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Genetic Polymorphism of Matrix Metalloproteinase-9 and Susceptibility to Myocardial Infarction: A Meta-Analysis. DISEASE MARKERS 2022; 2022:5507153. [PMID: 35075377 PMCID: PMC8783703 DOI: 10.1155/2022/5507153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 12/10/2021] [Indexed: 12/01/2022]
Abstract
Objective Current findings on the association between MMP-9 rs3918242 and susceptibility to myocardial infarction (MI) are inconsistent, and their definite relationship is discussed in this meta-analysis. Methods Eligible literatures reporting MMP-9 rs3918242 and susceptibility to MI were searched in PubMed, Cochrane Library, CNRI, and VIP using keywords such as “MMP-9”, “matrix metallopeptidase-9” and “myocardial infarction”, “acute myocardial infarction”, “AMI”, and “polymorphism”. Data from eligible literatures were extracted for calculating OR and corresponding 95% CI using RevMan 5.3 and STATA12.0. Results Ten independent literatures reporting MMP-9 rs3918242 and susceptibility to MI were enrolled. Compared with subjects carrying CT&TT genotype of MMP-9 rs3918242, susceptibility to MI was lower in those carrying CC genotype (OR = 1.49, 95%CI = 1.19–1.86, P = 0.0004). Such a significance was observed in the overdominant (OR = 1.27, 95%CI = 1.14–1.41, P < 0.0001) and allele genetic models (OR = 1.43, 95%CI = 1.17–1.74, P = 0.0005) as well. This finding was also valid in the Asian population. Conclusions Mutation on MMP-9 rs3918242 has a potential relevance with susceptibility to MI.
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Zhang K, Kong J, Liu B, Meng X. Regulatory T cells suppress the expression of COX-2 in vulnerable plaque. Heart Vessels 2019; 35:278-283. [DOI: 10.1007/s00380-019-01491-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 08/23/2019] [Indexed: 10/26/2022]
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Gargiulo S, Rossin D, Testa G, Gamba P, Staurenghi E, Biasi F, Poli G, Leonarduzzi G. Up-regulation of COX-2 and mPGES-1 by 27-hydroxycholesterol and 4-hydroxynonenal: A crucial role in atherosclerotic plaque instability. Free Radic Biol Med 2018; 129:354-363. [PMID: 30312760 DOI: 10.1016/j.freeradbiomed.2018.09.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 09/26/2018] [Accepted: 09/29/2018] [Indexed: 12/12/2022]
Abstract
Atherosclerosis is currently understood to be mainly the consequence of a complicated inflammatory process at the different stages of plaque development. Among the several inflammatory molecules involved, up-regulation of the functional cyclooxygenase 2/membrane-bound prostaglandin E synthase 1 (COX-2/mPGES-1) axis plays a key role in plaque development. Excessive production of oxidized lipids, following low-density lipoprotein (LDL) oxidation, is a characteristic feature of atherosclerosis. Among the oxidized lipids of LDLs, the oxysterol 27-hydroxycholesterol (27-OH) and the aldehyde 4-hydroxynonenal (HNE) substantially accumulate in the atherosclerotic plaque, contributing to its progression and instability through a variety of processes. This study shows that 27-OH and HNE promote up-regulation of both the inducible enzymes COX-2 and mPGES-1, leading to increased production of prostaglandin (PG) E2 and inducible nitric oxide synthase, and the subsequent release of nitric oxide in human promonocytic U937 cells. The study also examined the potential involvement of the functionally coupled COX-2/mPGES-1 in enhancing the production of certain pro-inflammatory cytokines and of matrix metalloproteinase 9 by U937 cells. This enhancement is presumably due to the induction of PGE2 synthesis, as a result of the up-regulation of the COX-2/mPGES-1, stimulated by the two oxidized lipids, 27-OH and HNE. Induction of PGE2 synthesis might thus be a mechanism of plaque instability and eventual rupture, contributing to matrix metalloproteinase production by activated macrophages.
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Affiliation(s)
- Simona Gargiulo
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Daniela Rossin
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Gabriella Testa
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Paola Gamba
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Erica Staurenghi
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Fiorella Biasi
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Giuseppe Poli
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Gabriella Leonarduzzi
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy.
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Guo T, Hao H, Zhou L, Zhou F, Yu D. Association of SNPs in the TIMP-2 gene and large artery atherosclerotic stroke in southern Chinese Han population. Oncotarget 2018; 9:4698-4706. [PMID: 29435135 PMCID: PMC5797006 DOI: 10.18632/oncotarget.23473] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 12/05/2017] [Indexed: 12/26/2022] Open
Abstract
Tissue inhibitor of matrix metalloproteinase 2 (TIMP-2) regulates the extracellular matrix degradation, which involved in vascular remodeling and dysfunction, destabilization of atherosclerotic plaque and many other pathological processes. The rupture of atherosclerotic plaque is the trigger of Large artery atherosclerotic (LAA) stroke. We speculate that the Single nucleotide polymorphisms (SNPs) in TIMP-2 may have an association with LAA stroke. To prove this hypothesis, we conducted this case-control study. 250 LAA stroke patients and 250 healthy controls were collected for the analysis of TIMP-2 polymorphisms. Among six SNPs, we detected no deviation from Hardy-Weinberg equilibrium in control group. There was a significant difference in rs4789936 T allele frequency between patient and control groups (OR = 0.68, 95% CI = 0.51-0.91, P = 0.009), which means lower risk of LAA stroke. We observed the rs4789936 had a decreased risk of LAA stroke according to the codominant (OR = 0.64, 95% CI = 0.44-0.92, P = 0.026), dominant (OR = 0.62, 95% CI = 0.43-0.88, P = 0.008), overdominant (OR = 0.68, 95% CI = 0.48-0.98, P = 0.039), log-additive (OR = 0.68, 95% CI = 0.51-0.91, P = 0.009) models analyses. However, these findings could only validate under dominant model (OR = 0.65, 95% CI = 0.42-1.00, P = 0.049) after adjustment of gender and age. The results indicate a potential association between TIMP-2 variants and LAA stroke risk in southern Chinese Han population.
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Affiliation(s)
- Tie Guo
- Haikou Hospital of Xiangya Medical College of Central South University, Haikou, Hainan 570208, China
| | - Haizhen Hao
- Haikou Hospital of Xiangya Medical College of Central South University, Haikou, Hainan 570208, China
| | - Lv Zhou
- Haikou Hospital of Xiangya Medical College of Central South University, Haikou, Hainan 570208, China
| | - Feng Zhou
- Haikou Hospital of Xiangya Medical College of Central South University, Haikou, Hainan 570208, China
| | - Dan Yu
- Haikou Hospital of Xiangya Medical College of Central South University, Haikou, Hainan 570208, China
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5
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Metalloproteinases in atherosclerosis. Eur J Pharmacol 2017; 816:93-106. [DOI: 10.1016/j.ejphar.2017.09.007] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 08/31/2017] [Accepted: 09/08/2017] [Indexed: 11/20/2022]
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Berardi C, Wassel CL, Decker PA, Larson NB, Kirsch PS, de Andrade M, Tsai MY, Pankow JS, Sale MM, Sicotte H, Tang W, Hanson NQ, McDermott MM, Criqui MH, Allison MA, Bielinski SJ. Elevated Levels of Adhesion Proteins Are Associated With Low Ankle-Brachial Index. Angiology 2017; 68:322-329. [PMID: 27436494 PMCID: PMC5247409 DOI: 10.1177/0003319716659178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Inflammation plays a pivotal role in peripheral artery disease (PAD). Cellular adhesion proteins mediate the interaction of leukocytes with endothelial cells during inflammation. To determine the association of cellular adhesion molecules with ankle-brachial index (ABI) and ABI category (≤1.0 vs >1.0) in a diverse population, 15 adhesion proteins were measured in the Multi-Ethnic Study of Atherosclerosis (MESA). To assess multivariable associations of each protein with ABI and ABI category, linear and logistic regression was used, respectively. Among 2364 participants, 23 presented with poorly compressible arteries (ABI > 1.4) and were excluded and 261 had ABI ≤ 1.0. Adjusting for traditional risk factors, elevated levels of soluble P-selectin, hepatocyte growth factor, and secretory leukocyte protease inhibitor were associated with lower ABI ( P = .0004, .001, and .002, respectively). Per each standard deviation of protein, we found 26%, 20%, and 19% greater odds of lower ABI category ( P = .001, .01, and .02, respectively). Further investigation into the adhesion pathway may shed new light on biological mechanisms implicated in PAD.
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Affiliation(s)
- Cecilia Berardi
- Department of Internal Medicine, Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, NY, USA
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Christine L. Wassel
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Colchester, VT, USA
| | - Paul A. Decker
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | | | - Phillip S. Kirsch
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Mariza de Andrade
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Michael Y. Tsai
- Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | - James S. Pankow
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN, USA
| | - Michele M. Sale
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA, USA
| | - Hugues Sicotte
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | - Weihong Tang
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN, USA
| | - Naomi Q. Hanson
- Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, USA
| | - Mary M. McDermott
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Michael H. Criqui
- Department of Family Medicine and Public Health, University of California, San Diego, La Jolla, CA, USA
| | - Michael A. Allison
- Department of Family Medicine and Public Health, University of California, San Diego, La Jolla, CA, USA
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Brown BA, Williams H, George SJ. Evidence for the Involvement of Matrix-Degrading Metalloproteinases (MMPs) in Atherosclerosis. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2017; 147:197-237. [PMID: 28413029 DOI: 10.1016/bs.pmbts.2017.01.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Atherosclerosis leads to blockage of arteries, culminating in myocardial infarction, and stroke. The involvement of matrix-degrading metalloproteinases (MMPs) in atherosclerosis is established and many studies have highlighted the importance of various MMPs in this process. MMPs were first implicated in atherosclerosis due to their ability to degrade extracellular matrix components, which can lead to increased plaque instability. However, more recent work has highlighted a multitude of roles for MMPs in addition to breakdown of extracellular matrix proteins. MMPs are now known to be involved in various stages of plaque progression: from initial macrophage infiltration to plaque rupture. This chapter summarizes the development and progression of atherosclerotic plaques and the contribution of MMPs. We provide data from human studies showing the effect of MMP polymorphisms and the expression of MMPs in both the atherosclerotic plaque and within plasma. We also discuss work in animal models of atherosclerosis that show the effect of gain or loss of function of MMPs. Together, the data provided from these studies illustrate that MMPs are ideal targets as both biomarkers and potential drug therapies for atherosclerosis.
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Affiliation(s)
- Bethan A Brown
- School of Clinical Sciences, University of Bristol, Bristol, United Kingdom
| | - Helen Williams
- School of Clinical Sciences, University of Bristol, Bristol, United Kingdom
| | - Sarah J George
- School of Clinical Sciences, University of Bristol, Bristol, United Kingdom.
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Di Gregoli K, Jenkins N, Salter R, White S, Newby AC, Johnson JL. MicroRNA-24 regulates macrophage behavior and retards atherosclerosis. Arterioscler Thromb Vasc Biol 2014; 34:1990-2000. [PMID: 24990232 DOI: 10.1161/atvbaha.114.304088] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Our recent studies have highlighted membrane type-1 matrix metalloproteinase (MMP)-14 as a selective marker for an invasive subset of macrophages potentially related to atherosclerotic plaque progression. Moreover, colony stimulating factors (CSF) may exert divergent effects on macrophage MMP expression, possibly through microRNAs. We, therefore, aim to identify and test the pathophysiological role of microRNAs, which modulate macrophage MMP-14 expression in atherosclerotic plaque progression. APPROACH AND RESULTS Compared with macrophage CSF-differentiated macrophages, granulocyte/macrophage CSF-matured macrophages exhibited reduced MMP-14 mRNA levels but increased protein expression and activity, which resulted in heightened macrophage invasion. MicroRNA-24, identified to target MMP-14, was accordingly increased in macrophage CSF compared with granulocyte/macrophage CSF macrophages. Silencing microRNA-24 in macrophage CSF macrophages significantly increased MMP-14 expression and enhanced their invasive capacity, mimicking granulocyte/macrophage CSF macrophages, and suggesting that granulocyte/macrophage CSF modulates MMP-14 protein expression and subsequent macrophage invasion in a microRNA-24-dependent manner. In human coronary atherosclerotic plaques, increased MMP-14 protein expression in foam cell macrophages was associated with lesions exhibiting histological characteristics associated with an unstable phenotype. Furthermore, microRNA-24 expression in these atherosclerotic plaques was inversely related to MMP-14 protein expression. Moreover, stable plaques contained higher microRNA-24 levels than unstable plaques, and microRNA-24 colocalized with foam cell macrophages that exhibited low MMP-14 protein expression. Finally, in atherosclerotic mice (apolipoprotein E-deficient), microRNA-24 inhibition increased plaque size and macrophage MMP-14 expression. CONCLUSIONS Taken together, our data demonstrates that downregulation of microRNA-24 promotes an invasive macrophage subset and plays a novel regulatory role in MMP-14 proteolytic activity and, therefore, plaque stability, highlighting its therapeutic potential.
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Affiliation(s)
- Karina Di Gregoli
- From the School of Clinical Sciences, University of Bristol, Bristol, England, United Kingdom
| | - Nicholas Jenkins
- From the School of Clinical Sciences, University of Bristol, Bristol, England, United Kingdom
| | - Rebecca Salter
- From the School of Clinical Sciences, University of Bristol, Bristol, England, United Kingdom
| | - Stephen White
- From the School of Clinical Sciences, University of Bristol, Bristol, England, United Kingdom
| | - Andrew C Newby
- From the School of Clinical Sciences, University of Bristol, Bristol, England, United Kingdom
| | - Jason L Johnson
- From the School of Clinical Sciences, University of Bristol, Bristol, England, United Kingdom.
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9
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Qian YN, Luo YT, Duan HX, Feng LQ, Bi Q, Wang YJ, Yan XY. Adhesion molecule CD146 and its soluble form correlate well with carotid atherosclerosis and plaque instability. CNS Neurosci Ther 2014; 20:438-45. [PMID: 24612514 DOI: 10.1111/cns.12234] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 01/09/2014] [Accepted: 01/10/2014] [Indexed: 12/11/2022] Open
Abstract
AIMS Intraplaque neovascularization and foam cell infiltration contribute to the development of unstable plaque, leading to thromboembolism and stroke. Cell adhesion molecules (CAMs) have been reported to be involved in the progression of atherosclerosis and plaque vulnerability. The aim of this study was to assess the association of adhesion molecule CD146 with carotid plaque instability. METHODS We collected forty atherosclerotic plaques from 40 patients undergoing carotid endarterectomy. The clinical information of each patient was obtained, and the plaque morphology and characteristics were examined by the ultrasound. The CD146 expressions of the plaques were graded by using semiquantitative scales. The serum level of soluble form of CD146 was detected by enzyme-linked immunosorbent assay (ELISA). RESULTS CD146 expression was mainly on the intraplaque blood vessels and infiltrated macrophages. The CD146 expression was strongly correlated with the matrix metalloproteinase-9(MMP-9)expressions (P < 0.001) in the plaques. Soluble CD146 (sCD146) was also elevated in patients with atherosclerotic plaques. There was significant correlation between the increased CD146 expression and sCD146 level (P = 0.0057). sCD146 correlated well with serum MMP-9 (P < 0.0044), IL-6 (P = 0.0044) and high sensitivity C-reactive protein (hsCRP) (P = 0.005). CONCLUSIONS Adhesion molecules CD146 and its soluble form strongly correlated with the development of inflammation of atherosclerosis and plaque instability. CD146 may be a promising biomarker for monitoring the development and instability of atherosclerotic plaque in patients with carotid diseases.
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Affiliation(s)
- Yi-Ning Qian
- Department of Neurology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
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10
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Gaudreault N, Kumar N, Olivas VR, Eberlé D, Stephens K, Raffai RL. Hyperglycemia impairs atherosclerosis regression in mice. THE AMERICAN JOURNAL OF PATHOLOGY 2013; 183:1981-1992. [PMID: 24113453 DOI: 10.1016/j.ajpath.2013.08.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 07/23/2013] [Accepted: 08/12/2013] [Indexed: 02/01/2023]
Abstract
Diabetic patients are known to be more susceptible to atherosclerosis and its associated cardiovascular complications. However, the effects of hyperglycemia on atherosclerosis regression remain unclear. We hypothesized that hyperglycemia impairs atherosclerosis regression by modulating the biological function of lesional macrophages. HypoE (Apoe(h/h)Mx1-Cre) mice express low levels of apolipoprotein E (apoE) and develop atherosclerosis when fed a high-fat diet. Atherosclerosis regression occurs in these mice upon plasma lipid lowering induced by a change in diet and the restoration of apoE expression. We examined the morphological characteristics of regressed lesions and assessed the biological function of lesional macrophages isolated with laser-capture microdissection in euglycemic and hyperglycemic HypoE mice. Hyperglycemia induced by streptozotocin treatment impaired lesion size reduction (36% versus 14%) and lipid loss (38% versus 26%) after the reversal of hyperlipidemia. However, decreases in lesional macrophage content and remodeling in both groups of mice were similar. Gene expression analysis revealed that hyperglycemia impaired cholesterol transport by modulating ATP-binding cassette A1, ATP-binding cassette G1, scavenger receptor class B family member (CD36), scavenger receptor class B1, and wound healing pathways in lesional macrophages during atherosclerosis regression. Hyperglycemia impairs both reduction in size and loss of lipids from atherosclerotic lesions upon plasma lipid lowering without significantly affecting the remodeling of the vascular wall.
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Affiliation(s)
- Nathalie Gaudreault
- Surgical Service, VA Medical Center San Francisco, San Francisco, California; Division of Vascular and Endovascular Surgery, Department of Surgery, University of California San Francisco, San Francisco, California
| | - Nikit Kumar
- Surgical Service, VA Medical Center San Francisco, San Francisco, California; Division of Vascular and Endovascular Surgery, Department of Surgery, University of California San Francisco, San Francisco, California
| | - Victor R Olivas
- Surgical Service, VA Medical Center San Francisco, San Francisco, California; Division of Vascular and Endovascular Surgery, Department of Surgery, University of California San Francisco, San Francisco, California
| | - Delphine Eberlé
- Surgical Service, VA Medical Center San Francisco, San Francisco, California; Division of Vascular and Endovascular Surgery, Department of Surgery, University of California San Francisco, San Francisco, California
| | - Kyle Stephens
- Surgical Service, VA Medical Center San Francisco, San Francisco, California; Division of Vascular and Endovascular Surgery, Department of Surgery, University of California San Francisco, San Francisco, California
| | - Robert L Raffai
- Surgical Service, VA Medical Center San Francisco, San Francisco, California; Division of Vascular and Endovascular Surgery, Department of Surgery, University of California San Francisco, San Francisco, California.
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Decreased numbers of regulatory T cells are associated with human atherosclerotic lesion vulnerability and inversely correlate with infiltrated mature dendritic cells. Atherosclerosis 2013; 230:92-9. [DOI: 10.1016/j.atherosclerosis.2013.06.014] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 06/11/2013] [Accepted: 06/18/2013] [Indexed: 12/21/2022]
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Lenglet S, Thomas A, Chaurand P, Galan K, Mach F, Montecucco F. Molecular imaging of matrix metalloproteinases in atherosclerotic plaques. Thromb Haemost 2012; 107:409-16. [PMID: 22274652 DOI: 10.1160/th11-10-0717] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Accepted: 12/09/2011] [Indexed: 01/06/2023]
Abstract
Ischaemic stroke and myocardial infarction often result from the sudden rupture of an atherosclerotic plaque. The subsequent arterial thrombosis occluding the vessel lumen has been widely indicated as the crucial acute event causing peripheral tissue ischaemia. A complex cross-talk between systemic and intraplaque inflammatory mediators has been shown to regulate maturation, remodeling and final rupture of an atherosclerotic plaque. Matrix metalloproteinases (MMPs) are proteolytic enzymes (released by several cell subsets within atherosclerotic plaques), which favour atherogenesis and increase plaque vulnerability. Thus, the assessment of intraplaque levels and activity of MMP might be of pivotal relevance in the evaluation of the risk of rupture. New imaging approaches, focused on the visualisation of inflammation in the vessel wall and plaque, may emerge as tools for individualised risk assessment and prevention of events. In this review, we summarize experimental findings of the currently available invasive and noninvasive imaging techniques, used to detect the presence and activity of MMPs in atherosclerotic plaques.
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Affiliation(s)
- Sébastien Lenglet
- Cardiology Division, Foundation for Medical Research, Department of Medical Specialties, University of Geneva, Geneva, Switzerland
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Shimizu Y, Temma T, Sano K, Ono M, Saji H. Development of membrane type-1 matrix metalloproteinase-specific activatable fluorescent probe for malignant tumor detection. Cancer Sci 2011; 102:1897-903. [PMID: 21718387 DOI: 10.1111/j.1349-7006.2011.02020.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Membrane type-1 matrix metalloproteinase (MT1-MMP) is a protease that activates pro-MMP-2 and pro-MMP13, which are related to tumor malignancy. Therefore, probes that specifically image MT1-MMP would be useful for malignant tumor diagnosis. In the present study, we prepared rhodamine X-conjugated anti-MT1- MMP antibody (anti-MT1-MMP mAb-ROX) as an activatable fluorescent probe and evaluated its usefulness for MT1-MMP-specific imaging. Anti-MT1-MMP mAb-ROX was obtained in a quenched form with approximately three ROX molecules per mAb. Its fluorescence intensity increased approximately 14-fold in the presence of detergent, which is suitable for activatable systems. C6 glioma cells and MCF-7 human breast adenocarcinoma cells were used as MT1-MMP-positive and MT1-MMP-negative models, respectively. The fluorescence intensity of C6 cells treated with anti-MT1-MMP mAb-ROX, but not ROX-conjugated isotype control antibody (NC Ab-ROX), increased with time and was significantly higher than that of MCF-7 cells at 6 h (P < 0.001). The fluorescence intensity of cells treated with anti-MT1-MMP mAb-ROX was also suppressed by pre-treatment with a MT1-MMP endocytosis inhibitor (P < 0.05). Furthermore, the probes were intravenously administered to C6 and MCF-7 xenografted mice. The tumor-to-muscle (T/M) ratio of the anti-MT1-MMP mAb-ROX group was 15.1 ± 3.2 at 48 h and was significantly higher than that of the NC Ab-ROX group (T/M ratio = 4.6 ± 3.0, P < 0.05) in C6 xenografted mice, while the T/M ratio of the anti-MT1-MMP mAb-ROX and NC Ab-ROX groups was not different in MCF-7 xenografted mice. These findings suggest that anti-MT1-MMP mAb-ROX is a promising probe for specifically detecting MT1-MMP-expressing tumors.
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Affiliation(s)
- Yoichi Shimizu
- Department of Patho-Functional Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
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14
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Xie X, Ma YT, Yang YN, Fu ZY, Li XM, Huang D, Ma X, Chen BD, Liu F. Interaction between COX-2 G-765C and smoking in relation to coronary artery disease in a Chinese Uighur population. Clin Chem Lab Med 2010; 49:55-60. [PMID: 21091235 DOI: 10.1515/cclm.2011.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Coronary artery disease (CAD) is a complex multifactorial and polygenic disorder where multiple environmental and genetic factors are involved simultaneously. The purpose of this study was to explore the relationship between the interaction of cyclooxygenase-2 (COX-2) gene polymorphism and smoking and CAD in a Uighur population. METHODS Using a case-control study of Chinese Uighur CAD patients (n=430) and healthy controls (n=470), we investigated the roles of G-765C polymorphism in the COX-2 gene (PTGS2) by the use of polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis. RESULTS The PTGS2 GG genotype was significantly more prevalent in CAD patients (84.6% vs. 78.3%; p=0.014). Multiple logistic regression analysis showed two independent risk factors: smoking (OR 1.89, 95% CI 1.01-5.24; p=0.008) and hypertension (OR 2.73, 95% CI 1.59-7.21; p=0.001). Moreover, there was a synergistic effect between smoking and the PTGS2 polymorphism and the occurrence of CAD (interaction p=0.009). The odds ratio (OR) estimated by the combined analysis of the PTGS2 GG genotype and smoking history (OR 4.09, 95% CI 2.7-9.3) was markedly higher than that estimated separately from the PTGS2 GG genotype (OR 1.28, 95% CI 0.8-1.9) or smoking (OR 2.51, 95% CI 1.5-5.7) alone. Plasma 6-keto-PGF1α, a stable metabolite of PGI(2), was lower in individuals with the PTGS2 GG genotype (p<0.05). Smoking could further lower plasma 6-keto-PGF1α concentrations in GG genotype carriers than non-smokers, especially in patients with CAD. CONCLUSIONS The PTGS2 polymorphism and smoking were synergistically and significantly associated in Chinese Uighur patients with CAD.
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Affiliation(s)
- Xiang Xie
- Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, P.R. China
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15
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Kuge Y, Takai N, Ogawa Y, Temma T, Zhao Y, Nishigori K, Ishino S, Kamihashi J, Kiyono Y, Shiomi M, Saji H. Imaging with radiolabelled anti-membrane type 1 matrix metalloproteinase (MT1-MMP) antibody: potentials for characterizing atherosclerotic plaques. Eur J Nucl Med Mol Imaging 2010; 37:2093-104. [DOI: 10.1007/s00259-010-1521-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2009] [Accepted: 06/03/2010] [Indexed: 11/30/2022]
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Volcik KA, Campbell S, Chambless LE, Coresh J, Folsom AR, Mosley TH, Ni H, Wagenknecht LE, Wasserman BA, Boerwinkle E. MMP2 genetic variation is associated with measures of fibrous cap thickness: The Atherosclerosis Risk in Communities Carotid MRI Study. Atherosclerosis 2010; 210:188-93. [PMID: 20064641 PMCID: PMC2862087 DOI: 10.1016/j.atherosclerosis.2009.12.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Revised: 11/16/2009] [Accepted: 12/04/2009] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Genetic variation in matrix metalloproteinase (MMP) promoter regions alter the transcriptional activity of MMPs and has been consistently associated with CHD, presumably through plaque degradation and remodeling. We examined the association of MMP promoter variation with multiple plaque characteristics measured by gadolinium-enhanced MRI among 1700 participants in the Atherosclerosis Risk in Communities (ARIC) Carotid MRI Study. METHODS For the analyses presented here, 1700 participants of the biracial ARIC Carotid MRI Study ( approximately 1000 participants with thick carotid artery walls and approximately 700 randomly sampled participants) were evaluated for associations of MMP genetic variation with multiple plaque characteristics, including carotid artery wall thickness, lipid core and fibrous cap measures. MRI studies were performed on a 1.5T scanner equipped with a bilateral 4-element phased array carotid coil. RESULTS Fifty-one percent of the participants were female, 77% white, 23% African American, and the mean age was 70 years. MMP2 C-1306T variant genotypes (CT+TT) were significantly associated with higher cap thickness measures, but not with wall thickness or lipid core measures. Individuals with the CC genotype had approximately 0.1mm thinner cap thickness compared to those carrying a T allele (P=0.02). CONCLUSION Genetic variation within the MMP2 promoter region was associated with cap thickness and therefore may influence the role of MMP2 in plaque vulnerability.
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Affiliation(s)
- Kelly A Volcik
- University of Texas Health Science Center School of Public Health, Human Genetics Center, 1200 Hermann Pressler, Houston, TX 77030, United States.
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The lectin concanavalin-A signals MT1-MMP catalytic independent induction of COX-2 through an IKKgamma/NF-kappaB-dependent pathway. J Cell Commun Signal 2010; 4:31-8. [PMID: 20195390 PMCID: PMC2821472 DOI: 10.1007/s12079-009-0084-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2009] [Accepted: 12/22/2009] [Indexed: 02/03/2023] Open
Abstract
The lectin from Canavalia ensiformis (Concanavalin-A, ConA), one of the most abundant lectins known, enables one to mimic biological lectin/carbohydrate interactions that regulate extracellular matrix protein recognition. As such, ConA is known to induce membrane type-1 matrix metalloproteinase (MT1-MMP) which expression is increased in brain cancer. Given that MT1-MMP correlated to high expression of cyclooxygenase (COX)-2 in gliomas with increasing histological grade, we specifically assessed the early proinflammatory cellular signaling processes triggered by ConA in the regulation of COX-2. We found that treatment with ConA or direct overexpression of a recombinant MT1-MMP resulted in the induction of COX-2 expression. This increase in COX-2 was correlated with a concomitant decrease in phosphorylated AKT suggestive of cell death induction, and was independent of MT1-MMP's catalytic function. ConA- and MT1-MMP-mediated intracellular signaling of COX-2 was also confirmed in wild-type and in Nuclear Factor-kappaB (NF-kappaB) p65(-/-) mutant mouse embryonic fibroblasts (MEF), but was abrogated in NF-kappaB1 (p50)(-/-) and in I kappaB kinase (IKK) gamma(-/-) mutant MEF cells. Collectively, our results highlight an IKK/NF-kappaB-dependent pathway linking MT1-MMP-mediated intracellular signaling to the induction of COX-2. That signaling pathway could account for the inflammatory balance responsible for the therapy resistance phenotype of glioblastoma cells, and prompts for the design of new therapeutic strategies that target cell surface carbohydrate structures and MT1-MMP-mediated signaling. Concise summary Concanavalin-A (ConA) mimics biological lectin/carbohydrate interactions that regulate the proinflammatory phenotype of cancer cells through yet undefined signaling. Here we highlight an IKK/NF-kappaB-dependent pathway linking MT1-MMP-mediated intracellular signaling to the induction of cyclooxygenase-2, and that could be responsible for the therapy resistance phenotype of glioblastoma cells.
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Kim CS, Moon IS, Park JH, Shin WC, Chun HS, Lee SY, Kook JK, Kim HJ, Park JC, Endou H, Kanai Y, Lee BK, Kim DK. Inhibition of L-Type Amino Acid Transporter Modulates the Expression of Cell Cycle Regulatory Factors in KB Oral Cancer Cells. Biol Pharm Bull 2010; 33:1117-21. [DOI: 10.1248/bpb.33.1117] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Chun Sung Kim
- Department of Oralbiochemistry, Chosun University School of Dentistry
| | - In-Sung Moon
- Oral Biology Research Institute, Chosun University School of Dentistry
| | - Ju-Hyun Park
- Oral Biology Research Institute, Chosun University School of Dentistry
| | - Woo-Cheol Shin
- Oral Biology Research Institute, Chosun University School of Dentistry
| | - Hong Sung Chun
- Department of Biotechnology (BK21 Program), Chosun University
| | - Sook-Young Lee
- Research Center for Oral Disease Regulation of the Aged, Chosun University School of Dentistry
| | - Joong-Ki Kook
- Department of Oralbiochemistry, Chosun University School of Dentistry
| | - Heung-Joong Kim
- Oral Biology Research Institute, Chosun University School of Dentistry
| | - Joo-Cheol Park
- Department of Oral Histology and Developmental Biology, Seoul National University School of Dentistry
| | - Hitoshi Endou
- Department of Pharmacology and Toxicology, Kyorin University School of Medicine
| | - Yoshikatsu Kanai
- Department of Pharmacology, Osaka University Graduate School of Medicine
| | | | - Do Kyung Kim
- Oral Biology Research Institute, Chosun University School of Dentistry
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Kuge Y, Obokata N, Kimura H, Katada Y, Temma T, Sugimoto Y, Aita K, Seki KI, Tamaki N, Saji H. Synthesis and evaluation of a radioiodinated lumiracoxib derivative for the imaging of cyclooxygenase-2 expression. Nucl Med Biol 2009; 36:869-76. [PMID: 19875043 DOI: 10.1016/j.nucmedbio.2009.07.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 07/14/2009] [Accepted: 07/26/2009] [Indexed: 12/25/2022]
Abstract
INTRODUCTION Despite extensive attempts to develop cyclooxygenase (COX)-2 imaging radiotracers, no suitable positron emission tomography (PET)/single photon emission computed tomography (SPECT) tracers are currently available for in vivo imaging of COX-2 expression. The aims of this study were to synthesize and evaluate a radioiodinated derivative of lumiracoxib, 2-[(2-fluoro-6-iodophenyl)-amino]-5-methylphenylacetic acid (FIMA), which is structurally distinct from other drugs in the class and has weakly acidic properties, as a SPECT tracer for imaging COX-2 expression. METHODS The COX inhibitory potency was assessed by measuring COX-catalyzed oxidation with hydrogen peroxide. Cell uptake characteristics of (125)I-FIMA were assessed in control and linterfero/interferon-gamma-stimulated macrophages. The biodistribution of (125)I-FIMA was determined by the ex vivo tissue counting method in rats. RESULTS The COX-2 inhibitory potency of FIMA (IC(50)=2.46 microM) was higher than that of indomethacin (IC(50)=20.9 microM) and was comparable to lumiracoxib (IC(50)=0.77 microM) and diclofenac (IC(50)=0.98 microM). The IC(50) ratio (COX-1/COX-2=182) indicated FIMA has a high isoform selectivity for COX-2. (125)I-FIMA showed a significantly higher accumulation in COX-2 induced macrophages than in control macrophages, which decreased with nonradioactive FIMA in a concentration dependent manner. The biodistribution study showed rapid clearance of (125)I-FIMA from the blood and most organs including the liver and kidneys. No significant in vivo deiodination was observed with radioiodinated FIMA. CONCLUSIONS FIMA showed high inhibitory potency and selectivity for COX-2. Radioiodinated FIMA showed specific accumulation into COX-2 induced macrophages, no significant in vivo deiodination and rapid blood clearance. Radioiodinated FIMA deserves further investigation as a SPECT radiopharmaceutical for imaging COX-2 expression.
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Affiliation(s)
- Yuji Kuge
- Department of Patho-Functional Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan.
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Santovito D, Mezzetti A, Cipollone F. Cyclooxygenase and prostaglandin synthases: roles in plaque stability and instability in humans. Curr Opin Lipidol 2009; 20:402-8. [PMID: 19741338 DOI: 10.1097/mol.0b013e32832fa22c] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Cyclooxygenase (COX) is the key enzyme of the arachidonic acid metabolism and it plays a major role in development of both coronary and cerebrovascular disease. In this review, we will analyze the role of COX and prostaglandin synthases in plaque stability. RECENT FINDINGS As shown by experimental studies based on biochemical measurement of eicosanoid biosynthesis and by the results of clinical trials, COX plays a key role in plaque evolution. Two COX-isozymes have been identified, COX-1 and COX-2, with different tissue distribution, substrate specificity, regulatory mechanism and susceptibility to drugs inhibition. Whereas, the role of platelet COX-1 in acute coronary syndrome and ischemic stroke is definitely established through several large clinical studies with aspirin, the role of COX-2 in these settings is still under investigation because this enzyme was characterized only recently and its inhibitors (coxibs) became available only in 1998. Recent findings seem to suggest that functional consequences of COX-2 expression and inhibition in different clinical settings may depend on different expression of upstream and downstream receptors as well as by genetic polymorphism. SUMMARY COX-2 and prostaglandin synthases and their modulation play a major role in plaque homeostasis and in its clinical manifestations.
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Affiliation(s)
- Donato Santovito
- Italian Society for the Study of Atherosclerosis, Abruzzo section, Chieti, Italy
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Huang CN, Chan KC, Lin WT, Su SL, Wang CJ, Peng CH. Hibiscus sabdariffa inhibits vascular smooth muscle cell proliferation and migration induced by high glucose--a mechanism involves connective tissue growth factor signals. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:3073-3079. [PMID: 19301817 DOI: 10.1021/jf803911n] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Recently, the herbal extract of Hibiscus sabdariffa was shown to have multiple bioactive effects, including anti-atherosclerosis. On the basis of this, we aimed to examine whether the polyphenolic isolate of H. sabdariffa (HPI) could protect high-glucose-treated vascular smooth muscle cell (VSMC) and its putative transduction signals. Results showed that HPI dose- and time-dependently reduced the high-glucose-stimulated cell proliferation and migration. HPI suppressed the proliferating cell nuclear antigen (PCNA) level and matrix metalloproteinase (MMP)-2 activation. In addition, the expressions of connective tissue growth factor (CTGF) and receptor of advanced glycation end product (RAGE) enhanced by high glucose were prominently suppressed by HPI. The proliferation signal mediated by high glucose was demonstrated via CTGF/RAGE, while MMP-2 was regulated by CTGF but not RAGE. Conclusively, the results suggest that HPI potentially can be a promising adjuvant herbal therapy for diabetic patients.
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Affiliation(s)
- Chien-Ning Huang
- Department of Internal Medicine, Chung-Shan Medical University Hospital, School of Medicine, Chung-Shan Medical University, Taichung 402, Taiwan
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Annabi B, Laflamme C, Sina A, Lachambre MP, Béliveau R. A MT1-MMP/NF-kappaB signaling axis as a checkpoint controller of COX-2 expression in CD133+ U87 glioblastoma cells. J Neuroinflammation 2009; 6:8. [PMID: 19272160 PMCID: PMC2655289 DOI: 10.1186/1742-2094-6-8] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Accepted: 03/09/2009] [Indexed: 12/19/2022] Open
Abstract
Background The CD133(+) stem cell population in recurrent gliomas is associated with clinical features such as therapy resistance, blood-brain barrier disruption and, hence, tumor infiltration. Screening of a large panel of glioma samples increasing histological grade demonstrated frequencies of CD133(+) cells which correlated with high expression of cyclooxygenase (COX)-2 and of membrane type-1 matrix metalloproteinase (MT1-MMP). Methods We used qRT-PCR and immunoblotting to examine the molecular interplay between MT1-MMP and COX-2 gene and protein expression in parental, CD133(+), and neurospheres U87 glioma cell cultures. Results We found that CD133, COX-2 and MT1-MMP expression were enhanced when glioma cells were cultured in neurosphere conditions. A CD133(+)-enriched U87 glioma cell population, isolated from parental U87 cells with magnetic cell sorting technology, also grew as neurospheres and showed enhanced COX-2 expression. MT1-MMP gene silencing antagonized COX-2 expression in neurospheres, while overexpression of recombinant MT1-MMP directly triggered COX-2 expression in U87 cells independent from MT1-MMP's catalytic function. COX-2 induction by MT1-MMP was also validated in wild-type and in NF-κB p65-/- mutant mouse embryonic fibroblasts, but was abrogated in NF-κB1 (p50-/-) mutant cells. Conclusion We provide evidence for enhanced COX-2 expression in CD133(+) glioma cells, and direct cell-based evidence of NF-κB-mediated COX-2 regulation by MT1-MMP. The biological significance of such checkpoint control may account for COX-2-dependent mechanisms of inflammatory balance responsible of therapy resistance phenotype of cancer stem cells.
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Affiliation(s)
- Borhane Annabi
- Laboratoire d'Oncologie Moléculaire, Département de Chimie, Centre de Recherche BIOMED, Université du Québec à Montréal, Quebec, Canada.
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Xie X, Ma YT, Fu ZY, Yang YN, Ma X, Chen BD, Wang YH, Liu F. Association of polymorphisms of PTGS2 and CYP8A1 with myocardial infarction. Clin Chem Lab Med 2009; 47:347-52. [DOI: 10.1515/cclm.2009.078] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract: Cyclooxygenase-2 (COX-2) and prostacyclin synthase (PGIS) are enzymes involved in prostaglandin and prostacyclin synthesis, which have been linked to cardiovascular disease risk. We hypothesized that genetic variations altering the function of these enzymes would modify the risk of myocardial infarction (MI).: In a Chinese case control study of MI patients (n=356) and healthy controls (n=350), we investigated the roles of polymorphisms in the PGIS gene (: The CC genotype of: The CC genotype ofClin Chem Lab Med 2009;47:347–52.
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Shiomi M, Fan J. Unstable coronary plaques and cardiac events in myocardial infarction-prone Watanabe heritable hyperlipidemic rabbits: questions and quandaries. Curr Opin Lipidol 2008; 19:631-6. [PMID: 18957890 DOI: 10.1097/mol.0b013e3283189c18] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Use of suitable animal models is essential for investigation of the mechanisms underlying cardiac events and development of the therapeutic strategies; however, ideal animal models that can recapitulate human coronary atherosclerosis and subsequent acute myocardial infarction are still lacking. In this article, we review the insights learned from myocardial infarction-prone Watanabe heritable hyperlipidemic (designated as WHHLMI) rabbits and discuss the possibility of using this model for the study of human acute coronary syndromes. RECENT FINDINGS The vulnerable plaques of human coronary arteries are histologically characterized by a large lipid core and a thin fibrous cap with inflammatory cells. Recent studies have revealed that inflammatory cells and inflammatory mediators (such as cytokines and matrix metalloproteinases) play an important role in the plaque rupture. SUMMARY We developed the WHHLMI rabbit that shows spontaneous myocardial infarction caused by coronary atherosclerosis. The coronary lesions of WHHLMI rabbits have features of fatty streaks, fibrous plaques, and fibroatheromatous plaques. Some plaques contain a lipid core and a thin fibrous cap similar to human vulnerable plaques. In spite of this, the plaque rupture is not observed in WHHLMI rabbits, suggesting that other additional factors such as mechanical stress are required to trigger the rupture. WHHLMI rabbits may become an important means for elucidating the possible mechanisms of plaque rupture by exposing the plaques to additional risk factors beyond hyperlipidemia.
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Affiliation(s)
- Masashi Shiomi
- Institute for Experimental Animals, Kobe University School of Medicine, Kobe, Hyogo, Japan.
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Johnson JL, Sala-Newby GB, Ismail Y, Aguilera CM, Newby AC. Low tissue inhibitor of metalloproteinases 3 and high matrix metalloproteinase 14 levels defines a subpopulation of highly invasive foam-cell macrophages. Arterioscler Thromb Vasc Biol 2008; 28:1647-53. [PMID: 18566294 DOI: 10.1161/atvbaha.108.170548] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE An excess of metalloproteinases (MMPs) over tissue inhibitors of metalloproteinases (TIMPs) may favor atherosclerotic plaque rupture. We compared TIMP levels in nonfoamy and foam-cell macrophages (FCM) generated in vivo. METHODS AND RESULTS In vivo generated rabbit FCM exhibited 84% reduced TIMP-3 protein compared to nonfoamy macrophages, and immunocytochemistry revealed a TIMP-3 negative subset (28%). Strikingly, only TIMP-3 negative FCM invaded a synthetic basement membrane, and invasion was inhibited by exogenous TIMP-3. TIMP-3 negative FCM also had increased proliferation and apoptosis rates compared to TIMP-3 positive cells, which were retarded by exogenous TIMP-3; this also reduced gelatinolytic activity. TIMP-3 negative FCM were found at the base of advanced rabbit plaques and in the rupture-prone shoulders of human plaques. To explain the actions of low TIMP-3 we observed a 26-fold increase in MT1-MMP (MMP-14) protein in FCM. Adding an MT1-MMP neutralizing antibody reduced foam-cell invasion, apoptosis, and gelatinolytic activity. Furthermore, MT1-MMP overexpressing and TIMP-3 negative FCM were found at the same locations in atherosclerotic plaques. CONCLUSIONS These results demonstrate that TIMP-3 is downregulated in a distinct subpopulation of FCM which have increased MMP-14. These cells are highly invasive and have increased proliferation and apoptosis, all properties expected to destabilise atherosclerotic plaques.
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Jeong MJ, Kim CS, Park JC, Kim HJ, Ko YM, Park KJ, Jeong SJ, Endou H, Kanai Y, Lim DS, Kim DK. Differential expression of system L amino acid transporters during wound healing process in the skin of young and old rats. Biol Pharm Bull 2008; 31:395-9. [PMID: 18310899 DOI: 10.1248/bpb.31.395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
UNLABELLED In order to elucidate the role of the system L-type amino acid transporters (LATs) in the wound healing process of aged and young subjects, we investigated the expression of LAT1, LAT2 and their subunit 4F2hc in the skin healing process after artificial wounds of dorsal skin in the young and old rats. METHODS The 1 cm full-thickness incisional wounds were made through the skin and panniculus carnosus muscle. The wounds were harvested at days 1, 3, 5 and 7 post-wounding, the experimental controls were harvested the skin of rat without wounds and the various analyses were performed. RESULTS In young rats, gradually and noticeable wound healing was detected, however, in old rats, wound healing was found to be greatly delayed. In young rats, the expression of LAT1 was increased rapidly on the day 1 after wound induction, on the other hand, in old rats, the expression of LAT1 after wound induction was not different from the control group. In young rats, the expression of LAT2 after the induction of wound was not different from the control group, however in old rats, the expression of LAT2 on the day 1 of wound induction was rapidly elevated. CONCLUSION These results suggest that the LAT1 and LAT2 increase in the wound healing process after cell injury in young and old rats, respectively.
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Affiliation(s)
- Moon-Jin Jeong
- Oral Biology Research Institute and The Second Stage of BK21, Chosun University College of Dentistry, 375 Seosukdong, Dong-gu, Gwangju 501-759, Korea
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Kim CS, Cho SH, Chun HS, Lee SY, Endou H, Kanai Y, Kim DK. BCH, an Inhibitor of System L Amino Acid Transporters, Induces Apoptosis in Cancer Cells. Biol Pharm Bull 2008; 31:1096-100. [DOI: 10.1248/bpb.31.1096] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Chun Sung Kim
- Department of Oral Physiology and The Second Stage of BK21, Chosun University College of Dentistry
| | - Seon-Ho Cho
- Department of Oral Physiology and The Second Stage of BK21, Chosun University College of Dentistry
| | - Hong Sung Chun
- Department of Biotechnology (BK21 Program), Chosun University
- Research Center for Proteineous Materials, Chosun University
| | - Sook-Young Lee
- Research Center for Proteineous Materials, Chosun University
| | - Hitoshi Endou
- Department of Pharmacology and Toxicology, Kyorin University School of Medicine
| | - Yoshikatsu Kanai
- Department of Pharmacology, Osaka University Graduate School of Medicine
| | - Do Kyung Kim
- Department of Oral Physiology and The Second Stage of BK21, Chosun University College of Dentistry
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