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Journal of Pediatric Gastroenterology & Nutrition:
doi: 10.1097/MPG.0b013e31821de3fc
Original Articles: Gastroenterology

Amerindian mtDNA Haplogroups and Celiac Disease Risk HLA Haplotypes in Mixed-blood Latin American Patients

Parada, Alejandra*; Araya, Magdalena*; Pérez-Bravo, Francisco; Méndez, Marco*; Mimbacas, Adriana; Motta, Patricia§; Martín, Gabriela§; Botero, Jorge*; Espinosa, Nelly||; Alarcon, Teresa; Canales, Paulina#



In the article that appeared on page 429 of the October 2011 issue, an author's name was misspelled. The author's name should have appeared as Graciela Martín.

Journal of Pediatric Gastroenterology and Nutrition. 53(6):702, December 2011.

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Background and Objective: Risk haplotypes have been described in celiac disease (CD), but the influence of native genes on CD in Hispanic Americans is unknown. The aim of the study was to measure the frequency of Amerindian mitochondrial DNA (mtDNA) haplogroups (inherited by the maternal line) in mixed-blood patients with CD from Chile, Argentina, and Uruguay, and to assess the relation between these and human leukocyte antigen (HLA) alleles and haplotypes and clinical presentations.

Patients and Methods: Clinical history, histological data, and genetic studies were conducted following 2 protocols: a case-control study of 72 Chilean patients with CD and controls, and an assessment of 43 (additional) samples of celiac patients from Chile, 96 from Argentina, and 57 from Uruguay, compared with the mtDNA frequency in the corresponding country. HLA typing was performed by a commercial kit, and mtDNA was determined by means of polymerase chain reaction and restriction fragment length polymorphisms analysis.

Results: A total of 73.6% of cases had typical presentations. The most frequent HLA alleles were HLA-DQB*201 and 202. No-DQ2/DQ8 HLA haplotypes were found in 7% of cases. mtDNA frequencies for typical Amerindian haplogroups were found in 71% of cases and 64% of controls (P χ2 = 0.016); in the comparative analysis, mtDNA distribution was not different from the figures reported for the respective general country population. No relation was found between haplotypes or haplogroups and clinical presentations.

Conclusions: mtDNA haplogroups A/B/C/D were frequently found in celiac patients and controls, but no relations appeared between haplogroups, haplotypes, and clinical presentations.

Copyright 2011 by ESPGHAN and NASPGHAN


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