers and a higher risk for post-surgical recurrence, whereas patients who quit smoking after surgery have significantly lower post-operative recurrence. The hypothesis was that smoking induces epigenetic changes that impair the capacity of adipose stem cells (ASCs) to suppress the immune system. It was also questioned whether this impairment remains in ex-smokers with CD. ASCs were isolated from non-smokers, smokers and ex-smokers with CD and their interactions with immune cells were studied. The ASCs from both smokers and ex-smokers promoted macrophage polarization to an M1 pro-inflammatory phenotype, were not able to inhibit T- and B-cell proliferation in vitro and enhanced the gene and protein expression of inflammatory markers including interleukin-1b. Genome-wide epigenetic analysis using two different bioinformatic approaches revealed significant changes in the methylation patterns of genes that are critical for wound healing, immune and metabolic response and p53-mediated DNA damage response in ASCs from smokers and ex-smokers with CD. In conclusion, cigarette smoking induces a pro-inflammatory epigenetic signature in ASCs that likely compromises their therapeutic potential.
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11
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Adipose-Derived Mesenchymal Stromal Cells in Basic Research and Clinical Applications. Int J Mol Sci 2023; 24:ijms24043888. [PMID: 36835295 PMCID: PMC9962639 DOI: 10.3390/ijms24043888] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/09/2023] [Accepted: 02/14/2023] [Indexed: 02/17/2023] Open
Abstract
Adipose-derived mesenchymal stromal cells (AD-MSCs) have been extensively studied in recent years. Their attractiveness is due to the ease of obtaining clinical material (fat tissue, lipoaspirate) and the relatively large number of AD-MSCs present in adipose tissue. In addition, AD-MSCs possess a high regenerative potential and immunomodulatory activities. Therefore, AD-MSCs have great potential in stem cell-based therapies in wound healing as well as in orthopedic, cardiovascular, or autoimmune diseases. There are many ongoing clinical trials on AD-MSC and in many cases their effectiveness has been proven. In this article, we present current knowledge about AD-MSCs based on our experience and other authors. We also demonstrate the application of AD-MSCs in selected pre-clinical models and clinical studies. Adipose-derived stromal cells can also be the pillar of the next generation of stem cells that will be chemically or genetically modified. Despite much research on these cells, there are still important and interesting areas to explore.
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12
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Fan F, Grant RA, Whitehead JP, Yewlett A, F Lee PY. An observational study evaluating the efficacy of microfragmented adipose tissue in the treatment of osteoarthritis. Regen Med 2023; 18:113-121. [PMID: 36541936 DOI: 10.2217/rme-2022-0110] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Aim: Osteoarthritis (OA) prevalence is increased in ageing and obese populations. This prospective single-arm cohort study aimed to investigate the efficacy of autologous microfragmented adipose tissue treatment of severe knee or shoulder OA. Materials & methods: Participants received an intra-articular microfragmented adipose tissue injection to the affected joint(s). Multiple patient reported outcome measures (PROMS) were recorded from 0 to 52 weeks for 63 consecutive joints. Results: Compared with baseline, there were significant improvements in all PROMS from 2 to 12 weeks and maintained at 52 weeks. Regression analysis revealed an inverse correlation with BMI and change in PROMS for knee joints. Conclusion: Our observed findings suggest this approach represents a safe, effective treatment for moderate-to-severe knee and shoulder OA, although efficacy may be reduced with increasing obesity.
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Affiliation(s)
- Frankie Fan
- Kettering General Hospital, Trauma & Orthopaedics, Rothwell Road, England, NN16 8UZ
| | - Robert A Grant
- Kettering General Hospital, Trauma & Orthopaedics, Rothwell Road, England, NN16 8UZ
| | - Jonathan P Whitehead
- University of Lincoln, School of Life & Environmental Sciences, Brayford Pool, Lincoln, England, LN6 7TS
| | - Alun Yewlett
- MSK Doctors, MSK House, London Road, Willoughby, Sleaford, England, NG34 8NY, UK
| | - Paul Y F Lee
- University of Lincoln, School of Sport & Exercise Science, Brayford Pool, Lincoln, England, LN6 7TS.,MSK Doctors, MSK House, London Road, Willoughby, Sleaford, England, NG34 8NY, UK
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13
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Yan M, Jin S, Wang Z, Xia T, Liu Y, Chang Q. Limonin counteracts obesity by activating thermogenesis in brown and white adipose tissues. J Funct Foods 2023; 100:105393. [DOI: 10.1016/j.jff.2022.105393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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14
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Zhang YX, Ou MY, Yang ZH, Sun Y, Li QF, Zhou SB. Adipose tissue aging is regulated by an altered immune system. Front Immunol 2023; 14:1125395. [PMID: 36875140 PMCID: PMC9981968 DOI: 10.3389/fimmu.2023.1125395] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 01/30/2023] [Indexed: 02/19/2023] Open
Abstract
Adipose tissue is a widely distributed organ that plays a critical role in age-related physiological dysfunctions as an important source of chronic sterile low-grade inflammation. Adipose tissue undergoes diverse changes during aging, including fat depot redistribution, brown and beige fat decrease, functional decline of adipose progenitor and stem cells, senescent cell accumulation, and immune cell dysregulation. Specifically, inflammaging is common in aged adipose tissue. Adipose tissue inflammaging reduces adipose plasticity and pathologically contributes to adipocyte hypertrophy, fibrosis, and ultimately, adipose tissue dysfunction. Adipose tissue inflammaging also contributes to age-related diseases, such as diabetes, cardiovascular disease and cancer. There is an increased infiltration of immune cells into adipose tissue, and these infiltrating immune cells secrete proinflammatory cytokines and chemokines. Several important molecular and signaling pathways mediate the process, including JAK/STAT, NFκB and JNK, etc. The roles of immune cells in aging adipose tissue are complex, and the underlying mechanisms remain largely unclear. In this review, we summarize the consequences and causes of inflammaging in adipose tissue. We further outline the cellular/molecular mechanisms of adipose tissue inflammaging and propose potential therapeutic targets to alleviate age-related problems.
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Affiliation(s)
- Yi-Xiang Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Min-Yi Ou
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zi-Han Yang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu Sun
- Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Qing-Feng Li
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuang-Bai Zhou
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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15
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Prevention and Treatment of Obesity-Related Inflammatory Diseases by Edible and Medicinal Plants and Their Active Compounds. IMMUNO 2022. [DOI: 10.3390/immuno2040038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Obesity, defined by excessive fat mass and its associated low-grade chronic inflammation, leads to insulin resistance, diabetes, and metabolic dysfunctions. The immunomodulatory properties of natural agents have gained much interest in recent decades. Some of the plant-derived agents are known to be immunomodulators that can affect both innate and adaptive immunity, e.g., thymoquinone, curcumin, punicalagin, resveratrol, quercetin, and genistein. Natural immunomodulators may contribute to the treatment of a number of inflammatory diseases, as they have significant efficacy and safety profiles. The immunomodulatory effects of traditional Greco-Arab and Islamic diets and medicinal plants are well acknowledged in abundant in vitro studies as well as in animal studies and clinical trials. This review highlights the role of Greco-Arab and Islamic diets and medicinal plants in the management of inflammation associated with obesity. Although previously published review articles address the effects of medicinal plants and phytochemicals on obesity-related inflammation, there is no systematic review that emphasizes clinical trials of the clinical significance of these plants and phytochemicals. Given this limitation, the objective of this comprehensive review is to critically evaluate the potential of the most used herbs in the management of obesity-related inflammation based on clinical trials.
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16
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Yasmeen R, Pham Q, Fukagawa NK, Wang TTY. Individual Variabilities in Adipose Stem Cell Proliferation, Gene Expression and Responses to Lipopolysaccharide Stimulation. Int J Mol Sci 2022; 23:12534. [PMID: 36293398 PMCID: PMC9604277 DOI: 10.3390/ijms232012534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/30/2022] [Accepted: 10/11/2022] [Indexed: 11/15/2023] Open
Abstract
Adipose stem cells (ASCs) are reported to play a role in normal physiology as well as in inflammation and disease. The objective of this work was to elucidate inter-individual differences in growth, gene expression and response to inflammatory stimuli in ASCs from different donors. Human ASC1 (male donor) and ASC2 (female donor) were purchased from Lonza (Walkersville, MD). Cell proliferation was determined by the sulforhodamine B assay. After time-dependent treatment of ASCs with or without bacterial lipopolysaccharide (LPS), marker gene mRNAs for proliferation, steroid hormones, and xenobiotic and immune pathways were determined using RT-PCR, and secreted cytokine levels in media were measured using the Bio-Plex cytokine assay kit. ASCs from both donors expressed androgen receptors but not estrogen receptors. ASC2 had a 2-fold higher proliferation rate and a 6-fold higher level of proliferation marker Ki67 mRNA than ASC1. ASC2 exhibited significantly greater fold induction of TNF-α and CCL2 by LPS compared to ASC1. TNF-α and GM-CSF protein levels were also significantly higher in the LPS-induced ASC2 media, but IL-6 secretion was higher in the LPS-induced ASC1 media. Our findings suggest that inter-individual variability and/or possible sex differences exist in ASCs, which may serve as a key determinant to inflammatory responses of ASCs.
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Affiliation(s)
- Rumana Yasmeen
- Diet, Genomics and Immunology Laboratory, Beltsville Human Nutrition Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705, USA
- Division of Food Labeling & Standards, Office of Nutrition and Food Labeling, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, MD 20740, USA
| | - Quynhchi Pham
- Diet, Genomics and Immunology Laboratory, Beltsville Human Nutrition Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705, USA
| | - Naomi K. Fukagawa
- Diet, Genomics and Immunology Laboratory, Beltsville Human Nutrition Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705, USA
| | - Thomas T. Y. Wang
- Diet, Genomics and Immunology Laboratory, Beltsville Human Nutrition Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705, USA
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17
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Ceccarelli S, Gerini G, Megiorni F, Pontecorvi P, Messina E, Camero S, Anastasiadou E, Romano E, Onesti MG, Napoli C, Marchese C. Inhibiting DNA methylation as a strategy to enhance adipose-derived stem cells differentiation: Focus on the role of Akt/mTOR and Wnt/β-catenin pathways on adipogenesis. Front Cell Dev Biol 2022; 10:926180. [PMID: 36120582 PMCID: PMC9478209 DOI: 10.3389/fcell.2022.926180] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 07/28/2022] [Indexed: 01/10/2023] Open
Abstract
Adipose-derived mesenchymal stem cells (ASCs) represent a valid therapeutic option for clinical application in several diseases, due to their ability to repair damaged tissues and to mitigate the inflammatory/immune response. A better understanding of the underlying mechanisms regulating ASC biology might represent the chance to modulate their in vitro characteristics and differentiation potential for regenerative medicine purposes. Herein, we investigated the effects of the demethylating agent 5-azacytidine (5-aza) on proliferation, clonogenicity, migration, adipogenic differentiation and senescence of ASCs, to identify the molecular pathways involved. Through functional assays, we observed a detrimental effect of 5-aza on ASC self-renewal capacity and migration, accompanied by actin cytoskeleton reorganization, with decreased stress fibers. Conversely, 5-aza treatment enhanced ASC adipogenic differentiation, as assessed by lipid accumulation and expression of lineage-specific markers. We analyzed the involvement of the Akt/mTOR, MAPK and Wnt/β-catenin pathways in these processes. Our results indicated impairment of Akt and ERK phosphorylation, potentially explaining the reduced cell proliferation and migration. We observed a 5-aza-mediated inhibition of the Wnt signaling pathway, this potentially explaining the pro-adipogenic effect of the drug. Finally, 5-aza treatment significantly induced ASC senescence, through upregulation of the p53/p21 axis. Our data may have important translational implications, by helping in clarifying the potential risks and advantages of using epigenetic treatment to improve ASC characteristics for cell-based clinical approaches.
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Affiliation(s)
- S. Ceccarelli
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
- *Correspondence: S. Ceccarelli ,
| | - G. Gerini
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - F. Megiorni
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - P. Pontecorvi
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - E. Messina
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - S. Camero
- Department of Maternal, Infantile and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - E. Anastasiadou
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - E. Romano
- Department of Sense Organs, Sapienza University of Rome, Rome, Italy
| | - M. G. Onesti
- Department of Surgery “P. Valdoni”, Unit of Plastic Surgery “P. Valdoni”, Sapienza University of Rome, Rome, Italy
| | - C. Napoli
- Department of Advanced Medical and Surgical Sciences (DAMSS), University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - C. Marchese
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
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18
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Mularczyk M, Bourebaba N, Marycz K, Bourebaba L. Astaxanthin Carotenoid Modulates Oxidative Stress in Adipose-Derived Stromal Cells Isolated from Equine Metabolic Syndrome Affected Horses by Targeting Mitochondrial Biogenesis. Biomolecules 2022; 12:biom12081039. [PMID: 36008933 PMCID: PMC9405637 DOI: 10.3390/biom12081039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/15/2022] [Accepted: 07/22/2022] [Indexed: 02/06/2023] Open
Abstract
Astaxanthin is gaining recognition as a natural bioactive component. This study aimed to test whether astaxanthin could protect adipose-derived stromal stem cells (ASCs) from apoptosis, mitochondrial dysfunction and oxidative stress. Phaffia rhodozyma was used to extract astaxanthin, whose biocompatibility was tested after 24, 48 and 72 h of incubation with the cells; no harmful impact was found. ASCs were treated with optimal concentrations of astaxanthin. Several parameters were examined: cell viability, apoptosis, reactive oxygen levels, mitochondrial dynamics and metabolism, superoxide dismutase activity, and astaxanthin’s antioxidant capacity. A RT PCR analysis was performed after each test. The astaxanthin treatment significantly reduced apoptosis by modifying the normalized caspase activity of pro-apoptotic pathways (p21, p53, and Bax). Furthermore, by regulating the expression of related master factors SOD1, SOD2, PARKIN, PINK 1, and MFN 1, astaxanthin alleviated the oxidative stress and mitochondrial dynamics failure caused by EMS. Astaxanthin restored mitochondrial oxidative phosphorylation by stimulating markers associated with the OXPHOS machinery: COX4I1, COX4I2, UQCRC2, NDUFA9, and TFAM. Our results suggest that astaxanthin has the potential to open new possibilities for potential bio-drugs to control and suppress oxidative stress, thereby improving the overall metabolic status of equine ASCs suffering from metabolic syndrome.
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Affiliation(s)
- Malwina Mularczyk
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375 Wrocław, Poland; (N.B.); (K.M.)
- International Institute of Translational Medicine, Jesionowa 11, Malin, 55-114 Wisznia Mała, Poland
- Correspondence: (M.M.); (L.B.); Tel.: +48-71-320-5248 (L.B.)
| | - Nabila Bourebaba
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375 Wrocław, Poland; (N.B.); (K.M.)
| | - Krzysztof Marycz
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375 Wrocław, Poland; (N.B.); (K.M.)
- International Institute of Translational Medicine, Jesionowa 11, Malin, 55-114 Wisznia Mała, Poland
| | - Lynda Bourebaba
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375 Wrocław, Poland; (N.B.); (K.M.)
- Correspondence: (M.M.); (L.B.); Tel.: +48-71-320-5248 (L.B.)
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19
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Shin S. Regulation of Adipose Tissue Biology by Long-Chain Fatty Acids: Metabolic Effects and Molecular Mechanisms. J Obes Metab Syndr 2022; 31:147-160. [PMID: 35691686 PMCID: PMC9284576 DOI: 10.7570/jomes22014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 04/13/2022] [Accepted: 04/27/2022] [Indexed: 11/20/2022] Open
Abstract
Long-chain fatty acids (LCFA) modulate metabolic, oxidative, and inflammatory responses, and the physiological effects of LCFA are determined by chain length and the degree of saturation. Adipose tissues comprise multiple cell types, and play a significant role in energy storage and expenditure. Fatty acid uptake and oxidation are the pathways through which fatty acids participate in the regulation of energy homeostasis, and their dysregulation can lead to the development of obesity and chronic obesity-related disorders, including type 2 diabetes, cardiovascular diseases, and certain types of cancer. Numerous studies have reported that many aspects of adipose tissue biology are influenced by the number and position of double bonds in LCFA, and these effects are mediated by various signaling pathways, including those regulating adipocyte differentiation (adipogenesis), thermogenesis, and inflammation in adipose tissue. This review aims to describe the underlying molecular mechanisms by which different types of LCFA influence adipose tissue metabolism, and to further clarify their relevance to metabolic dysregulation associated with obesity. A better understanding of the effects of LCFA on adipose tissue metabolism may lead to improved nutraceutical strategies to address obesity and obesity-associated diseases.
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Affiliation(s)
- Sunhye Shin
- Major of Food and Nutrition, Division of Applied Food System, Seoul Women's University, Seoul, Korea
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20
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Trappc9 Deficiency Impairs the Plasticity of Stem Cells. Int J Mol Sci 2022; 23:ijms23094900. [PMID: 35563289 PMCID: PMC9101649 DOI: 10.3390/ijms23094900] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 04/24/2022] [Accepted: 04/25/2022] [Indexed: 02/04/2023] Open
Abstract
Genetic mutations of trappc9 cause intellectual disability with the atrophy of brain structures and variable obesity by poorly understood mechanisms. Trappc9-deficient mice develop phenotypes resembling pathological changes in humans and appear overweight shortly after weaning, and thus are useful for studying the pathogenesis of obesity. Here, we investigated the effects of trappc9 deficiency on the proliferation and differentiation capacity of adipose-derived stem cells (ASCs). We isolated ASCs from mice before overweight was developed and found that trappc9-null ASCs exhibited signs of premature senescence and cell death. While the lineage commitment was retained, trappc9-null ASCs preferred adipogenic differentiation. We observed a profound accumulation of lipid droplets in adipogenic cells derived from trappc9-deficient ASCs and marked differences in the distribution patterns and levels of calcium deposited in osteoblasts obtained from trappc9-null ASCs. Biochemical studies revealed that trappc9 deficiency resulted in an upregulated expression of rab1, rab11, and rab18, and agitated autophagy in ASCs. Moreover, we found that the content of neural stem cells in both the subventricular zone of the lateral ventricle and the subgranular zone of the dentate gyrus vastly declined in trappc9-null mice. Collectively, our results suggest that obesity, as well as brain structure hypoplasia induced by the deficiency of trappc9, involves an impairment in the plasticity of stem cells.
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21
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Zhang Q, Zhang C, Wang H, Ma Z, Liu D, Guan X, Liu Y, Fu Y, Cui M, Dong J. Intermittent Fasting versus Continuous Calorie Restriction: Which Is Better for Weight Loss? Nutrients 2022; 14:nu14091781. [PMID: 35565749 PMCID: PMC9099935 DOI: 10.3390/nu14091781] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 02/05/2023] Open
Abstract
We conducted a systematic review and meta-analysis of randomized clinical trials and pilot trial studies to compare the effectiveness of intermittent fasting (IF) and continuous calorie restriction (CCR) in overweight and obese people. The parameters included body mass index (BMI), body weight, and other metabolism-related indicators. A systematic search in PubMed, Embase, Cochrane Library, and Web of Science was conducted up to January 2022. Standardized mean differences (SMDs) with 95% confidence intervals (CIs) were used to measure the effectiveness. Publication bias was assessed using Egger’s test. The stability of the results was evaluated using sensitivity analyses. The significance of body weight change (SMD = −0.21, 95% CI (−0.40, −0.02) p = 0.028) was more significant after IF than CCR. There was no significant difference in BMI (SMD = 0.02, 95% CI (−0.16, 0.20) p = 0.848) between IF and CCR. These findings suggest that IF may be superior to CCR for weight loss in some respects.
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Affiliation(s)
- Qing Zhang
- Special Medicine Department, Medical College, Qingdao University, Qingdao 266071, China; (Q.Z.); (C.Z.); (H.W.)
| | - Caishun Zhang
- Special Medicine Department, Medical College, Qingdao University, Qingdao 266071, China; (Q.Z.); (C.Z.); (H.W.)
| | - Haidan Wang
- Special Medicine Department, Medical College, Qingdao University, Qingdao 266071, China; (Q.Z.); (C.Z.); (H.W.)
| | - Zhengye Ma
- Clinical Medicine Department, Medical College, Qingdao University, Qingdao 266071, China; (Z.M.); (D.L.); (X.G.); (Y.L.); (Y.F.); (M.C.)
| | - Defeng Liu
- Clinical Medicine Department, Medical College, Qingdao University, Qingdao 266071, China; (Z.M.); (D.L.); (X.G.); (Y.L.); (Y.F.); (M.C.)
| | - Xiaohan Guan
- Clinical Medicine Department, Medical College, Qingdao University, Qingdao 266071, China; (Z.M.); (D.L.); (X.G.); (Y.L.); (Y.F.); (M.C.)
| | - Yixin Liu
- Clinical Medicine Department, Medical College, Qingdao University, Qingdao 266071, China; (Z.M.); (D.L.); (X.G.); (Y.L.); (Y.F.); (M.C.)
| | - Yanwen Fu
- Clinical Medicine Department, Medical College, Qingdao University, Qingdao 266071, China; (Z.M.); (D.L.); (X.G.); (Y.L.); (Y.F.); (M.C.)
| | - Mingxuan Cui
- Clinical Medicine Department, Medical College, Qingdao University, Qingdao 266071, China; (Z.M.); (D.L.); (X.G.); (Y.L.); (Y.F.); (M.C.)
| | - Jing Dong
- Special Medicine Department, Medical College, Qingdao University, Qingdao 266071, China; (Q.Z.); (C.Z.); (H.W.)
- Physiology Department, Medical College, Qingdao University, Qingdao 266071, China
- Correspondence:
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22
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The Role of Intermittent Energy Restriction Diet on Metabolic Profile and Weight Loss among Obese Adults. Nutrients 2022; 14:nu14071509. [PMID: 35406122 PMCID: PMC9002823 DOI: 10.3390/nu14071509] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/02/2022] [Accepted: 04/03/2022] [Indexed: 02/01/2023] Open
Abstract
Obesity is a disease defined by an elevated body mass index (BMI), which is the result of excessive or abnormal accumulation of fat. Dietary intervention is fundamental and essential as the first-line treatment for obese patients, and the main rule of every dietary modification is calorie restriction and consequent weight loss. Intermittent energy restriction (IER) is a special type of diet consisting of intermittent pauses in eating. There are many variations of IER diets such as alternate-day fasting (ADF) and time-restricted feeding (TRF). In the literature, the IER diet is known as an effective method for bodyweight reduction. Furthermore, IER diets have a beneficial effect on systolic or diastolic pressure, lipid profile, and glucose homeostasis. In addition, IER diets are presented as being as efficient as a continuous energy restriction diet (CER) in losing weight and improving metabolic parameters. Thus, the IER diet could present an alternative option for those who cannot accept a constant food regimen.
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23
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Preventing White Adipocyte Browning during Differentiation In Vitro: The Effect of Differentiation Protocols on Metabolic and Mitochondrial Phenotypes. Stem Cells Int 2022; 2022:3308194. [PMID: 35422865 PMCID: PMC9005291 DOI: 10.1155/2022/3308194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 03/01/2022] [Indexed: 11/29/2022] Open
Abstract
Mitochondrial dysfunction in white adipose tissue is strongly associated with obesity and its metabolic complications, which are important health challenges worldwide. Human adipose-derived stromal/stem cells (hASCs) are a promising tool to investigate the underlying mechanisms of such mitochondrial dysfunction and to subsequently provide knowledge for the development of treatments for obesity-related pathologies. A substantial obstacle in using hASCs is that the key compounds for adipogenic differentiation in vitro increase mitochondrial uncoupling, biogenesis, and activity, which are the signature features of brown adipocytes, thus altering the white adipocyte phenotype towards brown-like cells. Additionally, commonly used protocols for hASC adipogenic differentiation exhibit high variation in their composition of media, and a systematic comparison of their effect on mitochondria is missing. Here, we compared the five widely used adipogenic differentiation protocols for their effect on metabolic and mitochondrial phenotypes to identify a protocol that enables in vitro differentiation of white adipocytes and can more faithfully recapitulate the white adipocyte phenotype observed in human adipose tissue. We developed a workflow that included functional assays and morphological analysis of mitochondria and lipid droplets. We observed that triiodothyronine- or indomethacin-containing media and commercially available adipogenic media induced browning during in vitro differentiation of white adipocytes. However, the differentiation protocol containing 1 μM of the peroxisome proliferator-activated receptor gamma (PPARγ) agonist rosiglitazone prevented the browning effect and would be proposed for adipogenic differentiation protocol for hASCs to induce a white adipocyte phenotype. Preserving the white adipocyte phenotype in vitro is a crucial step for the study of obesity and associated metabolic diseases, adipose tissue pathologies, such as lipodystrophies, possible therapeutic compounds, and basic adipose tissue physiology.
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Kornicka-Garbowska K, Bourebaba L, Röcken M, Marycz K. Inhibition of protein tyrosine phosphatase improves mitochondrial bioenergetics and dynamics, reduces oxidative stress, and enhances adipogenic differentiation potential in metabolically impaired progenitor stem cells. Cell Commun Signal 2021; 19:106. [PMID: 34732209 PMCID: PMC8565043 DOI: 10.1186/s12964-021-00772-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 07/30/2021] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Protein tyrosine phosphatase 1B (PTP1B) and low molecular weight protein tyrosine phosphatase (LMPTP) are implicated in the development of metabolic disorders. Yet, their role in progenitor stem cell adipogenic differentiation and modulation of mitochondrial dynamics remains elusive. METHODS In this study, we decided to investigate whether inhibition of PTP1B and LMPTP enhance adipogenic differentiation of metabolically impaired progenitor stem cells via modulation of mitochondrial bioenergetics and dynamics. Cells were cultured under adipogenic conditions in the presence of PTP1B and LMPTP inhibitors, and were subjected to the analysis of the main adipogenic-related and mitochondrial-related genes using RT-qPCR. Protein levels were established with western blot while mitochondrial morphology with MicroP software. RESULTS Selective inhibitors of both PTP1B and MPTP enhanced adipogenic differentiation of metabolically impaired progenitor stem cells. We have observed enhanced expression of PPARy and adiponectin in treated cells. What is more, increased antioxidative defence and alternations in mitochondrial bioenergetics were observed. We have found that inhibition of PTP1B as well as C23 activates oxidative phosphorylation and enhances mitochondrial fusion contributing to enhanced adipogenesis. CONCLUSIONS The presented data provides evidence that the application of PTP1B and LMPTP inhibitors enhances adipogenesis through the modulation of mitochondrial dynamics. Video abstract.
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Affiliation(s)
- Katarzyna Kornicka-Garbowska
- Department of Experimental Biology, Wroclaw University of Environmental and Life Sciences, Norwida 27B Street, A7 building, 50-375 Wroclaw, Poland
- International Institute of Translational Medicine, Malin, Jesionowa 11, 55-114 Wisznia Mała, Poland
| | - Lynda Bourebaba
- Department of Experimental Biology, Wroclaw University of Environmental and Life Sciences, Norwida 27B Street, A7 building, 50-375 Wroclaw, Poland
| | - Michael Röcken
- Faculty of Veterinary Medicine, Equine Clinic-Equine Surgery, Justus-Liebig University, 35392 Giessen, Germany
| | - Krzysztof Marycz
- Department of Experimental Biology, Wroclaw University of Environmental and Life Sciences, Norwida 27B Street, A7 building, 50-375 Wroclaw, Poland
- International Institute of Translational Medicine, Malin, Jesionowa 11, 55-114 Wisznia Mała, Poland
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Paris S, Ekeanyanwu R, Jiang Y, Davis D, Spechler SJ, Souza RF. Obesity and its effects on the esophageal mucosal barrier. Am J Physiol Gastrointest Liver Physiol 2021; 321:G335-G343. [PMID: 34405732 DOI: 10.1152/ajpgi.00199.2021] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Obesity is associated with gastroesophageal reflux disease (GERD) and its complications including reflux esophagitis, Barrett's esophagus, and esophageal adenocarcinoma. Traditionally, these associations have been attributed to the mechanical effect of abdominal fat in increasing intra-abdominal pressure, thereby promoting gastroesophageal reflux and causing disruption of antireflux mechanisms at the esophagogastric junction. However, recent studies suggest that visceral adipose tissue (VAT) produces numerous cytokines that can cause esophageal inflammation and impair esophageal mucosal barrier integrity through reflux-independent mechanisms that render the esophageal mucosa especially susceptible to GERD-induced injury. In this report, we review mechanisms of esophageal mucosal defense, the genesis and remodeling of visceral adipose tissue during obesity, and the potential role of substances produced by VAT, especially the VAT that encircles the esophagogastric junction, in the impairment of esophageal mucosal barrier integrity that leads to the development of GERD complications.
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Affiliation(s)
- Shere Paris
- Center for Esophageal Research, Baylor Scott & White Research Institute, Dallas, Texas
| | - Rebecca Ekeanyanwu
- Center for Esophageal Research, Baylor Scott & White Research Institute, Dallas, Texas
| | - Yuwei Jiang
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Daniel Davis
- Center for Esophageal Research, Baylor Scott & White Research Institute, Dallas, Texas.,Department of Surgery, Center for Esophageal Diseases, Baylor University Medical Center, Dallas, Texas
| | - Stuart Jon Spechler
- Center for Esophageal Research, Baylor Scott & White Research Institute, Dallas, Texas.,Department of Medicine, Center for Esophageal Diseases, Baylor University Medical Center, Dallas, Texas
| | - Rhonda F Souza
- Center for Esophageal Research, Baylor Scott & White Research Institute, Dallas, Texas.,Department of Medicine, Center for Esophageal Diseases, Baylor University Medical Center, Dallas, Texas
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Grega T, Vojtechova G, Gregova M, Zavoral M, Suchanek S. Pathophysiological Characteristics Linking Type 2 Diabetes Mellitus and Colorectal Neoplasia. Physiol Res 2021; 70:509-522. [PMID: 34062073 DOI: 10.33549/physiolres.934631] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A substantial body of literature has provided evidence that type 2 diabetes mellitus (T2DM) and colorectal neoplasia share several common factors. Both diseases are among the leading causes of death worldwide and have an increasing incidence. In addition to usual risk factors such as sedentary lifestyle, obesity, and family history, common pathophysiological mechanisms involved in the development of these diseases have been identified. These include changes in glucose metabolism associated with adipose tissue dysfunction including insulin resistance resulting to hyperinsulinemia and chronic hyperglycemia. In addition to altered glucose metabolism, abdominal obesity has been associated with accented carcinogenesis with chronic subclinical inflammation. An increasing number of studies have recently described the role of the gut microbiota in metabolic diseases including T2DM and the development of colorectal cancer (CRC). Due to the interconnectedness of different pathophysiological processes, it is not entirely clear which factor is crucial in the development of carcinogenesis in patients with T2DM. The aim of this work is to review the current knowledge on the pathophysiological mechanisms of colorectal neoplasia development in individuals with T2DM. Here, we review the potential pathophysiological processes involved in the onset and progression of colorectal neoplasia in patients with T2DM. Uncovering common pathophysiological characteristics is essential for understanding the nature of these diseases and may lead to effective treatment and prevention.
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Affiliation(s)
- T Grega
- Department of Internal Medicine, 1st Faculty of Medicine, Charles University, Military University Hospital in Prague, Czech Republic.
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Park J, Shin S, Liu L, Jahan I, Ong SG, Xu P, Berry DC, Jiang Y. Progenitor-like characteristics in a subgroup of UCP1+ cells within white adipose tissue. Dev Cell 2021; 56:985-999.e4. [PMID: 33711247 DOI: 10.1016/j.devcel.2021.02.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 12/17/2020] [Accepted: 02/16/2021] [Indexed: 12/19/2022]
Abstract
Thermogenic beige fat found in white adipose tissue is a potential therapeutic target to curb the global obesity and diabetes epidemic. However, these inducible thermogenic beige adipocytes have been thought to be short-lived and to rapidly convert to "white-like" adipocytes after discontinuing stimuli. In this study, using effective labeling techniques and genetic mouse tools, we demonstrate that a subset of UCP1+ cells that exist within white adipose tissue are able to self-divide and contribute to new beige adipocyte recruitment in response to β3 stimuli. When these cells are depleted or their adipogenic capability is blocked, β3-induced beige adipocyte formation is impaired. We also identify a cell-cycle machinery of p21 and CDKN2A as a molecular basis of beige adipocyte regulation. Collectively, our findings provide new insights into the cellular and molecular mechanisms of beige adipocyte regulation and potential therapeutic opportunities to induce the beige phenotype and treat metabolic disease.
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Affiliation(s)
- Jooman Park
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Sunhye Shin
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Lifeng Liu
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Iffat Jahan
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Sang-Ging Ong
- Department of Pharmacology and Regenerative Medicine, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA; Division of Cardiology, Department of Medicine, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Pingwen Xu
- Division of Endocrinology, Department of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Daniel C Berry
- Division of Nutritional Sciences, Cornell University, Ithaca, NY 14853, USA
| | - Yuwei Jiang
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA.
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Piceatannol Is Superior to Resveratrol at Suppressing Adipogenesis in Human Visceral Adipose-Derived Stem Cells. PLANTS 2021; 10:plants10020366. [PMID: 33672932 PMCID: PMC7918058 DOI: 10.3390/plants10020366] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/07/2021] [Accepted: 02/09/2021] [Indexed: 01/21/2023]
Abstract
Resveratrol (3,4′,5-trans-trihydroxystilbene) and piceatannol (3,3′,4′,5-trans-tetraphydroxystilbene) are major stilbene compounds that are predominantly present in various natural foods, such as berries and fruits. Both phytochemical compounds are consumed as dietary supplements to prevent various metabolic diseases and for their anti-aging properties. Adipose-derived stem cells from human visceral adipose tissue (vASCs) are a useful in vitro model for evaluating their adipogenic effect. Treatment with resveratrol and piceatannol significantly inhibited lipid accumulation in vASCs. Their effective concentrations were 5, 10, and 20 μM for inhibiting adipogenesis of vASCs. Interestingly, despite the similar chemical structures of the two compounds, piceatannol showed a higher anti-adipogenic effect at 20 μM than resveratrol in vASCs. Moreover, the inhibitory capacity of lipid droplet generation was higher for piceatannol at 20 μM than that of resveratrol. Piceatannol significantly attenuated the expression level of adipogenic markers (e.g., CCAAT/enhanced binding protein α (C/EBPα), peroxisome proliferator-activated receptor γ (PPARγ), and adipocyte fatty acid binding protein (aP2)) compared to resveratrol at the mRNA and protein levels. These results suggest that piceatannol is a superior anti-adipogenic compound compared to resveratrol in the vASC model of visceral obesity.
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Juchnicka I, Kuźmicki M, Szamatowicz J. Ceramides and Sphingosino-1-Phosphate in Obesity. Front Endocrinol (Lausanne) 2021; 12:635995. [PMID: 34054722 PMCID: PMC8158155 DOI: 10.3389/fendo.2021.635995] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 04/16/2021] [Indexed: 12/12/2022] Open
Abstract
Obesity is a growing worldwide problem, especially in developed countries. This disease adversely affects the quality of life and notably contributes to the development of type 2 diabetes, metabolic syndrome, and cardiovascular disorders. It is characterised by excessive lipids accumulation in the subcutaneous and visceral adipose tissue. Considering the secretory function of adipose tissue, this leads to impaired adipokines and cytokines release. Changes in adipose tissue metabolism result in chronic inflammation, pancreatic islets dysfunction and peripheral insulin resistance. In addition to saturating various adipocytes, excess lipids are deposited into non-adipose peripheral tissues, which disturbs cell metabolism and causes a harmful effect known as lipotoxicity. Fatty acids are metabolised into bioactive lipids such as ceramides, from which sphingolipids are formed. Ceramides and sphingosine-1-phosphate (S1P) are involved in intracellular signalling, cell proliferation, migration, and apoptosis. Studies demonstrate that bioactive lipids have a crucial role in regulating insulin signalling pathways, glucose homeostasis and β cell death. Data suggests that ceramides may have an opposite cellular effect than S1P; however, the role of S1P remains controversial. This review summarises the available data on ceramide and sphingolipid metabolism and their role in obesity.
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