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• W2904246627 abstract "Biliary atresia (BA), a fibrosing disorder of the developing biliary tract leading to liver failure in infancy, has an elevated incidence in indigenous New Zealand (NZ) Māori. We investigated a high rate of BA in a group of children (n = 12) belonging to a single Māori iwi (or ‘tribe’, related through a remote ancestor). Population and geographical data was used to estimate the rate of BA in Māori sub-groups, and a pedigree linking most of the affected children was constructed from oral and documented history. Array genotyping was used to examine hypotheses about the inheritance of a possible genetic risk factor, and the history of the affected population, and Exome Sequencing to search for candidate genes. Most of these affected children (n = 7) link to a self-reported pedigree and carry a 50-fold increase in BA risk over unrelated Māori (χ2 = 296P < 0.001, 95% CI 23–111). Genetic analysis using FEstim and SNP array genotypes revealed no evidence for elevated consanguinity between parents of affected children (FEstim: F (2,21) = 0.469, P > 0.63). Genome-wide quantitation of intervals of contiguous, homozygous-by-state markers reached a similar conclusion (F (2,399) = 1.99, P = 0.138). Principal component analysis and investigation with STRUCTURE found no evidence of increased allele frequency of either a recessive variant, or additive, low-risk variants due to reproductive isolation. To identify candidate causal factors, Exome Sequencing datasets were scrutinised for shared rare coding variants across 8 affected individuals. No rare, non-synonymous, phylogenetically conserved variants were common to 6 or more affected children. The substantially elevated risk for development of BA in this subgroup could be mediated by genetic factors, but the iwi exhibits no properties indicative of recent or remote reproductive isolation. Resolution of any risk loci may rely on extensive genomic sequencing studies in this iwi or investigation of other mechnaisms such as copy number variation." @default.
• W2904246627 created "2018-12-22" @default.
• W2904246627 creator A5012314148 @default.
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• W2904246627 date "2018-12-01" @default.
• W2904246627 modified "2023-10-06" @default.
• W2904246627 title "Genetic investigation into an increased susceptibility to biliary atresia in an extended New Zealand Māori family" @default.
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• W2904246627 doi "https://doi.org/10.1186/s12920-018-0440-0" @default.
• W2904246627 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6299523" @default.
• W2904246627 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30563518" @default.
• W2904246627 hasPublicationYear "2018" @default.
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