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2017 ; 96
(42
): e7741
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Identifying key genes associated with acute myocardial infarction
#MMPMID29049183
Cheng M
; An S
; Li J
Medicine (Baltimore)
2017[Oct]; 96
(42
): e7741
PMID29049183
show ga
BACKGROUND: This study aimed to identify key genes associated with acute
myocardial infarction (AMI) by reanalyzing microarray data. METHODS: Three gene
expression profile datasets GSE66360, GSE34198, and GSE48060 were downloaded from
GEO database. After data preprocessing, genes without heterogeneity across
different platforms were subjected to differential expression analysis between
the AMI group and the control group using metaDE package. P?.05 was used as the
cutoff for a differentially expressed gene (DEG). The expression data matrices of
DEGs were imported in ReactomeFIViz to construct a gene functional interaction
(FI) network. Then, DEGs in each module were subjected to pathway enrichment
analysis using DAVID. MiRNAs and transcription factors predicted to regulate
target DEGs were identified. Quantitative real-time polymerase chain reaction
(RT-PCR) was applied to verify the expression of genes. RESULT: A total of 913
upregulated genes and 1060 downregulated genes were identified in the AMI group.
A FI network consists of 21 modules and DEGs in 12 modules were significantly
enriched in pathways. The transcription factor-miRNA-gene network contains 2
transcription factors FOXO3 and MYBL2, and 2 miRNAs hsa-miR-21-5p and
hsa-miR-30c-5p. RT-PCR validations showed that expression levels of FOXO3 and
MYBL2 were significantly increased in AMI, and expression levels of hsa-miR-21-5p
and hsa-miR-30c-5p were obviously decreased in AMI. CONCLUSION: A total of 41
DEGs, such as SOCS3, VAPA, and COL5A2, are speculated to have roles in the
pathogenesis of AMI; 2 transcription factors FOXO3 and MYBL2, and 2 miRNAs
hsa-miR-21-5p and hsa-miR-30c-5p may be involved in the regulation of the
expression of these DEGs.