Artículos de revistas
Population, Epidemiological, and Functional Genetics of Gastric Cancer Candidate Genes in Peruvians with Predominant Amerindian Ancestry
Digestive Diseases and Sciences
Background. Gastric adenocarcinoma is associated with chronic infection by Helicobacter pylori and with the host inflammatory response triggered by it, with substantial inter-person variation in the immune response profile due to host genetic factors. Aim. To investigate the diversity of the proinflammatory genes IL8, its receptors and PTGS2 in Amerindians; to test whether candidate SNPs in these genes are associated with gastric cancer in an admixed population with high Amerindian ancestry from Lima, Peru; and to assess whether an IL8RB promoter-derived haplotype affects gene expression. Methods. We performed a Sanger-resequencing population survey, a candidate-gene association study (220 cases, 288 controls) and meta-analyses. We also performed an in vitro validation by a reporter gene assay of IL8RB promoter. Results. The diversity of the promoter of studied genes in Native Americans is similar to Europeans. Although an association between candidate SNPs and gastric cancer was not found in Peruvians, trend in our data is consistent with meta-analyses results that suggest PTGS2-rs689466-A is associated with H. pylori-associated gastric cancer in East Asia. IL8RB promoter-derived haplotype (rs3890158-A/rs4674258-T), common in Peruvians, was up-regulated by TNF-α unlike the ancestral haplotype (rs3890158-G/rs4674258-C). Bioinformatics analysis suggests that this effect stemmed from creation of a binding site for the FOXO3 transcription factor by rs3890158G>A. Conclusions. Our updated meta-analysis reinforces the role of PTGS2-rs689466-A in gastric cancer in Asians, although more studies that control for ancestry are necessary to clarify its role in Latin Americans. Finally, we suggest that IL8RB-rs3890158G>A is a cis-regulatory SNP.
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Unknown author (Annual Reviews, 2017)The history of the Americas involved the encounter of millions of Native Americans, Europeans, and Africans. A variable admixture of these three continental groups has taken place throughout the continent, influenced by ...
Identification of IRF8, TMEM39A, and IKZF3-ZPBP2 as susceptibility loci for systemic lupus erythematosus in a large-scale multiracial replication study Lessard, Christopher J.; Adrianto, Indra; Ice, John A.; Wiley, Graham B.; Kelly, Jennifer A.; Glenn, Stuart B.; Adler, Adam J.; Li, He; Rasmussen, Astrid; Williams, Adrienne H.; Ziegler, Julie; Comeau, Mary; Marion, Miranda; Wakeland, Benjamin E.; Liang, Chaoying; Ramos, Paula S.; Grundahl, Kiely M.; Gallant, Caroline J.; Alarcón-Riquelme, Marta E.; Alarcón, Graciela S.; Anaya, Juan-Manuel; Bae, Sang-Cheol; Boackle, Susan; Brown, Elizabeth E.; Chang, Deh-Ming; Cho, Soo-Kyung; Criswel, Lindsey A.; Edberg, Jeffrey C.; Freedman, Barry I.; Gilkeson, Gary S.; Jacob, Chaim O.; James, Judith A.; Kamen, Diane L.; Kimberly, Robert P.; Kim, Jae-Hoon; Martin, Javier; Merrill, Joan T.; Niewold, Timothy B.; Park, So-Yeon; Petri, Michelle A.; Pons-Estel, Bernardo A.; Ramsey-Goldman, Rosalind; Reveille, John D.; Scofield, Robert H.; Song, Yeong Wook; Stevens, Anne M.; Tsao, Betty P.; Vila, Luis M.; Vyse, Timothy J.; Yu, Chack-Yung; Guthridge, Joel M.; Kaufman, Kenneth M.; Harley, John B.; Wakeland, Edward K.; Langefeld, Carl D.; Gaffney, Patrick M.; Montgomery, Courtney G.; Moser, Kathy L. (2012)
Unknown author (Nature Research, 2016)Here we report the Simons Genome Diversity Project data set: high quality genomes from 300 individuals from 142 diverse populations. These genomes include at least 5.8 million base pairs that are not present in the human ...