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De Deo D, Dal Buono A, Gabbiadini R, Spaggiari P, Busacca A, Masoni B, Ferretti S, Bezzio C, Armuzzi A. Management of proctitis in ulcerative colitis and the place of biological therapies. Expert Opin Biol Ther 2024; 24:443-453. [PMID: 38874980 DOI: 10.1080/14712598.2024.2369189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Accepted: 06/13/2024] [Indexed: 06/15/2024]
Abstract
INTRODUCTION Approximately 20-30% of the patients with ulcerative colitis (UC) may present with isolated proctitis. Ulcerative proctitis (UP) is a challenging condition to manage due to its significant burden in terms of disabling symptoms. AREAS COVERED PubMed was searched up to March 2024 to identify relevant studies on UP. A comprehensive summary and critical appraisal of the available data on UP are provided, highlighting emerging treatments and areas for future research. EXPERT OPINION Patients with UP are often undertreated, and the disease burden is often underestimated in clinical practice. Treat-to-target management algorithms can be applied to UP, aiming for clinical remission in the short term, and endoscopic remission and maintenance of remission in the long term. During their disease, approximately one-third of UP patients require advanced therapies. Escalation to biologic therapy is required for refractory or steroid dependent UP. For optimal patient care and management of UP, it is necessary to include these patients in future randomized clinical trials.
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Affiliation(s)
- Diletta De Deo
- IBD Center, Humanitas Research Hospital - IRCCS, Rozzano, Milan, Italy
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
| | - Arianna Dal Buono
- IBD Center, Humanitas Research Hospital - IRCCS, Rozzano, Milan, Italy
| | | | - Paola Spaggiari
- Department of Pathology, Humanitas Research Hospital, Rozzano Milan, Italy
| | - Anita Busacca
- IBD Center, Humanitas Research Hospital - IRCCS, Rozzano, Milan, Italy
| | - Benedetta Masoni
- IBD Center, Humanitas Research Hospital - IRCCS, Rozzano, Milan, Italy
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
| | - Silvia Ferretti
- IBD Center, Humanitas Research Hospital - IRCCS, Rozzano, Milan, Italy
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
| | - Cristina Bezzio
- IBD Center, Humanitas Research Hospital - IRCCS, Rozzano, Milan, Italy
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
| | - Alessandro Armuzzi
- IBD Center, Humanitas Research Hospital - IRCCS, Rozzano, Milan, Italy
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
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Anthofer M, Windisch M, Haller R, Ehmann S, Wrighton S, Miller M, Schernthanner L, Kufferath I, Schauer S, Jelušić B, Kienesberger S, Zechner EL, Posselt G, Vales-Gomez M, Reyburn HT, Gorkiewicz G. Immune evasion by proteolytic shedding of natural killer group 2, member D ligands in Helicobacter pylori infection. Front Immunol 2024; 15:1282680. [PMID: 38318189 PMCID: PMC10839011 DOI: 10.3389/fimmu.2024.1282680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 01/02/2024] [Indexed: 02/07/2024] Open
Abstract
Background Helicobacter pylori (H. pylori) uses various strategies that attenuate mucosal immunity to ensure its persistence in the stomach. We recently found evidence that H. pylori might modulate the natural killer group 2, member 2 (NKG2D) system. The NKG2D receptor and its ligands are a major activation system of natural killer and cytotoxic T cells, which are important for mucosal immunity and tumor immunosurveillance. The NKG2D system allows recognition and elimination of infected and transformed cells, however viruses and cancers often subvert its activation. Here we aimed to identify a potential evasion of the NKG2D system in H. pylori infection. Methods We analyzed expression of NKG2D system genes in gastric tissues of H. pylori gastritis and gastric cancer patients, and performed cell-culture based infection experiments using H. pylori isogenic mutants and epithelial and NK cell lines. Results In biopsies of H. pylori gastritis patients, NKG2D receptor expression was reduced while NKG2D ligands accumulated in the lamina propria, suggesting NKG2D evasion. In vitro, H. pylori induced the transcription and proteolytic shedding of NKG2D ligands in stomach epithelial cells, and these effects were associated with specific H. pylori virulence factors. The H. pylori-driven release of soluble NKG2D ligands reduced the immunogenic visibility of infected cells and attenuated the cytotoxic activity of effector immune cells, specifically the anti-tumor activity of NK cells. Conclusion H. pylori manipulates the NKG2D system. This so far unrecognized strategy of immune evasion by H. pylori could potentially facilitate chronic bacterial persistence and might also promote stomach cancer development by allowing transformed cells to escape immune recognition and grow unimpeded to overt malignancy.
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Affiliation(s)
- Margit Anthofer
- Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Markus Windisch
- Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Rosa Haller
- Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Sandra Ehmann
- Institute of Pathology, Medical University of Graz, Graz, Austria
| | | | - Michael Miller
- Institute of Pathology, Medical University of Graz, Graz, Austria
| | | | - Iris Kufferath
- Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Silvia Schauer
- Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Barbara Jelušić
- Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Sabine Kienesberger
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
- Interuniversity Cooperation, BioTechMed-Graz, Graz, Austria
| | - Ellen L. Zechner
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
- Interuniversity Cooperation, BioTechMed-Graz, Graz, Austria
| | - Gernot Posselt
- Department of Biosciences and Medical Biology, Paris Lodron University of Salzburg, Salzburg, Austria
| | - Mar Vales-Gomez
- Department of Immunology and Oncology, Spanish National Centre for Biotechnology, Madrid, Spain
| | - Hugh T. Reyburn
- Department of Immunology and Oncology, Spanish National Centre for Biotechnology, Madrid, Spain
| | - Gregor Gorkiewicz
- Institute of Pathology, Medical University of Graz, Graz, Austria
- Interuniversity Cooperation, BioTechMed-Graz, Graz, Austria
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Hao Y, Yzet C, McBride RB, Stock A, Tiratterra E, D'Errico A, Belluzzi A, Scaioli E, Gionchetti P, Roda G, Ungaro R, Colombel JF, Harpaz N, Ko HM. Baseline Histological Findings Do Not Predict the Risk of Subsequent Extension in Patients with Limited Ulcerative Colitis. Dig Dis Sci 2022; 67:1311-1319. [PMID: 33934255 DOI: 10.1007/s10620-021-06970-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 03/24/2021] [Indexed: 12/09/2022]
Abstract
BACKGROUND Among patients with limited ulcerative colitis (UC), 30% ultimately extend to pancolitis and are at increased risk of adverse clinical outcomes. Risk of endoscopic extension has been found to correlate with clinical features such as early age of onset. AIMS We sought to determine whether histologic features correlate with disease extension. METHODS The study population consisted of 40 patients with UC from two large academic centers diagnosed between 2006 and 2017. Eligible cases had a diagnosis of endoscopically limited UC (Montreal E1 or E2) at baseline and ≥ 2 subsequent endoscopic examinations with biopsies. Severity of inflammation was scored using both the Mount Sinai Activity Index and Nancy Histological Index. RESULTS Patients were divided into two cohorts: those who progressed to pancolitis (Montreal E3) were defined as "Extenders" (n = 21), whereas "Non-extenders" (n = 19) were cases without progression in the follow-up period. The median follow-up time was 58.4 months. The histologic scores in the endoscopically involved mucosa of the index biopsies were not associated with subsequent extension of disease, overall. However, among extender cohort, the index histology scores correlated with biopsy scores at extension (r = 0.455, P = 0.044) and index severity was associated with a shorter time to extension (r = - 0.611, P = 0.003). Furthermore, female patients had a shorter time to extension (P = 0.013). CONCLUSIONS Histological severity of limited UC is not an independent predictor of extension in UC. However, among patients who subsequently extend, severe inflammation at baseline correlates with shorter progression time and severe inflammation when extension occurs. Patients with limited UC but severe histologic inflammation may warrant more frequent endoscopic surveillance.
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Affiliation(s)
- Yansheng Hao
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Clara Yzet
- Department of Gastroenterology, Amiens University Hospital, Picardie University, Amiens, France
| | - Russell B McBride
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Aryeh Stock
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Elisa Tiratterra
- Department of Medical and Surgical Sciences (DIMEC), Gastroenterology and Endoscopy Unit, Sant'Orsola University Hospital, University of Bologna, Bologna, Italy
| | - Antonietta D'Errico
- 'F Addarii'' Institute of Oncology and Transplantation Pathology, Sant'Orsola Hospital, University of Bologna, Bologna, Italy
| | - Andrea Belluzzi
- Department of Medical and Surgical Sciences, St. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Eleonora Scaioli
- Department of Medical and Surgical Sciences, St. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Paolo Gionchetti
- Department of Medical and Surgical Sciences, St. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Giulia Roda
- Inflammatory Bowel Disease Center, Department of Gastroenterology, Humanitas Clinical and Research Center -IRCCS, Milan, Italy
| | - Ryan Ungaro
- Department of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jean-Frederic Colombel
- Department of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Noam Harpaz
- Departments of Pathology and Medicine (Gastroenterology), Icahn School of Medicine At Mount Sinai, New York, NY, USA
| | - Huaibin Mabel Ko
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, USA.
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Choi YS, Kim WJ, Kim JK, Kim DS, Lee DH. Efficacy of topical 5-aminosalicylate monotherapy in patients with ulcerative proctitis with skip inflammation. J Gastroenterol Hepatol 2018; 33:1200-1206. [PMID: 29205498 DOI: 10.1111/jgh.14052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 11/10/2017] [Accepted: 11/15/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND AIM In some patients with ulcerative proctitis (UP), skip inflammation is noted in the right side of the colon, but little is known about its clinical course. The aim of this study was to evaluate the clinical course of UP with skip inflammation and the efficacy of topical 5-aminosalicylate (5-ASA) monotherapy. METHODS This study reviewed the data of 388 patients with an initial diagnosis of UP from January 2005 to October 2015. This study matched each UP patient with skip inflammation 1:2 with controls who had UP without skip inflammation; to reduce bias, this study matched the controls with the cases by age, gender, and initial disease activity. RESULTS During the follow-up period (median: 69.5 months), the overall progression rates for the control group (n = 192) and the skip inflammation group (n = 96) were 24.0% and 32.9% at 10 years, respectively (log-rank P = 0.71). In the skip inflammation group, the progression rates were not significantly different between the 5-ASA combination group and the topical group, 33.4% and 26.6% at 10 years, respectively (log-rank P = 0.96). The overall acute exacerbation rates for the control and skip inflammation groups were 17.2% and 26.8% at 10 years, respectively (log-rank P = 0.68). In the skip inflammation group, the exacerbation rates were also not significantly different between the combination and topical treatment groups, 26.6% and 23.6% at 10 years, respectively (log-rank P = 0.88). CONCLUSION The clinical course of UP with skip inflammation was not different from that of typical UP, and topical 5-ASA monotherapy for maintaining remission was as effective as 5-ASA combination therapy irrespective of the presence of skip lesions.
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Affiliation(s)
- Yong Sung Choi
- Department of Gastroenterology, Daehang Hospital, Seoul, Korea
| | - Wan Jung Kim
- Department of Gastroenterology, Daehang Hospital, Seoul, Korea
| | - Jong Kyu Kim
- Department of Gastroenterology, Daehang Hospital, Seoul, Korea
| | - Do Sun Kim
- Department of Surgery, Daehang Hospital, Seoul, Korea
| | - Doo Han Lee
- Department of Surgery, Daehang Hospital, Seoul, Korea
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Roda G, Narula N, Pinotti R, Skamnelos A, Katsanos KH, Ungaro R, Burisch J, Torres J, Colombel JF. Systematic review with meta-analysis: proximal disease extension in limited ulcerative colitis. Aliment Pharmacol Ther 2017; 45:1481-1492. [PMID: 28449361 PMCID: PMC6350510 DOI: 10.1111/apt.14063] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 12/22/2016] [Accepted: 03/06/2017] [Indexed: 12/16/2022]
Abstract
BACKGROUND Disease extent in ulcerative colitis is one of the major factors determining prognosis over the long-term. Disease extent is dynamic and a proportion of patients presenting with limited disease progress to more extensive forms of disease over time. AIM To perform a systematic review and meta-analysis of epidemiological studies reporting on extension of ulcerative colitis to determine frequency of disease extension in patients with limited ulcerative colitis at diagnosis. METHODS We performed a systematic literature search to identify studies on disease extension of ulcerative colitis (UC) and predictors of disease progression. RESULTS Overall, 41 studies were eligible for systematic review but only 30 for meta-analysis. The overall pooled frequency of UC extension was 22.8% with colonic extension being 17.8% at 5 years and 31% at 10 years. Extension was 17.8% (95% CI 11.2-27.3) from E1 to E3, 27.5% (95% CI 7.6-45.6) from E2 to E3 and 20.8% (95% CI 11.4-26.8) from E1 to E2. Rate of extension was significantly higher in patients younger than 18 years (29.2% (CI 6.4-71.3) compared to older patients (20.2% (CI 13.0-30.1) (P<.0001). Risk of extension was significantly higher in patients from North America (37.8%) than from Europe (19.6%) (P<.0001). CONCLUSIONS In this meta-analysis, approximately one quarter of patients with limited UC extend over time with most extension occurring during the first 10 years. Rate of extension depends on age at diagnosis and geographic origin. Predicting those at high risk of disease extension from diagnosis could lead to personalised therapeutic strategies.
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Affiliation(s)
- G Roda
- The Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - N Narula
- Division of Gastroenterology, Department of Medicine and Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, ON, Canada
| | - R Pinotti
- Gustave L. and Janet W. Levy Library, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - A Skamnelos
- Division of Gastroenterology, School of Health Sciences, University of Ioannina, Ioannina, Greece
| | - K H Katsanos
- Division of Gastroenterology, School of Health Sciences, University of Ioannina, Ioannina, Greece
| | - R Ungaro
- The Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - J Burisch
- The Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - J Torres
- The Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - J-F Colombel
- The Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Gut Mesenchymal Stromal Cells in Immunity. Stem Cells Int 2017; 2017:8482326. [PMID: 28337224 PMCID: PMC5350335 DOI: 10.1155/2017/8482326] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 01/30/2017] [Accepted: 02/05/2017] [Indexed: 12/18/2022] Open
Abstract
Mesenchymal stromal cells (MSCs), first found in bone marrow (BM), are the structural architects of all organs, participating in most biological functions. MSCs possess tissue-specific signatures that allow their discrimination according to their origin and location. Among their multiple functions, MSCs closely interact with immune cells, orchestrating their activity to maintain overall homeostasis. The phenotype of tissue MSCs residing in the bowel overlaps with myofibroblasts, lining the bottom walls of intestinal crypts (pericryptal) or interspersed within intestinal submucosa (intercryptal). In Crohn's disease, intestinal MSCs are tightly stacked in a chronic inflammatory milieu, which causes their enforced expression of Class II major histocompatibility complex (MHC). The absence of Class II MHC is a hallmark for immune-modulator and tolerogenic properties of normal MSCs and, vice versa, the expression of HLA-DR is peculiar to antigen presenting cells, that is, immune-activator cells. Interferon gamma (IFNγ) is responsible for induction of Class II MHC expression on intestinal MSCs. The reversal of myofibroblasts/MSCs from an immune-modulator to an activator phenotype in Crohn's disease results in the formation of a fibrotic tube subverting the intestinal structure. Epithelial metaplastic areas in this context can progress to dysplasia and cancer.
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Martinez-Chamorro A, Moreno A, Gómez-García M, Cabello MJ, Martin J, Lopez-Nevot MÁ. MICA*A4 protects against ulcerative colitis, whereas MICA*A5.1 is associated with abscess formation and age of onset. Clin Exp Immunol 2016; 184:323-31. [PMID: 26940143 DOI: 10.1111/cei.12786] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/01/2016] [Indexed: 12/15/2022] Open
Abstract
Ulcerative colitis (UC) is one of the two major forms of inflammatory bowel disease, the aetiology of which remains unknown. Several studies have demonstrated the genetic basis of disease, identifying more than 130 susceptibility loci. The major histocompatibility complex class I chain-related gene A (MICA) is a useful candidate to be involved in UC pathogenesis, because it could be important in recognizing the integrity of the epithelial cell and its response to stress. The aim of this study was to analyse the relationship between polymorphisms in the transmembrane domain of MICA and susceptibility to develop UC. A total of 340 patients with UC and 636 healthy controls were genotyped for MICA transmembrane polymorphism using a polymerase chain reaction (PCR) combined with fluorescent technology. Different MICA alleles were determined depending on the PCR product size. The allele MICA*A4 was less frequent in patients than in controls (P = 0·003; OR = 0·643), and this protective role is higher when it forms haplotype with B*27 (P = 0·002; OR = 0·294). The haplotype HLA-B*52/MICA*A6 was also associated with UC [P = 0·001; odds ratio (OR) = 2·914]. No other alleles, genotypes or haplotypes were related with UC risk. Moreover, MICA*A5.1 is associated independently with abscesses (P = 0·002; OR = 3·096) and its frequency is lower in patients diagnosed between ages 17 and 40 years (P = 0·007; OR = 0·633), meaning an extreme age on onset. No association with location, extra-intestinal manifestations or need for surgery was found.
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Affiliation(s)
| | - A Moreno
- Section of Immunology, Hospital Virgen de las Nieves
| | | | - M J Cabello
- Digestive Section, Hospital Virgen de las Nieves
| | - J Martin
- Institute of Parasitology and Biomedicine López-Neyra, CSIC, Granada, Spain
| | - M Á Lopez-Nevot
- Section of Immunology, Hospital Virgen de las Nieves.,University of Granada
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Wang Q, Zhou X. Associations of MICA Polymorphisms with Inflammatory Rheumatic Diseases. Open Rheumatol J 2015; 9:94-100. [PMID: 26862354 PMCID: PMC4740962 DOI: 10.2174/1874312901409010094] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 08/27/2015] [Accepted: 08/28/2015] [Indexed: 01/01/2023] Open
Abstract
Inflammatory rheumatic diseases are characterized by inflammation resulting from the immune dysregulation that usually attacks joints, skin and internal organs. Many of them are considered as complex disease that may be predisposed by multiple genes and/or genetic loci, and triggered by environmental factors such as microbiome and cellular stress. The major histocompatibility complex class I chain-related gene A (MICA) is a highly polymorphic gene that encodes protein variants expressed under cellular stress conditions, and these MICA variants play important roles in immune activation and surveillance. Recently, accumulating evidences from both genetic and functional studies have suggested that MICA polymorphisms may be associated with various rheumatic diseases, and the expression of MICA variants may attribute to the altered immune responses in the diseases. The objective of this review is to discuss potential genetic associations and pathological relevance of MICA in inflammatory rheumatic diseases that may help us to understand pathogenesis contributing to the development of these diseases.
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Affiliation(s)
- Qingwen Wang
- Department of Rheumatism and Immunology, Peking University Shenzhen Hospital, China
| | - Xiaodong Zhou
- Department of Internal Medicine, The University of Texas Health Science Center at Houston, USA
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Kim B, Park SJ, Hong SP, Kim TI, Kim WH, Cheon JH. Proximal disease extension and related predicting factors in ulcerative proctitis. Scand J Gastroenterol 2014; 49:177-83. [PMID: 24325564 DOI: 10.3109/00365521.2013.867360] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Ulcerative colitis usually involves the rectum, may extend in a proximal and continuous fashion to involve varying portions of the bowel. However, the risk factors predictive of proximal extension have yet to be determined. The aim of this study was to evaluate both the natural course of disease and the risk factors influencing the proximal disease extension in ulcerative proctitis. MATERIAL AND METHODS We retrospectively analyzed 98 patients with ulcerative proctitis at the time of diagnosis who were regularly followed and underwent sigmoidoscopy or colonoscopy between January 2000 and December 2007. RESULTS The mean duration of follow-up was 109.2 ± 49.5 months. A total of 27 (27.6%) patients experienced proximal disease extension. Mayo scores were significantly higher in the extension group compared with patients whose ulcerative proctitis did not extend proximally (p < 0.001). Corticosteroid use at initial diagnosis was also more frequent in the extension group (p = 0.026). In addition, chronic, continuous disease activation within 6 months of the initial diagnosis was significantly higher in the extension group (p < 0.001), as was disease relapse and the number of hospitalizations over the entire follow-up period (p < 0.001 and p = 0.002). According to multivariate analysis, disease extension after the initial diagnosis was associated with chronic disease activation, disease relapse and hospitalization (p = 0.030, p = 0.042 and p = 0.044, respectively). CONCLUSION Increased severity of disease upon diagnosis of ulcerative proctitis was associated with a higher probability of proximal disease extension during the follow-up period. Moreover, those with disease extension were more likely to experience relapse and to be hospitalized, indicating poor prognosis.
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Affiliation(s)
- Bun Kim
- Department of Internal Medicine and Institute of Gastroenterology, Yonsei University College of Medicine , Seoul , Korea
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Kamoun A, Bouzid D, Mahfoudh N, Amouri A, Gaddour L, Hakim F, Tahri N, Masmoudi H, Makni H. Association study of MICA-TM polymorphism with inflammatory bowel disease in the South Tunisian population. Genet Test Mol Biomarkers 2013; 17:615-9. [PMID: 23822824 DOI: 10.1089/gtmb.2012.0423] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Crohn's disease (CD) and ulcerative colitis (UC) are chronic inflammatory disorders of the gastro-intestinal tract with unknown etiology. Both environmental and genetic factors are involved in the pathogenesis of these inflammatory bowel diseases (IBD). AIM The purpose of the present study was to determine the association between the polymorphism of the transmembrane region of MICA (MICA-TM), and the genetic susceptibility in Tunisian patients with IBD. PATIENTS AND METHODS A total of 102 Tunisian patients (66 with UC, 36 with CD) and 123 healthy controls were enrolled in our study. MICA-TM was genotyped by a semiautomatic fluorescent-labelled PCR method, amplicons were analysed on an ABI Prism 310 genotyper. Comparisons of allele frequencies between patients and controls, and between patients' subgroups were performed using SPSS 13.0. RESULTS No MICA allele was significantly increased in both groups of IBD compared to controls. The MICA-A5.1 allele was significantly decreased in CD patients (p=0.006, pc=0.03). In UC, MICA-A6 was associated with the presence of extraintestinal manifestations (p=0.04, pc=0.2), whereas MICA-A5 was associated with late age of onset (p=0.04). In CD, MICA-A6 was significantly increased in active disease patients when compared to moderately active or inactive disease (p=0.03, pc=0.15). CONCLUSION Some clinical features of CD and UC may be influenced by specific MICA-TM alleles. In our South Tunisian population, MICA plays a disease modifying role, rather than being an important gene in the susceptibility for developing IBD.
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Affiliation(s)
- Arwa Kamoun
- Immunology Department, Hédi Chaker Hospital, Sfax 3029, Tunisia.
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MICA-STR A.4 is associated with slower hearing loss progression in patients with Ménière's disease. Otol Neurotol 2012; 33:223-9. [PMID: 22222578 DOI: 10.1097/mao.0b013e31824296c8] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
HYPOTHESIS Immune response may influence hearing outcome in Ménière's disease (MD). BACKGROUND Major histocompatibility complex class I chain-related A (MICA) encodes a highly polymorphic stress-inducible protein, which interacts with NKGD2 receptor on the surface of NK, γδ T cells and T CD8 lymphocytes. We investigated the association of MICA gene with hearing outcome in MD and its linkage disequilibrium (LD) with human leukocyte antigen (HLA)-B. METHODS MICA short tandem repeat polymorphism (MICA-STR) was genotyped using a polymerase chain reaction-based method in a total of 302 Spanish patients with MD and 420 healthy controls. Genotyping of HLA-B was performed using polymerase chain reaction and detected with reverse sequence-specific oligonucleotide probe system in 292 patients and 1,014 controls. RESULTS Hearing loss was associated with the duration of MD (p = 0.001). We found that MICA*A5 alelle was significantly associated in the Mediterranean set (Pc = 0.04, odds ratio = 0.51 [95% confidence interval, 0.30-0.84]), but this finding was not replicated in the Galicia population. However, median time to develop hearing loss greater than 40 dB was 16 years (95% confidence interval, 9-23) for patients with the MICA*A.4 allele and 10 years (95% confidence interval, 9-11) for patients with another MICA-STR allele (log-rank test, p = 0.0038). We did not find statistical differences in the distribution of B locus between the MD and the control group. In the LD analysis, MICA*A5.1-HLA-B*07 (8.8%), MICA*A6-HLA-B*44 (8.3%), and MICA*A6-HLA-B*51 (8.3%) were the most common haplotypes, and the stronger LD was found for haplotypes MICA*A.4-HLA-B*18 (r2 = 0.41) and MICA*A.4-HLA-B*27(r2 = 0.29). CONCLUSION The allelic variant MICA*A.4 is significantly associated with slower progression of hearing loss in patients with MD. This suggests that the immune response influence hearing level in MD.
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Folwaczny M, Henninger M, Glas J. Impact of MICA-TM, MICB-C1_2_A and C1_4_1 microsatellite polymorphisms on the susceptibility to chronic periodontitis in Germany. ACTA ACUST UNITED AC 2011; 77:298-304. [DOI: 10.1111/j.1399-0039.2010.01627.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Li Y, Xia B, Lü M, Ge L, Zhang X. MICB0106 gene polymorphism is associated with ulcerative colitis in central China. Int J Colorectal Dis 2010; 25:153-9. [PMID: 19662431 PMCID: PMC2803256 DOI: 10.1007/s00384-009-0787-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/22/2009] [Indexed: 02/04/2023]
Abstract
BACKGROUND The highly polymorphic nonclassical MHC class I chain-related genes A and B (MICA and MICB) encode stress-inducible glycoproteins expressed on various epithelial cells including intestinal epithelial cells. MICA and MICB gene polymorphisms and expressions are associated with autoimmune diseases but not known in ulcerative colitis (UC). AIMS To investigate the association of MICB exon 2-4 polymorphisms and soluble MICA (sMICA) expression with the susceptibility of UC in central China. MATERIALS AND METHODS Genomic DNA was isolated from peripheral blood. The allele frequencies of MICB exon 2-4 were genotyped in 105 UC patients and 213 healthy controls by PCR single-stranded conformation polymorphism method. Thirty-two patients and 32 controls were selected for determining serum sMICA expression by ELISA. RESULTS Allele frequency of MICB0106 was significantly higher in UC patients than in healthy controls (19.0% vs. 8.9%, corrected P (Pc) = 0.0006), especially in patients with extensive colitis (24.4% vs. 8.9%, Pc = 0.0006), moderate and severe disease (24.1% vs. 8.9%, Pc = 0.0006), extraintestinal manifestations (20.5% vs. 8.9%, Pc = 0.012), male patients (22.1% vs. 8.0%, Pc = 0.006), and patients over the age of 40 years (28.8% vs. 8.3%, Pc = 0.0006). The sMICA level was significantly higher in UC than in healthy controls (604.41 +/- 480.43 pg/ml vs. 175.37 +/- 28.31 pg/ml, P = 0.0001) but not associated with the MICB0106 genotypes. CONCLUSIONS Overall, MICB0106 allele was positively associated with UC in the Han Chinese in central China. sMICA was highly expressed in UC but not associated with the MICB0106 genotype.
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Affiliation(s)
- Yi Li
- Department of Gastroenterology and Research Center of Digestive Diseases, Zhongnan Hospital, Wuhan University School of Medicine, Wuhan, People’s Republic of China ,Clinical Research Center for Intestinal and Colorectal Diseases and Key Laboratory of Allergy and Immune-related Diseases of Hubei Province, Wuhan, People’s Republic of China ,Department of Gastroenterology and Hepatology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Bing Xia
- Department of Gastroenterology and Research Center of Digestive Diseases, Zhongnan Hospital, Wuhan University School of Medicine, Wuhan, People’s Republic of China ,Clinical Research Center for Intestinal and Colorectal Diseases and Key Laboratory of Allergy and Immune-related Diseases of Hubei Province, Wuhan, People’s Republic of China ,Department of Gastroenterology, Wuhan University Zhongnan Hospital, Donghu Road 169, Wuhan, 430071, Hubei Province People’s Republic of China
| | - Min Lü
- Department of Gastroenterology and Research Center of Digestive Diseases, Zhongnan Hospital, Wuhan University School of Medicine, Wuhan, People’s Republic of China ,Clinical Research Center for Intestinal and Colorectal Diseases and Key Laboratory of Allergy and Immune-related Diseases of Hubei Province, Wuhan, People’s Republic of China
| | - Liuqing Ge
- Department of Gastroenterology and Research Center of Digestive Diseases, Zhongnan Hospital, Wuhan University School of Medicine, Wuhan, People’s Republic of China ,Clinical Research Center for Intestinal and Colorectal Diseases and Key Laboratory of Allergy and Immune-related Diseases of Hubei Province, Wuhan, People’s Republic of China
| | - Xiaolian Zhang
- Clinical Research Center for Intestinal and Colorectal Diseases and Key Laboratory of Allergy and Immune-related Diseases of Hubei Province, Wuhan, People’s Republic of China
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Lavado-Valenzuela R, Benavides M, Carabantes F, Alonso A, Caballero A. MHC class I chain-related gene A transmembrane polymorphism in Spanish women with breast cancer. ACTA ACUST UNITED AC 2009; 74:46-9. [DOI: 10.1111/j.1399-0039.2009.01254.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lü M, Xia B, Ge L, Li Y, Zhao J, Chen F, Zhou F, Zhang X, Tan J. Role of major histocompatibility complex class I-related molecules A*A5.1 allele in ulcerative colitis in Chinese patients. Immunology 2008; 128:e230-6. [PMID: 19016911 DOI: 10.1111/j.1365-2567.2008.02953.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The major histocompatibility complex (MHC) class I-related molecules A (MICA) is a stress-inducible cell surface antigen that is recognized by intestinal epithelial Vdelta1 gammadelta T cells, natural killer (NK) cells and CD8(+) T cells with NKG2D receptor participating in the immunological reaction in the intestinal mucosa. The present study aimed to investigate the functions of the MICA*A5.1 allele in the development of ulcerative colitis (UC) in the Chinese population. The microsatellite polymorphisms of MICA were genotyped in 124 unrelated Chinese patients with UC and 172 ethnically matched healthy controls using a semiautomatic fluorescently labelled polymerase chain reaction. MICA*A5.1-expressing Raji cells were generated by gene transfection. Cytotoxicity of NK cells to Raji cells expressing different MICA molecules was detected using the lactate dehydrogenase method. Soluble MICA in the culture supernatant was detected by enzyme-linked immunosorbent assay. The frequency of MICA*A5.1 was significantly higher in UC patients compared with the healthy controls (29.0% versus 17.4%, P = 0.001, corrected P = 0.005, OR = 1.936, 95% CI 1.310-2.863) and the frequency of a MICA*A5.1/A5.1 homozygous genotype was increased in UC patients (18.5% versus 7% in healthy controls, P = 0.0032, corrected P = 0.048, OR = 3.036, 95% CI 1.447-6.372). Raji cells with MICA*A5.1 expression produced more soluble MICA (t = 5.75, P < 0.01) than Raji cells with full-length MICA expression in culture supernatant. Raji cells with MICA*A5.1 expression were more resistant to killing by NK cells than Raji cells with full-length MICA expression. The MICA*A5.1 allele and MICA*A5.1/A5.1 genotype are significantly associated with Chinese UC patients in central China. MICA*A5.1 may play a role in the development of UC by producing more soluble MICA and resistance to NK cells.
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Affiliation(s)
- Min Lü
- Internal Medicine Department, Peking University School of Oncology, Beijing Cancer Hospital & Institute, Beijing, China
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Fernandez-Morera JL, Rodriguez-Rodero S, Tunon A, Martinez-Borra J, Vidal-Castineira JR, Lopez-Vazquez A, Rodrigo L, Rodrigo P, González S, Lahoz CH, Lopez-Larrea C. Genetic influence of the nonclassical major histocompatibility complex class I molecule MICB in multiple sclerosis susceptibility. ACTA ACUST UNITED AC 2008; 72:54-9. [PMID: 18588574 DOI: 10.1111/j.1399-0039.2008.01066.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
It has been widely reported that the major histocompatibility complex (MHC) class II region provides the main genetic contribution to multiple sclerosis (MS) susceptibility. However, recent studies have suggested that the MHC class I region may also contribute to the development of MS. In this study, we investigated the possible association of the human leukocyte antigen (HLA)-B, MHC class I chain-related gene B (MICB) and MHC class I chain-related gene A (MICA) genes, located in the MHC class I region, with MS susceptibility. For this purpose, we analyzed the distribution of HLA-DR, HLA-B, MICB and MICA alleles in 121 MS patients and 156 healthy controls. Neither HLA-B nor MICA alleles were found to be associated with MS susceptibility, and only the frequency of HLA-DRB1*01 allele was found to be increased in controls (31% vs 14%, P(c) = 0.011). However, MICB*004 allele frequency was significantly increased in MS patients (46.3% vs 23.3%, P(c) < 0.001, odds ratio = 2.82, 95% confidence interval = 1.68-4.73). Although, MICB*004 and HLA-DRB1*15 belong to the AH 7.1 ancestral haplotype, the association of MICB*004 to MS susceptibility was found to be independent of HLA-DRB1*15 in our population. This and previous studies clearly suggest that the MHC class I, in addition to class II, could be involved in MS susceptibility.
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Affiliation(s)
- J L Fernandez-Morera
- Histocompatibility and Transplant Unit, Hospital Universitario Central de Asturias, Oviedo, Spain
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Jones DC, Edgar RS, Ahmad T, Cummings JRF, Jewell DP, Trowsdale J, Young NT. Killer Ig-like receptor (KIR) genotype and HLA ligand combinations in ulcerative colitis susceptibility. Genes Immun 2006; 7:576-82. [PMID: 16929347 DOI: 10.1038/sj.gene.6364333] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Killer immunoglobulin-like receptors (KIRs) are expressed on natural killer cells and some T-cell subsets and produce either activation or inhibitory signals upon binding with the appropriate human leucocyte antigen (HLA) ligand on target cells. Recent genetic association studies have implicated KIR genotype in the development of several inflammatory conditions. Ulcerative colitis (UC) is an inflammatory disorder of the colonic mucosa that results from an inappropriate activation of the immune system driven by host bacterial flora. We developed a polymerase chain reaction-sequence specific primer (SSP)-based assay to genotype 194 UC patients and 216 control individuals for 14 KIR genes, the HLA-Cw ligand epitopes of the KIR2D receptors and a polymorphism of the lectin-like-activating receptor NKG2D. Initial analysis found the phenotype frequency of KIR2DL2 and -2DS2 to be significantly increased in the UC cohort (P=0.030 and 0.038, respectively). Logistic regression analysis revealed a protective effect conferred by KIR2DL3 in the presence of its ligand HLA-Cw group 1 (P=0.019). These results suggest that KIR genotype and HLA ligand interaction may contribute to the genetic susceptibility of UC.
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Affiliation(s)
- D C Jones
- Division of Immunology, Department of Pathology, University of Cambridge, Cambridge, UK
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Fdez-Morera JL, Tunon A, Rodriguez-Rodero S, Rodrigo L, Martinez-Borra J, Gonzalez S, Lopez-Vazquez A, Lahoz CH, Lopez-Larrea C. Clinical behavior of multiple sclerosis is modulated by the MHC class I-chain-related gene A. ACTA ACUST UNITED AC 2006; 67:409-14. [PMID: 16671949 DOI: 10.1111/j.1399-0039.2006.00593.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
It is well known that certain HLA class II alleles confer an increased risk for developing multiple sclerosis (MS). Recent studies have suggested HLA class I as a region that may also contribute to the development of MS. In this study, we investigated the association between HLA-DR, HLA-B alleles, and major histocompatibility complex (MHC) class I-chain-related gene A (MICA) transmembrane (MICA-TM) polymorphisms and disease progression in 104 MS patients and 116 healthy controls. DR1 was found to be decreased in patients when compared with controls (p(c) = 0.012). Neither HLA-B nor HLA-DR alleles were found to be associated with MS susceptibility. Furthermore, the prevalence of MICA-A5 in patients with relapsing MS was 9% while the prevalence in progressive forms was 42% (p(c) = 0.0015). The extended haplotypes related to MICA-TM5 that were found in our population were DR7-MICA5-B64 (EH 64.1, delta(s) = 0.38), DR4-MICA5-B62 (EH 62.1, delta(s) = 0.28), and DR11-MICA5-B35 (EH35.1, delta(s) = 0.10), but none of them were found to be associated to MS susceptibility or disease progression. Our data could indicate a possible role of MICA-TM in MS prognosis.
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Affiliation(s)
- J L Fdez-Morera
- Histocompatibility and Transplant Unit, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain
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Furukawa H, Morichi H, Moriyasu T, Nishimura T, Ohmori Y, Hiratsuka T, Saiga T. FAMILY STUDY SHOWING A CLOSE ASSOCIATION OF HLA DPB1*0202/0901 WITH ULCERATIVE COLITIS. Dig Endosc 2006. [DOI: 10.1111/j.1443-1661.2006.00630.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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Abstract
The human leucocyte antigen (HLA) complex on chromosome 6p21.3 is the most extensively studied genetic region in Inflammatory bowel disease (IBD). Consistent evidence of linkage to IBD3 (6p21.1-23), an area which encompasses the HLA complex, has been demonstrated for both Crohn’s disease and ulcerative colitis, and a number of replicated associations with disease susceptibility and phenotype have recently emerged. However, despite these efforts the HLA susceptibility gene (s) for IBD remain elusive, a consequence of strong linkage disequilibrium, extensive polymorphism and high gene density across this region. This article reviews current knowledge of the role of HLA complex genes in IBD susceptibility and phenotype, and discusses the factors currently limiting the translation of this knowledge to clinical practice.
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Affiliation(s)
- Tariq Ahmad
- Gastroenterology Unit, University of Oxford, Gibson Laboratories, Radcliffe Infirmary, UK.
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Lü M, Xia B, Li J, Ye M, Zhang X, Tan Q. MICB microsatellite polymorphism is associated with ulcerative colitis in Chinese population. Clin Immunol 2006; 120:199-204. [PMID: 16679067 DOI: 10.1016/j.clim.2006.03.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2005] [Revised: 02/27/2006] [Accepted: 03/08/2006] [Indexed: 12/12/2022]
Abstract
The MHC class I-related molecules A and B (MICA and MICB) are stress-inducible cell surface antigens that are recognized by immunocytes bearing the receptor NKG2D, including intestinal epithelial Vdelta1 gammadelta T cells, which may play a role in immunological reaction in intestinal mucosa. The present study was aimed to investigate the association of the microsatellite polymorphisms in the intron 1 of MICB and the MICA-MICB haplotype with the susceptibility to ulcerative colitis (UC) in Chinese population. The microsatellite polymorphisms of MICB were genotyped in unrelated 127 Chinese patients with UC and 193 ethnically matched healthy controls by a semiautomatic fluorescently labeled PCR method. All the subjects were the Chinese with Han nationality. The frequency of MICB-CA18 was significantly higher in UC patients compared with the healthy controls (14.0% vs. 5.8%, P = 0.0016, Pc = 0.024, OR = 2.637, 95%CI: 1.443-4.820) and was increased in the female patients compared with the female healthy controls (18.3% vs. 4.1%, P = 0.0006, Pc = 0.0080, OR = 5.224, 95%CI: 1.940-14.069). Thus, MICB-CA18 is positively associated with UC and female UC patients in Chinese population.
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Affiliation(s)
- Min Lü
- Department of Internal Medicine and Geriatrics, and Research Center of Digestive Diseases, Zhongnan Hospital, PR China
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Ding Y, Xia B, Lü M, Zhang Y, Li J, Ye M, Luo H, Yu J, Zhang X, Tan J. MHC class I chain-related gene A-A5.1 allele is associated with ulcerative colitis in Chinese population. Clin Exp Immunol 2005; 142:193-8. [PMID: 16178876 PMCID: PMC1809485 DOI: 10.1111/j.1365-2249.2005.02907.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The human MHC class I chain-related gene A (MICA) plays a role in regulating protective responses by intestinal epithelial Vdelta1 gamma delta T cells and the polymorphism of MICA were reported to be related to several autoimmune diseases. The present study aimed to investigate the association of the microsatellite polymorphisms of TM region of MICA gene with the susceptibility to ulcerative colitis (UC) in Chinese population. The microsatellite polymorphisms of the MICA were genotyped in unrelated 86 Chinese patients with UC and 172 ethnically matched healthy controls by a semiautomatic fluorenscently labelled PCR method. All the subjects were the Chinese with Han nationality. The frequency of MICA-A5.1 homozygous genotype and A5.1 allele were significantly increased in UC patients compared with healthy controls (22.1%versus 7%, P = 0.0009, Pc = 0.0126, OR = 3.781, 95%CI: 1.738-8.225 and 30.2%versus 17.4%, P = 0.0014, Pc = 0.007, OR = 2.051, 95%CI: 1.336-3.148, respectively). Adjusted the effects of gender and age at onset, MICA-A5.1 homozygous genotype and A5.1 allele were also increased in the UC patients. Moreover MICA-A5.1 allele was significantly increased in frequency in the female UC patients (38.2%versus 21.0%, P = 0.0095, Pc = 0.0475, OR = 2.326, 95%CI: 1.234-4.382). Logistic regression analysis also revealed that gender was independently associated with UC patients carried MICA-A5.1 allele (P = 0.046, OR (male) = 0.511, 95% CI: 0.264-0.987). Although the UC patients with extensive colitis (32.5%versus 17.4% in the healthy controls, P = 0.005, Pc = 0.025) and the UC patients with extraintestinal manifestations (36%versus 17.4% in the healthy controls, P = 0.0039, Pc = 0.0195) were more likely to carry the MICA-A5.1 allele, EIMs was associated with extent of disease (P < 0.0001, OR (with EIMs) = 3.511, 95% CI 1.747-7.056) and MICA-A5.1 allele was not associated with UC patients with extensive colitis or with EIMs in the logistic regression analysis. Therefore, the MICA-A5.1 homozygous genotype and A5.1 allele were closely associated with UC and the MICA-A5.1 allele was positively associated with the female UC patients in Chinese population.
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Affiliation(s)
- Yijuan Ding
- Department of Gastroenterology, Renmin Hospital, Wuhan University School of MedicineWuhan
| | - Bing Xia
- Department of Internal Medicine & Geriatrics, Research Centre of Digestive Diseases of Zhongnan HospitalPeoples Republic of China
- Department of Key Laboratory of Allergy and Immune Related Diseases, Wuhan University School of MedicineWuhan
| | - Min Lü
- Department of Internal Medicine & Geriatrics, Research Centre of Digestive Diseases of Zhongnan HospitalPeoples Republic of China
| | - Yan Zhang
- Department of Internal Medicine & Geriatrics, Research Centre of Digestive Diseases of Zhongnan HospitalPeoples Republic of China
| | - Jin Li
- Department of Internal Medicine & Geriatrics, Research Centre of Digestive Diseases of Zhongnan HospitalPeoples Republic of China
| | - Mei Ye
- Department of Internal Medicine & Geriatrics, Research Centre of Digestive Diseases of Zhongnan HospitalPeoples Republic of China
| | - Hesheng Luo
- Department of Gastroenterology, Renmin Hospital, Wuhan University School of MedicineWuhan
| | - Jieping Yu
- Department of Gastroenterology, Renmin Hospital, Wuhan University School of MedicineWuhan
| | - Xiaolian Zhang
- Department of Internal Medicine & Geriatrics, Research Centre of Digestive Diseases of Zhongnan HospitalPeoples Republic of China
| | - Jingquan Tan
- Department of Internal Medicine & Geriatrics, Research Centre of Digestive Diseases of Zhongnan HospitalPeoples Republic of China
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N/A, 胡 刚, 林 连, 郑 长. N/A. Shijie Huaren Xiaohua Zazhi 2005; 13:1570-1573. [DOI: 10.11569/wcjd.v13.i13.1570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/26/2023] Open
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López-Vázquez A, Fuentes D, Rodrigo L, González S, Moreno M, Fernández E, Martínez-Borra J, López-Larrea C. MHC class I region plays a role in the development of diverse clinical forms of celiac disease in a Saharawi population. Am J Gastroenterol 2004; 99:662-7. [PMID: 15089899 DOI: 10.1111/j.1572-0241.2004.04134.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the association of MHC genes in the development of celiac disease (CD) and its diverse clinical forms in a Saharawi population. METHODS One hundred and twenty-five CD patients and 98 healthy controls were selected from the Saharawi refugee camps in Tindouf. All were investigated for the presence of antitransglutaminase 2 antibodies. Patients were divided into two groups according to their clinical manifestations: 70 typical and 55 atypical. Patients and controls were typed for HLA-B, DRB1, DQB1, and DQA1, and for MICA transmembrane polymorphism. RESULTS The frequency of HLA-DQ2 in Saharawi controls was notably increased compared with other populations. No differences in the distribution of DQ2 in either group of patients were found. However, the haplotype B8/DR3/DQ2 was notably overrepresented in atypical patients compared to typical ones (pc= 0.001). The MICA-A5.1 allele was increased in atypical CD patients compared to those with typical forms (pc= 0.0006). Finally, we found that the increased frequency of MICA-A5.1 in the atypical group was independent of the linkage disequilibrium with B8/DR3/DQ2 haplotype (p= 0.02). CONCLUSIONS The elevated prevalence of CD in Saharawi seems to be related to the high frequency of HLA-DQ2 in this population. However, the development of atypical or typical forms of the disease may be due to a gene or genes located in the class I side of the haplotype B8/DR3/DQ2, especially MICA. This appears not to be implicated in the susceptibility to CD but may play an important role in the development of the different forms of the disease.
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