Universidad Peruana Cayetano Heredia

Admixture/fine-mapping in Brazilians reveals a West African associated potential regulatory variant (rs114066381) with a strong female-specific effect on body mass and fat mass indexes

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dc.contributor.author Scliar, Marilia O.
dc.contributor.author Sant'Anna, Hanaisa P.
dc.contributor.author Santolalla Robles, Meddly Leslye
dc.contributor.author Leal, Thiago P.
dc.contributor.author Araujo, Nathalia M.
dc.contributor.author Alvim, Isabela
dc.contributor.author Borda, Victor
dc.contributor.author Magalhaes, Wagner C. S.
dc.contributor.author Gouveia, Mateus H.
dc.contributor.author Lyra, Ricardo
dc.contributor.author Machado, Moara
dc.contributor.author Michelin, Lucas
dc.contributor.author Rodrigues, Maira R.
dc.contributor.author Araujo, Gilderlanio S.
dc.contributor.author Kehdy, Fernanda S. G.
dc.contributor.author Zolini, Camila
dc.contributor.author Peixoto, Sergio V.
dc.contributor.author Luizon, Marcelo R.
dc.contributor.author Lobo, Francisco
dc.contributor.author Naslavsky, Michel S.
dc.contributor.author Yamamoto, Guilherme L.
dc.contributor.author Duarte, Yeda A. O.
dc.contributor.author Hansen, Matthew E. B.
dc.contributor.author Norris, Shane A.
dc.contributor.author Gilman, Robert Hugh
dc.contributor.author Guio, Heinner
dc.contributor.author Hsing, Ann W.
dc.contributor.author Mbulaiteye, Sam M.
dc.contributor.author Mensah, James
dc.contributor.author Dutil, Julie
dc.contributor.author Yeager, Meredith
dc.contributor.author Yeboah, Edward
dc.contributor.author Tishkoff, Sarah A.
dc.contributor.author Choudhury, Ananyo
dc.contributor.author Ramsay, Michele
dc.contributor.author Passos-Bueno, Maria Rita
dc.contributor.author Zatz, Mayana
dc.contributor.author O'Connor, Timothy D.
dc.contributor.author Pereira, Alexandre C.
dc.contributor.author Barreto, Mauricio L.
dc.contributor.author Lima-Costa, Maria Fernanda
dc.contributor.author Horta, Bernardo L.
dc.contributor.author Tarazona-Santos, Eduardo
dc.date.accessioned 2021-04-13T20:51:04Z
dc.date.available 2021-04-13T20:51:04Z
dc.date.issued 2021
dc.identifier.uri https://hdl.handle.net/20.500.12866/9246
dc.description.abstract Background/objectives: Admixed populations are a resource to study the global genetic architecture of complex phenotypes, which is critical, considering that non-European populations are severely underrepresented in genomic studies. Here, we study the genetic architecture of BMI in children, young adults, and elderly individuals from the admixed population of Brazil. Subjects/methods: Leveraging admixture in Brazilians, whose chromosomes are mosaics of fragments of Native American, European, and African origins, we used genome-wide data to perform admixture mapping/fine-mapping of body mass index (BMI) in three Brazilian population-based cohorts from Northeast (Salvador), Southeast (Bambui), and South (Pelotas). Results: We found significant associations with African-associated alleles in children from Salvador (PALD1 and ZMIZ1 genes), and in young adults from Pelotas (NOD2 and MTUS2 genes). More importantly, in Pelotas, rs114066381, mapped in a potential regulatory region, is significantly associated only in females (p = 2.76e-06). This variant is rare in Europeans but with frequencies of similar to 3% in West Africa and has a strong female-specific effect (95% CI: 2.32-5.65 kg/m(2) per each A allele). We confirmed this sex-specific association and replicated its strong effect for an adjusted fat mass index in the same Pelotas cohort, and for BMI in another Brazilian cohort from Sao Paulo (Southeast Brazil). A meta-analysis confirmed the significant association. Remarkably, we observed that while the frequency of rs114066381-A allele ranges from 0.8 to 2.1% in the studied populations, it attains similar to 9% among women with morbid obesity from Pelotas, Sao Paulo, and Bambui. The effect size of rs114066381 is at least five times higher than the FTO SNPs rs9939609 and rs1558902, already emblematic for their high effects. Conclusions: We identified six candidate SNPs associated with BMI. rs114066381 stands out for its high effect that was replicated and its high frequency in women with morbid obesity. We demonstrate how admixed populations are a source of new relevant phenotype-associated genetic variants. en_US
dc.language.iso eng
dc.publisher Springer
dc.relation.ispartofseries International Journal of Obesity
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Genetics en_US
dc.subject Risk factors en_US
dc.title Admixture/fine-mapping in Brazilians reveals a West African associated potential regulatory variant (rs114066381) with a strong female-specific effect on body mass and fat mass indexes en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1038/s41366-021-00761-1
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.02.18
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.03.04
dc.relation.issn 1476-5497


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