In breast cancer cells, it was shown that the expression of the hypoxia-induced mitochondrial lncRNA MTORT1 (encoded from 15997 to 16569 site, spanning the MT-TP gene and the D-loop region) was lower compared to non-cancer cells, and that the lncRNA is involved in cellular growth and proliferation (Cheng et al., 2021). This evidence concerns the gene MCAT and breast carcinoma.