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Clinical heterogeneity in autoimmune acute liver failure

World Journal of Gastroenterology 2007年第12期13卷 1824-1827页

作者： Norberto C Chavez-Tapia julio Martinez-Salgado julio granados Misael Uribe Felix I Tellez-Avila Department of Gastroenterology Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Mexico City MexicoJulio Granados Department of Immunology and Rheumatology Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Mexico City Mexico Department of Immunology and Rheumatology Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Mexico City Mexico

AIM: To describe the outcome and prognosis in a cohort of patients with acute liver failure due to autoimmune hepatitis without liver transplantation. METHODS: A retrospective trial was conducted in 11 patients with acute liver failure due to autoimmune hepatitis who attended the Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubiran. Demographic, biochemical and severity indexes, and treatment and outcome were assessed. RESULTS: Among the 11 patients, with a median age of 31 years, 72% had inflammatory response syndrome, and six patients received corticosteroids. The mortality rate within four weeks was 56%, and the one-year survival was 27%. In the survivors, severity indexes were lower and 83% received corticosteroids. CONCLUSION: We observed a relatively high survival rate in patients with acute liver failure due to autoimmune hepatitis. This survival rate could be influenced by severity of the disease and/or use of corticosteroids.

关键词： Autoimmune hepatitis Acute liver failure Corticosteroids

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Association of the HLA-DRB1*0701 allele with perinuclear anti-neutrophil cytoplasmatic antibodies in Mexican patients with severe ulcerative colitis

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World Journal of Gastroenterology 2006年第10期12卷 1617-1620页

作者： Jesus K Yamamoto-Furusho Luis Uscanga-Domínguez Alondra Lopez-Martinez julio granados Department of Gastroenterology Institute Nacional de Ciencias Médicas y Nutrición Salvador Zubirán.México D FMéxico Department of Immunology Institute Nacional de Ciencias Médicas y Nutrición Salvador Zubirán.México D FMéxico

AIM： To determine the association between the HLADRB1 alleles and perinuclear anti-neutrophil cytoplasmatic antibodies （p-ANCA） positive in Mexican patients with ulcerative colitis （UC）. METHODS： Ninety Mexican mestizo patients （45 females） with UC, confirmed by biopsy, were studied. High resolution HLA typing was performed by PCR-SSO reverse dot blot and PCR-SSP. Molecular typing techniques were applied to define HLA-DRB1 alleles. Enzyme-linked immunosorbent assay and immunofluorescence techniques were used to detect p-ANCA. RESULTS： Forty-eight （53%） UC patients were positive for p-ANCA by ELISA and IF. We found that p-ANCA- positive UC patients had a significantly increased frequency of HLA-DR7 compared with p-ANCA-negative controls （22% vs 5.1%; pC=0.02, OR=5.2, CI 95%： 1.06-37.82）. Disease activity was scored as severe in 20 patients, moderate in 8, mild in 14 and no activity in the remaining 38 patients according to the Truelove and Witts criteria. Subgroup analysis showed a significantly increased frequency of the HLA-DRB1＊07 allele in 15 of 20 UC patients with severe activity of UC and p-ANCA positivity [100% vs 0%; pC=0.0000001; OR=35]. No significant differences were found between p-ANCA positive patients, HLA-DR alleles and other clinical features such as extraintestinal manifestations, proctocolectomy and ***： The HLA-DRB1＊07 is associated with p-ANCA positive UC Mexican patients.

关键词： HLA-DR p-ANCA Ulcerative colitis Mexicans

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ApoB-100, ApoE and CYP7A1 gene polymorphisms in Mexican patients with cholesterol gallstone disease

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World Journal of Gastroenterology 2010年第37期16卷 4685-4690页

作者： Sánchez-Cuén Jaime Aguilar-Medina Maribel Arámbula-Meraz Eliakym Romero-Navarro José granados julio Sicairos-Medina Laura Ramos-Payán Rosalío División de Gastroenterología Hospital Regional ISSSTE Facultad de Ciencias Químico Biológicas Doctorado en Biotecnología y Maestría en Ciencias Biomédicas Universidad Autónoma de Sinaloa División de Inmunogenética Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán

AIM: To determine the possible association of the ApoB100 (Xba Ⅰ ), ApoE (Hha Ⅰ ) and CYP7A1 (Bsa Ⅰ ) gene polymorphisms, with the development of cholesterol gallstone disease (GD) in a Mexican population. METHODS: The polymorphisms were analyzed by polymerase chain reaction followed by restriction fragment length polymorphism, in two groups matched by ethnicity, age and sex: patients with GD (n = 101) and stone-free control subjects (n = 101). RESULTS: Allelic frequencies in patients and controls were: 34.16% vs 41.58% (P = 0.124) for X+of ApoB-100; 4.46% vs 5.94% (P = 0.501) for E2, 85.64% vs 78.22% (P = 0.052) for E3, 9.90% vs 15.84% (P = 0.075) for E4 of ApoE; and 25.74% vs 27.72% (P = 0.653) for C of CYP7A1. Differences in genotypic frequencies between the studied groups were not significant (P < 0.05). CONCLUSION: These results demonstrated that no association exists between the studied polymorphisms and cholelithiasis in this high prevalent population.

关键词： Apolipoprotein CYP7A1 Gallstones Mexicans Polymorphisms

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Role of the HLA-DQ locus in the development of chronic gastritis and gastric carcinoma in Mexican patients

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World Journal of Gastroenterology 2006年第48期12卷 7762-7767页

作者： Roberto Herrera-Goepfert Jesús K Yamamoto-Furusho Luis F Oate-Ocaa Margarita Camorlinga-Ponce Leopoldo Muoz Jorge A Ruiz-Morales Gilberto Vargas-Alarcón julio granados Cellular Biology Section Department of Pathology Institute Nacional de Cancerologia (INCan) Mexico City Mexico Department of Immunology and Rheumatology Institute Nacional de Ciencias Medicas y Nutricion Salvador Zubiran Mexico City Mexico Department of Gastroenterology Institute Nacional de Ciencias Medicas y Nutricion Salvador Zubiran Mexico City Mexico Department of Gastroenterology (INCan) Mexico City Mexico Medical Research Unit on Infectious and Parasitic Diseases Hospital de Pediatria Centro Medico Nacional Siglo XXI (CMN-SXXI) Institute Mexicano del Seguro Social (IMSS) Mexico City Mexico Department of Immunology and Rheumatology Institute Nacional de Ciencias Medicas y Nutricion Salvador Zubiran Mexico City Mexico Department of Physiology Institute Nacional de Cardiologia Ignacio Chavez Mexico City Mexico

AIM： To determine the HLA-DQ locus in Mexican patients with Chronic gastritis and gastric adenocarcinoma.METHODS： Oligotyping for HLA-DQ locus was performed in 45 Mexican patients with chronic gastritis and 13 Mexican patients with diffuse-type gastric adenocarcinoma, and was then compared with 99 clinically healthy unrelated individuals. H pylori infection and CagA status were assessed in patients by enzyme-linked immunosorbent assay （EUSA） method. RESULTS： We found a significant increased frequency of HLA-DQBI＊0401 allele in Hpylori-positive patients with chronic gastritis when compared with healthy subjects [19 vs 0%, P = 1 × 10^-7, odds ratio （OR） = 4.96; 95% confidence interval （95% CI）, 3.87-6.35]. We also found a significant increased frequency of HLA-DQBI＊0501 in patients with diffuse-type gastric carcinoma in comparison with healthy individuals （P = 1 × 10^4, OR = 13.07; 95% CI, 2.82-85.14）.CONCLUSION： HLA-DQ locus may play a different role in the development of H pylori-related chronic gastritis and difffuse-type gastric adenocarcinoma in the Mexican Mestizo population.

关键词： HLA-DQ HLA-DQ5 HLA-DQBI*0501 Hpy/or/ Chronic gastritis Gastric cancer Diffuse-type adenocarcinoma

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