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2016 ; 113
(17
): E2393-402
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Immuno-Navigator, a batch-corrected coexpression database, reveals cell
type-specific gene networks in the immune system
#MMPMID27078110
Vandenbon A
; Dinh VH
; Mikami N
; Kitagawa Y
; Teraguchi S
; Ohkura N
; Sakaguchi S
Proc Natl Acad Sci U S A
2016[Apr]; 113
(17
): E2393-402
PMID27078110
show ga
High-throughput gene expression data are one of the primary resources for
exploring complex intracellular dynamics in modern biology. The integration of
large amounts of public data may allow us to examine general dynamical
relationships between regulators and target genes. However, obstacles for such
analyses are study-specific biases or batch effects in the original data. Here we
present Immuno-Navigator, a batch-corrected gene expression and coexpression
database for 24 cell types of the mouse immune system. We systematically removed
batch effects from the underlying gene expression data and showed that this
removal considerably improved the consistency between inferred correlations and
prior knowledge. The data revealed widespread cell type-specific correlation of
expression. Integrated analysis tools allow users to use this correlation of
expression for the generation of hypotheses about biological networks and
candidate regulators in specific cell types. We show several applications of
Immuno-Navigator as examples. In one application we successfully predicted known
regulators of importance in naturally occurring Treg cells from their expression
correlation with a set of Treg-specific genes. For one high-scoring gene,
integrin ?8 (Itgb8), we confirmed an association between Itgb8 expression in
forkhead box P3 (Foxp3)-positive T cells and Treg-specific epigenetic remodeling.
Our results also suggest that the regulation of Treg-specific genes within Treg
cells is relatively independent of Foxp3 expression, supporting recent results
pointing to a Foxp3-independent component in the development of Treg cells.