TP53 and cancer: Among the newly associated miRNAs are: miR-200 family members (miR-200c-3p, miR-200a-3p, miR-200b-3p, miR-429, miR-141-3) widely investigated as prognostic and diagnostic biomarkers for cancer [36]; miR-192/215 shown to be involved in cancer-related p53 network [37, 38]; and miR-375 shown to be down-regulated in gastric cancer and to affect cell proliferation [39].