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No major host genetic risk factor contributed to A(H1N1)2009 influenza severity
Garcia-Etxebarria, K.; Bracho, M.A.; Galán, J.C.; Pumarola, T.; Castilla, Jesús; Ortiz de Lejarazu, R.; Rodríguez-Dominguez, M.; Quintela, I.; Bonet, N.; Garcia-Garcerà, M.; Domínguez García, Àngela; González-Candelas, F.; Calafell, F.
Universitat de Barcelona
While most patients affected by the influenza A(H1N1) pandemic experienced mild symptoms, a small fraction required hospitalization, often without concomitant factors that could explain such a severe course. We hypothesize that host genetic factors could contribute to aggravate the disease. To test this hypothesis, we compared the allele frequencies of 547,296 genome-wide single nucleotide polymorphisms (SNPs) between 49 severe and 107 mild confirmed influenza A cases, as well as against a general population sample of 549 individuals. When comparing severe vs. mild influenza A cases, only one SNP was close to the conventional p = 5×10−8. This SNP, rs28454025, sits in an intron of the GSK233 gene, which is involved in a neural development, but seems not to have any connections with immunological or inflammatory functions. Indirectly, a previous association reported with CD55 was replicated. Although sample sizes are low, we show that the statistical power in our design was sufficient to detect highly-penetrant, quasi-Mendelian genetic factors. Hence, and assuming that rs28454025 is likely to be a false positive, no major genetic factor was detected that could explain poor influenza A course.
Factors de risc en les malalties
Estudi de casos
Risk factors in diseases
Case studies
cc-by (c) Garcia-Etxebarria, K. et al., 2015
Public Library of Science (PLoS)

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