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Schauren JDS, de Oliveira AH, Consiglio CR, Monticielo OA, Xavier RM, Nunes NS, Ellwanger JH, Chies JAB. CCR5 promoter region polymorphisms in systemic lupus erythematosus. Int J Immunogenet 2024; 51:20-31. [PMID: 37984413 DOI: 10.1111/iji.12646] [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: 09/19/2023] [Revised: 10/26/2023] [Accepted: 11/09/2023] [Indexed: 11/22/2023]
Abstract
This study investigated the impacts of CCR5 promoter region polymorphisms on the development of systemic lupus erythematosus (SLE) by comparing CCR5 genotypes and haplotypes from SLE patients with ethnically matched controls. A total of 382 SLE patients (289 European-derived and 93 African-derived) and 375 controls (243 European-derived and 132 African-derived) were genotyped for the CCR2-64I G > A (rs1799864), CCR5-59353 C > T (rs1799988), CCR5-59356 C > T (rs41469351), CCR5-59402 A > G (rs1800023) and CCR5-59653 C > T (rs1800024) polymorphisms through polymerase chain reaction-restriction fragment length polymorphism and direct sequencing. Previous data from CCR5Δ32 analysis was included in the study to infer the CCR5 haplotypes and as a possible confounding factor in the binary logistic regression. European-derived patients showed a higher frequency of CCR5 wild-type genotype (conversely, a reduced frequency of Δ32 allele) and a reduced frequency of the HHG*2 haplotype compared to controls; both factors significantly affecting disease risk [p = .003 (OR 3.5, 95%CI 1.6-7.5) and 2.0% vs. 7.2% (residual p = 2.9E - 5), respectively]. Additionally, the HHA/HHB, HHC and HHG*2 haplotype frequencies differed between African-derived patients and controls [10% vs. 20.5% (residual p = .003), 29.4% vs. 17.4% (residual p = .003) and 3.9% vs. 0.8% (residual p = .023), respectively]. Considering the clinical manifestations of the disease, the CCR5Δ32 presence was confirmed as a susceptibility factor to class IV nephritis in the African-derived group and when all patients were grouped for comparison [pcorrected = .012 (OR 3.0; 95%CI 3.0-333.3) and pcorrected = .0006 (OR 6.8; 95%CI 1.9-24.8), respectively]. In conclusion, this study indicates that CCR5 promoter polymorphisms are important disease modifiers in SLE. Present data reinforces the CCR5Δ32 polymorphism as a protective factor for the development of the disease in European-derived patients and as a susceptibility factor for class IV nephritis in African-derived patients. Furthermore, we also described a reduced frequency of HHA/HHB and an increased frequency of HHC and HHG*2 haplotypes in African-derived patients, which could modify the CCR5 protein expression in specific cell subsets.
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Affiliation(s)
- Juliana da Silveira Schauren
- Laboratory of Immunobiology and Immunogenetics, Department of Genetics, Postgraduate Program in Genetics and Molecular Biology (PPGBM), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Amanda Henrique de Oliveira
- Laboratory of Immunobiology and Immunogenetics, Department of Genetics, Postgraduate Program in Genetics and Molecular Biology (PPGBM), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
- Postgraduate Program in Gastroenterology and Hepatology Sciences, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Camila Rosat Consiglio
- Laboratory of Immunobiology and Immunogenetics, Department of Genetics, Postgraduate Program in Genetics and Molecular Biology (PPGBM), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Odirlei André Monticielo
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Ricardo Machado Xavier
- Division of Rheumatology, Department of Internal Medicine, Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Natália Schneider Nunes
- Postgraduate Program in Gastroenterology and Hepatology Sciences, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
- Center for Immuno-Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Joel Henrique Ellwanger
- Laboratory of Immunobiology and Immunogenetics, Department of Genetics, Postgraduate Program in Genetics and Molecular Biology (PPGBM), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - José Artur Bogo Chies
- Laboratory of Immunobiology and Immunogenetics, Department of Genetics, Postgraduate Program in Genetics and Molecular Biology (PPGBM), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
- Postgraduate Program in Gastroenterology and Hepatology Sciences, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
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Variability of the rs333 in Polish patients with lupus erythematosus. Postepy Dermatol Alergol 2021; 38:131-136. [PMID: 34408579 PMCID: PMC8362790 DOI: 10.5114/ada.2021.104288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 09/25/2020] [Indexed: 11/22/2022] Open
Abstract
Introduction Lupus erythematosus (LE) is an autoimmune disease with a strong influence of genetic and environmental factors. C-C motif chemokine receptor 5 (CCR5) gene expression may affect the development and intensity of LE. Aim To evaluate the possible association between the 32bp deletion in rs333 locus located within the CCR5 gene and the development of LE or the occurrence of various clinical symptoms in the course of the disease. Material and methods One hundred and twenty patients with LE (77 with systemic lupus erythematosus (SLE) and 43 with discoid lupus erythematosus (DLE)) and 100 healthy controls from the Polish population were genotyped for deletion in rs333. Results 32 bp deletion in the rs333 was significantly more frequent among healthy individuals than DLE patients. Moreover, heterozygotes and homozygotes with deletion in rs333 were significantly more frequent within the control group than the group of patients with discoid lupus erythematosus. In contrast, any statistically significant differences in allele or genotype frequencies between healthy persons and SLE patients were observed. Furthermore, nucleotide sequence variability of rs333 was not associated with certain clinical symptoms of LE patients. Conclusions Deletion in the rs333 might be a protective factor for DLE, but not SLE in the Polish population. Nevertheless further studies performed on larger populations are needed to confirm these observations.
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Rzeszotarska E, Sowinska A, Stypinska B, Walczuk E, Wajda A, Lutkowska A, Felis-Giemza A, Olesinska M, Puszczewicz M, Majewski D, Jagodzinski PP, Czerewaty M, Malinowski D, Pawlik A, Jaronczyk M, Paradowska-Gorycka A. The Role of MECP2 and CCR5 Polymorphisms on the Development and Course of Systemic Lupus Erythematosus. Biomolecules 2020; 10:biom10030494. [PMID: 32214033 PMCID: PMC7175371 DOI: 10.3390/biom10030494] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/19/2020] [Accepted: 03/22/2020] [Indexed: 12/14/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is a chronic and systemic autoimmune disease. SLE is described by production of autoantibodies and causes damage of many organs. T-cells play a crucial role in SLE pathogenesis. T-cells intensify inflammation through a number of processes, which leads to autoimmunization. CCR5 and MECP2 genes are linked with T-cells and pathogenesis of SLE. Polymorphisms in these genes are related with the prognostic factors of risk of disease onset and disease severity. The aim of this study was to estimate the influence of polymorphisms in MECP2 and CCR5 genes on the development and course of systemic lupus erythematosus. We examined 137 SLE patients and 604 healthy controls. We studied polymorphisms for CCR5 gene: rs333 and for MECP2: rs2075596, rs1734787, rs17435, and rs2239464. We genotyped our MECP2 samples and we performed a restriction fragment length polymorphism (RFLP) analysis for CCR5 samples. We showed a risk factor for allele T in rs17435 and for allele A in rs2075596 in MECP2. We noticed that MECP2 rs2075596 G/A, rs1734787 C/A, rs17435 A/T, and rs2239464 G/A polymorphisms are more prevalent in SLE patients than in healthy controls. We believe that above-mentioned MECP2 polymorphisms can be considered as SLE susceptibility factor.
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Affiliation(s)
- Ewa Rzeszotarska
- Department of Molecular Biology, National Institute of Geriatrics, Rheumatology and Rehabilitation, 02-637 Warsaw, Poland; (E.R.); (B.S.); (E.W.); (A.W.)
| | - Anna Sowinska
- Department of Computer Science and Statistics, Poznan University of Medical Sciences, 60-806 Poznan, Poland;
| | - Barbara Stypinska
- Department of Molecular Biology, National Institute of Geriatrics, Rheumatology and Rehabilitation, 02-637 Warsaw, Poland; (E.R.); (B.S.); (E.W.); (A.W.)
| | - Ewa Walczuk
- Department of Molecular Biology, National Institute of Geriatrics, Rheumatology and Rehabilitation, 02-637 Warsaw, Poland; (E.R.); (B.S.); (E.W.); (A.W.)
| | - Anna Wajda
- Department of Molecular Biology, National Institute of Geriatrics, Rheumatology and Rehabilitation, 02-637 Warsaw, Poland; (E.R.); (B.S.); (E.W.); (A.W.)
| | - Anna Lutkowska
- Department of Biochemistry and Molecular Biology, Poznan University of Medical Sciences, 60-781 Poznan, Poland; (A.L.); (P.P.J.)
| | - Anna Felis-Giemza
- Department of Connective Tissue Diseases, National Institute of Geriatrics, Rheumatology and Rehabilitation, 02-637 Warsaw, Poland; (A.F.-G.); (M.O.)
| | - Marzena Olesinska
- Department of Connective Tissue Diseases, National Institute of Geriatrics, Rheumatology and Rehabilitation, 02-637 Warsaw, Poland; (A.F.-G.); (M.O.)
| | - Mariusz Puszczewicz
- Department of Rheumatology and Internal Diseases, Poznan University of Medical Science, 61-545 Poznan, Poland; (M.P.); (D.M.)
| | - Dominik Majewski
- Department of Rheumatology and Internal Diseases, Poznan University of Medical Science, 61-545 Poznan, Poland; (M.P.); (D.M.)
| | - Pawel Piotr Jagodzinski
- Department of Biochemistry and Molecular Biology, Poznan University of Medical Sciences, 60-781 Poznan, Poland; (A.L.); (P.P.J.)
| | - Michal Czerewaty
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (M.C.); (A.P.)
| | - Damian Malinowski
- Department of Pharmacokinetics and Therapeutic Drug Monitoring, Pomeranian Medical University, 70-111 Szczecin, Poland;
| | - Andrzej Pawlik
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland; (M.C.); (A.P.)
| | - Malgorzata Jaronczyk
- Department of Drug Biotechnology and Bioinformatics, National Medicines Institute, 30/34 Chelmska Str., 00-725 Warsaw, Poland;
| | - Agnieszka Paradowska-Gorycka
- Department of Molecular Biology, National Institute of Geriatrics, Rheumatology and Rehabilitation, 02-637 Warsaw, Poland; (E.R.); (B.S.); (E.W.); (A.W.)
- Correspondence:
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Lan Y, Wang Y, Liu Y. CCR5 silencing reduces inflammatory response, inhibits viability, and promotes apoptosis of synovial cells in rat models of rheumatoid arthritis through the MAPK signaling pathway. J Cell Physiol 2019; 234:18748-18762. [DOI: 10.1002/jcp.28514] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 02/14/2019] [Accepted: 02/19/2019] [Indexed: 02/05/2023]
Affiliation(s)
- You‐Yu Lan
- Department of Rheumatology and Immunology West China Hospital, Sichuan University Chengdu China
- Department of Rheumatology and Immunology, The Affiliated Hospital of Southwest Medical University Luzhou China
| | - You‐Qiang Wang
- Department of Laboratory Medicine The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University Luzhou China
| | - Yi Liu
- Department of Rheumatology and Immunology West China Hospital, Sichuan University Chengdu China
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Cheng FJ, Zhou XJ, Zhao YF, Zhao MH, Zhang H. Chemokine receptor 5 (CCR5) delta 32 polymorphism in lupus nephritis: a large case-control study and meta-analysis. Autoimmunity 2014; 47:383-8. [PMID: 24720467 DOI: 10.3109/08916934.2014.906581] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Recent animal experiments showed that CCR5-deficient lupus mice (CCR5(-/-)) were closely associated with aggravated lupus nephritis. CCR5 Δ32 variation, a nonsynonymous mutation of CCR5, resulted in altered CCR5 function. However, the CCR5 Δ32 mutation in human lupus nephritis has been rarely reported in the literature. METHODS A large case-control study that included 2010 samples from a Chinese population was conducted, followed by a meta-analysis combining the current and previously published studies to explore the effect of CCR5 Δ32 on lupus nephritis susceptibility. RESULTS Four CCR5 Δ32 heterozygote carriers were detected in lupus nephritis patients only. We detected no CCR5 Δ32 homozygotes in our study population. In the meta-analysis, including 1,092 cases and 2,229 controls, we found great heterogeneity between studies (p < 0.001, I(2)( )= 89.6%). Furthermore, stratified and sensitivity analyses suggested that ethnicity and CCR5 Δ32 allele frequency were the main origin of heterogeneity. In the subgroups without obvious heterogeneity, we observed a positive correlation between CCR5 Δ32 and lupus nephritis risk (p < 0.05). CONCLUSIONS Our study confirmed that the CCR5 Δ32 mutation is a very rare variation found in the Chinese population with Han ethnicity. However, CCR5 Δ32 might play a role in lupus nephritis susceptibility. Future replications and functional studies are needed.
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Affiliation(s)
- Fa-Juan Cheng
- Renal Division, Department of Medicine, Peking University First Hospital , Beijing , China
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Tschammer N, Kokornaczyk AK, Strunz AK, Wünsch B. Selective and Dual Targeting of CCR2 and CCR5 Receptors: A Current Overview. CHEMOKINES 2014; 14. [PMCID: PMC7123309 DOI: 10.1007/7355_2014_40] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The chemokine receptor 2 (CCR2) and chemokine receptor 5 (CCR5) are important mediators of leukocyte trafficking in inflammatory processes. The emerging evidence for a role of CCR2 and CCR5 receptors in human inflammatory diseases led to a growing interest in CCR2- and CCR5-selective antagonists. In this review, we focus on the recent development of selective CCR2/CCR5 receptor ligands and dual antagonists. Several compounds targeting CCR2, e.g., INCB8761 and MK0812, were developed as promising candidates for clinical trials, but failed to show clinical efficacy as presumed from preclinical models. The role of CCR5 receptors as the second co-receptor for the HIV-host cell fusion led to the development of various CCR5-selective ligands. Maraviroc is the first CCR5-targeting drug for the treatment of HIV-1 infections on the market. The role of CCR5 receptors in the progression of inflammatory processes fueled the use of CCR5 antagonists for the treatment of rheumatoid arthritis. Unfortunately, the use of maraviroc for the treatment of rheumatoid arthritis failed due to its inefficacy. Some of the ligands, e.g., TAK-779 and TAK-652, were also found to be dual antagonists of CCR2 and CCR5 receptors. The fact that CCR2 and CCR5 receptor antagonists contribute to the treatment of inflammatory diseases renders the development of dual antagonists as promising novel therapeutic strategy.
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Affiliation(s)
- Nuska Tschammer
- Dept. of Chemistry and Pharmacy, Friedrich Alexander University, Erlangen, Germany
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Junker A, Schepmann D, Yamaguchi J, Itami K, Faust A, Kopka K, Wagner S, Wünsch B. Diverse modifications of the 4-methylphenyl moiety of TAK-779 by late-stage Suzuki–Miyaura cross-coupling. Org Biomol Chem 2014; 12:177-86. [DOI: 10.1039/c3ob41873a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Carvalho C, Calvisi SL, Leal B, Bettencourt A, Marinho A, Almeida I, Farinha F, Costa PP, Silva BM, Vasconcelos C. CCR5-Delta32: implications in SLE development. Int J Immunogenet 2013; 41:236-41. [PMID: 24164722 DOI: 10.1111/iji.12094] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 08/13/2013] [Accepted: 08/25/2013] [Indexed: 11/30/2022]
Abstract
Systemic lupus erythematosus (SLE) is a prototypical autoimmune disease with strong genetic and environmental components. Previous studies have shown increased levels of several chemokines in active SLE. C-C chemokine receptor type 5 (CCR5) is involved in the recruitment of inflammatory cells into tissues, and mechanisms modulating CCR5 expression and function may interfere in SLE development, influencing the clinical course of the disease. The aim of this study was to evaluate the possible association between the CCR5∆32 base-pair deletion polymorphism and SLE disease in a group of Portuguese patients. A total of 219 patients with SLE and 205 healthy individuals were studied. The frequency of CCR5/∆32 heterozygotes was lower in patients with SLE than in controls (8% vs. 15% OR = 0.5162; P = 0.0319), suggesting a protective association between CCR5∆32 allele and SLE. These results highlight the protective role of Th1 cells that express CCR5 in SLE pathogenesis.
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Affiliation(s)
- C Carvalho
- UMIB, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS) UPorto, Porto, Portugal
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Schauren JS, Marasca JA, Veit TD, Monticielo OA, Xavier RM, Brenol JCT, Chies JAB. CCR5delta32 in systemic lupus erythematosus: implications for disease susceptibility and outcome in a Brazilian population. Lupus 2013; 22:802-9. [PMID: 23753295 DOI: 10.1177/0961203313491848] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The aim of this study was to analyze the allelic and genotypic frequencies of the CCR5delta32 polymorphism in systemic lupus erythematosus (SLE) patients and to investigate a possible association of this allele with SLE susceptibility and clinical outcome. A total of 367 SLE patients and 435 healthy controls were genotyped for the CCR5delta32 polymorphism. We observed that, in European-derived individuals, the frequency of the CCR5delta32 allele was smaller in patients than in controls (2.7% vs. 7.5%, OR 0.34, 95% CI 0.17-0.65, p Bonf=0.002), suggesting that this allele could be considered a protective factor for the disease. Regarding clinical manifestations, we observed that CCR5delta32 female African-derived carrier patients presented a higher predisposition to class IV nephritis when compared with absent nephritis/other class group (13.8% vs. 3.8%, OR 37.1, 95% CI 2.8-1854.7, p Bonf=0.030). A multivariate analysis including all female patients and controlling for the presence or absence of anti-dsDNA antibodies, ethnicity and age at diagnosis showed an increased relative risk of 3.9 times for patients carrying the CCR5delta32 allele to develop class IV nephritis as compared with noncarriers. Our data suggest that the CCR5delta32 allele is a protective factor for the disease in European-derived patients and a susceptibility factor to class IV nephritis in African-derived female patients.
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Affiliation(s)
- J S Schauren
- Immunogenetics Laboratory, Genetics Department, Biosciences Institute, Universidade Federal do Rio Grande do Sul, Brazil
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Pazzola G, Boiardi L, Casali B, Farnetti E, Nicoli D, Pipitone N, Padovano I, Caruso A, Catanoso M, Salvarani C. CC chemokine receptor 5 polymorphism in Italian patients with giant cell arteritis. Mod Rheumatol 2012; 23:851-5. [PMID: 23001713 DOI: 10.1007/s10165-012-0751-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Accepted: 08/17/2012] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To evaluate the potential role of CC chemokine receptor 5 (CCR5)Δ32 polymorphism in the susceptibility to giant cell arteritis (GCA) in a cohort of Italian patients. METHODS 176 consecutive Italian patients with biopsy-proven GCA and 180 healthy age- and sex-matched blood donors were molecularly genotyped for the CCR5Δ32 polymorphism. RESULTS No statistically significant difference in the Δ32CCR5 allele frequency between GCA patients (5.1 %) and controls (2.8 %) was observed (p = 0.109). Carriers of the CCR5Δ32 allele (Δ32/Δ32 + CCR5/Δ32) were similarly represented in the two groups. CONCLUSIONS Our results do not support a role for the CCR5Δ32 polymorphism in determining susceptibility to GCA.
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Affiliation(s)
- Giulia Pazzola
- Rheumatology Unit, Department of Internal Medicine, Azienda Ospedaliera Arcispedale S Maria Nuova, Istituto di Ricovero e Cura a Carattere Scientifico, Viale Risorgimento n 80, 42100, Reggio Emilia, Italy
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Role of the CCR5/Δ32CCR5 polymorphism in biopsy-proven giant cell arteritis. Hum Immunol 2011; 72:458-61. [DOI: 10.1016/j.humimm.2011.02.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 01/28/2011] [Accepted: 02/22/2011] [Indexed: 01/07/2023]
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Functional CCR5 receptor protects patients with arthritis from high synovial burden of infecting Chlamydia trachomatis. Am J Med Sci 2011; 340:448-51. [PMID: 20811274 DOI: 10.1097/maj.0b013e3181ee6a62] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
INTRODUCTION The CCR5 chemokine receptor occurs in a wild-type (wt) and a nonfunctional deleted form (Δ32). Reports suggested that Chlamydia-induced reproductive tract pathology is attenuated in women bearing Δ32. The authors asked whether the mutation affects synovial prevalence and burden of Chlamydia trachomatis. METHODS Polymerase chain reaction (PCR) defined CCR5 genotype in synovial tissue DNA from 218 individuals: 21 controls, 110 with reactive arthritis (ReA), 83 with undifferentiated oligoarthritis (UO), 4 with osteoarthritis (OA). Disease durations were 0.5 to 21 years. Additional PCR assays defined the presence of C trachomatis DNA. Bacterial load was assessed by real-time PCR in selected samples. RESULTS Five controls were wt/Δ32, 16 were wt/wt; 2 of 21 controls (both wt/wt) were PCR positive for C trachomatis. Eighty-five (44%) patients with arthritis were PCR positive for C trachomatis (69 ReA and 16 UO). For patients with ReA, 14 (13%) had wt/Δ32, 10 (71%) of whom were PCR positive. Nineteen patients with UO (23%) were wt/Δ32, with 1 (1%) PCR positive. No differences existed for gender or other factors. One patient with OA had wt/Δ32. In ReA and UO samples, wt/Δ32 heterozygotes had a 5- to 10-fold higher bacterial burden than did wt/wt patients (P = 0.03), regardless of diagnosis. CONCLUSION These results indicate that the wt/wt genotype is associated with attenuated synovial bacterial load compared with loads in wt/Δ32 patients. Although no alleles other than Δ32 were assessed, our data suggest that this allele provides little/no protection from ReA in patients infected with Chlamydia- but it may provide some protection in patients with UO. The basis of this possible differential effect of CCR5 genotype is under study.
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Arababadi MK, Pourfathollah AA, Jafarzadeh A, Hassanshahi G, Mohit M, Hajghani M, Ahmadabadi BN, Kennedy D. Evaluation of CCR5 Expression on NK Cells in Iranian Patients With Occult Hepatitis B Infection. Lab Med 2010. [DOI: 10.1309/lmauisl84q4srsbt] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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