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Martínez-Nava GA, Zamudio-Cuevas Y, Terrazas-Ontiveros NA, Martínez-Flores K, Espinosa-Morales R, Mijares-Díaz F, Juárez-Barreto SM, Lozada-Pérez C, Valdés-Flores M, Sánchez-Sánchez R, Hidalgo-Bravo A, Fernández-Torres J. A proposed HLA-B*27 screening method for ankylosing spondylitis detection based on tag-single nucleotide polymorphisms: a preliminary study. Mol Biol Rep 2021; 48:7819-7829. [PMID: 34643924 DOI: 10.1007/s11033-021-06801-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 10/01/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND Ankylosing spondylitis (AS) is a type of inflammatory arthritis that affects primarily the spine. There is a strong association of the HLA-B*27 allele with AS pathogenesis, but recent studies have demonstrated the participation of ERAP1 gene in the genetic susceptibility. The aim of this study was to determine whether HLA-B tag-single nucleotide polymorphisms (SNPs) and ERAP1-related genetic variations associated with AS have equal or similarly performance in patients´ screening compared to HLA-B*27 standard genotyping in Mexican population. METHODS AND RESULTS Genomic DNA from patients with AS and population-based controls from Mexico City was analyzed for five single nucleotide polymorphisms (SNPs): rs4349859, rs13202464, rs116488202, tagging HLA-B*27; and rs30187 and rs27044 in ERAP1 gene. TaqMan genotype assay method was used for SNPs genotyping. We found a significant association between AS and the heterozygote genotypes and minor alleles of the HLA-B*27 tag-SNPs, as well as for their haplotypes. With respect to ERAP1 polymorphisms, no significant associations were observed (p > 0.05). The sensitivity and specificity analysis showed values of 0.96 and 1.00 for the rs4349859 SNP, and 0.96 and 0.94 for the rs116488202 SNP, respectively, in detecting HLA-B*27 compared to the B27 test as the gold standard. CONCLUSIONS HLA-B*27 tag-SNPs are associated with AS susceptibility; furthermore, the rs4349859 SNP by its own have an outstanding performance in detecting HLA-B*27 and therefore can be proposed as screening marker in the identification of HLA-B*27 in our population.
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Affiliation(s)
| | - Yessica Zamudio-Cuevas
- Synovial Fluid Laboratory, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
| | | | - Karina Martínez-Flores
- Synovial Fluid Laboratory, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
| | - Rolando Espinosa-Morales
- Rheumatology Department, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
| | - Fernando Mijares-Díaz
- Facultad de Medicina, Universidad Autónoma de Guadalajara, Guadalajara, Jalisco, Mexico
| | | | - Carlos Lozada-Pérez
- Rheumatology Department, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
| | - Margarita Valdés-Flores
- Genetics Service, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
| | - Roberto Sánchez-Sánchez
- Unidad de Ingeniería de Tejidos, Terapia Celular y Medicina Regenerativa, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
| | - Alberto Hidalgo-Bravo
- Genetics Service, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
| | - Javier Fernández-Torres
- Synovial Fluid Laboratory, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico. .,Biology Department, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico.
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Mayan alleles of the HLA-DRB1 major histocompatibility complex might contribute to the genetic susceptibility to systemic lupus erythematosus in Mexican patients from Tapachula, Chiapas. Clin Rheumatol 2021; 40:3095-3103. [PMID: 33575923 DOI: 10.1007/s10067-021-05636-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 01/05/2021] [Accepted: 02/04/2021] [Indexed: 10/22/2022]
Abstract
INTRODUCTION Systemic lupus erythematosus (SLE) is the prototypic autoimmune disease that disrupts numerous immunity mechanisms with the potential to exert damage to any organ or tissue. Its etiology remains uncertain; however, genetic and environmental factors that differ between populations strongly influence its development. Among the physiopathogenic factors, the genetic ones predominate, notably the major histocompatibility complex (MHC) loci. A high degree of ethnical admixture makes Mexican Mestizos a thoroughly genetically heterogeneous population. Therefore, this study aimed to identify the MHC polymorphisms associated with SLE development in Mexican Mestizos from Southern Mexico and compare them with patients from Mexico City. METHOD A transversal study in SLE patients from Tapachula, Chiapas, was conducted. DNA typing of human leukocyte antigens (HLA) classes I and II was performed using single specific primers (SSP). Admixture analysis was performed using the population genetics LEADMIX software. RESULTS The frequencies of HLA-DRB1*16 and HLA-DQB1*05 were found to have a tendency towards increase in SLE patients, compared to ethnically matched healthy controls. The allele HLA-DRB1*03 seemed to be less associated with SLE in this group of Mexican Mestizos, opposed to other more Caucasian populations. Admixture analysis showed a higher Mayan genetic component in these patients from Chiapas. CONCLUSIONS The genetic susceptibility for SLE differed in two populations of Mexican Mestizos with dissimilar ethnic ancestries. Autochthonous Amerindian alleles, and not the more widely known Caucasian alleles, might be associated with the susceptibility to SLE in Mexican Mestizos from Tapachula, Chiapas. Key Points • Autochthonous Amerindian alleles, such as HLA-DRB1*16, had a tendency to be increased in SLE patients, compared to healthy controls. • SLE susceptibility alleles vary considerably among regions in Mexico, according to the distribution of the indigenous groups. • Ethnic admixture is a key determinant in the genetic susceptibility of SLE.
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Romero-López JP, Carnalla-Cortés M, Pacheco-Olvera DL, Ocampo-Godínez JM, Oliva-Ramírez J, Moreno-Manjón J, Bernal-Alferes B, López-Olmedo N, García-Latorre E, Domínguez-López ML, Reyes-Sandoval A, Jiménez-Zamudio L. A bioinformatic prediction of antigen presentation from SARS-CoV-2 spike protein revealed a theoretical correlation of HLA-DRB1*01 with COVID-19 fatality in Mexican population: An ecological approach. J Med Virol 2020; 93:2029-2038. [PMID: 32986250 PMCID: PMC7537233 DOI: 10.1002/jmv.26561] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/31/2020] [Accepted: 09/25/2020] [Indexed: 12/18/2022]
Abstract
SARS‐CoV‐2 infection is causing a pandemic disease that is reflected in challenging public health problems worldwide. Human leukocyte antigen (HLA)‐based epitope prediction and its association with disease outcomes provide an important base for treatment design. A bioinformatic prediction of T cell epitopes and their restricted HLA Class I and II alleles was performed to obtain immunogenic epitopes and HLA alleles from the spike protein of the severe acute respiratory syndrome coronavirus 2 virus. Also, a correlation with the predicted fatality rate of hospitalized patients in 28 states of Mexico was done. Here, we describe a set of 10 highly immunogenic epitopes, together with different HLA alleles that can efficiently present these epitopes to T cells. Most of these epitopes are located within the S1 subunit of the spike protein, suggesting that this area is highly immunogenic. A statistical negative correlation was found between the frequency of HLA‐DRB1*01 and the fatality rate in hospitalized patients in Mexico. First HLA association study for COVID‐19 in Mexico An epitope prediction for HLA Class I and II provided a list of highly immunogenic epitopes from the S protein of SARS‐CoV2 with potential use for vaccine development. A multi‐level approach revealed a correlation of HLA‐DRB1*01 frequency with fatality in Mexican hospitalized patients at ecological level.
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Affiliation(s)
- José Pablo Romero-López
- Carrera de Médico Cirujano, Facultad de Estudios Superiores Iztacala, UNAM, Avenida de los Barrios 1, Tlalnepantla de Baz, Estado de México, Mexico.,Laboratorio de Inmunoquímica 1, Posgrado en Ciencias Quimicobiológicas, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala SN, Mexico City, Mexico
| | - Martha Carnalla-Cortés
- Centro de Investigación en Salud Poblacional, Instituto Nacional de Salud Pública, Cuernavaca, Mexico
| | - Diana L Pacheco-Olvera
- Laboratorio de Inmunoquímica 1, Posgrado en Ciencias Quimicobiológicas, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala SN, Mexico City, Mexico.,Unidad Médica de Investigación en Inmunoquímica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, IMSS, Mexico City, Mexico
| | - Juan Moisés Ocampo-Godínez
- Carrera de Médico Cirujano, Facultad de Estudios Superiores Iztacala, UNAM, Avenida de los Barrios 1, Tlalnepantla de Baz, Estado de México, Mexico.,Laboratorio de Inmunoquímica 1, Posgrado en Ciencias Quimicobiológicas, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala SN, Mexico City, Mexico.,Laboratorio de Ingeniería de Tejidos, Posgrado de la Facultad de Odontología, UNAM, Mexico City, Mexico
| | | | - Julia Moreno-Manjón
- Laboratorio de Infectología, Microbiología e Inmunología Clínicas, Unidad de Investigación en Medicina Experimental, Facultad de Medicina, UNAM, Mexico City, Mexico.,Laboratorio de Bacteriología Médica, Posgrado en Ciencias Quimicobiológicas, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala SN, Mexico City, Mexico
| | - Brian Bernal-Alferes
- Laboratorio de Inmunoquímica 1, Posgrado en Ciencias Quimicobiológicas, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala SN, Mexico City, Mexico.,Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Nancy López-Olmedo
- Centro de Investigación en Salud Poblacional, Instituto Nacional de Salud Pública, Cuernavaca, Mexico
| | - Ethel García-Latorre
- Laboratorio de Inmunoquímica 1, Posgrado en Ciencias Quimicobiológicas, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala SN, Mexico City, Mexico
| | - María Lilia Domínguez-López
- Laboratorio de Inmunoquímica 1, Posgrado en Ciencias Quimicobiológicas, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala SN, Mexico City, Mexico
| | - Arturo Reyes-Sandoval
- Nuffield Department of Medicine, The Jenner Institute, The Henry Welcome Building for Molecular Physiology, University of Oxford, Oxford, UK
| | - Luis Jiménez-Zamudio
- Laboratorio de Inmunología Clínica 1, Posgrado en Ciencias Quimicobiológicas, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
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Beecham AH, Amezcua L, Chinea A, Manrique CP, Rubi C, Isobe N, Lund BT, Santaniello A, Beecham GW, Burchard EG, Comabella M, Patsopoulos N, Fitzgerald K, Calabresi PA, De Jager P, Conti DV, Delgado SR, Oksenberg JR, McCauley JL. The genetic diversity of multiple sclerosis risk among Hispanic and African American populations living in the United States. Mult Scler 2020; 26:1329-1339. [PMID: 31368393 PMCID: PMC6994382 DOI: 10.1177/1352458519863764] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Substantial progress has been made toward unraveling the genetic architecture of multiple sclerosis (MS) within populations of European ancestry, but few genetic studies have focused on Hispanic and African American populations within the United States. OBJECTIVE We sought to test the relevance of common European MS risk variants outside of the major histocompatibility complex (n = 200) within these populations. METHODS Genotype data were available on 2652 Hispanics (1298 with MS, 1354 controls) and 2435 African Americans (1298 with MS, 1137 controls). We conducted single variant, pathway, and cumulative genetic risk score analyses. RESULTS We found less replication than statistical power suggested, particularly among African Americans. This could be due to limited correlation between the tested and causal variants within the sample or alternatively could indicate allelic and locus heterogeneity. Differences were observed between pathways enriched among the replicating versus all 200 variants. Although these differences should be examined in larger samples, a potential role exists for gene-environment or gene-gene interactions which alter phenotype differentially across racial and ethnic groups. Cumulative genetic risk scores were associated with MS within each study sample but showed limited diagnostic capability. CONCLUSION These findings provide a framework for fine-mapping efforts in multi-ethnic populations of MS.
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Affiliation(s)
- A H Beecham
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, FL, USA/The Dr. John T. Macdonald Foundation Department of Human Genetics, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - L Amezcua
- Department of Neurology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - A Chinea
- San Juan MS Center, Guaynabo, Puerto Rico, USA; Universidad Central del Caribe, Bayamon, Puerto Rico, USA
| | - C P Manrique
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - C Rubi
- San Juan MS Center, Guaynabo, Puerto Rico, USA; Universidad Central del Caribe, Bayamon, Puerto Rico, USA
| | - N Isobe
- Department of Neurological Therapeutics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - B T Lund
- Department of Neurology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - A Santaniello
- Department of Neurology, University of California at San Francisco, San Francisco, CA, USA
| | - G W Beecham
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, FL, USA/The Dr. John T. Macdonald Foundation Department of Human Genetics, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - E G Burchard
- Departments of Medicine and Bioengineering and Therapeutic Sciences, University of California at San Francisco, San Francisco, CA, USA
| | - M Comabella
- Servei de Neurologia-Neuroimmunologia, Centre d'Esclerosi Múltiple de Catalunya (Cemcat), Institut de Recerca Vall d'Hebron (VHIR), Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - N Patsopoulos
- Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - K Fitzgerald
- Department of Neurology and The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - P A Calabresi
- Department of Neurology and The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - P De Jager
- Center for Translational and Computational Neuroimmunology, Department of Neurology, Columbia University Medical Center, New York, NY, USA
| | - D V Conti
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - S R Delgado
- Multiple Sclerosis Division, Department of Neurology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - J R Oksenberg
- Department of Neurology, University of California at San Francisco, San Francisco, CA, USA
| | - J L McCauley
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, FL, USA/The Dr. John T. Macdonald Foundation Department of Human Genetics, Miller School of Medicine, University of Miami, Miami, FL, USA
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5
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López Gil C, Barquera R, Pavón-Vargas MDLÁ, Ramos-de la Cruz FDR, Méndez-Mani P, Arrieta-Bolaños E, Clayton S, Hernández-Zaragoza DI, Bravo-Acevedo A, Zúñiga J, Yunis EJ, Bekker-Méndez C, Granados J. Genetic diversity of HLA system in two populations from Puebla, Mexico: Puebla city and rural Puebla. Hum Immunol 2020; 81:547-549. [DOI: 10.1016/j.humimm.2019.07.290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 07/14/2019] [Indexed: 11/29/2022]
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6
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Barquera R, Martínez-Álvarez JC, Hernández-Zaragoza DI, Bravo-Acevedo A, Juárez-Nicolás F, Arriaga-Perea AJ, Vega-Martínez MDR, Ortega-Yáñez A, Benítez-Arvizu G, Arrieta-Bolaños E, Clayton S, Juárez-Cortés ED, López-Gil C, García-Álvarez R, Arrazola-García MA, Martínez-Bezies V, Juárez-Barreto V, Ramos-de la Cruz FDR, Macías-Medrano RM, Méndez-Mani P, Escutia-González A, Montiel-Hernández GD, Immel A, Pavón-Vargas MDLÁ, Salgado-Galicia N, Novelo-Garza B, Zúñiga J, Yunis EJ, Bekker-Méndez C, Granados J. Genetic diversity of HLA system in six populations from Mexico City Metropolitan Area, Mexico: Mexico City North, Mexico City South, Mexico City East, Mexico City West, Mexico City Center and rural Mexico City. Hum Immunol 2020; 81:539-543. [DOI: 10.1016/j.humimm.2019.07.297] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 07/21/2019] [Accepted: 07/22/2019] [Indexed: 11/25/2022]
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Clayton S, Barquera R, Uribe-Duarte MG, Goné Vázquez I, Zúñiga J, Arrieta-Bolaños E, Hernández-Zaragoza DI, Ruíz-Corral MDJ, Escobedo-Ruíz A, Arellano-Prado FP, García-Arias VE, Rodríguez-López ME, Bravo-Acevedo A, Sánchez-Fernández MGDJ, Aguilar-Campos JA, Serrano-Osuna R, Gómez-Navarro B, Sandoval-Sandoval MJ, Yunis EJ, Bekker-Méndez C, Granados J. Genetic diversity of HLA system in two populations from Sinaloa, Mexico: Culiacán and rural Sinaloa. Hum Immunol 2020; 81:482-484. [DOI: 10.1016/j.humimm.2019.06.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 06/06/2019] [Indexed: 01/04/2023]
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8
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Barquera R, Hernández-Zaragoza DI, Bravo-Acevedo A, Arrieta-Bolaños E, Clayton S, Acuña-Alonzo V, Martínez-Álvarez JC, López-Gil C, Adalid-Sáinz C, Vega-Martínez MDR, Escobedo-Ruíz A, Juárez-Cortés ED, Immel A, Pacheco-Ubaldo H, González-Medina L, Lona-Sánchez A, Lara-Riegos J, Sánchez-Fernández MGDJ, Díaz-López R, Guizar-López GU, Medina-Escobedo CE, Arrazola-García MA, Montiel-Hernández GD, Hernández-Hernández O, Ramos-de la Cruz FDR, Juárez-Nicolás F, Pantoja-Torres JA, Rodríguez-Munguía TJ, Juárez-Barreto V, Delgado-Aguirre H, Escutia-González AB, Goné-Vázquez I, Benítez-Arvizu G, Arellano-Prado FP, García-Arias VE, Rodríguez-López ME, Méndez-Mani P, García-Álvarez R, González-Martínez MDR, Aquino-Rubio G, Escareño-Montiel N, Vázquez-Castillo TV, Uribe-Duarte MG, Ruíz-Corral MDJ, Ortega-Yáñez A, Bernal-Felipe N, Gómez-Navarro B, Arriaga-Perea AJ, Martínez-Bezies V, Macías-Medrano RM, Aguilar-Campos JA, Solís-Martínez R, Serrano-Osuna R, Sandoval-Sandoval MJ, Jaramillo-Rodríguez Y, Salgado-Adame A, Juárez-de la Cruz F, Novelo-Garza B, Pavón-Vargas MDLÁ, Salgado-Galicia N, Bortolini MC, Gallo C, Bedoya G, Rothhammer F, González-José R, Ruiz-Linares A, Canizales-Quinteros S, Romero-Hidalgo S, Krause J, Zúñiga J, Yunis EJ, Bekker-Méndez C, Granados J. The immunogenetic diversity of the HLA system in Mexico correlates with underlying population genetic structure. Hum Immunol 2020; 81:461-474. [PMID: 32651014 DOI: 10.1016/j.humimm.2020.06.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 06/16/2020] [Accepted: 06/17/2020] [Indexed: 12/15/2022]
Abstract
We studied HLA class I (HLA-A, -B) and class II (HLA-DRB1, -DQB1) allele groups and alleles by PCR-SSP based typing in a total of 15,318 mixed ancestry Mexicans from all the states of the country divided into 78 sample sets, providing information regarding allelic and haplotypic frequencies and their linkage disequilibrium, as well as admixture estimates and genetic substructure. We identified the presence of 4268 unique HLA extended haplotypes across Mexico and find that the ten most frequent (HF > 1%) HLA haplotypes with significant linkage disequilibrium (Δ'≥0.1) in Mexico (accounting for 20% of the haplotypic diversity of the country) are of primarily Native American ancestry (A*02~B*39~DRB1*04~DQB1*03:02, A*02~B*35~DRB1*08~DQB1*04, A*68~B*39~DRB1*04~DQB1*03:02, A*02~B*35~DRB1*04~DQB1*03:02, A*24~B*39~DRB1*14~DQB1*03:01, A*24~B*35~DRB1*04~DQB1*03:02, A*24~B*39~DRB1*04~DQB1*03:02, A*02~B*40:02~DRB1*04~DQB1*03:02, A*68~B*35~DRB1*04~DQB1*03:02, A*02~B*15:01~DRB1*04~DQB1*03:02). Admixture estimates obtained by a maximum likelihood method using HLA-A/-B/-DRB1 as genetic estimators revealed that the main genetic components in Mexico as a whole are Native American (ranging from 37.8% in the northern part of the country to 81.5% in the southeastern region) and European (ranging from 11.5% in the southeast to 62.6% in northern Mexico). African admixture ranged from 0.0 to 12.7% not following any specific pattern. We were able to detect three major immunogenetic clusters correlating with genetic diversity and differential admixture within Mexico: North, Central and Southeast, which is in accordance with previous reports using genome-wide data. Our findings provide insights into the population immunogenetic substructure of the whole country and add to the knowledge of mixed ancestry Latin American population genetics, important for disease association studies, detection of demographic signatures on population variation and improved allocation of public health resources.
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Affiliation(s)
- Rodrigo Barquera
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History (MPI-SHH), Jena, Germany; Molecular Genetics Laboratory, Escuela Nacional de Antropología e Historia (ENAH), Mexico City, Mexico.
| | - Diana Iraíz Hernández-Zaragoza
- Molecular Genetics Laboratory, Escuela Nacional de Antropología e Historia (ENAH), Mexico City, Mexico; Immunogenetics Unit, Técnicas Genéticas Aplicadas a la Clínica (TGAC), Mexico City, Mexico
| | - Alicia Bravo-Acevedo
- Blood Bank, UMAE Hospital de Gineco Obstetricia No. 4 "Luis Castelazo Ayala", Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | | | - Stephen Clayton
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History (MPI-SHH), Jena, Germany
| | - Víctor Acuña-Alonzo
- Molecular Genetics Laboratory, Escuela Nacional de Antropología e Historia (ENAH), Mexico City, Mexico
| | - Julio César Martínez-Álvarez
- HLA Laboratory, Central Blood Bank, Hospital de Especialidades, Unidad Médica de Alta Especialidad (UMAE), Centro Médico Nacional "Siglo XXI", Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | - Concepción López-Gil
- Histocompatibility Laboratory, Unidad Médica de Alta Especialidad (UMAE) # 6, Instituto Mexicano del Seguro Social (IMSS), Puebla, Puebla, Mexico
| | - Carmen Adalid-Sáinz
- Laboratory of Histocompatibility, Unidad Médica de Alta Especialidad (UMAE) # 71, Instituto Mexicano del Seguro Social (IMSS), Torreón, Coahuila, Mexico
| | - María Del Rosario Vega-Martínez
- Molecular Biology and Histocompatibility Laboratory, Hospital Central Sur de Alta Especialidad, Petróleos Mexicanos (PEMEX), Mexico City, Mexico
| | - Araceli Escobedo-Ruíz
- Histocompatibility Laboratory, Hospital de Especialidades, Centro Médico Nacional de Occidente (CMNO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara, Jalisco, Mexico
| | - Eva Dolores Juárez-Cortés
- Histocompatibility Laboratory, Central Blood Bank, Centro Médico Nacional "La Raza", Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | - Alexander Immel
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History (MPI-SHH), Jena, Germany; Institute of Clinical Molecular Biology (IKMB), Kiel University, University Hospital, Schleswig-Holstein, Germany
| | - Hanna Pacheco-Ubaldo
- Molecular Genetics Laboratory, Escuela Nacional de Antropología e Historia (ENAH), Mexico City, Mexico
| | - Liliana González-Medina
- Molecular Genetics Laboratory, Escuela Nacional de Antropología e Historia (ENAH), Mexico City, Mexico
| | - Abraham Lona-Sánchez
- Molecular Genetics Laboratory, Escuela Nacional de Antropología e Historia (ENAH), Mexico City, Mexico
| | - Julio Lara-Riegos
- Chemistry Faculty, Universidad Autónoma de Yucatán (UADY), Mérida, Yucatán, Mexico
| | - María Guadalupe de Jesús Sánchez-Fernández
- Department of Nephrology and Transplantation Unit, Centro Médico Nacional de Occidente (CMNO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara, Jalisco, Mexico
| | - Rosario Díaz-López
- Molecular Biology Laboratory, Hospital Central Militar, Secretaría de la Defensa Nacional (SEDENA), Mexico City, Mexico
| | - Gregorio Ulises Guizar-López
- Molecular Biology Laboratory, Hospital Central Militar, Secretaría de la Defensa Nacional (SEDENA), Mexico City, Mexico
| | - Carolina Elizabeth Medina-Escobedo
- Unit of Research and Education in Health, Unidad Médica de Alta Especialidad (UMAE) # 10, Instituto Mexicano del Seguro Social (IMSS), Mérida, Yucatán, Mexico
| | - María Araceli Arrazola-García
- HLA Laboratory, Central Blood Bank, Hospital de Especialidades, Unidad Médica de Alta Especialidad (UMAE), Centro Médico Nacional "Siglo XXI", Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | | | | | - Flor Del Rocío Ramos-de la Cruz
- Histocompatibility Laboratory, Unidad Médica de Alta Especialidad (UMAE) # 6, Instituto Mexicano del Seguro Social (IMSS), Puebla, Puebla, Mexico
| | | | - Jorge Arturo Pantoja-Torres
- Immunology Division, Unidad Médica de Alta Especialidad (UMAE) # 1, Instituto Mexicano del Seguro Social (IMSS), León, Guanajuato, Mexico
| | - Tirzo Jesús Rodríguez-Munguía
- Molecular Biology Laboratory, Hospital General "Norberto Treviño Zapata", Dirección de Servicios de Salud de Tamaulipas, Ciudad Victoria, Tamaulipas, Mexico
| | | | - Héctor Delgado-Aguirre
- Laboratory of Histocompatibility, Unidad Médica de Alta Especialidad (UMAE) # 71, Instituto Mexicano del Seguro Social (IMSS), Torreón, Coahuila, Mexico
| | | | - Isis Goné-Vázquez
- Histocompatibility Laboratory, Hospital de Especialidades, Centro Médico Nacional de Occidente (CMNO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara, Jalisco, Mexico
| | - Gamaliel Benítez-Arvizu
- HLA Laboratory, Central Blood Bank, Hospital de Especialidades, Unidad Médica de Alta Especialidad (UMAE), Centro Médico Nacional "Siglo XXI", Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | - Francia Paulina Arellano-Prado
- Pediatrics Hospital, Centro Médico Nacional de Occidente (CMNO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara, Jalisco, Mexico
| | - Víctor Eduardo García-Arias
- Pediatrics Hospital, Centro Médico Nacional de Occidente (CMNO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara, Jalisco, Mexico
| | - Marla Estefanía Rodríguez-López
- Pediatrics Hospital, Centro Médico Nacional de Occidente (CMNO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara, Jalisco, Mexico
| | - Patricia Méndez-Mani
- Histocompatibility Laboratory, Unidad Médica de Alta Especialidad (UMAE) # 6, Instituto Mexicano del Seguro Social (IMSS), Puebla, Puebla, Mexico
| | - Raquel García-Álvarez
- Pharmacology Laboratory, Research Unit, Instituto Nacional de Pediatría (INP), Mexico City, Mexico
| | | | - Guadalupe Aquino-Rubio
- Molecular Biology Laboratory, Hospital General "Norberto Treviño Zapata", Dirección de Servicios de Salud de Tamaulipas, Ciudad Victoria, Tamaulipas, Mexico
| | - Néstor Escareño-Montiel
- Department of Transplantation, Unidad Médica de Alta Especialidad (UMAE) # 71, Instituto Mexicano del Seguro Social (IMSS), Torreón, Coahuila, Mexico
| | | | - María Guadalupe Uribe-Duarte
- Clinical Laboratory, Unidad Médica de Alta Especialidad (UMAE) # 2, Instituto Mexicano del Seguro Social (IMSS), Ciudad Obregón, Sonora, Mexico
| | - María de Jesús Ruíz-Corral
- Clinical Laboratory, Unidad Médica de Alta Especialidad (UMAE) # 2, Instituto Mexicano del Seguro Social (IMSS), Ciudad Obregón, Sonora, Mexico
| | - Andrea Ortega-Yáñez
- Department of Development Genetics and Molecular Physiology, Instituto de Biotecnología (IBT), Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Morelos, Mexico
| | | | - Benjamín Gómez-Navarro
- Central Office of Nephrology, Centro Médico Nacional de Occidente (CMNO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara, Jalisco, Mexico
| | - Agustín Jericó Arriaga-Perea
- Histocompatibility Laboratory, Central Blood Bank, Centro Médico Nacional "La Raza", Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | | | - Rosa María Macías-Medrano
- Histocompatibility Laboratory, Central Blood Bank, Centro Médico Nacional "La Raza", Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | - Jesús Abraham Aguilar-Campos
- Clinical Laboratory, Unidad Médica de Alta Especialidad (UMAE) # 2, Instituto Mexicano del Seguro Social (IMSS), Ciudad Obregón, Sonora, Mexico
| | - Raúl Solís-Martínez
- Department of Molecular Biology, Laboratorios Diagnóstica, Villahermosa, Tabasco, Mexico
| | - Ricardo Serrano-Osuna
- Clinical Laboratory, Unidad Médica de Alta Especialidad (UMAE) # 2, Instituto Mexicano del Seguro Social (IMSS), Ciudad Obregón, Sonora, Mexico
| | - Mario J Sandoval-Sandoval
- Central Office of Transplantation, Centro Médico Nacional de Occidente (CMNO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara, Jalisco, Mexico; Health Research Division, Unidad Médica de Alta Especialidad (UMAE) # 71, Instituto Mexicano del Seguro Social (IMSS), Torreón, Coahuila, Mexico
| | - Yolanda Jaramillo-Rodríguez
- Direction of Health Education and Research, Unidad Médica de Alta Especialidad (UMAE) # 71, Instituto Mexicano del Seguro Social (IMSS), Torreón, Coahuila, Mexico
| | - Antonio Salgado-Adame
- Direction of Health Education and Research, Unidad Médica de Alta Especialidad (UMAE) # 71, Instituto Mexicano del Seguro Social (IMSS), Torreón, Coahuila, Mexico
| | - Federico Juárez-de la Cruz
- Department of Transplantation, Unidad Médica de Alta Especialidad (UMAE) # 71, Instituto Mexicano del Seguro Social (IMSS), Torreón, Coahuila, Mexico
| | - Bárbara Novelo-Garza
- Medical Infrastructure Planning Committee, Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | - María de Los Ángeles Pavón-Vargas
- Histocompatibility Laboratory, Unidad Médica de Alta Especialidad (UMAE) # 6, Instituto Mexicano del Seguro Social (IMSS), Puebla, Puebla, Mexico
| | - Norma Salgado-Galicia
- Molecular Biology and Histocompatibility Laboratory, Hospital Central Sur de Alta Especialidad, Petróleos Mexicanos (PEMEX), Mexico City, Mexico
| | - Maria Cátira Bortolini
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Carla Gallo
- Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Gabriel Bedoya
- Genética Molecular (GENMOL, Universidad de Antioquia, Medellín, Colombia
| | - Francisco Rothhammer
- Programa de Genética Humana, ICBM, Facultad de Medicina, Universidad de Chile, Santiago, Chile; Instituto de Alta Investigación, Universidad de Tarapacá, Arica, Chile
| | - Rolando González-José
- Instituto Patagónico de Ciencias Sociales y Humanas-Centro Nacional Patagónico, CONICET, Puerto Madryn, Argentina
| | - Andrés Ruiz-Linares
- Ministry of Education Key Laboratory of Contemporary Anthropology and Collaborative Innovation Center of Genetics and Development, Fudan University, Shanghai, China; Aix-Marseille Univ, CNRS, EFS, ADES, Marseille, France
| | - Samuel Canizales-Quinteros
- Unidad de Genómica de Poblaciones Aplicada a la Salud, Facultad de Química, Universidad Nacional Autónoma de México e Instituto Nacional de Medicina Genómica, Mexico City, Mexico
| | - Sandra Romero-Hidalgo
- Department of Computational Genomics, Instituto Nacional de Medicina Genómica (INMEGEN), Mexico City, Mexico
| | - Johannes Krause
- Department of Archaeogenetics, Max Planck Institute for the Science of Human History (MPI-SHH), Jena, Germany
| | - Joaquín Zúñiga
- Laboratory of Immunobiology and Genetics, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico City, Mexico; Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Mexico City, Mexico
| | - Edmond J Yunis
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Carolina Bekker-Méndez
- Immunology and Infectology Research Unit, Infectology Hospital, Centro Médico Nacional "La Raza", Instituto Mexicano del Seguro Social (IMSS), Mexico City, Mexico
| | - Julio Granados
- Department of Transplantation, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán" (INCMNSZ), Mexico City, Mexico.
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Differential admixture, human leukocyte antigen diversity, and hematopoietic cell transplantation in Latin America: challenges and opportunities. Bone Marrow Transplant 2019; 55:496-504. [DOI: 10.1038/s41409-019-0737-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 10/21/2019] [Accepted: 10/22/2019] [Indexed: 12/31/2022]
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KIR/HLA Gene Profile Implication in Systemic Sclerosis Patients from Mexico. J Immunol Res 2019; 2019:6808061. [PMID: 30723749 PMCID: PMC6339729 DOI: 10.1155/2019/6808061] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 11/01/2018] [Accepted: 11/15/2018] [Indexed: 12/15/2022] Open
Abstract
Introduction Systemic Sclerosis (SSc) is an autoimmune, inflammatory, and multisystemic disease characterized by the presence of autoantibodies and fibrosis. The pathogenesis involves the interaction between immune system cells such as macrophages, NK cells, T cells, and B cells. Killer-cell Immunoglobulin-like Receptors (KIR) are expressed in NK cells and some T cell subsets that recognize HLA class I molecules as ligands and are involved in regulating the activation and inhibition of these cells. The KIR family consists of 14 genes and two pseudogenes; according to the gene content, the genotype could be AA and Bx. The aim of this study was to evaluate the association between KIR/HLA genes and genotypes with SSc and the clinical characteristics. Methods We included 50 SSc patients and 90 Control Subjects (CS). Genotyping of KIR, HLA-C, -Bw4, and -A∗03/∗11 was made by SSP-PCR. Results In SSc patients, a higher frequency of KIR2DL2 (p = 0.0007, p′ = 0.011), KIR2DS4del (p = 0.001, p′ = 0.021), and HLA-C2 (p = 0.02, p′ = 0.09) was found. This is the first study to evaluate the frequency of HLA-A∗03/∗11 in SSc patients, of which a low frequency was found in both groups. Compound genotypes KIR2DL2+/HLA-C1+ or KIR2DL2+/HLA-C2+ have a higher frequency in SSc patients. The Bx genotype was the most frequent and was associated with risk to SSc (p = 0.007, OR = 3.1, 95% CI = 1.4–7.9, p′ = 0.014). The genotypes with a higher iKIR number than aKIR (iKIR > aKIR) were found in all individuals; genotypes with 7-8 iKIR genes were increased in SSc patients. We do not find an association between the KIR genes with the clinical characteristics. Conclusion The results suggest that KIR2DL2 and 2DS4del could have a risk role in the development of SSc, but not with clinical manifestations.
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Uscanga L. Answer to Mejía-Leon ME and Calderón de la Barca AM. Prevalence of the HLA-DQ2 and DQ8 haplotypes that predispose to celiac disease in Mexico. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2019; 84:124-125. [PMID: 30591197 DOI: 10.1016/j.rgmx.2018.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 08/14/2018] [Indexed: 06/09/2023]
Affiliation(s)
- L Uscanga
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Ciudad de México, México.
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Answer to Mejía-Leon ME and Calderón de la Barca AM. Prevalence of the HLA-DQ2 and DQ8 haplotypes that predispose to celiac disease in Mexico. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2019. [DOI: 10.1016/j.rgmxen.2018.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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13
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Segovia-Gamboa NC, Rodríguez-Arellano ME, Muñoz-Solís A, Retana-Jiménez JE, Vargas-Ayala G, Granados J, Jiménez-Sánchez M, Sanchez-Torres C. High prevalence of humoral autoimmunity in first-degree relatives of Mexican type 1 diabetes patients. Acta Diabetol 2018; 55:1275-1282. [PMID: 30306407 DOI: 10.1007/s00592-018-1241-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 10/03/2018] [Indexed: 01/01/2023]
Abstract
AIMS To assess the prevalence of autoantibodies (Aab) to insulin (IAA), glutamic acid decarboxylase 65 (GADA) and insulinoma antigen 2 (IA-2A), as well as human leukocyte antigen (HLA) class II alleles, in first degree relatives (FDR) of Mexican patients with type 1 diabetes (T1D), and to explore whether these parameters mirror the low incidence of T1D in the Mexican population. METHODS Aab titers were determined by ELISA in 425 FDR, 234 siblings, 40 offspring and 151 parents of 197 patients with T1D. Typing of HLA-DR and -DQ alleles was performed in 41 Aab-positive FDR using polymerase chain reaction with allele-specific oligotyping. RESULTS Seventy FDR (16.47%) tested positive for Aab. The siblings (19.2%) and the offspring (25%) had significantly higher prevalence of Aab than the parents (9.9%). GADA was the most frequent Aab. Almost half of the Aab-positive FDR had two different Aab (45.7%), and none tested positive for three Aab. The highest prevalence of Aab was found among women in the 15-29 years age group. Moreover, the positivity for two Aab was significantly more frequent among females. A considerable number of FDR (48.8%) carried the susceptible HLA-DR3, -DR4, -DQB1*0201 or -DQB1*0302 alleles, but almost none had the high risk genotype HLA-DR3/DR4. CONCLUSIONS FDR of Mexican T1D patients have high prevalence of islet Aab, comparable to countries with the highest incidence of T1D. However, Aab positivity does not seem to be associated with HLA risk genotypes, which may have an impact on the low incidence of T1D in Mexico.
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Affiliation(s)
- Norma C Segovia-Gamboa
- Department of Molecular Biomedicine, Centro de Investigación y de Estudios Avanzados del I.P.N. (CINVESTAV-IPN), Av. I.P.N. 2508, San Pedro Zacatenco, 07360, Mexico City, Mexico
| | - Martha E Rodríguez-Arellano
- Research Department, Hospital Regional "Licenciado Adolfo López Mateos", ISSSTE, Av. Universidad 1321, Florida, 01030, Mexico City, Mexico
| | - Andrés Muñoz-Solís
- Endocrinology Department, Hospital de Especialidades "Antonio Fraga Mouret", Centro Médico nacional "La Raza" (IMSS), Paseo de las Jacarandas S/N, Atzcapotzalco, 02990, Mexico City, Mexico
| | - Jorge E Retana-Jiménez
- Pediatrics Department, Hospital Regional "Licenciado Adolfo López Mateos", ISSSTE, Av. Universidad 1321, Florida, 01030, Mexico City, Mexico
| | - Germán Vargas-Ayala
- Department of Internal Medicine, Ticoman General Hospital, Plan de San Luis S/N, La Purísima Ticoman, 07330, Mexico City, Mexico
| | - Julio Granados
- Division of Immunogenetics, Department of Transplantation, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Vasco de Quiroga 15, Tlalpan, 14080, Mexico City, Mexico
| | - Marisela Jiménez-Sánchez
- Endocrinology Department, Hospital de Especialidades "Antonio Fraga Mouret", Centro Médico nacional "La Raza" (IMSS), Paseo de las Jacarandas S/N, Atzcapotzalco, 02990, Mexico City, Mexico
| | - Carmen Sanchez-Torres
- Department of Molecular Biomedicine, Centro de Investigación y de Estudios Avanzados del I.P.N. (CINVESTAV-IPN), Av. I.P.N. 2508, San Pedro Zacatenco, 07360, Mexico City, Mexico.
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Clinical guidelines on the diagnosis and treatment of celiac disease in Mexico. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2018. [DOI: 10.1016/j.rgmxen.2018.09.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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15
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Remes-Troche JM, Uscanga-Domínguez LF, Aceves-Tavares RG, Calderón de la Barca AM, Carmona-Sánchez RI, Cerda-Contreras E, Coss-Adame E, Icaza-Chávez ME, Lopéz-Colombo A, Milke-García MP, Morales-Arámbula M, Peláez-Luna M, Ramos Martínez P, Sánchez-Sosa S, Treviño-Mejía MC, Vázquez-Frías R, Worona-Dibner LB, Zamora-Nava LE, Rubio-Tapia A. Clinical guidelines on the diagnosis and treatment of celiac disease in Mexico. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2018; 83:434-450. [PMID: 30197183 DOI: 10.1016/j.rgmx.2018.05.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/12/2018] [Accepted: 05/24/2018] [Indexed: 12/17/2022]
Abstract
Celiac disease, celiac sprue, or gluten-sensitive enteropathy, is a generalized autoimmune disease characterized by chronic inflammation and atrophy of the small bowel mucosa. It is caused by dietary exposure to gluten and affects genetically predisposed individuals. In Mexico, at least 800,000 are estimated to possibly have the disease, prompting the Asociación Mexicana de Gastroenterología to summon a multidisciplinary group of experts to develop the "Clinical guidelines on the diagnosis and treatment of celiac disease in Mexico" and establish recommendations for the medical community, its patients, and the general population. The participating medical professionals were divided into three working groups and were given the selected bibliographic material by the coordinators (ART, LUD, JMRT), who proposed the statements that were discussed and voted upon in three sessions: two voting rounds were carried out electronically and one at a face-to-face meeting. Thirty-nine statements were accepted, and once approved, were developed and revised by the coordinators, and their final version was approved by all the participants. It was emphasized in the document that epidemiology and risk factors associated with celiac disease (first-degree relatives, autoimmune diseases, high-risk populations) in Mexico are similar to those described in other parts of the world. Standards for diagnosing the disease and its appropriate treatment in the Mexican patient were established. The guidelines also highlighted the fact that a strict gluten-free diet is essential only in persons with confirmed celiac disease, and that the role of gluten is still a subject of debate in relation to nonceliac, gluten-sensitive patients.
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Affiliation(s)
- J M Remes-Troche
- Laboratorio de Fisiología Digestiva y Motilidad Gastrointestinal, Instituto de Investigaciones Médico Biológicas, Universidad Veracruzana, Veracruz, México.
| | - L F Uscanga-Domínguez
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Ciudad de México, México
| | - R G Aceves-Tavares
- Servicio de Gastroenterología, Hospital General del Estado Dr. Ernesto Ramos, Bours, Hermosillo, Sonora, México
| | | | | | - E Cerda-Contreras
- ITESM. Medicina Interna y Gastroenterología Fundación Clínica Médica Sur, Ciudad de México, México
| | - E Coss-Adame
- Departamento de Gastroenterología y Laboratorio de Motilidad Gastrointestinal, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán , Ciudad de México, México
| | - M E Icaza-Chávez
- Hospital Star Médica de Mérida, Gastroenterología de la UNIMAYAB, , Mérida, Yucatán, México
| | - A Lopéz-Colombo
- Dirección de Educación e Investigación en Salud, UMAE Hospital de Especialidades del Centro Médico Nacional Manuel Ávila Camacho, Instituto Mexicano del Seguro Social, Puebla, México
| | - M P Milke-García
- Dirección de Nutrición, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán , Ciudad de México, México
| | - M Morales-Arámbula
- Servicio de Gastroenterología y Endoscopía Gastrointestinal, Hospital Country 2000, Guadalajara, Jalisco, México
| | - M Peláez-Luna
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Ciudad de México, México
| | | | - S Sánchez-Sosa
- Jefe de Patología, Hospital Ángeles de Puebla, Universidad de Las Américas Puebla (UDLAP), Puebla, México
| | - M C Treviño-Mejía
- Universidad Iberoamericana, Universidad Xochicalco, Tijuana, Baja California, México
| | - R Vázquez-Frías
- Universidad Iberoamericana, Universidad Xochicalco, Tijuana, Baja California, México
| | - L B Worona-Dibner
- Departamento de Gastroenterología y Nutrición, Hospital Infantil de México Federico Gómez, Ciudad de México, México
| | - L E Zamora-Nava
- Departamento de Endoscopia Gastrointestinal, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Ciudad de México, México
| | - A Rubio-Tapia
- División de Gastroenterología y Hepatología, Mayo Clinic, Rochester, Minnesota, Estados Unidos de América
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Cerda-Contreras E, Ramírez-Cervantes K, Granados J, Mena L, Núñez-Álvarez C, Uscanga L. Is celiac disease better identified through HLA-DQ8 than through HLA-DQ2 in Mexican subjects? REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2018. [DOI: 10.1016/j.rgmxen.2018.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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An original Eurasian haplotype, HLA-DRB1*14:54-DQB1*05:03, influences the susceptibility to idiopathic achalasia. PLoS One 2018; 13:e0201676. [PMID: 30092016 PMCID: PMC6084941 DOI: 10.1371/journal.pone.0201676] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 07/19/2018] [Indexed: 01/04/2023] Open
Abstract
Idiopathic achalasia is a relatively infrequent esophageal motor disorder for which major histocompatibility complex (MHC) genes are well-identified risk factors. However, no information about HLA-achalasia susceptibility in Mexicans has previously been reported. We studied a group of 91 patients diagnosed with achalasia and 234 healthy controls with Mexican admixed ancestry. HLA alleles and conserved extended haplotypes were analyzed using high-resolution HLA typing based on Sanger and next-generation sequencing technologies. Admixture estimates were determined using HLA-B and short tandem repeats. Results were analyzed by non-parametric statistical analysis and Bonferroni correction. P-values < 0.05 were considered significant. Patients with achalasia had 56.7% Native American genes, 24.7% European genes, 16.5% African genes and 2.0% Asian genes, which was comparable with the estimates in the controls. Significant increases in the frequencies of alleles DRB1*14:54 and DQB1*05:03 and the extended haplotypes DRB1*14:54-DQB1*05:03 and DRB1*11:01-DQB1*03:01, even after Bonferroni correction (pC<0.05), were found in the achalasia group compared to those in the controls. Concluding, the HLA class II alleles HLA-DRB1*14:54:01 and DQB1*05:03:01 and the extended haplotype are risk factors for achalasia in mixed-ancestry Mexican individuals. These results also suggest that the HLA-DRB1*14:54-DQB1*05:03 haplotype was introduced by admixture with European and/or Asian populations.
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Is celiac disease better identified through HLA-DQ8 than through HLA-DQ2 in Mexican subjects? REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2018; 83:410-413. [PMID: 29753576 DOI: 10.1016/j.rgmx.2018.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 01/03/2018] [Accepted: 01/25/2018] [Indexed: 12/20/2022]
Abstract
INTRODUCTION AND AIMS A strong genetic association between celiac disease (CD) and the human leukocyte antigen (HLA) has been widely demonstrated. In Europe, the HLA-DQ2 allele is predominant. However, studies in Latin America indicate that HLA-DQ8 could be more frequent. In Mexico, the frequency of those alleles has not been reported in subjects with CD. Therefore, the aim of the present study was to evaluate the distribution of HLA-DQ2 and HLA-DQ8 in Mexican individuals with CD. MATERIAL AND METHODS An exploratory study was conducted on a cohort of 49 subjects with chronic diarrhea. Autoantibodies for CD, duodenal atrophy, and HLA haplotypes were determined. RESULTS Thirty individuals had CD (23 women, mean age 54.2 ± 15.5 years), 24 (80%) of whom expressed HLA-DQ8, 15 (50%) expressed HLA-DQ2, and 11 (37%) presented with both alleles. However, neither the HLA-DQ2 nor the HLA-DQ8 allele was found in 5 (10%) individuals. In subjects with chronic diarrhea that did not have CD, 12 (63%) presented with HLA-DQ2, and 7 (37%) with HLA-DQ8. Individuals with CD expressed the combinations of the HLA-DQ8/DQ2 alleles (37 vs. 5%) and the HLA-DR4/DQ8 alleles (60 vs. 26%) more frequently than the subjects without CD. CONCLUSIONS In Mexican subjects with CD, HLA-DQ8 distribution was more frequent than that of HLA-DQ2, indicating a possible similarity to the frequency reported in other Latin American countries. However, given the nature of the present study and its sample size, further conclusions could not be reached.
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Blood Groups Distribution and Gene Diversity of the ABO and Rh (D) Loci in the Mexican Population. BIOMED RESEARCH INTERNATIONAL 2018; 2018:1925619. [PMID: 29850485 PMCID: PMC5937518 DOI: 10.1155/2018/1925619] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 03/05/2018] [Indexed: 02/06/2023]
Abstract
Objective To determine the frequency and distribution of ABO and Rh (D) antigens and, additionally, investigate gene diversity and the structure of Mexican populations. Materials and Methods Blood groups were tested in 271,164 subjects from 2014 to 2016. The ABO blood group was determined by agglutination using the antibodies anti-A, Anti-B, and Anti-D for the Rh factor, respectively. Results The overall distribution of ABO and Rh (D) groups in the population studied was as follows: O: 61.82%; A: 27.44%; B: 8.93%; and AB: 1.81%. For the Rh group, 95.58% of people were Rh (D), and 4.42% were Rh (d). Different distributions of blood groups across regions were found; additionally, genetic analysis revealed that the IO and ID allele showed an increasing trend from the north to the center, while the IA and Id allele tended to increase from the center to the north. Also, we found more gene diversity in both loci in the north compared with the center, suggesting population structure in Mexico. Conclusion This work could help health institutions to identify where they can obtain blood products necessary for medical interventions. Moreover, this piece of information contributes to the knowledge of the genetic structure of the Mexican populations which could have significant implications in different fields of biomedicine.
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Valenzuela-Ponce H, Alva-Hernández S, Garrido-Rodríguez D, Soto-Nava M, García-Téllez T, Escamilla-Gómez T, García-Morales C, Quiroz-Morales VS, Tapia-Trejo D, Del Arenal-Sánchez S, Prado-Galbarro FJ, Hernández-Juan R, Rodríguez-Aguirre E, Murakami-Ogasawara A, Mejía-Villatoro C, Escobar-Urias IY, Pinzón-Meza R, Pascale JM, Zaldivar Y, Porras-Cortés G, Quant-Durán C, Lorenzana I, Meza RI, Palou EY, Manzanero M, Cedillos RA, Aláez C, Brockman MA, Harrigan PR, Brumme CJ, Brumme ZL, Ávila-Ríos S, Reyes-Terán G. Novel HLA class I associations with HIV-1 control in a unique genetically admixed population. Sci Rep 2018; 8:6111. [PMID: 29666450 PMCID: PMC5904102 DOI: 10.1038/s41598-018-23849-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 03/21/2018] [Indexed: 12/26/2022] Open
Abstract
Associations between HLA class I alleles and HIV progression in populations exhibiting Amerindian and Caucasian genetic admixture remain understudied. Using univariable and multivariable analyses we evaluated HLA associations with five HIV clinical parameters in 3,213 HIV clade B-infected, ART-naïve individuals from Mexico and Central America (MEX/CAM cohort). A Canadian cohort (HOMER, n = 1622) was used for comparison. As expected, HLA allele frequencies in MEX/CAM and HOMER differed markedly. In MEX/CAM, 13 HLA-A, 24 HLA-B, and 14 HLA-C alleles were significantly associated with at least one clinical parameter. These included previously described protective (e.g. B*27:05, B*57:01/02/03 and B*58:01) and risk (e.g. B*35:02) alleles, as well as novel ones (e.g. A*03:01, B*15:39 and B*39:02 identified as protective, and A*68:03/05, B*15:30, B*35:12/14, B*39:01/06, B*39:05~C*07:02, and B*40:01~C*03:04 identified as risk). Interestingly, both protective (e.g. B*39:02) and risk (e.g. B*39:01/05/06) subtypes were identified within the common and genetically diverse HLA-B*39 allele group, characteristic to Amerindian populations. While HLA-HIV associations identified in MEX and CAM separately were similar overall (Spearman's rho = 0.33, p = 0.03), region-specific associations were also noted. The identification of both canonical and novel HLA/HIV associations provides a first step towards improved understanding of HIV immune control among unique and understudied Mestizo populations.
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Affiliation(s)
- Humberto Valenzuela-Ponce
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico
| | - Selma Alva-Hernández
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico
| | - Daniela Garrido-Rodríguez
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico
| | - Maribel Soto-Nava
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico
| | - Thalía García-Téllez
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico.,Institut Pasteur, Unité HIV, Inflammation and Persistence, Paris, France
| | - Tania Escamilla-Gómez
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico
| | - Claudia García-Morales
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico
| | | | - Daniela Tapia-Trejo
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico
| | - Silvia Del Arenal-Sánchez
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico
| | | | - Ramón Hernández-Juan
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico
| | - Edna Rodríguez-Aguirre
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico
| | - Akio Murakami-Ogasawara
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico
| | | | | | | | | | - Yamitzel Zaldivar
- Instituto Conmemorativo Gorgas de Estudios de la Salud, Panama City, Panama
| | | | | | - Ivette Lorenzana
- Universidad Nacional Autónoma de Honduras, Tegucigalpa, Honduras
| | - Rita I Meza
- Honduras HIV National Laboratory, Tegucigalpa, Honduras
| | - Elsa Y Palou
- Hospital Escuela Universitario, Tegucigalpa, Honduras
| | | | | | - Carmen Aláez
- National Institute of Genomic Medicine, Translational Medicine Laboratory, Mexico City, Mexico
| | - Mark A Brockman
- Simon Fraser University, Faculty of Health Sciences, Burnaby, Canada.,British Columbia Centre for Excellence in HIV/AIDS, Vancouver, Canada
| | | | - Chanson J Brumme
- British Columbia Centre for Excellence in HIV/AIDS, Vancouver, Canada
| | - Zabrina L Brumme
- Simon Fraser University, Faculty of Health Sciences, Burnaby, Canada.,British Columbia Centre for Excellence in HIV/AIDS, Vancouver, Canada
| | - Santiago Ávila-Ríos
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico.
| | - Gustavo Reyes-Terán
- National Institute of Respiratory Diseases, CIENI Center for Research in Infectious Diseases, Mexico City, Mexico.
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Fricke-Galindo I, Jung-Cook H, LLerena A, López-López M. Pharmacogenetics of adverse reactions to antiepileptic drugs. NEUROLOGÍA (ENGLISH EDITION) 2018. [DOI: 10.1016/j.nrleng.2015.03.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Remes-Troche JM. Doctor, why am I a celiac if I'm Mexican? Breaking another paradigm of celiac disease in Mexico. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2018; 83:77-78. [PMID: 29669696 DOI: 10.1016/j.rgmx.2018.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Accepted: 03/12/2018] [Indexed: 06/08/2023]
Affiliation(s)
- J M Remes-Troche
- Laboratorio de Fisiología Digestiva y Motilidad Gastrointestinal, Instituto de Investigaciones Médico-Biológicas, Universidad Veracruzana, Veracruz, México.
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Remes-Troche J. Doctor, why am I a celiac if I’m Mexican? Breaking another paradigm of celiac disease in Mexico. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2018. [DOI: 10.1016/j.rgmxen.2018.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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Weaker HLA Footprints on HIV in the Unique and Highly Genetically Admixed Host Population of Mexico. J Virol 2018; 92:JVI.01128-17. [PMID: 29093100 PMCID: PMC5752930 DOI: 10.1128/jvi.01128-17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 10/27/2017] [Indexed: 01/24/2023] Open
Abstract
HIV circumvents HLA class I-restricted CD8+ T-cell responses through selection of escape mutations that leave characteristic mutational “footprints,” also known as HLA-associated polymorphisms (HAPs), on HIV sequences at the population level. While many HLA footprints are universal across HIV subtypes and human populations, others can be region specific as a result of the unique immunogenetic background of each host population. Using a published probabilistic phylogenetically informed model, we compared HAPs in HIV Gag and Pol (PR-RT) in 1,612 subtype B-infected, antiretroviral treatment-naive individuals from Mexico and 1,641 individuals from Canada/United States. A total of 252 HLA class I allele subtypes were represented, including 140 observed in both cohorts, 67 unique to Mexico, and 45 unique to Canada/United States. At the predefined statistical threshold of a q value of <0.2, 358 HAPs (201 in Gag, 157 in PR-RT) were identified in Mexico, while 905 (534 in Gag and 371 in PR-RT) were identified in Canada/United States. HAPs identified in Mexico included both canonical HLA-associated escape pathways and novel associations, in particular with HLA alleles enriched in Amerindian and mestizo populations. Remarkably, HLA footprints on HIV in Mexico were not only fewer but also, on average, significantly weaker than those in Canada/United States, although some exceptions were noted. Moreover, exploratory analyses suggested that the weaker HLA footprint on HIV in Mexico may be due, at least in part, to weaker and/or less reproducible HLA-mediated immune pressures on HIV in this population. The implications of these differences for natural and vaccine-induced anti-HIV immunity merit further investigation. IMPORTANCE HLA footprints on HIV identify viral regions under intense and consistent pressure by HLA-restricted immune responses and the common mutational pathways that HIV uses to evade them. In particular, HLA footprints can identify novel immunogenic regions and/or epitopes targeted by understudied HLA alleles; moreover, comparative analyses across immunogenetically distinct populations can illuminate the extent to which HIV immunogenic regions and escape pathways are shared versus population-specific pathways, information which can in turn inform the design of universal or geographically tailored HIV vaccines. We compared HLA-associated footprints on HIV in two immunogenetically distinct North American populations, those of Mexico and Canada/United States. We identify both shared and population-specific pathways of HIV adaptation but also make the surprising observation that HLA footprints on HIV in Mexico overall are fewer and weaker than those in Canada/United States, raising the possibility that HLA-restricted antiviral immune responses in Mexico are weaker, and/or escape pathways somewhat less consistent, than those in other populations.
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Amezcua L. MS in self-identified Hispanic/Latino individuals living in the US. Mult Scler J Exp Transl Clin 2017; 3:2055217317725103. [PMID: 28979795 PMCID: PMC5617095 DOI: 10.1177/2055217317725103] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Accepted: 07/07/2017] [Indexed: 12/26/2022] Open
Abstract
Self-identified Hispanic/Latino individuals living with multiple sclerosis (MS) in the continental United States (US) are a diverse group that represents different cultural and ancestral backgrounds. A marked variability in the way MS affects various subgroups of Hispanics in the US has been observed. We reviewed and synthesized available data about MS in Hispanics in the US. There are likely a host of multifactorial elements contributing to these observations that could be explained by genetic, environmental, and social underpinnings. Barriers to adequate MS care in Hispanics are likely to include delivery of culturally competent care and social and economic disadvantages. Considerable efforts, including the formation of a national consortium known as the Alliance for Research in Hispanic Multiple Sclerosis (ARHMS), are underway to help further explore these various factors.
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Affiliation(s)
- Lilyana Amezcua
- Department of Neurology, University of Southern California, Keck School of Medicine, USA
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Genetic diversity of Umbilical Cord Blood Units for transplant of the National Center of Blood Transfusion (Mexico). REVISTA MÉDICA DEL HOSPITAL GENERAL DE MÉXICO 2017. [DOI: 10.1016/j.hgmx.2016.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Fricke-Galindo I, Ortega-Vázquez A, Monroy-Jaramillo N, Dorado P, Jung-Cook H, Peñas-Lledó E, LLerena A, López-López M. Allele and genotype frequencies of genes relevant to anti-epileptic drug therapy in Mexican-Mestizo healthy volunteers. Pharmacogenomics 2016; 17:1913-1930. [PMID: 27790929 DOI: 10.2217/pgs-2016-0078] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
AIM To determine allele and genotype frequencies of genes influencing anti-epileptic drug therapy in Mexican-Mestizo (MM) healthy volunteers, and to evaluate whether these are different from those reported for other populations. SUBJECTS & METHODS Thirty-nine variants of CYP3A5, EPHX1, NR1I2, HNF4A, UGT1A1, UGT2B7, ABCC2, RALBP1, SCN1A, SCN2A and GABRA1 were genotyped in 300 MM healthy volunteers. RESULTS All studied alleles were presented in MM, except for seven UGT1A1 variants (*6-8, 14, 15, 27 and 29). Allele and genotype frequencies showed interethnic variations when compared with European, Asian and African populations. Allele frequencies of greater than 30% were observed in ten genes. CONCLUSION The results presented regarding the frequencies and interethnic differences of these polymorphisms should be taken into account for future pharmacogenetic studies of anti-epileptic drugs in MM patients with epilepsy.
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Affiliation(s)
- Ingrid Fricke-Galindo
- Doctorate in Biological & Health Sciences, Metropolitan Autonomous University, Campus Xochimilco, Mexico City, Mexico
| | - Alberto Ortega-Vázquez
- Department of Biological Systems, Metropolitan Autonomous University, Campus Xochimilco, Mexico City, Mexico
| | - Nancy Monroy-Jaramillo
- Department of Neurogenetics & Molecular Biology, National Institute of Neurology & Neurosurgery Manuel Velasco Suárez, Mexico City, Mexico
| | - Pedro Dorado
- CICAB Clinical Research Centre, Extremadura University Hospital & Medical School, Servicio Extremeño de Salud, Badajoz, Spain
| | - Helgi Jung-Cook
- Department of Pharmacy, Chemistry Faculty, National Autonomous University of Mexico, Mexico City, Mexico.,Department of Neuropharmacology, National Institute of Neurology & Neurosurgery Manuel Velasco Suárez, Mexico City, Mexico
| | - Eva Peñas-Lledó
- CICAB Clinical Research Centre, Extremadura University Hospital & Medical School, Servicio Extremeño de Salud, Badajoz, Spain
| | - Adrián LLerena
- CICAB Clinical Research Centre, Extremadura University Hospital & Medical School, Servicio Extremeño de Salud, Badajoz, Spain
| | - Marisol López-López
- Department of Biological Systems, Metropolitan Autonomous University, Campus Xochimilco, Mexico City, Mexico
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Mendoza-Carrera F, Castro-Martínez XH, Leal C, Portilla-de Buen E, Sánchez-Corona J, Flores-Martínez SE, García-Zapién A, Ramírez-López G, Gómez-Espinel I, Báez-Duarte BG, Zamora-Ginez I, Velarde-Félix JS, Guillermo Sánchez-Zazueta J. Analysis of cytokine gene polymorphisms in Mestizo and native populations from Mexico. Am J Hum Biol 2016; 29. [DOI: 10.1002/ajhb.22900] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 06/28/2016] [Accepted: 07/11/2016] [Indexed: 12/28/2022] Open
Affiliation(s)
- Francisco Mendoza-Carrera
- Molecular Medicine Division, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social (CIBO-IMSS); Guadalajara Jal. México
| | - Xochitl Helga Castro-Martínez
- Molecular Medicine Division, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social (CIBO-IMSS); Guadalajara Jal. México
| | - Caridad Leal
- Surgical Research Division; CIBO-IMSS; Guadalajara Jal. México
| | | | - José Sánchez-Corona
- Molecular Medicine Division, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social (CIBO-IMSS); Guadalajara Jal. México
| | - Silvia Esperanza Flores-Martínez
- Molecular Medicine Division, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social (CIBO-IMSS); Guadalajara Jal. México
| | - Alejandra García-Zapién
- Molecular Medicine Division, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social (CIBO-IMSS); Guadalajara Jal. México
| | - Guadalupe Ramírez-López
- Unidad de Investigación Epidemiológica y en Servicios de Salud del Adolescente, IMSS; Tonalá Jal. México
| | - Irene Gómez-Espinel
- Departamento de Patología Clínica; Facultad de Medicina, Universidad Autónoma de Nuevo León; Monterrey N.L México
| | | | - Irma Zamora-Ginez
- Facultad de Medicina, Benemérita Universidad Autónoma de Puebla; Puebla Pue México
| | - Jesús Salvador Velarde-Félix
- Cuerpo Académico Inmunogenética y Evolución UAS-CA-265, Unidad Académica Escuela de Biología, Universidad Autónoma de Sinaloa; Culiacán Sin México
| | - Jorge Guillermo Sánchez-Zazueta
- Cuerpo Académico Inmunogenética y Evolución UAS-CA-265, Unidad Académica Escuela de Biología, Universidad Autónoma de Sinaloa; Culiacán Sin México
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Garrido-Rodríguez D, Ávila-Ríos S, García-Morales C, Valenzuela-Ponce H, Ormsby C, Reyes-Gopar H, Fernandez-Lopez JC, Reyes-Terán G. Killer cell immunoglobulin-like receptor and human leukocyte antigen gene profiles in a cohort of HIV-infected Mexican Mestizos. Immunogenetics 2016; 68:703-17. [PMID: 27240860 DOI: 10.1007/s00251-016-0920-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 05/21/2016] [Indexed: 01/23/2023]
Abstract
Killer cell immunoglobulin-like receptors (KIRs) represent the most polymorphic genes responsible for natural killer cell function, while human leukocyte antigen (HLA) class I molecules define and restrict cytotoxic T lymphocyte responses. Specific KIR, HLA, or KIR-HLA combinations have been implicated in the outcome of human immunodeficiency virus (HIV) disease. The remarkable polymorphism of KIR and HLA genes warrants descriptive gene frequency studies in different populations, as well as their impact on HIV disease progression in different immunogenetic contexts. We report KIR and HLA class I gene profiles of 511 unrelated HIV-infected Mexican Mestizo individuals from 18 states for whom genetic ancestry proportions were assessed. KIR and HLA gene profiles were compared between individuals from the north and central-south regions of the country and between individuals with higher European (EUR) or Amerindian (AMI) genetic ancestry component. A total of 65 KIR genotypes were observed, 11 harboring novel KIR gene combinations. A total of 164 HLA alleles were observed: 43 HLA-A, 87 HLA-B, and 34 HLA-C. Differences in the distribution of 12 HLA alleles were observed between individuals with higher AMI or EUR ancestry components (p < 0.05, q < 0.2). After correcting for genetic ancestry, only individual HLA alleles were associated with HIV disease progression, including a novel association with A*02:06, an Amerindian HLA allele associated with lower CD4+ T cell counts. No KIR effects were significant. Our results highlight the advantages of considering a detailed genetic stratification within populations when studying genetic profiles that could be implicated in disease-association studies.
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Affiliation(s)
- Daniela Garrido-Rodríguez
- National Institute of Respiratory Diseases, Centre for Research in Infectious Diseases, Calzada de Tlalpan 4502, Col. Sección XVI, 14080, Mexico City, Mexico
| | - Santiago Ávila-Ríos
- National Institute of Respiratory Diseases, Centre for Research in Infectious Diseases, Calzada de Tlalpan 4502, Col. Sección XVI, 14080, Mexico City, Mexico
| | - Claudia García-Morales
- National Institute of Respiratory Diseases, Centre for Research in Infectious Diseases, Calzada de Tlalpan 4502, Col. Sección XVI, 14080, Mexico City, Mexico
| | - Humberto Valenzuela-Ponce
- National Institute of Respiratory Diseases, Centre for Research in Infectious Diseases, Calzada de Tlalpan 4502, Col. Sección XVI, 14080, Mexico City, Mexico
| | - Christopher Ormsby
- National Institute of Respiratory Diseases, Centre for Research in Infectious Diseases, Calzada de Tlalpan 4502, Col. Sección XVI, 14080, Mexico City, Mexico
| | - Helena Reyes-Gopar
- National Institute of Respiratory Diseases, Centre for Research in Infectious Diseases, Calzada de Tlalpan 4502, Col. Sección XVI, 14080, Mexico City, Mexico
| | | | - Gustavo Reyes-Terán
- National Institute of Respiratory Diseases, Centre for Research in Infectious Diseases, Calzada de Tlalpan 4502, Col. Sección XVI, 14080, Mexico City, Mexico.
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HLA Class I and II Blocks Are Associated to Susceptibility, Clinical Subtypes and Autoantibodies in Mexican Systemic Sclerosis (SSc) Patients. PLoS One 2015; 10:e0126727. [PMID: 25993664 PMCID: PMC4439150 DOI: 10.1371/journal.pone.0126727] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 04/07/2015] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Human leukocyte antigen (HLA) polymorphism studies in Systemic Sclerosis (SSc) have yielded variable results. These studies need to consider the genetic admixture of the studied population. Here we used our previously reported definition of genetic admixture of Mexicans using HLA class I and II DNA blocks to map genetic susceptibility to develop SSc and its complications. METHODS We included 159 patients from a cohort of Mexican Mestizo SSc patients. We performed clinical evaluation, obtained SSc-associated antibodies, and determined HLA class I and class II alleles using sequence-based, high-resolution techniques to evaluate the contribution of these genes to SSc susceptibility, their correlation with the clinical and autoantibody profile and the prevalence of Amerindian, Caucasian and African alleles, blocks and haplotypes in this population. RESULTS Our study revealed that class I block HLA-C*12:03-B*18:01 was important to map susceptibility to diffuse cutaneous (dc) SSc, HLA-C*07:01-B*08:01 block to map the susceptibility role of HLA-B*08:01 to develop SSc, and the C*07:02-B*39:05 and C*07:02-B*39:06 blocks to map the protective role of C*07:02 in SSc. We also confirmed previous associations of HLA-DRB1*11:04 and -DRB1*01 to susceptibility to develop SSc. Importantly, we mapped the protective role of DQB1*03:01 using three Amerindian blocks. We also found a significant association for the presence of anti-Topoisomerase I antibody with HLA-DQB1*04:02, present in an Amerindian block (DRB1*08:02-DQB1*04:02), and we found several alleles associated to internal organ damage. The admixture estimations revealed a lower proportion of the Amerindian genetic component among SSc patients. CONCLUSION This is the first report of the diversity of HLA class I and II alleles and haplotypes Mexican patients with SSc. Our findings suggest that HLA class I and class II genes contribute to the protection and susceptibility to develop SSc and its different clinical presentations as well as different autoantibody profiles in Mexicans.
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Fricke-Galindo I, Jung-Cook H, LLerena A, López-López M. Pharmacogenetics of adverse reactions to antiepileptic drugs. Neurologia 2015; 33:165-176. [PMID: 25976948 DOI: 10.1016/j.nrl.2015.03.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 10/30/2014] [Accepted: 03/04/2015] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION Adverse drug reactions (ADRs) are a major public health concern and a leading cause of morbidity and mortality in the world. In the case of antiepileptic drugs (AEDs), ADRs constitute a barrier to successful treatment since they decrease treatment adherence and impact patients' quality of life of patients. Pharmacogenetics aims to identify genetic polymorphisms associated with drug safety. This article presents a review of genes coding for drug metabolising enzymes and drug transporters, and HLA system genes that have been linked to AED-induced ADRs. DEVELOPMENT To date, several genetic variations associated with drug safety have been reported: CYP2C9*2 and *3 alleles, which code for enzymes with decreased activity, have been linked to phenytoin (PHT)-induced neurotoxicity; GSTM1 null alleles with hepatotoxicity induced by carbamazepine (CBZ) and valproic acid (VPA); EPHX1 polymorphisms with teratogenesis; ABCC2 genetic variations with CBZ- and VPA-induced neurological ADRs; and HLA alleles (e.g. HLA-B*15:02, -A*31:01, -B*15:11, -C*08:01) with cutaneous ADRs. CONCLUSIONS Published findings show that there are ADRs with a pharmacogenetic basis and a high interethnic variability, which indicates a need for future studies in different populations to gather more useful results for larger number of patients. The search for biomarkers that would allow predicting ADRs to AEDs could improve pharmacotherapy for epilepsy.
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Affiliation(s)
- I Fricke-Galindo
- Programa de Doctorado en Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana, Unidad Xochimilco, Coyoacán, México D.F. , México
| | - H Jung-Cook
- Departamento de Neuropsicofarmacología, Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, Departamento de Farmacia, Universidad Nacional Autónoma de México, Tlalpan, México D.F., México
| | - A LLerena
- CICAB Centro de Investigación Clínica, Complejo Hospitalario Universitario y Facultad de Medicina, Universidad de Extremadura, Servicio Extremeño de Salud, Badajoz, España
| | - M López-López
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana, Unidad Xochimilco, Coyoacán, México D.F., México.
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Hernández EG, Granados J, Partida-Rodríguez O, Valenzuela O, Rascón E, Magaña U, Escamilla-Tilch M, López-Reyes A, Nieves-Ramírez M, González E, Morán P, Rojas L, Valadez A, Luna A, Estrada FJ, Maldonado C, Ximénez C. Prevalent HLA Class II Alleles in Mexico City Appear to Confer Resistance to the Development of Amebic Liver Abscess. PLoS One 2015; 10:e0126195. [PMID: 25938667 PMCID: PMC4418702 DOI: 10.1371/journal.pone.0126195] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 03/30/2015] [Indexed: 11/19/2022] Open
Abstract
Amebiasis is an endemic disease and a public health problem throughout Mexico, although the incidence rates of amebic liver abscess (ALA) vary among the geographic regions of the country. Notably, incidence rates are high in the northwestern states (especially Sonora with a rate of 12.57/100,000 inhabitants) compared with the central region (Mexico City with a rate of 0.69/100,000 inhabitants). These data may be related to host genetic factors that are partially responsible for resistance or susceptibility. Therefore, we studied the association of the HLA-DRB1 and HLA-DQB1 alleles with resistance or susceptibility to ALA in two Mexican populations, one each from Mexico City and Sonora. Ninety ALA patients were clinically diagnosed by serology and sonography. Genomic DNA was extracted from peripheral blood mononuclear cells. To establish the genetic identity of both populations, 15 short tandem repeats (STRs) were analyzed with multiplexed PCR, and the allelic frequencies of HLA were studied by PCR-SSO using LUMINEX technology. The allele frequencies obtained were compared to an ethnically matched healthy control group (146 individuals). We observed that both affected populations differed genetically from the control group. We also found interesting trends in the population from Mexico City. HLA-DQB1*02 allele frequencies were higher in ALA patients compared to the control group (0.127 vs 0.047; p= 0.01; pc= NS; OR= 2.9, 95% CI= 1.09-8.3). The less frequent alleles in ALA patients were HLA-DRB1*08 (0.118 vs 0.238 in controls; p= 0.01; pc= NS; OR= 0.42, 95% CI= 0.19-0.87) and HLA-DQB1*04 (0.109 vs 0.214; p= 0.02; pc= NS; OR= 0.40, 95% CI= 0.20-0.94). The haplotype HLA-DRB1*08/-DQB1*04 also demonstrated a protective trend against the development of this disease (0.081 vs. 0.178; p=0.02; pc=NS; OR= 0.40, 95% CI= 0.16-0.93). These trends suggest that the prevalent alleles in the population of Mexico City may be associated with protection against the development of ALA.
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Affiliation(s)
- Eric G. Hernández
- Laboratorio de Inmunología, Departamento de Medicina Experimental, Facultad de Medicina, UNAM, Mexico City, México
| | - Julio Granados
- División de Inmunogenética, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), SSa, Mexico City, México
| | - Oswaldo Partida-Rodríguez
- Laboratorio de Inmunología, Departamento de Medicina Experimental, Facultad de Medicina, UNAM, Mexico City, México
| | - Olivia Valenzuela
- Departamento de Ciencias Químico-Biológicas, Universidad de Sonora, Hermosillo, Sonora, México
| | - Edgar Rascón
- Departamento de Ciencias Químico-Biológicas, Universidad de Sonora, Hermosillo, Sonora, México
| | - Ulises Magaña
- Departamento de Ciencias Químico-Biológicas, Universidad de Sonora, Hermosillo, Sonora, México
| | - Mónica Escamilla-Tilch
- División de Inmunogenética, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), SSa, Mexico City, México
| | - Alberto López-Reyes
- Laboratorio de Sinovioanálisis Molecular, Instituto Nacional de Rehabilitación, SSa, Mexico City, México
| | - Miriam Nieves-Ramírez
- Laboratorio de Inmunología, Departamento de Medicina Experimental, Facultad de Medicina, UNAM, Mexico City, México
| | - Enrique González
- Laboratorio de Inmunología, Departamento de Medicina Experimental, Facultad de Medicina, UNAM, Mexico City, México
| | - Patricia Morán
- Laboratorio de Inmunología, Departamento de Medicina Experimental, Facultad de Medicina, UNAM, Mexico City, México
| | - Liliana Rojas
- Laboratorio de Inmunología, Departamento de Medicina Experimental, Facultad de Medicina, UNAM, Mexico City, México
| | - Alicia Valadez
- Laboratorio de Inmunología, Departamento de Medicina Experimental, Facultad de Medicina, UNAM, Mexico City, México
| | - Alexandra Luna
- Laboratorio de Biología Molecular, Escuela de Medicina, Universidad Panamericana, Mexico City, México
| | - Francisco J. Estrada
- Laboratorio de Biología Molecular, Escuela de Medicina, Universidad Panamericana, Mexico City, México
| | - Carmen Maldonado
- Laboratorio de Investigación en Inmunología y proteómica, Hospital Infantil de México Federico Gómez, SSa, Mexico City, México
| | - Cecilia Ximénez
- Laboratorio de Inmunología, Departamento de Medicina Experimental, Facultad de Medicina, UNAM, Mexico City, México
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Juárez-Martín AI, González-Sobrino BZ, Olvera ÁEC, Falfán-Valencia R. HLA class II alleles in the Otomi population of the Mezquital Valley: a genetic approach to the history of interethnic migrations in the Mexican Central Plateau. Hum Biol 2015; 86:167-84. [PMID: 25836745 DOI: 10.13110/humanbiology.86.3.0167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
From a historical and genetic point of view, the Otomi of the Mezquital Valley are a frontier people that have played an important role in the population dynamics of the Mexican Central Plateau. Due to the antiquity of their presence in the area, the Otomi may be bearers of ancient genetic variability, shared mainly today with other groups belonging to the Otomanguean linguistic family and with the Nahua. In this study we analyzed the HLA class II allele frequencies reported in Mexican indigenous populations, in order to provide an intraregional-level historical perspective of the genetic relationships between the Otomi of the Mezquital Valley and indigenous populations from other regions of Mexico. We examined genetic variation in HLA-DRB1 and -DQB1 loci in 66 nonrelated individuals belonging to seven indigenous communities from the Ixmiquilpan municipality in the Mezquital Valley, in the State of Hidalgo, Mexico. The variability of the HLA-DRB1 gene among the Otomi of the Mezquital Valley was mainly concentrated in five alleles: -DRB1*08:02 (31.06%), -DRB1*04:07 (25.77%), -DRB1*14:06 (7.55%), -DRB1*14:02 (6.06%), and -DRB1*16:02 (4.55%); these alleles have been previously described in other indigenous populations. The most frequent alleles at the HLA-DQB1 locus were -DQB1*03:02 (34.09%), -DQB1*04:02 (31.03%), and -DQB1*03:01 (19.7%). Furthermore, the HLA-DQB1*02:02 allele was found in the Otomi group with a frequency of 2.27%; this allele has not been reported in Mexican indigenous populations. In conclusion, the genetic constitution of the Otomi population is intermediate to the northern groups and the genetic variability shared by the peoples of the central regions of Mexico. Furthermore, HLA-DRB1 and -DQB1 allelic variability among the Otomi provides insight into the historical processes implied in the biological admixture with European, Asian, and African populations as well as in the admixture with the population of Mexico City associated with long-standing migratory processes.
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Affiliation(s)
- Ana Itzel Juárez-Martín
- 1 Instituto de Investigaciones Antropológicas, Universidad Nacional Autónoma de México, Ciudad de México, México
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Genetic polymorphisms of interleukin-1 alpha and the vitamin d receptor in mexican mestizo patients with intervertebral disc degeneration. Int J Genomics 2014; 2014:302568. [PMID: 25506053 PMCID: PMC4258367 DOI: 10.1155/2014/302568] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 11/12/2014] [Indexed: 01/08/2023] Open
Abstract
Intervertebral disc degeneration (IDD) is the most common diagnosis in patients with back pain, a leading cause of musculoskeletal disability worldwide. Several conditions, such as occupational activities, gender, age, and obesity, have been associated with IDD. However, the development of this disease has strong genetic determinants. In this study, we explore the possible association between rs1800587 (c.-949C>T) of interleukin-1 alpha (IL1A) and rs2228570 (c.2T>V) and rs731236 (c.1056T>C) of vitamin D receptor (VDR) gene polymorphisms and the development of IDD in northwestern Mexican Mestizo population. Gene polymorphisms were analyzed by polymerase chain reaction followed by restriction fragment length polymorphism, in two groups matched by age and gender: patients with symptomatic lumbar IDD (n = 100) and subjects with normal lumbar-spine MRI-scans (n = 100). Distribution of the mutated alleles in patients and controls was 27.0% versus 28.0% (P = 0.455) for T of rs1800587 (IL1A); 53.0% versus 58.0% (P = 0.183) for V of rs2228570 (VDR); and 18.0% versus 21.0% (P = 0.262) for C of rs731236 (VDR). Our results showed no association between the studied polymorphisms and IDD in this population. This is the first report on the contribution of gene polymorphisms on IDD in a Mexican population.
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Hernández-Molina G, Vargas-Alarcón G, Rodríguez-Pérez JM, Martínez-Rodríguez N, Lima G, Sánchez-Guerrero J. High-resolution HLA analysis of primary and secondary Sjögren's syndrome: a common immunogenetic background in Mexican patients. Rheumatol Int 2014; 35:643-9. [PMID: 25261962 DOI: 10.1007/s00296-014-3143-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 09/20/2014] [Indexed: 10/24/2022]
Abstract
To compare the distribution of HLA-A, B, DRB1 and DQB1 alleles among Mexican patients with primary Sjögren Syndrome (pSS), secondary SS (sSS), connective tissue disease (CTD) without (w/o) SS and historical ethnically healthy controls. We included 28 pSS, 30 sSS, 96 CTD w/o SS patients and 234 controls. HLA-A, B, DRB1 and DQB1 were amplified and sequenced using the Allele SEQR Sequenced Based Typing Kits and analyzed on the ABI Prism*3130 DNA Analyzer using the Assign software. Gene frequencies were obtained by direct counting. Contingence tables of 2 × 2 were generated and analyzed by the Mantel-Haenzel χ (2) or Fisher's test (EPIINFO program). We reported odds ratios (OR) and corrected p values. SS patients showed increased frequencies of A*68:01 and DRB1*14:06 alleles when compared to CTD w/o SS (OR 4.43, 95 % CI 1.35-14.14, p = 0.007 and OR 14, 95 % CI 1.68-116, p = 0.001, respectively) and a higher prevalence of DRB1*01:01 (OR 5.9, 95 % CI 2.13-16.56, p = 0.003) and HLA-B*35:01 (OR 3.70, 95 % CI 1.92-7.12, p = 0.004) when compared with controls. pSS patients had a higher frequency of DRB1*14:06 allele than sSS (OR 16, 95 % CI 1.59-390, p = 0.001). Anti-Ro/SSA positivity was associated with B*51:01 (OR 10.11, 95 % CI 1.09-245, p = 0.02) and DRB1*03:01 alleles (OR 4.26, 95 % CI 1.01-18.89, p = 0.029), whereas the A*01:01 allele was associated with anti-La/SSB positivity (OR 4.75, 95 % CI 1.32-16.92, p = 0.003). In our population, the DRB1*14:06 allele was associated with primary and secondary SS implying that both varieties bear a similar immunogenetic background.
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Affiliation(s)
- Gabriela Hernández-Molina
- Department of Immunology and Rheumatology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
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Abstract
HLA-B35 has consistently been associated with rapid HIV disease progression, particularly alleles of the Px group. As B35 is the most prevalent HLA-B in Mexico, we investigated HIV disease outcome in relation to HLA expression in a large cohort (n=976) of Mexicans. Contrary to the previous studies, no impact on viral load or CD4 cell count was observed in association with the B35 PY/Px groups. However, we observed differences in HIV disease outcome associated with specific HLA-B35 alleles.
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Jawdat D, Al-Hamad B, Al-Jumah M, Hajeer A. HLA-B50 polymorphism in the Saudi population. Int J Immunogenet 2013; 41:95-7. [PMID: 24256064 DOI: 10.1111/iji.12096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 09/05/2013] [Accepted: 09/22/2013] [Indexed: 11/27/2022]
Abstract
The HLA-B50 serologic family is very frequent in people of Arabic origin. In Saudi Arabia, HLA-B50 is the most frequent HLA-B allele. The aim of this study was to investigate the distribution of HLA-B50 alleles in healthy Saudi individuals. A total of 162 healthy Saudi individuals were selected based on low-resolution HLA typing. DNA samples were typed by sequence-based typing method for exons 2, 3 and 4 of the HLA-B locus (Genome Diagnostics B.V.). The HLA-B*50 alleles were analysed using SBT engine software. HLA-B*50:01:01 was found in 161 of 162 individuals (99.4%), while HLA-B*50:09 was found in one individual (0.6%). HLA-B*50:01:01 is the most common HLA-B50 allele in Saudi Arabia.
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Affiliation(s)
- D Jawdat
- King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia; College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
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Zúñiga J, Yu N, Barquera R, Alosco S, Ohashi M, Lebedeva T, Acuña-Alonzo V, Yunis M, Granados-Montiel J, Cruz-Lagunas A, Vargas-Alarcón G, Rodríguez-Reyna TS, Fernandez-Viña M, Granados J, Yunis EJ. HLA class I and class II conserved extended haplotypes and their fragments or blocks in Mexicans: implications for the study of genetic diversity in admixed populations. PLoS One 2013; 8:e74442. [PMID: 24086347 PMCID: PMC3781075 DOI: 10.1371/journal.pone.0074442] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 07/31/2013] [Indexed: 01/03/2023] Open
Abstract
Major histocompatibility complex (MHC) genes are highly polymorphic and informative in disease association, transplantation, and population genetics studies with particular importance in the understanding of human population diversity and evolution. The aim of this study was to describe the HLA diversity in Mexican admixed individuals. We studied the polymorphism of MHC class I (HLA-A, -B, -C), and class II (HLA-DRB1, -DQB1) genes using high-resolution sequence based typing (SBT) method and we structured the blocks and conserved extended haplotypes (CEHs) in 234 non-related admixed Mexican individuals (468 haplotypes) by a maximum likelihood method. We found that HLA blocks and CEHs are primarily from Amerindian and Caucasian origin, with smaller participation of African and recent Asian ancestry, demonstrating a great diversity of HLA blocks and CEHs in Mexicans from the central area of Mexico. We also analyzed the degree of admixture in this group using short tandem repeats (STRs) and HLA-B that correlated with the frequency of most probable ancestral HLA-C/−B and -DRB1/−DQB1 blocks and CEHs. Our results contribute to the analysis of the diversity and ancestral contribution of HLA class I and HLA class II alleles and haplotypes of Mexican admixed individuals from Mexico City. This work will help as a reference to improve future studies in Mexicans regarding allotransplantation, immune responses and disease associations.
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Affiliation(s)
- Joaquín Zúñiga
- Department of Immunology, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico City, Mexico
| | - Neng Yu
- HLA Laboratory, The American Red Cross Northeast Division, Dedham, Massachusetts, United States of America
| | - Rodrigo Barquera
- Molecular Genetics Laboratory, National School of Anthropology and History, Mexico City, Mexico
| | - Sharon Alosco
- HLA Laboratory, The American Red Cross Northeast Division, Dedham, Massachusetts, United States of America
| | - Marina Ohashi
- HLA Laboratory, The American Red Cross Northeast Division, Dedham, Massachusetts, United States of America
| | - Tatiana Lebedeva
- HLA Laboratory, The American Red Cross Northeast Division, Dedham, Massachusetts, United States of America
| | - Víctor Acuña-Alonzo
- Molecular Genetics Laboratory, National School of Anthropology and History, Mexico City, Mexico
| | - María Yunis
- Department of Cancer Immunology and AIDS, Dana Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Julio Granados-Montiel
- Tissue Engineering, Cell Therapy and Regenerative Medicine Research Unit, Instituto Nacional de Rehabilitación, Mexico City, Mexico
| | - Alfredo Cruz-Lagunas
- Department of Immunology, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico City, Mexico
| | - Gilberto Vargas-Alarcón
- Laboratory of Genomics, Instituto Nacional de Cardiología Ignacio Chavez, Mexico City, Mexico
| | - Tatiana S. Rodríguez-Reyna
- Department of Immunology and Rheumatology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Marcelo Fernandez-Viña
- Department of Pathology, Stanford University, Stanford, California, United States of America
| | - Julio Granados
- Department of Transplantation, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
- * E-mail: (EJY); (JG)
| | - Edmond J. Yunis
- Department of Cancer Immunology and AIDS, Dana Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail: (EJY); (JG)
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Escamilla-Tilch M, Torres-Carrillo NM, Payan RR, Aguilar-Medina M, Salazar MI, Fafutis-Morris M, Arenas-Guzman R, Estrada-Parra S, Estrada-Garcia I, Granados J. Association of genetic polymorphism of HLA-DRB1 antigens with the susceptibility to lepromatous leprosy. Biomed Rep 2013; 1:945-949. [PMID: 24649058 DOI: 10.3892/br.2013.167] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 09/16/2013] [Indexed: 11/05/2022] Open
Abstract
Despite the introduction of multidrug therapy and the overall reduction of leprosy prevalence in Mexico, the disease remains endemic in certain regions of the country. A genetic basis for the immune susceptibility to Mycobacterium leprae has already been established in different populations worldwide. In this study, we investigated the possible association of the HLA-DRB1 alleles with leprosy in a Mexican Mestizo population. The results demonstrated that the HLA-DRB1*01 allele is associated with lepromatous and dimorphic leprosy [P<0.001, odds ratio (OR)=4.6, 95% confidence interval (95% CI): 1.8-11.4; and P=0.03, OR=6.2, 95% CI: 1.1-31.6, respectively] and the frequency of the HLA-DRB1*08 allele was found to be significantly lower among leprosy patients compared to controls (P=0.046, OR=2.4, 95% CI: 1-5.8). In conclusion, although the association of the HLA-DR locus with leprosy has been established in different populations and several studies have demonstrated significant differences in the DR alleles, this study demonstrated an association of the HLA-DRB1*01 allele with susceptibility to lepromatous and dimorphic leprosy, as well as an association of the HLA-DRB1*08 allele with protection against leprosy in a Mexican Mestizo population.
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Affiliation(s)
- Monica Escamilla-Tilch
- Department of Immunology, National School of Biological Sciences, National Polytechnic Institute, Mexico City 11340, Mexico
| | | | - Rosalio Ramos Payan
- School of Chemical and Biological Sciences, Autonomous University of Sinaloa, Culiacan, Sinaloa 80040, Mexico
| | - Maribel Aguilar-Medina
- School of Chemical and Biological Sciences, Autonomous University of Sinaloa, Culiacan, Sinaloa 80040, Mexico
| | - Ma Isabel Salazar
- Department of Immunology, National School of Biological Sciences, National Polytechnic Institute, Mexico City 11340, Mexico
| | - Mary Fafutis-Morris
- Center for Research in Immunology and Dermatology, Dermatological Institute of Jalisco, Guadalajara, Jalisco 45190, Mexico ; Department of Physiology, University Center of Health Sciences, University of Guadalajara, Guadalajara, Jalisco 44100, Mexico
| | - Roberto Arenas-Guzman
- Mycology Section, General Hospital Dr Manuel Gea Gonzalez, Mexico City 14000, Mexico
| | - Sergio Estrada-Parra
- Department of Immunology, National School of Biological Sciences, National Polytechnic Institute, Mexico City 11340, Mexico
| | - Iris Estrada-Garcia
- Department of Immunology, National School of Biological Sciences, National Polytechnic Institute, Mexico City 11340, Mexico
| | - Julio Granados
- Department of Transplantation, National Institute of Medical Sciences and Nutrition Salvador Zubiran, Mexico City 14000, Mexico
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Influence of admixture components on CYP2C9*2 allele frequency in eight indigenous populations from Northwest Mexico. THE PHARMACOGENOMICS JOURNAL 2013; 13:567-72. [DOI: 10.1038/tpj.2012.52] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 10/20/2012] [Accepted: 11/16/2012] [Indexed: 11/09/2022]
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Romero-Quintana JG, Frías-Castro LO, Arámbula-Meraz E, Aguilar-Medina M, Dueñas-Arias JE, Melchor-Soto JD, Romero-Navarro JG, Ramos-Payán R. Identification of novel mutation in cathepsin C gene causing Papillon-Lefèvre Syndrome in Mexican patients. BMC MEDICAL GENETICS 2013; 14:7. [PMID: 23311634 PMCID: PMC3563609 DOI: 10.1186/1471-2350-14-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 01/08/2013] [Indexed: 11/15/2022]
Abstract
BACKGROUND Papillon-Lefèvre Syndrome (PLS) is a type IV genodermatosis caused by mutations in cathepsin C (CTSC), with a worldwide prevalence of 1-4 cases per million in the general population. In México, the prevalence of this syndrome is unknown, and there are few case reports. The diagnosis of twenty patients in the state of Sinaloa highlights the need to characterize this syndrome in Mexicans. METHODS To understand the basis of PLS in Mexicans, the gene expression, enzymatic activity and mutational analysis of CTSC were assayed in nine PLS patients and their relatives. Frequencies of CTSC gene polymorphisms and HLA alleles were determined in these patients, their relatives, and the population. RESULTS Patients showed normal CTSC gene expression, but a deep reduction (up to 85%) in enzymatic activity in comparison to unrelated healthy individuals. A novel loss-of-function mutation, c.203 T > G (p.Leu68Arg), was found in all patients, and some carried the polymorphism c.458C > T (p.Thr153Ile). Allelic frequencies in patients, relatives and controls were 88.89%, 38.24% and 0.25% for G (c.203 T > G); and 11.11%, 8.82% and 9.00% for T (c.458C > T). HLA-DRB1*11 was found significantly more frequent (P = 0.0071) in patients than controls (33.33% vs. 7.32%), with an estimated relative risk of 6.33. CONCLUSIONS The novel loss-of function mutation of CTSC gene (c.203 T > G) found in patients correlated with their diminished enzymatic activity, and HLA-DRB1*11 was found to be associated with PLS. The study of more PLS patients may give more insights into the etiology of the disease as well as its prevalence in México.
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Affiliation(s)
- José G Romero-Quintana
- Faculty of Biological and Chemical Sciences, Doctoral Program in Biotechnology and Master Program in Biomedical Sciences, Autonomous University of Sinaloa, Culiacán, Sinaloa, 80010, México
| | - Luis O Frías-Castro
- Dermatology, Pediatric Hospital of Sinaloa, Culiacán, Sinaloa, 80200, México
| | - Eliakym Arámbula-Meraz
- Faculty of Biological and Chemical Sciences, Doctoral Program in Biotechnology and Master Program in Biomedical Sciences, Autonomous University of Sinaloa, Culiacán, Sinaloa, 80010, México
| | - Maribel Aguilar-Medina
- Faculty of Biological and Chemical Sciences, Doctoral Program in Biotechnology and Master Program in Biomedical Sciences, Autonomous University of Sinaloa, Culiacán, Sinaloa, 80010, México
| | | | - Jesús D Melchor-Soto
- Odontopediatry divisions, Pediatric Hospital of Sinaloa, Culiacán, Sinaloa, 80200, México
| | - José G Romero-Navarro
- Faculty of Biological and Chemical Sciences, Doctoral Program in Biotechnology and Master Program in Biomedical Sciences, Autonomous University of Sinaloa, Culiacán, Sinaloa, 80010, México
| | - Rosalío Ramos-Payán
- Faculty of Biological and Chemical Sciences, Doctoral Program in Biotechnology and Master Program in Biomedical Sciences, Autonomous University of Sinaloa, Culiacán, Sinaloa, 80010, México
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42
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Human leukocyte antigen profiles of latin american populations: differential admixture and its potential impact on hematopoietic stem cell transplantation. BONE MARROW RESEARCH 2012; 2012:136087. [PMID: 23213535 PMCID: PMC3506882 DOI: 10.1155/2012/136087] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Accepted: 10/12/2012] [Indexed: 12/29/2022]
Abstract
The outcome of hematopoietic stem cell transplantation (HSCT) is shaped by both clinical and genetic factors that determine its success. Genetic factors including human leukocyte antigen (HLA) and non-HLA genetic variants are believed to influence the risk of potentially fatal complications after the transplant. Moreover, ethnicity has been proposed as a factor modifying the risk of graft-versus-host disease. The populations of Latin America are a complex array of different admixture processes with varying degrees of ancestral population proportions that came in different migration waves. This complexity makes the study of genetic risks in this region complicated unless the extent of this variation is thoroughly characterized. In this study we compared the HLA-A and HLA-B allele group profiles for 31 Latin American populations and 61 ancestral populations from Iberia, Italy, Sub-Saharan Africa, and America. Results from population genetics comparisons show a wide variation in the HLA profiles from the Latin American populations that correlate with different admixture proportions. Populations in Latin America seem to be organized in at least three groups with (1) strong Amerindian admixture, (2) strong Caucasian component, and (3) a Caucasian-African gradient. These results imply that genetic risk assessment for HSCT in Latin America has to be adapted for different population subgroups rather than as a pan-Hispanic/Latino analysis.
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Uscanga L. [Celiac disease]. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2012; 77 Suppl 1:32-4. [PMID: 22939474 DOI: 10.1016/j.rgmx.2012.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- L Uscanga
- Dirección de Enseñanza, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México, D.F
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Fernández-Torres J, Flores-Jiménez D, Arroyo-Pérez A, Granados J, López-Reyes A. The ancestry of the HLA-DRB1*15 allele predisposes the Mexican mestizo to the development of aplastic anemia. Hum Immunol 2012; 73:840-3. [PMID: 22580214 DOI: 10.1016/j.humimm.2012.04.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Revised: 04/11/2012] [Accepted: 04/16/2012] [Indexed: 11/17/2022]
Abstract
UNLABELLED Aplastic anemia (AA) is a hematological disorder characterized by pancytopenia in peripheral blood and hypoplasia in the bone marrow; the majority of cases have no known etiology, but it is thought that genetic and environmental factors can be involved in its pathogenesis. From the genetic viewpoint, it has been reported a significant increase frequency of the human leukocyte antigen HLA-DRB1(∗)15 in patients with AA as compared to ethnically matched healthy controls, this is true in different populations worldwide, which would suggests that this allele participates in the immune regulation of the disease. OBJECTIVE To determine gene frequencies of HLA-DRB1 alleles in Mexican mestizo patients with AA. METHODS We analyzed and compared the HLA-DRB1 alleles in 36 Mexican mestizo patients (female gender, n=13; male gender, n=23) with AA to those present in 201 umbilical cord blood (UCB) samples as a control group, this was done by means of the polymerase chain reaction-single specific primer (PCR-SSP) technique. RESULTS Analysis of gene frequencies of HLA-DRB1(∗) alleles exhibits a significant increase of HLA-DRB1(∗)15 allele in the group of patients with AA as compared to those present in the control group (15.27% vs. 2.23%, respectively; p=1×10(-5); odds ratio [OR]=9.3; 95% confidence interval [95% CI]=3.2-27.8). CONCLUSIONS Our results showed a positive association of the DRB1(∗)15 allele in Mexican patients with aplastic anemia, which coincides with that reported internationally. In addition, we think that this allele was introduced to the Mexican population structure inherited from European ancestry.
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Affiliation(s)
- Javier Fernández-Torres
- Laboratorio de Sinovioanálisis Molecular, Instituto Nacional de Rehabilitación, Secretaría de Salud, Calzada México-Xochimilco Núm. 289, Col. Arenal de Guadalupe, Del. Tlalpan, 14389 México, DF, Mexico.
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López-Hernández D, Meaney-Martínez A, Sánchez-Hernández OE, Rodríguez-Arellano E, Beltrán-Lagunes L, Estrada-García T. Criterio diagnóstico para hipoalfalipoproteinemia y punto de corte asociado con protección cardiovascular en una población mestiza mexicana. Med Clin (Barc) 2012; 138:551-6. [DOI: 10.1016/j.medcli.2011.09.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 09/19/2011] [Accepted: 09/20/2011] [Indexed: 10/28/2022]
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García-Obregón S, Alfonso-Sánchez MA, Pérez-Miranda AM, Gómez-Pérez L, de Parcorbo MM, Peña JA. Ancestry markers from the human chromosome 6: Alu repeats from the MHC in autochthonous Basques. Hum Immunol 2012; 73:720-5. [PMID: 22537750 DOI: 10.1016/j.humimm.2012.04.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Revised: 03/27/2012] [Accepted: 04/16/2012] [Indexed: 11/30/2022]
Abstract
Polymorphic Alu insertions from the MHC class I region were analyzed in 215 autochthonous Basques from Guipuzcoa and Navarre provinces, with the aim of contributing new MHC Alu data in European ancestry populations. We also seek to assess both the genetic position of native Basques among worldwide samples and the efficiency of the MHC Alu elements as ancestry informative markers (AIMs). According to the MDS and AMOVA results, worldwide populations included in the comparative analyses were grouped in three major clusters defined by genetic ancestry (Africans, Asians and Europeans). The δ values (differences in weighted allele frequencies) among ancestry groups indicated that Alu elements within the alpha-block (AluHF, AluHJ and AluHG) showed an adequate resolving power to discriminate appropriately between some of the major ancestry groups. Alpha block Alu were also revealing of the exceptionality of Basques, as they allowed for the detection of genetic heterogeneity even between Basques and the other Iberian collection considered in the analysis (Valencia). Thus, analysis of the Alu loci within the alpha-block may represent a reliable, informative and cost-effective method to explore the ancestry, geographic origins and demographic history of human populations, which can be very helpful for studies into epidemiological, forensic or evolutionary perspectives.
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Affiliation(s)
- Susana García-Obregón
- Departamento de Genética, Antropología Física y Fisiología Animal, Facultad de Ciencia y Tecnología, Universidad del País Vasco, EHU, Bilbao, Spain
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García-Romero MT, Granados J, Vega-Memije ME, Arenas R. Analysis of genetic polymorphism of the HLA-B and HLA-DR loci in patients with dermatophytic onychomycosis and in their first-degree relatives. ACTAS DERMO-SIFILIOGRAFICAS 2012; 103:59-62. [PMID: 22456594 DOI: 10.1016/j.adengl.2011.03.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 03/10/2011] [Indexed: 11/27/2022] Open
Abstract
Onychomycosis is known to have predisposing factors and a high prevalence within families that cannot be explained by within-family transmission. We determined the frequency of HLA-B and HLA-DR haplotypes in 25 families of Mexican patients with onychomycosis in order to define the role of the class II major histocompatibility complex (MHC) in genetic susceptibility to this infection. Seventy-eight subjects participated in the study, 47 with onychomycosis and 31 healthy individuals. The frequencies of the HLA-B and HLA-DR haplotypes were compared with those found in first-degree relatives without onychomycosis and in a historic control group of healthy individuals. The frequencies in the controls were similar to those of the healthy relatives of the patients. However, on comparison of the patients with historic controls, we detected a higher frequency of the HLA-DR8 haplotype (P=.03; odds ratio, 1.89; 95% confidence interval, 0.98-36). These findings suggest that there are polymorphisms in genes of the MHC that increase susceptibility to onychomycosis, particularly haplotype HLA-DR8.
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Affiliation(s)
- M T García-Romero
- Departamento de Dermatología, Servicio de Micología, Hospital General Dr. Manuel Gea González, México DF, Mexico
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Hassen E, Ghedira R, Ghandri N, Farhat K, Gabbouj S, Bouaouina N, Abdelaziz H, Nouri A, Chouchane L. Lack of association between human leukocyte antigen-E alleles and nasopharyngeal carcinoma in Tunisians. DNA Cell Biol 2011; 30:603-9. [PMID: 21332388 DOI: 10.1089/dna.2010.1140] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Nasopharyngeal carcinoma (NPC), a cancer with a remarkable geographical and worldwide ethnic distribution, has been strongly associated with human leukocyte antigen (HLA) class I genes. The presence of additional HLA risk factors has been suggested by several reports. In the present study, we analyzed the implication of HLA-E gene polymorphisms in NPC susceptibility in Tunisians, a population characterized by an intermediate incidence of NPC with specific clinical features. Peripheral blood DNA was obtained from 185 patients with NPC and 177 matched controls. Genotyping for three single-nucleotide polymorphisms, codon 83Gly/Arg, codon 157Arg/Gly, and codon 107Arg/Gly, was performed using the polymerase chain reaction method. The HLA-E*01:01 and HLA-E*01:03 were the only alleles found among Tunisians. The HLA-E*01:03 allele had a slight increase in patients with NPC (43%) compared with controls (37%), but the difference did not reach a statistical significance. Our results show the lack of association between HLA-E alleles and NPC in the Tunisian population. This is not in agreement with the previous studies, suggesting a potential implication of HLA-E gene polymorphisms in the susceptibility to NPC among populations with high-risk incidence. Our study further supports the dissimilarity of NPC between populations with different NPC incidence.
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Affiliation(s)
- Elham Hassen
- Molecular Immuno-Oncology Laboratory, Faculty of Medicine, Monastir University, Monastir, Tunisia.
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Arnaiz-Villena A, Moscoso J, Granados J, Serrano-Vela JI, de la Peña A, Reguera R, Ferri A, Seclen E, Izaguirre R, Perez-Hernandez N, Vargas-Alarcon G. HLA Genes in Mayos Population from Northeast Mexico. Curr Genomics 2011; 8:466-75. [PMID: 19412332 PMCID: PMC2647159 DOI: 10.2174/138920207783591735] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2007] [Revised: 11/01/2007] [Accepted: 11/02/2007] [Indexed: 11/22/2022] Open
Abstract
HLA class I and class II alleles have been studied in 60 unrelated people belonging to Mayos ethnic group, which lives in the Mexican Pacific Sinaloa State. Mayos HLA profile was compared to other Amerindians and worldwide populations’ profile. A total of 14,896 chromosomes were used for comparisons. Genetic distances between populations, Neigbour-Joining dendrograms and correspondence analyses were performed to determine the genetic relationship among population. The new specific Mayo HLA haplotypes found are: HLA-A*02-B*35-DRB1*1406-DQB1*0301; HLA-A*02-B*48-DRB1*0404-DQB1*0302; HLA-A*24-B*51-DRB1*0407-DQB1*0302 and HLA-A*02-B*08-DRB1*0407-DQB1*0302. However, the typical Meso American HLADRB1*0407 represents a 40% of all DRB1 alleles. While common HLA characteristics are found in Amerindian distant ethnic groups, still new group specific HLA haplotypes are being found, suggesting that a common founder effect (i.e. high DRB1*0407) is noticed. Moreover, new HLA haplotypes are almost certainly appearing along time probably due to specific pathogen (?) selection for diversity. Mayo language is close to the Tarahumara one (another geographically close group); notwithstanding both groups are not genetically close according to our results, showing again the different evolution of genes and languages, which do not correlate. Finally, Sinaloa is one of the Mexican States in which more European genes are found. However, the results presented in this paper, where no European HLA genes are seen in Mayos, should have a bearing in establishing transplant programs and in HLA and disease studies.
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Affiliation(s)
- A Arnaiz-Villena
- Department of Immunology, Universidad Complutense, The Madrid Regional Blood Center, Madrid, Spain
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García-Romero MT, Granados J, Vega-Memije ME, Arenas R. [Analysis of genetic polymorphism of the HLA-B and HLA-DR loci in patients with dermatophytic onychomycosis and in their first-degree relatives]. ACTAS DERMO-SIFILIOGRAFICAS 2011; 103:59-62. [PMID: 21742300 DOI: 10.1016/j.ad.2011.03.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Revised: 03/09/2011] [Accepted: 03/10/2011] [Indexed: 11/30/2022] Open
Abstract
Onychomycosis is known to have predisposing factors and a high prevalence within families that cannot be explained by within-family transmission. We determined the frequency of HLA-B and HLA-DR haplotypes in 25 families of Mexican patients with onychomycosis in order to define the role of the class II major histocompatibility complex (MHC) in genetic susceptibility to this infection. Seventy-eight subjects participated in the study, 47 with onychomycosis and 31 healthy individuals. The frequencies of the HLA-B and HLA-DR haplotypes were compared with those found in first-degree relatives without onychomycosis and in a historic control group of healthy individuals. The frequencies in the controls were similar to those of the healthy relatives of the patients. However, on comparison of the patients with historic controls, we detected a higher frequency of the HLA-DR8 haplotype (P=.03; odds ratio, 1.89; 95% confidence interval, 0.98-36). These findings suggest that there are polymorphisms in genes of the MHC that increase susceptibility to onychomycosis, particularly haplotype HLA-DR8.
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Affiliation(s)
- M T García-Romero
- Departamento de Dermatología, Servicio de Micología, Hospital General Dr. Manuel Gea González, México D.F., México
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