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Tsujimoto S, Ozaki Y, Ito T, Nomura S. Usefulness of Cytokine Gene Polymorphisms for the Therapeutic Choice in Japanese Patients with Rheumatoid Arthritis. Int J Gen Med 2021; 14:131-139. [PMID: 33469350 PMCID: PMC7813643 DOI: 10.2147/ijgm.s287505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 12/30/2020] [Indexed: 12/12/2022] Open
Abstract
Background Rheumatoid arthritis (RA) is characterized by systemic synovitis with bone erosion and joint cartilage degradation. Although the analysis of polymorphisms in cytokine-encoding genes is important or understanding the pathophysiology of RA and selecting appropriate treatment for it, few studies have examined such single-nucleotide polymorphisms (SNPs) specifically in Japanese patients. This study was established to investigate the associations between polymorphisms in cytokine-encoding genes, autoantibodies and therapeutic responses in Japanese RA patients. Methods The subjects in this study consisted of 100 RA patients and 50 healthy controls. We extracted data on sex, age, disease duration, rheumatoid factor (RF), anti-cyclic citrullinated peptide (anti-CCP) antibody, and therapeutic responses, including to methotrexate (MTX) and biological disease-modifying antirheumatic drugs (DMARDs). Genomic DNA was isolated from peripheral blood, which was genotyped for IL-10, TNF-α, TGF-β1, and IFN-γ polymorphisms. Results Regarding IL-10 (−592 C/A and −819 C/T), significant decreases in the frequencies of the IL-10 (−592) CC genotype and (−819) CC genotype were found in RA patients compared with the levels in controls. For IFN-γ (+874 T/A), a significant decrease in the frequency of the TT genotype was found in RA patients compared with that in controls. Regarding TGF-β1 (+869 T/C), patients with positivity for anti-CCP antibody had a significantly lower frequency of the CC genotype than those with negativity for it. Furthermore, the IL-10 (−592) CC genotype and (−819) CC genotype might be related to the biological DMARD-response. Conclusion Our results suggest that the analysis of polymorphisms in cytokine-encoding genes may be useful when selecting treatment for Japanese RA patients.
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Affiliation(s)
- Saki Tsujimoto
- First Department of Internal Medicine, Kansai Medical University, Hirakata, Osaka, Japan
| | - Yoshio Ozaki
- First Department of Internal Medicine, Kansai Medical University, Hirakata, Osaka, Japan
| | - Tomoki Ito
- First Department of Internal Medicine, Kansai Medical University, Hirakata, Osaka, Japan
| | - Shosaku Nomura
- First Department of Internal Medicine, Kansai Medical University, Hirakata, Osaka, Japan
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Woo YR, Kim HS, Lee SH, Ju HJ, Bae JM, Cho SH, Lee JD. Systemic Comorbidities in Korean Patients with Rosacea: Results from a Multi-Institutional Case-Control Study. J Clin Med 2020; 9:jcm9103336. [PMID: 33080929 PMCID: PMC7603220 DOI: 10.3390/jcm9103336] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 10/15/2020] [Accepted: 10/16/2020] [Indexed: 12/27/2022] Open
Abstract
Recent evidence links rosacea to systemic disease, but there are not enough methodologic studies addressing this association in Asians. Our aim was to identify rosacea comorbidities in Koreans and establish a reference database. A multi-center, case-control study was performed where a total of 12,936 rosacea patients and 12,936 age- and sex-matched control subjects were identified from 2007 to 2018. Logistic regression was performed to find significant association between rosacea and Sjögren syndrome (odds ratio [OR] 2.05; 95% confidence interval, 1.40–3.00), systemic sclerosis (OR 6.56; 95% CI, 1.50–28.7), rheumatoid arthritis (OR 1.72; 95% CI, 1.50–1.98), ankylosing spondylitis (OR 2.32; 95% CI, 1.42–3.84), autoimmune thyroiditis (OR 1.96; 95% CI, 1.40–2.73), alopecia areata (OR 1.77; 95% CI, 1.27–2.45), vitiligo (OR 1.90; 95% CI, 1.30–2.77), lung cancer (OR 1.54; 95% CI, 1.06–2.21), hepatobiliary cancer (OR 1.38; 95% CI, 1.06–1.77), alcohol abuse (OR 1.59; 95% CI, 1.05–2.39), diabetes mellitus (OR 1.11; 95% 1.02–1.19), obesity (OR 1.72; 95% CI, 1.22–2.41), allergic rhinitis (OR 1.65; 95% CI, 1.54–1.76), allergic conjunctivitis (OR 1.57; 95% CI, 1.27–1.94), chronic rhinosinusitis (OR 1.28; 95% CI, 1.14–1.42), herpes infection (OR 1.69; 95% CI, 1.53–1.86), and human papillomavirus infection (OR 2.50; 95% CI, 2.06–3.02). Higher odds for Sjogren syndrome, systemic sclerosis, ankylosing spondylitis, thyroiditis, vitiligo, hepatobiliary cancer, and obesity was exclusive in female subjects with rosacea, whereas increased prevalence of alopecia areata and alcohol abuse was confined to men. Only those who were 50 years and older exhibited higher odds for vitiligo, lung cancer, and gastroesophageal reflux disease while individuals younger than 50 were exclusively associated with hepatobiliary cancer, allergic conjunctivitis, and irritable bowel syndrome. Our study suggests that Koreans with rosacea are more likely to experience systemic comorbidity. Clinicians should acknowledge these interrelations and employ comprehensive care with an individual-based approach.
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Affiliation(s)
- Yu Ri Woo
- Department of Dermatology, Incheon St. Mary’s Hospital, The Catholic University of Korea, Seoul 06591, Korea; (Y.R.W.); (H.S.K.); (S.H.L.); (S.H.C.)
| | - Hei Sung Kim
- Department of Dermatology, Incheon St. Mary’s Hospital, The Catholic University of Korea, Seoul 06591, Korea; (Y.R.W.); (H.S.K.); (S.H.L.); (S.H.C.)
- Dr. Philip Frost Department of Dermatology and Cutaneous Surgery, Miami Itch Center, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Se Hoon Lee
- Department of Dermatology, Incheon St. Mary’s Hospital, The Catholic University of Korea, Seoul 06591, Korea; (Y.R.W.); (H.S.K.); (S.H.L.); (S.H.C.)
| | - Hyun Jeong Ju
- Department of Dermatology, St. Vincent’s Hospital, The Catholic University of Korea, Seoul 06591, Korea; (H.J.J.); (J.M.B.)
| | - Jung Min Bae
- Department of Dermatology, St. Vincent’s Hospital, The Catholic University of Korea, Seoul 06591, Korea; (H.J.J.); (J.M.B.)
- Heal House Skin Clinic, Mesanro 24, Paldal-gu, Suwon 16461, Korea
| | - Sang Hyun Cho
- Department of Dermatology, Incheon St. Mary’s Hospital, The Catholic University of Korea, Seoul 06591, Korea; (Y.R.W.); (H.S.K.); (S.H.L.); (S.H.C.)
| | - Jeong Deuk Lee
- Department of Dermatology, Incheon St. Mary’s Hospital, The Catholic University of Korea, Seoul 06591, Korea; (Y.R.W.); (H.S.K.); (S.H.L.); (S.H.C.)
- Correspondence: ; Tel.: +82-32-280-5100
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Human leukocyte antigen-G 3' untranslated region polymorphism +3142G/C (rs1063320) and haplotypes are associated with manifestations of the American Tegumentary Leishmaniasis in a Northeastern Brazilian population. Hum Immunol 2019; 80:908-916. [PMID: 31420207 DOI: 10.1016/j.humimm.2019.08.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 07/25/2019] [Accepted: 08/05/2019] [Indexed: 11/21/2022]
Abstract
While the role of cytokine genes has been well documented in the context of Leishmania (Viannia) braziliensis infection, no studies have addressed the influence of human leukocyte antigen-G (HLA-G) in susceptibility/resistance to American Tegumentary Leishmaniasis (ATL). Here, we evaluated the influences of HLA-G, IL-10, TNF-A and IFN-G in the susceptibility and clinical manifestations of ATL. DNA of 114 ATL patients and 346 healthy individuals were sequenced for well-documented polymorphisms in HLA-G 3' untranslated region (UTR), in IL-10 and TNF-A promoters and in IFN-G intron 1. Soluble HLA-G (sHLA-G) and cytokine levels were evaluated by ELISA and flow cytometry, respectively. Analyses were performed using GraphPad and R-package software. Individuals bearing HLA-G +3142G/G showed an association with increased risk for ATL, whereas those carrying the HLA-G +3142C/G and one copy of UTR6 haplotype, showed an association with decreased risk for ATL. sHLA-G was overexpressed in "susceptible" patients compared to the "resistant'' one, and also in patients bearing +3142G/G genotype. From these results, HLA-G +3142G/G may be considered as genotype of susceptibility and UTR6 as marker of protection to ATL. Our findings showed a participation of HLA-G in the pathogenesis of the ATL.
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Are There Any Common Genetic Risk Markers for Rheumatoid Arthritis and Periodontal Diseases? A Case-Control Study. Mediators Inflamm 2019; 2019:2907062. [PMID: 30890897 PMCID: PMC6390239 DOI: 10.1155/2019/2907062] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 01/14/2019] [Accepted: 01/29/2019] [Indexed: 12/15/2022] Open
Abstract
Background Several studies suggest that there is a biologically plausible connection between rheumatoid arthritis (RA) and periodontal diseases (PD). Both disorders are characterized as multifactorial diseases potentially sharing common risk factors. Based on the inflammatory nature of RA and PD, the impact of genetic variations of genes of the immune system on both diseases was studied in this study. Materials and Methods We conducted a case-control study (n = 201) comparing 101 RA patients suffering from periodontal disease of different severities (no/mild PD vs. severe PD) with 100 systemically healthy controls without RA and severe PD. The genotype, allele, and haplotype distributions of 22 SNPs of 13 pro- and anti-inflammatory cytokines were assessed applying sequence-specific PCR. Results Evaluating the impact of cytokine SNPs in RA, we identified the G allele of rs1801275 in IL4Rα (p = 0.043) and the G allele of rs361525 in TNFα (p = 0.005) as disease-associated risk factors in bivariate analyses. In multivariate analyses, these significant associations could not be proven. The A allele of rs2430561 in IFNγ was indicative for severe periodontitis among the patients with rheumatoid arthritis (p = 0.039). Investigating the impact of rs2430561 in IFNγ on comorbidity using binary logistic regression analyses, the A allele was confirmed as an independent risk factor for severe periodontal disease and RA (p = 0.024). Conclusions These results emphasize the association of genetic variations in proinflammatory cytokines (TNFα and IFNγ) and cytokine receptor (IL4Rα) and RA and periodontal diseases. In multivariate analyses, the A allele of IFNγ was proven to be a significant marker of RA and PD comorbidities. The study broadens the knowledge about disease-specific differences in genetic composition and provides an improved understanding of a possible association of both diseases.
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Mahmoud AA, Sheneef A, Goda AM, Ismail MA, Abualfadl EM. Association of interferon-γ and its (+874 T/A) gene polymorphism with type 2 diabetes mellitus in rheumatoid arthritis patients. THE EGYPTIAN RHEUMATOLOGIST 2016. [DOI: 10.1016/j.ejr.2015.09.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Association of Interleukin-2, but not Interferon-Gamma, single nucleotide polymorphisms with juvenile idiopathic arthritis. Allergol Immunopathol (Madr) 2016; 44:303-6. [PMID: 27040810 DOI: 10.1016/j.aller.2015.10.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Revised: 09/08/2015] [Accepted: 10/07/2015] [Indexed: 11/22/2022]
Abstract
BACKGROUND Cytokines, including interleukin-2 (IL-2) and interferon-gamma (IFN-γ), seem to play a role in the pathogenesis of juvenile idiopathic arthritis (JIA). The aim of this study was to investigate the associations of IL-2 and IFN-γ single nucleotide polymorphisms (SNPs) with susceptibility to JIA in an Iranian population. METHODS Genomic DNA of 54 Iranian patients with JIA and 139 healthy unrelated controls were typed for IL-2 (G/T at -330 and +166) as well as IFN-γ gene (A/T at +874), using polymerase chain reaction with sequence-specific primers method, and compared between patients and controls. RESULTS A significantly higher frequency of the IL-2 -330 GG genotype (p<0.01) was found in the JIA patients compared to the controls. However, the GT genotype at the same position was notably lower than in controls (p<0.01). Moreover, IL-2 (-330, +166) GT haplotype was more frequent in patients with JIA in comparison with controls. No significant differences was observed between the two groups of case and control for IL-2 (G/T at +166) and IFN-γ (A/T at +874) SNPs. CONCLUSION The results of the current study suggest that certain SNPs of IL-2 gene have association with individuals' susceptibility to JIA. However, further investigations are required to confirm the results of this study.
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Traks T, Karelson M, Reimann E, Rätsep R, Silm H, Vasar E, Kõks S, Kingo K. Association analysis of class II cytokine and receptor genes in vitiligo patients. Hum Immunol 2016; 77:375-81. [PMID: 26429320 DOI: 10.1016/j.humimm.2015.09.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 04/07/2014] [Accepted: 09/28/2015] [Indexed: 01/21/2023]
Abstract
The loss of melanocytes in vitiligo is mainly attributed to defective autoimmune mechanisms and lately autoinflammatory mediators have become more emphasized. Among these, a number of class II cytokines and their receptors have displayed altered expression patterns in vitiligo. Thus, we selected 30 SNPs from the regions of respective genes to be genotyped in Estonian case-control sample (109 and 328 individuals, respectively). For more precise analyses, patients were divided into subgroups based on vitiligo progression activity, age of onset, sex, occurrence of vitiligo among relatives, extent of depigmented areas, appearance of Köbner's phenomenon, existence of halo nevi, occurrence of spontaneous repigmentation, and amount of thyroid peroxidase antibodies. No associations appeared in whole vitiligo group. In subgroups, several allelic and haplotype associations were found. The strongest involved SNPs rs12301088 (near IL26 gene), that was associated with familial vitiligo and existence of halo nevi, and rs2257167 (IFNAR1 gene), that was associated with female vitiligo. Additionally, haplotypes consisting of rs12301088 and rs12321603 alleles (IL26-IL22 genes), that were associated with familial vitiligo and existence of halo nevi. In conclusion, several genetic associations with vitiligo subphenotypes were revealed and functional explanations to these remain to be determined in respective studies.
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Affiliation(s)
- Tanel Traks
- Department of Dermatology, University of Tartu, Raja 31, 50417 Tartu, Estonia; Centre of Excellence for Translational Medicine, University of Tartu, Ravila 19, 50411 Tartu, Estonia.
| | - Maire Karelson
- Department of Dermatology, University of Tartu, Raja 31, 50417 Tartu, Estonia; Clinic of Dermatology, Tartu University Hospital, Raja 31, 50417 Tartu, Estonia
| | - Ene Reimann
- Department of Pathophysiology, University of Tartu, Ravila 19, 50411 Tartu, Estonia; Department of Reproductive Biology, Estonian University of Life Sciences, Kreutzwaldi 62, 51014 Tartu, Estonia
| | - Ranno Rätsep
- Department of Physiology, University of Tartu, Ravila 19, 50411 Tartu, Estonia
| | - Helgi Silm
- Department of Dermatology, University of Tartu, Raja 31, 50417 Tartu, Estonia; Clinic of Dermatology, Tartu University Hospital, Raja 31, 50417 Tartu, Estonia
| | - Eero Vasar
- Centre of Excellence for Translational Medicine, University of Tartu, Ravila 19, 50411 Tartu, Estonia; Department of Physiology, University of Tartu, Ravila 19, 50411 Tartu, Estonia
| | - Sulev Kõks
- Centre of Excellence for Translational Medicine, University of Tartu, Ravila 19, 50411 Tartu, Estonia; Department of Pathophysiology, University of Tartu, Ravila 19, 50411 Tartu, Estonia; Department of Reproductive Biology, Estonian University of Life Sciences, Kreutzwaldi 62, 51014 Tartu, Estonia
| | - Külli Kingo
- Department of Dermatology, University of Tartu, Raja 31, 50417 Tartu, Estonia; Clinic of Dermatology, Tartu University Hospital, Raja 31, 50417 Tartu, Estonia
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Chen RN, Su YQ, Wang J, Liu M, Qiao Y, Mao Y, Ke QZ, Han KH, Zheng WQ, Zhang JS, Wu CW. Molecular characterization and expression analysis of interferon-gamma in the large yellow croaker Larimichthys crocea. FISH & SHELLFISH IMMUNOLOGY 2015; 46:596-602. [PMID: 26193669 DOI: 10.1016/j.fsi.2015.07.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 07/16/2015] [Accepted: 07/16/2015] [Indexed: 06/04/2023]
Abstract
The large yellow croaker Larimichthys crocea is an important mariculture fish species in China, and the bacterium Vibrio harveyi (V. harveyi) and the ciliate protozoan Cryptocaryon irritans (C. irritans) are the two major pathogens in its aquaculture sector. Interferon-gamma (IFN-γ) plays important roles in regulating both innate and cell mediated immune responses as an inflammatory cytokine. In this study, we obtained the nucleotide sequence of IFN-γ from the large yellow croaker (LcIFN-γ). The phylogenetic relationship tree of 18 available IFN-γ genes was constructed based on their sequences. Expression analyses in 10 various tissues were conducted after the croaker challenged with V. harveyi and C. irritans, respectively. Real time PCR analysis showed that the expression of LcIFN-γ was observed broadly in health individuals. After injected with V. harveyi, the 10 tissues had a higher expression of IFN-γ at the first day (1 d); only spleen, muscle, intestine, heart and skin had higher expressions after infected with C. irritans at 1 d. Major immune tissues (skin, gill, head kidney and spleen) and detoxification tissue (liver) were sampled at 0 h, 6 h, 1 d, 2 d, 3 d, 4 d, 5 d and 7 d to understand the expression trends of LcIFN-γ after challenged with C. irritans. The expressions of LcIFN-γ in skin and gill (the primary immune organs) showed a clear correlative relationship with the life cycle of C. irritans.
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Affiliation(s)
- Ruan-Ni Chen
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005, China
| | - Yong-Quan Su
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005, China
| | - Jun Wang
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005, China
| | - Min Liu
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005, China
| | - Ying Qiao
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005, China
| | - Yong Mao
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361005, China.
| | - Qiao-Zhen Ke
- Ningde Fufa Fisheries Co., LTD, Ningde, 352002, China
| | - Kun-Huang Han
- Ningde Fufa Fisheries Co., LTD, Ningde, 352002, China
| | | | | | - Chang-Wen Wu
- Zhejiang Ocean University, Zhoushan, 316022, China
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Abstract
Prior to the 1990s, genetic analyses indicated that many autoimmune diseases are driven by T cell responses; however, the identity of the pathogenic T cell populations responsible for dysfunctional autoimmune responses remained unclear. Some 20 years ago, the discovery of numerous chemokines and their receptors along with the development of specific mAbs to these provided a distinct advance. These new tools revealed a remarkable dichotomy and disclosed that some chemokine receptors guided the constitutive migration of T cells through lymphoid tissues, whereas others, such as CCR5 and CXCR3, guided effector and memory T cell migration to inflammatory lesions. These T cell markers enabled a new understanding of immune responses and the types of T cells involved in different inflammatory reactions.
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Ferreira LRP, Frade AF, Baron MA, Navarro IC, Kalil J, Chevillard C, Cunha-Neto E. Interferon-γ and other inflammatory mediators in cardiomyocyte signaling during Chagas disease cardiomyopathy. World J Cardiol 2014; 6:782-790. [PMID: 25228957 PMCID: PMC4163707 DOI: 10.4330/wjc.v6.i8.782] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Revised: 03/29/2014] [Accepted: 06/03/2014] [Indexed: 02/06/2023] Open
Abstract
Chagas disease cardiomyopathy (CCC), the main consequence of Trypanosoma cruzi (T.cruzi) infection, is an inflammatory cardiomyopathy that develops in up to 30% of infected individuals. The heart inflammation in CCC patients is characterized by a Th1 T cell-rich myocarditis with increased production of interferon (IFN)-γ, produced by the CCC myocardial infiltrate and detected at high levels in the periphery. IFN-γ has a central role in the cardiomyocyte signaling during both acute and chronic phases of T.cruzi infection. In this review, we have chosen to focus in its pleiotropic mode of action during CCC, which may ultimately be the strongest driver towards pathological remodeling and heart failure. We describe here the antiparasitic protective and pathogenic dual role of IFN-γ in Chagas disease.
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Dwivedi M, Laddha NC, Shah K, Shah BJ, Begum R. Involvement of interferon-gamma genetic variants and intercellular adhesion molecule-1 in onset and progression of generalized vitiligo. J Interferon Cytokine Res 2013; 33:646-59. [PMID: 23777204 PMCID: PMC3814581 DOI: 10.1089/jir.2012.0171] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Interferon-gamma (IFN-γ) is a paracrine inhibitor of melanocytes and genetic variability due to intron 1 polymorphisms in IFNG has been reported to be associated with increased risk for several autoimmune diseases. The aim of present study was to determine whether intron 1 +874A/T (rs2430561) and CA microsatellite (rs3138557) polymorphisms in IFNG are associated with generalized vitiligo (GV) susceptibility and expression of IFNG and intercellular adhesion molecule-1 (ICAM1) affects the disease onset and progression. Here we report that IFNG CA microsatellite but not +874A/T may be a genetic risk factor for GV; however, +874T allele plays a crucial role in increased expression of IFNG mRNA and protein levels which could affect the onset and progression of the disease. Active GV patients showed increased IFNG levels compared to stable GV patients. The genotype-phenotype analysis revealed that IFNG expression levels were higher in patients with +874 TT genotypes and 12 CA repeats. Patients with the early age of onset showed higher IFNG expression and female GV patients showed higher IFNG and ICAM1 expression implicating gender biasness and involvement of IFN-γ in early onset of the disease. Moreover, the increased IFN-γ levels in patients lead to increased ICAM1 expression, which could be a probable link between cytokines and T-cell involvement in pathogenesis of GV.
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Affiliation(s)
- Mitesh Dwivedi
- Department of Biochemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, India
| | - Naresh C. Laddha
- Department of Biochemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, India
| | - Kriti Shah
- Department of Biochemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, India
| | - Bela J. Shah
- Department of Dermatology, STD and Leprosy, B.J. Medical College and Civil Hospital, Ahmedabad, India
| | - Rasheedunnisa Begum
- Department of Biochemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, India
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Requena T, Gazquez I, Moreno A, Batuecas A, Aran I, Soto-Varela A, Santos-Perez S, Perez N, Perez-Garrigues H, Lopez-Nevot A, Martin E, Sanz R, Perez P, Trinidad G, Alarcon-Riquelme ME, Teggi R, Zagato L, Lopez-Nevot MA, Lopez-Escamez JA. Allelic variants in TLR10 gene may influence bilateral affectation and clinical course of Meniere's disease. Immunogenetics 2013; 65:345-55. [PMID: 23370977 DOI: 10.1007/s00251-013-0683-z] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 01/18/2013] [Indexed: 12/31/2022]
Abstract
Toll-like receptors trigger the innate immune response by activating various cell types such us macrophages and lymphocytes. We genotyped SNV of TLR3, TRL7, TLR8 and TLR10 in 863 Spanish and 150 Italian patients with Meniere's disease (MD) and 1,013 controls by using Taqman assays. Real-Time qPCR was used to measure the expression level of TLR10 in peripheral blood leukocytes. The overall dataset showed that the C allele and the CC genotype of rs11096955 in TLR10 gene were more commonly observed in controls than patients (corrected p = 1 × 10(-3), OR = 0.68 [95 % confidence interval, 0.54-0.84] for CC genotype; corrected p = 1.5 × 10(-5), OR = 0.75 [0.66-0.85] for allele C). Moreover, the CC genotype was more frequent in patients with uni- (19 %) than bilateral sensorineural hearing loss (SNHL) (13 %). Logistic regression demonstrated that the time since the onset of MD, Tumarkin crises, hearing stage and rs11096955 were independent factors influencing the risk of bilateral SNHL. In addition, rs11096955 influenced hearing loss progression in patients with bilateral MD. No change in expression of TLR10 was observed according to CC, CA or AA genotypes. Our data suggest that allelic variants of TLR10 gene may influence the susceptibility and time-course of hearing loss of MD in the European population.
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Affiliation(s)
- Teresa Requena
- Human DNA Variability Department, Centro de Genómica e Investigación Oncológica, Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain
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Gázquez I, Moreno A, Requena T, Ohmen J, Santos-Perez S, Aran I, Soto-Varela A, Pérez-Garrigues H, López-Nevot A, Batuecas A, Friedman RA, López-Nevot MA, López-Escamez JA. Functional variants of MIF, INFG and TFNA genes are not associated with disease susceptibility or hearing loss progression in patients with Ménière's disease. Eur Arch Otorhinolaryngol 2012. [PMID: 23179933 DOI: 10.1007/s00405-012-2268-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Variability in acute immune response genes could determine susceptibility or prognosis for Ménière's disease (MD). The cytokines tumor necrosis factor α (TNFα), macrophage migration inhibitory factor (MIF) and interferon γ (INFγ) are proinflammatory cytokines of the innate immune response. These cytokines mediate inflammation and have been previously associated with the inflammatory process in several autoimmune diseases. We investigated the association between functional allelic variants of MIF (rs35688089), IFNG (rs2234688) and TNFA (rs1800629) in patients with MD. In addition to testing these variants for an association with disease, we also tested for an association with clinical aspects of disease progression, such as persistence of vertigo and the sensorineural hearing loss. A total of 580 patients with diagnosis of definite MD, according to the diagnostic scale of the American Academy of Otolaryngology-Head and Neck Surgery, and 552 healthy controls were included. DNA samples from a set of 291 American patients were used to confirm the results obtained in the MIF gene in our Spanish cohort. Although we found a significant association with the allele containing five repeats of CATT within the MIF gene in patients with MD in the Spanish cohort [corrected p = 0.008, OR = 0.69 (95 % CI, 0.54-0.88)], this finding could not be replicated in the American set. Moreover, no genetic associations for variants in either the TNFA or IFNG genes and MD were found. These results support the conclusion that functional variants of MIF, INFG, and TFNA genes are not associated with disease susceptibility or hearing loss progression in patients with MD.
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Affiliation(s)
- Irene Gázquez
- Otology and Neurotology Group CTS495, Centro de Genómica e Investigación Oncológica Pfizer-Universidad de Granada-Junta de Andalucía (GENyO), Avda. de la Ilustración, 114, 18014 Granada, Spain
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García-Bermúdez M, López-Mejías R, González-Juanatey C, Corrales A, Robledo G, Castañeda S, Miranda-Filloy JA, Blanco R, Fernández-Gutiérrez B, Balsa A, González-Alvaro I, Gómez-Vaquero C, Llorca J, Martín J, González-Gay MA. Analysis of the interferon gamma (rs2430561, +874T/A) functional gene variant in relation to the presence of cardiovascular events in rheumatoid arthritis. PLoS One 2012; 7:e47166. [PMID: 23077565 PMCID: PMC3471910 DOI: 10.1371/journal.pone.0047166] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 09/10/2012] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE Rheumatoid arthritis (RA) is a chronic inflammatory disease associated with increased cardiovascular (CV) morbidity and mortality. Since interferon-gamma (IFN-γ) has a direct effect on inflammation, in this study we assessed the potential association of the IFNG functional gene variant rs2430561 with CV disease in patients with RA. METHODS One thousand six hundred and thirty-five patients fulfilling the 1987 American College of Rheumatology classification criteria for RA were genotyped for the IFNG (rs2430561, +874T/A) gene polymorphism using TaqMan genotyping assay. Patients were stratified according to the presence of CV events or not. Logistic regression models to explain the presence of CV disease according to the IFNG rs2430561 allele distribution were performed. The potential influence of this variant in the development of subclinical atherosclerosis was also analyzed in a subgroup of patients with no history of CV events to determine carotid artery intima-media thickness (IMT) (n = 286) and presence of carotid plaques. Levels of the cytokine were determined in a subgroup of patients by ELISA. RESULTS Adjusted logistic regression model disclosed that presence of the minor allele A was not associated with increased risk of suffering CV events in RA patients. Besides, differences did not achieve statistical significance regarding carotid IMT and presence of carotid plaques in RA patients carrying IFNG rs2430561 variant allele. Levels of IFN-γ were higher in patients who had suffered CV events compared to patients who did not. CONCLUSION Our results do not support a role of IFNG rs2430561 (+874T/A) functional gene variant in the development of CV disease in RA patients.
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Affiliation(s)
- Mercedes García-Bermúdez
- Instituto de Parasitología y Biomedicina López-Neyra, Consejo Superior de Investigaciones Científicas, IPBLN-C.S.I.C., Granada, Spain
| | - Raquel López-Mejías
- Department of Rheumatology, Hospital Universitario Marqués de Valdecilla, IFIMAV, Santander, Spain
| | | | - Alfonso Corrales
- Department of Rheumatology, Hospital Universitario Marqués de Valdecilla, IFIMAV, Santander, Spain
| | - Gema Robledo
- Instituto de Parasitología y Biomedicina López-Neyra, Consejo Superior de Investigaciones Científicas, IPBLN-C.S.I.C., Granada, Spain
| | - Santos Castañeda
- Department of Rheumatology, Hospital Universitario La Princesa, IIS-Princesa, Madrid, Spain
| | | | - Ricardo Blanco
- Department of Rheumatology, Hospital Universitario Marqués de Valdecilla, IFIMAV, Santander, Spain
| | | | - Alejandro Balsa
- Department of Rheumatology, Hospital Universitario La Paz, Madrid, Spain
| | | | - Carmen Gómez-Vaquero
- Department of Rheumatology, Hospital Universitario de Bellvitge, IDIBELL, ĹHospitalet del Llobregat, Barcelona, Spain
| | - Javier Llorca
- Department of Epidemiology and Computational Biology, School of Medicine, University of Cantabria, and CIBER Epidemiología y Salud Pública (CIBERESP), IFIMAV, Santander, Spain
| | - Javier Martín
- Instituto de Parasitología y Biomedicina López-Neyra, Consejo Superior de Investigaciones Científicas, IPBLN-C.S.I.C., Granada, Spain
| | - Miguel A. González-Gay
- Department of Rheumatology, Hospital Universitario Marqués de Valdecilla, IFIMAV, Santander, Spain
- * E-mail:
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Kim KT, Kim DH, Chung JY, Lee S, Joo J, Nah SS, Song HY, Kim HJ. Association ofInterferon GammaPolymorphism with Ossification of the Posterior Longitudinal Ligament in the Korean Population. Immunol Invest 2012; 41:876-87. [DOI: 10.3109/08820139.2012.714437] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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16
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Galimova E, Akhmetova V, Latipov B, Kingo K, Rätsep R, Traks T, Kõks S, Khusnutdinova E. Analysis of genetic variants of class II cytokine and their receptor genes in psoriasis patients of two ethnic groups from the Volga-Ural region of Russia. J Dermatol Sci 2012; 68:9-18. [PMID: 22840887 DOI: 10.1016/j.jdermsci.2012.07.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 06/20/2012] [Accepted: 07/06/2012] [Indexed: 12/20/2022]
Abstract
BACKGROUND The molecular basis of pathogenesis of psoriasis remains unclear, but one unifying hypothesis of disease aetiology is the cytokine network model. The class II cytokines (CF2) and their receptors (CRF2) are all involved in the inflammatory processes and single nucleotide polymorphisms (SNPs) in respective genes have been associated with psoriasis in a previous study of the Estonian population. OBJECTIVE We performed a replication study of 47 SNPs in CF2 and CRF2 genes in independent cohorts of psoriasis patients of two ethnic groups (Russians and Bashkirs) from the Volga-Ural region of Russia. METHODS DNA was obtained from 395 psoriasis patients of two ethnic groups from the Volga-Ural region of Russia and 476 ethnically matched controls. 47 SNPs in the loci of the genes encoding Class II cytokines and their receptors were selected by SNPbrowser version 3.5. Genotyping was performed using the SNPlex™ (Applied Biosystems) platform. RESULTS The genetic variant rs30461 previously associated in original case-control study in Estonians, was also associated in Russians (corrected P-value (Pc=0.008, OR=0.44), but did not reach statistical significance in the Bashkir population. Additionally, the haplotype analysis provided that CC haplotype formed by the SNPs rs30461 and rs955155 had a protective effect in Russians (Pc=0.0024, OR=0.44), supporting the involvement of this locus in the protection against psoriasis. Combined meta-analysis of three populations, including 943 psoriasis patients and 812 healthy controls, showed that the IL29 rs30461 C-allele was not associated with decreased risk of psoriasis (P=0.165, OR=0.68). Moreover, stratification of studies by ethnicity revealed a significant association in the European cohort (P=9.506E-006, OR=0.53). CONCLUSION Therefore, there is no overall evidence of association between psoriasis and SNP rs30461 of the IL29 gene, but there is some evidence to suggest that an association exists in Europeans. However, this current concept should be considered as preliminary and the results need to be confirmed in future independent studies.
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Affiliation(s)
- Elvira Galimova
- Institute of Biochemistry and Genetics, Ufa Scientific Center of Russian Academy of Sciences, Ufa, Russia.
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de Paz B, Prado C, Alperi-López M, Ballina-García FJ, Rodriguez-Carrio J, López P, Suárez A. Effects of glucocorticoid treatment on CD25⁻FOXP3⁺ population and cytokine-producing cells in rheumatoid arthritis. Rheumatology (Oxford) 2012; 51:1198-207. [PMID: 22447883 DOI: 10.1093/rheumatology/kes039] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVES To investigate CD25(-)FOXP3(+) cells in RA patients and their possible relationship with disease features and response to glucocorticoids (GCs). METHODS Peripheral blood mononuclear cells were collected from 147 RA patients, 29 healthy controls and 75 SLE patients as disease controls. The proportion of CD4(+)FOXP3(+) cells with negative, low or high CD25 expression and the levels of IL-10-, TNF-α-, IL-17- and IFNγ-producing cells were assessed by flow cytometry. The presence of the high IL-10 genotype (-1082GG), associated with good response to GC, was determined by PCR amplification and hybridization with allele-specific fluorescently labelled probes. Data were related to treatment and clinical parameters. RESULTS The CD25(-)FOXP3(+) population was significantly increased in RA patients and negatively correlated with DAS-28 and other disease parameters. The IL-10 genotype did not influence the frequency of these cells in controls or the entire RA group; however, GC-treated patient carriers of the high IL-10 genotype presented significantly higher levels of this population in addition to an increased percentage of IL-10-secreting cells and relatively low amounts of TNF-α-, IFN-γ- and IL-17-positive cells. Finally, a prospective study confirmed that genetically high IL-10 producers significantly increase CD25(-)FOXP3(+) cells after 6 months of GC treatment. CONCLUSION The present study provides the first evidence of increased CD25(-)FOXP3(+) cells in RA patients, which were associated with disease activity and with GC treatment in carriers of the high IL-10 genotype, suggesting that this population plays a role in the clinical response to prednisone in RA.
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Affiliation(s)
- Banesa de Paz
- Facultad de Medicina, Departamento de Biología Funcional, Area de Inmunología, University of Oviedo, Julián Clavería s/n, 33006 Oviedo, Spain
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18
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Genetic variants of the MRC1 gene and the IFNG gene are associated with leprosy in Han Chinese from Southwest China. Hum Genet 2012; 131:1251-60. [PMID: 22392581 DOI: 10.1007/s00439-012-1153-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Accepted: 02/19/2012] [Indexed: 12/27/2022]
Abstract
Leprosy is an ancient infectious disease, with over 200,000 affected people (mainly in Asia and Africa) being registered annually. Genetic factors may confer susceptibility to this disease. In the present study, we genotyped 12 genetic variants of the MRC1 gene and the IFNG gene in 527 Han Chinese with leprosy and 583 healthy individuals from Yunnan, China, to discern potential association of these two genes with leprosy. In particular, we aimed to validate the recently reported association of MRC1 variant rs1926736 (p.G396S) and IFNG variant rs2430561 (+874 T>A) with leprosy, which were initially observed in Vietnamese and Brazilian populations, respectively. Our results failed to confirm the reported association between variants rs1926736 and rs2430561 and leprosy in Han Chinese. However, we found that variants rs692527 (P = 0.022) and rs34856358 (P = 0.022) of the MRC1 gene were associated with paucibacillary leprosy, and rs3138557 of the IFNG gene was significantly associated with multibacillary leprosy. The exact role of the MRC1 gene and the IFNG gene in leprosy awaits future study.
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Kim HJ, Kang SW, Chung JH, Kim SJ, Choe BK. Polymorphisms of the Interferon gamma gene and coronary artery disease in the Korean population. Mol Biol Rep 2011; 39:5425-32. [DOI: 10.1007/s11033-011-1342-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Accepted: 12/03/2011] [Indexed: 02/01/2023]
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Agrawal S, Parveen F, Faridi RM, Prakash S. Interleukin-1 gene cluster variants and recurrent pregnancy loss among North Indian women: retrospective study and meta-analysis. Reprod Biomed Online 2011; 24:342-51. [PMID: 22285242 DOI: 10.1016/j.rbmo.2011.11.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 11/26/2011] [Accepted: 11/29/2011] [Indexed: 01/23/2023]
Abstract
The aim of this study was to determine whether or not interleukin-1 alpha (IL-1a), interleukin-1 beta (IL-1b) and IL-1 receptor antagonist (IL-1RA) polymorphisms are associated with risk of unexplained recurrent pregnancy loss (RPL) among North Indian women. This retrospective case–control study examine 200 well-characterized RPL cases for IL-1 gene cluster variants, determined by restriction fragment length polymorphism-PCR. The observed allele, genotype and haplotype distributions were compared with those obtained from 300 ethnically matched negative controls. Invariant distribution of IL-1 gene cluster single-nucleotide polymorphisms was observed among RPL cases and controls. Meta-analysis of IL-1b _511, +3953 and IL-1RN 86-bp variable number tandem repeat from the reported literature and this study did not reveal any significant association with the risk of RPL. In conclusion, no significant difference between RPL and control groups was observed at the allele, genotype or haplotype levels when tested for association using the dominant, recessive and additive models of inheritance for IL-1 gene cluster variants. As far as is known, this is the first report from India pertaining to IL-1 gene cluster variants’ association with the risk of RPL from North India.
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Affiliation(s)
- S Agrawal
- Department of Medical Genetics, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Raebareli Road, Lucknow 226014, UP, India.
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Schurgers E, Billiau A, Matthys P. Collagen-induced arthritis as an animal model for rheumatoid arthritis: focus on interferon-γ. J Interferon Cytokine Res 2011; 31:917-26. [PMID: 21905879 DOI: 10.1089/jir.2011.0056] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Rheumatoid arthritis (RA), an autoimmune disease causing inflammation, destruction, and deformity of the joints, affects around 1% of the world population. It is a systemic disease as patients exhibit extra-articular manifestations as well. Collagen-induced arthritis (CIA) in DBA/1 mice is one of the many animal models used to study possible pathogenic mechanisms of RA. It involves immunizing mice with collagen type II in complete Freund's adjuvant. Here we briefly review the general characteristics of RA and CIA and present an overview of data obtained by studying CIA in several gene knockout mice. In particular, detailed analysis of CIA in interferon-gamma (IFN-γ) receptor-deficient mice has pin-pointed IFN-γ as an important cytokine in the pathogenesis and has exposed new functions of IFN-γ in immunological processes. Pilot trials with exogenous IFN-γ in RA have been indicative of a beneficial effect. That improvement of the disease symptoms by IFN-γ treatment was not spectacular may be explained by the fact that RA is a heterogeneous disease in which the severity of the autoimmune disease is strongly determined by environmental factors.
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MESH Headings
- Animals
- Arthritis, Experimental/genetics
- Arthritis, Experimental/immunology
- Arthritis, Rheumatoid/immunology
- Arthritis, Rheumatoid/metabolism
- Arthritis, Rheumatoid/prevention & control
- Disease Models, Animal
- Humans
- Interferon-gamma/immunology
- Interferon-gamma/metabolism
- Interferon-gamma/pharmacology
- Mice
- Mice, Knockout
- Models, Immunological
- Receptors, Interferon/deficiency
- Receptors, Interferon/genetics
- Receptors, Interferon/immunology
- Interferon gamma Receptor
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Affiliation(s)
- Evelien Schurgers
- Laboratory of Immunobiology, Faculty of Medicine, Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium
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Douroudis K, Sirotkina M, Kingo K, Mössner R, Kõks S. Immunohistochemical expression of the PRO2268 protein in psoriasis vulgaris skin. Hum Immunol 2011; 72:522-4. [DOI: 10.1016/j.humimm.2011.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 02/23/2011] [Accepted: 03/09/2011] [Indexed: 11/25/2022]
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Sugiura T, Kawaguchi Y, Ikari K, Ichida H, Kawamoto M, Momohara S, Hara M, Yamanaka H. Interleukin-18 promoter polymorphisms in Japanese patients with rheumatoid arthritis: protective effect of the T allele and T/T genotype at rs360722. Mod Rheumatol 2011; 21:359-64. [PMID: 21225442 DOI: 10.1007/s10165-010-0399-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Accepted: 11/29/2010] [Indexed: 01/06/2023]
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory disease with a strong genetic contribution to its pathogenesis. Among numerous candidate genes, cytokine gene polymorphisms have been implicated. Interleukin-18 (IL-18) induces production of tumor necrosis factor-α and promotes T helper (Th)1-type immune responses. This study investigates the association between IL-18 promoter polymorphisms and RA susceptibility. A total of 2471 Japanese case-control samples (1493 RA patients and 978 healthy controls) were examined. Three haplotype tag single-nucleotide polymorphisms, rs1946518A/C, rs360718T/G, and rs360722T/C, spanning from the 5'UTR to intron 1 were genotyped using allelic discrimination with the use of specific TaqMan probes, and three haplotypes (A-T-T, C-T-C, and A-G-C) were determined. Among these polymorphisms, the frequency of the T allele at rs360722, which tags the A-T-T haplotype, was significantly lower in the RA patient group compared with the normal subjects [0.46 versus 0.49, P = 0.0061, Fisher's exact probability test, odds ratio (OR) = 0.85, 95% confidence interval (CI) = 0.75-0.95]. Having the T/T genotype further increased the significance (0.20 versus 0.27, P = 0.0006, OR = 0.72, 95% CI = 0.58-0.86). Therefore, presence of the T allele and T/T genotype at rs360722 reduces the susceptibility of Japanese people to RA.
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Affiliation(s)
- Tomoko Sugiura
- Institute of Rheumatology, Tokyo Women's Medical University School of Medicine, 10-22 Kawada-cho, Shinjuku-ku, Tokyo, 162-0054, Japan
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Morris EE, Amria MY, Kistner-Griffin E, Svenson JL, Kamen DL, Gilkeson GS, Nowling TK. A GA microsatellite in the Fli1 promoter modulates gene expression and is associated with systemic lupus erythematosus patients without nephritis. Arthritis Res Ther 2010; 12:R212. [PMID: 21087477 PMCID: PMC3046520 DOI: 10.1186/ar3189] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Revised: 10/07/2010] [Accepted: 11/18/2010] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION The transcription factor Fli1 is implicated in the pathogenesis of systemic lupus erythematosus (SLE). Recently, a GA(n) polymorphic microsatellite was characterized in the mouse Fli1 promoter that modulates promoter activity and is truncated in two lupus mouse models compared to non-autoimmune prone mice. In this work, we characterize a homologous GA(n) microsatellite in the human Fli1 promoter. The purpose of this study is to determine the effect of the microsatellite length on Fli1 promoter activity in vitro and to determine if the length of the GA(n) microsatellite is associated with SLE and/or specific disease characteristics. METHODS Constructs with variable lengths of the GA(n) microsatellite in the Fli1 promoter were generated and analyzed in promoter/reporter (P/R) assays in a human T cell line. Using three SLE patient cohorts and matched controls, microsatellite length was measured and association with the presence of disease and the occurrence of specific disease manifestations was assessed. RESULTS P/R assays demonstrated that the presence of a shorter microsatellite resulted in higher Fli1 promoter activity. A significant association was observed in the lupus cohort SLE in Gullah Health (SLEIGH) between the GA(26) base pair allele and absence of nephritis. CONCLUSIONS This study demonstrates that a GA(n) microsatellite in the human Fli1 promoter is highly polymorphic. The length of the microsatellite is inversely correlated to Fli1 promoter activity in a human T cell line. Although no association between microsatellite length and lupus was observed, an association between a specific microsatellite length and patients without nephritis in the SLEIGH cohort was observed.
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Affiliation(s)
- Erin E Morris
- Division of Rheumatology, Department of Medicine, Medical University of South Carolina, 96 Jonathon Lucas St, Charleston, SC 29425, USA
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Rozati R, Vanaja MC, Nasaruddin K. Genetic contribution of the interferon gamma dinucleotide-repeat polymorphism in South Indian women with endometriosis. J Obstet Gynaecol Res 2010; 36:825-31. [PMID: 20666952 DOI: 10.1111/j.1447-0756.2010.01201.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM To investigate whether the interferon-gamma (IFNG) gene dinucleotide (CA)-repeat polymorphism is responsible in part for genetic susceptibility to endometriosis in South Indian women. METHODS Following extraction of genomic DNA, genotyping of interferon-gamma CA-repeat polymorphism was performed using genescan technology. RESULTS The global IFNG allele frequencies in all patients with endometriosis were significantly different from those in the control women (chi(2) = 37.062; 6 degrees of freedom; P < or = 0.0001). Significant difference was observed in global allele frequencies between the control women and each clinical subgroup of patients with endometriosis except for patients suffering from endometriosis associated with adenomyosis. The difference was due to an increase in a12 (112 bp) allele in the patients with endometriosis and each clinical subgroup of patients with endometriosis. The distribution of the IFNG a12 genotypes was significantly different between patients with endometriosis and the control women. (chi(2) = 10.635; 2 degrees of freedom; P = 0.0049). A significant difference in the IFNG a12 genotypes was found only among the three clinical subgroups. CONCLUSION These results suggest that the IFNG gene CA-repeat polymorphism is associated with susceptibility to endometriosis in South Indian women.
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Affiliation(s)
- Roya Rozati
- Fertility Services MHRT Hospital and Research Centre, Deccan College of Medical Sciences, Hyderabad, India
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26
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Milman N, Karsh J, Booth RA. Correlation of a multi-cytokine panel with clinical disease activity in patients with rheumatoid arthritis. Clin Biochem 2010; 43:1309-14. [PMID: 20655893 DOI: 10.1016/j.clinbiochem.2010.07.012] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 07/05/2010] [Accepted: 07/13/2010] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Explore the potential use of a cytokine panel as biochemical markers of disease activity in rheumatoid arthritis (RA) patients. DESIGN AND METHODS 57 adult RA patients were assessed using five validated clinical disease activity tools: Health Assessment Questionnaire (HAQ), standard 28-joint Disease Activity Score (DAS28), DAS28 using C-reactive protein (DAS28-CRP), Clinical Disease Activity Index (CDAI), and Simple Disease Activity Index (SDAI). Plasma cytokine levels (IL-2, IL-4, IL-6, IL-8, IL-10, VEGF, IFN-γ, TNF-α, IL1α, IL1β, MCP1, and EGF) were measured in 47 of the 57 patients and correlated with clinical indicators. RESULTS We found significant correlations between plasma levels of IL-6 and all clinical measures of disease activity; Spearman coefficients (p values) were: HAQ: 0.347(0.017); DAS28: 0.409(0.005); DAS-CRP: 0.378(0.011); CDAI: 0.312(0.033); SDAI: 0.310(0.039); ESR: 0.448(0.002); and CRP: 0.513(0.001). IFN-γ also correlated with DAS-CRP: 0.309(0.039) and SDAI: 0.301(0.044). Furthermore, the levels of IL-6 and IFN-γ increased significantly with worsening disease, as defined by the European League Against Rheumatism (EULAR) classification of disease activity. CONCLUSION A significant correlation between plasma levels of IL-6 and clinical disease activity in patients with RA suggests a future role of IL6 as a disease activity marker.
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Affiliation(s)
- Nataliya Milman
- Faculty of Medicine, University of Ottawa, 451 Smyth Rd., Ottawa ON, Canada K1H 8M5
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Thye T, Ehmen C, Intemann CD, Chinbuah MA, Ziegler A, Horstmann RD, Meyer CG. Rare Human IFNG Variants. J Interferon Cytokine Res 2010; 30:219-22. [DOI: 10.1089/jir.2009.0042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Thorsten Thye
- Bernhard Nocht Institute for Tropical Medicine, Department of Molecular Medicine, Hamburg, Germany
- University at Lübeck, University Hospital Schleswig-Holstein, Campus Lübeck, Institute of Medical Biometry and Statistics, Lübeck, Germany
| | - Christa Ehmen
- Bernhard Nocht Institute for Tropical Medicine, Department of Molecular Medicine, Hamburg, Germany
| | - Christopher D. Intemann
- Bernhard Nocht Institute for Tropical Medicine, Department of Molecular Medicine, Hamburg, Germany
- University at Lübeck, University Hospital Schleswig-Holstein, Campus Lübeck, Institute of Medical Biometry and Statistics, Lübeck, Germany
| | | | - Andreas Ziegler
- University at Lübeck, University Hospital Schleswig-Holstein, Campus Lübeck, Institute of Medical Biometry and Statistics, Lübeck, Germany
| | - Rolf D. Horstmann
- Bernhard Nocht Institute for Tropical Medicine, Department of Molecular Medicine, Hamburg, Germany
| | - Christian G. Meyer
- Bernhard Nocht Institute for Tropical Medicine, Department of Molecular Medicine, Hamburg, Germany
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Association of Interferon-Gamma Gene Polymorphisms in Taiwanese Children with Biliary Atresia. J Clin Immunol 2009; 30:68-73. [PMID: 19756986 DOI: 10.1007/s10875-009-9330-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2009] [Accepted: 08/25/2009] [Indexed: 11/25/2022]
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Abstract
INTRODUCTION An increasing amount of data suggests that dysregulation of the immune system, including the cytokine network, is associated with the etiology and pathophysiology of mood disorders. Genes encoding cytokines are highly polymorphic and single nucleotide polymorphisms, associated with increased or reduced cytokine production, have been described. The aim of this study was to define the genetic immunologic scenario associated with major depressive disorder (MDD) and bipolar disorder. METHODS Eighty-four Italian outpatients affected by bipolar disorder type I, bipolar disorder type II, or MDD, and 363 healthy controls were enrolled into the study. We analyzed allele and genotype distribution of -308 (G/A) tumor necrosis factor-a (TNF-a), +874 (T/A) interferon-g (IFN-g), -174 (G/C) interleukin (IL)-6, and -1082 (G/A) IL-10 promoter polymorphisms by Polymerase Chain Reaction Sequence Specific Primers technique. RESULTS We observed different genotype and allele distributions of TNF-a, IFN-g, and IL-10 polymorphisms in the three groups of patients analyzed. In particular, bipolar II patients were characterized by an absence of adenine (A) high producer allele of TNF-a (P<.001) and a lower percentage of TT high producer genotype of IFN-g (P<.001); bipolar I individuals showed reduced percentage of AA low producer genotype of IL-10 (P<.001). Both bipolar I and bipolar II patients not carrying guanine (G) high producer IL-6 allele showed a lower mean age at onset (P=.048). CONCLUSION These data support the existence of a genetic profile related to pro-inflammatory cytokines in patients affected by mood disorders. The differences observed across the three clinical phenotypes suggest the presence of different pathogenetic mechanisms involved in the susceptibility of phenotypically different mood disorders.
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Savan R, Ravichandran S, Collins JR, Sakai M, Young HA. Structural conservation of interferon gamma among vertebrates. Cytokine Growth Factor Rev 2009; 20:115-24. [PMID: 19268624 PMCID: PMC2755191 DOI: 10.1016/j.cytogfr.2009.02.006] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Interferon gamma (IFN-gamma), being the hallmark of the T-cell T(H)1 response, has been extensively studied with respect to its expression and regulation of immune function. This gene has been extensively characterized in many mammalian species, making it one of the most widely cloned immunoregulatory genes. Recently, the gene has been identified in avian and piscine species and we have identified the gene in the frog genome. Based on these identified DNA sequences, we have constructed an evolutionary history of IFN-gamma that shows this molecule can be traced back more than 450 million years ago. Our analysis shows that type II interferon (IFN-gamma) function evolved before the tetrapod-fish split, a finding that contrasts earlier studies showing its origins in tetrapods. The IFN-gamma gene has undergone a further duplication event in teleosts after the tetrapod-fish split suggesting a specific-evolutionary adaptation in fish. The analyses of IFN-gamma, IL-22 and IL-26 genomic region in mammals, chicken, frog and fish reveal an evolutionary conservation of the loci and several regulatory elements controlling IFN-gamma gene transcription. Furthermore, across the vertebrata, the first intron of IFN-gamma gene contains a polymorphic microsatellite that has been closely correlated with disease susceptibility. Comparative-modeling of IFN-gamma structure revealed differences among the representative species but with an overall conservation of the fold, dimer interface and some interactions with the receptor. The structural and functional conservation of IFN-gamma suggests the presence of an innate, natural killer (NK) like response or even an adaptive T(H)1 immune response in lower vertebrates.
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Affiliation(s)
- Ram Savan
- Laboratory for Experimental Immunology, Cancer and Inflammation Program, Center of Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702 USA
| | - Sarangan Ravichandran
- Advanced Biomedical Computing Center, National Cancer Institute at Frederick, Frederick, MD, 21702 USA
| | - Jack R. Collins
- Advanced Biomedical Computing Center, National Cancer Institute at Frederick, Frederick, MD, 21702 USA
| | - Masahiro Sakai
- Laboratory of Marine Biotechnology, University of Miyazaki, Gakuen kibanadai nishi 1-1, Miyazaki city 889-2192, Miyazaki, Japan
| | - Howard A. Young
- Laboratory for Experimental Immunology, Cancer and Inflammation Program, Center of Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702 USA
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Thye T, Intemann CD, Gyapong J, Horstmann RD, Meyer CG. A structural variant of the human interferon-gamma gene. TISSUE ANTIGENS 2009; 73:287-288. [PMID: 19254267 DOI: 10.1111/j.1399-0039.2008.01207.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The first structural IFNG variant, G54D (c.287G>A, ss105106770), located in the second exon, was identified.
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Affiliation(s)
- T Thye
- Department of Molecular Medicine, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
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Choi YK, Kwak-Kim J. Cytokine gene polymorphisms in recurrent spontaneous abortions: a comprehensive review. Am J Reprod Immunol 2008; 60:91-110. [PMID: 18573127 DOI: 10.1111/j.1600-0897.2008.00602.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
PROBLEM Cytokine gene polymorphism studies in women with recurrent spontaneous abortion (RSA) are reviewed to provide comprehensive understanding and a direction for the future investigation. METHOD OF STUDY A search of PubMed was made to identify the published data between 2001 and 2007 regarding RSA and cytokine gene polymorphisms. RESULTS Either allele and/or genotype frequencies of the following polymorphisms were reported to be significantly different between women with RSA and controls: IFN-gamma +874A-->T, TA (P = 0.01), AA (P = 0.04); IL-6, -634C-->G CG/GG (P = 0.026); IL-10, -592C-->A CC (P = 0.016); IL-1B -511C (P = 0.035), -31T (P = 0.029); IL-1RA, IL1RN*2 (P = 0.002), and IL1RN*3 (P = 0.002). None of these studies was repeatedly reported by others to be significantly different. Among these, four cytokine polymorphisms (IFN-gamma, +874A-->T; IL-1B -511C; IL-1RA, IL1RN*2, IL1RN*3) were refuted by others and rest of them were studied once. CONCLUSION Multiple cytokine polymorphisms were reported to be associated with RSA. However, a majority of studies were not confirmed by other investigators or refuted by others. Inconsistent study results might be related to: (i) the production of these cytokines is partly under genetic controls and other factors affect cytokine levels; (ii) ethnic background, environmental factors, and selection criteria for study populations are different and (iii) the possibilities exist that multiple cytokine gene polymorphisms or other genes in linkage disequilibrium may play a role in RSA.
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Affiliation(s)
- Yoon Kyong Choi
- Reproductive Medicine, Department of Obstetrics and Gynecology, Rosalind Franklin University of Medicine and Science/The Chicago Medical School, 3333 Green Bay Road, North Chicago, IL 60064, USA
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Gao N, Qiao HL, Jia LJ, Tian X, Zhang YW. Relationships between specific serum IgE, IgG, IFN-gamma level and IFN-gamma, IFNR1 polymorphisms in patients with penicillin allergy. Eur J Clin Pharmacol 2008; 64:971-7. [PMID: 18548239 DOI: 10.1007/s00228-008-0486-6] [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] [Received: 10/10/2007] [Accepted: 03/07/2008] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The findings of numerous studies have suggested that both genetic and environmental influences are involved in the pathogenesis of allergic disease and atopy. We studied the polymorphisms in the interferon (IFN)-gamma (gamma) and IFN-gamma receptor 1 (IFNR1) gene with the aim of clarifying the relationships among these polymorphisms, penicillin allergy and anti-penicillin antibodies. METHODS A restriction endonuclease fragment length polymorphism (RFLP)-PCR analysis and sequencing were used to study the IFNR1 and IFN-gamma polymorphisms. The presence and level of eight specific immunoglobulin (Ig)E and IgG antibodies were determined by the radioallergosorbent test (RAST) and enzyme-linked immunosorbent assay (ELISA), respectively. RESULTS The positive rates of specific IgE and IgG were 61.11 and 53.92%, respectively. There was no significant difference in the whole-allele of IFN-gamma distribution between patients with a penicillin allergy and control subjects. Allele 7 (18CA repeat) was significantly less frequent in the urticaria group (3.19 vs. 11.93%) than in the controls. There was no difference in IFN-gamma production among different alleles in IFN-gamma. The frequency of G/A (Val/Met) in the IFNR1 gene in allergic patients was significantly less than that in the controls (P < 0.05). There were no significant differences in the positive rate of IgE among different alleles of IFN-gamma. The same was true for the positive rate of IgG. CONCLUSIONS The Met/Val allele in IFNR1 gene may have a protective role in the non-penicillin allergic population. The allele 18CA repeat in IFN-gamma gene may be associated with urticaria.
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Affiliation(s)
- Na Gao
- Department of Clinical Pharmacology, School of Medicine, Zhengzhou University, Zhengzhou, People's Republic of China
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34
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Chen X, Xu J, Chen Z, Zhou Z, Feng X, Zhou Y, Ren Q, Yang R, Han ZC. Interferon-? +874A/T and interleukin-4 intron3 VNTR gene polymorphisms in Chinese patients with idiopathic thrombocytopenic purpura. Eur J Haematol 2007; 79:191-7. [PMID: 17655693 DOI: 10.1111/j.1600-0609.2007.00914.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVES The polarization of Th1/Th2 towards Th1 contributes to the pathogenesis of idiopathic thrombocytopenic purpura (ITP). Cytokines may play crucial roles in the pathogenesis of ITP. The purpose of this study was to investigate whether the interferon (IFN)-gamma +874(A/T) and interleukin-4 (IL-4) variable number of tandem repeats (VNTR) in intron3 polymorphisms may be responsible in part for genetic susceptibility to ITP. METHODS Genotyping of IFN-gamma +874A/T and IL-4 intron3 VNTR was performed in 196 patients with ITP and 128 healthy individuals by polymerase chain reaction sequence-specific primers and direct PCR respectively. RESULTS There was no association between IFN-gamma +874A/T and IL-4 intron3 VNTR polymorphism and ITP risk when all patients, as a group, were analyzed. When the patients were subdivided into two groups: childhood ITP and adult ITP, no statistical differences were found in the genotype and allele frequencies of IFN-gamma +874A/T and IL-4 intron3 VNTR between the two groups and the controls. Similar results were observed between acute childhood ITP, chronic childhood ITP, acute adult ITP or chronic adult ITP and the controls. CONCLUSION These polymorphisms were distributed similarly between the patients with ITP and the controls, demonstrating that these two candidate gene polymorphisms are not attributed to ITP susceptibility.
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Affiliation(s)
- Xiaoli Chen
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
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Wang TN, Chu YT, Chen WY, Feng WW, Shih NH, Hsiang CH, Ko YC. Association of interferon-gamma and interferon regulatory factor 1 polymorphisms with asthma in a family-based association study in Taiwan. Clin Exp Allergy 2007; 36:1147-52. [PMID: 16961714 DOI: 10.1111/j.1365-2222.2006.02551.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Asthma is a multi-factorial disorder caused by complex interactions between genetic and environmental factors. IFN-gamma and IFN regulatory factor 1 (IRF-1) affect Th1/Th2 cytokine balance, and influence the differentiation of Th2 cells, which influence the development of asthma. OBJECTIVE This study investigated CA repeats polymorphism of the IFN-gamma gene and GT repeats polymorphism of the IRF-1 gene, which may predispose individuals to asthma pathogenesis. METHODS In the present study, we used the transmission/disequilibrium test (TDT) to investigate the relationship between asthma and the IFN-gamma and IRF-1 polymorphisms by studying 348 subjects composed of 232 parents and 116 asthmatic children. RESULTS For global TDT test, IFN-gamma CA repeats and IRF-1 GT repeat polymorphisms showed a significant association with asthma in children (P=0.009 and 0.017, respectively). We demonstrated that 13 CA repeats (138 bp) of IFN-gamma gene and 11 GT repeats (306 bp) of IRF-1 gene are significantly preferentially transmitted to asthmatic children (T/NT=89/61, chi2=8.43, P<0.005 and T/NT=75/49, chi2=8.18, P<0.005, respectively). The offspring will have an increased risk of asthma when their parents transmit IFN-gamma 13 CA repeats (OR=1.83, P=0.009) and IRF1 11 GT repeats (OR=1.88, P=0.007) to them. But we observed that the IFN-gamma and IRF-1 polymorphisms are not associated with IgE concentrations. CONCLUSION These findings provide strong evidence of which IFN-gamma CA repeat and IRF-1 GT repeat polymorphisms influence the risk of asthma for children in Taiwan.
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Affiliation(s)
- T-N Wang
- Faculty of Public Health, Kaohsiung Medical University, Kaohsiung, Taiwan
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36
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Rekha PL, Ishaq M, Valluri V. A differential association of interferon-gamma high-producing allele T and low-producing allele A (+874 A/T) with Hashimoto's thyroiditis and Graves' disease. Scand J Immunol 2006; 64:438-43. [PMID: 16970687 DOI: 10.1111/j.1365-3083.2006.01834.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cytokines play a crucial role in the pathogenesis of autoimmune thyroid disease. The aim of this study was to investigate the relationship of the single base change polymorphic variants identified in the first intron of interferon-gamma (IFN-gamma) (+874 T/A) with susceptibility to thyroid dysfunctions. A total of 340 subjects were included in the study comprising of 190 patients (104 patients with Hashimoto's thyroiditis, 26 with non-Hashimoto's hypothyroidism and 60 Graves' disease) and 150 controls. Genotyping was done by amplification refractory mutation system-polymerase chain reaction using a set of sequence-specific primers. Statistical analysis revealed a significant association between high IFN-gamma-producing genotype TT and Hashimoto's thyroiditis compared to controls (P value < 0.001). On the other hand, the frequency of genotype TT was decreased in patients with Graves' hyperthyroidism with a significant increase in low IFN-gamma-producing genotype AA among this group (P = 0.03). To conclude the results of the study suggest a differential association of high- and low-producing alleles of IFN-gamma gene with Hashimoto's thyroiditis and Graves' disease. The high IFN-gamma-producing allele T was observed to be associated with Hashimoto's thyroiditis in the present study where as in Graves' hyperthyroidism the association was observed to be stronger with the low producing allele A.
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Affiliation(s)
- P L Rekha
- Immunogenetics Lab, Department of Genetics, Osmania University, Hyderabad, Andhra Pradesh, India.
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37
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Lee EY, Yim JJ, Lee HS, Lee YJ, Lee EB, Song YW. Dinucleotide repeat polymorphism in intron II of human Toll-like receptor 2 gene and susceptibility to rheumatoid arthritis. Int J Immunogenet 2006; 33:211-5. [PMID: 16712654 DOI: 10.1111/j.1744-313x.2006.00599.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Human Toll-like receptors (TLRs) participate in innate immune response and signal the activation of adaptive immunity. The presence of a functional intronic polymorphism consisting of guanine-thymine repeats in TLR2 gene was recently reported. Here, we investigated a dinucleotide repeat polymorphism in intron II of TLR2 in Korean patients with rheumatoid arthritis (RA). The numbers of guanine-thymine [(GT)(n)] repeats in intron II of the TLR 2 gene were counted in 183 patients with RA and in 148 healthy controls, using the gene scanning technique. We classified alleles into two subclasses for further analysis, 12-16 GT repeats (S allele) and 17-28 repeats (L allele). By subgroup analysis, we also examined whether the S allele is associated with the presence of shared epitope (SE), rheumatoid factor (RF), joint erosion and extra-articular complications. S-allele frequency was significantly increased in patients with RA than in healthy controls [30.3% vs. 23.0%, P = 0.03, or 1.46, 95% confidence interval (CI) 1.03-2.07], and genotypes containing S alleles were more frequent in patients with RA than in healthy controls (54.4% vs. 46.5%. P = 0.04, or 1.57, 95% CI 1.01-2.42). A skewed S-allele distribution was not found to be related to the presence of SE. Subgroup analysis showed no genotypic or allele frequency differences between patients with/without RF, joint erosion, or extra-articular complications. Genotype containing shorter GT repeats in intron II of the TLR2 gene may confer susceptibility to RA in Koreans.
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Affiliation(s)
- E Y Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University College of Medicine, Korea
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Yu H, Zhu QR, Gu SQ, Fei LE. Relationship between IFN-γ gene polymorphism and susceptibility to intrauterine HBV infection. World J Gastroenterol 2006; 12:2928-31. [PMID: 16718821 PMCID: PMC4087813 DOI: 10.3748/wjg.v12.i18.2928] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To explore the susceptibility of children to intrauterine HBV infection by studying the relationship between IFN-γ gene polymorphism, including IFN-γ+874A/T single nucleotide polymorphism(SNP) and CA repeat microsatellite polymorphism and intrauterine HBV infection.
METHODS: A TaqMan fluorescence polymerase chain reaction in the IFN-γ+874A/T single nucleotide polymorphism was tested in the intrauterine HBV infection group(group I) and the normal immune children group(group II). Capillary electrophoresis was performed in the above two groups to assay the IFN-γ CA repeat microsatellite polymorphism.
RESULTS: Frequencies of AA, AT and TT genotypes were 67.4%, 19.6% and 13.0% in the intrauterine HBV infection group, and 45.2%, 30.1% and 24.7% in the normal immune children group, respectively. A significant difference was found in the frequency distribution of IFN-γ+874 genotype between the two groups (χ2 = 5.102, P = 0.02389). In the intrauterine HBV infection group the AA genotype was more common than in the normal immune group. Frequency of IFN-γ+874A allele was 77.17% in the intrauterine HBV infection group, and 60.27% in the normal immune children group. In the intrauterine HBV infection group the IFN-γ+874A allele was more common than in normal immune group. A significant difference was found in the frequency distribution between the two groups (χ2 = 7.238, P = 0.02389, OR = 2.228, 95% CI = 1.244-3.992). (CA12)+/(CA12)+ of IFN-γ CA microsatellite polymorphism was 11.90% in the intrauterine HBV infection group and 26.47% in the normal immune children group. A significant difference was found in the frequency distribution between the two groups (χ2 = 5.64, P = 0.0176). Frequency of IFN-γ CA repeat was 25% in the intrauterine HBV infection group and 43.38% in the normal immune children group. The frequency of IFN-γ CA repeat was less in the intrauterine HBV infection group than in normal immune group. A significant difference was found in the frequency distribution between the two groups (χ2 = 7.548, P = 0.0060).
CONCLUSION: There is a relationship between IFN-γ+874A/T SNP and intrauterine HBV infection as well as between IFN-γ CA microsatellite polymorphism and intrauterine HBV infection. IFN-γ gene polymorphism might be important in determining individual’s susceptibility to intrauterine HBV infection.
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Affiliation(s)
- Hui Yu
- Department of Infectious Disease, Children's Hospital of Fudan University, Shanghai 200032, China.
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39
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Choi SJ, Rho YH, Ji JD, Song GG, Lee YH. Genome scan meta-analysis of rheumatoid arthritis. Rheumatology (Oxford) 2005; 45:166-70. [PMID: 16278286 DOI: 10.1093/rheumatology/kei128] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVE Genome scans for rheumatoid arthritis (RA) have yielded inconsistent results. The absence of replication of linkage might be due to lack of power of individual studies. We performed a genome scan meta-analysis of published data to increase statistical power and to assess evidence for linkage of RA across genome scan studies. METHODS Four RA whole-genome scans containing 767 families with 964 sibling pairs were included for the genome scan meta-analysis (GSMA). The GSMA method was applied to pool the results obtained from four genome scans. For each study, 120 genomic bins of approximately 30 centimorgans were defined and ranked according to maximum evidence for linkage within each bin. Bin ranks were weighted and summed across all studies. The summed rank for each bin was assessed empirically for significance using permutation methods. RESULTS A total of nine bins lay above the 95% confidence level (P=0.05) and four bins were above the 99% confidence level (P=0.01) in the RA GSMA, suggesting that these bins contain RA-linked loci: bins 6.2, 6.4, 8.1, 18.3, 12.3, 12.2, 1.5, 6.3 and 16.2. The strongest evidence for linkage occurred on chromosome 6p22.3-6p21.1 (bin 6.2), containing the HLA region (P(sumrnk)=0.0000008). CONCLUSION This RA GSMA confirmed the evidence for HLA loci as the greatest susceptibility factor to RA and showed evidence for linkage at non-HLA loci, such as chromosomes 1p, 6, 8p, 12, 16 and 18q, across studies. These data may provide a basis to carry out targeted linkage and candidate gene studies, particularly in the regions.
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Affiliation(s)
- S J Choi
- Division of Rheumatology, Department of Internal Medicine, Korea University Medical Center, 126-1 Ka, Anam-Dong, Seongbuk-Ku, Seoul 136-705, Korea
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Koch O, Rockett K, Jallow M, Pinder M, Sisay-Joof F, Kwiatkowski D. Investigation of malaria susceptibility determinants in the IFNG/IL26/IL22 genomic region. Genes Immun 2005; 6:312-8. [PMID: 15858598 DOI: 10.1038/sj.gene.6364214] [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: 11/09/2022]
Abstract
Interferon-gamma, encoded by IFNG, is a key immunological mediator that is believed to play both a protective and a pathological role in malaria. Here, we investigate the relationship between IFNG variation and susceptibility to malaria. We began by analysing West African and European haplotype structure and patterns of linkage disequilibrium across a 100 kb genomic region encompassing IFNG and its immediate neighbours IL22 and IL26. A large case-control study of severe malaria in a West Africa population identified several weak associations with individual single-nucleotide polymorphisms in the IFNG and IL22 genes, and defined two IL22 haplotypes that are, respectively, associated with resistance and susceptibility. These data provide a starting point for functional and genetic analysis of the IFNG genomic region in malaria and other infectious and inflammatory conditions affecting African populations.
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Affiliation(s)
- O Koch
- Wellcome Trust Centre for Human Genetics, Oxford, UK
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41
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Cheung BMY, Leung RYH, Man YB, Wong LYF, Lau CP. Association of essential hypertension with a microsatellite marker on chromosome 17. J Hum Hypertens 2005; 19:407-11. [PMID: 15716982 DOI: 10.1038/sj.jhh.1001835] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Hypertension is related to sodium intake, and many patients with essential hypertension are overweight and have the metabolic syndrome. We therefore studied microsatellite markers close to the thiazide-sensitive Na-Cl cotransporter on chromosome 16 and a quantitative trait locus for abdominal obesity-metabolic syndrome (AOMS2) on chromosome 17, which have been found to be linked to hypertension in a previous genome scan in Chinese. There were 84 hypertensive subjects (44 men, 40 women, age 53+/-13 years) and 88 normotensive controls (40 men, 48 women, age 54+/-13 years) recruited. Specific oligonucleotide primers were used to amplify genomic DNA spanning the microsatellite markers D16S3396 and D17S1303 that consist of ATA and GATA repeats, respectively. We did not find any association between D16S3396 and blood pressure. In contrast, the distribution of D17S1303 genotypes differed between hypertensive subjects and normal controls (P = 0.014). The number of GATA repeats correlated inversely with diastolic blood pressure (r = -0.18, P = 0.02) and body mass index (r = -0.12, P = 0.01). Nine GATA repeats in D17S1303 were associated with hypertension (OR 2.19, 95% CI 1.08-4.44, P = 0.027), while 14 GATA repeats were associated with normotension (OR 0.26, 95% CI 0.10-0.66, P = 0.002). The diastolic blood pressure in those with or without the (GATA)9 allele was 85.9+/-13.6 and 79.2+/-13.6 mmHg respectively (P = 0.01), and in those with or without the (GATA)14 allele it was 73.8+/-11.0 and 81.8+/-14.0 mmHg respectively (P = 0.003). Our results provide further evidence that a gene predisposing to hypertension in Chinese is in the vicinity of the microsatellite D17S1303.
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Affiliation(s)
- B M Y Cheung
- Department of Medicine, University of Hong Kong, Hong Kong.
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Gracie JA, Koyama N, Murdoch J, Field M, McGarry F, Crilly A, Schobel A, Madhok R, Pons-Kühnemann J, McInnes IB, Möller B. Disease association of two distinct interleukin-18 promoter polymorphisms in Caucasian rheumatoid arthritis patients. Genes Immun 2005; 6:211-6. [PMID: 15789055 DOI: 10.1038/sj.gene.6364183] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Interleukin (IL)-18 is an important mediator of innate and adaptive immunity. We searched for an association of IL-18 promoter single-nucleotide polymorphisms (SNP) with rheumatoid arthritis (RA) in Caucasians. The entire study population was composed of two independent cohorts from Germany (n=200) and Scotland (n=410). Presence of IL-18 SNP at positions -607 and -137 was determined by allele-specific PCR in 327 RA patients and 283 healthy donors (HD). Diplotype distributions of both loci were in Hardy-Weinberg equilibrium (HWE) in the German and Scottish HD cohorts. In contrast, locus -607 was in HW disequilibrium in German, and locus -137 in Scottish RA patients. Diplotypic exact chi(2) tests suggested that -607CC was overrepresented in German, and -137CC in Scottish RA patients, but conservative chi(2) trend analyses could not prove any significant disease association of these single loci. SNP -607 and -137 were in strong linkage disequilibrium. The -607C(*)-137C haplotype was more prevalent in German RA (3.2 vs 1.2%) and in Scottish RA patients (4.1 vs 0.9%) than in the respective HD cohorts. These observations suggest that SNP of both positions contribute to the genetic background of RA pathogenesis.
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Affiliation(s)
- J A Gracie
- Centre for Rheumatic Diseases, University of Glasgow, Glasgow, Scotland, UK
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Saha A, Dhir A, Ranjan A, Gupta V, Bairwa N, Bamezai R. Functional IFNG polymorphism in intron 1 in association with an increased risk to promote sporadic breast cancer. Immunogenetics 2005; 57:165-71. [PMID: 15900487 DOI: 10.1007/s00251-005-0783-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2004] [Revised: 01/18/2005] [Indexed: 10/25/2022]
Abstract
Interferon (IFN)-gamma is an important Th1 cytokine, which plays a role in immune surveillance and anti-tumor activity. A case-control study involving 54 sporadic breast cancer patients and 144 healthy controls was carried out to explore if the genotype variation of a proposed non-specific enhancer element with a dinucleotide (CA)n repeat in intron 1 has a role in the susceptibility to promote sporadic breast cancer. Genotype analysis carried out by single-strand length polymorphism and confirmed by sequencing showed an increased frequency of (CA)12 allele (P<0.001) and decreased frequencies of (CA)15 (P<0.01) and (CA)>15 (p<0.001) alleles in sporadic breast cancer patients as compared to controls. Further, in vitro reporter assays for (CA)12 and (CA)15 alleles suggested these to be associated with decreased and increased expressions, respectively, suggesting the (CA)12/(CA)12 background to act as one of the factors that could lead to low production of IFN-gamma. The study concludes that such genetic background for a proposed non-specific enhancer element with (CA)n repeat within intron 1 of the IFNG gene might put the individuals with this genotype at higher risk to promote the development of sporadic breast cancer due to a resultant compromised immune surveillance.
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Affiliation(s)
- Anjana Saha
- National Centre of Applied Human Genetics, School of Life Sciences, Jawaharlal Nehru University, 110067 New Delhi, India
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Andersson L, Petersen G, Johnson P, Ståhl F. A web tool for finding gene candidates associated with experimentally induced arthritis in the rat. Arthritis Res Ther 2005; 7:R485-92. [PMID: 15899035 PMCID: PMC1174944 DOI: 10.1186/ar1700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2004] [Revised: 01/20/2005] [Accepted: 01/24/2005] [Indexed: 01/05/2023] Open
Abstract
Rat models are frequently used for finding genes contributing to the arthritis phenotype. In most studies, however, limitations in the number of animals result in a low resolution. As a result, the linkage between the autoimmune experimental arthritis phenotype and the genomic region, that is, the quantitative trait locus, can cover several hundred genes. The purpose of this work was to facilitate the search for candidate genes in such regions by introducing a web tool called Candidate Gene Capture (CGC) that takes advantage of free text data on gene function. The CGC tool was developed by combining genomic regions in the rat, associated with the autoimmune experimental arthritis phenotype, with rat/human gene homology data, and with descriptions of phenotypic gene effects and selected keywords. Each keyword was assigned a value, which was used for ranking genes based on their description of phenotypic gene effects. The application was implemented as a web-based tool and made public at . The CGC application ranks gene candidates for 37 rat genomic regions associated with autoimmune experimental arthritis phenotypes. To evaluate the CGC tool, the gene ranking in four regions was compared with an independent manual evaluation. In these sample tests, there was a full agreement between the manual ranking and the CGC ranking for the four highest-ranked genes in each test, except for one single gene. This indicates that the CGC tool creates a ranking very similar to that made by human inspection. The exceptional gene, which was ranked as a gene candidate by the CGC tool but not in the manual evaluation, was found to be closely associated with rheumatoid arthritis in additional literature studies. Genes ranked by the CGC tools as less likely gene candidates, as well as genes ranked low, were generally rated in a similar manner to those done manually. Thus, to find genes contributing to experimentally induced arthritis, we consider the CGC application to be a helpful tool in facilitating the evaluation of large amounts of textual information.
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Affiliation(s)
- Lars Andersson
- Department of Cell and Molecular Biology – Genetics, Goteborg University, Sweden
| | - Greta Petersen
- Department of Cell and Molecular Biology – Genetics, Goteborg University, Sweden
| | - Per Johnson
- Department of Cell and Molecular Biology – Genetics, Goteborg University, Sweden
| | - Fredrik Ståhl
- Department of Cell and Molecular Biology – Genetics, Goteborg University, Sweden
- School of Health Sciences, University College of Borås, Borås, Sweden
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Noponen-Hietala N, Virtanen I, Karttunen R, Schwenke S, Jakkula E, Li H, Merikivi R, Barral S, Ott J, Karppinen J, Ala-Kokko L. Genetic variations in IL6 associate with intervertebral disc disease characterized by sciatica. Pain 2005; 114:186-94. [PMID: 15733644 DOI: 10.1016/j.pain.2004.12.015] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2004] [Revised: 11/18/2004] [Accepted: 12/13/2004] [Indexed: 01/15/2023]
Abstract
Intervertebral disc disease (IDD) characterized by sciatica is a common disorder affecting about 5% of individuals. Environmental factors can predispose to this disease, but IDD has a strong genetic background. Recent evidence suggests that inflammation is one of the key factors in the etiology of IDD. Here, a possible role of the inflammatory mediator genes was studied in 155 patients with IDD-related sciatica and 179 controls. Forty-eight patients were analyzed for mutations in the IL1A, IL1B, IL6 and TNFA genes, and 16 polymorphisms in 10 candidate cytokine genes (IL1A, IL1B, IL1RN, TNFA, IL2, IL4, IL4R, IL6, IL10, IFNG) were genotyped from all subjects. No disease-causing mutations were identified in IL1A, IL1B, IL6 or TNFA. Allele frequencies were, however, significantly different between the two groups for IL6 SNP, T15A in exon 5 (P=0.007). Furthermore, the genotypes AA and AT of the exon 5 SNP were more common in the patients (P=0.011; OR=4.4, 95% CI=1.2-15.7; AR=7.5%, 1.6-13.1%). Haplotypes were then generated for four IL6 SNPs, G-597A, G-572C, G-174C, and T15A in exon 5. Haplotype GGGA was more common in the patients (P=0.011; OR=4.8, 95% CI=1.6-14.5). To evaluate attributable risk, haplotype pairs were assigned for the individuals. The presence of GGGA/GGGA or GGGA/other genotypes had an OR of 5.4 (95% CI=1.5-19.2). Association of GGGA with disease was highly significant (P=0.0033), and the associated AR was 6.8% (1.9-11.5%). These findings support the role of IL-6 genetic variations in discogenic pain.
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Affiliation(s)
- Noora Noponen-Hietala
- Collagen Research Unit, Biocenter and Department of Medical Biochemistry and Molecular Biology, University of Oulu, Aapistie 5A, 90220 Oulu, Finland
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Woolley N, Mustalahti K, Mäki M, Partanen J. Cytokine Gene Polymorphisms and Genetic Association with Coeliac Disease in the Finnish Population. Scand J Immunol 2005; 61:51-6. [PMID: 15644122 DOI: 10.1111/j.0300-9475.2005.01525.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Coeliac disease (CD) is an intestinal disorder caused by intolerance to dietary gluten in susceptible individuals. The HLA-DQ genes are major risk factors for CD, but other genes also play an important role in the disease susceptibility. Immune-mediated mechanisms are known to underlie the pathogenesis of CD. We studied single-nucleotide polymorphisms in transforming growth factor (TGF)-beta1, interleukin (IL)-10, IL-6, interferon (IFN)-gamma and tumour necrosis factor (TNF)-alpha genes in the Finnish population using family-based association approach. In addition, we genotyped a trinucleotide repeat polymorphism in the major histocompatibility complex (MHC) class I chain-related protein A (MICA) gene, located in the human leucocyte antigen (HLA) region in the vicinity of TNF-alpha. To control the effect of linkage disequilibrium between HLA-DQ genes and MICA and TNF-alpha, an HLA-stratified association analysis was performed. We did not find evidence of association between TGF-beta1, IL-10, IL-6 and IFN-gamma polymorphisms and CD susceptibility. No association was found for any of the MICA alleles independently of DQ genes, whereas TNF-alpha-308 A allele was slightly overrepresented on chromosomes carried by CD patients compared with control chromosomes, indicating that either TNF-alpha, or another gene in linkage disequilibrium with it, could confer increased susceptibility to CD. This result supports the earlier findings that the HLA region harbours a novel susceptibility factor in addition to HLA-DQ.
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Affiliation(s)
- N Woolley
- Research Laboratory and Department of Tissue Typing, Finnish Red Cross Blood Service, Helsinki, Finland.
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Gourley IS, Denofrio D, Rand W, Desai S, Loh E, Kamoun M. The effect of recipient cytokine gene polymorphism on cardiac transplantation outcome. Hum Immunol 2004; 65:248-54. [PMID: 15041164 DOI: 10.1016/j.humimm.2004.01.008] [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: 09/12/2003] [Revised: 01/11/2004] [Accepted: 01/16/2004] [Indexed: 10/26/2022]
Abstract
We determined the association between clinical outcomes after heart transplantation and gene polymorphism in five cytokines (tumor necrosis factor-alpha, transforming growth factor (TGF)-beta, interleukin-10, interleukin-6, and interferon-gamma) reported to influence expression in vitro. Ninety-five patients were studied. Cytokine genotyping was performed by sequence specific priming polymerase chain reaction. Clinical outcomes studied in the first posttransplant year included: (1) documented viral, bacterial, or fungal infection; (2) cytomegalovirus infection; (3) acute cellular rejection (International Society for Heart and Lung Transplantation > or = grade IIIA); (4) time to first rejection episode; and (5) the development of allograft vasculopathy. Patients with the TGF-beta genotype 10 T/T 25 G/G or 10 T/C 25 G/G had a longer time to first rejection (median time to first rejection episode 321 days) than those with the TGF-beta genotype 10C/C 25 G/C or 10 C/C 25 C/C (median time to first rejection 88 days). There was a trend toward a higher frequency of the tumor necrosis factor-alpha genotype -308 G/A or A/A in patients without infection (19/59, 32%) as compared with patients with infection (5/31, 16%). In both cases, these differences failed to reach significance when adjusted for multiple comparisons. No other significant association was found with clinical outcomes and polymorphisms in the five cytokine genes studied in this population.
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Affiliation(s)
- Ian S Gourley
- University of Pennsylvania Medical Center, Philadelphia, PA, USA
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Wapenaar MC, van Belzen MJ, Fransen JH, Sarasqueta AF, Houwen RHJ, Meijer JWR, Mulder CJJ, Wijmenga C. The interferon gamma gene in celiac disease: augmented expression correlates with tissue damage but no evidence for genetic susceptibility. J Autoimmun 2004; 23:183-90. [PMID: 15324937 DOI: 10.1016/j.jaut.2004.05.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2004] [Revised: 05/12/2004] [Accepted: 05/24/2004] [Indexed: 12/19/2022]
Abstract
Celiac disease (CD) is a complex genetic disorder characterized by gluten intolerance. The Th1 immune response, with a key position for interferon gamma (IFN-gamma), is an important determinant of intestinal remodeling in CD. We aimed at further ascertaining the role of IFN-gamma, either as a genetic factor in the etiology, or as a facilitator of disease initiation/progression. Duodenal biopsies were sampled across distinct histopathological stages of the disease, including refractory CD (RCD), and used to determine IFN-gamma gene (IFNG) expression by real-time RT-PCR. INFG expression correlated with the extent of tissue restructuring, reaching a 240-fold higher expression in total villous atrophy compared to healthy tissue. CD and RCD patients with similar lesions had comparable expression levels. Interestingly, patients in complete remission still had 7.6-fold residual over-expression. An INFG marker was tested in three cohorts of Dutch patients for both genetic linkage and association. Linkage analysis yielded no significant scores for IFNG or its flanking markers. In addition, IFNG allele frequencies were not differently distributed between cases and controls. Likewise, all alleles were randomly transmitted to affected children in parents-case trios. There is no evidence for IFNG as a predisposing gene in CD, despite its enhanced expression in patients in complete remission.
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Affiliation(s)
- Martin C Wapenaar
- Department of Biomedical Genetics, University Medical Center Utrecht, Utrecht, The Netherlands.
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Yim JJ, Ding L, Schäffer AA, Park GY, Shim YS, Holland SM. A microsatellite polymorphism in intron 2 of human Toll-like receptor 2 gene: functional implications and racial differences. ACTA ACUST UNITED AC 2004; 40:163-9. [PMID: 14987735 DOI: 10.1016/s0928-8244(03)00342-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2003] [Revised: 10/21/2003] [Accepted: 10/24/2003] [Indexed: 10/26/2022]
Abstract
The human Toll-like receptor 2 (TLR2) mediates responses of both innate and adaptive immunity to Gram-positive bacteria, including mycobacteria. We sought functional polymorphisms in the 5'-untranslated region (UTR) of TLR2. We found a highly polymorphic (GT)n dinucleotide repeat 100 bp upstream of the TLR2 translational start site in intron 2. The numbers of GT repeats varied from 12 to 28. There were significant differences in allele distribution between African Americans and Caucasians (P=0.008) and between African Americans and Koreans (P=0.0003). The promoter activities of recombinant promoter-intron2/reporter constructs including the shortest [GT)n=12] or longest [(GT)n=28] alleles were significantly more stimulated when exposed to 200 IU ml(-1) of interferon-gamma than when exposed to 100 IU ml(-1) of GM-CSF (P<==0.03). Since TLR2 plays a critical role in the human innate immune response, this functional microsatellite polymorphism may be important in the pathogenesis of infectious and inflammatory diseases.
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Affiliation(s)
- Jae-Joon Yim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine and Lung Institute, Seoul National University College of Medicine, Seoul, South Korea
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50
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Schrijver HM, Hooper-van Veen T, van Belzen MJ, Crusius JBA, Peña AS, Barkhof F, Polman CH, Uitdehaag BMJ. Polymorphisms in the genes encoding interferon-gamma and interferon-gamma receptors in multiple sclerosis. EUROPEAN JOURNAL OF IMMUNOGENETICS : OFFICIAL JOURNAL OF THE BRITISH SOCIETY FOR HISTOCOMPATIBILITY AND IMMUNOGENETICS 2004; 31:133-40. [PMID: 15182327 DOI: 10.1111/j.1365-2370.2004.00456.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Genome screens suggest that several genes, each contributing to a small extent, are involved in multiple sclerosis (MS) susceptibility. Simultaneous analysis of related genes may improve the power to detect such small effects. Interferon-gamma (IFN-gamma), mediating its effects through the IFN-gamma receptor, is a pleiotropic, pro-inflammatory cytokine for which a detrimental effect on the course of MS has been reported. The role of IFN-gamma receptor 1 (IFNGR1) and IFN-gamma receptor 2 (IFNGR2) gene polymorphisms has not been studied in MS, and, for the IFNG gene polymorphism there is only one previous study, which incorporates clinical, but not imaging, data. The aim of this study was to investigate whether polymorphisms in the IFNG and IFNGR1 and IFNGR2 genes are associated with susceptibility to MS, or disease characteristics, as defined by clinical and imaging criteria. Genotypes for IFNG, IFNGR1 and IFNGR2 were determined in 509 patients with MS and in 193 healthy controls. Patient files were reviewed for disease course, age at onset of disease, and rate of progression. Serial magnetic resonance imaging (MRI) data were available for 107 patients. No significant differences in the distribution of IFNG, IFNGR1 and IFNGR2 genotype and allele frequencies were found between patients and controls. A progressive, as opposed to a relapsing, onset was significantly more frequent in carriers of the IFNGR2 allele Arg64 (P = 0.028). Moreover, IFNGR2 allele Arg64 carriers had a lower black hole ratio than non-carriers (P = 0.016). No other associations with clinical parameters, such as age at onset or rate of progression, or with imaging parameters, were observed. The IFNG intron 1 gene polymorphism studied is unlikely to play a major role in MS susceptibility or disease course. The IFNGR1 and IFNGR2 gene polymorphisms studied do not exert an important influence on MS susceptibility, but allele IFNGR2*Arg64 may be associated with a progressive disease onset.
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Affiliation(s)
- H M Schrijver
- Department of Neurology, University Medical Center Utrecht, The Netherlands.
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