PIK3R1 and cancer: There are three lncRNAs located close together in the interaction network: NONMMUG034109, NONMMUG021221, and NONMMUG008287; these are involved in the regulation of the mRNA expression of a large number of cancer-related genes, such as Pik3r1, Gulp1, Chrdl1, and Crebaf [63,64,65,66].