I have 16S microbiome data and RNAseq data for the same tissue. Both samples were collected at the same time and I would like to integrate them. The idea is to investigate the effect that the microbiome has on the tissue’s transcriptome.
This is a pretty loaded question and the process quite complex, but I think perhaps building a co-occurrence network using mmvec might be a good first step, see original paper here for some use-cases with microbiome +metabolite data. Note that co-occurrence != causation, so even if you do find some interesting patterns, unless you can support with other experiments/data there really is no way of saying the microbiome is directly affecting the transcriptome, unless perhaps you have some very controlled experiment design.