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2015 ; 31
(23
): 3859-61
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aRrayLasso: a network-based approach to microarray interconversion
#MMPMID26283699
Brown AS
; Patel CJ
Bioinformatics
2015[Dec]; 31
(23
): 3859-61
PMID26283699
show ga
Robust conversion between microarray platforms is needed to leverage the wide
variety of microarray expression studies that have been conducted to date.
Currently available conversion methods rely on manufacturer annotations, which
are often incomplete, or on direct alignment of probes from different platforms,
which often fail to yield acceptable genewise correlation. Here, we describe
aRrayLasso, which uses the Lasso-penalized generalized linear model to model the
relationships between individual probes in different probe sets. We have
implemented aRrayLasso in a set of five open-source R functions that allow the
user to acquire data from public sources such as Gene Expression Omnibus, train a
set of Lasso models on that data and directly map one microarray platform to
another. aRrayLasso significantly predicts expression levels with similar
fidelity to technical replicates of the same RNA pool, demonstrating its utility
in the integration of datasets from different platforms. AVAILABILITY AND
IMPLEMENTATION: All functions are available, along with descriptions, at
https://github.com/adam-sam-brown/aRrayLasso. CONTACT:
chirag_patel@hms.harvard.edu. SUPPLEMENTARY INFORMATION: Supplementary data are
available at Bioinformatics online.