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2016 ; 21
(ä): 249-60
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KNOWLEDGE DRIVEN BINNING AND PHEWAS ANALYSIS IN MARSHFIELD PERSONALIZED MEDICINE
RESEARCH PROJECT USING BIOBIN
#MMPMID26776191
Basile AO
; Wallace JR
; Peissig P
; McCarty CA
; Brilliant M
; Ritchie MD
Pac Symp Biocomput
2016[]; 21
(ä): 249-60
PMID26776191
show ga
Next-generation sequencing technology has presented an opportunity for rare
variant discovery and association of these variants with disease. To address the
challenges of rare variant analysis, multiple statistical methods have been
developed for combining rare variants to increase statistical power for detecting
associations. BioBin is an automated tool that expands on collapsing/binning
methods by performing multi-level variant aggregation with a flexible,
biologically informed binning strategy using an internal biorepository, the
Library of Knowledge (LOKI). The databases within LOKI provide variant details,
regional annotations and pathway interactions which can be used to generate bins
of biologically-related variants, thereby increasing the power of any subsequent
statistical test. In this study, we expand the framework of BioBin to incorporate
statistical tests, including a dispersion-based test, SKAT, thereby providing the
option of performing a unified collapsing and statistical rare variant analysis
in one tool. Extensive simulation studies performed on gene-coding regions showed
a Bin-KAT analysis to have greater power than BioBin-regression in all simulated
conditions, including variants influencing the phenotype in the same direction, a
scenario where burden tests often retain greater power. The use of Madsen-
Browning variant weighting increased power in the burden analysis to that
equitable with Bin-KAT; but overall Bin-KAT retained equivalent or higher power
under all conditions. Bin-KAT was applied to a study of 82 pharmacogenes
sequenced in the Marshfield Personalized Medicine Research Project (PMRP). We
looked for association of these genes with 9 different phenotypes extracted from
the electronic health record. This study demonstrates that Bin-KAT is a powerful
tool for the identification of genes harboring low frequency variants for complex
phenotypes.
|*Phenotype
[MESH]
|*Software
[MESH]
|Computational Biology/methods/statistics & numerical data
[MESH]
|Computer Simulation
[MESH]
|Databases, Genetic/statistics & numerical data
[MESH]
|Genetic Variation
[MESH]
|Genome-Wide Association Study/*statistics & numerical data
[MESH]
|High-Throughput Nucleotide Sequencing/statistics & numerical data
[MESH]
|Humans
[MESH]
|Knowledge Bases
[MESH]
|Models, Genetic
[MESH]
|Models, Statistical
[MESH]
|Pharmacogenetics/statistics & numerical data
[MESH]