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Jarrar W, Khdair SI, Khudeir FA. MICA Polymorphism and Genetic Predisposition to T1D in Jordanian Patients: A Case-Control Study. Life (Basel) 2022; 12:life12111813. [PMID: 36362968 PMCID: PMC9693396 DOI: 10.3390/life12111813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022] Open
Abstract
Type 1 diabetes (T1D) is an autoimmune disorder whose etiology includes genetic and environmental factors. The non-classical Major Histocompatibility Complex (MHC) class I chain-related gene A (MICA) gene has been associated with increased susceptibility to T1D as the interaction of MICA to the Natural Killer Group 2D (NK2GD) receptors found on the cell surface of natural killer (NK) cells and T cells is responsible for inducing immune responses. MICA polymorphisms were reported in association with T1D among different ethnic groups. However, data from different populations revealed conflicting results, so the association of MICA polymorphisms with predisposition to T1D remains uncertain. The aim of this sequencing-based study was to identify, for the first time, the possible MICA alleles and/or genotypes that could be associated with T1D susceptibility in the Jordanian population. Polymorphisms in exons 2–4 and the short tandem repeats (STR) in exon 5 of the highly polymorphic MICA gene were analyzed. No evidence for association between T1D and MICA alleles/genotypes was found in this study, except for the MICA*011 allele which was found to be negatively associated with T1D (p = 0.023, OR = 0.125). In conclusion, MICA polymorphisms seem not to be associated with increasing T1D susceptibility in Jordanian patients.
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Affiliation(s)
- Wassan Jarrar
- Department of Pharmacy, Faculty of Pharmacy, Al-Zaytoonah University of Jordan, Amman 11733, Jordan
- Correspondence:
| | - Sawsan I. Khdair
- Department of Pharmacy, Faculty of Pharmacy, Al-Zaytoonah University of Jordan, Amman 11733, Jordan
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Ghanbari F, Yazdanpanah N, Yazdanpanah M, Richards JB, Manousaki D. Connecting Genomics and Proteomics to Identify Protein Biomarkers for Adult and Youth-Onset Type 2 Diabetes: A Two-Sample Mendelian Randomization Study. Diabetes 2022; 71:1324-1337. [PMID: 35234851 DOI: 10.2337/db21-1046] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 02/24/2022] [Indexed: 11/13/2022]
Abstract
Type 2 diabetes shows an increasing prevalence in both adults and children. Identification of biomarkers for both youth and adult-onset type 2 diabetes is crucial for development of screening tools or drug targets. In this study, using two-sample Mendelian randomization (MR), we identified 22 circulating proteins causally linked to adult type 2 diabetes and 11 proteins with suggestive evidence for association with youth-onset type 2 diabetes. Among these, colocalization analysis further supported a role in type 2 diabetes for C-type mannose receptor 2 (MR odds ratio [OR] 0.85 [95% CI 0.79-0.92] per genetically predicted SD increase in protein level), MANS domain containing 4 (MR OR 0.90 [95% CI 0.88-0.92]), sodium/potassium-transporting ATPase subunit β2 (MR OR 1.10 [95% CI 1.06-1.15]), endoplasmic reticulum oxidoreductase 1β (MR OR 1.09 [95% CI 1.05-1.14]), spermatogenesis-associated protein 20 (MR OR 1.12 [95% CI 1.06-1.18]), haptoglobin (MR OR 0.96 [95% CI 0.94-0.98]), and α1-3-N-acetylgalactosaminyltransferase and α1-3-galactosyltransferase (MR OR 1.04 [95% CI 1.03-1.05]). Our findings support a causal role in type 2 diabetes for a set of circulating proteins, which represent promising type 2 diabetes drug targets.
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Affiliation(s)
- Faegheh Ghanbari
- Research Center of the Sainte-Justine University Hospital, University of Montreal, Montreal, Quebec, Canada
| | - Nahid Yazdanpanah
- Research Center of the Sainte-Justine University Hospital, University of Montreal, Montreal, Quebec, Canada
| | - Mojgan Yazdanpanah
- Research Center of the Sainte-Justine University Hospital, University of Montreal, Montreal, Quebec, Canada
| | - J Brent Richards
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada
- Department of Medicine, McGill University, Montreal, Quebec, Canada
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
- Department of Epidemiology and Biostatistics, McGill University, Montreal, Quebec, Canada
- Department of Twin Research, King's College London, London, U.K
| | - Despoina Manousaki
- Research Center of the Sainte-Justine University Hospital, University of Montreal, Montreal, Quebec, Canada
- Departments of Pediatrics, Biochemistry and Molecular Medicine, University of Montreal, Montreal, Canada
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Machuldova A, Houdova L, Kratochvilova K, Leba M, Jindra P, Ostasov P, Maceckova D, Klieber R, Gmucova H, Sramek J, Holubova M. Single-Nucleotide Polymorphisms in MICA and MICB Genes Could Play a Role in the Outcome in AML Patients after HSCT. J Clin Med 2021; 10:jcm10204636. [PMID: 34682758 PMCID: PMC8537017 DOI: 10.3390/jcm10204636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/27/2021] [Accepted: 10/06/2021] [Indexed: 11/18/2022] Open
Abstract
NKG2D and its ligands, MICA and MICB, are known as the key regulators of NK cells. NK cells are the first reconstituted cells after the allogeneic hematopoietic stem cell transplantation (HSCT); therefore, it is crucial to understand their role in HSCT outcome. In the presented study, we investigated the single amino acid changes across the exons 2–4 of MICA and MICB genes, and point mutations within the NKG2D gene, which defines the type of NKG2D haploblock (HNK/LNK) in the donors (n = 124), as well as in patients with acute myeloid leukemia (n = 78). In our cohort, we found that graft from a donor with at least one MICA allele containing glycine at position 14 (MICA-14Gly) is significantly associated with deterioration of a patient’s overall survival (OS) (p < 0.05). We also observed a negative effect of MICB-58 (Lys → Glu) polymorphism on relapse-free survival (RFS), although it was not statistically significant in multivariate analysis (p = 0.069). To our knowledge, this is the first work describing the role of MICA-14 and MICB-58 polymorphisms on HSCT outcome.
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Affiliation(s)
- Alena Machuldova
- Laboratory of Tumor Biology and Immunotherapy, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, 323 00 Pilsen, Czech Republic; (P.O.); (D.M.); (R.K.)
- Department of Histology and Embryology, Faculty of Medicine in Pilsen, Charles University, 301 66 Pilsen, Czech Republic;
- Correspondence: (A.M.); (M.H.)
| | - Lucie Houdova
- NTIS, Faculty of Applied Sciences, University of West Bohemia, 301 00 Pilsen, Czech Republic; (L.H.); (K.K.); (M.L.)
| | - Katerina Kratochvilova
- NTIS, Faculty of Applied Sciences, University of West Bohemia, 301 00 Pilsen, Czech Republic; (L.H.); (K.K.); (M.L.)
| | - Martin Leba
- NTIS, Faculty of Applied Sciences, University of West Bohemia, 301 00 Pilsen, Czech Republic; (L.H.); (K.K.); (M.L.)
| | - Pavel Jindra
- Department of Haematology and Oncology, University Hospital Pilsen, 304 60 Pilsen, Czech Republic; (P.J.); (H.G.)
| | - Pavel Ostasov
- Laboratory of Tumor Biology and Immunotherapy, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, 323 00 Pilsen, Czech Republic; (P.O.); (D.M.); (R.K.)
| | - Diana Maceckova
- Laboratory of Tumor Biology and Immunotherapy, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, 323 00 Pilsen, Czech Republic; (P.O.); (D.M.); (R.K.)
| | - Robin Klieber
- Laboratory of Tumor Biology and Immunotherapy, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, 323 00 Pilsen, Czech Republic; (P.O.); (D.M.); (R.K.)
| | - Hana Gmucova
- Department of Haematology and Oncology, University Hospital Pilsen, 304 60 Pilsen, Czech Republic; (P.J.); (H.G.)
| | - Jiri Sramek
- Department of Histology and Embryology, Faculty of Medicine in Pilsen, Charles University, 301 66 Pilsen, Czech Republic;
- Department of Haematology and Oncology, University Hospital Pilsen, 304 60 Pilsen, Czech Republic; (P.J.); (H.G.)
| | - Monika Holubova
- Laboratory of Tumor Biology and Immunotherapy, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, 323 00 Pilsen, Czech Republic; (P.O.); (D.M.); (R.K.)
- Department of Haematology and Oncology, University Hospital Pilsen, 304 60 Pilsen, Czech Republic; (P.J.); (H.G.)
- Correspondence: (A.M.); (M.H.)
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Positive association between MIC gene polymorphism and tuberculosis in Chinese population. Immunol Lett 2019; 213:62-69. [PMID: 31400356 DOI: 10.1016/j.imlet.2019.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 07/29/2019] [Accepted: 07/30/2019] [Indexed: 11/23/2022]
Abstract
The disease progression and morbidity of tuberculosis (TB) infections are determined by virulence of the micro-organism, host genetic factors and environmental factors. The highly polymorphic MHC class I chain-related gene (MIC) could serve as a potential host genetic candidate. To investigate the association of MIC polymorphism with TB infection, 124 patients and 191 ethnically matched controls from Hunan province, Southern China, were genotyped for the MIC polymorphism using polymerase chain reaction-sequence specific priming and sequencing-based typing. The results showed that allele frequencies of MIC-sequence and MICA-STR were different in TB patients in comparison to normal controls (both P < 0.05). MICA-A4 and MICA*012:01 alleles were positive associated (OR = 2.42, 95% CI: 1.69-3.87; OR = 3.41, 95% CI: 2.19-5.33, respectively, both Pc < 0.05) while MICA -A5 were inversely associated (OR = 0.59, 95%CI: 0.41-0.94, Pc < 0.05) with TB. Homozygote MICA*012:01/012:01 was observed to have significant risk effects on TB (OR = 4.76, 95% CI: 1.94-11.69, Pc0000-0001-5151-1853 < 0.05). Additionally, MICB*008 allele conduct a significant risk effect for TB (OR = 3.17, 95%CI: 1.80-5.61, Pc < 0.05). All the data showed that MIC polymorphism was associated with the variable susceptibility to TB in Chinese population.
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Onyeaghala G, Lane J, Pankratz N, Nelson HH, Thyagarajan B, Walcheck B, Anderson KE, Prizment AE. Association between MICA polymorphisms, s-MICA levels, and pancreatic cancer risk in a population-based case-control study. PLoS One 2019; 14:e0217868. [PMID: 31166958 PMCID: PMC6550421 DOI: 10.1371/journal.pone.0217868] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 05/20/2019] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Pancreatic tumor cells may avoid immune surveillance by releasing the transmembrane major histocompatibility complex class I chain-related A (MICA) protein in soluble form (s-MICA). We hypothesized that the presence of the A5.1 polymorphism in the MICA gene, which encodes a truncated MICA protein, is associated with higher s-MICA levels and increased pancreatic cancer risk. METHODS MICA alleles and s-MICA levels were measured in 121 pancreatic cancer cases and 419 controls. General linear regression with a log transformation assessed geometric means of s-MICA levels across MICA alleles. Unconditional logistic regression was used to calculate the odds ratio (OR) and 95% confidence intervals (CI) for pancreatic cancer associated with MICA alleles. RESULTS After multivariate adjustment, participants with at least one copy of the A5.1 allele versus no A5.1 allele had 1.35 (95% CI: 1.05-1.74) times greater s-MICA levels (1.65 times higher for cases and 1.28, for controls) and increased risk of pancreatic cancer (OR = 1.91, 95% CI: 1.05-3.48). CONCLUSIONS Our study suggests higher risk of pancreatic cancer among those with the MICA A5.1 polymorphism, which may be explained by an increase in s-MICA secretion and impaired immune response. IMPACT These findings provide further evidence at the genetic and molecular level of the important role of MICA in pancreatic cancer development, and may have important implications with regards to pancreatic cancer screening.
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Affiliation(s)
- Guillaume Onyeaghala
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN, United States of America
| | - John Lane
- University of Minnesota Masonic Cancer Center, Minneapolis, MN, United States of America
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, United States of America
| | - Nathan Pankratz
- University of Minnesota Masonic Cancer Center, Minneapolis, MN, United States of America
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, United States of America
| | - Heather H. Nelson
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN, United States of America
- University of Minnesota Masonic Cancer Center, Minneapolis, MN, United States of America
| | - Bharat Thyagarajan
- University of Minnesota Masonic Cancer Center, Minneapolis, MN, United States of America
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN, United States of America
| | - Bruce Walcheck
- University of Minnesota Masonic Cancer Center, Minneapolis, MN, United States of America
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, MN, United States of America
| | - Kristin E. Anderson
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN, United States of America
- University of Minnesota Masonic Cancer Center, Minneapolis, MN, United States of America
| | - Anna E. Prizment
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, MN, United States of America
- University of Minnesota Masonic Cancer Center, Minneapolis, MN, United States of America
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Hosomi S, Grootjans J, Huang YH, Kaser A, Blumberg RS. New Insights Into the Regulation of Natural-Killer Group 2 Member D (NKG2D) and NKG2D-Ligands: Endoplasmic Reticulum Stress and CEA-Related Cell Adhesion Molecule 1. Front Immunol 2018; 9:1324. [PMID: 29973929 PMCID: PMC6020765 DOI: 10.3389/fimmu.2018.01324] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 05/28/2018] [Indexed: 01/02/2023] Open
Abstract
Natural-killer group 2 member D (NKG2D) is a well-characterized activating receptor expressed by natural killer (NK) cells, NKT cells, activated CD8+ T cells, subsets of γδ+ T cells, and innate-like T cells. NKG2D recognizes multiple ligands (NKG2D-ligands) to mount an innate immune response against stressed, transformed, or infected cells. NKG2D-ligand surface expression is tightly restricted on healthy cells through transcriptional and post-transcriptional mechanisms, while transformed or infected cells express the ligands as a danger signal. Recent studies have revealed that unfolded protein response pathways during endoplasmic reticulum (ER) stress result in upregulation of ULBP-related protein via the protein kinase RNA-like ER kinase-activating factor 4-C/EBP homologous protein (PERK-ATF4-CHOP) pathway, which can be linked to the pathogenesis of autoimmune diseases. Transformed cells, however, possess mechanisms to escape NKG2D-mediated immune surveillance, such as upregulation of carcinoembryonic antigen (CEA)-related cell adhesion molecule 1 (CEACAM1), a negative regulator of NKG2D-ligands. In this review, we discuss mechanisms of NKG2D-ligand regulation, with a focus on newly discovered mechanisms that promote NKG2D-ligand expression on epithelial cells, including ER stress, and mechanisms that suppress NKG2D-ligand-mediated killing of cancer cells, namely by co-expression of CEACAM1.
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Affiliation(s)
- Shuhei Hosomi
- Division of Gastroenterology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States.,Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Joep Grootjans
- Division of Gastroenterology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States.,Department of Gastroenterology and Hepatology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Yu-Hwa Huang
- Division of Gastroenterology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Arthur Kaser
- Division of Gastroenterology and Hepatology, Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge, United Kingdom
| | - Richard S Blumberg
- Division of Gastroenterology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
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Onyeaghala G, Nelson HH, Thyagarajan B, Linabery AM, Panoskaltsis-Mortari A, Gross M, Anderson KE, Prizment AE. Soluble MICA is elevated in pancreatic cancer: Results from a population based case-control study. Mol Carcinog 2017; 56:2158-2164. [PMID: 28470829 PMCID: PMC5590635 DOI: 10.1002/mc.22667] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 04/20/2017] [Accepted: 05/01/2017] [Indexed: 01/23/2023]
Abstract
Pancreatic cancer is diagnosed at a late stage and has one of the highest cancer mortality rates in the United States, creating an urgent need for novel early detection tools. A candidate biomarker for use in early detection is the soluble MHC class I-related chain A (s-MICA) ligand, which pancreatic tumors shed to escape immune detection. The objective of this study was to define the association between s-MICA levels and pancreatic cancer, in a population-based case-control study. S-MICA was measured in 143 pancreatic cancer cases and 459 controls. Unconditional logistic regression was used to calculate odds ratio (OR) for pancreatic cancer and 95% confidence intervals (CI). There was a positive association between increasing s-MICA levels and pancreatic cancer: compared to the lowest tertile, the ORs for pancreatic cancer were 1.25 (95%CI: 0.75-2.07) and 2.10 (95%CI: 1.29-3.42) in the second and highest tertiles, respectively (P-trend = 0.02). Our study supports previous work demonstrating a positive association between plasma s-MICA levels and pancreatic cancer.
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Affiliation(s)
- Guillaume Onyeaghala
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota
| | - Heather H Nelson
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota
- University of Minnesota Masonic Cancer Center, Minneapolis, Minnesota
| | - Bharat Thyagarajan
- University of Minnesota Masonic Cancer Center, Minneapolis, Minnesota
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota
| | - Amy M Linabery
- University of Minnesota Masonic Cancer Center, Minneapolis, Minnesota
| | - Angela Panoskaltsis-Mortari
- Division of Blood and Marrow Transplantation, Department of Pediatrics, University of Minnesota, Minneapolis, Minnesota
| | - Myron Gross
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota
| | - Kristin E Anderson
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota
- University of Minnesota Masonic Cancer Center, Minneapolis, Minnesota
| | - Anna E Prizment
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota
- University of Minnesota Masonic Cancer Center, Minneapolis, Minnesota
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Allele polymorphism and haplotype diversity of MICA/B in Tujia nationality of Zhangjiajie, Hunan Province, China. Hum Immunol 2016; 77:411-7. [DOI: 10.1016/j.humimm.2016.03.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 06/14/2015] [Accepted: 03/10/2016] [Indexed: 11/23/2022]
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9
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Wang S, Xiang Z, Wang Y, Xu H, Zhang D, Wang X, Sheng J. Expression and purification of human MHC class I-related chain molecule B-α1 domain. Protein Expr Purif 2016; 123:83-9. [PMID: 27036081 DOI: 10.1016/j.pep.2016.03.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 03/06/2016] [Accepted: 03/25/2016] [Indexed: 11/18/2022]
Abstract
Major histocompatibility complex (MHC) class I-related chain A/B (MICA/B) is a type of stress-induced molecule that plays an important role in tumor surveillance. MICA/B shares a similar structure with MHC class I molecules, but MICA/B contains a closed cleft, not an open one, in its N-terminal alpha1 domain. The alpha 1 domain was believed to have no roles in antigen presentation, because the closed cleft provides limited space for binding with known molecules, and the cleft of MICA/B have been reported no known functions. To study the possible function of the cleft located in human MICA/B's alpha 1 domain, we attempted to express the human MICB-α1 (hMICB-α1) domain allele protein, which is approximately 20.5 kDa, by utilizing an Escherichia coli (E. coli) secretory pathway. Protein expression was accomplished through the phosphate-limited inducible promoter. After purification using ammonium sulfate precipitation, phenyl hydrophobic Sepharose, SP Sepharose and HisTrap affinity Sepharose, recombinant human MICB-α1 (rhMICB-α1) was obtained with 94.3% purity. The binding capacity of rhMICB-α1 with natural killer group 2, member D (NKG2D) was evaluated in vitro. The results demonstrated that rhMICB-α1 can be prepared through the E. coli secretory pathway. Purified rhMICB-α1 protein was able to functionally bind with NKG2D. This method can be further used to obtain functionally active rhMICB-α1 protein, which can served as the basis for further studies of the possible function of the MICB cleft.
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Affiliation(s)
- Shufen Wang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; Agricultural Experiment Station for Tea and Tea Processing of Yunnan, Ministry of Agriculture, Kunming 650201, China; Tea Research Center of Yunnan, Kunming 650201, China; College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Zemin Xiang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; Agricultural Experiment Station for Tea and Tea Processing of Yunnan, Ministry of Agriculture, Kunming 650201, China; Tea Research Center of Yunnan, Kunming 650201, China; College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Ya Wang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; Agricultural Experiment Station for Tea and Tea Processing of Yunnan, Ministry of Agriculture, Kunming 650201, China; Tea Research Center of Yunnan, Kunming 650201, China; College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Huanhuan Xu
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; Agricultural Experiment Station for Tea and Tea Processing of Yunnan, Ministry of Agriculture, Kunming 650201, China; Tea Research Center of Yunnan, Kunming 650201, China; College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Dengyang Zhang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; Agricultural Experiment Station for Tea and Tea Processing of Yunnan, Ministry of Agriculture, Kunming 650201, China; Tea Research Center of Yunnan, Kunming 650201, China; College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China.
| | - Xuanjun Wang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; Agricultural Experiment Station for Tea and Tea Processing of Yunnan, Ministry of Agriculture, Kunming 650201, China; Tea Research Center of Yunnan, Kunming 650201, China; College of Pu-er Tea, Yunnan Agricultural University, Kunming 650201, China.
| | - Jun Sheng
- Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; Agricultural Experiment Station for Tea and Tea Processing of Yunnan, Ministry of Agriculture, Kunming 650201, China; Tea Research Center of Yunnan, Kunming 650201, China.
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10
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Lin L, Yang W, Chen E, Gong Z, Luo QZ, Wei XB, Yu P. MIC gene polymorphism and haplotype diversity in Li nationality of Southern China. ACTA ACUST UNITED AC 2014; 85:45-9. [DOI: 10.1111/tan.12449] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 08/08/2014] [Accepted: 09/05/2014] [Indexed: 12/15/2022]
Affiliation(s)
- L. Lin
- Department of Immunology, College of Basic Medical Sciences; Central South University; Changsha 410078 China
| | - W. Yang
- Department of Immunology, College of Basic Medical Sciences; Central South University; Changsha 410078 China
| | - E. Chen
- Department of Immunology, College of Basic Medical Sciences; Central South University; Changsha 410078 China
| | - Z. Gong
- Department of Immunology, College of Basic Medical Sciences; Central South University; Changsha 410078 China
| | - Q. Z. Luo
- Department of Immunology, College of Basic Medical Sciences; Central South University; Changsha 410078 China
| | - X. B. Wei
- Department of Immunology, College of Basic Medical Sciences; Central South University; Changsha 410078 China
| | - P. Yu
- Department of Immunology, College of Basic Medical Sciences; Central South University; Changsha 410078 China
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11
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Chen E, Lin L, Chen CJ, Zhang XY, Luo QZ, Yu P. MIC gene polymorphism and haplotype diversity in Zhuang nationality of Southern China. Hum Immunol 2014; 75:953-9. [PMID: 25167773 DOI: 10.1016/j.humimm.2014.08.203] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 08/18/2014] [Accepted: 08/18/2014] [Indexed: 02/06/2023]
Abstract
Zhuang ethnic minority is the largest minority group in China. Here, we report for the first time the polymorphisms of MICA and MICB in a healthy Zhuang population of 209 unrelated individuals. Using polymerase chain reaction-sequence specific priming (PCR-SSP) and sequencing-based typing (PCR-SBT), 13 MICA-sequence alleles and 5 MICA-STR alleles, as well as 11 MICB alleles were detected, among which MICA(∗)010, MICA(∗)A5 and MICB(∗)005:02 were the most frequent alleles. Linkage disequilibria was investigated and the most common two-locus haplotypes were MICB(∗)005:02-MICA(∗)010 and MICB(∗)014-MICA(∗)045. These results suggest informative genetic markers for investigating origins and evolution of MHC class I region haplotypes in Zhuang population.
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Affiliation(s)
- E Chen
- Department of Immunology, College of Basic Medical Sciences, Central South University, 110 Xiangya Road, Changsha 410078, China
| | - L Lin
- Department of Immunology, College of Basic Medical Sciences, Central South University, 110 Xiangya Road, Changsha 410078, China
| | - C J Chen
- Department of Immunology, College of Basic Medical Sciences, Central South University, 110 Xiangya Road, Changsha 410078, China
| | - X Y Zhang
- Department of Microbiology, Changzhi Medical College, Changzhi 046000, China
| | - Q Z Luo
- Department of Immunology, College of Basic Medical Sciences, Central South University, 110 Xiangya Road, Changsha 410078, China
| | - P Yu
- Department of Immunology, College of Basic Medical Sciences, Central South University, 110 Xiangya Road, Changsha 410078, China.
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Zhou X, Wang J, Zou H, Ward MM, Weisman MH, Espitia MG, Xiao X, Petersdorf E, Mignot E, Martin J, Gensler LS, Scheet P, Reveille JD. MICA, a gene contributing strong susceptibility to ankylosing spondylitis. Ann Rheum Dis 2014; 73:1552-7. [PMID: 23727634 PMCID: PMC3874076 DOI: 10.1136/annrheumdis-2013-203352] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
OBJECTIVE The human major histocompatibility complex class I chain-related gene A (MICA) controls the immune process by balancing activities of natural killer cells, γδ T cells and αβ CD8 T cells, and immunosuppressive CD4 T cells. MICA is located near HLA-B on chromosome 6. Recent genomewide association studies indicate that genes most strongly linked to ankylosing spondylitis (AS) susceptibility come from the region containing HLA-B and MICA. While HLA-B27 is a well-known risk genetic marker for AS, the potential effect of linkage disequilibrium (LD) shields any associations of genes around HLA-B with AS. The aim of this study was to investigate a novel independent genetic association of MICA to AS. METHODS We examined 1543 AS patients and 1539 controls from two ethnic populations by sequencing MICA and genotyping HLA-B alleles. Initially, 1070 AS patients and 1003 controls of European ancestry were used as a discovery cohort, followed by a confirmation cohort of 473 Han Chinese AS patients and 536 controls. We performed a stratified analysis based on HLA-B27 carrier status. We also conducted logistic regression with a formal interaction term. RESULTS Sequencing of MICA identified that MICA*007:01 is a significant risk allele for AS in both Caucasian and Han Chinese populations, and that MICA*019 is a major risk allele in Chinese AS patients. Conditional analysis of MICA alleles on HLA-B27 that unshielded LD effect confirmed associations of the MICA alleles with AS. CONCLUSIONS Parallel with HLA-B27, MICA confers strong susceptibility to AS in US white and Han Chinese populations.
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Affiliation(s)
- Xiaodong Zhou
- Department of Internal Medicine, Division of Rheumatology, The University of Texas Medical School at Houston, Houston, Texas, USA
| | - Jiucun Wang
- Ministry of Education (MOE) Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, China
| | - Hejian Zou
- Department of Rheumatology, Huashan Hospital, Fudan University, Shanghai, China
| | | | - Michael H Weisman
- Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Maribel G Espitia
- Department of Internal Medicine, Division of Rheumatology, The University of Texas Medical School at Houston, Houston, Texas, USA
| | - Xiangjun Xiao
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Effie Petersdorf
- Division of Clinical Research, Fred Hutchinson Cancer Research Center, Department of Medicine and Division of Oncology, University of Washington, Seattle, Washington, USA
| | - Emmanuel Mignot
- Department of Psychiatry, Stanford University, School of Medicine, Stanford, California, USA
| | - Javier Martin
- The Instituto de Parasitologia y Biomedicina Lopez-Neyra, CSIC, Armilla, Granada, Spain
| | - Lianne S Gensler
- Division of Rheumatology, The University of California, San Francisco, USA
| | - Paul Scheet
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - John D Reveille
- Department of Internal Medicine, Division of Rheumatology, The University of Texas Medical School at Houston, Houston, Texas, USA
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Cox ST, Madrigal JA, Saudemont A. Diversity and characterization of polymorphic 5' promoter haplotypes of MICA and MICB genes. ACTA ACUST UNITED AC 2014; 84:293-303. [PMID: 24962621 DOI: 10.1111/tan.12400] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 04/25/2014] [Accepted: 05/26/2014] [Indexed: 01/07/2023]
Abstract
The major histocompatibility complex (MHC) class I-related chain A (MICA) and B (MICB) are ligands for the natural killer group 2, member D (NKG2D) activating receptor expressed on natural killer (NK) cells, natural killer T (NKT) cells, CD8+ T cells and γδ T cells. Natural killer group 2, member D (NKG2D) ligand expression is stress-related and upregulated by infected or oncogenic cells leading to cytolysis. MICA and MICB genes display considerable polymorphism among individuals and studies have investigated allelic association with disease and relevance of MICA in transplantation, with variable success. It is now known that promoters of MICA and MICB are polymorphic with some polymorphisms associating with reduced expression. We sequenced International Histocompatibility Workshop (IHW) cell line DNA to determine promoter types and alleles encoded by exons 2-6. We found 8 of 12 known MICA promoter polymorphisms and although promoter P7 dominated, other promoters associated with the same allele. For example, MICA*002:01 had promoters P3, P4 or P7 and the common MICA*008:01/04 type had P1, P6 or P7. Similarly, we sequenced 8 of 12 known MICB promoter haplotypes. Some coding region defined MICB alleles had a single promoter, for example, MICB*002:01 and promoter P9, whereas the promiscuous MICB*005 allele had promoters P1, P2, P5, P6, P10 or P12. The results indicate potential for variation in expression of MICA and MICB ligands between individuals with the same allelic types. If differential expression by polymorphic MICA and MICB promoters is confirmed by functional studies, involvement of these genes in disease susceptibility or adverse transplantation outcomes may require knowledge of both promoter and allelic types to make meaningful conclusions.
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Affiliation(s)
- S T Cox
- Anthony Nolan Research Institute, The Royal Free Hospital, London, UK
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Distribution of MICB diversity in the Zhejiang Han population: PCR sequence-based typing for exons 2–6 and identification of five novel MICB alleles. Immunogenetics 2013; 65:485-92. [DOI: 10.1007/s00251-013-0699-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 03/19/2013] [Indexed: 11/26/2022]
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15
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Abstract
A novel MICA allele, MICA*070, was defined by sequencing. The new allele differs from the MICA*008:04 sequence in exon 2, encoding a C instead of G corresponding to cDNA nucleotide position 183. This nucleotide substitution is predicted to encode serine instead of arginine at residue 38 of the α1 domain of the MICA molecule.
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Kumar N, Sharma G, Kaur G, Tandon N, Bhatnagar S, Mehra N. Major histocompatibility complex class I chain related gene-A microsatellite polymorphism shows secondary association with type 1 diabetes and celiac disease in North Indians. ACTA ACUST UNITED AC 2012; 80:356-62. [DOI: 10.1111/j.1399-0039.2012.01931.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Revised: 05/29/2012] [Accepted: 06/26/2012] [Indexed: 01/08/2023]
Affiliation(s)
- N. Kumar
- Department of Transplant Immunology and Immunogenetics; All India Institute of Medical Sciences; New Delhi; India
| | - G. Sharma
- Department of Transplant Immunology and Immunogenetics; All India Institute of Medical Sciences; New Delhi; India
| | - G. Kaur
- Department of Transplant Immunology and Immunogenetics; All India Institute of Medical Sciences; New Delhi; India
| | - N. Tandon
- Department of Endocrinology and Metabolism; All India Institute of Medical Sciences; New Delhi; India
| | - S. Bhatnagar
- Department of Paediatrics; All India Institute of Medical Sciences; New Delhi; India
| | - N. Mehra
- Department of Transplant Immunology and Immunogenetics; All India Institute of Medical Sciences; New Delhi; India
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17
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Host-pathogen interactions revealed by human genome-wide surveys. Trends Genet 2012; 28:233-43. [PMID: 22445588 DOI: 10.1016/j.tig.2012.02.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Revised: 02/02/2012] [Accepted: 02/02/2012] [Indexed: 12/21/2022]
Abstract
Genome-wide association studies (GWAS) have now convincingly shown that the diverse outcomes (such as the resolution of infection, clinical deterioration to severe disease, or progression from acute infection to persistent infection) that occur following microbial infection can be at least partly explained by human genetic variation. Unbiased whole-genome approaches have revealed unprecedentedly robust associations between genetic markers and susceptibility to disease, providing clear insights into our understanding of infectious disease biology by revealing the crucial host-pathogen interaction sites. Further work characterizing both the host causative variations and pathogenic microbial strains with distinct host interactions and disease outcomes is now required to provide potential new intervention strategies.
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del Puerto F, Nishizawa JE, Kikuchi M, Roca Y, Avilas C, Gianella A, Lora J, Velarde FUG, Miura S, Komiya N, Maemura K, Hirayama K. Protective human leucocyte antigen haplotype, HLA-DRB1*01-B*14, against chronic Chagas disease in Bolivia. PLoS Negl Trop Dis 2012; 6:e1587. [PMID: 22448298 PMCID: PMC3308929 DOI: 10.1371/journal.pntd.0001587] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Accepted: 02/11/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Chagas disease, caused by the flagellate parasite Trypanosoma cruzi affects 8-10 million people in Latin America. The mechanisms that underlie the development of complications of chronic Chagas disease, characterized primarily by pathology of the heart and digestive system, are not currently understood. To identify possible host genetic factors that may influence the clinical course of Chagas disease, Human Leucocyte Antigen (HLA) regional gene polymorphism was analyzed in patients presenting with differing clinical symptoms. METHODOLOGY Two hundred and twenty nine chronic Chagas disease patients in Santa Cruz, Bolivia, were examined by serological tests, electrocardiogram (ECG), and Barium enema colon X-ray. 31.4% of the examinees showed ECG alterations, 15.7% megacolon and 58.1% showed neither of them. A further 62 seropositive megacolon patients who had undergone colonectomy due to acute abdomen were recruited. We analyzed their HLA genetic polymorphisms (HLA-A, HLA-B, MICA, MICB, DRB1 and TNF-alpha promoter region) mainly through Sequence based and LABType SSO typing test using LUMINEX Technology. PRINCIPAL FINDINGS The frequencies of HLA-DRB1*01 and HLA-B*14:02 were significantly lower in patients suffering from megacolon as well as in those with ECG alteration and/or megacolon compared with a group of patients with indeterminate symptoms. The DRB1*0102, B*1402 and MICA*011 alleles were in strong Linkage Disequilibrium (LD), and the HLA-DRB1*01-B*14-MICA*011 haplotype was associated with resistance against chronic Chagas disease. CONCLUSIONS This is the first report of HLA haplotype association with resistance to chronic Chagas disease.
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Affiliation(s)
- Florencia del Puerto
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), and Global COE Program, Nagasaki University, Nagasaki, Japan
| | | | - Mihoko Kikuchi
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), and Global COE Program, Nagasaki University, Nagasaki, Japan
- Center for International Collaboration Research (CICORN), Nagasaki University, Nagasaki, Japan
| | - Yelin Roca
- Centro Nacional de Enfermedades Tropicales, Santa Cruz, Bolivia
| | - Cinthia Avilas
- Centro Nacional de Enfermedades Tropicales, Santa Cruz, Bolivia
| | | | - Javier Lora
- Centro Nacional de Enfermedades Tropicales, Santa Cruz, Bolivia
| | | | - Sachio Miura
- Department of Tropical Medicine and Parasitology, School of Medicine, Keio University, Tokyo, Japan
| | - Norihiro Komiya
- Department of Cardiovascular Medicine, Nagasaki University Graduate School of Biomedical Science, Nagasaki, Japan
| | - Koji Maemura
- Department of Cardiovascular Medicine, Nagasaki University Graduate School of Biomedical Science, Nagasaki, Japan
| | - Kenji Hirayama
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), and Global COE Program, Nagasaki University, Nagasaki, Japan
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19
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Association of MICA and MICB alleles with symptomatic dengue infection. Hum Immunol 2011; 72:904-7. [DOI: 10.1016/j.humimm.2011.06.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Revised: 06/16/2011] [Accepted: 06/27/2011] [Indexed: 01/29/2023]
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Howson JMM, Stevens H, Smyth DJ, Walker NM, Chandler KA, Bingley PJ, Todd JA. Evidence that HLA class I and II associations with type 1 diabetes, autoantibodies to GAD and autoantibodies to IA-2, are distinct. Diabetes 2011; 60:2635-44. [PMID: 21831970 PMCID: PMC3178284 DOI: 10.2337/db11-0131] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
OBJECTIVE A major feature of type 1 diabetes is the appearance of islet autoantibodies before diagnosis. However, although the genetics of type 1 diabetes is advanced, the genetics of islet autoantibodies needs further investigation. The primary susceptibility loci in type 1 diabetes, the HLA class I and II genes, are believed to determine the specificity and magnitude of the autoimmune response to islet antigens. We investigated the association of glutamic acid decarboxylase autoantibodies (GADA) and insulinoma-associated antigen-2 autoantibodies (IA-2A) with the HLA region. RESEARCH DESIGN AND METHODS Associations of GADA and IA-2A with HLA-DRB1, HLA-DQB1, HLA-B, HLA-C, HLA-A, MICA, and 3,779 single nucleotide polymorphisms (SNPs) were analyzed in 2,531 childhood-onset case subjects (median time since diagnosis 5 years). All analyses were adjusted for age-at-diagnosis and duration of diabetes. RESULTS GADA and IA-2A were associated with an older age-at-diagnosis (P < 10(-19)). For GADA, the primary association was with HLA-DQB1 (P = 9.00 × 10(-18)), with evidence of a second independent effect in the HLA class I region with SNP, rs9266722 (P = 2.84 × 10(-6)). HLA-DRB1 had the strongest association with IA-2A (P = 1.94 × 10(-41)), with HLA-A*24 adding to the association, albeit negatively (P = 1.21 × 10(-10)). There was no evidence of association of either IA-2A or GADA with the highly type 1 diabetes predisposing genotype, HLA-DRB1*03/04. CONCLUSIONS Despite genetic association of type 1 diabetes and the islet autoantibodies localizing to the same HLA class II genes, HLA-DRB1 and HLA-DQB1, the effects of the class II alleles and genotypes involved are quite different. Therefore, the presence of autoantibodies is unlikely to be causal, and their role in pathogenesis remains to be established.
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Affiliation(s)
- Joanna M M Howson
- Juvenile Diabetes Research Foundation/Wellcome Trust Diabetesand Inflammation Laboratory, Cambridge Institute for Medical Research, Departmentof Medical Genetics, University of Cambridge, Cambridge, U.K.
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21
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Cha CH, Sohn YH, Oh HB, Ko SY, Cho MC, Kwon OJ. MICB polymorphisms and haplotypes with MICA and HLA alleles in Koreans. ACTA ACUST UNITED AC 2011; 78:38-44. [DOI: 10.1111/j.1399-0039.2011.01694.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Fürst D, Solgi G, Recker K, Mytilineos D, Schrezenmeier H, Mytilineos J. Sequence-based typing of major histocompatibility complex class I chain-related gene A alleles by use of exons 2-5 information. ACTA ACUST UNITED AC 2011; 77:201-5. [DOI: 10.1111/j.1399-0039.2010.01601.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Albrecht JC, Lin JS, Barron AE. A 265-base DNA sequencing read by capillary electrophoresis with no separation matrix. Anal Chem 2011; 83:509-15. [PMID: 21182303 PMCID: PMC3271724 DOI: 10.1021/ac102188p] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electrophoretic DNA sequencing without a polymer matrix is currently possible only with the use of some kind of "drag-tag" as a mobility modifier. In free-solution conjugate electrophoresis (FSCE), a drag-tag attached to each DNA fragment breaks linear charge-to-friction scaling, enabling size-based separation in aqueous buffer alone. Here we report a 265-base read for free-solution DNA sequencing by capillary electrophoresis using a random-coil protein drag-tag of unprecedented length and purity. We identified certain methods of protein expression and purification that allow the production of highly monodisperse drag-tags as long as 516 amino acids, which are almost charge neutral (+1 to +6) and yet highly water-soluble. Using a four-color LIF detector, 265 bases could be read in 30 min with a 267-amino acid drag-tag, on par with the average read of current next-gen sequencing systems. New types of multichannel systems that allow much higher throughput electrophoretic sequencing should be much more accessible in the absence of a requirement for viscous separation matrix.
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Affiliation(s)
| | - Jennifer S. Lin
- Department of Bioengineering, Stanford University, Stanford, California, USA
| | - Annelise E. Barron
- Department of Chemical Engineering, Stanford University, Stanford, California, USA
- Department of Bioengineering, Stanford University, Stanford, California, USA
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24
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Vallian S, Rad MJ, Tavallaei M, Tavassoli M. Correlation of major histocompatibility complex class I related A (MICA) polymorphism with the risk of developing breast cancer. Med Oncol 2011; 29:5-9. [PMID: 21221852 DOI: 10.1007/s12032-010-9776-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2010] [Accepted: 12/07/2010] [Indexed: 11/27/2022]
Abstract
In the present study, we examined the association of different alleles of MICA gene with the risk of breast cancer development in Iranian population. Our data showed a significant relationship between longer alleles, alleles with 9- and 6-GCT repeat of MICA gene, and a higher risk of developing breast cancer according to the age of onset. The data indicated a 6-fold increase for developing breast cancer in patients carrying the allele with 6-GCT repeat after age 50 (OR = 5.8333, 95% CI: 1.2976-26/2236, P = 0.0172). In addition, patients carrying longer alleles in their genotype (6/6, 6/9, and 9/9 genotypes) were found significantly at higher risk of developing breast cancer than control individuals (OR = 5.6, P = 0.0038, 95% CI: 1.6578-18.9166). In contrast, alleles with short GCT repeat of 4 and 5.1 showed to play a role in reducing the risk of breast cancer (OR = 0.79, P = 0.3643 and 95% CI: 0.4743-1.3157). Women with allele 4 were found twofold more protected against breast cancer (OR = 0.4597, 95% CI: 0.2164-0.9765, P = 0.0401). The results suggested that women with genotypes with 9- and 6-GCT repeat alleles of MICA gene could be considered more potent to develop breast cancer especially at higher age.
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Affiliation(s)
- Sadeq Vallian
- Division of Genetics, Department of Biology, Faculty of Science, University of Isfahan, Isfahan, Iran.
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25
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Bratanic N, Smigoc Schweiger D, Mendez A, Bratina N, Battelino T, Vidan-Jeras B. An influence of HLA-A, B, DR, DQ, and MICA on the occurrence of Celiac disease in patients with type 1 diabetes. ACTA ACUST UNITED AC 2010; 76:208-15. [PMID: 20492597 DOI: 10.1111/j.1399-0039.2010.01501.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Celiac disease (CD) is more common in individuals with insulin dependent diabetes mellitus (T1D) than in the general population. HLA class II molecules DQ8 (DQB1*0302-DQA1*0301) and DQ2 (DQB1*0201-DQA1*0501) have been identified as key genetic risk factors in both diseases. While DQ8 conveys a higher risk for T1D, DQ2 is more frequent in CD. Less is known about the contribution of HLA class I. The gut immune system has been implicated in the pathogenesis of both diseases. The MICA, which is mainly expressed in the gastrointestinal epithelium and recognized by gammadeltaT lymphocytes and natural killer (NK) cells via the NKG2D, might play a role. The aim of our study was to identify possible HLA class I and MICA alleles and conserved extended haplotypes as risk factors for the development of CD in T1D. Three groups consisting of 37 individuals with T1D and CD, 67 individuals with only T1D and 70 controls were analyzed. HLA class I and MICA alleles were determined using Luminex technology. An occurrence of CD in individuals with T1D was most significantly associated with B*08 (P = 7.3 x 10(-13)), contributing more than any of the HLA class II alleles (DRB1*0301, P = 5.00 x 10(-10); DQB1*0201, P = 7.65 x 10(-8)). Moreover, the association with CD became stronger when B*08(B*08-DQA*0501-DQB1*0201-DRB1*0301, P = 5.07 x 10(-12)) was present in the DRB1*0301-DQB1*0201-DQA1*0501 (P = 5.00 x 10(-10)) extended haplotype. We suggest a combined influence of alleles present in the MICA*008-B*08-A1-DR3-DQ2 extended haplotype on the development of CD in Slovenian individuals with T1D, where B*08 or/and a gene located close to it may play an important role, independently of HLA class II.
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Affiliation(s)
- N Bratanic
- Department of Pediatric Endocrinology, Diabetes and Metabolic Diseases, University Children's Hospital, UMC, Ljubljana, Slovenia
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Raha O, Chowdhury S, Dasgupta S, Raychaudhuri P, Sarkar BN, Raju PV, Rao VR. Approaches in type 1 diabetes research: A status report. Int J Diabetes Dev Ctries 2010; 29:85-101. [PMID: 20142874 PMCID: PMC2812756 DOI: 10.4103/0973-3930.53126] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2008] [Accepted: 05/29/2009] [Indexed: 12/18/2022] Open
Abstract
Type 1 diabetes is a multifactorial disease with an early age of onset, in which the insulin producing beta cell of the pancreas are destroyed because of autoimmunity. It is the second most common chronic disease in children and account for 5% to 10% of all diagnosed cases of diabetes. India is having an incidence of 10.6 cases/year/100,000, and recent studies indicate that the prevalence of type 1 diabetes in India is increasing. However in view of poor health care network, there is no monitoring system in the country. Of the 18 genomic intervals implicated for the risk to develop type 1 diabetes, the major histocompatibility complex (MHC) region on chromosome 6p21.31 has been the major contributor estimated to account for 40-50%, followed by 10% frequency of INS-VNTR at 5' flanking region of the insulin gene on chromosome 11p15.5. However, population studies suggest that > 95% of type 1 diabetes have HLA-DR3 or DR4, or both, and in family studies, sibling pairs affected with type 1 diabetes have a non-random distribution of shared HLA haplotypes. As predisposing genetic factors such as HLA alleles are known, immunological interventions to prevent type 1 diabetes are of great interest. In the present study we have reviewed the status of molecular genetics of the disease and the approaches that need to be adopted in terms of developing patient and suitable control cohorts in the country.
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Affiliation(s)
- Oindrila Raha
- Anthropological Survey of India, 27-Jawaharlal Nehru Road, Kolkata, West-Bengal - 700 016, India
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Flodström-Tullberg M, Bryceson YT, Shi FD, Höglund P, Ljunggren HG. Natural killer cells in human autoimmunity. Curr Opin Immunol 2009; 21:634-40. [PMID: 19892538 DOI: 10.1016/j.coi.2009.09.012] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2009] [Revised: 09/23/2009] [Accepted: 09/23/2009] [Indexed: 12/11/2022]
Abstract
Natural killer (NK) cells are innate immune cells. Although NK cells are best characterized for their ability to control tumors and infections, recent data have indicated that they also are important regulatory cells by virtue of interactions with many types of immune and nonimmune cells. Thereby, they can affect the outcome of adaptive immune responses and maintain immune homeostasis. Thus, NK cells can either exacerbate or limit immune responses, including those to autoantigens. Here, we discuss current insights into the role of NK cells in human autoimmunity.
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Affiliation(s)
- Malin Flodström-Tullberg
- Center for Infectious Medicine, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, 141 86 Stockholm, Sweden
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Husebye ES, Løvås K. Immunology of Addison's disease and premature ovarian failure. Endocrinol Metab Clin North Am 2009; 38:389-405, ix. [PMID: 19328418 DOI: 10.1016/j.ecl.2009.01.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Autoimmune Addison's disease and autoimmune ovarian insufficiency are caused by selective targeting by T and B lymphocytes to the steroidogenic apparatus in these organs. Autoantibodies toward 21-hydroxylase are a clinically useful marker for autoimmune Addison's disease. Autoantibodies to 21-hydroxylase are found in premature ovarian insufficiency, but others also can be present, notably antibodies against side-chain cleavage enzyme. The autoimmune response primarily targets the theca cells, yielding elevated concentrations of inhibin, which is emerging as a useful diagnostic marker for autoimmune etiology of ovarian insufficiency. Little is known about its immunogenetics, but in contrast to Addison's disease, several experimental models of autoimmune premature ovarian insufficiency are available for study.
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Affiliation(s)
- Eystein S Husebye
- Section of Endocrinology, Institute of Medicine, University of Bergen, Bergen, Norway.
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Abstract
Autoimmune Addison's disease is caused by autoreactivity towards the adrenal cortex involving 21-hydroxylase autoantibodies and autoreactive T cells. Autoimmune destruction of the adrenal cortex is triggered by hitherto unknown environmental factors in individuals with genetic susceptibility. Several genes have been identified, of which the major histocompatibility complex haplotypes DR3-DQ2 and DR4-DQ8 are most strongly associated. In addition, other genes also implicated in other autoimmune diseases are linked to Addison's disease, such as cytotoxic T lymphocyte antigen 4 (CTLA-4), protein tyrosine phosphatase non-receptor type 22 (PTPN22), major histocompatibility complex class II transactivator (CIITA), and most recently the C-lectin type gene (CLEC16A). Studies employing T cells in humans and animal models, and the collection of large patient cohorts facilitating genome-wide screening projects, will hopefully improve the understanding of the pathogenesis of the disease in the near future.
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Affiliation(s)
- Eystein Husebye
- Department of Medicine, Haukeland University Hospital, Section of Endocrinology, Institute of Medicine, University of Bergen, Bergen, Norway.
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