MACC1 and gastric cancer: Several oncogenic lncRNAs, such as metastasis associated in colon cancer 1-antisense 1 (MACC1-AS1), Plasmacytoma variant translocation 1 (PVT1), and HOXD antisense growth-associated long noncoding RNA (HAGLR), can promote the 5-FU resistance of GC cells.