ZFAS1 and breast cancer: Concerning this aspect, the information in literature is very limited: to the best of knowledge, the involvement of lncRNAs in ribosome biogenesis has already been described only in breast cancer cells for lncRNA ZFAS1, whose expression is strongly correlated with that of a number of mRNAs encoding ribosomal proteins involved in ribosome biogenesis, and its abundance also increases upon induced ribosome biogenesis [38].