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ISSN: 1233-9687
Polish Journal of Pathology
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vol. 68
Original paper

Massively parallel targeted resequencing reveals novel genetic variants associated with aspergillosis in paediatric patients with haematological malignancies

Katarzyna Skonieczna, Jan Styczyński, Anna Krenska, Piotr Stawiński, Rafał Płoski, Katarzyna Derwich, Wanda Badowska, Mariusz Wysocki, Tomasz Grzybowski

Pol J Pathol 2017; 68 (3): 210-217
Online publish date: 2017/11/30
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This study aimed to find novel genetic variants of susceptibility to aspąergillosis in paediatric patients with haematological malignancies. Complete sequences of fifteen genes of human innate immunity (CCL2, CCR2, CD209, CLEC6A, CLEC7A and ten TLR genes) were studied in 40 patients diagnosed with haematological disorders (20 unaffected and 20 affected by aspergillosis). All samples were sequenced with MiSeq (Illumina) and 454 (Roche Diagnostics) technologies. Statistical significance of the differences between studied groups was determined using the two-tailed Fisher’s exact test. Sixty variants of potential importance were identified, the vast majority of which are located in non-coding parts of the targeted genes. At the threshold of p < 0.000005, one intergenic (TLR2 rs4585282) and one intronic variant (CLEC6A rs12099687) were found significant between the case and control groups for genotype and allele frequencies, respectively. Rs12099687 in CLEC6A was predicted to constitute an alternative isoform or cryptic splice site, which potentially changes activity of the Dectin-2 protein. Overall, we assume that the two strongest associations reported in this study are expected to be reproducible even in the absence of other evidence, while another twelve associations may be strong enough to justify additional research in larger cohorts.

aspergillosis, children, human innate immunity genes, massively parallel sequencing, SNP

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