Functional enrichment analysis
The DEGs were analyzed by DAVID database(https://david.ncfcrf.gov), an
online tool providing a functional annotation of genes and discover
enriched functional-related gene group [21]. The Gene Ontology (GO)
constructs the annotation of genes, gene products and sequence [22].
KEGG pathway analysis was carried out to explore the gene linking
functional and genomic information [23]. P<0.05 were
considered significant.