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Lokki A, Triebwasser M, Daly E, Cohort F, Kurki M, Perola M, Auro K, Salmon J, Java A, Daly M, Atkinson J, Laivuori H, Meri S. Rare variants in genes coding for components of the terminal pathway of the complement system in preeclampsia. RESEARCH SQUARE 2024:rs.3.rs-4121735. [PMID: 38645143 PMCID: PMC11030519 DOI: 10.21203/rs.3.rs-4121735/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
Preeclampsia is a common multifactorial disease of pregnancy. Dysregulation of the complement activation is among emerging candidates responsible for disease pathogenesis. In a targeted exomic sequencing study we identified 14 variants within nine genes coding for components of the membrane attack complex (MAC, C5b-9) that are associated with preeclampsia. We found two rare missense variants in the C5 gene that predispose to preeclampsia (rs200674959: I1296V, OR (CI95) = 24.13 (1.25-467.43), p-value = 0.01 and rs147430470: I330T, OR (CI95) = 22.75 (1.17-440.78), p-value = 0.01). In addition, one predisposing rare variant and one protective rare variant were discovered in C6 (rs41271067: D396G, OR (CI95) = 2.93 (1.18-7.10), p-value = 0.01 and rs114609505: T190I, 0.02 OR (CI95) = 0.47 (0.22-0.92), p-value = 0.02). The results suggest that variants in terminal complement pathway predispose to preeclampsia.
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Cai G, Li L, Chen Y, Huang H, Yu L, Xu L. Complement C3 gene polymorphisms are associated with lipid levels, but not the risk of coronary artery disease: a case-control study. Lipids Health Dis 2019; 18:217. [PMID: 31829184 PMCID: PMC6905069 DOI: 10.1186/s12944-019-1163-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 11/29/2019] [Indexed: 11/16/2022] Open
Abstract
Background Coronary artery disease (CAD) is the leading cause of mortality and morbidity worldwide. Previous studies have shown that complement component 3 (C3) is associated with atherosclerosis and cardiovascular risk factors. Methods We conducted this study to evaluate the associations between tagSNPs in the C3 gene locus and the CAD susceptibility and lipid levels in the Chinese population. A hospital-based case-control study, including 1017 subjects (580 CAD patients and 437 non-CAD controls), was conducted. TagSNPs in the C3 gene were searched and genotyped by using the polymerase chain reaction-ligase detection reaction method. Results The C3 levels were positively associated with the low-density lipoprotein cholesterol (LDL-C) levels (r = 0.269, P = 0.001). Compared with those in controls, the serum C3 levels in CAD patients were significantly higher (Control: 0.94 + 0.14 g/l; CAD: 1.10 + 0.19 g/l, P < 0.001). No significant differences in genotype or allele frequencies were observed between CAD patients and controls. The minor T allele of rs2287848 was associated with low apolipoprotein A1 (ApoA1) levels in controls (Bonferroni corrected P, Pc = 0.032). Linkage disequilibrium and haplotype analysis established two haplotype blocks (Block1: rs344555-rs2277984, Block 2: rs2287848-rs11672613) and six haplotypes. No significant associations between haplotypes and the risk of CAD were observed (all Pc > 0.05). Conclusions The results revealed that C3 gene polymorphisms were associated with the lipid levels, but not CAD susceptibility in the Chinese population.
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Affiliation(s)
- Gaojun Cai
- Department of Cardiology, Wujin hospital affiliated with Jiangsu University, the Wujin Clinical college of Xuzhou Medical University, Changzhou, Jiangsu Province, 213017, China.
| | - Li Li
- Department of Cardiology, Wujin hospital affiliated with Jiangsu University, the Wujin Clinical college of Xuzhou Medical University, Changzhou, Jiangsu Province, 213017, China
| | - Yifei Chen
- Department of Emergency, the affiliated hospital of Yangzhou university, Yangzhou, Jiangsu Province, 225001, China
| | - Haomin Huang
- Department of Cardiology, Wujin hospital affiliated with Jiangsu University, the Wujin Clinical college of Xuzhou Medical University, Changzhou, Jiangsu Province, 213017, China
| | - Lei Yu
- Department of Cardiology, Wujin hospital affiliated with Jiangsu University, the Wujin Clinical college of Xuzhou Medical University, Changzhou, Jiangsu Province, 213017, China
| | - Lianhong Xu
- Department of laboratory, Wujin hospital affiliated with Jiangsu University, the Wujin Clinical college of Xuzhou Medical University, Changzhou, Jiangsu Province, 213017, China
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El-Shamy A, Branch AD, Schiano TD, Gorevic PD. The Complement System and C1q in Chronic Hepatitis C Virus Infection and Mixed Cryoglobulinemia. Front Immunol 2018; 9:1001. [PMID: 29910796 PMCID: PMC5992393 DOI: 10.3389/fimmu.2018.01001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 04/23/2018] [Indexed: 12/17/2022] Open
Abstract
The complement system bridges innate and adaptive immunity against microbial infections, with viral infection being a major trigger. Activation of the classical, alternative, and lectin pathways have been reported in chronic hepatitis C virus (HCV) infection and/or cryoglobulinemia. HCV infection leads to dysregulation of complement-mediated immune responses. Clinical and experimental evidence support involvement of complement in intra- and extrahepatic manifestations of HCV infection, such as liver fibrosis and type II cryoglobulinemia. In this review, we summarize studies that have investigated the interplay between HCV and the complement system to establish chronic infection and autoimmunity, as well as the association between HCV pathogenesis and abnormal complement profiles. Several unanswered questions are highlighted which suggest additional informative lines of investigation.
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Affiliation(s)
- Ahmed El-Shamy
- Division of Liver Disease, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States.,Department of Pharmaceutical and Biological Sciences, California Northstate University, Elk Grove, CA, United States
| | - Andrea D Branch
- Division of Liver Disease, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Thomas D Schiano
- Division of Liver Disease, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Peter D Gorevic
- Division of Rheumatology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
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Page MJ, Bester J, Pretorius E. The inflammatory effects of TNF-α and complement component 3 on coagulation. Sci Rep 2018; 8:1812. [PMID: 29379088 PMCID: PMC5789054 DOI: 10.1038/s41598-018-20220-8] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 01/16/2018] [Indexed: 12/24/2022] Open
Abstract
Tissue necrosis factor-α (TNF-α) and complement component 3 (C3) are two well-known pro-inflammatory molecules. When TNF-α is upregulated, it contributes to changes in coagulation and causes C3 induction. They both interact with receptors on platelets and erythrocytes (RBCs). Here, we look at the individual effects of C3 and TNF-α, by adding low levels of the molecules to whole blood and platelet poor plasma. We used thromboelastography, wide-field microscopy and scanning electron microscopy to study blood clot formation, as well as structural changes to RBCs and platelets. Clot formation was significantly different from the naïve sample for both the molecules. Furthermore, TNF-α exposure to whole blood resulted in platelet clumping and activation and we noted spontaneous plasma protein dense matted deposits. C3 exposure did not cause platelet aggregation, and only slight pseudopodia formation was noted. Therefore, although C3 presence has an important function to cause TNF-α release, it does not necessarily by itself cause platelet activation or RBC damage at these low concentrations. We conclude by suggesting that our laboratory results can be translated into clinical practice by incorporating C3 and TNF-α measurements into broad spectrum analysis assays, like multiplex technology, as a step closer to a patient-orientated, precision medicine approach.
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Affiliation(s)
- Martin J Page
- Department of Physiological Sciences, Stellenbosch University, Stellenbosch, Private Bag X1, MATIELAND, 7602, South Africa
| | - Janette Bester
- Department of Physiology, University of Pretoria, Pretoria, 0007, South Africa
| | - Etheresia Pretorius
- Department of Physiological Sciences, Stellenbosch University, Stellenbosch, Private Bag X1, MATIELAND, 7602, South Africa.
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Wang Z, Yang H, Guo M, Han Z, Tao J, Chen H, Ge Y, Wang K, Tan R, Wei JF, Gu M. Impact of complement component 3/4/5 single nucleotide polymorphisms on renal transplant recipients with antibody-mediated rejection. Oncotarget 2017; 8:94539-94553. [PMID: 29212248 PMCID: PMC5706894 DOI: 10.18632/oncotarget.21788] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 09/24/2017] [Indexed: 01/29/2023] Open
Abstract
Antibody-mediated rejection (ABMR) is an important risk of allograft dysfunction in kidney transplantation. The complement system is considered to be associated with the generation of alloreative antibodies and donor-specific antibodies. However, the association of complement single nucleotide polymorphisms (SNPs) with ABMR still remained unclear. Blood samples of 199 renal transplant recipients containing 68 with ABMR and 131 with stable graft function were collected, and analyzed by next-generation sequencing with an established gene panel. High quality readout was obtained in 18 C3 SNPs, 9 C4 SNPs and 22 C5 SNPs. Concerning C3 gene polymorphisms, after being adjusted with age, sex and immunosuppressive protocols, rs10411506 and rs2230205 were found to be statistically associated with ABMR in dominant model (rs10411506: OR=2.73, 95% CIs: 1.16, 6.68, P=0.028; rs2230205: OR=2.52, 95% CIs: 1.07, 5.92, P=0.034); rs10411506, rs2230205 and rs2230201 were found different in HET model (rs10411506: OR=3.05, 95% CIs: 1.22, 7.64, P=0.017; rs2230205: OR=2.90, 95% CIs: 1.20, 7.00, P=0.018; rs2230201: OR=2.41, 95% CIs: 1.03, 5.64, P=0.042). The linkage analysis showed relatively high linkage disequilibrium among these SNPs. In addition, no significant correlation was found between C4 SNPs, or C5 SNPs, and the development of ABMR. Our study firstly identified the two SNPs (rs10411506 and rs2230205) in C3 gene were statistically correlated with ABMR in kidney transplantation. These findings may have implications for the diagnosis and prevention of ABMR.
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Affiliation(s)
- Zijie Wang
- Department of Urology, Nanjing Medical University First Affiliated Hospital, Nanjing 210029, P.R. China
| | - Haiwei Yang
- Department of Urology, Nanjing Medical University First Affiliated Hospital, Nanjing 210029, P.R. China
| | - Miao Guo
- Research Division of Clinical Pharmacology, Nanjing Medical University First Affiliated Hospital, Nanjing 210029, P.R. China
| | - Zhijian Han
- Department of Urology, Nanjing Medical University First Affiliated Hospital, Nanjing 210029, P.R. China
| | - Jun Tao
- Department of Urology, Nanjing Medical University First Affiliated Hospital, Nanjing 210029, P.R. China
| | - Hao Chen
- Department of Urology, Nanjing Medical University First Affiliated Hospital, Nanjing 210029, P.R. China
| | - Yuqiu Ge
- School of Public Health, Nanjing Medical University, Nanjing 211166, P.R. China
| | - Ke Wang
- Department of Urology, Nanjing Medical University First Affiliated Hospital, Nanjing 210029, P.R. China
| | - Ruoyun Tan
- Department of Urology, Nanjing Medical University First Affiliated Hospital, Nanjing 210029, P.R. China
| | - Ji-Fu Wei
- Research Division of Clinical Pharmacology, Nanjing Medical University First Affiliated Hospital, Nanjing 210029, P.R. China
| | - Min Gu
- Department of Urology, Nanjing Medical University First Affiliated Hospital, Nanjing 210029, P.R. China
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