MADloy : robust detection of mosaic loss of chromosome Y from genotype-array-intensity data
González, Juan Ramón (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
López-Sánchez, Marcos (Centro de Investigación Biomédica en Red de Enfermedades Raras)
Cáceres, Alejandro (Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública)
Puig, Pedro (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
Esko, Tõnu (University of Tartu. Estonian Genome Centre Science Centre)
Pérez-Jurado, Luis Alberto (University of Adelaide. South Australian Health and Medical Research Institute)

Fecha:	2020
Resumen:	Accurate protocols and methods to robustly detect the mosaic loss of chromosome Y (mLOY) are needed given its reported role in cancer, several age-related disorders and overall male mortality. Intensity SNP-array data have been used to infer mLOY status and to determine its prominent role in male disease. However, discrepancies of reported findings can be due to the uncertainty and variability of the methods used for mLOY detection and to the differences in the tissue-matrix used. We created a publicly available software tool called MADloy (Mosaic Alteration Detection for LOY) that incorporates existing methods and includes a new robust approach, allowing efficient calling in large studies and comparisons between methods. MADloy optimizes mLOY calling by correctly modeling the underlying reference population with no-mLOY status and incorporating B-deviation information. We observed improvements in the calling accuracy to previous methods, using experimentally validated samples, and an increment in the statistical power to detect associations with disease and mortality, using simulation studies and real dataset analyses. To understand discrepancies in mLOY detection across different tissues, we applied MADloy to detect the increment of mLOY cellularity in blood on 18 individuals after 3 years and to confirm that its detection in saliva was sub-optimal (41%). We additionally applied MADloy to detect the down-regulation genes in the chromosome Y in kidney and bladder tumors with mLOY, and to perform pathway analyses for the detection of mLOY in blood. MADloy is a new software tool implemented in R for the easy and robust calling of mLOY status across different tissues aimed to facilitate its study in large epidemiological studies.
Ayudas:	Agencia Estatal de Investigación RTI2018-100789-B-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1468 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1974 Ministerio de Economía y Competitividad MDM-2014-0370 Ministerio de Ciencia e Innovación CEX2018-000806-S
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Loss of chromosome Y ; SNP array ; Bioconductor
Publicado en:	BMC bioinformatics, Vol. 21 (November 2020) , art. 533, ISSN 1471-2105

DOI: 10.1186/s12859-020-03768-z
PMID: 33225898

17 p, 1.6 MB

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