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Wu X, Yuan C, Pan J, Zhou Y, Pan X, Kang J, Ren L, Gong L, Li Y. CXCL9, IL2RB, and SPP1, potential diagnostic biomarkers in the co-morbidity pattern of atherosclerosis and non-alcoholic steatohepatitis. Sci Rep 2024; 14:16364. [PMID: 39013959 PMCID: PMC11252365 DOI: 10.1038/s41598-024-66287-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Accepted: 07/01/2024] [Indexed: 07/18/2024] Open
Abstract
Non-alcoholic steatohepatitis (NASH) is a hepatocyte inflammation based on hepatocellular steatosis, yet there is no effective drug treatment. Atherosclerosis (AS) is caused by lipid deposition in the endothelium, which can lead to various cardiovascular diseases. NASH and AS share common risk factors, and NASH can also elevate the risk of AS, causing a higher morbidity and mortality rate for atherosclerotic heart disease. Therefore, timely detection and diagnosis of NASH and AS are particularly important. In this study, differential gene expression analysis and weighted gene co-expression network analysis were performed on the AS (GSE100927) and NASH (GSE89632) datasets to obtain common crosstalk genes, respectively. Then, candidate Hub genes were screened using four topological algorithms and externally validated in the GSE43292 and GSE63067 datasets to obtain Hub genes. Furthermore, immune infiltration analysis and gene set variation analysis were performed on the Hub genes to explore the underlying mechanisms. The DGIbd database was used to screen candidate drugs for AS and NASH. Finally, a NASH model was constructed using free fatty acid-induced human L02 cells, an AS model was constructed using lipopolysaccharide-induced HUVECs, and a co-morbidity model was constructed using L02 cells and HUVECs to verify Hub gene expression. The result showed that a total of 113 genes common to both AS and NASH were identified as crosstalk genes, and enrichment analysis indicated that these genes were mainly involved in the regulation of immune and metabolism-related pathways. 28 candidate Hub genes were screened according to four topological algorithms, and CXCL9, IL2RB, and SPP1 were identified as Hub genes after in vitro experiments and external dataset validation. The ROC curves and SVM modeling demonstrated the good diagnostic efficacy of these three Hub genes. In addition, the Hub genes are strongly associated with immune cell infiltration, especially macrophages and γ-δ T cell infiltration. Finally, five potential therapeutic drugs were identified. has-miR-185 and hsa-miR-335 were closely related to AS and NASH. This study demonstrates that CXCL9, IL2RB, and SPP1 may serve as potential biomarkers for the diagnosis of the co-morbidity patterns of AS and NASH and as potential targets for drug therapy.
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Affiliation(s)
- Xize Wu
- Liaoning University of Traditional Chinese Medicine, No. 79 Chongshan East Road, Huanggu District, Shenyang, 110847, Liaoning, China
- Nantong Hospital of Traditional Chinese Medicine, Nantong Hospital Affiliated to Nanjing University of Chinese Medicine, Nantong, 226000, Jiangsu, China
| | - Changbin Yuan
- Liaoning University of Traditional Chinese Medicine, No. 79 Chongshan East Road, Huanggu District, Shenyang, 110847, Liaoning, China
| | - Jiaxiang Pan
- The Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, Shenyang, 110032, Liaoning, China
| | - Yi Zhou
- Liaoning University of Traditional Chinese Medicine, No. 79 Chongshan East Road, Huanggu District, Shenyang, 110847, Liaoning, China
| | - Xue Pan
- Liaoning University of Traditional Chinese Medicine, No. 79 Chongshan East Road, Huanggu District, Shenyang, 110847, Liaoning, China
- Dazhou Vocational College of Chinese Medicine, Dazhou, 635000, Sichuan, China
| | - Jian Kang
- Liaoning University of Traditional Chinese Medicine, No. 79 Chongshan East Road, Huanggu District, Shenyang, 110847, Liaoning, China
| | - Lihong Ren
- Nantong Hospital of Traditional Chinese Medicine, Nantong Hospital Affiliated to Nanjing University of Chinese Medicine, Nantong, 226000, Jiangsu, China.
| | - Lihong Gong
- Liaoning University of Traditional Chinese Medicine, No. 79 Chongshan East Road, Huanggu District, Shenyang, 110847, Liaoning, China.
- The Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, Shenyang, 110032, Liaoning, China.
- Liaoning Provincial Key Laboratory of TCM Geriatric Cardio-Cerebrovascular Diseases, Shenyang, 110847, Liaoning, China.
| | - Yue Li
- The Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, Shenyang, 110032, Liaoning, China.
- Liaoning Provincial Key Laboratory of TCM Geriatric Cardio-Cerebrovascular Diseases, Shenyang, 110847, Liaoning, China.
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Yang L, Liang Y, Pu J, Cai L, Gao R, Han F, Chang K, Pan S, Wu Z, Zhang Y, Wang Y, Song J, Wu H, Tang J, Wang X. Dysregulated serum lipid profile is associated with inflammation and disease activity in primary Sjögren's syndrome: a retrospective study in China. Immunol Lett 2024; 267:106865. [PMID: 38705483 DOI: 10.1016/j.imlet.2024.106865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 04/23/2024] [Accepted: 05/02/2024] [Indexed: 05/07/2024]
Abstract
PURPOSE To investigate the relationship between the lipid profiles of patients with primary Sjögren's syndrome (pSS) and other clinical characteristics, laboratory examination, disease activity, and inflammatory factors. In addition, the risk factors for hyperlipidemia-related complications of pSS and the effect of hydroxychloroquine (HCQ) usage on the lipid profile were incorporated into this study. METHODS This is a single-center, retrospective study that included 367 patients who were diagnosed with pSS at Tongji Hospital, School of Medicine, Tongji University, China from January 2010 to March 2022. Initially, demographic information, clinical characteristics, medication records, and complications of the patients were gathered. A case-control analysis compared the 12 systems involvement (ESSDAI domain), clinical symptoms, and laboratory tests between pSS patients with and without dyslipidemia. A simple linear regression model was employed to investigate the relationship between serum lipid profile and inflammatory factors. Logistics regression analysis was performed to assess variables for hyperlipidemia-related complications of pSS. The paired t-test was then used to evaluate the improvement in lipid profile among pSS patients. RESULTS 48.7 % of all pSS patients had dyslipidemia, and alterations in lipid levels were related to gender, age, and smoking status but not body mass index (BMI). Dyslipidemia is more prevalent in pSS patients who exhibit heightened autoimmunity and elevated levels of inflammation. Higher concentrations of multiple highly inflammatory factors correlate with a more severe form of dyslipidemia. Non-traditional cardiovascular risk factors may contribute to hyperlipidemia-related complications of pSS, such as increased, low complement 3 (C3) and low C4. According to our study, HCQ usage may protect against lipid-related disease in pSS. CONCLUSION Attention should be paid to the dyslipidemia of pSS. This research aims to clarify the population portrait of pSS patients with abnormal lipid profiles and provides insights into the correlation between metabolism and inflammation in individuals with pSS and the potential role they play in the advancement of the disease. These findings provide novel avenues for further understanding the underlying mechanisms of pSS pathogenesis.
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Affiliation(s)
- Lufei Yang
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Yuanyuan Liang
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Jincheng Pu
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Li Cai
- Department of Science and Research, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Ronglin Gao
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Fang Han
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Keni Chang
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Shengnan Pan
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Zhenzhen Wu
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Youwei Zhang
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Yanqing Wang
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Jiamin Song
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Huihong Wu
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China
| | - Jianping Tang
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China..
| | - Xuan Wang
- Department of Rheumatology and Immunology, Tongji Hospital, School of Medicine, Tongji University, Shanghai 200065, China..
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Bock ME, Wall L, Dobrec C, Chandran M, Goebel J. Management of dyslipidemia in pediatric renal transplant recipients. Pediatr Nephrol 2021; 36:51-63. [PMID: 31897714 DOI: 10.1007/s00467-019-04428-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 11/11/2019] [Accepted: 11/19/2019] [Indexed: 01/07/2023]
Abstract
Dyslipidemia after kidney transplantation is a common complication that has historically been underappreciated, especially in pediatric recipients. It is also a major modifiable risk factor for cardiovascular disease, a top cause of morbidity and mortality of transplant patients. While most knowledge about post-transplant dyslipidemia has been generated in adults, recommendations and treatment strategies also exist for children and are presented in this review. Awareness of these applicable guidelines and approaches is required, but not sufficient, for the reliable management of dyslipidemia in our patients, and additional needs and opportunities for comprehensive care in this area (e.g., quality improvement) are outlined.
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Affiliation(s)
- Margret E Bock
- Section of Pediatric Nephrology, Children's Hospital Colorado, University of Colorado, Aurora, CO, USA
| | - Leslie Wall
- Clinical Nutrition Department, Children's Hospital Colorado, Aurora, CO, USA
| | - Carly Dobrec
- Clinical Nutrition Department, Children's Hospital Colorado, Aurora, CO, USA
| | - Mary Chandran
- Pharmacy Department, Children's Hospital Colorado, University of Colorado, Aurora, CO, USA
| | - Jens Goebel
- Section of Pediatric Nephrology, Children's Hospital Colorado, University of Colorado, Aurora, CO, USA.
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Ghamar Talepoor A, Khosropanah S, Doroudchi M. Functional subsets of circulating follicular helper T cells in patients with atherosclerosis. Physiol Rep 2020; 8:e14637. [PMID: 33230950 PMCID: PMC7683878 DOI: 10.14814/phy2.14637] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/11/2020] [Accepted: 10/13/2020] [Indexed: 12/14/2022] Open
Abstract
Frequencies of circulating T follicular helper (cTfh) functional subsets vary in autoimmune diseases. We evaluated the frequencies and clinical relevance of functional subsets of cTfhs in patients with different degrees of stenosis. Blood samples were collected from high (≥50%) (n = 12) and low (<50%) stenosis (n = 12) groups and healthy controls (n = 6). Three subsets of cTfh cells including cTfh1 (CXCR3+ CCR6- ), cTfh2 (CXCR3- CCX6- ), and cTfh17 (CXCR3- CCR6+ ) were detected by flow cytometry. The frequency of cTfh1 cells was higher in control (p = .0006) and low-stenosis groups (p = .005) compared to high-stenosis group. The percentages of cTfh2 and cTfh17 cells were increased in high-stenosis compared to low-stenosis (p = .002 and p = .007) and control groups (p = .0004 and p = .0005), respectively. The frequency of cTfh1 cells negatively correlated with cholesterol (p = .040; r = -.44), C-reactive protein (CRP) (p = .015; r = -.68), erythrocyte sedimentation rate (ESR) (p = .002; r = -.79), neutrophil/lymphocyte ratio (NLR) (p = .028; r = -.67), and cTfh17 (p = .017; r = -.7244) in the high-stenosis group. The percentages of cTfh2 and cTfh17 cells positively correlated with cholesterol (p = .025; r = .77 and p = .033; r = .71), CRP (p = .030; r = .61 and p = .020; r = .73), ESR (p = .027; r = .69 and p = .029; r = .70), NLR (p = .004; r = .76 and p = .005; r = .74), and with each other (p = .022; r = .7382), respectively, in the high-stenosis group. The increased frequencies of cTfh2 and cTfh17 subsets and their correlation with laboratory parameters in patients with atherosclerosis may suggest their role in promoting the inflammatory response and atherosclerosis progression.
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Affiliation(s)
- Atefe Ghamar Talepoor
- Department of ImmunologySchool of MedicineShiraz University of Medical SciencesShirazIran
| | - Shahdad Khosropanah
- Department of CardiologySchool of MedicineShiraz University of Medical SciencesShirazIran
| | - Mehrnoosh Doroudchi
- Department of ImmunologySchool of MedicineShiraz University of Medical SciencesShirazIran
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Gaddis DE, Padgett LE, Wu R, McSkimming C, Romines V, Taylor AM, McNamara CA, Kronenberg M, Crotty S, Thomas MJ, Sorci-Thomas MG, Hedrick CC. Apolipoprotein AI prevents regulatory to follicular helper T cell switching during atherosclerosis. Nat Commun 2018; 9:1095. [PMID: 29545616 PMCID: PMC5854619 DOI: 10.1038/s41467-018-03493-5] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Accepted: 02/19/2018] [Indexed: 12/18/2022] Open
Abstract
Regulatory T (Treg) cells contribute to the anti-inflammatory response during atherogenesis. Here we show that during atherogenesis Treg cells lose Foxp3 expression and their immunosuppressive function, leading to the conversion of a fraction of these cells into T follicular helper (Tfh) cells. We show that Tfh cells are pro-atherogenic and that their depletion reduces atherosclerosis. Mechanistically, the conversion of Treg cells to Tfh cells correlates with reduced expression of IL-2Rα and pSTAT5 levels and increased expression of IL-6Rα. In vitro, incubation of naive T cells with oxLDL prevents their differentiation into Treg cells. Furthermore, injection of lipid-free Apolipoprotein AI (ApoAI) into ApoE−/− mice reduces intracellular cholesterol levels in Treg cells and prevents their conversion into Tfh cells. Together our results suggest that ApoAI, the main protein in high-density lipoprotein particles, modulates the cellular fate of Treg cells and thus influences the immune response during atherosclerosis. Regulatory T (Treg) cells contribute to the anti-inflammatory response during atherogenesis. Here Gaddis et al. show that Apolipoprotein AI prevents the conversion of Treg cells into pro-atherogenic T follicular helper cells, and thus regulates the immune response during atherogenesis.
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Affiliation(s)
- Dalia E Gaddis
- Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA, 92037, USA
| | - Lindsey E Padgett
- Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA, 92037, USA
| | - Runpei Wu
- Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA, 92037, USA
| | - Chantel McSkimming
- Cardiovascular Research Center and Division of Cardiology, University of Virginia, 415 Lane Road, Charlottesville, VA, 22908, USA
| | - Veronica Romines
- Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA, 92037, USA
| | - Angela M Taylor
- Cardiovascular Research Center and Division of Cardiology, University of Virginia, 415 Lane Road, Charlottesville, VA, 22908, USA
| | - Coleen A McNamara
- Cardiovascular Research Center and Division of Cardiology, University of Virginia, 415 Lane Road, Charlottesville, VA, 22908, USA
| | - Mitchell Kronenberg
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA, 92037, USA
| | - Shane Crotty
- Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA, 92037, USA.,Division of Infectious Diseases, Department of Medicine, UCSD School of Medicine, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Michael J Thomas
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Rd, Milwaukee, WI, 53226, USA
| | - Mary G Sorci-Thomas
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Rd, Milwaukee, WI, 53226, USA.,Department of Medicine, Division of Endocrinology, Medical College of Wisconsin, 9200W. Wisconsin Ave., Milwaukee, WI, 53226, USA
| | - Catherine C Hedrick
- Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA, 92037, USA.
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Balycheva M, Faggian G, Glukhov AV, Gorelik J. Microdomain-specific localization of functional ion channels in cardiomyocytes: an emerging concept of local regulation and remodelling. Biophys Rev 2015; 7:43-62. [PMID: 28509981 PMCID: PMC5425752 DOI: 10.1007/s12551-014-0159-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 12/18/2014] [Indexed: 12/26/2022] Open
Abstract
Cardiac excitation involves the generation of action potential by individual cells and the subsequent conduction of the action potential from cell to cell through intercellular gap junctions. Excitation of the cellular membrane results in opening of the voltage-gated L-type calcium ion (Ca2+) channels, thereby allowing a small amount of Ca2+ to enter the cell, which in turn triggers the release of a much greater amount of Ca2+ from the sarcoplasmic reticulum, the intracellular Ca2+ store, and gives rise to the systolic Ca2+ transient and contraction. These processes are highly regulated by the autonomic nervous system, which ensures the acute and reliable contractile function of the heart and the short-term modulation of this function upon changes in heart rate or workload. It has recently become evident that discrete clusters of different ion channels and regulatory receptors are present in the sarcolemma, where they form an interacting network and work together as a part of a macro-molecular signalling complex which in turn allows the specificity, reliability and accuracy of the autonomic modulation of the excitation-contraction processes by a variety of neurohormonal pathways. Disruption in subcellular targeting of ion channels and associated signalling proteins may contribute to the pathophysiology of a variety of cardiac diseases, including heart failure and certain arrhythmias. Recent methodological advances have made it possible to routinely image the topography of live cardiomyocytes, allowing the study of clustering functional ion channels and receptors as well as their coupling within a specific microdomain. In this review we highlight the emerging understanding of the functionality of distinct subcellular microdomains in cardiac myocytes (e.g. T-tubules, lipid rafts/caveolae, costameres and intercalated discs) and their functional role in the accumulation and regulation of different subcellular populations of sodium, Ca2+ and potassium ion channels and their contributions to cellular signalling and cardiac pathology.
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Affiliation(s)
- Marina Balycheva
- Department of Cardiovascular Sciences, National Heart and Lung Institute, Imperial Centre for Translational and Experimental Medicine, Imperial College London, 4th Floor National Heart and Lung Institute, Hammersmith Campus, Du Cane Road, London, W12 0NN, UK
- Cardiosurgery Department, University of Verona School of Medicine, Verona, Italy
| | - Giuseppe Faggian
- Cardiosurgery Department, University of Verona School of Medicine, Verona, Italy
| | - Alexey V Glukhov
- Department of Cardiovascular Sciences, National Heart and Lung Institute, Imperial Centre for Translational and Experimental Medicine, Imperial College London, 4th Floor National Heart and Lung Institute, Hammersmith Campus, Du Cane Road, London, W12 0NN, UK.
| | - Julia Gorelik
- Department of Cardiovascular Sciences, National Heart and Lung Institute, Imperial Centre for Translational and Experimental Medicine, Imperial College London, 4th Floor National Heart and Lung Institute, Hammersmith Campus, Du Cane Road, London, W12 0NN, UK.
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Different subcellular populations of L-type Ca2+ channels exhibit unique regulation and functional roles in cardiomyocytes. J Mol Cell Cardiol 2011; 52:376-87. [PMID: 21888911 DOI: 10.1016/j.yjmcc.2011.08.014] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 07/11/2011] [Accepted: 08/17/2011] [Indexed: 11/23/2022]
Abstract
Influx of Ca(2+) through L-type Ca(2+) channels (LTCCs) contributes to numerous cellular processes in cardiomyocytes including excitation-contraction (EC) coupling, membrane excitability, and transcriptional regulation. Distinct subpopulations of LTCCs have been identified in cardiac myocytes, including those at dyadic junctions and within different plasma membrane microdomains such as lipid rafts and caveolae. These subpopulations of LTCCs exhibit regionally distinct functional properties and regulation, affording precise spatiotemporal modulation of L-type Ca(2+) current (I(Ca,L)). Different subcellular LTCC populations demonstrate variable rates of Ca(2+)-dependent inactivation and sometimes coupled gating of neighboring channels, which can lead to focal, persistent I(Ca,L). In addition, the assembly of spatially defined macromolecular signaling complexes permits compartmentalized regulation of I(Ca,L) by a variety of neurohormonal pathways. For example, β-adrenergic receptor subtypes signal to different LTCC subpopulations, with β(2)-adrenergic activation leading to enhanced I(Ca,L) through caveolar LTCCs and β(1)-adrenergic stimulation modulating LTCCs outside of caveolae. Disruptions in the normal subcellular targeting of LTCCs and associated signaling proteins may contribute to the pathophysiology of a variety of cardiac diseases including heart failure and certain arrhythmias. Further identifying the characteristic functional properties and array of regulatory molecules associated with specific LTCC subpopulations will provide a mechanistic framework to understand how LTCCs contribute to diverse cellular processes in normal and diseased myocardium. This article is part of a Special Issue entitled "Local Signaling in Myocytes".
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Engagement of the CD4 receptor affects the redistribution of Lck to the immunological synapse in primary T cells: implications for T-cell activation during human immunodeficiency virus type 1 infection. J Virol 2008; 83:1193-200. [PMID: 19019957 DOI: 10.1128/jvi.01023-08] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Understanding the molecular mechanisms underlying dysregulated immune responses in human immunodeficiency virus type 1 (HIV-1) infection is crucial for the control of HIV/AIDS. Despite the postulate that HIV envelope glycoprotein gp120-CD4 interactions lead to impaired T-cell responses, the precise mechanisms underlying such association are not clear. To address this, we analyzed Lck and F-actin redistribution into the immunological synapse in stimulated human primary CD4(+) T cells from HIV-1-infected donors. Similar experiments were performed with CD4(+) T cells from HIV-uninfected donors, which were exposed to anti-CD4 domain 1 antibodies, as an in vitro model of gp120-CD4 interactions, or aldithriol-inactivated HIV-1 virions before stimulation. CD4(+) T cells from HIV-infected patients exhibited a two- to threefold inhibition of both Lck and F-actin recruitment into the synapse, compared to cells from uninfected donors. Interestingly, defective recruitment of Lck was ameliorated following suppressive highly active antiretroviral therapy. Engagement of the CD4 receptor on T cells from HIV-uninfected donors before anti-CD3/CD28 stimulation led to similar defects. Furthermore, the redistribution of Lck into lipid rafts was abrogated by CD4 preengagement. Our results suggest that the engagement of CD4 by HIV gp120 prior to T-cell receptor stimulation leads to dysregulation of early signaling events and could consequently play an important role in impaired CD4(+) T-cell function.
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In-vivo effects of simvastatin and rosuvastatin on global gene expression in peripheral blood leucocytes in a human inflammation model. Pharmacogenet Genomics 2008; 18:109-20. [DOI: 10.1097/fpc.0b013e3282f44d81] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Simvastatin suppresses lung inflammatory response in a rat cardiopulmonary bypass model. Ann Thorac Surg 2007; 84:2011-8. [PMID: 18036927 DOI: 10.1016/j.athoracsur.2007.07.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2007] [Revised: 07/09/2007] [Accepted: 07/09/2007] [Indexed: 01/04/2023]
Abstract
BACKGROUND Inflammatory response in the lungs is a well-known complication after cardiopulmonary bypass (CPB). The main aims of our study were to explore whether pretreatment with simvastatin would inhibit toll-like receptor 4 expression and suppress lung inflammatory response in a rat CPB model. METHODS Male Sprague-Dawley rats were divided into four groups (n = 6 each): sham group; CPB (control group); CPB plus low-dose simvastatin (5 mg/kg daily [L-Sim group]); and CPB plus high-dose simvastatin (10 mg/kg daily [H-Sim group]). Blood samples were collected at the beginning and at the termination of CPB, and at 1, 2, 4, and 24 hours after operation. The bronchoalveolar lavage fluid and lungs were harvested 24 hours postoperatively. RESULTS The simvastatin-treated groups had significantly higher ratios of PaO(2)/FiO(2) and lower values of respiratory index than the control group. We observed that simvastatin reduced CPB-induced toll-like receptor 4 and nuclear factor-kappaB expressions in CPB groups (p < 0.01, versus control group). The levels of interleukin-6, tumor necrosis factor-alpha, and monocyte chemotactic protein-1 in serum, bronchoalveolar lavage fluid, and lung tissues increased in CPB groups, whereas pretreatment with simvastatins reduced these inflammatory marks in a dose-dependent manner (p < 0.01, versus control group). Furthermore, pretreatment with simvastatin had a lower lung injury score (p < 0.05, versus control group). CONCLUSIONS These findings suggest that simvastatin inhibited CPB-induced toll-like receptor 4 upregulation and nuclear factor-kappaB activation, efficaciously reduing the pulmonary inflammatory response after CPB.
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The role of cohort studies in drug development: clinical evidence of antiviral activity of serotonin reuptake inhibitors and HMG-CoA reductase inhibitors in the central nervous system. J Neuroimmune Pharmacol 2007; 2:120-7. [PMID: 18040835 DOI: 10.1007/s11481-006-9054-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2006] [Accepted: 12/05/2006] [Indexed: 10/23/2022]
Abstract
BACKGROUND Effective antiretroviral therapy (ART) has reduced the incidence of HIV-associated neurocognitive impairment (HNCI) but its prevalence remains high. Clinical trials have yet to identify a consistently effective treatment for HNCI, other than ART, but in vitro data support that some drugs approved by the Food and Drug Administration (FDA) for other indications might benefit individuals with HNCI. Some of these drugs, such as serotonin reuptake inhibitors (SRIs) and HMG-CoA reductase inhibitors (statins), may do so by reducing HIV replication in the CNS and are already widely used by HIV-infected individuals. METHODS Six-hundred fifty-eight HIV-infected participants of the CHARTER cohort had a baseline assessment, which included comprehensive neuropsychological (NP) testing and HIV RNA measurements in plasma and cerebrospinal fluid (CSF). Four-hundred sixty-seven (71%) subjects used ART, 195 (30%) used SRIs, and 63 (10%) used statins. RESULTS SRI users were less likely to have HIV RNA levels in CSF above 50 copies (c)/mL (29 vs. 37% in non-SRI users, OR 0.69, p = 0.05). This association was most evident for three of the seven SRIs (citalopram, sertraline, and trazodone, or "antiviral" SRIs, combined 25 vs. 38% in non-SRI users, OR 0.56, p = 0.01) and was strongest in those not taking concomitant ART (61 vs. 83%, OR 0.31, p = 0.01). "Antiviral" SRI users also performed better on NP tests (median global deficit score 0.37 vs. 0.47, p = 0.04). Statin users were also less likely to have HIV RNA levels in CSF above 50 c/mL (16 vs. 37%, p < 0.001) but, in contrast to SRIs, the association was strongest in those taking ART (2 vs. 18%, p < 0.001). Statin use was not associated with better NP performance. Multivariate analyses indicated that the use of "antiviral" SRIs-but not statins-was associated with undetectable HIV RNA levels in CSF and better NP performance. CONCLUSIONS SRIs may reduce HIV replication in CSF and improve NP performance. This was particularly true for three SRIs-supporting differences in antiviral efficacy between drugs-in individuals who were not taking ART. In contrast, statins were not associated with lower HIV replication in CSF in multivariate analyses and were not associated with better NP performance. These analyses support the value of large observational cohort studies in identifying FDA-approved drugs that may be worth further investigation.
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Niessner A, Steiner S, Speidl WS, Pleiner J, Seidinger D, Maurer G, Goronzy JJ, Weyand CM, Kopp CW, Huber K, Wolzt M, Wojta J. Simvastatin suppresses endotoxin-induced upregulation of toll-like receptors 4 and 2 in vivo. Atherosclerosis 2006; 189:408-13. [PMID: 16443229 DOI: 10.1016/j.atherosclerosis.2005.12.022] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2005] [Revised: 12/17/2005] [Accepted: 12/21/2005] [Indexed: 10/25/2022]
Abstract
In addition to lipid lowering effects, statins appear to have pleiotropic immunomodulatory properties. As they particularly affect monocyte functions, we tested the influence of statin treatment on the monocyte activating toll-like receptors (TLR) 4 and 2 in response to lipopolysaccharides (LPS) in vivo. In this double-blind, placebo-controlled study, 20 healthy, male subjects were randomized to receive either simvastatin (80 mg/day) or placebo for 4 days before intravenous LPS administration (20 IU/kg). Simvastatin did not influence the increase in TLR transcripts after LPS administration measured in mRNA isolated from whole blood by quantitative RT-PCR. In contrast, the parallel upregulation of TLR4 and TLR2 on the surface of monocytes determined by flow cytometry was attenuated by more than half after LPS challenge (P<0.02). Suppressed TLR4 and TLR2 expression was associated with diminished circulating concentrations of tumor necrosis factor-alpha and monocyte chemoattractant protein-1. In conclusion, high-dose simvastatin pretreatment blunted TLR4 and TLR2 expression on monocytes in a human endotoxemia model on a posttranscriptional level. This suppressive effect of statins on key receptors of the innate immunity which was associated with a reduction of effector cytokines reveals a potential mechanism for their beneficial effects in sepsis and cardiovascular disease.
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Affiliation(s)
- Alexander Niessner
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria.
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