hsa-mir-22: hsa-mir-22 is a microRNA predominantly expressed in cardiac tissue, where it modulates gene expression related to hypertrophic processes, sarcomere organization, metabolic shifts, and is implicated in mechanisms of oxidative stress response, apoptosis of cardiomyocytes, autophagy, hypertrophy, fibrosis, and tissue regeneration [PMC8691998]. Experimental studies in HEK293 cells have demonstrated the functional interaction of hsa-mir-22 with specific reporter plasmids to elucidate its regulatory roles; for instance, cells were cotransfected with hsa-mir-22 mimic and reporter plasmids linked to the miR-22 promoter or target gene 3′UTR sequences to assess the miRNA's impact on gene expression [PMC6064715]. In the context of hepatocellular carcinoma (HCC), hsa-mir-22 was found to be downregulated in tissues with venous metastasis compared to those without metastasis [PMC6287006], suggesting its potential involvement in cancer progression and metastasis. The statement regarding hsa-mir-22's expression levels being quantified within a probiotic environment using data from both TCGA and GEO databases [PMC8806860] is not supported by the provided context and has been removed from the summary.