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"Geographical distribution of risk genotypes in pediatric patients with celiac disease in Spain". Hum Immunol 2023; 84:290-295. [PMID: 36858916 DOI: 10.1016/j.humimm.2023.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 12/22/2022] [Accepted: 01/31/2023] [Indexed: 03/02/2023]
Abstract
Celiac disease is strongly associated with HLA DQ, specifically with haplotypes. DRB1*03-DQA1*05:01/DQB1*02:01 (DQ2.5),DRB1*07-DQA1*02:01/DQB1*02:02 (DQ2.2), DRB1*11-DQA1*05:05/DQB1*03:01 (DQ7.5), and DRB1*04-DQA1*03:01/DQB1*03:02 (DQ8). The distribution of these risk haplotypes in patients with celiac disease is different in the geographical areas investigated. A high frequency of DRB1*07- DQA1*02:01/DQB1*02:02 (DQ2.2) and DRB1*11-DQA1*05:05/DQB1*03:01 (DQ7.5), has been described in Southern Europe. We analyzed 2102 confirmed CD cases with information on both DQB1* alelles and their distribution by geographical area in Spain. According to the presence of this haplotype in one or two chromosomes, the genotype is classified in: DQ2 homozygous, DQ2 heterozygous (cis or trans), DQ8 homozygous, DQ8/DQ2.5, DQ 2.2 homozygous and genotype known as "half DQ2". Two different patterns of risks related to CD were identified. In the Basque Country and Navarre, the Mediterranean Area (Aragon, Catalonia, Valencia, Balearic Islands, and Murcia), the South of Spain (Andalucía and Extremadura), and the Canary Islands, higher frequency of DQ2.5 trans, and more than 80% of DQ2.5/DQ2.2 homozygosis were described. The Cantabrian Coast (Cantabria, Asturias, and Galicia) and Central Areas (Castilla-León and Castilla-La Mancha) showed a higher percentage of DQ2.5/DQ2.5 homozygosis and a lower DQ2.5 in trans frequency, as in Northern Europe. Madrid has an intermediate model between the two described above. 17 cases (0.8%) did not carry any CD risk haplotypes.
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Fibla J, Maceda I, Laplana M, Guerrero M, Álvarez MM, Burgueño J, Camps A, Fàbrega J, Felisart J, Grané J, Remón JL, Serra J, Moral P, Lao O. The power of geohistorical boundaries for modeling the genetic background of human populations: The case of the rural catalan Pyrenees. Front Genet 2023; 13:1100440. [PMID: 36704333 PMCID: PMC9871830 DOI: 10.3389/fgene.2022.1100440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/12/2022] [Indexed: 01/11/2023] Open
Abstract
The genetic variation of the European population at a macro-geographic scale follows genetic gradients which reflect main migration events. However, less is known about factors affecting mating patterns at a micro-geographic scale. In this study we have analyzed 726,718 autosomal single nucleotide variants in 435 individuals from the catalan Pyrenees covering around 200 km of a vast and abrupt region in the north of the Iberian Peninsula, for which we have information about the geographic origin of all grand-parents and parents. At a macro-geographic scale, our analyses recapitulate the genetic gradient observed in Spain. However, we also identified the presence of micro-population substructure among the sampled individuals. Such micro-population substructure does not correlate with geographic barriers such as the expected by the orography of the considered region, but by the bishoprics present in the covered geographic area. These results support that, on top of main human migrations, long ongoing socio-cultural factors have also shaped the genetic diversity observed at rural populations.
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Affiliation(s)
- Joan Fibla
- Department of Basic Medical Sciences, University of Lleida, Lleida, Spain,Institute of Biomedical Research of Lleida (IRBLleida), Lleida, Spain,*Correspondence: Joan Fibla, ; Oscar Lao,
| | - Iago Maceda
- CNAG-CRG, Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Marina Laplana
- Department of Basic Medical Sciences, University of Lleida, Lleida, Spain
| | - Montserrat Guerrero
- Department of Geography and Sociology, University of Lleida. Pl. Víctor Siurana, Lleida, Spain
| | - Miguel Martín Álvarez
- Genome Data Science, Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute for Science and Technology, Barcelona, Spain
| | - Jesús Burgueño
- Department of Geography and Sociology, University of Lleida. Pl. Víctor Siurana, Lleida, Spain
| | | | - Jordi Fàbrega
- Fundació Sant Hospital La Seu d’Urgell, La Seu d'Urgell, Spain
| | | | - Joan Grané
- Hospital de Campdevànol, Campdevànol, Girona, Spain
| | - José Luis Remón
- Servei d’atenció primària Lleida Nord, Gerència Territorial Alt Pirineu i Aran, Institut Català de la Salut, Tremp, Spain
| | - Jordi Serra
- Laboratori d’Anàlisis Clíniques, Hospital Comarcal del Pallars, Tremp, Spain
| | - Pedro Moral
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, Biodiversity Research Institute, University of Barcelona, Barcelona, Spain
| | - Oscar Lao
- CNAG-CRG, Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain,*Correspondence: Joan Fibla, ; Oscar Lao,
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Ongaro L, Molinaro L, Flores R, Marnetto D, Capodiferro MR, Alarcón-Riquelme ME, Moreno-Estrada A, Mabunda N, Ventura M, Tambets K, Achilli A, Capelli C, Metspalu M, Pagani L, Montinaro F. Evaluating the Impact of Sex-Biased Genetic Admixture in the Americas through the Analysis of Haplotype Data. Genes (Basel) 2021; 12:genes12101580. [PMID: 34680976 PMCID: PMC8535939 DOI: 10.3390/genes12101580] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 10/04/2021] [Accepted: 10/06/2021] [Indexed: 01/30/2023] Open
Abstract
A general imbalance in the proportion of disembarked males and females in the Americas has been documented during the Trans-Atlantic Slave Trade and the Colonial Era and, although less prominent, more recently. This imbalance may have left a signature on the genomes of modern-day populations characterised by high levels of admixture. The analysis of the uniparental systems and the evaluation of continental proportion ratio of autosomal and X chromosomes revealed a general sex imbalance towards males for European and females for African and Indigenous American ancestries. However, the consistency and degree of this imbalance are variable, suggesting that other factors, such as cultural and social practices, may have played a role in shaping it. Moreover, very few investigations have evaluated the sex imbalance using haplotype data, containing more critical information than genotypes. Here, we analysed genome-wide data for more than 5000 admixed American individuals to assess the presence, direction and magnitude of sex-biased admixture in the Americas. For this purpose, we applied two haplotype-based approaches, ELAI and NNLS, and we compared them with a genotype-based method, ADMIXTURE. In doing so, besides a general agreement between methods, we unravelled that the post-colonial admixture dynamics show higher complexity than previously described.
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Affiliation(s)
- Linda Ongaro
- Estonian Biocentre, Institute of Genomics, University of Tartu, Riia 23b, 51010 Tartu, Estonia; (L.M.); (R.F.); (D.M.); (K.T.); (M.M.); (L.P.); (F.M.)
- Correspondence:
| | - Ludovica Molinaro
- Estonian Biocentre, Institute of Genomics, University of Tartu, Riia 23b, 51010 Tartu, Estonia; (L.M.); (R.F.); (D.M.); (K.T.); (M.M.); (L.P.); (F.M.)
| | - Rodrigo Flores
- Estonian Biocentre, Institute of Genomics, University of Tartu, Riia 23b, 51010 Tartu, Estonia; (L.M.); (R.F.); (D.M.); (K.T.); (M.M.); (L.P.); (F.M.)
| | - Davide Marnetto
- Estonian Biocentre, Institute of Genomics, University of Tartu, Riia 23b, 51010 Tartu, Estonia; (L.M.); (R.F.); (D.M.); (K.T.); (M.M.); (L.P.); (F.M.)
| | - Marco R. Capodiferro
- Department of Biology and Biotechnology “L. Spallanzani”, University of Pavia, 27100 Pavia, Italy; (M.R.C.); (A.A.)
| | - Marta E. Alarcón-Riquelme
- Department of Medical Genomics, GENYO, Centro Pfizer—Universidad de Granada—Junta de Andalucía de Genómica e Investigación Oncológica, Av de la Ilustración 114, Parque Tecnológico de la Salud (PTS), 18016 Granada, Spain;
| | - Andrés Moreno-Estrada
- National Laboratory of Genomics for Biodiversity (LANGEBIO), CINVESTAV, Irapuato, Guanajuato 36821, Mexico;
| | - Nedio Mabunda
- Instituto Nacional de Saúde, Distrito de Marracuene, Estrada Nacional N°1, Província de Maputo, Maputo 1120, Mozambique;
| | - Mario Ventura
- Department of Biology-Genetics, University of Bari, 70126 Bari, Italy;
| | - Kristiina Tambets
- Estonian Biocentre, Institute of Genomics, University of Tartu, Riia 23b, 51010 Tartu, Estonia; (L.M.); (R.F.); (D.M.); (K.T.); (M.M.); (L.P.); (F.M.)
| | - Alessandro Achilli
- Department of Biology and Biotechnology “L. Spallanzani”, University of Pavia, 27100 Pavia, Italy; (M.R.C.); (A.A.)
| | - Cristian Capelli
- Department of Zoology, University of Oxford, Oxford OX1 3SZ, UK;
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124 Parma, Italy
| | - Mait Metspalu
- Estonian Biocentre, Institute of Genomics, University of Tartu, Riia 23b, 51010 Tartu, Estonia; (L.M.); (R.F.); (D.M.); (K.T.); (M.M.); (L.P.); (F.M.)
| | - Luca Pagani
- Estonian Biocentre, Institute of Genomics, University of Tartu, Riia 23b, 51010 Tartu, Estonia; (L.M.); (R.F.); (D.M.); (K.T.); (M.M.); (L.P.); (F.M.)
- Department of Biology, University of Padua, 35131 Padua, Italy
| | - Francesco Montinaro
- Estonian Biocentre, Institute of Genomics, University of Tartu, Riia 23b, 51010 Tartu, Estonia; (L.M.); (R.F.); (D.M.); (K.T.); (M.M.); (L.P.); (F.M.)
- Department of Biology-Genetics, University of Bari, 70126 Bari, Italy;
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