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2017 ; 7
(1
): 9091
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Identification of novel molecular signatures of IgA nephropathy through an
integrative -omics analysis
#MMPMID28831120
Krochmal M
; Cisek K
; Filip S
; Markoska K
; Orange C
; Zoidakis J
; Gakiopoulou C
; Spasovski G
; Mischak H
; Delles C
; Vlahou A
; Jankowski J
Sci Rep
2017[Aug]; 7
(1
): 9091
PMID28831120
show ga
IgA nephropathy (IgAN) is the most prevalent among primary glomerular diseases
worldwide. Although our understanding of IgAN has advanced significantly, its
underlying biology and potential drug targets are still unexplored. We
investigated a combinatorial approach for the analysis of IgAN-relevant -omics
data, aiming at identification of novel molecular signatures of the disease. Nine
published urinary proteomics datasets were collected and the reported
differentially expressed proteins in IgAN vs. healthy controls were integrated
into known biological pathways. Proteins participating in these pathways were
subjected to multi-step assessment, including investigation of IgAN
transcriptomics datasets (Nephroseq database), their reported protein-protein
interactions (STRING database), kidney tissue expression (Human Protein Atlas)
and literature mining. Through this process, from an initial dataset of 232
proteins significantly associated with IgAN, 20 pathways were predicted, yielding
657 proteins for further analysis. Step-wise evaluation highlighted 20 proteins
of possibly high relevance to IgAN and/or kidney disease. Experimental validation
of 3 predicted relevant proteins, adenylyl cyclase-associated protein 1 (CAP1),
SHC-transforming protein 1 (SHC1) and prolylcarboxypeptidase (PRCP) was performed
by immunostaining of human kidney sections. Collectively, this study presents an
integrative procedure for -omics data exploitation, giving rise to biologically
relevant results.