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Zhang Z, Lin W, Gan Q, Lei M, Gong B, Zhang C, Henrique JS, Han J, Tian H, Tao Q, Potempa LA, Stein TD, Emili A, Qiu WQ. The influences of ApoE isoforms on endothelial adherens junctions and actin cytoskeleton responding to mCRP. Angiogenesis 2024:10.1007/s10456-024-09946-4. [PMID: 39276310 DOI: 10.1007/s10456-024-09946-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Accepted: 08/23/2024] [Indexed: 09/16/2024]
Abstract
Apolipoprotein E4 (ApoE4) plays an important role responding to monomeric C-reactive protein (mCRP) via binding to CD31 leading to cerebrovascular damage and Alzheimer's disease (AD). Using phosphor-proteomic profiling, we found altered cytoskeleton proteins in the microvasculature of AD brains, including increased levels of hyperphosphorylated tau (pTau) and the actin-related protein, LIMA1. To address the hypothesis that cytoskeletal changes serve as early pathological signatures linked with CD31 in brain endothelia in ApoE4 carriers, ApoE4 knock-in mice intraperitoneal injected with mCRP revealed that mCRP increased the expressions of phosphorylated CD31 (pCD31) and LIMA1, and facilitate the binding of pCD31 to LIMA1. mCRP combined with recombinant APOE4 protein decreased interaction of CD31 and VE-Cadherin at adherens junctions (AJs), along with altered the expression of various actin cytoskeleton proteins, causing microvasculature damage. Notably, the APOE2 protein attenuated these changes. Overall, our study demonstrates that ApoE4 responds to mCRP to disrupt the endothelial AJs which link with the actin cytoskeleton and this pathway could play a key role in the barrier dysfunction leading to AD risk.
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Affiliation(s)
- Zhengrong Zhang
- Department of Pharmacology, Physiology and Biophysics, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA
| | - Weiwei Lin
- Department of Biochemistry, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA
| | - Qini Gan
- Department of Pharmacology, Physiology and Biophysics, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA
| | - Maohua Lei
- Department of Pharmacology, Physiology and Biophysics, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA
| | - Bin Gong
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Chao Zhang
- Section of Computational Biomedicine, Department of Medicine, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA
| | - Jessica Salles Henrique
- Department of Pharmacology, Physiology and Biophysics, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA
| | - Jingyan Han
- Section of Vascular Biology, Department of Medicine, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA
| | - Hua Tian
- Department of Pharmacology, Xiaman Medical College, Xiaman, China
| | - Qiushan Tao
- Department of Pharmacology, Physiology and Biophysics, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA
| | | | - Thor D Stein
- Department of Pathology and Laboratory Medicine, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA.
- Alzheimer's Disease Research Center, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA.
- VA Boston Healthcare System, Boston, MA02130, USA.
- VA Bedford Healthcare System, Bedford, MA01730, USA.
| | - Andrew Emili
- Department of Biochemistry, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA.
| | - Wei Qiao Qiu
- Department of Pharmacology, Physiology and Biophysics, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA.
- Alzheimer's Disease Research Center, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA.
- Department of Psychiatry, Boston University Chobanian & Avedisian School of Medicine, 72 East Concord Street, Boston, MA02118, USA.
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Condoleo V, Bonfrate L, Armentaro G, Pelaia C, Cassano V, De Marco M, Severini G, Pastura CA, Miceli S, Maio R, Perticone M, Arturi F, Sesti G, Sciacqua A. Effects of continuous positive airway pressure on comprehensive geriatric assessment and cognitive function in elderly patients with obstructive sleep apnea syndrome. Intern Emerg Med 2023; 18:769-779. [PMID: 36808594 DOI: 10.1007/s11739-023-03220-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 02/07/2023] [Indexed: 02/23/2023]
Abstract
Obstructive sleep apnea syndrome (OSAS) can lead to cognitive impairment and depression affecting memory, attention, and executive functions. Continuous positive airway pressure (CPAP) treatment seems to be able to revert changes in brain networks and neuropsychological tests correlated to OSAS. The aim of the present study was to evaluate the effects of a 6-month treatment with CPAP on functional, humoral and cognitive parameters in a cohort of elderly OSAS patients with several comorbidities. We enrolled 360 elderly patients suffering from moderate to severe OSAS and indication for nocturnal CPAP. At baseline the Comprehensive Geriatric Assessment (CGA) revealed a borderline Mini-Mental State Examination (MMSE) score that improved after 6-month treatment with CPAP (25.3 ± 1.6 vs 26 ± 1.5; p < 0.0001), as well as the Montreal Cognitive Assessment (MoCA) showed a mild improvement (24.4 ± 2.3 vs 26.2 ± 1.7; p < 0.0001). Moreover, functionality activities increased after treatment, as documented by a short physical performance battery (SPPB) (6.3 ± 1.5 vs 6.9 ± 1.4; p < 0.0001). Reduction of the Geriatric Depression Scale (GDS) from 6.0 ± 2.5 to 4.6 ± 2.2 (p < 0.0001) was also detected. Changes of homeostasis model assessment (HOMA) index, oxygen desaturation index (ODI), sleep-time spent with saturation below 90% (TC90), peripheral arterial oxyhaemoglobin saturation (SpO2), apnea-hypopnea index (AHI) and estimation of glomerular filtration rate (eGFR), contributed, respectively, to 27.9%, 9.0%, 2.8%, 2.3%, 1.7% and 0.9% of MMSE variability for a total of 44.6% of MMSE variations. GDS score changes were due to the improvement of AHI, ODI and TC90, respectively, for 19.2%, 4.9%, 4.2% of the GDS variability, cumulative responsible for 28.3% of GDS modifications. The present real-world study shows that CPAP treatment is able to improve cognition and depressive symptoms in OSAS elderly patients.
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Affiliation(s)
- Valentino Condoleo
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy
| | - Leonilde Bonfrate
- Clinica Medica "A. Murri", Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro, Bari, Italy
| | - Giuseppe Armentaro
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy.
| | - Corrado Pelaia
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy
| | - Velia Cassano
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy
| | - Mario De Marco
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy
| | - Giandomenico Severini
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy
| | - Carlo Alberto Pastura
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy
| | - Sofia Miceli
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy
| | - Raffaele Maio
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy
| | - Maria Perticone
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy
| | - Franco Arturi
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy
| | - Giorgio Sesti
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Angela Sciacqua
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Campus Universitario "S. Venuta", Viale Europa - Località Germaneto, 88100, Catanzaro, Italy
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Grudlewska-Buda K, Wiktorczyk-Kapischke N, Budzyńska A, Kwiecińska-Piróg J, Przekwas J, Kijewska A, Sabiniarz D, Gospodarek-Komkowska E, Skowron K. The Variable Nature of Vitamin C—Does It Help When Dealing with Coronavirus? Antioxidants (Basel) 2022; 11:antiox11071247. [PMID: 35883738 PMCID: PMC9312329 DOI: 10.3390/antiox11071247] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 02/06/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is still spreading worldwide. For this reason, new treatment methods are constantly being researched. Consequently, new and already-known preparations are being investigated to potentially reduce the severe course of coronavirus disease 2019 (COVID-19). SARS-CoV-2 infection induces the production of pro-inflammatory cytokines and acute serum biomarkers in the host organism. In addition to antiviral drugs, there are other substances being used in the treatment of COVID-19, e.g., those with antioxidant properties, such as vitamin C (VC). Exciting aspects of the use of VC in antiviral therapy are its antioxidant and pro-oxidative abilities. In this review, we summarized both the positive effects of using VC in treating infections caused by SARS-CoV-2 in the light of the available research. We have tried to answer the question as to whether the use of high doses of VC brings the expected benefits in the treatment of COVID-19 and whether such treatment is the correct therapeutic choice. Each case requires individual assessment to determine whether the positives outweigh the negatives, especially in the light of populational studies concerning the genetic differentiation of genes encoding the solute carriers responsible forVC adsorption. Few data are available on the influence of VC on the course of SARS-CoV-2 infection. Deducing from already-published data, high-dose intravenous vitamin C (HDIVC) does not significantly lower the mortality or length of hospitalization. However, some data prove, among other things, its impact on the serum levels of inflammatory markers. Finally, the non-positive effect of VC administration is mainly neutral, but the negative effect is that it can result in urinary stones or nephropathies.
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Affiliation(s)
- Katarzyna Grudlewska-Buda
- Department of Microbiology, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University in Toruń, 85-094 Bydgoszcz, Poland; (K.G.-B.); (N.W.-K.); (A.B.); (J.K.-P.); (J.P.); (E.G.-K.)
| | - Natalia Wiktorczyk-Kapischke
- Department of Microbiology, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University in Toruń, 85-094 Bydgoszcz, Poland; (K.G.-B.); (N.W.-K.); (A.B.); (J.K.-P.); (J.P.); (E.G.-K.)
| | - Anna Budzyńska
- Department of Microbiology, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University in Toruń, 85-094 Bydgoszcz, Poland; (K.G.-B.); (N.W.-K.); (A.B.); (J.K.-P.); (J.P.); (E.G.-K.)
| | - Joanna Kwiecińska-Piróg
- Department of Microbiology, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University in Toruń, 85-094 Bydgoszcz, Poland; (K.G.-B.); (N.W.-K.); (A.B.); (J.K.-P.); (J.P.); (E.G.-K.)
| | - Jana Przekwas
- Department of Microbiology, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University in Toruń, 85-094 Bydgoszcz, Poland; (K.G.-B.); (N.W.-K.); (A.B.); (J.K.-P.); (J.P.); (E.G.-K.)
| | - Agnieszka Kijewska
- Department of Immunobiology and Environmental Biology, Institute of Maritime and Tropical Medicine, Medical University of Gdansk, 80-211 Gdansk, Poland;
| | | | - Eugenia Gospodarek-Komkowska
- Department of Microbiology, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University in Toruń, 85-094 Bydgoszcz, Poland; (K.G.-B.); (N.W.-K.); (A.B.); (J.K.-P.); (J.P.); (E.G.-K.)
| | - Krzysztof Skowron
- Department of Microbiology, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University in Toruń, 85-094 Bydgoszcz, Poland; (K.G.-B.); (N.W.-K.); (A.B.); (J.K.-P.); (J.P.); (E.G.-K.)
- Correspondence: ; Tel.: +48-(52)-585-38-38
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LOX-1 is a poor prognostic indicator and induces epithelial-mesenchymal transition and metastasis in pancreatic cancer patients. Cell Oncol (Dordr) 2017; 41:73-84. [DOI: 10.1007/s13402-017-0360-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2017] [Indexed: 10/18/2022] Open
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Abstract
The role of statins in the protection of atherosclerosis and reducting cardiovascular (CV) events is well established. On the other hand, the role of inflammation in the propagation and propensity to CV events has also been demonstrated. High-sensitivity C-reactive protein (CRP) which is involved in the immunologic process of inflammation has received the interest for its use in screening and risk reclassification. However, evidence for its causal relationship with atherothrombosis is lacking, and even more, knowing that statins influence on the reduction of CRP levels, a relevant evidence of their clinical benefits in this regard is also lacking. This article reviews four different key points regarding the issue, to better understand the current state and application of the treatment with statins in order to achieve benefits from lowering CRP's levels regarding CV diseases: (1) the mechanisms of reduction of CRP levels by statins; (2) the role of statin-mediated CRP reduction in the atherosclerotic plaque regression; (3) the role in the prevention of CV diseases; and (4) the role in case of secondary prevention. With this basis, the reduction of CRP levels should be interpreted as a reduction of inflammatory burden thus its clinical benefits could be more interesting in secondary prevention. KEY MESSAGES It could be admitted a role of statin-mediated CRP diminution to reduce the rate of progression in atherosclerotic plaque. In general, and in the absence of specific clinical trials, the role of statins by lowering CRP and consequently, preventing cardiovascular events may be superior in case of secondary prevention because a more pronounced state of inflammation and regardless of its levels at baseline.
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Nogueira-Neto J, Cardoso ASC, Monteiro HP, Fonseca FLA, Ramos LR, Junqueira VBC, Simon KA. Basal neutrophil function in human aging: Implications in endothelial cell adhesion. Cell Biol Int 2016; 40:796-802. [PMID: 27109745 DOI: 10.1002/cbin.10618] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 04/21/2016] [Indexed: 01/28/2023]
Abstract
Much attention has been drawn to the pro-inflammatory condition that accompanies aging. This study compared parameters from non-stimulated neutrophils, obtained from young (18-30 years old [y.o.]) and elderly (65-80 y.o.) human volunteers. Measured as an inflammatory marker, plasmatic concentration of hs-CRP was found higher in elderly individuals. Non-stimulated neutrophil production of ROS and NO was, respectively, 38 and 29% higher for the aged group. From the adhesion molecules evaluated, only CD11b expression was elevated in neutrophils from the aged group, whereas no differences were found for CD11a, CD18, or CD62. A 69% higher non-stimulated in vitro neutrophil/endothelial cell adhesion was observed for neutrophils isolated from elderly donors. Our results suggest that with aging, neutrophils may be constitutively producing more reactive species in closer proximity to endothelial cells of vessel walls, which may both contribute to vascular damage and reflect a neutrophil intracellular disrupted redox balance, altering neutrophil function in aging.
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Affiliation(s)
- Joes Nogueira-Neto
- Department of Biological Sciences, Federal University of São Paulo, Diadema, SP, Brazil
| | - André S C Cardoso
- Department of Biological Sciences, Federal University of São Paulo, Diadema, SP, Brazil
| | - Hugo P Monteiro
- Department of Biochemistry/Molecular Biology, Federal University of São Paulo, São Paulo, SP, Brazil
| | - Fernando L A Fonseca
- Department of Biological Sciences, Federal University of São Paulo, Diadema, SP, Brazil.,Department of Hematology and Oncology, ABC School of Medicine, Santo André, SP, Brazil
| | - Luiz Roberto Ramos
- Department of Preventive Medicine, Federal University of São Paulo, São Paulo, SP, Brazil
| | | | - Karin A Simon
- Department of Biological Sciences, Federal University of São Paulo, Diadema, SP, Brazil.,Laboratório de Análises Clínicas e Toxicológicas, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Rua São Nicolau, 210-1° Andar, Diadema, 09913-030, SP, Brazil
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Lubrano V, Balzan S. Roles of LOX-1 in microvascular dysfunction. Microvasc Res 2016; 105:132-40. [PMID: 26907636 DOI: 10.1016/j.mvr.2016.02.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 02/17/2016] [Accepted: 02/17/2016] [Indexed: 10/22/2022]
Abstract
Studies from human and animal models with metabolic disease and hypertension highlight atrophic remodeling, reduced lumen size and thinner vascular walls of microvessels with profound density reduction. This impaired vascular response limits the perfusion of peripheral tissues inducing organ damage. These conditions are strongly associated with oxidative stress and in particular with the up-regulation of lectin-like oxidized low density lipoprotein receptor-1 (LOX-1). Several factors such as cytokines, shear stress, and advanced glycation end-products, especially oxLDL, can up-regulate LOX-1. The activation of this receptor induces the production of adhesion molecules, cytokines and the release of reactive oxygen species via NADPH oxidase. LOX-1 is considered a potent mediator of endothelial dysfunction and it is significantly associated with reduced microvascular endothelium NO-dependent vasodilation in hypercholesterolemia and hypertension. Microvascular endothelial cells increased the expression of IL-6 in association with the increased concentration of LDL and its degree of oxidation. Moreover, increased IL-6 levels are associated with up-regulation of LOX-1 in a dose-dependent manner. Another consequence of microvascular inflammation is the generation of small amounts of ROS, similar to those induced by low concentration of oxLDL (<5 μg/mL) which induces capillary tube formation of endothelial cells, through LOX-1 up-regulation. In light of its central role, LOX-1 represents an attractive therapeutic target for the treatment of human atherosclerotic diseases and microvascular disorders.
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Affiliation(s)
- Valter Lubrano
- Fondazione CNR/Regione Toscana G. Monasterio, Pisa, Italy.
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Adegunsoye A, Balachandran J. Inflammatory response mechanisms exacerbating hypoxemia in coexistent pulmonary fibrosis and sleep apnea. Mediators Inflamm 2015; 2015:510105. [PMID: 25944985 PMCID: PMC4402194 DOI: 10.1155/2015/510105] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 03/17/2015] [Indexed: 01/02/2023] Open
Abstract
Mediators of inflammation, oxidative stress, and chemoattractants drive the hypoxemic mechanisms that accompany pulmonary fibrosis. Patients with idiopathic pulmonary fibrosis commonly have obstructive sleep apnea, which potentiates the hypoxic stimuli for oxidative stress, culminating in systemic inflammation and generalized vascular endothelial damage. Comorbidities like pulmonary hypertension, obesity, gastroesophageal reflux disease, and hypoxic pulmonary vasoconstriction contribute to chronic hypoxemia leading to the release of proinflammatory cytokines that may propagate clinical deterioration and alter the pulmonary fibrotic pathway. Tissue inhibitor of metalloproteinase (TIMP-1), interleukin- (IL-) 1α, cytokine-induced neutrophil chemoattractant (CINC-1, CINC-2α/β), lipopolysaccharide induced CXC chemokine (LIX), monokine induced by gamma interferon (MIG-1), macrophage inflammatory protein- (MIP-) 1α, MIP-3α, and nuclear factor- (NF-) κB appear to mediate disease progression. Adipocytes may induce hypoxia inducible factor (HIF) 1α production; GERD is associated with increased levels of lactate dehydrogenase (LDH), alkaline phosphatase (ALP), and tumor necrosis factor alpha (TNF-α); pulmonary artery myocytes often exhibit increased cytosolic free Ca2+. Protein kinase C (PKC) mediated upregulation of TNF-α and IL-1β also occurs in the pulmonary arteries. Increased understanding of the inflammatory mechanisms driving hypoxemia in pulmonary fibrosis and obstructive sleep apnea may potentiate the identification of appropriate therapeutic targets for developing effective therapies.
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Affiliation(s)
- Ayodeji Adegunsoye
- Section of Pulmonary & Critical Care, Department of Medicine, University of Chicago, Chicago, IL 60637, USA
| | - Jay Balachandran
- Section of Pulmonary & Critical Care, Department of Medicine, University of Chicago, Chicago, IL 60637, USA
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Underlying inflammation has no impact on the oxidative stress response to acute mental stress. Brain Behav Immun 2014; 40:182-90. [PMID: 24675034 DOI: 10.1016/j.bbi.2014.03.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 03/06/2014] [Accepted: 03/13/2014] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION Mental stress is considered to be a trigger for acute myocardial infarction (MI), with inflammation thought to provide a mechanism. Inflammation is reciprocally linked to oxidative stress, which has also been implicated in MI. The purpose of this study was to assess the effects of experimentally-induced inflammation on the oxidative stress response to mental stress in healthy participants. METHODS Healthy males undertook one of two inflammatory stimuli: typhoid vaccination (Vaccination paradigm, N=17) or eccentric exercise (Eccentric exercise paradigm, N=17). All participants completed a mental arithmetic stress task twice (within-subject design): 6h after the inflammatory stimulus, and during a control non-inflammation condition. Blood samples were taken before, immediately and 30min after the stress task. Plasma was assessed for interleukin-6 (IL-6), protein carbonyls (PC), lipid hydroperoxides (LOOH), total antioxidant capacity (TAC) and nitric oxide metabolites (NOx). RESULTS Vaccination paradigm: IL-6, PC and NOx were significantly higher in the vaccination condition, relative to the control condition (p<.05). PC, TAC, LOOH and NOx were unchanged in response to mental stress in both the vaccination and control conditions. Eccentric Exercise paradigm: IL-6 and TAC were significantly higher in the eccentric exercise condition (p<.05), relative to the control condition. PC, TAC and NOx were unchanged in response to mental stress in both the eccentric exercise and control conditions. CONCLUSIONS Two different inflammatory paradigms were successful in increasing selective plasma markers of inflammation and oxidative stress prior to a mental stress task. However, experimentally induced transient inflammation had no impact on mental stress-induced changes in plasma LOOH, PC, TAC or NOx in young healthy participants.
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May A, Wang TJ. Evaluating the role of biomarkers for cardiovascular risk prediction: focus on CRP, BNP and urinary microalbumin. Expert Rev Mol Diagn 2014; 7:793-804. [DOI: 10.1586/14737159.7.6.793] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Abstract
Cardiovascular disease (CVD) is the leading cause of death globally. For close to four decades, we have known that high density lipoprotein (HDL) levels are inversely correlated with the risk of CVD. HDL is a complex particle that consists of proteins, phospholipids, and cholesterol and has the ability to carry micro-RNAs. HDL is constantly undergoing remodelling throughout its life-span and carries out many functions. This review summarizes many of the different aspects of HDL from its assembly, the receptors it interacts with, along with the functions it performs and how it can be altered in disease. While HDL is a key cholesterol efflux particle, this review highlights the many other important functions of HDL in the innate immune system and details the potential therapeutic uses of HDL outside of CVD.
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Associations between surface markers on blood monocytes and carotid atherosclerosis in HIV-positive individuals. Immunol Cell Biol 2013; 92:133-8. [PMID: 24296810 DOI: 10.1038/icb.2013.84] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Revised: 09/04/2013] [Accepted: 10/13/2013] [Indexed: 12/24/2022]
Abstract
Chronic HIV infection is associated with increased risk of cardiovascular disease (CVD), including in patients with virological suppression. Persistent innate immune activation may contribute to the development of CVD via activation of monocytes in these patients. We investigated whether changes in monocyte phenotype predict subclinical atherosclerosis in virologically suppressed HIV-positive individuals with low cardiovascular risk. We enroled 51 virologically suppressed HIV-positive individuals not receiving protease inhibitors or statins and 49 age-matched uninfected controls in this study. Carotid artery intima-media thickness (cIMT) was used as a surrogate marker for CVD, and traditional risk factors, including Framingham risk scores, were recorded. Markers of monocyte activation (CD14, CD16, CCR2, CX3CR1, CD38, HLA-DR and CD11b) were measured in whole-blood samples by flow cytometry. Associations were assessed using univariate and multivariate median regressions. Median cIMT was similar between HIV-positive and HIV-negative participants (P=0.3), although HIV-positive patients had significantly higher Framingham risk score (P=0.009) and systemic inflammation. Expression of two monocyte markers, CD11b and CX3CR1, independently predicted carotid artery thickness in HIV-positive individuals after controlling for Framingham risk score (P=0.025 and 0.015, respectively). These markers were not predictive of carotid artery thickening in controls. Our study indicates that monocyte surface markers may serve as novel predictors of CVD in HIV-positive individuals and is consistent with an important role for monocyte activation in the progression of HIV-related cardiovascular pathology.
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Woollard KJ, Rayment SJ, Bevan R, Shaw JA, Lunec J, Griffiths HR. α-Tocopherol supplementation does not affect monocyte endothelial adhesion or C-reactive protein levels but reduces soluble vascular adhesion molecule-1 in the plasma of healthy subjects. Redox Rep 2013; 11:214-22. [PMID: 17132270 DOI: 10.1179/135100006x116727] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Vascular monocyte retention in the subintima is pivotal to the development of cardiovascular disease and is facilitated by up-regulation of adhesion molecules on monocytes/endothelial cells during oxidative stress. Epidemiological studies have shown that cardiovascular disease risk is inversely proportional to plasma levels of the dietary micronutrients, vitamin C and vitamin E (alpha-tocopherol). We have tested the hypothesis that alpha-tocopherol supplementation may alter endothelial/monocyte function and interaction in subjects with normal ascorbate levels (> 50 microM), as ascorbate has been shown to regenerate tocopherol from its oxidised tocopheroxyl radical form in vitro. Healthy male subjects received alpha-tocopherol supplements (400 IU RRR-alpha-tocopherol/day for 6 weeks) in a placebo-controlled, double-blind intervention study. There were no significant differences in monocyte CD11b expression, monocyte adhesion to endothelial cells, plasma C-reactive protein or sICAM-1 concentrations post-supplementation. There was no evidence for nuclear translocation of NF-kappaB in isolated resting monocytes, nor any effect of alpha-tocopherol supplementation. However, post-supplementation, sVCAM-1 levels were decreased in all subjects and sE-selectin levels were increased in the vitamin C-replete group only; a weak positive correlation was observed between sE-selectin and alpha-tocopherol concentration. In conclusion, alpha-tocopherol supplementation had little effect on cardiovascular disease risk factors in healthy subjects and the effects of tocopherol were not consistently affected by plasma vitamin C concentration.
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Daulatzai MA. Neurotoxic Saboteurs: Straws that Break the Hippo’s (Hippocampus) Back Drive Cognitive Impairment and Alzheimer’s Disease. Neurotox Res 2013; 24:407-59. [DOI: 10.1007/s12640-013-9407-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 06/06/2013] [Accepted: 06/17/2013] [Indexed: 12/29/2022]
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Gao D, Pararasa C, Dunston CR, Bailey CJ, Griffiths HR. Palmitate promotes monocyte atherogenicity via de novo ceramide synthesis. Free Radic Biol Med 2012; 53:796-806. [PMID: 22640955 DOI: 10.1016/j.freeradbiomed.2012.05.026] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Revised: 04/30/2012] [Accepted: 05/15/2012] [Indexed: 11/21/2022]
Abstract
Elevated plasma free fatty acids (FAs) are associated with increased risk of cardiovascular disease. This study investigates the effects of the saturated FA palmitate and unsaturated FA oleate on monocyte phenotype and function. Incubation of human U937 and THP-1 monocytes with palmitate for 24h increased cell surface expression of integrin CD11b and scavenger receptor CD36 in a concentration-dependent manner with some decrease in mitochondrial reducing capacity at high concentration (300 μM). Monocytes incubated with palmitate, but not oleate, showed increased uptake of oxidized LDL and increased adhesion to rat aortic endothelium, particularly at bifurcations. The palmitate-induced increase in CD11b and CD36 expression was associated with increased cellular C16 ceramide and sphingomyelin, loss of reduced glutathione, and increased reactive oxygen species (ROS). Increased monocyte surface CD11b and CD36 was inhibited by fumonisin B1, an inhibitor of de novo ceramide synthesis, but not by the superoxide dismutase mimetic MnTBap. In contrast, MnTBap prevented the mitochondrial ROS increase and metabolic inhibition due to 300μM palmitate. This study demonstrates that in viable monocytes, palmitate but not oleate increases expression of surface CD11b and CD36. Palmitate increases monocyte adhesion to the aortic wall and promotes uptake of oxidized LDL and this involves de novo ceramide synthesis.
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Affiliation(s)
- Dan Gao
- School of Life and Health Sciences, Aston University, Birmingham B4 7ET, UK
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Quintessential Risk Factors: Their Role in Promoting Cognitive Dysfunction and Alzheimer’s Disease. Neurochem Res 2012; 37:2627-58. [DOI: 10.1007/s11064-012-0854-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Accepted: 07/21/2012] [Indexed: 12/13/2022]
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Etiopathogenetic mechanisms of pulmonary hypertension in sleep-related breathing disorders. Pulm Med 2012; 2012:273591. [PMID: 22848814 PMCID: PMC3401569 DOI: 10.1155/2012/273591] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 06/04/2012] [Indexed: 12/29/2022] Open
Abstract
Obstructive sleep apnea syndrome is a common disorder with significant health consequences and is on the rise in consonance with the obesity pandemic. In view of the association between sleep-disordered breathing and pulmonary hypertension as depicted by multiple studies, current clinical practice guidelines categorize obstructive sleep apnea as a risk factor for pulmonary hypertension and recommend an assessment for sleep disordered breathing in evaluating patients with pulmonary hypertension. The dysregulatory mechanisms associated with hypoxemic episodes observed in sleep related breathing disorders contribute to the onset of pulmonary hypertension and identification of these potentially treatable factors might help in the reduction of overall cardiovascular mortality.
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Ozari HO, Oktenli C, Celik S, Tangi F, Ipcioglu O, Terekeci HM, Top C, Uzun M, Sanisoglu YS, Nalbant S. Are increased carotid artery pulsatility and resistance indexes early signs of vascular abnormalities in young obese males? JOURNAL OF CLINICAL ULTRASOUND : JCU 2012; 40:335-340. [PMID: 22532370 DOI: 10.1002/jcu.21927] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Accepted: 03/19/2012] [Indexed: 05/31/2023]
Abstract
PURPOSE To provide insight into the factors by which obesity in itself may directly lead to early arterial damage, we aimed to determine early sonographic markers of obesity-related vascular dysfunction in young obese males. METHODS Thirty-five young obese males and 23 age-matched healthy male volunteers were recruited into the study. Common carotid artery pulsatility index and resistance index were calculated from blood flow velocities curves obtained by pulsed Doppler ultrasonography. RESULTS The mean pulsatility index, resistance index, body mass index, waist circumference, systolic and diastolic blood pressure, homeostasis model assessment for insulin resistance, plasma fasting glucose, insulin, C-peptide, triglycerides, low-density lipoprotein cholesterol, and high-sensitivity C-reactive protein were statistically higher in obese subjects than in healthy controls. CONCLUSIONS Our results suggest that depressed vessel compliance and increased vascular resistance are features of young, obese, normotensive subjects independently of and in addition to cardiovascular risk factors. As changes in arterial wall properties may be incipient in young obese subjects, future studies will be required to demonstrate whether early intervention such as diet and exercise in this population can improve vascular functions.
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Affiliation(s)
- H Onur Ozari
- Division of Internal Medicine, GATA Haydarpasa Training Hospital, Tibbiye Caddesi TR-34668 Uskudar-Istanbul, Turkey
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Pathogenesis of cognitive dysfunction in patients with obstructive sleep apnea: a hypothesis with emphasis on the nucleus tractus solitarius. SLEEP DISORDERS 2012; 2012:251096. [PMID: 23470865 PMCID: PMC3581091 DOI: 10.1155/2012/251096] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Revised: 12/13/2011] [Accepted: 12/22/2011] [Indexed: 02/06/2023]
Abstract
OSA is characterized by the quintessential triad of intermittent apnea, hypoxia, and hypoxemia due to pharyngeal collapse. This paper highlights the upstream mechanisms that may trigger cognitive decline in OSA. Three interrelated steps underpin cognitive dysfunction in OSA patients. First, several risk factors upregulate peripheral inflammation; these crucial factors promote neuroinflammation, cerebrovascular endothelial dysfunction, and oxidative stress in OSA. Secondly, the neuroinflammation exerts negative impact globally on the CNS, and thirdly, important foci in the neocortex and brainstem are rendered inflamed and dysfunctional. A strong link is known to exist between neuroinflammation and neurodegeneration. A unique perspective delineated here underscores the importance of dysfunctional brainstem nuclei in etiopathogenesis of cognitive decline in OSA patients. Nucleus tractus solitarius (NTS) is the central integration hub for afferents from upper airway (somatosensory/gustatory), respiratory, gastrointestinal, cardiovascular (baroreceptor and chemoreceptor) and other systems. The NTS has an essential role in sympathetic and parasympathetic systems also; it projects to most key brain regions and modulates numerous physiological functions. Inflamed and dysfunctional NTS and other key brainstem nuclei may play a pivotal role in triggering memory and cognitive dysfunction in OSA. Attenuation of upstream factors and amelioration of the NTS dysfunction remain important challenges.
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Cowan RE, Nash MS. Cardiovascular disease, SCI and exercise: unique risks and focused countermeasures. Disabil Rehabil 2011; 32:2228-36. [PMID: 20524925 DOI: 10.3109/09638288.2010.491579] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
PURPOSE To summarise the spinal cord injury (SCI) specific profile of three cardiovascular disease risk factors (CVD): fasting dyslipidaemia, postprandial lipidaemia and vascular inflammation and to summarise exercise prescriptions that may attenuate each. METHOD NA. RESULTS NA. CONCLUSIONS At least three CVD risk factors have unique profiles in the SCI population. Fasting dyslipidaemia is characterised in the SCI population by depressed HDL cholesterol and normal or low total cholesterol. In the post-prandial state, persons with SCI exhibit an exaggerated triglyceride rise and delayed clearance compared to non-disabled persons. Finally, vascular inflammation, as indexed by C-reactive protein, is markedly elevated in SCI. Exercise may improve each, although the specific prescriptions differs. Fasting dyslipidaemia responds to 8 weeks of moderate intensity aerobic exercise performed 5 days weekly for 30 min daily. Post-prandial lipaemia treatment requires daily moderate or vigorous aerobic exercise, as the effect dissipates day by day. The daily exercise duration is proportional to fitness level, with total caloric expenditure emphasised rather than time. Finally, attenuating vascular inflammation in non-disabled persons requires moderate or vigorous exercise performed for ≥12 months, 5 days weekly for ≥45 min; with aerobic exercise plus resistance training more effective than aerobic exercise alone.
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Affiliation(s)
- Rachel E Cowan
- Department of Neurological Surgery and the Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL 33136, USA
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Gonzales DA, De Torre C, Wang H, Devor CB, Munson PJ, Ying SX, Kern SJ, Petraitiene R, Levens DL, Walsh TJ, Suffredini AF. Protein expression profiles distinguish between experimental invasive pulmonary aspergillosis and Pseudomonas pneumonia. Proteomics 2011; 10:4270-80. [PMID: 21089047 DOI: 10.1002/pmic.200900768] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We hypothesized that invasive pulmonary aspergillosis (IPA) may generate a distinctive proteomic signature in plasma and bronchoalveolar lavage (BAL). Proteins in plasma and BAL from two neutropenic rabbit models of IPA and Pseudomonas pneumonia were analyzed by SELDI-TOF MS. Hierarchical clustering analysis of plasma time course spectra demonstrated two clusters of peaks that were differentially regulated between IPA and Pseudomonas pneumonia (57 and 34 peaks, respectively, p<0.001). PCA of plasma proteins demonstrated a time-dependent separation of the two infections. A random forest analysis that ranked the top 30 spectral points distinguished between late Aspergillus and Pseudomonas pneumonias with 100% sensitivity and specificity. Based on spectral data analysis, three proteins were identified using SDS-PAGE and LC/MS and quantified using reverse phase arrays. Differences in the temporal sequence of plasma haptoglobin (p<0.001), apolipoprotein A1 (p<0.001) and transthyretin (p<0.038) were observed between IPA and Pseudomonas pneumonia, as was C-reactive protein (p<0.001). In summary, proteomic analysis of plasma and BAL proteins of experimental Aspergillus and Pseudomonas pneumonias demonstrates unique protein profiles with principal components and spectral regions that are shared in early infection and diverge at later stages of infection. Haptoglobin, apolipoprotein A1, transthyretin, and C-reactive protein are differentially expressed in these infections suggesting important contributions to host defense against IPA.
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Affiliation(s)
- Denise A Gonzales
- Critical Care Medicine Department, Clinical Center, National Institutes of Health, Bethesda, MD 20892-1662, USA
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Eisenhardt SU, Habersberger J, Oliva K, Lancaster GI, Ayhan M, Woollard KJ, Bannasch H, Rice GE, Peter K. A proteomic analysis of C-reactive protein stimulated THP-1 monocytes. Proteome Sci 2011; 9:1. [PMID: 21219634 PMCID: PMC3023727 DOI: 10.1186/1477-5956-9-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Accepted: 01/10/2011] [Indexed: 01/27/2023] Open
Abstract
Background C-reactive protein (CRP) is a predictor of cardiovascular risk. It circulates as a pentameric protein in plasma. Recently, a potential dissociation mechanism from the disc-shaped pentameric CRP (pCRP) into single monomers (monomeric or mCRP) has been described. It has been shown that mCRP has strong pro-inflammatory effects on monocytes. To further define the role of mCRP in determining monocyte phenotype, the effects of CRP isoforms on THP-1 protein expression profiles were determined. The hypothesis to be tested was that mCRP induces specific changes in the protein expression profile of THP-1 cells that differ from that of pCRP. Methods Protein cell lysates from control and mCRP, pCRP or LPS-treated THP-1 cells were displayed using 2-dimensional SDS PAGE and compared. Differentially expressed proteins were identified by MALDI-TOF MS and confirmed by Western blotting. Results mCRP significantly up-regulates ubiquitin-activating enzyme E1, a member of the ubiquitin-proteasome system in THP-1 monocytes. Furthermore, HSP 70, alpha-actinin-4 (ACTN4) and alpha-enolase/enolase 1 were upregulated. The proteomic profile of LPS and pCRP treated monocytes differ significantly from that of mCRP. Conclusion The data obtained in this study support the hypothesis that isoform-specific effects of CRP may differentially regulate the phenotype of monocytes.
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Nash M, Dalal K, Martinez-Barrizonte J, Cardenas D. Suppression of Proatherogenic Inflammatory Cytokines as a Therapeutic Countermeasure to CVD Risks Accompanying SCI. Top Spinal Cord Inj Rehabil 2011. [DOI: 10.1310/sci1603-14] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Kälsch AI, Csernok E, Münch D, Birck R, Yard BA, Gross W, Kälsch T, Schmitt WH. Use of highly sensitive C-reactive protein for followup of Wegener's granulomatosis. J Rheumatol 2010; 37:2319-25. [PMID: 20716656 DOI: 10.3899/jrheum.100302] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Since Wegener's granulomatosis (WG) represents a relapsing disease, efforts have been made to reliably predict relapses using blood tests. Followup measures such as conventionally determined C-reactive protein (CRP), antineutrophil cytoplasmic antibody (C-ANCA) titer, and proteinase-3 (PR3) ELISA are applied. We evaluated whether during remission elevated highly sensitive CRP (hsCRP) precedes relapse as a marker of subclinical inflammation and thus might improve clinical assessment. METHODS We investigated 227 sera of 57 patients with WG: 74 sera collected from patients in remission who subsequently relapsed (before relapse), 30 sera collected during relapse, and 123 sera from patients in remission without relapse. We also distinguished between major and minor relapse. hsCRP, conventionally determined CRP (CRP), C-ANCA, PR3-ELISA, and erythrocyte sedimentation rate (ESR) were measured using commercial kits, and levels were correlated to clinical status. RESULTS Only hsCRP and ANCA titer, but not CRP levels, were higher in sera from patients who subsequently relapsed versus those who did not, indicating patients at risk. Levels of hsCRP, CRP, and ESR were higher in sera collected during relapse than in the sera before relapse. hsCRP, conventional CRP, and ESR were also higher in samples collected during major relapse than before major relapse. Looking at the levels just before relapse compared to previous levels during remission, none of these measures rose directly before the clinical manifestation of the relapse. CONCLUSION Our study provides evidence for an additional value of hsCRP in the clinical assessment of patients with WG.
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Affiliation(s)
- Anna-Isabelle Kälsch
- Fifth Medical Department, University Medical Centre Mannheim, Medical Faculty of Mannheim of the University of Heidelberg, Theodor-Kutzer-Ufer 1-3, D-68187 Mannheim, Germany.
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Liu N, Liu JT, Ji YY, Lu PP. C-reactive protein triggers inflammatory responses partly via TLR4/IRF3/NF-κB signaling pathway in rat vascular smooth muscle cells. Life Sci 2010; 87:367-74. [PMID: 20670634 DOI: 10.1016/j.lfs.2010.07.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Revised: 06/20/2010] [Accepted: 07/20/2010] [Indexed: 01/18/2023]
Abstract
AIMS C-reactive protein (CRP) plays an important role in the inflammatory process of atherosclerosis. Toll-like receptor 4 (TLR4) participates in atherogenesis by mediating the inflammatory responses. The aim of this experiment was to investigate the pro-inflammatory effects and mechanisms of CRP in rat vascular smooth muscle cells (VSMCs), especially focusing on the effects of CRP on IL-6 and peroxisome proliferator-activated receptor γ (PPARγ), and TLR4-dependent signal pathway. MAIN METHODS rat VSMCs were cultured, and CRP was used as a stimulant for IL-6 and peroxisome proliferator-activated receptor γ (PPARγ). IL-6 level in the culture supernatant was measured by ELISA, and mRNA and protein expressions were assayed by quantitative real-time PCR and western blot, respectively. RNA interference was used to assess the roles of TLR4 and interferon regulatory factor 3 (IRF3) in the pro-inflammatory signal pathway of CRP. KEY FINDINGS CRP stimulated IL-6 secretion, and inhibited mRNA and protein expression of PPARγ in VSMCs in a concentration-dependent manner. Additionally, CRP induced TLR4 expression, promoted nuclear translocation of NF-κB (p65), and augmented IκBα phosphorylation in VSMCs. Taken together, CRP induces the inflammatory responses through increasing IL-6 generation and reducing PPARγ expression in VSMCs, which is mediated by TLR4/IRF3/NF-κB signal pathway. SIGNIFICANCE CRP is able to stimulate IL-6 production and to inhibit PPARγ expression in VSMCs via MyD88-independent TLR4 signaling pathway (TLR4/IRF3/NF-κB). These provide the novel evidence for the pro-inflammatory action of CRP involved in atherogenesis.
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Affiliation(s)
- Na Liu
- Department of Pharmacology, Xi'an Jiaotong University School of Medicine, Xi'an 710061, China
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Psoriasis and systemic inflammatory diseases: potential mechanistic links between skin disease and co-morbid conditions. J Invest Dermatol 2010; 130:1785-96. [PMID: 20445552 DOI: 10.1038/jid.2010.103] [Citation(s) in RCA: 540] [Impact Index Per Article: 38.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Psoriasis is now classified as an immune-mediated inflammatory disease (IMID) of the skin. It is being recognized that patients with various IMIDs, including psoriasis, are at higher risk of developing "systemic" co-morbidities, e.g., cardiovascular disease (CVD), metabolic syndrome, and overt diabetes. In non-psoriatic individuals, the pathophysiology of obesity, aberrant adipocyte metabolism, diabetes, and CVDs involves immune-mediated or inflammatory pathways. IMIDs may impact these co-morbid conditions through shared genetic risks, common environmental factors, or common inflammatory pathways that are co-expressed in IMIDs and target organs. Given that pathogenic immune pathways in psoriasis are now well worked out and a large number of inflammatory mediators have been identified in skin lesions, in this review we will consider possible mechanistic links between skin inflammation and increased risks of (1) obesity or metabolic alterations and (2) CVD. In particular, we will discuss how well-established risk factors for CVD can originate from inflammation in other tissues.
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Nguyen QM, Srinivasan SR, Xu JH, Chen W, Berenson GS. Distribution and cardiovascular risk correlates of plasma soluble intercellular adhesion molecule-1 levels in asymptomatic young adults from a biracial community: the Bogalusa Heart Study. Ann Epidemiol 2010; 20:53-9. [PMID: 20006276 DOI: 10.1016/j.annepidem.2009.10.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Revised: 09/15/2009] [Accepted: 10/03/2009] [Indexed: 01/19/2023]
Abstract
PURPOSE That circulating soluble form of intercellular adhesion molecule-1 (sICAM-1) is associated with an increased risk for coronary artery disease is well recognized. However, information is scant regarding the distribution and cardiovascular (CV) risk correlates of sICAM-1 in asymptomatic young adults. METHODS Plasma sICAM-1 was measured in 1,184 black and white persons in the Bogalusa Heart Study cohort (70% white, 43% male), aged 24 to 44 years. CV risk was assessed in terms of CV risk factors, status of parental CV disease, and composite carotid intima-media thickness (IMT). RESULTS sICAM-1 levels displayed race difference (whites > blacks, p<0.0001), but no sex difference. In multivariate analysis including age, race, sex, smoking status, waist circumference, mean arterial pressure, low- and high-density lipoprotein (LDL and HDL) cholesterols, triglycerides, insulin resistance index, C-reactive protein (CRP), and adiponectin, the significant predictors of sICAM-1, in order of entry, were race (white > black), smoking, CRP, and waist circumference. Furthermore, there was a smoking by waist circumference interaction in that smoking attenuated the magnitude of correlation between waist circumference and sICAM-1. Levels of sICAM-1 adjusted for age, race, sex, and smoking increased with number of metabolic syndrome components (p for trend<0.01); positive family history of CV disease (p<0.05); and increased in composite carotid IMT specific for age, race, and sex (p for trend<0.05). CONCLUSION These findings underscore the potential value of plasma sICAM-1 as an additional biomarker for CV risk among asymptomatic young adults.
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Affiliation(s)
- Quoc Manh Nguyen
- Tulane Center for Cardiovascular Health, Tulane University Health Sciences Center, New Orleans, LA 70112, USA
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Wang Y, Bian ZM, Yu WZ, Yan Z, Chen WC, Li XX. Induction of interleukin-8 gene expression and protein secretion by C-reactive protein in ARPE-19 cells. Exp Eye Res 2010; 91:135-42. [PMID: 20188089 DOI: 10.1016/j.exer.2010.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2009] [Revised: 02/04/2010] [Accepted: 02/12/2010] [Indexed: 11/16/2022]
Abstract
C-reactive protein (CRP) is an acute phase reactant and its level rises rapidly during inflammation. Recent studies have suggested the potential involvement of CRP in the pathogenesis of age-related macular degeneration (AMD). To delineate the functional roles of CRP in inflammatory response by the ocular posterior segments, the effects of CRP on ARPE-19, an immortalized human retinal pigment epithelia (hRPE) cell line, were investigated in the present study. Treatment of ARPE-19 cells with CRP resulted in enhanced NF-kB nuclear translocation and dose-dependent transient induction of IL-8 mRNA synthesis and protein secretion. Stimulated expression of VEGF, but not MCP-1 by CRP was also observed. The induced IL-8 expression was transient and peaked at 12h post stimulation. In the presence of inhibitors for NF-kB, p38, MEK and JNK, the CRP-induced IL-8 production was abolished by 99.5+/-2.3, 97.8+/-2.1, 55.3+/-2.5 and 37.3+/-1.3%, respectively. Neutralization of Fc gamma receptors by anti-CD32 and CD64 antibodies produced 39.9+/-1.6 and 59.5+/-2.6% reduction, respectively, of CRP-stimulated IL-8 secretion, whereas that by anti-CD16 antibody had no effect. This study suggests that the pro-inflammatory effects of CRP in ARPE-19 cells may contribute to the inflammatory retinal diseases by induction of pro-inflammatory cytokines such as IL-8. This induction is mediated by NF-kB and multiple MAPK pathways through Fc gamma receptors.
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Affiliation(s)
- Yu Wang
- Department of Ophthalmology, People's Hospital of Peking University, Beijing 100044, China
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Suppression of Plasmodium cynomolgi in rhesus macaques by coinfection with Babesia microti. Infect Immun 2010; 78:1032-9. [PMID: 20048045 DOI: 10.1128/iai.00921-09] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Both Plasmodium and Babesia species are intraerythrocytic protozoans that infect a wide range of hosts, including humans, and they elicit similar inflammatory responses and clinical manifestations that differ markedly in severity. We recently reported that a rhesus macaque that was chronically infected with Babesia microti was able to control infection with Plasmodium cynomolgi (a parasite of macaques with characteristics very similar to those of Plasmodium vivax) better than naïve monkeys. To confirm this and to investigate the underlying immunopathology, six naïve rhesus monkeys were infected with B. microti. After 24 days, four of these monkeys and four naïve rhesus monkeys were challenged with P. cynomolgi blood-stage parasites. B. microti persisted at low levels in all monkeys, and the clinical parameters were comparable to those of noninfected controls. There was a significant decrease in P. cynomolgi parasitemia in animals coinfected with B. microti compared to the parasitemia in animals infected with P. cynomolgi alone. This decrease in P. cynomolgi parasitemia correlated with increases in the levels of proinflammatory monocytes at the time of P. cynomolgi infection and with higher C-reactive protein (CRP) serum levels 1 week after malaria infection. Therefore, we conclude that ongoing infection with B. microti parasites leads to suppression of malaria infection.
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Palmitate induces CD11b expression in monocytes independent of altered redox state. Proc Nutr Soc 2010. [DOI: 10.1017/s0029665110003290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Eisenhardt SU, Habersberger J, Peter K. Monomeric C-Reactive Protein Generation on Activated Platelets: The Missing Link Between Inflammation and Atherothrombotic Risk. Trends Cardiovasc Med 2009; 19:232-7. [DOI: 10.1016/j.tcm.2010.02.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Mennander A, Kuukasjärvi P, Laurikka J, Nikus K, Karhunen PJ, Tarkka M, Lehtimäki T. Diagnostic performance of plasma high sensitive C‐reactive protein in detecting three‐vessel coronary artery disease: modification by apolipoprotein E genotype. Scandinavian Journal of Clinical and Laboratory Investigation 2009; 68:714-9. [DOI: 10.1080/00365510802172145] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Ari Mennander
- Heart Center, Tampere University Hospital and Tampere University Medical School, Tampere, Finland
| | - Pekka Kuukasjärvi
- Heart Center, Tampere University Hospital and Tampere University Medical School, Tampere, Finland
| | - Jari Laurikka
- Heart Center, Tampere University Hospital and Tampere University Medical School, Tampere, Finland
| | - Kjell Nikus
- Heart Center, Tampere University Hospital and Tampere University Medical School, Tampere, Finland
| | - Pekka J. Karhunen
- Department of Forensic Medicine, Tampere University Medical School and Research Unit of Centre for Laboratory Medicine, Tampere University Hospital, Tampere, Finland
| | - Matti Tarkka
- Heart Center, Tampere University Hospital and Tampere University Medical School, Tampere, Finland
| | - Terho Lehtimäki
- Laboratory of Atherosclerosis Genetics, Department of Clinical Chemistry, Tampere University Hospital and Tampere University Medical School, Tampere, Finland
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Butt M, Dwivedi G, Khair O, Lip GYH. Obstructive sleep apnea and cardiovascular disease. Int J Cardiol 2009; 139:7-16. [PMID: 19505734 DOI: 10.1016/j.ijcard.2009.05.021] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2009] [Revised: 05/07/2009] [Accepted: 05/11/2009] [Indexed: 01/25/2023]
Abstract
Obstructive sleep apnea (OSA) is a common yet an under-diagnosed sleep related breathing disorder affecting predominantly middle-aged men. OSA is associated with many adverse health outcomes, including cardiovascular disease. Common OSA associated/induced cardiovascular disorders include coronary artery disease, heart failure, hypertension, cardiac arrhythmias and stroke, which further increase morbidity and mortality in the OSA population. Endothelial dysfunction, coagulopathy, impaired sympathetic drive, oxidative and inflammatory stress are the pathophysiological pathways suggested for the development of cardiovascular disease in OSA. The evidence would suggest that OSA should be considered as a cardiovascular risk factor, and is a treatable condition. Multiple studies using Continuous Positive Airway Pressure (CPAP) have shown improvements in the clinical state as well as retardation of disease progression. Therefore, patients with cardiovascular disease should be proactively screened for OSA and vice versa.
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Affiliation(s)
- Mehmood Butt
- University Department of Medicine, City Hospital, Birmingham B18 7QH, UK
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Abstract
BACKGROUND Inflammation is pivotal in all phases of atherosclerosis. Among the numerous inflammatory biomarkers, the largest amount of published data supports a role for C-reactive protein (CRP) as a robust and independent risk marker in the prediction of primary and secondary adverse cardiovascular events. In addition to being a risk marker, there is much evidence indicating that CRP may indeed participate in atherogenesis. CONTENT In this review, we focus on the role of CRP in promoting atherothrombosis by discussing its effects on endothelial cells, endothelial progenitor cells, monocyte-macrophages, and smooth muscle cells. CONCLUSIONS CRP is clearly a risk marker for cardiovascular disease and is recommended for use in primary prevention. In addition, CRP appears also to contribute to atherogenesis. However, much further research is needed, especially in appropriate animal models, to confirm the possible role of CRP in promoting atherothrombosis.
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Affiliation(s)
- Sridevi Devaraj
- Laboratory for Atherosclerosis and Metabolic Research, University of California–Davis Medical Center, Sacramento, CA
| | - Uma Singh
- Laboratory for Atherosclerosis and Metabolic Research, University of California–Davis Medical Center, Sacramento, CA
| | - Ishwarlal Jialal
- Laboratory for Atherosclerosis and Metabolic Research, University of California–Davis Medical Center, Sacramento, CA
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Nash M, Mendez A. Nonfasting Lipemia and Inflammation as Cardiovascular Disease Risks After SCI. Top Spinal Cord Inj Rehabil 2009. [DOI: 10.1310/sci1403-15] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Nakajima F, Nishimura M, Hashimoto S, Okazaki H, Tadokoro K. Role of anti-Nakaantibody, monocytes and platelets in the development of transfusion-related acute lung injury. Vox Sang 2008; 95:318-23. [DOI: 10.1111/j.1423-0410.2008.01095.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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Montecucco F, Mach F. New evidences for C-reactive protein (CRP) deposits in the arterial intima as a cardiovascular risk factor. Clin Interv Aging 2008; 3:341-9. [PMID: 18686755 PMCID: PMC2546477 DOI: 10.2147/cia.s2706] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Inflammatory processes are orchestrated by several soluble molecules, which interact with cell populations involved. Cytokines, chemokines, acute-phase reactants, and hormones are crucial in the evolution of several inflammatory disorders, such as atherosclerosis. Several evidences suggest that C-reactive protein (CRP) started to be considered as a cardiovascular risk factor, since CRP directly induces atheroslerosis development. The recent demonstration of CRP production not only by the liver, but also within atherosclerotic plaques by activated vascular cells, also suggests a possible dual role, as both a systemic and tissue agent. Although more studies are needed, some therapeutic approaches to reduce CRP levels have been performed with encouraging results. However, given the strong limitations represented by its low specificity and still accordingly with the American Heart Association, there is no need for high sensitivity CRP screening of the entire adult population as a public-health measure. The measure of serum CRP might be useful only for patients who are considered at intermediate risk.
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Affiliation(s)
- Fabrizio Montecucco
- Division of Cardiology, Foundation for Medical Research, University Hospital, Geneva, Switzerland
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Woollard KJ, Suhartoyo A, Harris EE, Eisenhardt SU, Jackson SP, Peter K, Dart AM, Hickey MJ, Chin-Dusting JPF. Pathophysiological levels of soluble P-selectin mediate adhesion of leukocytes to the endothelium through Mac-1 activation. Circ Res 2008; 103:1128-38. [PMID: 18818407 DOI: 10.1161/circresaha.108.180273] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Plasma soluble P-selectin (sP-selectin) levels are increased in pathologies associated with atherosclerosis, including peripheral arterial occlusive disease (PAOD). However, the role of sP-selectin in regulating leukocyte-endothelial adhesion is unclear. The aim of this study was to assess the ability of exogenous and endogenous sP-selectin to induce leukocyte responses that promote their adhesion to various forms of endothelium. In flow chamber assays, sP-selectin dose-dependently increased neutrophil adhesion to resting human iliac artery endothelial cells. Similarly, sP-selectin induced neutrophil adhesion to the endothelial surface of murine aortae and human radial venous segments in ex vivo flow chamber experiments. Using intravital microscopy to examine postcapillary venules in the mouse cremaster muscle, in vivo administration of sP-selectin was also found to significantly increase leukocyte rolling and adhesion in unstimulated postcapillary venules. Using a Mac-1-specific antibody and P-selectin knockout mouse, it was demonstrated that this finding was dependent on a contribution of Mac-1 to leukocyte rolling and endothelial P-selectin expression. This was confirmed in an ex vivo perfusion model using viable mouse aorta and human radial vessels. In contrast, with tumor necrosis factor-alpha-activated endothelial cells and intact endothelium, where neutrophil adhesion was already elevated, sP-selectin failed to further increase adhesion. Plasma samples from PAOD patients containing pathologically elevated concentrations of sP-selectin also increased neutrophil adhesion to the endothelium in a sP-selectin-dependent manner, as demonstrated by immunodepletion of sP-selectin. These studies demonstrate that raised plasma sP-selectin may influence the early progression of vascular disease by promoting leukocyte adhesion to the endothelium in PAOD, through Mac-1-mediated rolling and dependent on endothelial P-selectin expression.
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Affiliation(s)
- Kevin J Woollard
- Baker IDI Heart and Diabetes Institute, 75 Commercial Rd, Melbourne, 3004, Australia.
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39
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Maingrette F, Li L, Renier G. C-reactive protein enhances macrophage lipoprotein lipase expression. J Lipid Res 2008; 49:1926-35. [DOI: 10.1194/jlr.m800024-jlr200] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Kim K, Valentine RJ, Shin Y, Gong K. Associations of visceral adiposity and exercise participation with C-reactive protein, insulin resistance, and endothelial dysfunction in Korean healthy adults. Metabolism 2008; 57:1181-9. [PMID: 18702942 DOI: 10.1016/j.metabol.2008.04.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2006] [Accepted: 04/22/2008] [Indexed: 11/24/2022]
Abstract
The aim of the current study was to examine the associations of visceral adiposity and exercise participation with C-reactive protein (CRP), insulin resistance, and endothelial dysfunction in Korean adults selected from the general population. We studied 160 Korean adults (aged 41.3 +/- 13.0 years; n = 38 men and n = 122 women) who volunteered in a health promotion program. Subjects were divided into 2 groups based upon spontaneous exercise participation for using a cross-sectional approach. We measured anthropometric factors (body mass index [BMI], percentage body fat, waist-hip ratio [WHR], and abdominal fat area by computed tomographic scanning), blood pressure (BP), blood levels of glucose, lipids, fibrinogen, CRP, leptin, hemoglobin A(1c), homeostasis model assessment (HOMA), and carotid intima media thickness (IMT; via ultrasonography). Associations among the variables were assessed by Pearson partial correlation and linear regression, controlling for age and sex. Independent t tests were used to assess differences between exercise participants and nonparticipants. Significance was accepted at P < .05. As expected, the measures of adiposity (BMI, percentage body fat, WHR, abdominal fat area) were highly correlated with each other (r = .49-.86, P < .01). Blood levels of high-sensitivity CRP (hsCRP), leptin, and HOMA were modestly correlated with all measures of adiposity. Visceral fat area was the most important predictor of hsCRP, explaining 19.6% of the variance using stepwise linear regression analysis (P < .01). As visceral fat area tertiles increased from low to high, a significant stepwise increment in blood levels of CRP (P < .001), HOMA (P = .005), and left carotid IMT (P = .035) was observed. However, hsCRP and HOMA were not significantly different when compared across whole-body fat tertiles. Systolic BP, diastolic BP, and left carotid IMT were modestly correlated with WHR and visceral fat area (P < .05); but systolic BP and diastolic BP were also correlated with BMI and percentage body fat (P < .05). Therefore, the relative importance of central adiposity as opposed to total body fatness in endothelial dysfunction is unclear. Compared with the nonexercise group, exercise participants had significantly lower (P < .05) WHR, visceral fat area, ratio of visceral fat area to subcutaneous area, hsCRP, hemoglobin A(1c), and HOMA, with no significant differences in BMI, percentage body fat, and physical fitness. Central obesity with high visceral fat is strongly associated with blood level of hsCRP, insulin resistance, and endothelial dysfunction-related factors in healthy Korean adults. In addition, exercise participation, even in the absence of difference in physical fitness, may be protective against development of central obesity and insulin resistance in this understudied Korean population.
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Affiliation(s)
- Kijin Kim
- Department of Physical Education, College of Physical Education, Keimyung University, Daegu 704-701, South Korea.
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41
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Murphy AJ, Woollard KJ, Hoang A, Mukhamedova N, Stirzaker RA, McCormick SPA, Remaley AT, Sviridov D, Chin-Dusting J. High-density lipoprotein reduces the human monocyte inflammatory response. Arterioscler Thromb Vasc Biol 2008; 28:2071-7. [PMID: 18617650 DOI: 10.1161/atvbaha.108.168690] [Citation(s) in RCA: 352] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Whereas the anti-inflammatory effects of high-density lipoprotein (HDL) on endothelial cells are well described, such effects on monocytes are less studied. METHODS AND RESULTS Human monocytes were isolated from whole blood followed by assessment of CD11b activation/expression and cell adhesion under shear-flow. HDL caused a dose-dependent reduction in the activation of CD11b induced by PMA or receptor-dependent agonists. The constituent of HDL responsible for the antiinflammatory effects on CD11b activation was found to be apolipoprotein A-I (apoA-I). Cyclodextrin, but not cyclodextrin/cholesterol complex, also inhibited PMA-induced CD11b activation implicating cholesterol efflux as the main mechanism. This was further confirmed with the demonstration that cholesterol content of lipid rafts diminished after treatment with the cholesterol acceptors. Blocking ABCA1 with an anti-ABCA1 antibody abolished the effect of apoA-I. Furthermore, monocytes derived from a Tangier disease patient definitively confirmed the requirement of ABCA1 in apoA-I-mediated CD11b inhibition. The antiinflammatory effects of apoA-I were also observed in functional models including cell adhesion to an endothelial cell monolayer, monocytic spreading under shear flow, and transmigration. CONCLUSIONS HDL and apoA-I exhibit an antiinflammatory effect on human monocytes by inhibiting activation of CD11b. ApoA-I acts through ABCA1, whereas HDL may act through several receptors.
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Affiliation(s)
- Andrew J Murphy
- Laboratories of Vascular Pharmacology, Research Institute, Melbourne, Victoria, Australia
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42
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Montecucco F, Steffens S, Burger F, Pelli G, Monaco C, Mach F. C-reactive protein (CRP) induces chemokine secretion via CD11b/ICAM-1 interaction in human adherent monocytes. J Leukoc Biol 2008; 84:1109-19. [PMID: 18591415 DOI: 10.1189/jlb.0208123] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Several studies support C-reactive protein (CRP) as a systemic cardiovascular risk factor. The recent detection of CRP in arterial intima suggests a dual activity in atherosclerosis as a circulating and tissue mediator on vascular and immune cells. In the present paper, we focused on the inflammatory effects of CRP on human monocytes, which were isolated by Ficoll-Percoll gradients and cultured in adherence to polystyrene, endothelial cell monolayer, or in suspension. Chemokine levels, adhesion molecule, and chemokine receptor expression were detected by ELISA, flow cytometry, and real-time RT-PCR. Migration assays were performed in a Boyden chamber. Stimulation with CRP induced release of CCL2, CCL3, and CCL4 in adherent monocytes through the binding to CD32a, CD32b, and CD64, whereas no effect was observed in suspension culture. This was associated with CRP-induced up-regulation of adhesion molecules membrane-activated complex 1 (Mac-1) and ICAM-1 on adherent monocytes. Blockade of Mac-1/ICAM-1 interaction inhibited the CRP-induced chemokine secretion. In addition, CRP reduced mRNA and surface expression of corresponding chemokine receptors CCR1, CCR2, and CCR5 in adherent monocytes. This effect was a result of chemokine secretion, as coincubation with neutralizing anti-CCL2, anti-CCL3, and anti-CCL4 antibodies reversed the effect of CRP. Accordingly, a reduced migration of CRP-treated monocytes to CCL2 and CCL3 was observed. In conclusion, our data suggest an in vitro model to study CRP activities in adherent and suspension human monocytes. CRP-mediated induction of adhesion molecules and a decrease of chemokine receptors on adherent monocytes might contribute to the retention of monocytes within atherosclerotic lesions and recruitment of other circulating cells.
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Affiliation(s)
- Fabrizio Montecucco
- Department of Cardiology, University Hospital Geneva, 1211 Geneva, Switzerland
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43
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44
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Hoang A, Murphy AJ, Coughlan MT, Thomas MC, Forbes JM, O'Brien R, Cooper ME, Chin-Dusting JPF, Sviridov D. Advanced glycation of apolipoprotein A-I impairs its anti-atherogenic properties. Diabetologia 2007; 50:1770-9. [PMID: 17579831 DOI: 10.1007/s00125-007-0718-9] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2007] [Accepted: 05/08/2007] [Indexed: 12/16/2022]
Abstract
AIMS/HYPOTHESIS AGE contribute to the pathogenesis of diabetic complications, including dyslipidaemia and atherosclerosis. However, the precise mechanisms remain to be established. In the present study, we examined whether AGE modification of apolipoprotein A-I (apoA-I) affects its functionality, thus altering its cardioprotective profile. MATERIALS AND METHODS The ability of AGE-modified apoA-I to facilitate cholesterol and phospholipid efflux, stabilise ATP-binding cassette transporter A1 (ABCA1) and inhibit expression of adhesion molecules in human macrophages and monocytes was studied. RESULTS The ability of AGE-modified apoA-I to promote cholesterol efflux from THP-1 macrophages, isolated human monocytes and from ABCA1-transfected HeLa cells was significantly reduced (>70%) compared with unmodified apoA-I. This effect was reversed by preventing AGE formation with aminoguanidine or reversing AGE modification using the cross-link breaker alagebrium chloride. AGE-modification of HDL also reduced its capacity to promote cholesterol efflux. AGE-apoA-I was also less effective than apoA-I in stabilising ABCA1 in THP-1 cells as well as in inhibiting expression of CD11b in human monocytes. CONCLUSIONS/INTERPRETATION AGE modification of apoA-I considerably impairs its cardioprotective, antiatherogenic properties, including the ability to promote cholesterol efflux, stabilise ABCA1 and inhibit the expression of adhesion molecules. These findings provide a rationale for targeting AGE in the management of diabetic dyslipidaemia.
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Affiliation(s)
- A Hoang
- Baker Heart Research Institute, St Kilda Road Central, Melbourne, Victoria 8008, Australia
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45
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Duggan E, O'Dwyer MJ, Caraher E, Diviney D, McGovern E, Kelleher D, McManus R, Ryan T. Coagulopathy after cardiac surgery may be influenced by a functional plasminogen activator inhibitor polymorphism. Anesth Analg 2007; 104:1343-7, table of contents. [PMID: 17513622 DOI: 10.1213/01.ane.0000261267.28891.00] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Cytokine-mediated inflammation and coagulopathy may occur after cardiac surgery. In this study we investigated the temporal pattern of plasminogen activator inhibitor-1 (PAI-1) gene expression after cardiac surgery and its relation with PAI genotype, and obtained preliminary data regarding its relation to perioperative morbidity. METHODS The relative change in PAI-1 mRNA 1, 6, and 24 h after cardiopulmonary bypass (CPB) was measured from mononuclear cells in 82 patients undergoing elective cardiac surgery. DNA was analyzed for carriage of the 4G/5G PAI-1 polymorphism. RESULTS PAI-1 gene expression decreased after CPB in all patients. A larger reduction in PAI-1 gene expression was observed in homozygous carriers of the 5G allele. Homozygous carriers of the 5G allele were also more likely to receive transfusion of coagulation blood products. There was no relation between change in PAI-1 gene expression and duration of CPB. CONCLUSIONS PAI-1 gene expression decreased over time after CPB. We found a link between PAI-1 genotype, PAI gene expression, and transfusion of coagulation products after cardiac surgery.
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Affiliation(s)
- Edel Duggan
- Department of Anaesthesia, Trinity Centre for Health Sciences, St. James's Hospital, Dublin, Ireland
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46
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Ansar W, Bandyopadhyay SMN, Chowdhury S, Habib SH, Mandal C. Role of C-reactive protein in complement-mediated hemolysis in Malaria. Glycoconj J 2007; 23:233-40. [PMID: 16691506 DOI: 10.1007/s10719-006-7928-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Human C-reactive protein (CRP) is a clinically important classical acute phase protein. Although CRP has been reported to bind with many nucleated cells, the direct binding of CRP to erythrocytes in diseases remains largely unexplored. The main focus of the present study was to investigate the binding of disease-specific CRP to erythrocytes of same patients. Distinct molecular variant of disease-specific CRP was affinity purified from sera of malaria patients (CRP(Mal)). This CRP showed strong binding with malaria erythrocytes (RBC(Mal)) as confirmed by flow cytometric analysis (FACS), enzyme-linked immunosorbent assays (ELISA), and radio binding assays. Calcium and phosphoryl choline (PC) were found to be essential for this interaction. A 2.3-fold increased binding of induced CRP to RBC(Mal) as compared to normal erythrocytes (RBC(N)) confirmed disease-specificity. Preincubation of RBC(Mal) with unconjugated CRP showed 3-5 fold inhibition. The association constant of CRP and RBC(Mal) was 4.7 x 10(6) cpm/microg with the corresponding number of receptors/cell being 4.3 x 10(5). The effector function of CRP(Mal) has been demonstrated by its potency to activate the complement pathway. An optimal dose of 10 microg/ml of CRP induced three-fold higher hemolysis of patient erythrocytes as compared to RBC(N). These studies provide direct evidence for an important phagocytic functional interaction of this acute-phase protein by triggering the CRP-complement pathway after the binding of CRP(Mal) with RBC(Mal). Hemolysis as triggered by this pathway may be one of the causative factors of anemia, a common clinical manifestation of this disease.
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Affiliation(s)
- Waliza Ansar
- Immunobiology Division, Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata, 700 032, India
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Nishimura M, Hashimoto S, Takanashi M, Okazaki H, Satake M, Nakajima K. Role of anti-human leucocyte antigen class II alloantibody and monocytes in development of transfusion-related acute lung injury. Transfus Med 2007; 17:129-34. [PMID: 17430469 DOI: 10.1111/j.1365-3148.2006.00721.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Recently, evidence implicating the roles of the anti-human leucocyte antigen (HLA) class II antibody in the development of transfusion-related acute lung injury (TRALI), which is one of the most serious possible side effects of transfusion, has been accumulating. The aim of this study is to clarify the roles of the anti-HLA DR alloantibody in TRALI development. Cultured human lung microvascular endothelial (LME) cells were incubated with either HLA-DR15-positive or HLA-DR15-negative monocytes together with serum from a single multiparous donor previously implicated in a clinical case of TRALI and known to contain anti-HLA DR15 antibody. Production of soluble leukotriene B(4) (LTB(4)) was measured in the supernatant and found to be markedly increased in the presence of HLA-DR15-positive monocytes but not with the HLA-DR15-negative monocytes or in the absence of LME cells. The vascular cell adhesion molecule-1 expression in LME cells and leucocyte-function-associated molecule-1 (LFA-1) expression in HLA-DR15-positive monocytes were notably enhanced after combined culture of LME cells, HLA-DR15-positive monocytes and TRALI-inducing anti-HLA DR15 antibody-positive serum. In conclusion, anti-HLA DR alloantibodies may be implicated in LME dysfunction that leads to TRALI, in a monocyte-dependent manner.
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Affiliation(s)
- M Nishimura
- Research Section, Tokyo Metropolitan Red Cross Blood Center, Tokyo, Japan.
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Sjöwall C, Wetterö J. Pathogenic implications for autoantibodies against C-reactive protein and other acute phase proteins. Clin Chim Acta 2007; 378:13-23. [PMID: 17239838 DOI: 10.1016/j.cca.2006.12.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2006] [Revised: 11/29/2006] [Accepted: 12/05/2006] [Indexed: 12/21/2022]
Abstract
Systemic lupus erythematosus (SLE) is a systemic rheumatic disease characterized clinically by multiorgan involvement and serologically by the occurrence of antinuclear antibodies. SLE patients may present with multiple autoantibodies to cytoplasmic and cell surface antigens as well as to circulating plasma proteins. Another feature of SLE is that serum levels of C-reactive protein (CRP) often remain low despite high disease activity and despite high levels of other acute phase proteins and interleukin-6, i.e. the main CRP inducing cytokine. Apart from its important role as a laboratory marker of inflammation, CRP attracts increasing interest due to its many intriguing biological functions, one of which is a role as an opsonin contributing to the elimination of apoptotic cell debris, e.g. nucleosomes, thereby preventing immunization against autoantigens. Recently, autoantibodies against CRP and other acute phase proteins have been reported in certain rheumatic conditions, including SLE. Although the presence of anti-CRP autoantibodies does not explain the failed CRP response in SLE, antibodies directed against acute phase proteins have several implications of pathogenetic interest. This paper thus highlights the biological and clinical aspects of native and monomeric CRP and anti-CRP, as well as autoantibodies against mannose-binding lectin, serum amyloid A and serum amyloid P component.
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Affiliation(s)
- Christopher Sjöwall
- Division of Rheumatology/Autoimmunity and Immune Regulation Unit (AIR), Department of Molecular and Clinical Medicine, Linköping University, SE-581 85 Linköping, Sweden.
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Chapple ILC, Matthews JB. The role of reactive oxygen and antioxidant species in periodontal tissue destruction. Periodontol 2000 2007; 43:160-232. [PMID: 17214840 DOI: 10.1111/j.1600-0757.2006.00178.x] [Citation(s) in RCA: 524] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Iain L C Chapple
- Unit of Periodontology, The University of Birmingham School of Dentistry, Birmingham, UK
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50
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Tremblay J. Genetic determinants of C-reactive protein levels in metabolic syndrome: a role for the adrenergic system? J Hypertens 2007; 25:281-3. [PMID: 17211232 DOI: 10.1097/hjh.0b013e328013dc13] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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