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Rai U, Senapati D, Arora MK. Insights on the role of anti-inflammatory and immunosuppressive agents in the amelioration of diabetes. Diabetol Int 2023; 14:134-144. [PMID: 37090130 PMCID: PMC10113422 DOI: 10.1007/s13340-022-00607-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 10/30/2022] [Indexed: 11/18/2022]
Abstract
Diabetes is a major health problem worldwide. It is a chronic metabolic disorder that produces overt hyperglycemic condition that occurs either when the pancreas does not produce enough insulin due to excessive destruction of pancreatic β-cells (type 1 diabetes) or due to development of insulin resistance (type 2 diabetes). An autoimmune condition known as type 1 diabetes (T1D) results in the targeted immune death of β-cells that produce insulin. The only available treatment for T1D at the moment is the lifelong use of insulin. Multiple islet autoantibody positivity is used to diagnose T1D. There are four standard autoantibodies observed whose presence shows the development of T1D: antibodies against insulin, glutamic acid decarboxylase (GAD65), zinc T8 transporter (ZnT8), and tyrosine phosphatase-like protein (ICA512). In type 2 diabetes (T2D), an inflammatory response precipitates as a consequence of the immune response to high blood glucose level along with the presence of inflammation mediators produced by macrophages and adipocytes in fat tissue. The slow and chronic inflammatory condition of adipose tissue produces insulin resistance leading to increased stress on pancreatic β-cells to produce more insulin to compensate for the insulin resistance. Thus, this stress condition exacerbates the apoptosis of β-cells leading to insufficient production of insulin, resulting in hyperglycemia which signifies late stage T2D. Therefore, the therapeutic utilization of immunosuppressive agents may be a better alternative over the use of insulin and oral hypoglycemic agents for the treatment of T1D and T2D, respectively. This review enlightens the immune intervention for the prevention and amelioration of T1D and T2D in humans with main focus on the antigen-specific immune suppressive therapy.
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Affiliation(s)
- Uddipak Rai
- School of Pharmaceutical and Population Health Informatics, DIT University, 248009, Dehradun, Uttarakhand India
| | - Dhirodatta Senapati
- School of Pharmaceutical and Population Health Informatics, DIT University, 248009, Dehradun, Uttarakhand India
| | - Mandeep Kumar Arora
- School of Pharmaceutical and Population Health Informatics, DIT University, 248009, Dehradun, Uttarakhand India
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2
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Chen KY, Wu SM, Tseng CH, Lee KY, Lin YH, Liu HY, Chien LN. Combination therapies with thiazolidinediones are associated with a lower risk of acute exacerbations in new-onset COPD patients with advanced diabetic mellitus: a cohort-based case-control study. BMC Pulm Med 2021; 21:141. [PMID: 33926423 PMCID: PMC8086317 DOI: 10.1186/s12890-021-01505-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 04/19/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND The effects of oral antihyperglycaemic drugs (OADs) for type 2 diabetes mellitus (T2DM) on the outcomes of co-existing chronic obstructive pulmonary disease (COPD) patients are not well studied. We examined the association of combinational OADs and the risk of acute exacerbations of COPD (AECOPD) in T2DM patients with co-existing COPD. METHODS A cohort-based case-control study was conducted using data from the National Health Insurance Research Database of Taiwan. Among new-onset COPD-T2DM patients, 65,370 were prescribed metformin and 2nd-line OADs before the date of COPD onset. Each AECOPD case was matched to 4 randomly selected controls according to the propensity score estimated by the patient's baseline characteristics. Conditional logistic regression analysis was performed to estimate the association between AECOPD risk and OAD use. RESULTS Among COPD-T2DM patients, 3355 AECOPD cases and 13,420 matched controls were selected. Of the patients treated with a double combination of oral OADs (n = 12,916), those treated with sulfonylurea (SU) and thiazolidinediones (TZD) had a lower AECOPD risk than the patients who received metformin (MET) and SU, with an adjusted odds ratio (OR) of 0.69 (95% confidence interval [CI] 0.51-0.94, P = 0.02). Of the patients with a triple combination of oral OADs (n = 3859), we found that those treated with MET, SU and TZD had a lower risk of AECOPD (adjusted OR 0.81 (0.68-0.96, P = 0.01) than a combination of MET, SU and α-glucosidase inhibitors (AGIs) regardless of the level of COPD complexity. CONCLUSION Combination therapies with TZD were associated with a reduced risk of AECOPD in advanced T2DM patients with co-existing COPD.
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Affiliation(s)
- Kuan-Yuan Chen
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Sheng-Ming Wu
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
- Division of Pulmonary Medicine, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chien-Hua Tseng
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
- Division of Pulmonary Medicine, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Kang-Yun Lee
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
- Division of Pulmonary Medicine, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yu-Huei Lin
- Post-Baccalaureate Program in Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
| | - Hung-Yi Liu
- Office of Data, Taipei Medical University, No. 250 Wuxing St., Taipei, 11031, Taiwan
| | - Li-Nien Chien
- Office of Data, Taipei Medical University, No. 250 Wuxing St., Taipei, 11031, Taiwan.
- School of Health Care Administration, College of Management, Taipei Medical University, Taipei, Taiwan.
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3
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Xourgia E, Tzouganatou EM, Papazafeiropoulou A, Melidonis A. Anti-inflammatory properties of antidiabetic agents. World J Meta-Anal 2019; 7:129-141. [DOI: 10.13105/wjma.v7.i4.129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/20/2019] [Accepted: 04/23/2019] [Indexed: 02/06/2023] Open
Abstract
The reciprocal relationship between hyperglycemia and inflammation in the setting of diabetes mellitus has been the subject of extensive research. Insulin resistance, the hallmark of diabetic metabolic dysregulation, has been linked to the inflammatory cascade occurring mainly in adipose tissue. The main pathophysiologic processes facilitating the aforementioned interplay, is a phenotype switch of macrophages to the M1 class following gluco- and lipotoxicity and gut microbial remodeling. Given the correlation between inflammation and metabolic abnormalities, the elucidation of the exact mechanisms linking the two along with exploring the possible role of modulation of one in order to alter the other, could open up the possibility of novel therapeutic approaches for diabetes mellitus and its complications. Therefore, the aim of this review is to summarize the growing body of evidence concerning the molecular basis and results of pro-inflammatory processes in diabetic subjects along with the effect of current antidiabetic treatment options on tissue inflammation.
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Affiliation(s)
- Eleni Xourgia
- 1st Department of Internal Medicine and Diabetes Center, Tzaneio General Hospital of Piraeus, Athens 18536, Greece
| | - Eleni-Margarita Tzouganatou
- 1st Department of Internal Medicine and Diabetes Center, Tzaneio General Hospital of Piraeus, Athens 18536, Greece
| | - Athanasia Papazafeiropoulou
- 1st Department of Internal Medicine and Diabetes Center, Tzaneio General Hospital of Piraeus, Athens 18536, Greece
| | - Andreas Melidonis
- 1st Department of Internal Medicine and Diabetes Center, Tzaneio General Hospital of Piraeus, Athens 18536, Greece
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4
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Shinde DN, Trivedi R, Krishna JVS, Giribabu L, Sridhar B, Khursade PS, Prakasham RS. N-Arylation of ferrocenyl 2,4-thiazolidinedione conjugatesviaa copper-catalysed Chan–Lam cross coupling reaction with aryl boronic acids and their optoelectronic properties. NEW J CHEM 2018. [DOI: 10.1039/c8nj01598h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Copper catalysed Chan–LamN-arylation of ferrocenyl 2,4-thiazolidinedione conjugates is described.
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Affiliation(s)
- Dilip Nivrutti Shinde
- Catalysis and Fine Chemicals Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Rajiv Trivedi
- Catalysis and Fine Chemicals Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Jonnadula V. S. Krishna
- Catalysis and Fine Chemicals Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad
- India
| | - L. Giribabu
- Catalysis and Fine Chemicals Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - B. Sridhar
- Centre for X-ray Crystallography
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500007
- India
| | - Parag S. Khursade
- Organic Synthesis and Process Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500007
- India
| | - R. S. Prakasham
- Organic Synthesis and Process Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500007
- India
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5
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Banno A, Reddy AT, Lakshmi SP, Reddy RC. PPARs: Key Regulators of Airway Inflammation and Potential Therapeutic Targets in Asthma. NUCLEAR RECEPTOR RESEARCH 2017; 5. [PMID: 29450204 DOI: 10.11131/2018/101306] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Asthma affects approximately 300 million people worldwide, significantly impacting quality of life and healthcare costs. While current therapies are effective in controlling many patients' symptoms, a large number continue to experience exacerbations or treatment-related adverse effects. Alternative therapies are thus urgently needed. Accumulating evidence has shown that the peroxisome proliferator-activated receptor (PPAR) family of nuclear hormone receptors, comprising PPARα, PPARβ/δ, and PPARγ, is involved in asthma pathogenesis and that ligand-induced activation of these receptors suppresses asthma pathology. PPAR agonists exert their anti-inflammatory effects primarily by suppressing pro-inflammatory mediators and antagonizing the pro-inflammatory functions of various cell types relevant to asthma pathophysiology. Experimental findings strongly support the potential clinical benefits of PPAR agonists in the treatment of asthma. We review current literature, highlighting PPARs' key role in asthma pathogenesis and their agonists' therapeutic potential. With additional research and rigorous clinical studies, PPARs may become attractive therapeutic targets in this disease.
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Affiliation(s)
- Asoka Banno
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Aravind T Reddy
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213.,Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA 15240
| | - Sowmya P Lakshmi
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213.,Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA 15240
| | - Raju C Reddy
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213.,Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA 15240
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6
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Gulliver LSM. Xenobiotics and the Glucocorticoid Receptor. Toxicol Appl Pharmacol 2017; 319:69-79. [DOI: 10.1016/j.taap.2017.02.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 02/03/2017] [Indexed: 11/27/2022]
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7
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Agrawal S, Chanley MA, Westbrook D, Nie X, Kitao T, Guess AJ, Benndorf R, Hidalgo G, Smoyer WE. Pioglitazone Enhances the Beneficial Effects of Glucocorticoids in Experimental Nephrotic Syndrome. Sci Rep 2016; 6:24392. [PMID: 27142691 PMCID: PMC4855145 DOI: 10.1038/srep24392] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 03/21/2016] [Indexed: 12/25/2022] Open
Abstract
Glucocorticoids are the primary therapy for nephrotic syndrome (NS), but have serious side effects and are ineffective in ~20-50% of patients. Thiazolidinediones have recently been suggested to be renoprotective, and to modulate podocyte glucocorticoid-mediated nuclear receptor signaling. We hypothesized that thiazolidinediones could enhance glucocorticoid efficacy in NS. We found that puromycin aminonucleoside-induced proteinuria in rats was significantly reduced by both high-dose glucocorticoids (79%) and pioglitazone (61%), but not low-dose glucocorticoids (25%). Remarkably, pioglitazone + low-dose glucocorticoids also reduced proteinuria (63%) comparably to high-dose glucocorticoids, whereas pioglitazone + high-dose glucocorticoids reduced proteinuria to almost control levels (97%). Molecular analysis revealed that both glucocorticoids and pioglitazone enhanced glomerular synaptopodin and nephrin expression, and reduced COX-2 expression, after injury. Furthermore, the glomerular phosphorylation of glucocorticoid receptor and Akt, but not PPARγ, correlated with treatment-induced reductions in proteinuria. Notably, clinical translation of these findings to a child with refractory NS by the addition of pioglitazone to the treatment correlated with marked reductions in both proteinuria (80%) and overall immunosuppression (64%). These findings together suggest that repurposing pioglitazone could potentially enhance the proteinuria-reducing effects of glucocorticoids during NS treatment.
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Affiliation(s)
- S Agrawal
- Center for Clinical and Translational Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - M A Chanley
- Center for Clinical and Translational Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - D Westbrook
- James and Connie Maynard Children's Hospital, Greenville, NC, USA
| | - X Nie
- Center for Clinical and Translational Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - T Kitao
- Center for Clinical and Translational Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - A J Guess
- Center for Clinical and Translational Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - R Benndorf
- Center for Clinical and Translational Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA.,Department of Pediatrics, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - G Hidalgo
- James and Connie Maynard Children's Hospital, Greenville, NC, USA.,Department of Pediatrics, Brody School of Medicine, East Carolina University, Greenville, NC, USA
| | - W E Smoyer
- Center for Clinical and Translational Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA.,Department of Pediatrics, College of Medicine, The Ohio State University, Columbus, OH, USA
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8
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Abstract
Current literature shows an association of diabetes and secondary complications with chronic inflammation. Evidence of these immunological changes include altered levels of cytokines and chemokines, changes in the numbers and activation states of various leukocyte populations, apoptosis, and fibrosis during diabetes. Therefore, treatment of diabetes and its complications may include pharmacological strategies to reduce inflammation. Apart from anti-inflammatory drugs, various hypoglycemic agents have also been found to reduce inflammation that could contribute to improved outcomes. Extensive studies have been carried out with thiazolidinediones (peroxisome proliferator-activated receptor-γ agonist), dipeptidyl peptidase-4 inhibitors, and metformin (AMP-activated protein kinase activator) with each of these classes of compounds showing moderate-to-strong anti-inflammatory action. Sulfonylureas and alpha glucosidase inhibitors appeared to exert modest effects, while the injectable agents, insulin and glucagon-like peptide-1 receptor agonists, may improve secondary complications due to their anti-inflammatory potential. Currently, there is a lack of clinical data on anti-inflammatory effects of sodium–glucose cotransporter type 2 inhibitors. Nevertheless, for all these glucose-lowering agents, it is essential to distinguish between anti-inflammatory effects resulting from better glucose control and effects related to intrinsic anti-inflammatory actions of the pharmacological class of compounds.
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Affiliation(s)
- Vishal Kothari
- Department of Nutrition and Dietetics, Boshell Diabetes and Metabolic Diseases Research Program, Auburn University, Auburn, AL, USA
| | - John A Galdo
- Department of Pharmacy Practice, Samford University, Birmingham, AL, USA
| | - Suresh T Mathews
- Department of Nutrition and Dietetics, Samford University, Birmingham, AL, USA
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9
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Boullu-Ciocca S, Tassistro V, Dutour A, Grino M. Pioglitazone in adult rats reverses immediate postnatal overfeeding-induced metabolic, hormonal, and inflammatory alterations. Endocrine 2015; 50:608-19. [PMID: 26084260 DOI: 10.1007/s12020-015-0657-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 06/03/2015] [Indexed: 10/23/2022]
Abstract
Immediate postnatal overfeeding in rats, obtained by reducing the litter size, results in early-onset obesity. Such experimental paradigm programs overweight, insulin resistance, dyslipidemia, increased adipose glucocorticoid metabolism [up-regulation of glucocorticoid receptor (GR) and 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1)], and overexpression of proinflammatory cytokines in mesenteric adipose tissue (MAT) in adulthood. We studied the effects of pioglitazone, a PPARγ agonist, treatment on the above-mentioned overfeeding-induced alterations. Nine-month-old rats normofed or overfed during the immediate postnatal period were given pioglitazone (3 mg/kg/day) for 6 weeks. Pioglitazone stimulated weight gain and induced a redistribution of adipose tissue toward epididymal location with enhanced plasma adiponectin. Treatment normalized postnatal overfeeding-induced metabolic alterations (increased fasting insulinemia and free fatty acids) and mesenteric overexpression of GR, 11β-HSD11, CD 68, and proinflammatory cytokines mRNAs, including plasminogen-activator inhibitor type 1. Mesenteric GR mRNA levels correlated positively with mesenteric proinflammatory cytokines mRNA concentrations. In vitro incubation of MAT obtained from overfed rats demonstrated that pioglitazone induced a down-regulation of GR gene expression and normalized glucocorticoid-induced stimulation of 11β-HSD1 and plasminogen-activator inhibitor type 1 mRNAs. Our data show for the first time that the metabolic, endocrine, and inflammatory alterations induced by early-onset postnatal obesity can be reversed by pioglitazone at the adulthood. They demonstrate that pioglitazone, in addition to its well-established effect on adipose tissue redistribution and adiponectin secretion, reverses programing-induced adipose GR, 11β-HSD1, and proinflammatory cytokines overexpression, possibly through a GR-dependent mechanism.
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Affiliation(s)
- S Boullu-Ciocca
- Aix-Marseille Univ, Faculté de Médecine, 13385, Marseille, France
| | - V Tassistro
- Aix-Marseille Univ, Faculté de Médecine, 13385, Marseille, France
- Inserm, UMR1062, "Nutrition, Obesity and Risk of Thrombosis", 13385, Marseille, France
- INRA, UMR1260, 13385, Marseille, France
| | - A Dutour
- Aix-Marseille Univ, Faculté de Médecine, 13385, Marseille, France
- Inserm, UMR1062, "Nutrition, Obesity and Risk of Thrombosis", 13385, Marseille, France
- INRA, UMR1260, 13385, Marseille, France
| | - M Grino
- Aix-Marseille Univ, Faculté de Médecine, 13385, Marseille, France.
- Inserm, UMR1062, "Nutrition, Obesity and Risk of Thrombosis", 13385, Marseille, France.
- INRA, UMR1260, 13385, Marseille, France.
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10
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Collins PE, Grassia G, Colleran A, Kiely PA, Ialenti A, Maffia P, Carmody RJ. Mapping the Interaction of B Cell Leukemia 3 (BCL-3) and Nuclear Factor κB (NF-κB) p50 Identifies a BCL-3-mimetic Anti-inflammatory Peptide. J Biol Chem 2015; 290:15687-15696. [PMID: 25922067 DOI: 10.1074/jbc.m115.643700] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Indexed: 11/06/2022] Open
Abstract
The NF-κB transcriptional response is tightly regulated by a number of processes including the phosphorylation, ubiquitination, and subsequent proteasomal degradation of NF-κB subunits. The IκB family protein BCL-3 stabilizes a NF-κB p50 homodimer·DNA complex through inhibition of p50 ubiquitination. This complex inhibits the binding of the transcriptionally active NF-κB subunits p65 and c-Rel on the promoters of NF-κB target genes and functions to suppress inflammatory gene expression. We have previously shown that the direct interaction between p50 and BCL-3 is required for BCL-3-mediated inhibition of pro-inflammatory gene expression. In this study we have used immobilized peptide array technology to define regions of BCl-3 that mediate interaction with p50 homodimers. Our data show that BCL-3 makes extensive contacts with p50 homodimers and in particular with ankyrin repeats (ANK) 1, 6, and 7, and the N-terminal region of Bcl-3. Using these data we have designed a BCL-3 mimetic peptide based on a region of the ANK1 of BCL-3 that interacts with p50 and shares low sequence similarity with other IκB proteins. When fused to a cargo carrying peptide sequence this BCL-3-derived peptide, but not a mutated peptide, inhibited Toll-like receptor-induced cytokine expression in vitro. The BCL-3 mimetic peptide was also effective in preventing inflammation in vivo in the carrageenan-induced paw edema mouse model. This study demonstrates that therapeutic strategies aimed at mimicking the functional activity of BCL-3 may be effective in the treatment of inflammatory disease.
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Affiliation(s)
- Patricia E Collins
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, United Kingdom
| | - Gianluca Grassia
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, United Kingdom
| | - Amy Colleran
- Department of Biochemistry, University College Cork, Cork, Ireland
| | - Patrick A Kiely
- Department of Life Sciences, and Materials and Surface Science Institute, University of Limerick, Limerick, Ireland
| | - Armando Ialenti
- Department of Pharmacy, University of Napoli Federico II, Naples 80131, Italy
| | - Pasquale Maffia
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, United Kingdom; Department of Pharmacy, University of Napoli Federico II, Naples 80131, Italy
| | - Ruaidhrí J Carmody
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, United Kingdom.
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11
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Srivastava JK, Awatade NT, Bhat HR, Kmit A, Mendes K, Ramos M, Amaral MD, Singh UP. Pharmacological evaluation of hybrid thiazolidin-4-one-1,3,5-triazines for NF-κB, biofilm and CFTR activity. RSC Adv 2015. [DOI: 10.1039/c5ra09250g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
A series of hybrid thiazolidin-4-one-1,3,5-triazines was evaluated for NF-κB, biofilm and CFTR activity.
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Affiliation(s)
- Jitendra Kumar Srivastava
- Drug Design & Discovery Laboratory
- Department of Pharmaceutical Sciences
- Sam Higginbottom Institute of Agriculture, Technology & Sciences
- Allahabad
- India
| | - Nikhil T. Awatade
- University of Lisboa
- Faculty of Sciences
- BioISI – Biosystems & Integrative Sciences Institute
- 1749-016 Lisboa
- Portugal
| | - Hans Raj Bhat
- Drug Design & Discovery Laboratory
- Department of Pharmaceutical Sciences
- Sam Higginbottom Institute of Agriculture, Technology & Sciences
- Allahabad
- India
| | - Arthur Kmit
- Faculdade de Ciências Médicas - Universidade Estadual de Campinas R. Tessália Vieira de Camargo
- Campinas
- Brazil
| | - Karina Mendes
- University of Lisboa
- Faculty of Sciences
- BioISI – Biosystems & Integrative Sciences Institute
- 1749-016 Lisboa
- Portugal
| | - Margarida Ramos
- University of Lisboa
- Faculty of Sciences
- BioISI – Biosystems & Integrative Sciences Institute
- 1749-016 Lisboa
- Portugal
| | - Margarida D. Amaral
- University of Lisboa
- Faculty of Sciences
- BioISI – Biosystems & Integrative Sciences Institute
- 1749-016 Lisboa
- Portugal
| | - Udaya Pratap Singh
- Drug Design & Discovery Laboratory
- Department of Pharmaceutical Sciences
- Sam Higginbottom Institute of Agriculture, Technology & Sciences
- Allahabad
- India
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12
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Fuentes E, Palomo I. Mechanism of antiplatelet action of hypolipidemic, antidiabetic and antihypertensive drugs by PPAR activation. Vascul Pharmacol 2014; 62:162-6. [DOI: 10.1016/j.vph.2014.05.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 05/08/2014] [Accepted: 05/15/2014] [Indexed: 01/08/2023]
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13
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Chang SH, Wu LS, Chiou MJ, Liu JR, Yu KH, Kuo CF, Wen MS, Chen WJ, Yeh YH, See LC. Association of metformin with lower atrial fibrillation risk among patients with type 2 diabetes mellitus: a population-based dynamic cohort and in vitro studies. Cardiovasc Diabetol 2014; 13:123. [PMID: 25106079 PMCID: PMC4149273 DOI: 10.1186/s12933-014-0123-x] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Accepted: 08/04/2014] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Atrial fibrillation (AF), an inflammatory process involving arrhythmia, is associated with severe morbidity and mortality and commonly seen in patients with diabetes mellitus (DM). The effect of metformin, the most commonly used medication for patients with DM, on AF has not been investigated. The primary aim of this study was to examine whether metformin prevented the occurrence of AF in type 2 DM patients by analyzing a nationwide, population-based dynamic cohort. Additionally, we investigated the effect of metformin on tachycardia-induced myolysis and oxidative stress in atrial cells. METHODS The study population included 645,710 patients with type 2 diabetes and not using other anti-diabetic medication from a subset of the Taiwan National Health Insurance Research Database. Of these patients, those who used metformin were categorized as the user group, and the remaining were classified as the non-user group. The time-dependent Cox's proportional hazard model was used to examine the effect of metformin on AF and the status of metformin use was treated as a time-dependent covariate. HL-1 atrial cells were paced with or without metformin, and then troponin and heavy-chain-myosin were measured as markers of myolysis. RESULTS After 13 years of follow-up, 9,983 patients developed AF with an incidence rate of 1.5% (287 per 100,000 person-years). After adjusting for co-morbidities and medications, metformin independently protected the diabetic patients from new-onset AF with a hazard ratio of .81 (95% confidence interval 0.76-0.86, p < 0.0001). Metformin significantly decreased the extent of pacing-induced myolysis and the production of reactive oxygen species. CONCLUSION Metformin use was associated with a decreased risk of AF in patients with type 2 DM who were not using other anti-diabetic medication, probably via attenuation of atrial cell tachycardia-induced myolysis and oxidative stress.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Yung-Hsin Yeh
- Chang Gung University and Department of Cardiology, Chang Gung Memorial Hospital, Kweishan 333, Taoyuan, Taiwan.
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Yamamoto A, Kakuta H, Sugimoto Y. Involvement of glucocorticoid receptor activation on anti-inflammatory effect induced by peroxisome proliferator-activated receptor γ agonist in mice. Int Immunopharmacol 2014; 22:204-8. [PMID: 24975659 DOI: 10.1016/j.intimp.2014.06.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 06/04/2014] [Accepted: 06/13/2014] [Indexed: 02/03/2023]
Abstract
Glucocorticoids are effective anti-inflammatory agents widely used for the treatment of acute and chronic inflammatory diseases. Recent in vitro studies have proposed that glucocorticoid receptor (GR) activation is involved in peroxisome proliferator-activated receptor γ (PPARγ) agonist-induced effects. In this study, to examine the involvement of the GR in PPARγ agonist- and retinoid X receptor (RXR) agonist-mediated anti-inflammatory effects in vivo, we tested the anti-inflammatory effects of dexamethasone (a GR agonist) with pioglitazone (a PPARγ agonist) or 6-[N-ethyl-N-(3-isopropoxy-4-isopropylphenyl)-amino] nicotinic acid (NEt-3IP; an RXR agonist) by using an experimental model of carrageenan-induced inflammation. We also evaluated the effects of a GR antagonist on PPARγ agonist- or RXR agonist-induced anti-inflammatory effects. Results showed that the GR antagonist RU486 reduced the anti-inflammatory effects of GR or PPARγ agonists but not those of the RXR agonist. In addition, combinations of GR and PPARγ agonists or GR and RXR agonists had no effect on carrageenan-induced paw edema. Moreover, the PPARγ antagonist GW9662 and RXR antagonist 6-[N-4-(trifluoromethyl)-benzenesulfonyl-N-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthyl)-amino] nicotinic acid (NS-4TF) had no effect on the anti-inflammatory effect of the GR agonist dexamethasone. Therefore, it is suggested that GR activation in vivo does not play a direct role in PPARγ/RXR heterodimer signaling. In contrast, pioglitazone showed a partial anti-inflammatory effect via GR activation. These data provide evidence for the pro-inflammatory activity of pioglitazone.
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Affiliation(s)
- Atsuki Yamamoto
- Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Tsushima-naka 1-1-1, Kita-ku, Okayama 700-8530, Japan
| | - Hiroki Kakuta
- Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Tsushima-naka 1-1-1, Kita-ku, Okayama 700-8530, Japan
| | - Yukio Sugimoto
- Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Tsushima-naka 1-1-1, Kita-ku, Okayama 700-8530, Japan.
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15
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Paragh G, Seres I, Harangi M, Fülöp P. Dynamic interplay between metabolic syndrome and immunity. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 824:171-90. [PMID: 25039000 DOI: 10.1007/978-3-319-07320-0_13] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Obesity and its co-morbidities as metabolic syndrome, type 2 diabetes mellitus and cardiovascular diseases are major health problems worldwide. Several reports indicated that nutrient excess and metabolic syndrome are linked with altered immune response. Indeed, metabolic syndrome is characterized by insulin resistance and chronic low-grade inflammation, which conditions are the consequences of the complex interaction between adipocytes and immune cells. Enlarged white adipose tissue is infiltrated by immune cells and secretes various bioactive substances, like adipokines, cytokines and other inflammatory mediators. Due to its special architecture in which metabolic and immune cells are in intimate proximity, metabolic and immunologic pathways are closely integrated in adipose tissue. With the contribution of altered gut microbiota, adipokines and cytokines modulate insulin signaling and immune response leading to adipose tissue inflammation and systemic insulin resistance. In this chapter, we focus on the cellular and molecular mechanisms that lead to impaired insulin sensitivity and chronic low-grade inflammation in obesity. We also detail the potential role of adipokines and immune cells in this deleterious process, and the concerns of vaccination in metabolic syndrome. Finally, we address the links between obesity and gut microbiota as an emerging new field of interest, and scratch the surface of potential therapeutic opportunities.
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Affiliation(s)
- György Paragh
- Division of Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Nagyerdei krt. 98, Debrecen, H-4032, Hungary,
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16
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Mahmoud MF, El Shazly SM. Pioglitazone protects against cisplatin induced nephrotoxicity in rats and potentiates its anticancer activity against human renal adenocarcinoma cell lines. Food Chem Toxicol 2013; 51:114-22. [DOI: 10.1016/j.fct.2012.09.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Revised: 07/29/2012] [Accepted: 09/10/2012] [Indexed: 11/30/2022]
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17
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PPARγ Ligands Regulate Noncontractile and Contractile Functions of Airway Smooth Muscle: Implications for Asthma Therapy. PPAR Res 2012; 2012:809164. [PMID: 22966222 PMCID: PMC3431171 DOI: 10.1155/2012/809164] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Accepted: 06/12/2012] [Indexed: 01/22/2023] Open
Abstract
In asthma, the increase in airway smooth muscle (ASM) can contribute to inflammation, airway wall remodeling and airway hyperresponsiveness (AHR). Targetting peroxisome proliferator-activated receptor γ (PPARγ), a receptor upregulated in ASM in asthmatic airways, may provide a novel approach to regulate these contributions. This review summarises experimental evidence that PPARγ ligands, such as rosiglitazone (RGZ) and pioglitazone (PGZ), inhibit proliferation and inflammatory cytokine production from ASM in vitro. In addition, inhaled administration of these ligands reduces inflammatory cell infiltration and airway remodelling in mouse models of allergen-induced airways disease. PPARγ ligands can also regulate ASM contractility, with acute treatment eliciting relaxation of mouse trachea in vitro through a PPARγ-independent mechanism. Chronic treatment can protect against the loss of bronchodilator sensitivity to β2-adrenoceptor agonists and inhibit the development of AHR associated with exposure to nicotine in utero or following allergen challenge. Of particular interest, a small clinical trial has shown that oral RGZ treatment improves lung function in smokers with asthma, a group that is generally unresponsive to conventional steroid treatment. These combined findings support further investigation of the potential for PPARγ agonists to target the noncontractile and contractile functions of ASM to improve outcomes for patients with poorly controlled asthma.
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18
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Mahady SE, George J. Management of nonalcoholic steatohepatitis: an evidence-based approach. Clin Liver Dis 2012; 16:631-45. [PMID: 22824485 DOI: 10.1016/j.cld.2012.05.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) and its progressive form, nonalcoholic steatohepatitis (NASH), are an increasingly common cause of chronic liver disease in the developed world, with NASH projected to be the leading cause of liver transplantation in the United States by 2020. This review of NASH management addresses current data from the perspective of levels of evidence for therapeutic options in NASH, including lifestyle modification, drug therapies, and bariatric surgery. In particular, behavioral therapies to assist patients in adopting lifestyle changes are highlighted and a research agenda for future NASH management is presented.
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Affiliation(s)
- Suzanne E Mahady
- Storr Liver Unit, Westmead Millennium Institute, University of Sydney, New South Wales, Australia
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19
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Emerging PPARγ-Independent Role of PPARγ Ligands in Lung Diseases. PPAR Res 2012; 2012:705352. [PMID: 22778711 PMCID: PMC3385049 DOI: 10.1155/2012/705352] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 03/28/2012] [Accepted: 04/12/2012] [Indexed: 02/06/2023] Open
Abstract
Peroxisome proliferator activated receptor (PPAR)-γ is a nuclear hormone receptor that is activated by multiple agonists including thiazolidinediones, prostaglandins, and synthetic oleanolic acids. Many PPARγ ligands are under investigation as potential therapies for human diseases. These ligands modulate multiple cellular pathways via both PPARγ-dependent and PPARγ-independent mechanisms. Here, we review the role of PPARγ and PPARγ ligands in lung disease, with emphasis on PPARγ-independent effects. PPARγ ligands show great promise in moderating lung inflammation, as antiproliferative agents in combination to enhance standard chemotherapy in lung cancer and as treatments for pulmonary fibrosis, a progressive fatal disease with no effective therapy. Some of these effects occur when PPARγ is pharmaceutically antagonized or genetically PPARγ and are thus independent of classical PPARγ-dependent transcriptional control. Many PPARγ ligands demonstrate direct binding to transcription factors and other proteins, altering their function and contributing to PPARγ-independent inhibition of disease phenotypes. These PPARγ-independent mechanisms are of significant interest because they suggest new therapeutic uses for currently approved drugs and because they can be used as probes to identify novel proteins and pathways involved in the pathogenesis or treatment of disease, which can then be targeted for further investigation and drug development.
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Rosiglitazone regulates c-reactive protein-induced inflammatory responses via glucocorticoid receptor-mediated inhibition of p38 mitogen-activated protein kinase-toll-like receptor 4 signal pathway in vascular smooth muscle cells. J Cardiovasc Pharmacol 2011; 57:348-56. [PMID: 21383592 DOI: 10.1097/fjc.0b013e31820a0e67] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
C-reactive protein (CRP) activates toll-like receptor 4 (TLR4) to initiate inflammatory response involved in the pathogenesis of atherosclerosis through mitogen-activated protein kinase (MAPK) signal pathways. Rosiglitazone, a synthetic peroxisome proliferator-activated receptor γ (PPARγ) agonist, is considered to be an important inhibitor of the inflammatory response. The present study was to explore the effect of rosiglitazone on the CRP-induced inflammatory responses and the related signal pathway in vascular smooth muscle cells (VSMCs). The results showed that rosiglitazone reduced the expressions of proinflammatory cytokines, such as vascular endothelial growth factor-A and inducible nitric oxide synthase, and enhanced the expression or activation of anti-inflammatory transcription factors including PPARγ and glucocorticoid receptor (GR) in VSMCs in response to CRP. The further investigations indicated that rosiglitazone inhibited CRP-induced TLR4 expression and p38 MAPK phosphorylation in VSMCs, and TLR4 knockdown potentiated the inhibitory effects of rosiglitazone on vascular endothelial growth factor-A and inducible nitric oxide synthase expressions. In addition, GR antagonist RU486 but not PPARγ inhibitor GW9662 remarkably weakened the inhibitory effects of rosiglitazone on CRP-induced TLR4 expression and p38 phosphorylation in VSMCs. But GW9662 did not affect rosiglitazone-induced GR phosphorylation. These suggest that rosiglitazone exerts its anti-inflammatory effect through activating GR and subsequently inhibiting p38 MAPK-TLR4 signaling pathway in CRP-stimulated VSMCs.
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21
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Rocha VZ, Folco EJ. Inflammatory concepts of obesity. Int J Inflam 2011; 2011:529061. [PMID: 21837268 PMCID: PMC3151511 DOI: 10.4061/2011/529061] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Accepted: 05/25/2011] [Indexed: 12/11/2022] Open
Abstract
Obesity, long considered a condition characterized by the deposition of inert fat, is now recognized as a chronic and systemic inflammatory disease, where adipose tissue plays a crucial endocrine role through the production of numerous bioactive molecules, collectively known as adipokines. These molecules regulate carbohydrate and lipid metabolism, immune function and blood coagulability, and may serve as blood markers of cardiometabolic risk. Local inflammatory loops operate in adipose tissue as a consequence of nutrient overload, and crosstalk among its cellular constituents-adipocytes, endothelial and immune cells-results in the elaboration of inflammatory mediators. These mediators promote important systemic effects that can result in insulin resistance, dysmetabolism and cardiovascular disease. The understanding that inflammation plays a critical role in the pathogenesis of obesity-derived disorders has led to therapeutic approaches that target different points of the inflammatory network induced by obesity.
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Peroxisome proliferator activated receptor ligands as regulators of airway inflammation and remodelling in chronic lung disease. PPAR Res 2011; 2007:14983. [PMID: 18000530 PMCID: PMC2065911 DOI: 10.1155/2007/14983] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2007] [Accepted: 06/11/2007] [Indexed: 11/20/2022] Open
Abstract
Inflammation is a major component in the pathology of chronic lung diseases, including asthma. Anti-inflammatory treatment with corticosteroids is not effective in all patients. Thus, new therapeutic options are required to control diverse cellular functions that are currently not optimally targeted by these drugs in order to inhibit inflammation and its sequelae in lung disease. Peroxisome proliferator activated receptors (PPARs), originally characterised as regulators of lipid and glucose metabolism, offer marked potential in this respect. PPARs are expressed in both lung infiltrating and resident immune and inflammatory cells, as well as in resident and structural cells in the lungs, and play critical roles in the regulation of airway inflammation. In vitro, endogenous and synthetic ligands for PPARs regulate expression and release of proinflammatory cytokines and chemoattractants, and cell proliferation and survival. In murine models of allergen-induced inflammation, PPARα and PPARγ ligands reduce the influx of inflammatory cells, cytokine and mucus production, collagen deposition, and airways hyperresponsiveness. The activity profiles of PPAR ligands differ to corticosteroids, supporting the hypothesis that PPARs comprise additional therapeutic targets to mimimise the contribution of inflammation to airway remodelling and dysfunction.
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23
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In vivo and in vitro evidence that PPARγ ligands are antagonists of leptin signaling in breast cancer. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 179:1030-40. [PMID: 21704006 DOI: 10.1016/j.ajpath.2011.04.026] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Revised: 03/30/2011] [Accepted: 04/22/2011] [Indexed: 12/19/2022]
Abstract
Obesity is a major risk factor for the development and progression of breast cancer. Leptin, a cytokine mainly produced by adipocytes, plays a crucial role in mammary carcinogenesis and is elevated in hyperinsulinemia and insulin resistance. The antidiabetic thiazolidinediones inhibit leptin gene expression through ligand activation of the peroxisome proliferator-activated receptor-γ (PPARγ) and exert antiproliferative and apoptotic effects on breast carcinoma. In this study, we investigated the ability of PPARγ ligands to counteract leptin stimulatory effects on breast cancer growth in either in vivo or in vitro models. The results show that activation of PPARγ prevented the development of leptin-induced MCF-7 tumor xenografts and inhibited the increased cell-cell aggregation and proliferation observed on leptin exposure. PPARγ ligands abrogated the leptin-induced up-regulation of leptin gene expression and its receptors in breast cancer. PPARγ-mediated repression of leptin gene involved the recruitment of nuclear receptor corepressor protein and silencing mediator of retinoid and thyroid hormone receptors corepressors on the glucocorticoid responsive element site in the leptin gene expression regulatory region in the presence of glucocorticoid receptor and PPARγ. In addition, PPARγ ligands inhibited leptin signaling mediated by MAPK/STAT3/Akt phosphorylation and counteracted leptin stimulatory effect on estrogen signaling. These findings suggest that PPARγ ligands may have potential therapeutic benefits in the treatment of breast cancer.
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Agrawal S, Guess AJ, Benndorf R, Smoyer WE. Comparison of direct action of thiazolidinediones and glucocorticoids on renal podocytes: protection from injury and molecular effects. Mol Pharmacol 2011; 80:389-99. [PMID: 21636793 DOI: 10.1124/mol.111.071654] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The U.S. Food and Drug Administration-approved thiazolidinediones pioglitazone and rosiglitazone are peroxisome proliferator-activated receptor-γ (PPARγ) agonists developed to control serum glucose in patients with diabetes. They have been found to reduce proteinuria and microalbuminuria in both diabetic nephropathy and nondiabetic glomerulosclerosis. We hypothesized that the renal protective effects of thiazolidinediones result, at least in part, from their direct action on podocytes, similar to glucocorticoids. Treatment with pioglitazone, rosiglitazone, or dexamethasone significantly protected podocytes against puromycin aminonucleoside-induced injury (designed to mimic nephrotic syndrome-related injury), as determined by both cell survival and actin cytoskeletal integrity. Furthermore, we compared the ability of these drugs to modulate key signaling pathways in podocytes that may be critical to their protective effects. Rosiglitazone deactivated the mitogen-activated protein kinases (MAPKs), extracellular signal-regulated kinases 1/2, p38 MAPK, and stress-activated protein kinase/c-Jun NH₂-terminal kinase, whereas pioglitazone did not, and dexamethasone deactivated to some extent. Similar to dexamethasone, both thiazolidinediones increased the glucocorticoid receptor phosphorylation, and this response to rosiglitazone and possibly to pioglitazone was PPARγ-dependent. Furthermore, both drugs mimicked or enhanced the effects of dexamethasone on glucocorticoid-responsive genes in a PPARγ- and glucocorticoid receptor-dependent manner. In addition, both thiazolidinediones mimicked dexamethasone-induced effects on calcineurin activity. In summary, thiazolidinediones are able to modulate the glucocorticoid pathway and exert direct protective effects on podocytes, similar to glucocorticoids. This suggests that thiazolidinediones may have potential clinical utility as either primary or adjunctive therapy for nephrotic syndrome or other diseases treated with glucocorticoids. These findings may also lend mechanistic insight into the well established but poorly understood renal protective effects of thiazolidinediones in diabetic nephropathy.
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Affiliation(s)
- Shipra Agrawal
- Center for Clinical and Translational Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
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25
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Gene Expression Changes Induced by PPAR Gamma Agonists in Animal and Human Liver. PPAR Res 2010; 2010:325183. [PMID: 20981297 PMCID: PMC2963138 DOI: 10.1155/2010/325183] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Accepted: 07/15/2010] [Indexed: 01/15/2023] Open
Abstract
Thiazolidinediones are a class of Peroxisome Proliferator Activated Receptor γ (PPARγ) agonists that reduce insulin resistance in type 2 diabetic patients. Although no detectable hepatic toxicity has been evidenced in animal studies during preclinical trials, these molecules have nevertheless induced hepatic adverse effects in some treated patients. The mechanism(s) of hepatotoxicity remains equivocal. Several studies have been conducted using PCR analysis and microarray technology to identify possible target genes and here we review the data obtained from various in vivo and in vitro experimental models. Although PPARγ is expressed at a much lower level in liver than in adipose tissue, PPARγ agonists exert various PPARγ-dependent effects in liver in addition to PPARγ-independent effects. Differences in effects are dependent on the choice of agonist and experimental conditions in rodent animal studies and in rodent and human liver cell cultures. These effects are much more pronounced in obese and diabetic liver. Moreover, our own recent studies have shown major interindividual variability in the response of primary human hepatocyte populations to troglitazone treatment, supporting the occurrence of hepatotoxicity in only some individuals.
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26
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Gan N, Wu YC, Brunet M, Garrido C, Chung FL, Dai C, Mi L. Sulforaphane activates heat shock response and enhances proteasome activity through up-regulation of Hsp27. J Biol Chem 2010; 285:35528-36. [PMID: 20833711 DOI: 10.1074/jbc.m110.152686] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
It is conceivable that stimulating proteasome activity for rapid removal of misfolded and oxidized proteins is a promising strategy to prevent and alleviate aging-related diseases. Sulforaphane (SFN), an effective cancer preventive agent derived from cruciferous vegetables, has been shown to enhance proteasome activities in mammalian cells and to reduce the level of oxidized proteins and amyloid β-induced cytotoxicity. Here, we report that SFN activates heat shock transcription factor 1-mediated heat shock response. Specifically, SFN-induced expression of heat shock protein 27 (Hsp27) underlies SFN-stimulated proteasome activity. SFN-induced proteasome activity was significantly enhanced in Hsp27-overexpressing cells but absent in Hsp27-silenced cells. The role of Hsp27 in regulating proteasome activity was further confirmed in isogenic REG cells, in which SFN-induced proteasome activation was only observed in cells stably overexpressing Hsp27, but not in the Hsp27-free parental cells. Finally, we demonstrated that phosphorylation of Hsp27 is irrelevant to SFN-induced proteasome activation. This study provides a novel mechanism underlying SFN-induced proteasome activity. This is the first report to show that heat shock response by SFN, in addition to the antioxidant response mediated by the Keap1-Nrf2 pathway, may contribute to cytoprotection.
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Affiliation(s)
- Nanqin Gan
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC 20057, USA
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27
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Uchôa FDT, da Silva TG, de Lima MDCA, Galdino SL, Pitta IDR, Costa TD. Preclinical pharmacokinetic and pharmacodynamic evaluation of thiazolidinone PG15: an anti-inflammatory candidate. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.61.03.0008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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28
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Involvement of glucocorticoid receptor and peroxisome proliferator activated receptor-γ in pioglitazone mediated chronic gastric ulcer healing in rats. Eur J Pharmacol 2009; 609:118-25. [DOI: 10.1016/j.ejphar.2009.03.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2008] [Revised: 01/23/2009] [Accepted: 03/01/2009] [Indexed: 12/18/2022]
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29
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Matthews L, Berry A, Tersigni M, D’Acquisto F, Ianaro A, Ray D. Thiazolidinediones are partial agonists for the glucocorticoid receptor. Endocrinology 2009; 150:75-86. [PMID: 18801908 PMCID: PMC4110506 DOI: 10.1210/en.2008-0196] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Although thiazolidinediones were designed as specific peroxisome proliferator-activated receptor (PPAR)-gamma-ligands, there is evidence for some off-target effects mediated by a non-PPARgamma mechanism. Previously we have shown that rosiglitazone has antiinflammatory actions not explicable by activation of PPARgamma,but possibly by the glucocorticoid receptor (GR). Rosiglitazone induces nuclear translocation both of GR-green fluorescent protein, and endogenous GR in HeLa and U20S cells but with slower kinetics than dexamethasone. Rosiglitazone also induces GR phosphorylation (Ser211), a GR ligand-binding-specific effect. Rosiglitazone drives luciferase expression from a simple glucocorticoid-response element containing reporter gene in a GR-dependent manner (EC50 4 microm), with a similar amplitude response to the partial GR agonist RU486. Rosiglitazone also inhibits dexamethasone-driven reporter gene activity (IC50 2.9 microm) in a similar fashion to RU486, suggesting partial agonist activity. Importantly we demonstrate a similar effect in PPARgamma-null cells, suggesting both GR dependence and PPARgamma independence. Rosiglitazone also activates a GAL4-GR chimera, driving a upstream activating sequence promoter, demonstrating DNA template sequence independence and furthermore enhanced steroid receptor coactivator-1-GR interaction, measured by a mammalian two-hybrid assay. Both ciglitazone and pioglitazone, structurally related to rosiglitazone, show similar effects on the GR. The antiproliferative effect of rosiglitazone is increased in U20S cells that overexpress GR, suggesting a biologically important GR-dependent component of rosiglitazone action. Rosiglitazone is a partial GR agonist, affecting GR activation and trafficking to influence engagement of target genes and affect cell function. This novel mode of action may explain some off-target effects observed in vivo. Additionally, antagonism of glucocorticoid action may contribute to the antidiabetic actions of rosiglitazone.
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Affiliation(s)
- L Matthews
- Endocrine Sciences Research Group, Division of Cardiovascular and Endocrine Science, University of Manchester, Manchester, U.K.
| | - A Berry
- Endocrine Sciences Research Group, Division of Cardiovascular and Endocrine Science, University of Manchester, Manchester, U.K.
| | - M Tersigni
- Department of Experimental Pharmacology, University of Naples Federico II, Via Montesano 49, Naples, Italy
| | - F D’Acquisto
- Research Centre in Biochemical Pharmacology, William Harvey Research Institute, John Vane Science Centre, London, U.K.
| | - A Ianaro
- Department of Experimental Pharmacology, University of Naples Federico II, Via Montesano 49, Naples, Italy
- Joint corresponding authors. Address correspondence to: David Ray, Endocrine Sciences Research Group, Stopford Building, University of Manchester, Oxford Road., Manchester M13 9PT, United Kingdom. ; Angela Ianaro, Department of Experimental Pharmacology, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy.
| | - D Ray
- Endocrine Sciences Research Group, Division of Cardiovascular and Endocrine Science, University of Manchester, Manchester, U.K.
- Joint corresponding authors. Address correspondence to: David Ray, Endocrine Sciences Research Group, Stopford Building, University of Manchester, Oxford Road., Manchester M13 9PT, United Kingdom. ; Angela Ianaro, Department of Experimental Pharmacology, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy.
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Escribano L, Simón AM, Pérez-Mediavilla A, Salazar-Colocho P, Del Río J, Frechilla D. Rosiglitazone reverses memory decline and hippocampal glucocorticoid receptor down-regulation in an Alzheimer's disease mouse model. Biochem Biophys Res Commun 2008; 379:406-10. [PMID: 19109927 DOI: 10.1016/j.bbrc.2008.12.071] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2008] [Accepted: 12/13/2008] [Indexed: 12/28/2022]
Abstract
Clinical trials with rosiglitazone, a potent agonist at peroxisome proliferator-activated receptor gamma (PPARgamma) suggest an improvement of cognitive function in Alzheimer's disease (AD) patients. The mechanisms mediating this potential beneficial effect remain to be fully elucidated. In mice overexpressing mutant human amyloid precursor protein (hAPP), a model of AD, we found that memory impairment in the object recognition test was prevented and also reversed by chronic rosiglitazone treatment. Given the possible involvement of glucocorticoid receptors (GR) in the actions of PPARgamma-ligands, we studied the effect of chronic rosiglitazone treatment on GR levels in the hippocampus of hAPP mice. An early down-regulation of GR, not related to elevated plasma corticosterone levels, was found in different hippocampal subfields of the transgenic mice and this decrease was prevented by rosiglitazone. In parallel with behavioural studies, rosiglitazone also normalized GR levels in older animals. This effect may contribute to explain the attenuation of memory decline by PPARgamma activation in an AD mouse model.
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Affiliation(s)
- Luis Escribano
- Division of Neurosciences, CIMA, University of Navarra, Av. Pio XII 55, 31008 Pamplona, CIBERNED, Spain
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31
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Fang X, Zhang L, Feng Y, Zhao Y, Dai J. Immunotoxic effects of perfluorononanoic acid on BALB/c mice. Toxicol Sci 2008; 105:312-21. [PMID: 18583369 DOI: 10.1093/toxsci/kfn127] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The effects of perfluorononanoic acid (PFNA) on the immune system and its mechanism of action in mice have not been elucidated. Thus, BALB/c mice were exposed to the PFNA (0, 1, 3, or 5 mg/kg/day) for fourteen days. Exposure to PFNA led to a decrease in body weight and in the weight of the lymphoid organs. Cell cycle arrest and apoptosis were observed in the spleen and thymus following PFNA exposure. In the thymus, PFNA mostly modulated CD4+CD8+ thymocytes, whereas the F4/80+, CD11c+, and CD49b+ cells were major targets in the spleen. Although concanavalin A-induced T lymphocyte blastogenesis was not altered by PFNA, production of interleukin (IL)-4 and interferon-gamma by splenic lymphocytes was remarkably impaired. The levels of cortisol and adrenocorticotrophic hormone in sera were increased; however, the expression of glucocorticoid receptor in the thymus was unchanged. In addition, expression of the peroxisome proliferator-activated receptors (PPAR-alpha and PPAR-gamma) and IL-1beta were upregulated significantly in the thymus at a dose of 1 mg PFNA/kg/day. No significant changes in expression of the inhibitory protein IkappaBalpha and IkappaBalpha kinase were observed. Together, these results suggest that PFNA exerts toxic effects on lymphoid organs and T cell and innate immune cell homeostasis in mice and that these effects may result from the activation of PPAR-alpha, PPAR-gamma, and the hypothalamic-pituitary-adrenal axis. Interestingly, at the transcriptional level, the nuclear factor-kappa B signaling pathway appears to be uninvolved in the immunotoxic potential of PFNA.
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Affiliation(s)
- Xuemei Fang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100190, China
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Rizos CV, Liberopoulos EN, Mikhailidis DP, Elisaf MS. Pleiotropic effects of thiazolidinediones. Expert Opin Pharmacother 2008; 9:1087-108. [DOI: 10.1517/14656566.9.7.1087] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Zhang P, O'Loughlin L, Brindley DN, Reue K. Regulation of lipin-1 gene expression by glucocorticoids during adipogenesis. J Lipid Res 2008; 49:1519-28. [PMID: 18362392 DOI: 10.1194/jlr.m800061-jlr200] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Lipin-1 deficiency in the mouse causes generalized lipodystrophy, characterized by impaired adipose tissue development and insulin resistance. Lipin-1 expression in differentiating preadipocytes is required for normal expression of adipogenic transcription factors, including peroxisome proliferator-activated receptor gamma and CCAAT enhancer binding protein alpha, and for the synthesis of triacylglycerol. The requirement of lipin-1 for adipocyte differentiation can be explained, in part, by its activity as the sole adipocyte phosphatidic acid phosphatase-1 enzyme, which converts phosphatidate to diacylglycerol, the immediate precursor of triacylglycerol. Here we identify glucocorticoids as the stimulus for the induction of lipin-1 expression in differentiating adipocytes, and characterize a glucocorticoid response element (GRE) in the Lpin1 promoter. The Lpin1 GRE binds to the glucocorticoid receptor and leads to transcriptional activation in adipocytes and hepatocytes, as demonstrated by reporter gene transcription, electrophoretic mobility shift, and chromatin immunoprecipitation assays. This represents the first gene regulatory element identified to directly influence lipin-1 expression levels, and may modulate lipin-1 mRNA levels in adipose tissue and liver in conditions associated with increased local glucocorticoid concentrations in vivo, such as obesity and fasting.
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Affiliation(s)
- Peixiang Zhang
- Department of Human Genetics and Medicine, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA 90095, USA
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Abstract
After a long history of relative neglect by the scientific community, white adipose tissue is finally emerging as a central component of body homeostasis. Indeed, the explosion of obesity statistics worldwide encouraged the study of adipose tissue and the complications of increased adiposity, such as insulin resistance, type 2 diabetes, and accelerated vascular disease. Far beyond merely furnishing free fatty acids from triglyceride depots, a growing list of fat tissue-derived mediators has increased the understanding of the regulatory role of adipose tissue in metabolic control. Recently, inflammation within the obese adipose tissue has surfaced as another important link of obesity to its undesirable metabolic consequences.
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Affiliation(s)
- Viviane Zorzanelli Rocha
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA.
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McIntyre RS, Soczynska JK, Woldeyohannes HO, Lewis GF, Leiter LA, MacQueen GM, Miranda A, Fulgosi D, Konarski JZ, Kennedy SH. Thiazolidinediones: novel treatments for cognitive deficits in mood disorders? Expert Opin Pharmacother 2007; 8:1615-28. [PMID: 17685880 DOI: 10.1517/14656566.8.11.1615] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The aim of this review is to provide a rationale for evaluating thiazolidinediones (TZDs) as putative treatments for cognitive deficits in individuals with mood disorders. A MedLine search of all English-language articles published between January 1966 and August 2006 was conducted. The search terms were: the non-proprietary names of TZDs (e.g., rosiglitazone and pioglitazone), peroxisome proliferator-activated receptor, cognition, neuroprotection, inflammation, oxidative stress, cellular metabolism and excitotoxicity cross-referenced with the individual names of mood (e.g., major depressive disorder and bipolar disorder) and dementing disorders (e.g., Alzheimer's disease) as defined in the Diagnostic and Statistical Manual of Mental Disorders third edition, revised/fourth edition, text revision (DSM-III-R/IV-TR). The search was augmented with a manual review of article reference lists. Articles selected for review were based on adequacy of sample size, the use of standardized experimental procedures, validated assessment measures and overall manuscript quality. Contemporary pathophysiologic models of mood disorders emphasize alterations in neuronal plasticity, metabolism and cytoarchitecture with associated regional abnormalities in neuronal (and glial) density and morphology. These abnormalities are hypothesized to subserve cognitive deficits and other clinical features of mood disorders. TZDs may attenuate, abrogate and/or reverse the neurotoxic effects of depressive illness by means of disparate mechanisms, notably insulin signaling, anti-inflammation, glucocorticoid activity and cellular metabolism. Extant data provide the basis for formulating a hypothesis that TZDs may be salutary for cognitive deficits and several aspects of somatic health (e.g., cardiovascular disease) associated with mood disorders.
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Affiliation(s)
- Roger S McIntyre
- University of Toronto, Department of Psychiatry, Toronto, ON, Canada.
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Spears M, McSharry C, Thomson NC. Peroxisome proliferator-activated receptor-gamma agonists as potential anti-inflammatory agents in asthma and chronic obstructive pulmonary disease. Clin Exp Allergy 2007; 36:1494-504. [PMID: 17177672 DOI: 10.1111/j.1365-2222.2006.02604.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Inhaled corticosteroids are the most effective therapy for chronic persistent asthma and have a role in the treatment of chronic obstructive pulmonary disease (COPD). However, corticosteroids have reduced efficacy in some patients with asthma and fail to halt the progressive deterioration in lung function characteristic of COPD. Additional or alternative drug treatments to corticosteroids are required to improve control of inflammation in patients with therapy resistant airway disease. Peroxisome proliferator-activated receptor-gamma (PPAR-gamma) agonists have displayed potent anti-inflammatory properties in experimental models of asthma and other airway diseases and as a result have the potential to become an additional treatment for asthma and COPD. We review the evidence from these experimental models and their applicability to asthma and COPD and the requirements for future clinical and experimental research.
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Affiliation(s)
- M Spears
- Department of Respiratory Medicine, Division of Immunology, Infection and Inflammation, University of Glasgow, Glasgow, UK
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Xiong N, Sun F, Zhao H, Xiang J. Effect of Rosiglitazone Maleate on inflammation following cerebral ischemia/reperfusion in rats. ACTA ACUST UNITED AC 2007; 27:295-8. [PMID: 17641846 DOI: 10.1007/s11596-007-0320-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2007] [Indexed: 11/29/2022]
Abstract
In order to evaluate the neuroprotective effect of Rosiglitazone Maleate (RSG) against brain ischemic injury, the effects of Rosiglitazone Maleate on the inflammation following cerebral ischemia/reperfusion were investigated. Focal cerebral ischemia was induced by the intraluminal thread for cerebral middle artery (MCA) occlusion. Rosiglitazone Maleate at concentrations of 0.5, 2 and 5 mg/kg was infused by intragastric gavage twice immediately and 2 h after MCA occlusion, respectively. The effects of Rosiglitazone Maleate on brain swelling, myeloperoxidase and interleukin-6 mRNA level in brain tissue after MCA occlusion and reperfusion were evaluated. The results showed that as compared with the model control group, RSG (0.5 mg/kg) had no significant influence on brain swelling (P>0.05), but 2 mg/kg and 5 mg/kg RSG could significantly alleviate brain swelling (P<0.05). All different doses of RSG could obviously reduce MPO activity in brain tissue after MCA occlusion and reperfusion in a dose-dependent manner. RSG (0.5 and 2 mg/kg) could decrease the expression levels of IL-6 mRNA in brain tissue after MCA occlusion and reperfusion to varying degrees (P<0.05) with the difference being significant between them. It was concluded that RSG could effectively ameliorate brain ischemic injury after 24 h MCA occlusion and inhibit the inflammatory response after ischemia-reperfusion in this model.
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Affiliation(s)
- Nanxiang Xiong
- Department of Neurosurgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
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Abstract
Weight gain and obesity are major risk factors for conditions and diseases ranging from insulin resistance and type 2 diabetes mellitus to atherosclerosis and the sequelae of nonalcoholic fatty liver disease. A chronic, subacute state of inflammation often accompanies the accumulation of excess lipid in adipose tissue and liver (hepatic steatosis), evidenced by changes in both inflammatory cells and biochemical markers of inflammation. These changes can be seen in the involved tissues and systemically, in terms of elevated circulating levels of inflammatory markers. The link between obesity and inflammation has therefore raised the important question of whether obesity-induced inflammation plays a pathogenic role in the development and progression of these disorders. We review the rapidly expanding body of animal and clinical data that support potential roles for inflammation in the pathogenesis of insulin resistance and type 2 diabetes mellitus.
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McIntyre RS, Soczynska JK, Woldeyohannes H, Miranda A, Konarski JZ. Thiazolidinediones: from antioxidant to neurotherapeutic? Med Hypotheses 2007; 69:773-7. [PMID: 17408873 DOI: 10.1016/j.mehy.2007.01.078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2006] [Accepted: 01/21/2007] [Indexed: 11/26/2022]
Abstract
A prevailing paradigm regarding the pathophysiology of mood disorders posits that these syndromes are possibly neurodegenerative. Alterations in interacting biological networks which subserve metabolism, inflammation, immune function, and stress response are hypothesized to mediate the neurotoxicity and allostasis associated with mood disorders. Preclinical evidence indicates that thiazolidinediones (TZDs) exert neurotherapeutic (e.g., neurotrophic) effects. Preliminary clinical evidence also suggests that TZDs may be salutary for mental disorders in which neurocognitive deficits are a central feature. We propose that TZDs constitute a potentially novel disease-modifying treatment avenue for mood disorders.
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Affiliation(s)
- Roger S McIntyre
- Department of Psychiatry, University of Toronto, Toronto, Ont., Canada.
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Saponaro S, Guarnieri V, Pescarmona GP, Silvagno F. Long-term exposure to dehydroepiandrosterone affects the transcriptional activity of the glucocorticoid receptor. J Steroid Biochem Mol Biol 2007; 103:129-36. [PMID: 17071075 DOI: 10.1016/j.jsbmb.2006.08.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2006] [Accepted: 08/22/2006] [Indexed: 11/28/2022]
Abstract
Although the antiglucocorticoid effects of dehydroepiandrosterone (DHEA) have been demonstrated in vivo in many systems, controversial results have been reported by in vitro studies. In order to elucidate the long-term antiglucocorticoid effects of DHEA in vitro in a context more physiological than what proposed by previous works, we set up a system consisting of a carcinoma cell line relying on endogenously produced glucocorticoid receptor (GR) and stably expressing a reporter gene ErbB-2 under the control of a GR-dependent MMTV promoter. These cells grown in presence of low levels of serum glucocorticoids (GC) showed a basal translocation and activity of endogenous GR. The cells reacted to high concentrations of dexamethasone increasing GR nuclear import, although down-regulating receptor expression, and enhancing GR-dependent transcriptional activity, as shown by EMSA assay and expression of the reporter gene ErbB-2. The response to GC was also functional since the increase of ErbB-2 boosted cellular growth. On the contrary, 72h of incubation with DHEA diminished basal GR-dependent reporter expression and abated cellular proliferation. Analysing molecular mechanisms responsible for this failed transcriptional activity, upon prolonged treatment with DHEA we observed a slow nuclear import of GR not followed by its recruitment to DNA. These data add novel information about the long-term effects of DHEA in vitro.
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Affiliation(s)
- Sara Saponaro
- Department of Genetics, Biology and Biochemistry, University of Turin, Via Santena 5bis, 10126 Turin, Italy
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Irace C, Esposito G, Maffettone C, Rossi A, Festa M, Iuvone T, Santamaria R, Sautebin L, Carnuccio R, Colonna A. Oxalomalate affects the inducible nitric oxide synthase expression and activity. Life Sci 2006; 80:1282-91. [PMID: 17257628 DOI: 10.1016/j.lfs.2006.12.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2006] [Revised: 12/07/2006] [Accepted: 12/15/2006] [Indexed: 11/30/2022]
Abstract
Inducible nitric oxide synthase (iNOS) is an homodimeric enzyme which produces large amounts of nitric oxide (NO) in response to inflammatory stimuli. Several factors affect the synthesis and catalytic activity of iNOS. Particularly, dimerization of NOS monomers is promoted by heme, whereas an intracellular depletion of heme and/or L-arginine considerably decreases NOS resistance to proteolysis. In this study, we found that oxalomalate (OMA, oxalomalic acid, alpha-hydroxy-beta-oxalosuccinic acid), an inhibitor of both aconitase and NADP-dependent isocitrate dehydrogenase, inhibited nitrite production and iNOS protein expression in lipopolysaccharide (LPS)-activated J774 macrophages, without affecting iNOS mRNA content. Furthermore, injection of OMA precursors to LPS-stimulated rats also decreased nitrite production and iNOS expression in isolated peritoneal macrophages. Interestingly, alpha-ketoglutarate or succinyl-CoA administration reversed OMA effect on NO production, thus correlating NO biosynthesis with the anabolic capacity of Krebs cycle. When protein synthesis was blocked by cycloheximide in LPS-activated J774 cells treated with OMA, iNOS protein levels, evaluated by Western blot analysis and (35)S-metabolic labelling, were decreased, suggesting that OMA reduces iNOS biosynthesis and induces an increase in the degradation rate of iNOS protein. Moreover, we showed that OMA inhibits the activity of the iNOS from lung of LPS-treated rats by enzymatic assay. Our results, demonstrating that OMA acts regulating synthesis, catalytic activity and degradation of iNOS, suggest that this compound might have a potential role in reducing the NO overproduction occurring in some pathological conditions.
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Affiliation(s)
- Carlo Irace
- Dipartimento di Farmacologia Sperimentale, Università di Napoli Federico II, via D. Montesano 49, 80131-Napoli, Italy
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Okosieme OE, Parkes AB, Premawardhana LDKE, Thomas AW, Evans LM, Lazarus JH. Peripheral cytokine expression in autoimmune thyroiditis: effects of in vitro modulation by rosiglitazone and dexamethasone. Thyroid 2006; 16:953-60. [PMID: 17042679 DOI: 10.1089/thy.2006.16.953] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND In Hashimoto's thyroiditis (HT), there is evidence for activation of peripheral T-lymphocytes that predominantly express a T helper 1 (T(H)1) cytokine bias. However, the immunomodulatory factors involved in regulating this response have so far received scant attention. In this study, we examine the effects of the glucocorticoid, dexamethasone, and the peroxisome proliferator-activated receptor-gamma (PPAR-gamma) ligand, rosiglitazone on the expression of interferon (IFN)-gamma (T(H)1) and interleukin (IL)-4 (T(H)2) by activated peripheral CD4(+) and CD8(+) lymphocytes in patients with HT (n = 10) and healthy control subjects (n = 12). METHODS Peripheral blood mononuclear cells (PBMC) were stimulated in vitro with phorbolmyristate acetate (PMA) and ionomycin in the presence or absence of varying doses of dexamethasone and rosiglitazone (0.01 microM, 1.0 microM, and 100 microM). Cytokine expression was determined by flow cytometry. RESULTS CD4(+) and CD8(+) IFN-gamma expression was greater in HT than controls (14.87 versus 9.25; p < 0.05 and 21.34 versus 10.16; p < 0.01, respectively). A dose-dependent inhibition of IFN-gamma expression was seen with dexamethasone and rosiglitazone. Inhibition of CD4(+) and CD8(+) IFN-gamma expression with both dexamethasone and rosiglitazone was greater in control subjects than in patients (p < 0.05). There was no significant difference in IL-4 expression between patients and control groups and its expression remained unaffected by either compound. CONCLUSIONS We show that CD4(+) and CD8(+) T lymphocytes from HT patients express a type 1 cytokine bias that is significantly more resistant to in vitro modulation by rosiglitazone and dexamethasone. Further studies are needed to clarify if this resistance plays a role in the pathogenesis of autoimmune thyroid disease (AITD).
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Affiliation(s)
- O E Okosieme
- Centre for Endocrine and Diabetes Science, School of Medicine, Cardiff University, Cardiff, United Kingdom.
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Abstract
Over a hundred years ago, high doses of salicylates were shown to lower glucose levels in diabetic patients. This should have been an important clue to link inflammation to the pathogenesis of type 2 diabetes (T2D), but the antihyperglycemic and antiinflammatory effects of salicylates were not connected to the pathogenesis of insulin resistance until recently. Together with the discovery of an important role for tissue macrophages, these new findings are helping to reshape thinking about how obesity increases the risk for developing T2D and the metabolic syndrome. The evolving concept of insulin resistance and T2D as having immunological components and an improving picture of how inflammation modulates metabolism provide new opportunities for using antiinflammatory strategies to correct the metabolic consequences of excess adiposity.
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Affiliation(s)
- Steven E Shoelson
- Joslin Diabetes Center and Department of Medicine, Harvard Medical School, Boston, Massachusetts 02215, USA.
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Sun X, Han R, Wang Z, Chen Y. Regulation of adiponectin receptors in hepatocytes by the peroxisome proliferator-activated receptor-gamma agonist rosiglitazone. Diabetologia 2006; 49:1303-10. [PMID: 16609881 DOI: 10.1007/s00125-006-0228-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2006] [Accepted: 01/27/2006] [Indexed: 10/24/2022]
Abstract
AIMS/HYPOTHESIS Adiponectin is an adipocyte-derived hormone that plays a critical role in the development of type 2 diabetes via interaction with adiponectin receptors 1 (ADIPOR1) and 2 (ADIPOR2). Rosiglitazone is a peroxisome proliferator-activated receptor-gamma (PPARG) agonist that is widely used in the treatment of type 2 diabetes. We hypothesised that rosiglitazone regulates lipid and glucose metabolism through modulation of the expression of adiponectin receptors in the liver. METHODS The expression of ADIPOR1 and ADIPOR2 was analysed in HepG2 hepatocytes. The promoters of adiponectin receptors were isolated and used to analyse the transcriptional regulation. The expression of adiponectin receptors in the liver was determined in mice treated with rosiglitazone. RESULTS Rosiglitazone elevated the mRNA and protein levels of ADIPOR2 and stimulated ADIPOR2 promoter in HepG2 cells. Analysis with the ADIPOR2 promoter revealed a putative rosiglitazone-responsive region that contained a glucocorticoid receptor (GR)-binding element. The GR agonist dexamethasone synergised with rosiglitazone to stimulate the ADIPOR2 promoter wheras the GR antagonist RU486 abolished this stimulation. Treatment of mice with rosiglitazone elevated the expression of ADIPOR2 in the liver. CONCLUSIONS/INTERPRETATION This study indicates that rosiglitazone can elevate the expression of ADIPOR2 in hepatocytes. Our data also suggest that the PPARG agonist rosiglitazone can interact functionally with a GR element in the ADIPOR2 promoter to mediate stimulation of transcription. This study thus reveals a new paradigm underlying the therapeutic effect of PPARG activators in the treatment of type 2 diabetes.
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Affiliation(s)
- X Sun
- Institute for Nutritional Sciences, Shanghai Institute for Biological Sciences (SIBS), Chinese Academy of Sciences, 294 Tai Yuan Rd., Shanghai, 200031, People's Republic of China
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Chu CS, Lee KT, Lee MY, Su HM, Voon WC, Sheu SH, Lai WT. Effects of rosiglitazone alone and in combination with atorvastatin on nontraditional markers of cardiovascular disease in patients with type 2 diabetes mellitus. Am J Cardiol 2006; 97:646-50. [PMID: 16490430 DOI: 10.1016/j.amjcard.2005.09.101] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Revised: 09/13/2005] [Accepted: 09/13/2005] [Indexed: 11/17/2022]
Abstract
Combination therapy of rosiglitazone and atorvastatin has been shown to have beneficial effects on glycemic control and lipid profiles in patients with type 2 diabetes mellitus. This study investigated the effects of the combination of rosiglitazone and atorvastatin on vascular inflammation by studying their effects on levels of biomarkers in patients with type 2 diabetes mellitus. Thirty patients with type 2 diabetes mellitus and hyperlipidemia were enrolled to receive rosiglitazone monotherapy at 4 mg/day for 3 months and then atorvastatin at 10 mg/day was added for 3 more months as combined therapy. Inflammatory biomarkers, including high-sensitivity C-reactive protein (hs-CRP), matrix metalloproteinase-9 (MMP-9), soluble CD40 ligand (sCD40L), and adiponectin, and lipid profiles were measured at the time of initiation, after rosiglitazone monotherapy and after combination therapy with rosiglitazone and atorvastatin. With treatment of rosiglitazone at 4 mg/day monotherapy for 3 months, hs-CRP levels decreased significantly by 26% (p <0.05) and adiponectin levels increased significantly by 192% (p <0.05), but no significant changes in levels of MMP-9 and sCD40L were demonstrated. After combination therapy, hs-CRP levels further significantly decreased by another 23% (p <0.05) and adiponectin further increased by another 124%. In addition, serum levels of MMP-9, sCD40L, total cholesterol, and low-density lipoprotein cholesterol decreased significantly compared with baseline levels. In conclusion, combination therapy with rosiglitazone and atorvastatin not only significantly improved lipid profiles but also decreased levels of vascular biomarkers, such as hs-CRP, MMP-9, and sCD40L, and increased serum adiponectin levels in patients with type 2 diabetes mellitus.
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Affiliation(s)
- Chih-Sheng Chu
- The Section of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Chung-Ho Memorial Hospital, Kaohsiung, Taiwan
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Ialenti A, Di Meglio P, Grassia G, Maffia P, Di Rosa M, Lanzetta R, Molinaro A, Silipo A, Grant W, Ianaro A. A novel lipid A fromHalomonas magadiensis inhibits enteric LPS-induced human monocyte activation. Eur J Immunol 2006; 36:354-60. [PMID: 16365914 DOI: 10.1002/eji.200535305] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Lipopolysaccharide (LPS) endotoxin is the bacterial product responsible for the clinical syndrome of Gram-negative septicemia and endotoxic shock. During sepsis, microbial antigens, such as LPS, activate monocytes and macrophages to produce several pro-inflammatory cytokines, among which tumor necrosis factor-alpha (TNF-alpha) appears to be very important for the development of endotoxic shock. The endotoxic properties of LPS principally reside in the lipid A (LIP A) component, which is the primary immunostimulatory center of Gram-negative bacteria. In recent years there has been a continuous effort to identify molecules able to antagonize the deleterious effects of endotoxic shock. In this study we show that a novel LIP A fraction from the LPS of Halomonas magadiensis (Hm), a Gram-negative extremophilic and alkaliphilic bacterium, significantly inhibits the synthesis of TNF-alpha by human monocytes activated by Escherichia coli LPS. LIP A from Hm exerts these effects by interfering with E. coli LPS for activation of Toll-like receptor 4 expressed in human cells. This result defines Hm LIP A as a novel class of LPS antagonist whose structural features could be utilized for the design of compounds for the treatment of Gram-negative sepsis.
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Affiliation(s)
- Armando Ialenti
- Department of Experimental Pharmacology, University of Naples Federico II, 80131 Naples, Italy
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47
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Maiuri MC, De Stefano D, Di Meglio P, Irace C, Savarese M, Sacchi R, Cinelli MP, Carnuccio R. Hydroxytyrosol, a phenolic compound from virgin olive oil, prevents macrophage activation. Naunyn Schmiedebergs Arch Pharmacol 2005; 371:457-65. [PMID: 16025269 DOI: 10.1007/s00210-005-1078-y] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2005] [Accepted: 06/09/2005] [Indexed: 01/04/2023]
Abstract
We investigated the effect of hydroxytyrosol (HT), a phenolic compound from virgin olive oil, on inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) expression in J774 murine macrophages stimulated with lipopolysaccharide (LPS). Incubation of cells with LPS caused an increase in iNOS and COX-2 mRNA and protein level as well as ROS generation, which was prevented by HT. In addition, HT blocked the activation of nuclear factor-kappaB (NF-kappaB), signal transducer and activator of transcription-1alpha (STAT-1alpha) and interferon regulatory factor-1 (IRF-1). These results, showing that HT down-regulates iNOS and COX-2 gene expression by preventing NF-kappaB, STAT-1alpha and IRF-1 activation mediated through LPS-induced ROS generation, suggest that it may represent a non-toxic agent for the control of pro-inflammatory genes.
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Affiliation(s)
- Maria Chiara Maiuri
- Dipartimento di Farmacologia Sperimentale, Università degli Studi di Napoli Federico II, Via D. Montesano n. 49, 80131 Naples, Italy
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