mir-625 microrna precursor family mir-625 microrna precursor family in molecular biology mir-625 microrna is a short rna molecule. micrornas function to regulate the expression levels of other genes by several mechanisms. many micrornas play important roles in cancer development and progression. mir-625identifierssymbolmir-625rfamrf01017 mirbase familymipf0000534other datarna typemicrornadomain(s)eukaryota;pdb structurespdbe mir-625 and gastric cancer mir-625 has been shown to be down regulated in gastric cancers. this is important, as mir-625 is responsible for the regulation of metastasis in gastric tumour cells, and therefore downregulation of mir-625 results in increased metastasis. mir-625 is thought to act by inhibiting the ilk protein.