African genetic ancestry is associated with lower frequency of PNPLA3 G allele in non-alcoholic fatty liver in an admixed population

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Citações na Scopus
6
Tipo de produção
article
Data de publicação
2022
DOI
Scopus
Web of Science
PubMed
Título da Revista
ISSN da Revista
Título do Volume
Editora
ELSEVIER ESPANA
Autores
CAVALCANTE, Lourianne Nascimento
PORTO, Jun
LYRA, Andre Castro
REIS, Rui Manuel
SANYAL, Arun J.
Citação
ANNALS OF HEPATOLOGY, v.27, n.6, article ID 100728, 9p, 2022
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
Introduction and objectives: PNPLA3 (rs738409) and TM6SF2 (rs58542926) variants, interindividual and ethnic differences may be risk factors for non-alcoholic fatty liver disease (NAFLD). The PNPLA3 G allele is associated with worse NAFLD evolution in Hispanics and Caucasians. TM6SF2 is associated with hypertriglyceridemia, NAFLD, and cardiovascular disease. We aimed to evaluate the association between genetic ancestry by Ances-try Informative Markers (AIM), PNPLA3 and TM6SF2 polymorphisms in patients with biopsy-proven NAFLD in an admixed population.Methods: We included adults with biopsy-proven NAFLD and excluded patients with the presence of other chronic liver disease, alcohol intake >100g/week, HIV, drug-induced fatty liver disease, or liver transplanta-tion. We classified NAFLD using the Non-Alcoholic Steatohepatitis Clinical Research Network (NASH-CRN) histological scoring system. The PNPLA3 (rs738409 c.444C>G) and TM6SF2 (rs58542926 c.449C>T) genotyp-ing were performed by RT-PCR. Genetic ancestry was determined using 46 insertion-deletion AIM; a<0.05 was considered significant.Results: A total of 248 patients with NAFLD were enrolled [34 with simple steatosis (NAFL); 214 with NASH]. Overall, we detected a greater European ancestry contribution (0.645), followed by African (0.173), Amerin-dian (0.095), and East Asian (0.087) ancestry contribution, without differences between NAFL and NASH patients. However, we found a higher African genetic ancestry contribution among patients with NAFL who had the PNPLA3 C/C genotype than those with the G allele (0.216 +/- 0.205 versus 0.105 +/- 0.101, respectively; p=0.047). Ancestry contributions did not differ among TM6SF2 genotypes.Conclusion: Among NAFL patients, greater African genetic ancestry was associated to a lower frequency of the PNPLA3 G allele, demonstrating a possible NASH ancestry-related protective factor.(c) 2022 Published by Elsevier Espana, S.L.U. on behalf of Fundacion Clinica Medica Sur, A.C. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Palavras-chave
Steatohepatitis, NASH, Ancestry, PNPLA3, TM62SF
URI
https://observatorio.fm.usp.br/handle/OPI/51497
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Coleções
Artigos e Materiais de Revistas Científicas - FM/MGT
Artigos e Materiais de Revistas Científicas - FM/MPT
Artigos e Materiais de Revistas Científicas - HC/ICHC
Artigos e Materiais de Revistas Científicas - LIM/07
Artigos e Materiais de Revistas Científicas - LIM/14
Artigos e Materiais de Revistas Científicas - ODS/03