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HLA study in Mexico Nahua/Aztec Amerindians: Close relatedness to the ancient Central America ethnic groups

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Nahua population (also named Aztec or Mexica) was studied for HLA class II genes in a Mexican rural city (Santo Domingo Ocotitlan, Morelos State) belonging to the nowadays Náhuatl speaking areas in Mexico. The most frequent HLA class II alleles were typical Amerindian (HLA-DRB1*04:07, DQB1*03:01 DRB1*04:03 or DRB1*04:04) and also were some calculated extended haplotypes (HLA-DRB1*04:07-DQB1*03:02,DRB1*08:02-DQB1*04:02, or DRB1*10:01-DQB1*05:01 among others). When using HLA-DRB1 Neís genetic distances, our isolated Nahua population was found to be close to other Central America Amerindians like the ancient-established Mayans or Mixe. This may suggest that Nahuas origin was also from Central America. It contrasts to legend that assumes they came from the North, and they built the Aztec Empire after submitting Central America neighbouring ethnic groups before 1519 CE when Spaniards led by Hernán Cortés arrived to Mexico
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Suarez-Trujillo F, Vargas-Alarcon G, Juarez I, Gil-Martin R, Granados J, Vaquero-Yuste C, Martin-Villa JM, Arnaiz-Villena A. HLA study in Mexico Nahua/Aztec Amerindians: Close relatedness to the ancient Central America ethnic groups. Hum Immunol. 2023 May-Jul;84(5-7):313-314. doi: 10.1016/j.humimm.2023.03.004
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