PLIN4 and neoplasm: Along with the best-known expressed circRNAs, such as the Cerebellar Degeneration-Related protein 1 antisense RNA (CDR1as) which targets the tumor suppressor miR-7 [117], they have identified six novel uncharacterized circRNAs derived from IFFO2, PLIN4, DMKN, METRNL, KRT1 and POF1B genes, with an abundance of circ_IFFO2 and circ_PLIN4 in the normal skin [33].