Is it possible to do co expression analysis of genes (of interest from literature survey). The papers I have gone through marks that only after RNA-seq data or microaarray data we can perform a Co-expression analysis.

But is it possible that I select a group of genes from literature survey and then analyse it for co-expression analysis.

Basically, I want to find a set of genes that may be over/under-expressed with my gene of interest through literature survey and then do a qRT-PCR for those genes to see its expression pattern.

Any help will be appreciated.

Thanks