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Khan S, Hasan N, Khan S, Akhtar M, Akhtar M, Najmi AK. Exploring effects of Simvastatin on coagulation mediators to alleviate the advancement of high cholesterol diet triggered neurodegeneration. J Biochem Mol Toxicol 2023:e23342. [PMID: 36992618 DOI: 10.1002/jbt.23342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 01/17/2023] [Accepted: 03/20/2023] [Indexed: 03/31/2023]
Abstract
The objectives of our study were to investigate the possible effect of Simvastatin in ameliorating high cholesterol diet (HCD)-induced neurodegeneration and to also investigate its possible action on coagulation mediators. In silico and in vitro studies were performed to evaluate the impact of Simvastatin on prime coagulation mediators. HCD was used to induce neuropathology in wistar rats and histopathological and immunohistochemical studies were performed to evaluate the efficacy of Simvastatin in preventing the advancement of neurodegeneration in obese rats. Biochemical analyses were used to estimate changes in lipid profile, oxidative stress, inflammatory and coagulation markers. Simvastatin showed good theoretical affinity to coagulation proteins, significantly reversed changes in inflammatory and coagulation biomarkers which were induced by HCD. Enhanced fibrinolytic activity of Simvastatin was revealed through in vitro analysis. Immunohistoanalysis showed raised level of Nrf2. Histopathological studies also supported neuroprotective potential of Simvastatin in HCD fed rats. Simvastatin demonstrated reduced hypercoagulation, enhanced fibrinolysis and reversed neurodegeneration in HCD exposed rats suggesting its potential role in preventing the progression of neurodegeneration in obesity.
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Affiliation(s)
- Sana Khan
- Department of Pharmacology, School of Pharmaceutical Education & Research, Jamia Hamdard, New Delhi, India
| | - Noorul Hasan
- Department of Pharmacology, School of Pharmaceutical Education & Research, Jamia Hamdard, New Delhi, India
| | - Saba Khan
- Department of Pharmaceutics, School of Pharmaceutical Education & Research, Jamia Hamdard, New Delhi, India
| | - Mymoona Akhtar
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education & Research, Jamia Hamdard, New Delhi, India
| | - Mohammad Akhtar
- Department of Pharmacology, School of Pharmaceutical Education & Research, Jamia Hamdard, New Delhi, India
| | - Abul Kalam Najmi
- Department of Pharmacology, School of Pharmaceutical Education & Research, Jamia Hamdard, New Delhi, India
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2
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Su YH, Wu YZ, Ann DK, Chen JLY, Kuo CY. Obesity promotes radioresistance through SERPINE1-mediated aggressiveness and DNA repair of triple-negative breast cancer. Cell Death Dis 2023; 14:53. [PMID: 36681663 PMCID: PMC9867751 DOI: 10.1038/s41419-023-05576-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/08/2023] [Accepted: 01/09/2023] [Indexed: 01/22/2023]
Abstract
Obesity is a risk factor in various types of cancer, including breast cancer. The disturbance of adipose tissue in obesity highly correlates with cancer progression and resistance to standard treatments such as chemo- and radio-therapies. In this study, in a syngeneic mouse model of triple-negative breast cancer (TNBC), diet-induced obesity (DIO) not only promoted tumor growth, but also reduced tumor response to radiotherapy. Serpine1 (Pai-1) was elevated in the circulation of obese mice and was enriched within tumor microenvironment. In vitro co-culture of human white adipocytes-conditioned medium (hAd-CM) with TNBC cells potentiated the aggressive phenotypes and radioresistance of TNBC cells. Moreover, inhibition of both cancer cell autonomous and non-autonomous SERPINE1 by either genetic or pharmacological strategy markedly dampened the aggressive phenotypes and radioresistance of TNBC cells. Mechanistically, we uncovered a previously unrecognized role of SERPINE1 in DNA damage response. Ionizing radiation-induced DNA double-strand breaks (DSBs) increased the expression of SERPINE1 in cancer cells in an ATM/ATR-dependent manner, and promoted nuclear localization of SERPINE1 to facilitate DSB repair. By analyzing public clinical datasets, higher SERPINE1 expression in TNBC correlated with patients' BMI as well as poor outcomes. Elevated SERPINE1 expression and nuclear localization were also observed in radioresistant breast cancer cells. Collectively, we reveal a link between obesity and radioresistance in TNBC and identify SERPINE1 to be a crucial factor mediating obesity-associated tumor radioresistance.
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Affiliation(s)
- Yong-Han Su
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yi-Zhen Wu
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - David K Ann
- Department of Diabetes Complications & Metabolism, City of Hope, Duarte, CA, USA
- Irell and Manella Graduate School of Biological Sciences, City of Hope, Duarte, CA, USA
| | - Jenny Ling-Yu Chen
- Department of Radiology, National Taiwan University College of Medicine, Taipei, Taiwan
- Department of Radiation Oncology, National Taiwan University Cancer Center, Taipei, Taiwan
| | - Ching-Ying Kuo
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei, Taiwan.
- Department of Laboratory Medicine, National Taiwan University Hospital, Taipei, Taiwan.
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3
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Speelman T, Dale L, Louw A, Verhoog NJD. The Association of Acute Phase Proteins in Stress and Inflammation-Induced T2D. Cells 2022; 11:2163. [PMID: 35883605 PMCID: PMC9321356 DOI: 10.3390/cells11142163] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/02/2022] [Accepted: 07/04/2022] [Indexed: 02/06/2023] Open
Abstract
Acute phase proteins (APPs), such as plasminogen activator inhibitor-1 (PAI-1), serum amyloid A (SAA), and C-reactive protein (CRP), are elevated in type-2 diabetes (T2D) and are routinely used as biomarkers for this disease. These APPs are regulated by the peripheral mediators of stress (i.e., endogenous glucocorticoids (GCs)) and inflammation (i.e., pro-inflammatory cytokines), with both implicated in the development of insulin resistance, the main risk factor for the development of T2D. In this review we propose that APPs, PAI-1, SAA, and CRP, could be the causative rather than only a correlative link between the physiological elements of risk (stress and inflammation) and the development of insulin resistance.
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Affiliation(s)
| | | | | | - Nicolette J. D. Verhoog
- Biochemistry Department, Stellenbosch University, Van der Byl Street, Stellenbosch 7200, South Africa; (T.S.); (L.D.); (A.L.)
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Samad F, Bai H, Baik N, Haider P, Zhang Y, Rega-Kaun G, Kaun C, Prager M, Wojta J, Bui Q, Chakrabarty S, Wang J, Parmer RJ, Miles LA. The plasminogen receptor Plg-R KT regulates adipose function and metabolic homeostasis. J Thromb Haemost 2022; 20:742-754. [PMID: 34897983 PMCID: PMC8885904 DOI: 10.1111/jth.15622] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 11/30/2021] [Accepted: 12/10/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Plg-RKT , a unique transmembrane plasminogen receptor, enhances the activation of plasminogen to plasmin, and localizes the proteolytic activity of plasmin on the cell surface. OBJECTIVES We investigated the role of Plg-RKT in adipose function, metabolic homeostasis, and obesity. METHODS We used adipose tissue (AT) sections from bariatric surgery patients and from high fat diet (HFD)-induced obese mice together with immunofluorescence and real-time polymerase chain reaction to study adipose expression of Plg-RKT . Mice genetically deficient in Plg-RKT and littermate controls fed a HFD or control low fat diet (LFD) were used to determine the role of Plg-RKT in insulin resistance, glucose tolerance, type 2 diabetes, and associated mechanisms including adipose inflammation, fibrosis, and ectopic lipid storage. The role of Plg-RKT in adipogenesis was determined using 3T3-L1 preadipocytes and primary cultures established from Plg-RKT -deficient and littermate control mice. RESULTS Plg-RKT was highly expressed in both human and mouse AT, and its levels dramatically increased during adipogenesis. Plg-RKT -deficient mice, when fed a HFD, gained more weight, developed more hepatic steatosis, and were more insulin resistant/glucose intolerant than HFD-fed wild-type littermates. Mechanistically, these metabolic defects were linked with increased AT inflammation, AT macrophage and T-cell accumulation, adipose and hepatic fibrosis, and decreased insulin signaling in the AT and liver. Moreover, Plg-RKT regulated the expression of PPARγ and other adipogenic molecules, suggesting a novel role for Plg-RKT in the adipogenic program. CONCLUSIONS Plg-RKT coordinately regulates multiple aspects of adipose function that are important to maintain efficient metabolic homeostasis.
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Affiliation(s)
- Fahumiya Samad
- Department of Cell Biology, San Diego Biomedical Research Institute, San Diego, CA, USA
| | - Hongdong Bai
- Department of Medicine, Veterans Administration San Diego Healthcare System, San Diego
| | - Nagyung Baik
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA
| | - Patrick Haider
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Yuqing Zhang
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA
| | - Gersina Rega-Kaun
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
- 5th Department of Internal Medicine for Diabetes and Rheumatology, Wilhelminen Hospital, Vienna, Austria
| | - Christoph Kaun
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Manfred Prager
- Department of Surgery, Hospital Oberwart, Oberwart, Austria
| | - Johann Wojta
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
- Ludwig Boltzmann Institute for Cardiovascular Research, Vienna
| | - Quyen Bui
- Department of Cell Biology, San Diego Biomedical Research Institute, San Diego, CA, USA
| | - Sagarika Chakrabarty
- Department of Cell Biology, San Diego Biomedical Research Institute, San Diego, CA, USA
| | - Jing Wang
- Department of Cell Biology, San Diego Biomedical Research Institute, San Diego, CA, USA
| | - Robert J. Parmer
- Department of Medicine, Veterans Administration San Diego Healthcare System, San Diego
- Department of Medicine, University of California San Diego, La Jolla, CA
| | - Lindsey A. Miles
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA
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Ren Y, Zhao H, Yin C, Lan X, Wu L, Du X, Griffiths HR, Gao D. Adipokines, Hepatokines and Myokines: Focus on Their Role and Molecular Mechanisms in Adipose Tissue Inflammation. Front Endocrinol (Lausanne) 2022; 13:873699. [PMID: 35909571 PMCID: PMC9329830 DOI: 10.3389/fendo.2022.873699] [Citation(s) in RCA: 51] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 06/17/2022] [Indexed: 11/18/2022] Open
Abstract
Chronic low-grade inflammation in adipose tissue (AT) is a hallmark of obesity and contributes to various metabolic disorders, such as type 2 diabetes and cardiovascular diseases. Inflammation in ATs is characterized by macrophage infiltration and the activation of inflammatory pathways mediated by NF-κB, JNK, and NLRP3 inflammasomes. Adipokines, hepatokines and myokines - proteins secreted from AT, the liver and skeletal muscle play regulatory roles in AT inflammation via endocrine, paracrine, and autocrine pathways. For example, obesity is associated with elevated levels of pro-inflammatory adipokines (e.g., leptin, resistin, chemerin, progranulin, RBP4, WISP1, FABP4, PAI-1, Follistatin-like1, MCP-1, SPARC, SPARCL1, and SAA) and reduced levels of anti-inflammatory adipokines such as adiponectin, omentin, ZAG, SFRP5, CTRP3, vaspin, and IL-10. Moreover, some hepatokines (Fetuin A, DPP4, FGF21, GDF15, and MANF) and myokines (irisin, IL-6, and DEL-1) also play pro- or anti-inflammatory roles in AT inflammation. This review aims to provide an updated understanding of these organokines and their role in AT inflammation and related metabolic abnormalities. It serves to highlight the molecular mechanisms underlying the effects of these organokines and their clinical significance. Insights into the roles and mechanisms of these organokines could provide novel and potential therapeutic targets for obesity-induced inflammation.
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Affiliation(s)
- Yakun Ren
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
| | - Hao Zhao
- School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Chunyan Yin
- Department of Pediatrics, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Xi Lan
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Litao Wu
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Xiaojuan Du
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, China
| | - Helen R. Griffiths
- Swansea University Medical School, Swansea University, Swansea, United Kingdom
| | - Dan Gao
- Institute of Molecular and Translational Medicine, Xian Jiaotong University Health Science Center, Xi’an, China
- Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Center, Xi’an, China
- *Correspondence: Dan Gao,
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Abstract
Obesity is a major risk factor for the development of comorbidities such as type 2 diabetes, neurodegenerative disorders, osteoarthritis, cancer, cardiovascular and renal diseases. The onset of obesity is linked to an increase of senescent cells within adipose tissue and other organs. Cellular senescence is a stress response that has been shown to be causally linked to aging and development of various age-related diseases such as obesity. The senescence-associated-secretory phenotype of senescent cells creates a chronic inflammatory milieu that leads to local and systemic dysfunction. The elimination of senescent cells using pharmacological approaches (i.e., senolytics) has been shown to delay, prevent, or alleviate obesity-related organ dysfunction.
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Affiliation(s)
- Selim Chaib
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA
| | - Tamara Tchkonia
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA
| | - James L Kirkland
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA.
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Frischmuth T, Hindberg K, Aukrust P, Ueland T, Brækkan SK, Hansen JB, Morelli VM. Plasma Levels of Leptin and Risk of Future Incident Venous Thromboembolism. Thromb Haemost 2021; 122:560-569. [PMID: 34264516 DOI: 10.1055/s-0041-1732295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Circulating levels of leptin, an adipocyte-derived hormone, are frequently elevated in obesity. Leptin has been reported to upregulate prothrombotic hemostatic factors in vitro and could potentially mediate venous thromboembolism (VTE) risk in obesity. However, whether leptin is associated with VTE remains uncertain. OBJECTIVE This article investigates the association between plasma leptin and risk of incident VTE, and the potential of leptin to mediate VTE risk in obesity. METHODS A population-based nested case-control study with 416 VTE cases and 848 age- and sex-matched controls was derived from the Tromsø Study. Logistic regression was used to calculate odds ratios (ORs) with 95% confidence intervals (CIs) for VTE across leptin quartiles. Analyses were performed separately in men and women using sex-specific quartile cut-offs determined in controls. RESULTS In the age-adjusted model, the VTE risk increased across leptin quartiles, particularly in men. Compared with the lowest quartile, the ORs for VTE in the highest quartile were 1.70 (95% CI 1.04-2.79) in men and 1.36 (95% CI 0.85-2.17) in women. However, with additional adjustment for body mass index (BMI), risk estimates were markedly attenuated in men (OR 1.03, 95% CI 0.55-1.93) and women (OR 0.82, 95% CI 0.45-1.48). The ORs for VTE were increased in obese men and women (BMI ≥ 30 kg/m2) and were only marginally affected after adjustment for leptin. CONCLUSION Our results indicate that the apparent association between plasma leptin levels and VTE risk is confounded by BMI and that leptin is not a relevant mediator for VTE risk in obesity.
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Affiliation(s)
- Tobias Frischmuth
- Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway
| | - Kristian Hindberg
- Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway
| | - Pål Aukrust
- Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway.,Research Institute of Internal Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway.,Section of Clinical Immunology and Infectious Diseases, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Thor Ueland
- Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway.,Research Institute of Internal Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Sigrid K Brækkan
- Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway.,Division of Internal Medicine, University Hospital of North Norway, Tromsø, Norway
| | - John-Bjarne Hansen
- Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway.,Division of Internal Medicine, University Hospital of North Norway, Tromsø, Norway
| | - Vânia M Morelli
- Department of Clinical Medicine, Thrombosis Research Center, UiT - The Arctic University of Norway, Tromsø, Norway
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Ramadan MS, Russo V, Nigro G, Durante-Mangoni E, Zampino R. Interplay between Heart Disease and Metabolic Steatosis: A Contemporary Perspective. J Clin Med 2021; 10:jcm10081569. [PMID: 33917867 PMCID: PMC8068259 DOI: 10.3390/jcm10081569] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 03/26/2021] [Accepted: 04/03/2021] [Indexed: 12/12/2022] Open
Abstract
The liver-heart axis is a growing field of interest owing to rising evidence of complex bidirectional interplay between the two organs. Recent data suggest non-alcoholic fatty liver disease (NAFLD) has a significant, independent association with a wide spectrum of structural and functional cardiac diseases, and seems to worsen cardiovascular disease (CVD) prognosis. Conversely, the effect of cardiac disease on NAFLD is not well studied and data are mostly limited to cardiogenic liver disease. We believe it is important to further investigate the heart-liver relationship because of the tremendous global health and economic burden the two diseases pose, and the impact of such investigations on clinical decision making and management guidelines for both diseases. In this review, we summarize the current knowledge on NAFLD diagnosis, its systemic manifestations, and associations with CVD. More specifically, we review the pathophysiological mechanisms that govern the interplay between NAFLD and CVD and evaluate the relationship between different CVD treatments and NAFLD progression.
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Affiliation(s)
- Mohammad Said Ramadan
- Department of Precision Medicine, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy;
| | - Vincenzo Russo
- Department of Translational Medical Sciences, AORN Ospedali dei Colli-Monaldi Hospital, 80131 Naples, Italy; (V.R.); (G.N.)
- Cardiology Unit, AORN Ospedali dei Colli-Monaldi Hospital, 80131 Naples, Italy
| | - Gerardo Nigro
- Department of Translational Medical Sciences, AORN Ospedali dei Colli-Monaldi Hospital, 80131 Naples, Italy; (V.R.); (G.N.)
- Cardiology Unit, AORN Ospedali dei Colli-Monaldi Hospital, 80131 Naples, Italy
| | - Emanuele Durante-Mangoni
- Department of Precision Medicine, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy;
- Infectious and Transplant Medicine Unit, AORN Ospedali dei Colli-Monaldi Hospital, 80131 Naples, Italy;
- Correspondence:
| | - Rosa Zampino
- Infectious and Transplant Medicine Unit, AORN Ospedali dei Colli-Monaldi Hospital, 80131 Naples, Italy;
- Department of Advanced Medical and Surgical Sciences, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy
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9
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Purdy JC, Shatzel JJ. The hematologic consequences of obesity. Eur J Haematol 2020; 106:306-319. [PMID: 33270290 DOI: 10.1111/ejh.13560] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 11/28/2020] [Accepted: 12/01/2020] [Indexed: 12/12/2022]
Abstract
The prevalence of obesity is increasing and progressively influencing physician-patient interactions. While there is a sizable amount of data demonstrating that obesity is a state of low-grade inflammation, to our knowledge, there is no single review summarizing its effects on hematologic parameters and thrombotic risk. We performed a literature search which largely surfaced observational studies, with a few systematic reviews and meta-analyses of these studies. We took care to review the mechanisms driving an inflammatory state and obesity's effect on white blood cells, red blood cells, platelets, and thrombotic risk. There is an observed relative, and sometimes absolute leukocytosis driven by this inflammatory state. Obesity is also associated with increased platelet counts and an increased risk for venous thromboembolism (VTE). Lastly, the association between obesity, iron deficiency (ID), and red blood cell counts may be present but remains uncertain. Recognizing the above associations may provide clinicians with reassurance regarding otherwise unexplained hematologic abnormalities in obese individuals. We hope this review will prompt future studies to further understand the underlying mechanisms driving these abnormalities and identify modifiable risk factors and potential therapeutic targets to prevent the development of probable obesity-associated conditions with significant morbidity and mortality, such as ID and VTE.
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Affiliation(s)
- Johanna C Purdy
- Division of General Internal Medicine and Geriatrics, Oregon Health & Science University, Portland, OR, USA
| | - Joseph J Shatzel
- Division of Hematology and Oncology, Oregon Health & Science University, Portland, OR, USA.,Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR, USA
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10
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Sahin E, Orhan C, Uckun FM, Sahin K. Clinical Impact Potential of Supplemental Nutrients as Adjuncts of Therapy in High-Risk COVID-19 for Obese Patients. Front Nutr 2020; 7:580504. [PMID: 33195370 PMCID: PMC7642511 DOI: 10.3389/fnut.2020.580504] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 09/10/2020] [Indexed: 01/08/2023] Open
Abstract
The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) disease (COVID-19) in China at the end of 2019 caused a major global pandemic and continues to be an unresolved global health crisis. The supportive care interventions for reducing the severity of symptoms along with participation in clinical trials of investigational treatments are the mainstay of COVID-19 management because there is no effective standard therapy for COVID-19. The comorbidity of COVID-19 rises in obese patients. Micronutrients may boost the host immunity against viral infections, including COVID-19. In this review, we discuss the clinical impact potential of supplemental nutrients as adjuncts of therapy in high-risk COVID-19 for obese patients.
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Affiliation(s)
- Emre Sahin
- Department of Nutrition, School of Veterinary Medicine, Firat University, Elazig, Turkey
| | - Cemal Orhan
- Department of Nutrition, School of Veterinary Medicine, Firat University, Elazig, Turkey
| | - Fatih M. Uckun
- COVID-19 Task Force, Reven Pharmaceuticals, Golden, CO, United States
- Department of Developmental Therapeutics, Immunology and Integrative Medicine, Ares Pharmaceuticals, St. Paul, MN, United States
| | - Kazim Sahin
- Department of Nutrition, School of Veterinary Medicine, Firat University, Elazig, Turkey
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11
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Ito K. Effect of water-extractive components from funazushi, a fermented crucian carp, on the activity of fibrinolytic factors. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:2482-2487. [PMID: 31960427 DOI: 10.1002/jsfa.10269] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 01/14/2020] [Accepted: 01/21/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND Japanese fermented foods, including funazushi, have have been studied insufficiently. Related research into fermented products has led to the hope that they might have positive effects on blood circulation, including anti-thrombosis effects. The possible antithrombotic effects of funazushi on the fibrinolytic system were examined. RESULTS The administration of extracts from funazushi increased the activity of plasmin and tissue plasminogen activators in the fibrinolytic system but decreased the activity of plasminogen activator inhibitor type-1 (PAI-1). This decrease was positively correlated with the decreased plasma triglyceride levels. Funazushi extract directly inhibited PAI-1 activity in vitro despite alimentary enzyme digestion, although direct PAI-1 inhibition was not observed in an extract from salted crucian carp. CONCLUSION These results suggest that funazushi extracts are closely involved in the antithrombotic effects of the fibrinolytic system, and that they exert their effect through a reduction in PAI-1 activity. The findings also indicate that fermentation processing is necessary to achieve the antithrombotic effects of funazushi. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Koji Ito
- Department of Marine Bioscience, Fukui Prefectural University, Obama, Japan
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12
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Cho NH, Ku EJ, Jung KY, Oh TJ, Kwak SH, Moon JH, Park KS, Jang HC, Kim YJ, Choi SH. Estimated Association Between Cytokines and the Progression to Diabetes: 10-year Follow-Up From a Community-Based Cohort. J Clin Endocrinol Metab 2020; 105:5613648. [PMID: 31690939 PMCID: PMC7069551 DOI: 10.1210/clinem/dgz171] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 11/05/2019] [Indexed: 12/24/2022]
Abstract
CONTEXT The long-term association between multiple cytokines and progression to diabetes is still uncertain. OBJECTIVE To identify which cytokines could predict progression to prediabetes and type 2 diabetes over 10 years. METHODS The study included 912 participants aged 40 to 69 years at baseline from the Ansung cohort, part of the Korea Genome Epidemiology Study. At baseline, a 75-g oral glucose tolerance test and 8 cytokines were measured: plasminogen activator inhibitor 1 (PAI-1), resistin, interleukin 6, leptin, monocyte chemoattractant protein 1, tumor necrosis factor alpha, retinol binding protein 4 (RBP4), and adiponectin. People with normal glucose tolerance (NGT, n = 241) and prediabetes (n = 330) were followed-up biennially for 10 years. Multinomial logistic regression analysis was used to evaluate the predictability of cytokines on the new-onset prediabetes and type 2 diabetes. RESULTS At 10 years, 38 (15.8%) and 82 (34.0%) of those with NGT had converted to prediabetes and type 2 diabetes, respectively. Of those with prediabetes, 228 (69.1%) had converted to type 2 diabetes. In people with NGT or prediabetes at baseline, the highest tertile of RBP4 was associated with a 5.48-fold and 2.43-fold higher risk of progression to type 2 diabetes, respectively. The odds for converting from NGT to prediabetes in the highest tertile of PAI-1 and the lowest tertile of adiponectin were 3.23 and 3.37, respectively. In people with prediabetes at baseline, those in the highest tertile of resistin were 2.94 time more likely to develop type 2 diabetes (all P < 0.05). CONCLUSIONS In this 10-year prospective study, NGT with higher serum RBP4 and PAI-1, and with lower adiponectin were associated with new-onset prediabetes and type 2 diabetes.
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Affiliation(s)
- Nam H Cho
- Department of Preventive Medicine, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Eu Jeong Ku
- Department of Internal Medicine, Chungbuk National University Hospital and Chungbuk National University College of Medicine, Cheongju, Republic of Korea
| | - Kyoung Yeon Jung
- Department of Internal Medicine, Nowon Eulji Medical Center, Eulji Hospital, Seoul, Republic of Korea
| | - Tae Jung Oh
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Soo Heon Kwak
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jae Hoon Moon
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Kyong Soo Park
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hak C Jang
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Yoon Ji Kim
- Department of Internal Medicine, Mediplex Sejong Hospital, Incheon, Republic of Korea
| | - Sung Hee Choi
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
- Correspondence and Reprint Requests: Professor Sung Hee Choi, Department of Internal Medicine, Seoul National University Bundang Hospital, 173–82 Gumi-ro, Seongnam, Republic of Korea 463–707. E-mail:
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13
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Aremu AO, Lilian DC, Olufemi SA, Aderemi OL. Combined but not single treatment with ethinylestradiol/levonorgestrel and spironolactone reduces plasminogen activator inhibitor-1 in insulin-resistant ovariectomised rats. J Renin Angiotensin Aldosterone Syst 2019; 20:1470320319895933. [PMID: 31856649 PMCID: PMC6927203 DOI: 10.1177/1470320319895933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Objective: Increased circulating level of plasminogen activator inhibitor-1 (PAI-1) is
associated with menopausal oestrogen deficiency. We therefore hypothesised
that the combined oral contraceptive (COC) with spironolactone (SPL)
improves insulin resistance (IR) in ovariectomised (OVX) rats by reducing
circulating PAI-1. Methods: Twelve-week-old female Wistar rats were divided into sham-operated (SHM),
OVX, OVX+SPL (0.25 mg/kg), COC (1.0 µg ethinylestradiol and 5.0 µg
levonorgestrel) and OVX+COC+SPL rats treated with COC and SPL daily for
eight weeks. IR was assessed by homeostatic model assessment of IR
(HOMA-IR). Results: Data showed that OVX rats had a higher HOMA-IR value that is associated with
increased visceral adiposity, triglycerides (TG), total
cholesterol/high-density lipoprotein cholesterol (HDL-C), TG/HDL-C, plasma
insulin, GSK-3, corticosterone and decreased 17β-oestradiol. However, these
effects were attenuated in OVX+COC, OVX+SPL and OVX+COC+SPL rats compared to
OVX rats. OVX rats had lower PAI-1 than SHM rats, whereas the beneficial
effect on IR and other parameters by COC or SPL was accompanied with
increased PAI-1. Improvement of IR and other parameters with combined COC
and SPL in OVX rats was accompanied with reduced PAI-1. Conclusion: Taken together, COC or SPL improves IR independent of PAI-1, whereas a
combination of COC and SPL in OVX rats ameliorates IR in a PAI-1-dependent
manner.
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Affiliation(s)
- Adeyanju Oluwaseun Aremu
- HOPE Cardiometabolic Research Team and Department of Physiology, University of Ilorin, Nigeria.,Cardiometabolic Research Unit, Department of Physiology, College of Medicine and Health Sciences, Afe Babalola University, Nigeria
| | - Dibia Chinaza Lilian
- HOPE Cardiometabolic Research Team and Department of Physiology, University of Ilorin, Nigeria
| | - Soladoye Ayodele Olufemi
- Cardiometabolic Research Unit, Department of Physiology, College of Health sciences, Bowen University, Nigeria
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14
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The endothelial tumor suppressor p53 is essential for venous thrombus formation in aged mice. Blood Adv 2019; 2:1300-1314. [PMID: 29891592 DOI: 10.1182/bloodadvances.2017014050] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 05/11/2018] [Indexed: 12/24/2022] Open
Abstract
Venous thromboembolism (VTE) is a leading cause of morbidity and mortality in elderly people. Increased expression of tumor suppressor protein 53 (p53) has been implicated in vascular senescence. Here, we examined the importance of endothelial p53 for venous thrombosis and whether endothelial senescence and p53 overexpression are involved in the exponential increase of VTE with age. Mice with conditional, endothelial-specific deletion of p53 (End.p53-KO) and their wild-type littermates (End.p53-WT) underwent subtotal inferior vena cava (IVC) ligation to induce venous thrombosis. IVC ligation in aged (12-month-old) End.p53-WT mice resulted in higher rates of thrombus formation and greater mean thrombus size vs adult (12-week-old) End.p53-WT mice, whereas aged End.p53-KO mice were protected from vein thrombosis. Analysis of primary endothelial cells from aged mice or human vein endothelial cells after induction of replicative senescence revealed significantly increased early growth response gene-1 (Egr1) and heparanase expression, and plasma factor Xa levels were elevated in aged End.p53-WT, but not in End.p53-KO mice. Increased endothelial Egr1 and heparanase expression also was observed after doxorubicin-induced p53 overexpression, whereas p53 inhibition using pifithrin-α reduced tissue factor (TF) expression. Importantly, inhibition of heparanase activity using TF pathway inhibitor-2 (TFPI2) peptides prevented the enhanced venous thrombus formation in aged mice and restored it to the thrombotic phenotype of adult mice. Our findings suggest that p53 accumulation and heparanase overexpression in senescent endothelial cells are critically involved in mediating the increased risk of venous thrombosis with age and that heparanase antagonization may be explored as strategy to ameliorate the prothrombotic endothelial phenotype with age.
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15
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Goldmannová D, Spurná J, Krystyník O, Schovánek J, Cibičková L, Karásek D, Zadražil J. Adipocytokines and new onset diabetes mellitus after transplantation. J Appl Biomed 2018. [DOI: 10.1016/j.jab.2018.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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16
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Vilahur G, Ben-Aicha S, Badimon L. New insights into the role of adipose tissue in thrombosis. Cardiovasc Res 2018; 113:1046-1054. [PMID: 28472252 DOI: 10.1093/cvr/cvx086] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 04/28/2017] [Indexed: 01/02/2023] Open
Abstract
Central obesity is independently associated with an elevated risk of cardiovascular disease, particularly thrombotic complications. Increasing data supports a link between excess body weight and the risk to suffer acute myocardial infarction, stent thrombosis after percutaneous interventions, ischemic stroke and vein thrombosis. Experimental and in vitro data have provided insights as to the mechanisms currently presumed to increase the thrombotic risk in obese subjects. Obesity is characterized by a chronic low grade inflammation and systemic oxidative stress that eventually damage the endothelium losing its antithrombotic properties. Obesity also stimulates the expression of leptin and attenuates adiponectin release, a protective adipokine. Although the contribution of adipokines to thrombosis has been questioned, recent work has suggested that they enhance platelet activation and, although to a lesser extent, induce the coagulation cascade through tissue factor (TF) expression. Increased body weight also impairs platelet sensitivity to insulin signaling and enhances the production of bioactive isoprostanes further promoting platelet reactivity. Finally, obese subjects have shown elevated circulating levels of von Willebrand factor, TF, factor VII and VIII, and fibrinogen, favoring a mild-to-moderate hypercoagulable state, and, on the other hand, increased secretion of plasminogen activator inhibitor (PAI)-1 and thrombin activatable fibrinolysis inhibitor (TAFI) contributing to impair the fibrinolytic system. In the present review, we provide an overview of the impact of excess body weight on thrombosis. We will focus on the link between dysfunctional adipose tissue and endothelial damage, platelet reactivity, enhanced coagulation and impaired fibrinolysis; mechanisms currently recognized to increase arterial thrombotic risk in obese subjects.
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Affiliation(s)
- Gemma Vilahur
- Cardiovascular Science Institute-ICCC, IIB-Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,CIBERCV Instituto Salud Carlos III, Madrid, Spain
| | - Soumaya Ben-Aicha
- Cardiovascular Science Institute-ICCC, IIB-Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Lina Badimon
- Cardiovascular Science Institute-ICCC, IIB-Sant Pau, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,CIBERCV Instituto Salud Carlos III, Madrid, Spain.,Cardiovascular Research Chair, UAB, Barcelona, Spain
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17
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Coudriet GM, Delmastro-Greenwood MM, Previte DM, Marré ML, O'Connor EC, Novak EA, Vincent G, Mollen KP, Lee S, Dong HH, Piganelli JD. Treatment with a Catalytic Superoxide Dismutase (SOD) Mimetic Improves Liver Steatosis, Insulin Sensitivity, and Inflammation in Obesity-Induced Type 2 Diabetes. Antioxidants (Basel) 2017; 6:antiox6040085. [PMID: 29104232 PMCID: PMC5745495 DOI: 10.3390/antiox6040085] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 10/26/2017] [Accepted: 10/31/2017] [Indexed: 02/06/2023] Open
Abstract
Oxidative stress and persistent inflammation are exaggerated through chronic over-nutrition and a sedentary lifestyle, resulting in insulin resistance. In type 2 diabetes (T2D), impaired insulin signaling leads to hyperglycemia and long-term complications, including metabolic liver dysfunction, resulting in non-alcoholic fatty liver disease (NAFLD). The manganese metalloporphyrin superoxide dismustase (SOD) mimetic, manganese (III) meso-tetrakis (N-ethylpyridinium-2-yl) porphyrin (MnP), is an oxidoreductase known to scavenge reactive oxygen species (ROS) and decrease pro-inflammatory cytokine production, by inhibiting nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) activation. We hypothesized that targeting oxidative stress-induced inflammation with MnP would assuage liver complications and enhance insulin sensitivity and glucose tolerance in a high-fat diet (HFD)-induced mouse model of T2D. During 12 weeks of feeding, we saw significant improvements in weight, hepatic steatosis, and biomarkers of liver dysfunction with redox modulation by MnP treatment in HFD-fed mice. Additionally, MnP treatment improved insulin sensitivity and glucose tolerance, while reducing serum insulin and leptin levels. We attribute these effects to redox modulation and inhibition of hepatic NF-κB activation, resulting in diminished ROS and pro-inflammatory cytokine production. This study highlights the importance of controlling oxidative stress and secondary inflammation in obesity-mediated insulin resistance and T2D. Our data confirm the role of NF-κB-mediated inflammation in the development of T2D, and demonstrate the efficacy of MnP in preventing the progression to disease by specifically improving liver pathology and hepatic insulin resistance in obesity.
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Affiliation(s)
- Gina M Coudriet
- Department of Surgery, Children's Hospital of Pittsburgh of UPMC, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - Meghan M Delmastro-Greenwood
- Department of Pediatrics, Children's Hospital of Pittsburgh of UPMC, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - Dana M Previte
- Department of Surgery, Children's Hospital of Pittsburgh of UPMC, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - Meghan L Marré
- Department of Surgery, Children's Hospital of Pittsburgh of UPMC, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - Erin C O'Connor
- Department of Surgery, Children's Hospital of Pittsburgh of UPMC, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - Elizabeth A Novak
- Department of Surgery, Children's Hospital of Pittsburgh of UPMC, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - Garret Vincent
- Department of Surgery, Children's Hospital of Pittsburgh of UPMC, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - Kevin P Mollen
- Department of Surgery, Children's Hospital of Pittsburgh of UPMC, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - Sojin Lee
- Department of Pediatrics, Children's Hospital of Pittsburgh of UPMC, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - H Henry Dong
- Department of Pediatrics, Children's Hospital of Pittsburgh of UPMC, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - Jon D Piganelli
- Department of Surgery, Children's Hospital of Pittsburgh of UPMC, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
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18
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Chen R, Yan J, Liu P, Wang Z, Wang C. Plasminogen activator inhibitor links obesity and thrombotic cerebrovascular diseases: The roles of PAI-1 and obesity on stroke. Metab Brain Dis 2017; 32:667-673. [PMID: 28378106 DOI: 10.1007/s11011-017-0007-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 03/30/2017] [Indexed: 12/18/2022]
Abstract
One of the global socioeconomic phenomena occurred during the last decades is the increased prevalence of obesity, with direct consequence on the risk of developing thrombotic disorders. As the physiological inhibitor of tissue plasminogen activator (tPA) and urokinase plasminogen activator (uPA), plasminogen activator inhibitor-1 (PAI-1) is well known for its role in fibrinolysis. More and more evidences have shown that PAI-1 involves in physiopathologic mechanisms of many diseases and metabolic disorder. Increased serum level of PAI-1 has been observed in obesity and it also contributes to the development of adipose tissue and then has effects on obesity. Meantime, obesity affects also the PAI-1 levels. These evidences indicate the complicated interaction between PAI-1 and obesity. Many clinic studies have confirmed that obesity relates to the stroke outcome although there are many contradictory results. Simultaneously, correlation is found between plasma PAI-1 and thrombotic cerebrovascular diseases. This article reviews contemporary knowledge regarding the complex interplay of obesity, PAI-1 and stroke.
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Affiliation(s)
- Rui Chen
- Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, 212001, China
| | - Jinchuan Yan
- Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, 212001, China.
| | - Peijing Liu
- Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, 212001, China
| | - Zhongqun Wang
- Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, 212001, China
| | - Cuiping Wang
- Department of Cardiology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, 212001, China
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19
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Elkhidir HS, Richards JB, Cromar KR, Bell CS, Price RE, Atkins CL, Spencer CY, Malik F, Alexander AL, Cockerill KJ, Haque IU, Johnston RA. Plasminogen activator inhibitor-1 does not contribute to the pulmonary pathology induced by acute exposure to ozone. Physiol Rep 2016; 4:4/18/e12983. [PMID: 27670409 PMCID: PMC5037925 DOI: 10.14814/phy2.12983] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 08/31/2016] [Indexed: 11/24/2022] Open
Abstract
Expression of plasminogen activator inhibitor (PAI)-1, the major physiological inhibitor of fibrinolysis, is increased in the lung following inhalation of ozone (O3), a gaseous air pollutant. PAI-1 regulates expression of interleukin (IL)-6, keratinocyte chemoattractant (KC), and macrophage inflammatory protein (MIP)-2, which are cytokines that promote lung injury, pulmonary inflammation, and/or airway hyperresponsiveness following acute exposure to O3 Given these observations, we hypothesized that PAI-1 contributes to the severity of the aforementioned sequelae by regulating expression of IL-6, KC, and MIP-2 following acute exposure to O3 To test our hypothesis, wild-type mice and mice genetically deficient in PAI-1 (PAI-1-deficient mice) were acutely exposed to either filtered room air or O3 (2 ppm) for 3 h. Four and/or twenty-four hours following cessation of exposure, indices of lung injury [bronchoalveolar lavage fluid (BALF) protein and epithelial cells], pulmonary inflammation (BALF IL-6, KC, MIP-2, macrophages, and neutrophils), and airway responsiveness to aerosolized acetyl-β-methylcholine chloride (respiratory system resistance) were measured in wild-type and PAI-1-deficient mice. O3 significantly increased indices of lung injury, pulmonary inflammation, and airway responsiveness in wild-type and PAI-1-deficient mice. With the exception of MIP-2, which was significantly lower in PAI-1-deficient as compared to wild-type mice 24 h following cessation of exposure to O3, no other genotype-related differences occurred subsequent to O3 exposure. Thus, following acute exposure to O3, PAI-1 neither regulates pulmonary expression of IL-6 and KC nor functionally contributes to any of the pulmonary pathological sequelae that arise from the noxious effects of inhaled O3.
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Affiliation(s)
- Hamza S Elkhidir
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Jeremy B Richards
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, College of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Kevin R Cromar
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York
| | - Cynthia S Bell
- Division of Nephrology, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Roger E Price
- Comparative Pathology Laboratory, Center for Comparative Medicine, Baylor College of Medicine, Houston, Texas
| | - Constance L Atkins
- Division of Pulmonary Medicine, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Chantal Y Spencer
- Section of Pediatric Pulmonology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Farhan Malik
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Amy L Alexander
- Pediatric Research Center, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Katherine J Cockerill
- Pediatric Research Center, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Ikram U Haque
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Richard A Johnston
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas Pediatric Research Center, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas Department of Integrative Biology and Pharmacology, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
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20
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Barnard SA, Pieters M, De Lange Z. The contribution of different adipose tissue depots to plasma plasminogen activator inhibitor-1 (PAI-1) levels. Blood Rev 2016; 30:421-429. [PMID: 27233154 DOI: 10.1016/j.blre.2016.05.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 04/15/2016] [Accepted: 05/13/2016] [Indexed: 12/31/2022]
Abstract
Increased plasma plasminogen activator inhibitor-1 (PAI-1) level is considered a mechanistic pathway through which obesity contributes to increased cardiovascular disease risk. Abdominal adipose tissue specifically, is a major PAI-1 source with visceral adipose tissue (VAT), an ectopic fat depot, generally considered to produce more PAI-1 than subcutaneous adipose tissue. However, this does not necessarily lead to increased plasma PAI-1 levels. This review provides an overview of studies investigating the association between body fat distribution and plasma PAI-1 levels. It discusses factors that influence this relationship and also considers the contribution of other tissue to plasma PAI-1 levels, placing the relative contribution of adipose tissue into perspective. In conclusion, the relationship between VAT and plasma PAI-1 levels is not fixed but can be modulated by a number of factors such as the size of the subcutaneous adipose tissue depot, ethnicity, possibly genetics and other obesity-related metabolic abnormalities.
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Affiliation(s)
- Sunelle A Barnard
- Centre of Excellence for Nutrition, North-West University, Potchefstroom, South Africa.
| | - Marlien Pieters
- Centre of Excellence for Nutrition, North-West University, Potchefstroom, South Africa.
| | - Zelda De Lange
- Centre of Excellence for Nutrition, North-West University, Potchefstroom, South Africa.
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21
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Blood coagulation and metabolic profiles in middle-aged male and female ob/ob mice. Blood Coagul Fibrinolysis 2016; 26:522-6. [PMID: 25692523 DOI: 10.1097/mbc.0000000000000267] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Obese and diabetic states in humans are associated with an increased incidence of thrombotic diseases caused by various coagulation abnormalities. Genetically obese ob/ob mice produce metabolic abnormalities similar to those associated with type 2 diabetes. However, little is known about their coagulation features or sex differences. The present study aimed to determine the effects of obese and diabetic complications on blood coagulation and vascular diseases by exploring correlations between blood coagulation and metabolic profiles in middle-aged male and female ob/ob mice. Plasma levels of plasminogen activator inhibitor 1 (PAI-1) were significantly increased, whereas those that of platelet factor-4 (PF-4) was slightly, but significantly increased in male and female ob/ob mice compared with lean counterparts. Prothrombin time (PT) was significantly shortened in female ob/ob mice and activated partial thrombin time (APTT) significantly differed between male and female ob/ob mice. Plasma levels of antithrombin (AT) were significantly increased in male and female ob/ob mice. None of the other coagulation and fibrinolytic factors examined significantly differed between ob/ob mice and lean counterparts. On the contrary, factors such as body weight and cholesterol levels significantly differed between ob/ob and lean mice, whereas glucose, fructosamine and insulin levels significantly differed only in one sex of each strain. These results provided fundamental information about blood coagulation and metabolic features for exploring the function of altered blood coagulation states in ob/ob mice.
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22
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Sepúlveda C, Palomo I, Fuentes E. Primary and secondary haemostasis changes related to aging. Mech Ageing Dev 2015; 150:46-54. [PMID: 26296601 DOI: 10.1016/j.mad.2015.08.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 08/02/2015] [Accepted: 08/11/2015] [Indexed: 12/17/2022]
Abstract
Life expectancy has increased in many countries as a result the world's population is aging. The projections indicate that the proportion of the elderly in a few decades will increase significantly. Aging carries with it a series of physiological changes; one of them is an imbalance in the hemostatic system. Thus the levels or activity of various proteins involved, such as most coagulation factors, natural anticoagulants and the fibrinolytic system are altered so that the hemostatic balance leans toward thrombosis. Also, platelet activity suggests a state of abnormal activation (P-selectin, beta thromboglobulin and platelet factor). In this review we will systematically examine the alterations in the hemostatic components that occur during aging. Therefore, understanding these hemostatic changes could contribute to developing strategies for the proper management of health in old age.
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Affiliation(s)
- Cesar Sepúlveda
- Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Interdisciplinary Excellence Research Program on Healthy Aging (PIEI-ES), Universidad de Talca, Talca, Chile
| | - Iván Palomo
- Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Interdisciplinary Excellence Research Program on Healthy Aging (PIEI-ES), Universidad de Talca, Talca, Chile; Centro de Estudios en Alimentos Procesados (CEAP), CONICYT- Regional, Gore Maule R09I2001, Chile.
| | - Eduardo Fuentes
- Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Interdisciplinary Excellence Research Program on Healthy Aging (PIEI-ES), Universidad de Talca, Talca, Chile; Centro de Estudios en Alimentos Procesados (CEAP), CONICYT- Regional, Gore Maule R09I2001, Chile.
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23
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de Oliveira EM, Visniauskas B, Sandri S, Migliorini S, Andersen ML, Tufik S, Fock RA, Chagas JR, Campa A. Late effects of sleep restriction: Potentiating weight gain and insulin resistance arising from a high-fat diet in mice. Obesity (Silver Spring) 2015; 23:391-8. [PMID: 25557274 DOI: 10.1002/oby.20970] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 10/24/2014] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Epidemiological studies show the association of sleep restriction (SR) with obesity and insulin resistance. Experimental studies are limited to the concurrent or short-term effects of SR. Here, we examined the late effects of SR regarding weight gain and metabolic alterations induced by a high-fat diet (HFD). METHODS C57BL/6 mice were subjected to a multiple platform method of SR for 15 days, 21 h daily, followed by 6 weeks of a 30% HFD. RESULTS Just after SR, serum insulin and resistin concentrations were increased and glycerol content decreased. In addition, resistin, TNF-α, and IL-6 mRNA expression were notably increased in epididymal fat. At the end of the HFD period, mice previously submitted to SR gained more weight (32.3 ± 1.0 vs. 29.4 ± 0.7 g) with increased subcutaneous fat mass, had increments in the expression of the adipogenic genes PPARγ, C/EBPα, and C/EBPβ, and had macrophage infiltration in the epididymal adipose tissue. Furthermore, enhanced glucose tolerance and insulin resistance were also observed. CONCLUSIONS The consequences of SR may last for a long period, characterizing SR as a predisposing factor for weight gain and insulin resistance. Metabolic changes during SR seem to prime adipose tissue, aggravating the harmful effects of diet-induced obesity.
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Affiliation(s)
- Edson Mendes de Oliveira
- Departamento de Análises Clínicas e Toxicológicas, Universidade de São Paulo, São Paulo, São Paulo, Brazil
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24
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Ahmed MS, Shoker A. Vitamin D Metabolites; Protective versus Toxic Properties: Molecular and Cellular Perspectives. ACTA ACUST UNITED AC 2014. [DOI: 10.4081/nr.2010.e5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Vitamin D plays an essential role in bone metabolism. The discovery that the vitamin D receptor (VDR), a member of the nuclear receptor superfamily, is expressed in most tissues led researchers to investigate other biological actions of vitamin D. These effects were found to include anti-inflammatory effects and anti-atherogenesis, decreased renin activity and biosynthesis, induction of cell differentiation, inhibition of cell growth, and immunomodulation. In spite of the plethora of evidence on the protective effects of vitamin D, the reports on its intoxication still are considerably few. Therefore, in this review we aim to summarize the molecular and cellular bases of the protect-ive and toxic vitamin D actions that are mediated mostly by VDR. This review will also shed light on vitamin D metabolites other than the active metabolite calcitriol and particularly 25-hydroxy vitamin D (25(OH)D), putting emphasis on its magnifying role in vitamin D intoxication. One of the important themes we discuss is defining serum levels of beneficial or toxic effects of other exogenous vitamin D administration and its impact on 25(OH)D serum levels in animals and human subjects.
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Affiliation(s)
- Mohamed S. Ahmed
- Department of Medicine, Royal University Hospital, University of Saskatchewan, Saskatoon, SK, Canada
| | - Ahmed Shoker
- Department of Medicine, Royal University Hospital, University of Saskatchewan, Saskatoon, SK, Canada
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25
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Abstract
PURPOSE OF REVIEW Obesity has become a worldwide epidemic that is driving increased morbidity and mortality from thrombotic disorders such as myocardial infarction, stroke, and venous thromboembolism. Effective prevention and treatment of thrombosis in obese patients is limited by an incomplete understanding of the underlying prothrombotic mechanisms and by uncertainties about risks, benefits, and dosing of anticoagulant drugs in this patient population. RECENT FINDINGS This review summarizes our current understanding of established and emerging mechanisms contributing to the obesity-induced prothrombotic state. The mechanistic impact of chronic inflammation and impaired fibrinolysis in mediating obesity-associated thrombosis is highlighted. Recent data demonstrating the aberrant expression of adipokines and microRNAs, which appear to function as key modulators of proinflammatory and prothrombotic pathways in obesity, are also reviewed. Finally, some challenges and new approaches to the prevention and management of thrombotic disorders in obese and overweight patients are discussed. SUMMARY Obesity-driven chronic inflammation and impaired fibrinolysis appear to be major effector mechanisms of thrombosis in obesity. The proinflammatory and hypofibrinolytic effects of obesity may be exacerbated by dysregulated expression and secretion of adipokines and microRNAs, which further increase the risk of thrombosis and suggest new potential targets for therapy.
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Jansen HJ, Vervoort GM, van der Graaf M, Stienstra R, Tack CJ. Liver fat content is linked to inflammatory changes in subcutaneous adipose tissue in type 2 diabetes patients. Clin Endocrinol (Oxf) 2013; 79:661-6. [PMID: 23167778 DOI: 10.1111/cen.12105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 10/28/2012] [Accepted: 11/11/2012] [Indexed: 12/14/2022]
Abstract
BACKGROUND Patients with type 2 diabetes mellitus (T2DM) are typically overweight and have an increased liver fat content (LFAT). High LFAT may be explained by an increased efflux of free fatty acids from the adipose tissue, which is partly instigated by inflammatory changes. This would imply an association between inflammatory features of the adipose tissue and liver fat content. OBJECTIVE To analyse associations between inflammatory features of the adipose tissue and liver fat content. DESIGN A cross-sectional study. PATIENTS Twenty-seven obese patients with insulin-treated T2DM were studied. MEASUREMENTS LFAT content was measured by proton magnetic resonance spectroscopy. A subcutaneous (sc) fat biopsy was obtained to determine morphology and protein levels within adipose tissue. In addition to fat cell size, the percentage of macrophages and the presence of crown-like structures (CLSs) within sc fat were assessed by CD68-immunohistochemical staining. RESULTS Mean LFAT percentage was 11·1 ± 1·7% (range: 0·75-32·9%); 63% of the patients were diagnosed with an elevated LFAT (upper range of normal ≤5·5%). Whereas adipocyte size did not correlate with LFAT, 3 of 4 subjects with CLSs in sc fat had elevated LFAT and the percentage of macrophages present in sc adipose tissue was positively associated with LFAT. Protein concentrations of adiponectin within adipose tissue negatively correlated with LFAT. Adipose tissue protein levels of the key inflammatory adipokine plasminogen activator inhibitor-1 (PAI-1) were positively associated with LFAT. CONCLUSIONS Several pro-inflammatory changes in sc adipose tissue associate with increased LFAT content in obese insulin-treated patients with T2DM. These findings suggest that inflammatory changes at the level of the adipose tissue may drive liver fat accumulation.
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Affiliation(s)
- Henry J Jansen
- Department of Internal Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
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Das SK, Patel VB, Oudit GY. Beneficial effects of grape resveratrol on serum adiponectin and inflammation: clinical trial in patients with stable coronary artery disease: editorial to: "Grape resveratrol increases serum adiponectin and downregulates inflammatory genes in peripheral blood mononuclear cells: a triple-blind, placebo-controlled, one-year clinical trial in patients with stable coronary artery disease" by J. Tomé-Carneiro et al. Cardiovasc Drugs Ther 2013; 27:1-4. [PMID: 23292168 DOI: 10.1007/s10557-012-6434-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Resveratrol suppresses PAI-1 gene expression in a human in vitro model of inflamed adipose tissue. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:793525. [PMID: 23819014 PMCID: PMC3684090 DOI: 10.1155/2013/793525] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 05/07/2013] [Accepted: 05/08/2013] [Indexed: 12/13/2022]
Abstract
Increased plasminogen activator inhibitor-1 (PAI-1) levels are associated with a number of pathophysiological complications; among them is obesity. Resveratrol was proposed to improve obesity-related health problems, but the effect of resveratrol on PAI-1 gene expression in obesity is not completely understood. In this study, we used SGBS adipocytes and a model of human adipose tissue inflammation to examine the effects of resveratrol on the production of PAI-1. Treatment of SGBS adipocytes with resveratrol reduced PAI-1 mRNA and protein in a time- and concentration-dependent manner. Further experiments showed that obesity-associated inflammatory conditions lead to the upregulation of PAI-1 gene expression which was antagonized by resveratrol. Although signaling via PI3K, Sirt1, AMPK, ROS, and Nrf2 appeared to play a significant role in the modulation of PAI-1 gene expression under noninflammatory conditions, those signaling components were not involved in mediating the resveratrol effects on PAI-1 production under inflammatory conditions. Instead, we demonstrate that the resveratrol effects on PAI-1 induction under inflammatory conditions were mediated via inhibition of the NF κ B pathway. Together, resveratrol can act as NF κ B inhibitor in adipocytes and thus the subsequently reduced PAI-1 expression in inflamed adipose tissue might provide a new insight towards novel treatment options of obesity.
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Fortenberry YM. Plasminogen activator inhibitor-1 inhibitors: a patent review (2006-present). Expert Opin Ther Pat 2013; 23:801-15. [PMID: 23521527 DOI: 10.1517/13543776.2013.782393] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Plasminogen activator inhibitor-1 (PAI-1), the serine protease inhibitor (serpin), binds to and inhibits the plasminogen activators-tissue-type plasminogen activator (tPA) and the urokinase-type plasminogen activator (uPA). This results in both a decrease in plasmin production and a decrease in the dissolution of fibrin clots. Elevated levels of PAI-1 are correlated with an increased risk for cardiovascular disease and have been linked to obesity and metabolic syndrome. Consequently, the pharmacological suppression of PAI-1 might prevent or treat vascular disease. AREAS COVERED This article provides an overview of the patenting activity on PAI-1 inhibitors. Patents filed by pharmaceutical companies or individual research groups are described, and the biological and biochemical evaluation of the inhibitors, including in vitro and in vivo studies, is discussed. An overview of patents pertaining to using these inhibitors for treating various diseases is also included. EXPERT OPINION Although there is still no PAI-1 inhibitor being evaluated in a clinical setting or approved for human therapy, research in this field has progressed, and promising new compounds have been designed. Most research has focused on improving the pharmacological profile of these compounds, which will hopefully allow them to proceed to clinical studies. Despite the need for further testing and research, the potential use of PAI-1 inhibitors for treating cardiovascular disease appears quite promising.
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Affiliation(s)
- Yolanda M Fortenberry
- Johns Hopkins University School of Medicine, Division of Hematology/Department of Pediatrics, 720 Rutland Avenue Ross 1120, Baltimore, MD 21205, USA.
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Associations between plasma PAI-1 concentrations and its expressions in various organs in obese model mice. Thromb Res 2012; 130:e301-4. [DOI: 10.1016/j.thromres.2012.08.297] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 07/23/2012] [Accepted: 08/14/2012] [Indexed: 11/20/2022]
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Abstract
1. Obesity is a major risk factor for cardiovascular disease. An increased body mass index (BMI) is associated with venous thromboembolism, myocardial infarction, stroke and stent thrombosis after percutaneous interventions. Studies in mouse models of obesity and induced arterial or venous thrombosis have provided insights into the mechanisms involved. 2. In addition to elevated circulating levels of fibrinogen, factor VII and plasminogen activator inhibitor (PAI)-1, changes in platelet biology and function may underlie the increased (athero) thrombotic risk in obesity. These include elevated platelet counts, an increase in mean platelet volume, an increased platelet aggregatory response to agonists and a reversible resistance to the anti-aggregatory effects of nitric oxide and prostacyclin I(2) . 3. Specific adipokines mediate the prothrombotic state in obesity. Of these, leptin enhances both arterial and venous thrombosis by promoting platelet adhesion, activation and aggregation. Leptin also induces tissue factor expression by human neutrophils and other cells. C-Reactive protein enhances the formation of monocyte-platelet aggregates and also promotes P-selectin expression and platelet adhesion to endothelial cells. Further, the adipose tissue is a significant source of tissue factor and PAI-1. Conversely, the circulating levels of adiponectin, a hormone that exerts vasculoprotective, anti-atherosclerotic and antithrombotic effects, are reduced in obese individuals. 4. A better understanding of the interactions of the adipose tissue with circulating and vascular cells and the dissection of the mechanisms linking adipokines to arterial and venous thrombosis may identify obese individuals at particularly high cardiovascular risk and indicate promising vasculoprotective and therapeutic targets.
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Affiliation(s)
- Katrin Schäfer
- Department of Cardiology and Pulmonary Medicine, University Medical Center Goettingen, Goettingen, Germany
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Morris PJ, Packianathan CI, Van Blerk CJ, Finer N. Moderate Exercise and Fibrinolytic Potential in Obese Sedentary Men with Metabolic Syndrome. ACTA ACUST UNITED AC 2012; 11:1333-8. [PMID: 14627753 DOI: 10.1038/oby.2003.180] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To investigate the impact of 30-minute walking exercise at 70% VO2max on tissue plasminogen activator (t-PA) Ag and plasminogen activator inhibitor type 1 (PAI-1) Ag in obese sedentary males. RESEARCH METHODS AND PROCEDURES A controlled observational study of the effect of a 30-minute acute exercise bout at 70% VO2max on plasma t-PA antigen and PAI-1 antigen in 10 obese sedentary males matched for age, ethnic origin, and smoking status with 10 nonobese sedentary male controls. RESULTS The obese group remained hypofibrinolytic compared with the nonobese group at all time-points before, during, and after exercise. t-PA increased in both groups with exercise before returning to baseline values 30 minutes after exercise. PAI-1 did not significantly change in either group with exercise but rose significantly 30 minutes after exercise in the obese group. DISCUSSION The reduction in fibrinolytic potential in the obese group represents an increase in acute thrombotic risk and could account for the increased incidence of exercise-associated myocardial infarction observed in sedentary obese groups.
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Affiliation(s)
- Penelope J Morris
- Centre for Obesity Research, Luton & Dunstable Hospital NHS Trust, Lewsey Road, Luton, Beds LU4 0DZ, United Kingdom.
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Kim KJ, Lee BY. Fucoidan from the sporophyll of Undaria pinnatifida suppresses adipocyte differentiation by inhibition of inflammation-related cytokines in 3T3-L1 cells. Nutr Res 2012; 32:439-47. [PMID: 22749180 DOI: 10.1016/j.nutres.2012.04.003] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Revised: 02/18/2012] [Accepted: 04/16/2012] [Indexed: 01/22/2023]
Abstract
Obesity is a metabolic disorder, associated with cardiovascular disease and type 2 diabetes mellitus. Recent studies suggest that seaweed extracts are a significant source of bioactive compounds that are similar to dietary phytochemicals. Fucoidan, which is extracted from brown seaweeds, has a number of physiological functions. However, it is still unclear whether fucoidan would be beneficial in adipogenesis. In this study, we hypothesized that fucoidan extracted from the sporophyll of U pinnatifida exerts anti-obesity effects via inhibition of inflammatory-related cytokines. Thus, to test our hypothesis, we determined the obesity-specific therapeutic action of fucoidan in 3T3-L1 adipocytes. Herein, we showed that proliferator-activated receptor γ, CCAAR/enhancer-binding protein α, and adipocyte protein 2 were significantly suppressed in the presence of fucoidan, which decreased expression of the inflammation-related genes during adipogenesis in 3T3-L1 adipocytes. Moreover, fucoidan also reduced the accumulation of lipids and reactive oxygen species production in adipocytes. In conclusion, these results demonstrate that fucoidan from the sporophyll of U pinnatifida suppresses adipogenesis through the inhibition of major markers and inflammation-related cytokines in adipocytes. Hence, these findings indicate that fucoidan may afford some potential to control or reduce obesity.
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Affiliation(s)
- Kui-Jin Kim
- Department of Biomedical Science, CHA University, Kyonggi, 463-836, Republic of Korea
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Abstract
Fibrosis is defined as a fibroproliferative or abnormal fibroblast activation-related disease. Deregulation of wound healing leads to hyperactivation of fibroblasts and excessive accumulation of extracellular matrix (ECM) proteins in the wound area, the pathological manifestation of fibrosis. The accumulation of excessive levels of collagen in the ECM depends on two factors: an increased rate of collagen synthesis and or decreased rate of collagen degradation by cellular proteolytic activities. The urokinase/tissue type plasminogen activator (uPA/tPA) and plasmin play significant roles in the cellular proteolytic degradation of ECM proteins and the maintenance of tissue homeostasis. The activities of uPA/tPA/plasmin and plasmin-dependent MMPs rely mostly on the activity of a potent inhibitor of uPA/tPA, plasminogen activator inhibitor-1 (PAI-1). Under normal physiologic conditions, PAI-1 controls the activities of uPA/tPA/plasmin/MMP proteolytic activities and thus maintains the tissue homeostasis. During wound healing, elevated levels of PAI-1 inhibit uPA/tPA/plasmin and plasmin-dependent MMP activities, and, thus, help expedite wound healing. In contrast to this scenario, under pathologic conditions, excessive PAI-1 contributes to excessive accumulation of collagen and other ECM protein in the wound area, and thus preserves scarring. While the level of PAI-1 is significantly elevated in fibrotic tissues, lack of PAI-1 protects different organs from fibrosis in response to injury-related profibrotic signals. Thus, PAI-1 is implicated in the pathology of fibrosis in different organs including the heart, lung, kidney, liver, and skin. Paradoxically, PAI-1 deficiency promotes spontaneous cardiac-selective fibrosis. In this review, we discuss the significance of PAI-1 in the pathogenesis of fibrosis in multiple organs.
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Affiliation(s)
- Asish K Ghosh
- Feinberg Cardiovascular Research Institute, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA.
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Błachnio-Zabielska AU, Pułka M, Baranowski M, Nikołajuk A, Zabielski P, Górska M, Górski J. Ceramide metabolism is affected by obesity and diabetes in human adipose tissue. J Cell Physiol 2012; 227:550-7. [PMID: 21437908 DOI: 10.1002/jcp.22745] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Ceramide is involved in development of insulin resistance. However, there are no data on ceramide metabolism in human adipose tissue. The aim of our study was to examine sphingolipid metabolism in fat tissue from obese nondiabetic (n = 11), obese diabetic (n = 11), and lean nondiabetic (n = 8) subjects. The content of ceramide (Cer), dihydroceramide (dhCer), sphingosine (SPH), sphinganine (SPA), sphingosine-1-phosphate (S1P; pmol/mg of protein), the expression (mRNA) and activity of key enzymes responsible for Cer metabolism: serine palmitoyltransferase (SPT), neutral and acidic sphingomyelinase (nSMase and aSMase, respectively), and neutral and acidic ceramidase (nCDase and aCDase, respectively) were examined in human adipose tissue. The contents of SPA and Cer were significantly lower whereas the content of dhCer was higher in both obese groups than the respective values in the lean subjects. The expression of examined enzymes was elevated in both obese groups. The SPT and CDases activity increased whereas aSMase activity deceased in both obese groups. We have found correlation between adipose tissue Cer content and plasma adiponectin concentration (r = 0.69, P < 0.001) and negative correlation between total Cer content and HOMA-IR index (homeostasis model of insulin resistance) (r = -0.67, P < 0.001). We have found that both obesity and diabetes affected pathways of sphingolipid metabolism in the adipose tissue.
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Jin W, Olson EN, Moore SS, Basarab JA, Basu U, Guan LL. Transcriptome analysis of subcutaneous adipose tissues in beef cattle using 3′ digital gene expression-tag profiling1. J Anim Sci 2012; 90:171-83. [DOI: 10.2527/jas.2011-4229] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- W. Jin
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
| | | | - S. S. Moore
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
| | - J. A. Basarab
- Alberta Agriculture and Rural Development, Lacombe Research Centre, Lacombe, Alberta T4L1W1, Canada
| | - U. Basu
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
| | - L. L. Guan
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
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Huang H, Kasumov T, Gatmaitan P, Heneghan HM, Kashyap SR, Schauer PR, Brethauer SA, Kirwan JP. Gastric bypass surgery reduces plasma ceramide subspecies and improves insulin sensitivity in severely obese patients. Obesity (Silver Spring) 2011; 19:2235-40. [PMID: 21546935 PMCID: PMC3809956 DOI: 10.1038/oby.2011.107] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Bariatric surgery is associated with near immediate remission of type 2 diabetes and hyperlipidemia. The mechanisms underlying restoration of normal glucose tolerance postoperatively are poorly understood. Herein, we examined the effect of Roux-en-Y gastric bypass surgery (RYGB) on weight loss, insulin sensitivity, plasma ceramides, proinflammatory markers, and cardiovascular risk factors before and at 3 and 6 months after surgery. Thirteen patients (10 female; age 48.5 ± 2.7 years; BMI, 47.4 ± 1.5 kg/m(2)) were included in the study, all of whom had undergone laparoscopic RYGB surgery. Insulin sensitivity, inflammatory mediators and fasting lipid profiles were measured at baseline, 3 and 6 months postoperatively, using enzymatic analysis. Plasma ceramide subspecies (C14:0, C16:0, C18:0, C18:1, C20:0, C24:0, and C24:1) were quantified using electrospray ionization tandem mass spectrometry after separation with HPLC. At 3 months postsurgery, body weight was reduced by 25%, fasting total cholesterol, triglycerides, low-density lipoproteins, and free fatty acids were decreased, and insulin sensitivity was increased compared to presurgery values. These changes were all sustained at 6 months. In addition, total plasma ceramide levels decreased significantly postoperatively (9.3 ± 0.5 nmol/ml at baseline vs. 7.6 ± 0.4 at 3 months, and 7.3 ± 0.3 at 6 months, P < 0.05). At 6 months, the improvement in insulin sensitivity correlated with the change in total ceramide levels (r = -0.68, P = 0.02), and with plasma tumor necrosis factor-α (TNF-α) (r = -0.62, P = 0.04). We conclude that there is a potential role for ceramide lipids as mediators of the proinflammatory state and improved insulin sensitivity after gastric bypass surgery.
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Affiliation(s)
- Hazel Huang
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
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Ikeda Y, Hama S, Kajimoto K, Okuno T, Tsuchiya H, Kogure K. Quantitative comparison of adipocytokine gene expression during adipocyte maturation in non-obese and obese rats. Biol Pharm Bull 2011; 34:865-70. [PMID: 21628885 DOI: 10.1248/bpb.34.865] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Adipocytokines secreted from adipocytes have been extensively analyzed due to their role as key factors in various complications of obesity, including arterial sclerosis, liver steatosis, insulin resistance, and diabetes. Several in vivo and in vitro studies have suggested that adipocyte maturation is related to fluctuations in adipocytokine secretion. However, the relationship between adipocyte maturation and adipocytokine levels has not been fully elucidated. Therefore, we sought to clarify the link between adipocytokine gene expression and adipocyte maturation through systematic analysis. We quantified mRNA for six adipocytokine genes: adiponectin, resistin, leptin, plasminogen activator inhibitor 1 (PAI-1), heparin-binding epidermal growth factor (EGF)-like growth factor (HB-EGF), and visfatin, in adipose tissue, in primary cultured adipocytes obtained from an obese Zucker rat, and in the preadipocyte cell line 3T3-L1. Moreover, to elucidate the role of adipocytokines in adipocyte maturation, adipocytokine expression levels were analyzed during maturation. Although fluctuations in adipocytokine gene expression were heterogeneous, gene expression was highly similar during maturation of primary cultured adipocytes from obese and non-obese rats, suggesting that the maturation process is independent from processes that lead to obesity. Moreover, the expression patterns of adiponectin, resistin and leptin mRNA in 3T3-L1 cells were highly similar to those in primary cultured adipocytes, indicating that these adipocytokines could be common maturation markers for primary cultured adipocytes obtained from obese and non-obese rats, and for preadipocyte cell lines.
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Affiliation(s)
- Yoshito Ikeda
- Department of Biophysical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
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Salvator H, Devillier P, Rivaud E, Catherinot E, Honderlick P, Couderc LJ. [Obesity, poor prognostic factor in pandemic influenza A (H1N1) 2009: the role of adipokines in the modulation of respiratory defenses]. REVUE DE PNEUMOLOGIE CLINIQUE 2011; 67:244-249. [PMID: 21920285 DOI: 10.1016/j.pneumo.2011.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Accepted: 01/20/2011] [Indexed: 05/31/2023]
Abstract
Pandemic influenza A (H1N1), which occurred during 2009, revealed some unexpected epidemiologic characteristics, notably the high number of obese subjects among the severe cases of influenza. Generally, obesity seems to be associated with a weakness when it comes to respiratory infections. This susceptibility may be the result of a concurrence of mechanical and hormonal factors due to the excess weight. Obesity leads to changes in the ventilatory mechanics and an increase in the metabolic load during exercise. It is associated with immune system changes. Adipokines, cytokines produced by adipocytes, including leptin, play a central role by modulating the activity of all the cells of the immune system. Finally, obesity is associated with an increased risk of thrombosis, which has an adverse effect on the prognosis of infections. All of these observations can explain that obesity has been a risk factor in serious cases of influenza.
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Affiliation(s)
- H Salvator
- Service dePneumologie, Hôpital Foch, 40, rue Worth, 92150 Suresnes, France.
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Xu L, Jiang CQ, Lam TH, Bao B, Cheng KK, Thomas GN. Plasminogen activator inhibitor-1 and HbA1c defined prediabetes: the Guangzhou Biobank Cohort Study-CVD. Clin Endocrinol (Oxf) 2011; 74:528-31. [PMID: 21128994 DOI: 10.1111/j.1365-2265.2010.03948.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To examine the association between plasminogen activator inhibitor-1 (PAI-1) and diabetes status. RESEARCH DESIGN AND METHODS One thousand three hundred and ninety-three older Chinese were randomly selected from the Guangzhou Biobank Cohort Study. Diabetes status was classified as impaired HbA1c (IA1c) level of 5·7-6·4%, impaired fasting glucose (IFG), impaired glucose tolerance (IGT) or diabetes using the American Diabetes Association diagnosis criteria in 2010. RESULTS Compared to the normoglycemic (NG) group, 421 subjects with IA1c, but without diabetes, IFG or IGT, had adverse levels of vascular risk factors, including PAI-1, lipid profile, blood pressure and anthropometry. After adjusting for multiple potential confounders, compared to the NG group, the level of plasma PAI-1 was independently and significantly increased in the IA1c and the IFG/IGT group (mean difference: 32·0 (95% confidence interval: 5·5-58·6) ng/ml and 33·3 (6·3-60·3) ng/ml, respectively; P<0·01). CONCLUSIONS Plasma PAI-1 level was increased in people with haemoglobin A1c (HbA1c) of 5·7-6·4% but without IFG or IGT, and in people with IFG/IGT, suggesting an increased risk for future diabetes and cardiovascular diseases in these groups.
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Affiliation(s)
- Lin Xu
- Department of Community Medicine, School of Public Health, University of Hong Kong, Hong Kong, China
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Zhou Y, Wei Y, Wang L, Wang X, Du X, Sun Z, Dong N, Chen X. Decreased adiponectin and increased inflammation expression in epicardial adipose tissue in coronary artery disease. Cardiovasc Diabetol 2011; 10:2. [PMID: 21226932 PMCID: PMC3032658 DOI: 10.1186/1475-2840-10-2] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Accepted: 01/12/2011] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Disorders of endocrine substances in epicardial adipose tissue are known causes of coronary artery disease (CAD). Adiponectin is associated with cardiovascular disease. However, expression of adiponectin in epicardial adipose tissue and its function in CAD pathogenesis is unclear. This study investigates adiponectin expression in epicardial adipose tissue in CAD patients. METHODS Vessels or adipose tissue samples collected from CAD patients and non-CAD controls were examined after immunochemical staining. Adiponectin, cytokines of interleukin-6 (IL-6) and necrosis factor-α (TNF-α) and toll-like receptor 4 (TLR4) expression level in adipose tissue were measured using real-time quantitative RT-PCR. Adiponectin concentrations in peripheral and coronary sinus vein plasma were measured with enzyme-linked immunosorbent assay. Peripheral vein plasma biochemistries were performed with routine laboratory techniques. Monocytes were collected from blood using lymphocyte separation medium. Expression level of cytokines and transcription factor NF-κB were measured to learn the effect of adiponectin on stearic acid-stimulated monocytes. Percentage of TLR4 positive monocytes was analyzed using flow cytometry. RESULTS Histological examination revealed increased macrophage infiltration into epicardial adipose tissue of CAD patients. Decreased adiponectin displayed by real-time quantitative RT-PCR was associated with enhanced cytokines of IL-6 and TNF-α or TLR4 expression level in epicardial adipose tissue, suggesting decreased circulating adiponectin may be useful as a more sensitive predictor for coronary atherosclerosis than routine laboratory examinations. Adiponectin suppressed secretion of IL-6 and TNF-α in stimulated monocytes and TLR4 was expressed on cell surfaces. CONCLUSIONS Endocrine disorders in epicardial adipose tissue are strongly linked to CAD, and adiponectin has a protective effect by inhibiting macrophage-mediated inflammation.
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Affiliation(s)
- Yuan Zhou
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, Hubei, China
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Adipose tissue and ceramide biosynthesis in the pathogenesis of obesity. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2011; 721:67-86. [PMID: 21910083 DOI: 10.1007/978-1-4614-0650-1_5] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Although obesity is a complex metabolic disorder often associated with insulin resistance, hyperinsulinemia and Type 2 diabetes, as well as with accelerated atherosclerosis, the molecular changes in obesity that promote these disorders are not completely understood. Several mechanisms have been proposed to explain how increased adipose tissue mass affects whole body insulin resistance and cardiovascular risk. One theory is that increased adipose derived inflammatory cytokines induces a chronic inflammatory state that not only increases cardiovascular risk, but also antagonizes insulin signaling and mitochondrial function and thereby impair glucose hemostasis. Another suggests that lipid accumulation in nonadipose tissues not suited for fat storage leads to the buildup of bioactive lipids that inhibit insulin signaling and metabolism. Recent evidence demonstrates that sphingolipid metabolism is dysregulated in obesity and specific sphingolipids may provide a common pathway that link excess nutrients and inflammation to increased metabolic and cardiovascular risk. This chapter will focus primarily on the expression and regulation of adipose and plasma ceramide biosynthesis in obesity and, its potential contribution to the pathogenesis of obesity and the metabolic syndrome.
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Cesari M, Pahor M, Incalzi RA. Plasminogen activator inhibitor-1 (PAI-1): a key factor linking fibrinolysis and age-related subclinical and clinical conditions. Cardiovasc Ther 2010; 28:e72-91. [PMID: 20626406 PMCID: PMC2958211 DOI: 10.1111/j.1755-5922.2010.00171.x] [Citation(s) in RCA: 302] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
INTRODUCTION The close relationship existing between aging and thrombosis has growingly been studied in this last decade. The age-related development of a prothrombotic imbalance in the fibrinolysis homeostasis has been hypothesized as the basis of this increased cardiovascular and cerebrovascular risk. Fibrinolysis is the result of the interactions among multiple plasminogen activators and inhibitors constituting the enzymatic cascade, and ultimately leading to the degradation of fibrin. The plasminogen activator system plays a key role in a wide range of physiological and pathological processes. METHODS Narrative review. RESULTS Plasminogen activator inhibitor-1 (PAI-1) is a member of the superfamily of serine-protease inhibitors (or serpins), and the principal inhibitor of both the tissue-type and the urokinase-type plasminogen activator, the two plasminogen activators able to activate plasminogen. Current evidence describing the central role played by PAI-1 in a number of age-related subclinical (i.e., inflammation, atherosclerosis, insulin resistance) and clinical (i.e., obesity, comorbidities, Werner syndrome) conditions is presented. CONCLUSIONS Despite some controversial and unclear issues, PAI-1 represents an extremely promising marker that may become a biological parameter to be progressively considered in the prognostic evaluation, in the disease monitoring, and as treatment target of age-related conditions in the future.
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Affiliation(s)
- Matteo Cesari
- Area di Geriatria, Università Campus Bio-Medico, Rome, Italy.
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Chou YY, Sheu WHH, Tang YJ, Chen YM, Liao SC, Chuang YW, Lin CS, Chen DY. Plasminogen activator inhibitor type 1 (PAI-1) is a valuable biomarker for predicting the metabolic syndrome (MS) in institutionalized elderly residents in Taiwan. Arch Gerontol Geriatr 2010; 49 Suppl 2:S41-5. [PMID: 20005426 DOI: 10.1016/s0167-4943(09)70012-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Circulating levels of inflammatory and prothrombotic factors are elevated in the metabolic syndrome (MS) and linked with the occurrence of cardiovascular events. The aim of our study was to investigate the relationship between inflammatory and prothrombotic markers and the MS in elderly institutionalized residents. A total of 326 non-diabetic residents of Chuang-Hua Veterans Care Home (age: 79.9+/-4.1 years; 100% males) were enrolled. MS was diagnosed according to the AHA/NHLBI Scientific Statement criteria. Body fat percentage was measured by bioelectrical impedance analysis. Insulin resistance was calculated by homeostasis model assessment for insulin resistance (HOMA-IR). Inflammatory markers, including tumor necrosis factor-a (TNF-alpha), high sensitivity C-reactive protein (hsCRP), and plasminogen activator inhibitor-1 (PAI-1), were determined using ELISA. Elderly residents with the MS had higher systolic and diastolic blood pressures (both p < 0.001) and higher HOMA-IR (p < 0.001), hsCRP (p = 0.008), and PAI-1 levels (p < 0.001) than those without the MS. On multivariate logistic regression analysis, PAI-1 was an independent risk factor for the MS. Of the MS components, elderly residents with higher waist circumferences and higher levels of plasma fasting glucose, and triglyceride (TG), and lower levels of high density lipoprotein (HDL) had higher PAI-1 levels than those without the above components.
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Affiliation(s)
- Yin-Yi Chou
- Center for Geriatrics and Gerontology, Taichung Veterans General Hospital, No. 160, Sec. 3, Chung-Kang Rd., Taichung 40705, Taiwan, R.O.C
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Singh P, Peterson TE, Barber KR, Kuniyoshi FS, Jensen A, Hoffmann M, Shamsuzzaman ASM, Somers VK. Leptin upregulates the expression of plasminogen activator inhibitor-1 in human vascular endothelial cells. Biochem Biophys Res Commun 2010; 392:47-52. [PMID: 20051227 DOI: 10.1016/j.bbrc.2009.12.158] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Accepted: 12/25/2009] [Indexed: 10/20/2022]
Abstract
A prothrombotic state in obesity may be partially responsible for the higher incidence of atherosclerotic complications. However the factors responsible for this prothrombotic state, linked with high levels of plasminogen activator inhibitor-1 (PAI-1), are not fully known. Leptin is elevated in obesity and studies have shown a positive correlation between leptin and PAI-1 levels in human subjects, along with a negative correlation with tissue-type plasminogen activator (tPA). We tested the hypothesis that leptin induces PAI-1 and inhibits tPA expression using human coronary artery endothelial cells (HCAEC) in culture as these cells play an important role in atherosclerosis. We demonstrate that leptin induces the transcription and translation of PAI-1 in HCAEC. The leptin dependent upregulation of PAI-1 mRNA and protein was comparable to insulin-induced PAI-1 expression. We show leptin concentration (0-150 ng/ml) dependent increases in PAI-1 mRNA and protein after 6 and 12h of leptin administration, respectively. Increased intracellular PAI-1 expression correlates with increased PAI-1 activity in conditioned media and inhibition of specific ERK1/2 pathway by treatment with PD98059 (20-40 microM) inhibits leptin dependent PAI-1 expression. However no changes in tPA expression were seen with time or increasing concentrations of leptin. Also leptin treatment did not alter total tPA concentration or tPA activity in conditioned media. In conclusion, our study shows that leptin upregulates the expression of PAI-1 in vascular endothelial cells via activation of ERK1/2 but does not regulate tPA expression. These studies demonstrate a novel mechanism for the prothrombotic role of leptin in development of atherosclerosis.
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Affiliation(s)
- Prachi Singh
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN 55905, USA
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Yamamoto K, Shibayama S, Takeshita K, Kojima T, Takamatsu J. A novel cholesterol absorption inhibitor, ezetimibe, decreases adipose-derived and vascular PAI-1 expression in vivo. Thromb Res 2009; 124:644-5. [DOI: 10.1016/j.thromres.2009.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2009] [Revised: 05/04/2009] [Accepted: 05/14/2009] [Indexed: 10/20/2022]
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Hyland NP, Chambers AP, Keenan CM, Pittman QJ, Sharkey KA. Differential adipokine response in genetically predisposed lean and obese rats during inflammation: a role in modulating experimental colitis? Am J Physiol Gastrointest Liver Physiol 2009; 297:G869-77. [PMID: 20501435 DOI: 10.1152/ajpgi.00164.2009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The relationship between a predisposition to obesity and the development of colitis is not well understood. Our aim was to characterize the adipokine response and the extent of colitis in diet-induced obese (DIO) rats. DIO and control, diet-resistant (DR) animals were administered either saline or trinitrobenzene sulfonic acid (TNBS) to induce colitis. Macroscopic damage scores and myeloperoxidase (MPO) activity were measured to determine the extent of inflammation. Trunk blood was collected for the analysis of plasminogen activator inhibitor-1 (PAI-1) as well as leptin, ghrelin, and adiponectin. Colonic epithelial physiology was assessed using Ussing chambers. DIO rats had a modestly increased circulating PAI-1 before TNBS treatment; however, during colitis, DR animals had more than a fourfold increase in circulating PAI-1 compared with DIO rats. Circulating leptin was higher in DIO rats compared with DR animals, in the inflamed and noninflamed states. These changes in TNBS-induced adipokine profile were accompanied by decreased macroscopic tissue damage score in DIO animals compared with DR tissues. Furthermore, TNBS-treated DR animals lost significantly more weight than DIO rats during active inflammation. Colonic epithelial physiology was comparable between groups, as was MPO activity. The factors contributing to the decreased colonic damage are almost certainly multifold, driven by both genetic and environmental factors, of which adipokines are likely to play a part given the increasing body of evidence for their role in modulating intestinal inflammation.
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Affiliation(s)
- Niall P Hyland
- Snyder Institute of Infection, Immunity and Inflammation, Hotchkiss Brain Institute and Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, T2N 4N1, Canada
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Obesity and breast cancer: the roles of peroxisome proliferator-activated receptor-γ and plasminogen activator inhibitor-1. PPAR Res 2009; 2009:345320. [PMID: 19672469 PMCID: PMC2723729 DOI: 10.1155/2009/345320] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 05/18/2009] [Accepted: 06/10/2009] [Indexed: 01/01/2023] Open
Abstract
Breast cancer is the most prominent cancer among females in the United States. There are a number of risk factors associated with development of breast cancer, including consumption of a high-fat diet and obesity. Plasminogen activator inhibitor-1 (PAI-1) is a cytokine upregulated in obesity whose expression is correlated with a poor prognosis in breast cancer. As a key mediator of adipogenesis and regulator of adipokine production, peroxisome proliferator-activated receptor-γ (PPAR-γ) is involved in PAI-1 expression from adipose tissue. We summarize the current knowledge linking PPAR-γ and PAI-1 expression to high-fat diet and obesity in the risk of breast cancer.
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Barbato A, Iacone R, Tarantino G, Russo O, Sorrentino P, Avallone S, Galletti F, Farinaro E, Della Valle E, Strazzullo P. Relationships of PAI-1 levels to central obesity and liver steatosis in a sample of adult male population in southern Italy. Intern Emerg Med 2009; 4:315-23. [PMID: 19350365 DOI: 10.1007/s11739-009-0240-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2008] [Accepted: 02/20/2009] [Indexed: 12/21/2022]
Abstract
To analyse the relationship of PAI-1 plasma levels to echographically determined liver steatosis and cardiometabolic risk factors in a randomly selected sample of 254 adult male participants of the Olivetti Heart Study. Accounting for age and ongoing pharmacological treatment, PAI-1 levels were directly (P < 0.005) associated with body mass index (BMI), waist circumference (WC), serum triglyceride (TG), total cholesterol, insulin, homeostasis model assessment index, gamma-glutamyl transpeptidase and peritoneal fat. At multiple linear regression (MLR) analysis, measures of adiposity and TG exerted significant and quantitatively similar effects on PAI-1 levels. A progressive rise in PAI-1 level was detected with increasing degree of steatosis. A stepwise MLR model was used to evaluate the relative power of cardiometabolic risk factors and liver steatosis on PAI-1 levels. Adjusting for alcohol intake, BMI, WC and peritoneal fat were alternatively included in the model with other variables found to be significantly associated with plasma PAI-1 level. Liver steatosis, serum TG and various indexes of adiposity each had a significant independent impact on PAI-1 plasma level and explained overall 23% of its variability. Abdominal fat, liver steatosis and serum TG levels were significant and independent determinants of PAI-1 plasma level in an unselected sample of adult male population upon adjustment for age and therapy.
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Affiliation(s)
- Antonio Barbato
- Department of Clinical and Experimental Medicine, Federico II University of Naples Medical School, Via S. Pansini, 5, 80131 Naples, Italy
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Jag UR, Zavadil J, Stanley FM. Insulin acts through FOXO3a to activate transcription of plasminogen activator inhibitor type 1. Mol Endocrinol 2009; 23:1587-602. [PMID: 19608644 DOI: 10.1210/me.2008-0421] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Plasminogen activator inhibitor-1 (PAI-1) is an important regulator of fibrinolysis. PAI-1 levels are elevated in type 2 diabetes, and this elevation correlates with macro- and microvascular complications of diabetes. However, the mechanistic link between insulin and up-regulation of PAI-1 is unclear. Here we demonstrate that overexpression of Forkhead-related transcription factor (Fox)O1, FoxO3a, and FoxC1 augment insulin's ability to activate the PAI-1 promoter. In addition, insulin treatment promotes the phosphorylation of nuclear and cytoplasmic Fox03a and an increase of cytoplasmic Fox03a. In contrast, insulin treatment led to the accumulation of phospho-Fox01 only in the cytoplasm. Furthermore, insulin also increased the ability of chimeric LexA-FoxO1, LexA-FoxO3a, and LexA-FoxC1 proteins to increase the activity of a LexA reporter, suggesting that the effect of insulin on FoxO3a was direct. Using small interfering RNA to specifically deplete each of the Fox transcription factors tested, we demonstrate that only reduction of FoxO3a inhibits insulin-increased PAI-1-Luc expression and PAI-1 mRNA accumulation. Finally, chromatin immunoprecipitation assays confirm the presence of FoxO3a on the PAI-1 promoter. These results suggest that FoxO3a mediates insulin-increased PAI-1 gene expression.
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Affiliation(s)
- Ushma R Jag
- Department of Pharmacology, New York University School of Medicine, New York, New York 10016, USA
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