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Pujar M, Vastrad B, Kavatagimath S, Vastrad C, Kotturshetti S. Identification of candidate biomarkers and pathways associated with type 1 diabetes mellitus using bioinformatics analysis. Sci Rep 2022; 12:9157. [PMID: 35650387 PMCID: PMC9160069 DOI: 10.1038/s41598-022-13291-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 05/16/2022] [Indexed: 12/14/2022] Open
Abstract
Type 1 diabetes mellitus (T1DM) is a metabolic disorder for which the underlying molecular mechanisms remain largely unclear. This investigation aimed to elucidate essential candidate genes and pathways in T1DM by integrated bioinformatics analysis. In this study, differentially expressed genes (DEGs) were analyzed using DESeq2 of R package from GSE162689 of the Gene Expression Omnibus (GEO). Gene ontology (GO) enrichment analysis, REACTOME pathway enrichment analysis, and construction and analysis of protein–protein interaction (PPI) network, modules, miRNA-hub gene regulatory network and TF-hub gene regulatory network, and validation of hub genes were performed. A total of 952 DEGs (477 up regulated and 475 down regulated genes) were identified in T1DM. GO and REACTOME enrichment result results showed that DEGs mainly enriched in multicellular organism development, detection of stimulus, diseases of signal transduction by growth factor receptors and second messengers, and olfactory signaling pathway. The top hub genes such as MYC, EGFR, LNX1, YBX1, HSP90AA1, ESR1, FN1, TK1, ANLN and SMAD9 were screened out as the critical genes among the DEGs from the PPI network, modules, miRNA-hub gene regulatory network and TF-hub gene regulatory network. Receiver operating characteristic curve (ROC) analysis confirmed that these genes were significantly associated with T1DM. In conclusion, the identified DEGs, particularly the hub genes, strengthen the understanding of the advancement and progression of T1DM, and certain genes might be used as candidate target molecules to diagnose, monitor and treat T1DM.
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Affiliation(s)
- Madhu Pujar
- Department of Pediatrics, J J M Medical College, Davangere, Karnataka, 577004, India
| | - Basavaraj Vastrad
- Department of Pharmaceutical Chemistry, K.L.E. College of Pharmacy, Gadag, Karnataka, 582101, India
| | - Satish Kavatagimath
- Department of Pharmacognosy, K.L.E. College of Pharmacy, Belagavi, Karnataka, 590010, India
| | - Chanabasayya Vastrad
- Biostatistics and Bioinformatics, Chanabasava Nilaya, Bharthinagar, Dharwad, Karnataka, 580001, India.
| | - Shivakumar Kotturshetti
- Biostatistics and Bioinformatics, Chanabasava Nilaya, Bharthinagar, Dharwad, Karnataka, 580001, India
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Dai M, Jiang T, Luo CD, Du W, Wang M, Qiu QY, Wang H. Radiofrequency ablation reduces expression of SELF by upregulating the expression of microRNA-26a/b in the treatment of atrial fibrillation. J Interv Card Electrophysiol 2022; 65:663-673. [PMID: 35864328 PMCID: PMC9726778 DOI: 10.1007/s10840-022-01305-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 07/11/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND In this study, we aimed to investigate the role of miR-26a and miR-26b in the management of AF. METHODS Real-time PCR was carried out to determine plasma microRNA expression in AF patients pre- and post-radiofrequency ablation. The correlation between the expression of SELP and miR-26a/miR-26b was also studied using luciferase assays to establish a miR-26a/miR-26b/SELP signaling pathway. RESULTS The relative expression of SELP reached its peak in pre-ablation AF ( +) patients, while ablation treatment reduced the expression of SELP in AF ( +) patients. Similarly, AF pigs showed dysregulation of miR-26a/b and SELP, thus verifying the involvement of miR-26a/b and SELP in AF. Meanwhile, the regulatory association between SELP and miR-26a/b was also investigated, and the results showed that the presence of pre-miR-26a/b increased the levels of miR-26a/b and inhibited the mRNA/protein expression of SELP. Finally, using bioinformatic tools and luciferase assays, SELP mRNA was confirmed as the target of miR-26a/b, which affected the effect of AF ablation treatment. CONCLUSIONS RFA helped to restore circulating levels of miR-26, which were reduced in atrial fibrillation. Meanwhile, miR-26 is a potential cause for the elevated plasma levels of pro-thrombogenic SELP in that disease.
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Affiliation(s)
- Min Dai
- grid.54549.390000 0004 0369 4060Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, 12 Changjia Alley, Fucheng District, Mianyang, 621000 Sichuan China
| | - Tao Jiang
- grid.54549.390000 0004 0369 4060Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, 12 Changjia Alley, Fucheng District, Mianyang, 621000 Sichuan China
| | - Cai-dong Luo
- grid.54549.390000 0004 0369 4060Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, 12 Changjia Alley, Fucheng District, Mianyang, 621000 Sichuan China
| | - Wei Du
- grid.54549.390000 0004 0369 4060Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, 12 Changjia Alley, Fucheng District, Mianyang, 621000 Sichuan China
| | - Min Wang
- grid.54549.390000 0004 0369 4060Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, 12 Changjia Alley, Fucheng District, Mianyang, 621000 Sichuan China
| | - Qing-yan Qiu
- grid.54549.390000 0004 0369 4060Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, 12 Changjia Alley, Fucheng District, Mianyang, 621000 Sichuan China
| | - Hu Wang
- grid.54549.390000 0004 0369 4060Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, 12 Changjia Alley, Fucheng District, Mianyang, 621000 Sichuan China
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Abstract
Atherosclerosis is a chronic inflammatory vascular disease and the predominant cause of heart attack and ischemic stroke. Despite the well-known sexual dimorphism in the incidence and complications of atherosclerosis, there are relatively limited data in the clinical and preclinical literature to rigorously address mechanisms underlying sex as a biological variable in atherosclerosis. In multiple histological and imaging studies, overall plaque burden and markers of inflammation appear to be greater in men than women and are predictive of cardiovascular events. However, while younger women are relatively protected from cardiovascular disease, by the seventh decade, the incidence of myocardial infarction in women ultimately surpasses that of men, suggesting an interaction between sex and age. Most preclinical studies in animal atherosclerosis models do not examine both sexes, and even in those that do, well-powered direct statistical comparisons for sex as an independent variable remain rare. This article reviews the available data. Overall, male animals appear to have more inflamed yet smaller plaques compared to female animals. Plaque inflammation is often used as a surrogate end point for plaque vulnerability in animals. The available data support the notion that rather than plaque size, plaque inflammation may be more relevant in assessing sex-specific mechanisms since the findings correlate with the sex difference in ischemic events and mortality and thus may be more reflective of the human condition. Overall, the number of preclinical studies directly comparing plaque inflammation between the sexes is extremely limited relative to the vast literature exploring atherosclerosis mechanisms. Failure to include both sexes and to address age in mechanistic atherosclerosis studies are missed opportunities to uncover underlying sex-specific mechanisms. Understanding the mechanisms driving sex as a biological variable in atherosclerotic disease is critical to future precision medicine strategies to mitigate what is still the leading cause of death of men and women worldwide.
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Affiliation(s)
- Joshua J Man
- From the Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (J.J.M., I.Z.J.).,Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, MA (J.J.M.)
| | - Joshua A Beckman
- Cardiovascular Division, Vanderbilt University Medical Center, Nashville, TN (J.A.B.)
| | - Iris Z Jaffe
- From the Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (J.J.M., I.Z.J.)
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Diacerein inhibits the pro-atherogenic & pro-inflammatory effects of IL-1 on human keratinocytes & endothelial cells. PLoS One 2017; 12:e0173981. [PMID: 28323859 PMCID: PMC5360272 DOI: 10.1371/journal.pone.0173981] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 03/01/2017] [Indexed: 02/08/2023] Open
Abstract
We investigated IL-1-induced regulation of genes related to inflammation and atherogenesis in human keratinocytes and endothelial cells, and if ‘diacerein’, an oral IL-1 inhibiting drug currently approved for use in osteoarthritis, would reverse IL-1’s effects on these cells. Primary human keratinocytes and coronary artery endothelial cells were treated with either IL-1α or IL-1β, with and without diacerein. Using PCR-array, we assessed differential gene-expression regulated by IL-1 and diacerein. We identified 34 pro-atherogenic genes in endothelial cells and 68 pro-inflammatory genes in keratinocytes significantly (p<0.05) regulated at least 2-fold by IL-1, in comparison to control. Diacerein completely or partially reversed this regulation on almost all genes. Using ELISA, we confirmed diacerein’s ability to reverse IL-1-driven gene-regulation of 11 selected factors, at the protein level. The results support a novel idea that diacerein acts as an inhibitor of the pro-atherogenic and pro-inflammatory effects of IL-1. Diacerein may have therapeutic applications to diminish IL-1-induced skin inflammation in psoriasis and attenuate IL-1-induced development of atherosclerosis. Further investigation into diacerein’s effect on skin inflammation, atherogenesis and cardiovascular risk in animal models or humans is warranted.
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Kaur R, Singh J, Kaur M. Structural and functional impact of SNPs in P-selectin gene: A comprehensive in silico analysis. Open Life Sci 2017. [DOI: 10.1515/biol-2017-0003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
AbstractP-selectin is an adhesion molecule which plays an important role in the development of inflammation. It is encoded by the SELP gene located on chromosome 1q21-q24. Various single nucleotide polymorphisms (SNPs) ofSELPhave been reported to be associated with various inflammatory disease conditions. The genetics behind these diseases could be better understood by knowing the structural and functional impact of various genetic determinants ofSELP. So far, this is the first comprehensive and systematicin silicoanalysis of SNPs inSELP. A total of 2780 SNPs ofSELPwere retrieved from NCBI dbSNP. Only conserved and validated SNPs with minor allele frequency (MAF) ≥ 0.05 were subjected to further analysis. Based on these criteria, we selected 4 non-synonymous SNPs (nsSNPs) and 119 non-coding SNPs (ncSNPs). The nsSNPs were analyzed for deleterious effects using SIFT, Polyphen-2, nsSNPAnalyzer, SNP & Go, SNPs3, Mutperd and I-mutant web tools. The template prediction for variant structure modeling was performed using MUSTER and SWISS-MODEL. The functional impact of ncSNPs was analyzed by SNPinfo and RegulomeDB. Thein silicoanalysis predicted 3 nsSNPs and 21 ncSNPs as potential candidates for future case-control association studies and functional analysis ofSELP.
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Affiliation(s)
- Raminderjit Kaur
- Department of Human Genetics, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Jatinder Singh
- Department of Molecular Biology & Biochemistry, Guru Nanak Dev University, Amritsar, Punjab India
| | - Manpreet Kaur
- Department of Human Genetics, Guru Nanak Dev University, Amritsar, Punjab, India
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Ewald DA, Malajian D, Krueger JG, Workman CT, Wang T, Tian S, Litman T, Guttman-Yassky E, Suárez-Fariñas M. Meta-analysis derived atopic dermatitis (MADAD) transcriptome defines a robust AD signature highlighting the involvement of atherosclerosis and lipid metabolism pathways. BMC Med Genomics 2015; 8:60. [PMID: 26459294 PMCID: PMC4603338 DOI: 10.1186/s12920-015-0133-x] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 09/11/2015] [Indexed: 12/24/2022] Open
Abstract
Background Atopic dermatitis (AD) is a common inflammatory skin disease with limited treatment options. Several microarray experiments have been conducted on lesional/LS and non-lesional/NL AD skin to develop a genomic disease phenotype. Although these experiments have shed light on disease pathology, inter-study comparisons reveal large differences in resulting sets of differentially expressed genes (DEGs), limiting the utility of direct comparisons across studies. Methods We carried out a meta-analysis combining 4 published AD datasets to define a robust disease profile, termed meta-analysis derived AD (MADAD) transcriptome. Results This transcriptome enriches key AD pathways more than the individual studies, and associates AD with novel pathways, such as atherosclerosis signaling (IL-37, selectin E/SELE). We identified wide lipid abnormalities and, for the first time in vivo, correlated Th2 immune activation with downregulation of key epidermal lipids (FA2H, FAR2, ELOVL3), emphasizing the role of cytokines on the barrier disruption in AD. Key AD “classifier genes” discriminate lesional from nonlesional skin, and may evaluate therapeutic responses. Conclusions Our meta-analysis provides novel and powerful insights into AD disease pathology, and reinforces the concept of AD as a systemic disease. Electronic supplementary material The online version of this article (doi:10.1186/s12920-015-0133-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- David A Ewald
- The Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY, USA. .,Molecular Biomedicine, LEO Pharma AS, Ballerup, Denmark. .,Center for Biological Sequence Analysis, Department of Systems Biology, Technical University of Denmark, Kgs. Lyngby, Denmark.
| | - Dana Malajian
- The Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY, USA. .,Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, NY, USA. .,Columbia University, College of Physicians and Surgeons, New York, NY, USA.
| | - James G Krueger
- The Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY, USA.
| | - Christopher T Workman
- Center for Biological Sequence Analysis, Department of Systems Biology, Technical University of Denmark, Kgs. Lyngby, Denmark.
| | - Tianjiao Wang
- School of Life Science, Jilin University, 2699 Qianjin Street, Changchun, Jilin, 130012, China.
| | - Suyan Tian
- School of Life Science, Jilin University, 2699 Qianjin Street, Changchun, Jilin, 130012, China.
| | - Thomas Litman
- Molecular Biomedicine, LEO Pharma AS, Ballerup, Denmark.
| | - Emma Guttman-Yassky
- The Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY, USA. .,Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Mayte Suárez-Fariñas
- The Laboratory for Investigative Dermatology, The Rockefeller University, New York, NY, USA. .,Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, NY, USA. .,Department of Population Health Science and Policy, Icahn School of Medicine at Mount Sinai, New York, NY, USA. .,Icahn Institute for Genomics and Multiscale Biology at Mount Sinai, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
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Gremmel T, Koppensteiner R, Kaider A, Eichelberger B, Mannhalter C, Panzer S. Impact of variables of the P-selectin - P-selectin glycoprotein ligand-1 axis on leukocyte-platelet interactions in cardiovascular disease. Thromb Haemost 2014; 113:806-12. [PMID: 25428141 DOI: 10.1160/th14-08-0690] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 10/27/2014] [Indexed: 11/05/2022]
Abstract
The formation of leukocyte-platelet aggregates (LPA), through the P-selectin - P-selectin glycoprotein ligand (PSGL)-1 axis, plays a pivotal role in atherothrombosis. In order to investigate the influence of platelet (pP-selectin) and soluble P-selectin (sP-selectin), and of variations in the genes encoding for P-selectin (SELP) and PSGL-1 (SELPLG) on LPA formation, we assessed monocyte (MPA)- and neutrophil-platelet aggregates (NPA) as well as pP-selectin by flow cytometry in 263 patients undergoing angioplasty and stenting. sP-selectin was determined by ELISA, the SELP Pro715 allele and the SELPLG Ile62 allele were determined by allele specific PCR. The Pro715 allele was significantly associated with lower levels of in vivo pP-selectin and sP-selectin, while agonists´ inducible pP-selectin was not influenced by the Pro715 allele. PP-selectin was significantly associated with MPA and NPA formation. The in vivo formation of MPA and NPA depended to 19 % and 7.4 %, respectively, on in vivo pP-selectin, irrespective of the Pro715 allele and the Ile62 allele carrier status. TRAP-6 inducible MPA and NPA depended to 34 % and 27 %, respectively, on TRAP-6 inducible pP-selectin, but were independent of the Pro715 allele carrier status. Carriers of the Ile62 allele showed a stronger correlation between TRAP-6 inducible pP-selectin and TRAP-6 inducible MPA/NPA than non-carriers. Furthermore, TRAP-6 inducible NPA were higher in Ile62 allele carriers, which suggests higher thrombin sensitivity. In conclusion, our findings point to the significant role of pP-selectin for MPA and NPA formation, while other variables like sP-selectin, the SELP Pro715 allele and the SELPLG Ile62 allele have less influence.
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Affiliation(s)
- Thomas Gremmel
- Thomas Gremmel, MD, Department of Internal Medicine II, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria, Tel.: +431 40400 4671, Fax: +431 40400 4665, E-mail:
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8
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Jilma-Stohlawetz P, Mannhalter C, Kaider A, Waidacher T, Jilma B, Panzer S. The association of the Thr715Pro P-selectin genotype with levels of P-selectin in platelet concentrates. Vox Sang 2014; 107:368-74. [DOI: 10.1111/vox.12175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 05/08/2014] [Accepted: 05/16/2014] [Indexed: 11/27/2022]
Affiliation(s)
- P. Jilma-Stohlawetz
- Department of Blood Group Serology and Transfusion Medicine; Medical University of Vienna; Vienna Austria
| | - C. Mannhalter
- Department of Laboratory Medicine; Medical University of Vienna; Vienna Austria
| | - A. Kaider
- Section for Clinical Biometrics; Center for Medical Statistics, Informatics and Intelligent Systems; Medical University of Vienna; Vienna Austria
| | - T. Waidacher
- Department of Blood Group Serology and Transfusion Medicine; Medical University of Vienna; Vienna Austria
| | - B. Jilma
- Department of Clinical Pharmacology; Medical University of Vienna; Vienna Austria
| | - S. Panzer
- Department of Blood Group Serology and Transfusion Medicine; Medical University of Vienna; Vienna Austria
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Badr Eslam R, Gremmel T, Schneller A, Stegfellner M, Kaider A, Mannhalter C, Lang I, Panzer S. High levels of platelet-monocyte aggregates after valve replacement for aortic stenosis: Relation to soluble P-selectin and P-selectin glycoprotein ligand-1 genes. Thromb Res 2012; 129:453-8. [DOI: 10.1016/j.thromres.2011.07.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Revised: 07/03/2011] [Accepted: 07/12/2011] [Indexed: 02/06/2023]
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10
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Zivković M, Kolaković A, Radak D, Dinčić D, Radak S, Djurić T, Stanković A. The sex-specific association of Met62Ile gene polymorphism in P-selectin glycoprotein ligand (PSGL-1) with carotid plaque presence: preliminary study. Mol Biol Rep 2012; 39:6479-85. [PMID: 22307784 DOI: 10.1007/s11033-012-1475-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Accepted: 01/24/2012] [Indexed: 01/12/2023]
Abstract
Atherosclerosis is known as an inflammatory disease in which a recruitment of leukocytes to the endothelium wall represents a preliminary step of the initiation and the development of disease. The P-selectin glycoprotein ligand (PSGL-1) seems to be the major molecule mediating leukocyte-endothelium interactions and leukocyte rolling on stimulated endothelium. There are limited number of studies reporting on association of Met62Ile SNP in PSGL-1 gene and the risk for atherosclerosis. The aim of this study was to analyze possible association of this polymorphism with an advanced carotid atherosclerosis and biochemical markers of inflammation and haemostasis. The 275 patients consecutively admitted for carotid endarterectomy with stenosis >70% and 256 controls of the same ethnic origin were included in the study. The Met62Ile genotypes were determined by PCR RFLP. The Ile/Ile homozygotes had significantly higher CRP compared to the other genotypes in patients. Female patients had Ile allele dose-dependent association with the carotid plaque presence (Met/Met vs. Met/Ile vs. Ile/Ile; OR 1, OR 2.02, CI 1.0-4.08, OR 4.08, CI 1.0-16.81, respectively, p = 0.04). Our results suggest the impact of PSGL-1 Met62Ile polymorphism on inflammation in advanced atherosclerosis. We observed the sex-differential association of Met62Ile with advanced carotid atherosclerosis. Studies in larger and different populations should validate and further examine the suggested role of genetic variations in PSGL-1 with atherosclerosis and thrombosis.
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Affiliation(s)
- Maja Zivković
- Laboratory for Radiobiology and Molecular Genetics, Institute of Nuclear Sciences Vinča, University of Belgrade, Belgrade, Serbia.
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11
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Gremmel T, Kopp CW, Steiner S, Seidinger D, Ay C, Koppensteiner R, Mannhalter C, Panzer S. The P-selectin gene Pro715 allele and low levels of soluble P-selectin are associated with reduced P2Y12 adenosine diphosphate receptor reactivity in clopidogrel-treated patients. Atherosclerosis 2011; 217:135-8. [DOI: 10.1016/j.atherosclerosis.2011.03.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2010] [Revised: 03/21/2011] [Accepted: 03/22/2011] [Indexed: 10/18/2022]
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Phenotypic differences of human neutrophils of carriers of the PSGL-1 A and B-allele in binding to immobilised P-selectin under flow conditions. Thromb Res 2011; 127:105-10. [DOI: 10.1016/j.thromres.2010.11.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2010] [Revised: 11/10/2010] [Accepted: 11/10/2010] [Indexed: 01/20/2023]
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Grabe HJ, Schwahn C, Appel K, Mahler J, Schulz A, Spitzer C, Fenske K, Barnow S, Lucht M, Freyberger HJ, John U, Teumer A, Wallaschofski H, Nauck M, Völzke H. Childhood maltreatment, the corticotropin-releasing hormone receptor gene and adult depression in the general population. Am J Med Genet B Neuropsychiatr Genet 2010; 153B:1483-93. [PMID: 20957648 DOI: 10.1002/ajmg.b.31131] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2010] [Accepted: 09/01/2010] [Indexed: 11/10/2022]
Abstract
Dysregulations of the hypothalamic-pituitary-adrenal (HPA) axis have been implicated in the pathogenesis of depressive disorders and the corticotropin-releasing hormone (CRH) was found to modulate emotional memory consolidation. Recently, two studies have reported an interaction between childhood abuse and the TAT-haplotype of the CRH-Receptor Gene (CRHR1) connecting childhood adversities and genetic susceptibility to adult depression. We tested the hypothesis of an interaction of childhood maltreatment with single nucleotide polymorphisms (SNPs) and haplotypes of the CRHR1 gene not previously investigated. Caucasian subjects (n = 1,638) from the German general population (Study of Health in Pomerania, SHIP) were analyzed. As in the previous studies, childhood abuse and neglect were assessed with the Childhood Trauma Questionnaire (CTQ) and depression with the Beck Depression Inventory (BDI-2). The CRHR1-SNPs were genotyped on the Affymetrix Genome-Wide Human SNP Array 6.0 platform. We identified an interaction between the TAT-haplotype and childhood physical neglect. The interaction with physical neglect showed significant (P < 0.05) results in 23 of the 28 SNPs, with rs17689882 (P = 0.0013) reaching "gene-wide" significance. Although we did not replicate the specific interaction of abuse and the TAT-haplotype of the CRHR1 gene we confirmed the relevance of an interplay between variants within the CRHR1 gene and childhood adversities in the modulation of depression in adults. The largest effect was found for rs17689882, a SNP previously not analyzed. Relevant sample differences between this and prior studies like lower BDI-2 scores, less childhood maltreatment and higher psychosocial functioning may account for the differences in gene-environment interaction findings. © 2010 Wiley-Liss, Inc.
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Affiliation(s)
- Hans Jörgen Grabe
- Department of Psychiatry and Psychotherapy, University of Greifswald, Greifswald, Germany.
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ELMAS ELIF, BUGERT PETER, POPP TATJANA, LANG SIEGFRIED, WEISS CHRISTEL, BEHNES MICHAEL, BORGGREFE MARTIN, KÄLSCH THORSTEN. The P-Selectin Gene Polymorphism Val168Met: A Novel Risk Marker for the Occurrence of Primary Ventricular Fibrillation During Acute Myocardial Infarction. J Cardiovasc Electrophysiol 2010; 21:1260-5. [DOI: 10.1111/j.1540-8167.2010.01833.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Combined effects of genetic polymorphisms of P-selectin and P-selectin glycoprotein ligand-1 on the binding of platelets to monocytes. Thromb Res 2010; 125:475-7. [DOI: 10.1016/j.thromres.2009.10.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2009] [Revised: 10/09/2009] [Accepted: 10/16/2009] [Indexed: 11/23/2022]
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16
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Ghazouani L, Abboud N, Khalifa SBH, Perret C, Nicaud V, Almawi WY, Cambien F, Mahjoub T. Contribution of SELP and PSGL-1 genotypes and haplotypes to the presence of coronary heart disease in Tunisians. Mol Biol Rep 2010; 38:495-501. [PMID: 20376705 DOI: 10.1007/s11033-010-0133-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2009] [Accepted: 03/23/2010] [Indexed: 02/04/2023]
Abstract
P-selectin (SELP) and its counter-receptor, P-selectin glycoprotein ligand-1 (PSGL-1), play key role in the transient attachment of leukocytes to endothelial cells predisposing to coronary heart disease (CHD). In the current report, 293 angiographically proven CHD patients and 327 age, gender, and race-matched controls were included. Our aim was to evaluate the contribution to CHD of the following SNPs: C-2123G, G-1969A and T715P in SELP, Met62Ile and the VNTR variants in PSGL-1 gene in a North African population from Tunisia. While there were no significant differences in the distribution of SELP or PSGL-1 alleles or genotypes between patients and controls, a trend for a significant association of the C-2123G genotypes distribution with incident CHD was observed (P=0.06). Assuming an additive model of transmission, the risk was 74% higher among subjects carrying the GG genotypes in comparison to those carrying the CC genotype (OR=1.74 [1.01-2.98], P=0.04) and 80% higher in the recessive model (OR=1.80 [1.08-3.01], P=0.02). Haplotype analysis did not identify any specific SELP or PSGL-1 haplotypes to be associated with CHD. The present study demonstrated no evidence of association between individual SELP or PSGL-1 SNPs or haplotypes with incident CHD. However, this study replicates absence of association of the mostly studied SNP, T715P, previously reported in individuals with African origin.
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Affiliation(s)
- Lakhdar Ghazouani
- Research Unit of Biology and Genetics of Cancer, Haematological and Autoimmune Diseases, Monastir, 5000, Tunisia.
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Barbaux S, Poirier O, Pincet F, Hermand P, Tiret L, Deterre P. The adhesion mediated by the P-selectin P-selectin glycoprotein ligand-1 (PSGL-1) couple is stronger for shorter PSGL-1 variants. J Leukoc Biol 2010; 87:727-34. [DOI: 10.1189/jlb.0609408] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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Volcik KA, Catellier D, Folsom AR, Matijevic N, Wasserman B, Boerwinkle E. SELP and SELPLG genetic variation is associated with cell surface measures of SELP and SELPLG: the Atherosclerosis Risk in Communities Carotid MRI Study. Clin Chem 2009; 55:1076-82. [PMID: 19395438 DOI: 10.1373/clinchem.2008.119487] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND P-selectin (SELP) and its ligand, P-selectin glycoprotein ligand 1 (SELPLG), play key roles in both the inflammatory response and the atherosclerotic process. Previous studies have shown genetic variation in the SELP gene [selectin P (granule membrane protein 140 kDa, antigen CD62)] to be associated with plasma SELP concentrations; however, the major biological function of SELP (and SELPLG) is at the cell surface. We therefore investigated the association of SELP polymorphisms with platelet SELP measures and polymorphisms in the SELPLG gene (selectin P ligand) with lymphocyte, granulocyte, and monocyte SELPLG measures among 1870 participants in the Atherosclerosis Risk in Communities (ARIC) Carotid MRI Study. METHODS Whole-blood flow cytometry was used to analyze leukocyte and platelet markers in the ARIC Carotid MRI Study. The allele frequencies for the SELP and SELPLG polymorphisms of whites and African Americans were markedly different; therefore, all analyses were race specific. RESULTS SELP T715P was significantly associated with lower values for platelet SELP measures in whites (P = 0.0001), whereas SELP N562D was significantly associated with higher values for SELP measures in African Americans (P = 0.02). SELPLG M62I was significantly associated with lower granulocyte and monocyte SELPLG measures in African Americans (P = 0.003 and P = 0.0002, respectively) and with lower lymphocyte SELPLG measures in whites (P = 0.01). CONCLUSIONS Specific SELP and SELPLG polymorphisms were associated with cell surface measures of SELP and SELPLG in both whites and African Americans in the ARIC Carotid MRI Study. To our knowledge, this study is the first to examine the association of SELP and SELPLG genetic variation with measures of cell surface SELP and SELPLG.
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Affiliation(s)
- Kelly A Volcik
- Human Genetics Center, University of Texas Health Science Center School of Public Health, Houston, TX 77030, USA.
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Tauxe C, Xie X, Joffraud M, Martinez M, Schapira M, Spertini O. P-selectin glycoprotein ligand-1 decameric repeats regulate selectin-dependent rolling under flow conditions. J Biol Chem 2008; 283:28536-45. [PMID: 18713749 PMCID: PMC2661406 DOI: 10.1074/jbc.m802865200] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Revised: 08/06/2008] [Indexed: 12/23/2022] Open
Abstract
P-selectin glycoprotein ligand-1 (PSGL-1) interacts with selectins to support leukocyte rolling along vascular wall. L- and P-selectin bind to N-terminal tyrosine sulfate residues and to core-2 O-glycans attached to Thr-57, whereas tyrosine sulfation is not required for E-selectin binding. PSGL-1 extracellular domain contains decameric repeats, which extend L- and P-selectin binding sites far above the plasma membrane. We hypothesized that decamers may play a role in regulating PSGL-1 interactions with selectins. Chinese hamster ovary cells expressing wild-type PSGL-1 or PSGL-1 molecules exhibiting deletion or substitution of decamers with the tandem repeats of platelet glycoprotein Ibalpha were compared in their ability to roll on selectins and to bind soluble L- or P-selectin. Deletion of decamers abrogated soluble L-selectin binding and cell rolling on L-selectin, whereas their substitution partially reversed these diminutions. P-selectin-dependent interactions with PSGL-1 were less affected by decamer deletion. Videomicroscopy analysis showed that decamers are required to stabilize L-selectin-dependent rolling. Importantly, adhesion assays performed on recombinant decamers demonstrated that they directly bind to E-selectin and promote slow rolling. Our results indicate that the role of decamers is to extend PSGL-1 N terminus far above the cell surface to support and stabilize leukocyte rolling on L- or P-selectin. In addition, they function as a cell adhesion receptor, which supports approximately 80% of E-selectin-dependent rolling.
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Affiliation(s)
- Caroline Tauxe
- Service and Central Laboratory of Hematology, Centre Hospitalier Universitaire Vaudois, Rue du Bugnon 46, Lausanne 1011, Switzerland
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Uitte de Willige S, De Visser MCH, Vos HL, Houwing-Duistermaat JJ, Rosendaal FR, Bertina RM. Selectin haplotypes and the risk of venous thrombosis: influence of linkage disequilibrium with the factor V Leiden mutation. J Thromb Haemost 2008; 6:478-85. [PMID: 18182036 DOI: 10.1111/j.1538-7836.2007.02879.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Selectins (E-, L- and P-selectin) and their most important counter-receptor P-selectin glycoprotein ligand (SELPLG) facilitate the interaction of platelets, leukocytes and endothelial cells at inflammatory sites. Selectin polymorphisms/haplotypes have been associated with cardiovascular disease. OBJECTIVES We investigated the association between haplotypes (H) of these four genes and deep venous thrombosis (DVT) risk. We additionally explored the effect of linkage disequilibrium (LD) with the nearby Factor V Leiden mutation (FVL). Furthermore, interactions between SELPLG polymorphisms and selectin polymorphisms were investigated. PATIENTS/METHODS Leiden Thrombophilia Study (LETS) subjects were genotyped for 24 polymorphisms by TaqMan or PCR-RFLP, detecting all common haplotypes in four blocks. P-selectin was analyzed in two blocks, upstream (SELPup) and downstream (SELPdown) of the recombination hotspot. RESULTS In E- and L-selectin, none of the haplotypes was associated with DVT risk. In SELPup, H2-carriers had a 1.3-fold increased risk (95% CI, 1.0-1.7), whereas H4-carriers had a 1.4-fold decreased risk (95% CI, 0.5-1.0). In SELPdown, H2-carriers had a 1.3-fold increased risk (95% CI, 1.0-1.7). Because of LD with FVL, we subsequently excluded all FVL-carriers and all risks disappeared. Mutual adjustment within a logistic regression model resulted in disappearance of the risks for the SELP haplotypes, whereas FVL risk remained. CONCLUSIONS After adjustment for LD with FVL, none of the selectin haplotypes was associated with DVT risk, showing that the increased risks of the selectin haplotypes were a reflection of the effect of FVL on thrombosis risk.
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Affiliation(s)
- S Uitte de Willige
- Einthoven Laboratory for Experimental Vascular Medicine, Department of Thrombosis and Hemostasis, Leiden University Medical Center, Leiden, The Netherlands
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Volcik KA, Ballantyne CM, Coresh J, Folsom AR, Boerwinkle E. Specific P-selectin and P-selectin glycoprotein ligand-1 genotypes/haplotypes are associated with risk of incident CHD and ischemic stroke: the Atherosclerosis Risk in Communities (ARIC) study. Atherosclerosis 2007; 195:e76-82. [PMID: 17420019 PMCID: PMC2175083 DOI: 10.1016/j.atherosclerosis.2007.03.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Revised: 02/15/2007] [Accepted: 03/06/2007] [Indexed: 10/23/2022]
Abstract
OBJECTIVE P-selectin (PSEL) and its ligand, P-selectin glycoprotein ligand-1 (PSGL-1), play key roles in both the inflammatory response and the atherosclerotic process, but there are conflicting results regarding the affect of PSEL and PSGL-1 gene variation on risk for cardiovascular and cerebrovascular disease. We tested the association of four PSEL and two PSGL-1 polymorphisms with incident coronary heart disease (CHD) and ischemic stroke among 13,875 participants in the prospective Atherosclerosis Risk in Communities (ARIC) study. We also tested common haplotypes in the PSEL and PSGL-1 genes to assess associations with incident CHD and ischemic stroke. METHODS AND RESULTS Incident ischemic stroke and CHD were identified through annual telephone calls and hospital and death certificate surveillance. Five hundred and twenty-five validated ischemic stroke and 1654 CHD events were identified. Allele frequencies for all PSEL and PSGL-1 polymorphisms were markedly different between whites and African Americans; therefore, all analyses were performed race-specific. Independent analyses showed the PSEL 290NN genotype to be a significant predictor of CHD in whites (HRR 1.30, 95%CI 1.00-1.70, P=0.05). PSGL-1 genotypes carrying the 62I allele were significantly protective for incident CHD (HRR 0.53, 95%CI 0.31-0.92, P=0.02) and ischemic stroke (HRR 0.73, 95%CI 0.55-0.97, P=0.03) in African Americans. Haplotype analyses showed the PSEL NNVP haplotype to be a significant predictor of incident CHD in whites (HRR 2.09, 95%CI 1.23-3.55, P=0.006). No significant haplotype findings were observed in African Americans. CONCLUSIONS PSEL S290N, in single polymorphism analysis and in the haplotypic background with T715P, was associated with increased risk of incident CHD in whites. The PSGL-1 M62I polymorphism was associated with decreased risk of both incident CHD and stroke in African Americans. These findings illustrate the complex relationship between genetic variation and disease in different racial groups.
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Affiliation(s)
- Kelly A Volcik
- Human Genetics Center, University of Texas Health Science Center, Houston, TX 77030, United States.
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Diz-Kucukkaya R, Inanc M, Afshar-Kharghan V, Zhang QE, López JA, Pekcelen Y. P-selectin glycoprotein ligand-1 VNTR polymorphisms and risk of thrombosis in the antiphospholipid syndrome. Ann Rheum Dis 2007; 66:1378-80. [PMID: 17545190 PMCID: PMC1994305 DOI: 10.1136/ard.2007.075945] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVES Antiphospholipid antibodies (aPLA) have been shown to enhance thrombus formation by increasing the expression of adhesive receptors such as P-selectin on endothelial cells. The P-selectin counter-receptor on leucocytes is P-selectin glycoprotein ligand-1 (PSGL-1). We have previously described a variable number of tandem repeats (VNTR) polymorphism in the mucin-like region of PSGL-1, with three alleles: allele A, 16 repeats; allele B, 15 repeats; and allele C, 14 repeats. METHODS We compared the PSGL-1 VNTR allele and genotype frequencies in 90 patients with antiphospholipid syndrome (APS) with thrombosis, 39 patients with persistent aPLA positivity without thrombosis, and 203 healthy controls. RESULTS The frequency of the B allele was significantly higher in patients with APS with thrombosis compared with patients without thrombosis (p = 0.023). When we compared the groups by genotype frequencies, we found a markedly higher frequency of the AB genotype in patients with APS with thrombosis than in aPLA-positive patients without thrombosis (38.9% vs 10.3%, p = 0.001) or in normal population (38.9% vs 22.2%, p<0.01). CONCLUSIONS We suggest that the VNTR polymorphism of PSGL-1 is a significant determinant of thrombotic predisposition in patients with APS. Furthermore, risk appears to correlate best with the combination of alleles inherited rather than with the presence of any particular allele.
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Affiliation(s)
- Reyhan Diz-Kucukkaya
- Division of Hematology, Department of Internal Medicine, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey.
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Tregouet DA, Garelle V. A new JAVA interface implementation of THESIAS: testing haplotype effects in association studies. Bioinformatics 2007; 23:1038-9. [PMID: 17308338 DOI: 10.1093/bioinformatics/btm058] [Citation(s) in RCA: 206] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
UNLABELLED THESIAS (Testing Haplotype EffectS In Association Studies) is a popular software for carrying haplotype association analysis in unrelated individuals. In addition to the command line interface, a graphical JAVA interface is now proposed allowing one to run THESIAS in a user-friendly manner. Besides, new functionalities have been added to THESIAS including the possibility to analyze polychotomous phenotype and X-linked polymorphisms. AVAILABILITY The software package including documentation and example data files is freely available at http://genecanvas.ecgene.net. The source codes are also available upon request.
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Affiliation(s)
- D A Tregouet
- INSERM, UMR S 525 and Université Pierre et Marie Curie-Paris6, UMR S 525, Paris, France.
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Zhuo D, Madden R, Elela SA, Chabot B. Modern origin of numerous alternatively spliced human introns from tandem arrays. Proc Natl Acad Sci U S A 2007; 104:882-6. [PMID: 17210920 PMCID: PMC1783408 DOI: 10.1073/pnas.0604777104] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Despite the widespread occurrence of spliceosomal introns in the genomes of higher eukaryotes, their origin remains controversial. One model proposes that the duplication of small genomic portions could have provided the boundaries for new introns. If this mechanism has occurred recently, the 5' and 3' boundaries of each resulting intron should display distinctive sequence similarity. Here, we report that the human genome contains an excess of introns with perfect matching sequences at boundaries. One-third of these introns interrupt the protein-coding sequences of known genes. Introns with the best-matching boundaries are invariably found in tandem arrays of direct repeats. Sequence analysis of the arrays indicates that many intron-breeding repeats have disseminated in several genes at different times during human evolution. A comparison with orthologous regions in mouse and chimpanzee suggests a young age for the human introns with the most-similar boundaries. Finally, we show that these human introns are alternatively spliced with exceptionally high frequency. Our study indicates that genomic duplication has been an important mode of intron gain in mammals. The alternative splicing of transcripts containing these intron-breeding repeats may provide the plasticity required for the rapid evolution of new human proteins.
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Affiliation(s)
- Degen Zhuo
- *Laboratoire de Génomique Fonctionnelle de Sherbrooke
| | | | - Sherif Abou Elela
- *Laboratoire de Génomique Fonctionnelle de Sherbrooke
- Département de Microbiologie et d'Infectiologie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, PQ, Canada J1H 5N4
| | - Benoit Chabot
- *Laboratoire de Génomique Fonctionnelle de Sherbrooke
- Département de Microbiologie et d'Infectiologie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, PQ, Canada J1H 5N4
- To whom correspondence should be addressed. E-mail:
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Beekman M, Blauw GJ, Houwing-Duistermaat JJ, Brandt BW, Westendorp RGJ, Slagboom PE. Chromosome 4q25, microsomal transfer protein gene, and human longevity: novel data and a meta-analysis of association studies. J Gerontol A Biol Sci Med Sci 2006; 61:355-62. [PMID: 16611701 DOI: 10.1093/gerona/61.4.355] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Recently, chromosome 4q25 was linked to exceptional human longevity, and a haplotype of the positional candidate microsomal transfer protein (MTP) gene was associated to the phenotype in U.S. Caucasians. We investigated whether linkage to 4q25 could be detected in 164 nonagenarian sibships of the Leiden Longevity Study. Additionally, we compared the MTP -493G/T and Q95H allele and haplotype frequencies in the Leiden Longevity Study (379 nonagenarians, 525 of their offspring, and 251 partners of their offspring) and in the Leiden 85-Plus Study (655 octogenarians and 244 young controls). The latter study population was followed for at least 7 years, providing the opportunity to perform also prospective analyses using the longitudinal data. We found neither evidence for linkage at 4q25 nor association of the MTP locus with longevity in nonagenarian individuals. Meta-analyses of all previous studies implied that the association in U.S. Caucasians may have its source in admixture of the U.S. control population rather than in the genetic effect of the locus on exceptional longevity.
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Affiliation(s)
- Marian Beekman
- Section of Molecular Epidemiology, Department of General Internal Medicine, Leiden University Medical Center, P.O. Box 9503, 2300 RA Leiden, The Netherlands.
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Nadif R, Mintz M, Rivas-Fuentes S, Jedlicka A, Lavergne E, Rodero M, Kauffmann F, Combadière C, Kleeberger SR. Polymorphisms in chemokine and chemokine receptor genes and the development of coal workers' pneumoconiosis. Cytokine 2006; 33:171-8. [PMID: 16524739 PMCID: PMC1913495 DOI: 10.1016/j.cyto.2006.01.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2005] [Revised: 12/22/2005] [Accepted: 01/11/2006] [Indexed: 01/17/2023]
Abstract
Chemokines and their receptors are key regulators of inflammation and may participate in the lung fibrotic process. Associations of polymorphisms in CCL5 (G-403A) and its receptor CCR5 (Delta32), CCL2 (A-2578G) and CCR2 (V64I), and CX3CR1 V249I and T280M with coal worker's pneumoconiosis (CWP) were investigated in 209 miners examined in 1990, 1994 and 1999. Coal dust exposure was assessed by job history and ambient measures. The main health outcome was lung computed tomography (CT) score in 1990. Internal coherence was assessed by studying CT score in 1994, 4-year change in CT score, and CWP prevalence in 1999. CCR5 Delta32 carriers had significantly higher CT score in 1990 and 1994 (2.15 vs. 1.28, p=0.01; 3.04 vs. 1.80, p=0.04). The CX3CR1 I249 allele was significantly associated with lower 1990 CT score and lower progression in 4-year change in CT score in CCR5 Delta32 carriers only (p for interaction=0.03 and 0.02). CX3CR1 V249I was associated with lower 1999 CWP prevalence (16.7%, 13.2%, 0.0% for VV, VI and II); the effect was most evident in miners with high dust exposure (31.6%, 21.7%, 0.0%). Our findings indicate that chemokine receptors CCR5 and CX3CR1 may be involved in the development of pneumoconiosis.
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Fenoglio C, Galimberti D, Ban M, Maranian M, Scalabrini D, Venturelli E, Piccio L, De Riz M, Yeo TW, Goris A, Gray J, Bresolin N, Scarpini E, Compston A, Sawcer S. SELPLG and SELP single-nucleotide polymorphisms in multiple sclerosis. Neurosci Lett 2006; 394:92-6. [PMID: 16257118 DOI: 10.1016/j.neulet.2005.10.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2005] [Revised: 10/05/2005] [Accepted: 10/05/2005] [Indexed: 11/19/2022]
Abstract
P-Selectin (SELP) and P-selectin glycoprotein ligand-1 (SELPLG) constitute a receptor/ligand complex involved in the recruitment of activated lymphocytes, a critical event in the pathogenesis of multiple sclerosis (MS). In order to determine whether genetic variation in these pivotal molecules influences susceptibility to MS, we genotyped 214 Italian patients compared with 220 Italian controls for three single-nucleotide polymorphisms (SNPs): SELPLG Met62Ile, SELP C-2123G and SELP Thr715Pro. No significant differences in both SELP SNPs were found between patients and controls, whereas a decreased frequency of the Met62Ile SNP was found in patients versus controls in the Italian population (P = 0.025). To confirm these preliminary findings, the Met62Ile SNP was analysed in 938 UK trio families. This SNP did not show evidence for association with susceptibility to MS in the larger UK cohort. Therefore, none of the SNPs investigated is associated with MS, although this analysis does not conclusively exclude SELPLG and SELP as genetic risk factors for MS as much variation remains untested.
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Affiliation(s)
- Chiara Fenoglio
- Department of Neurological Sciences, Dino Ferrari Center, University of Milan, IRCCS Ospedale Maggiore Policlinico, Italy
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Nadif R, Mintz M, Jedlicka A, Bertrand JP, Kleeberger SR, Kauffmann F. Association of CAT polymorphisms with catalase activity and exposure to environmental oxidative stimuli. Free Radic Res 2005; 39:1345-50. [PMID: 16298864 PMCID: PMC1877822 DOI: 10.1080/10715760500306711] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We tested the hypotheses that catalase activity is modified by CAT single nucleotide polymorphisms (SNPs) (-262;-844), and by their interactions with oxidant exposures (coal dusts, smoking), lymphotoxin alpha (LTA, NcoI) and tumor necrosis factor (TNF, -308) in 196 miners. Erythrocyte catalase, superoxide dismutase, and glutathione peroxidase activities were measured. The CAT -262 SNP was related to lower catalase activity (104, 87 and 72 k/g hemoglobin for CC, CT and TT, respectively, p < 0.0001). Regardless of CAT SNPs, the LTA NcoI but not the TNF-308 SNP was associated with catalase activity (p = 0.04 and p = 0.8). CAT -262 T carriers were less frequent in highly exposed miners (OR = 0.39 [0.20-0.78], p = 0.007). In CAT -262 T carriers only, catalase activity decreased with high dust exposure (p = 0.01). Haplotype analyses (combined CAT SNPs) confirm these results. Results show that CAT -262 and LTA NcoI SNPs, and interaction with coal dust exposure, influenced catalase activity.
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Scalabrini D, Galimberti D, Fenoglio C, Comi C, De Riz M, Venturelli E, Castelli L, Piccio L, Ronzoni M, Lovati C, Mariani C, Monaco F, Bresolin N, Scarpini E. P-selectin glycoprotein ligand-1 variable number of tandem repeats (VNTR) polymorphism in patients with multiple sclerosis. Neurosci Lett 2005; 388:149-52. [PMID: 16039046 DOI: 10.1016/j.neulet.2005.06.059] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2005] [Revised: 06/25/2005] [Accepted: 06/27/2005] [Indexed: 11/21/2022]
Abstract
P-selectin glycoprotein ligand-1 (PSGL-1) is an important adhesion molecule involved in lymphocyte recruitment into the brain, which represents a crucial step in the pathogenesis of multiple sclerosis (MS). Three hundred twenty-one MS patients and 342 controls were genotyped for the presence of a polymorphism in the PSGL-1 gene, consisting of a variable number of tandem repeats (VNTR) originating three possible alleles: A, B and C, in order to test whether they influence the susceptibility and the course of the disease. No significant differences among allelic frequencies of A, B and C alleles in MS as compared with controls were observed. Stratifying patients according to the course of the disease, a significantly increased frequency of the shortest C allele in PP-MS was found (7.1%), either in comparison with controls (P=0.011) or with all other MS patients, who had acute inflammatory attacks at onset and an initial RR form (P=0.036). Besides, none of SP-MS patients was a carrier of the C allele and B carriers converted later from RR to SP course as compared with A/A subjects (after 15.8 rather than 8.8 years, P=0.01). In conclusion, the C allele of the VNTR polymorphism in PSGL-1 is likely to be associated with PP-MS. As this allele has been demonstrated to have a very low efficiency in mediating lymphocyte binding to brain endothelium during attacks, its high frequency in PP-MS could be related to the absence of exacerbations in such patients.
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Affiliation(s)
- Diego Scalabrini
- Department of Neurological Sciences, "Dino Ferrari" Center, University of Milan, IRCCS Ospedale Maggiore Policlinico, Via F. Sforza, 35, 20122 Milan, Italy
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Tregouet DA, Tiret L. Cox proportional hazards survival regression in haplotype-based association analysis using the Stochastic-EM algorithm. Eur J Hum Genet 2005; 12:971-4. [PMID: 15241485 DOI: 10.1038/sj.ejhg.5201238] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
It is now widely recognized that haplotype information inferred from genotypes can be of great interest to better characterize the role of a candidate gene in the etiology of a complex trait in the context of association studies. Several works have recently advocated the simultaneous estimation of haplotype frequencies and haplotype effects in order to get a better efficiency in parameter estimation. Most of the available models can deal with a binary or a quantitative phenotype, but none has yet discussed the application of haplotype-based association analysis to a survival outcome. We describe how the recently proposed Stochastic-EM (SEM) algorithm can be applied to estimate haplotype effects in censored data analysis using a standard Cox proportional hazards formulation. This model has been implemented in the THESIAS software freely available at http://www.genecanvas.org.
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Tahri-Daizadeh N, Tregouet DA, Nicaud V, Poirier O, Cambien F, Tiret L. Exploration of multilocus effects in a highly polymorphic gene, the apolipoprotein (APOB) gene, in relation to plasma apoB levels. Ann Hum Genet 2005; 68:405-18. [PMID: 15469418 DOI: 10.1046/j.1529-8817.2004.00107.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A detailed exploration of all the polymorphisms in candidate genes is required to better characterize the relationship between gene variability and complex traits. We propose a novel strategy for investigating the association between a highly polymorphic gene and a phenotype, by combining a multilocus genotype analysis and an haplotype analysis. For the multilocus genotype analysis, a data mining tool--termed DICE (Detection of Informative Combined Effects)--was developed to identify the best subset of polymorphisms that are associated--individually or in combination--with the phenotype. For the haplotype analysis, we used our recently developed method of haplotype-phenotype association to determine the most informative and parsimonious haplotype model fitting the data. We illustrate this strategy by investigating the association between twelve polymorphisms of the APOB gene and plasma apoB levels in 1442 European subjects. After exploring all main effects and interactions between polymorphisms, DICE identified the N4311S polymorphism as the most informative polymorphism in relation to apoB levels. Haplotype analysis led to the same conclusion. Additionally, DICE identified the E4154K (EcoRI) and the T2488T (XbaI) polymorphisms as potentially interesting. This selection was not modified by inclusion of the common APOE polymorphism in the analysis.
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Affiliation(s)
- N Tahri-Daizadeh
- INSERM U525, Faculté de Médecine, Hôpital Pitié-Salpêtrière, 91 Bld de l'Hôpital, 75634 Paris, France
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Tregouet DA, Ricard S, Nicaud V, Arnould I, Soubigou S, Rosier M, Duverger N, Poirier O, Macé S, Kee F, Morrison C, Denèfle P, Tiret L, Evans A, Deleuze JF, Cambien F. In-Depth Haplotype Analysis of ABCA1 Gene Polymorphisms in Relation to Plasma ApoA1 Levels and Myocardial Infarction. Arterioscler Thromb Vasc Biol 2004; 24:775-81. [PMID: 14962947 DOI: 10.1161/01.atv.0000121573.29550.1a] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE By regulating the cellular cholesterol efflux from peripheral cells to high-density lipoprotein, the ABCA1 protein is suspected to play a key role in lipid homeostasis and atherosclerosis. Twenty-six polymorphisms of the ABCA1 gene were genotyped and tested for association with plasma levels of ApoA1 and myocardial infarction (MI) in the ECTIM study. METHODS AND RESULTS In addition to single-locus analysis, a systematic exploration of all possible haplotype effects was performed, with this exploration being performed on a minimal set of "tag" polymorphisms that define the haplotype structure of the gene. Two polymorphisms were associated with plasma levels of ApoA1, 1 in the promoter (C-564T) and 1 in the coding (R1587K) regions, whereas only 1 polymorphism (R219K) was associated with the risk of MI. However, no haplotype effect was detected on ApoA1 variability or on the risk of MI. CONCLUSIONS ABCA1 gene polymorphisms but not haplotypes are involved in the variability of plasma ApoA1 and the susceptibility to coronary artery disease.
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Bugert P, Vosberg M, Entelmann M, Jahn J, Katus HA, Klüter H. Polymorphisms in the P-selectin (CD62P) and P-selectin glycoprotein ligand-1 (PSGL-1) genes and coronary heart disease. ACTA ACUST UNITED AC 2004; 42:997-1004. [PMID: 15497463 DOI: 10.1515/cclm.2004.202] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
AbstractP-selectin and its ligand, PSGL-1, are cell adhesion molecules that facilitate interaction of platelets, leukocytes and endothelial cells. Polymorphisms of these genes have been reported to be associated with coronary heart disease (CHD). In the present study, we characterized the entire coding regions of
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Affiliation(s)
- Peter Bugert
- Institute of Transfusion Medicine and Immunology, Red Cross Blood Service of Baden-Württemberg--Hessia, Ruprecht Karls-University Heidelberg, Faculty of Clinical Medicine Mannheim, Mannheim, Germany.
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