Endoplasmic reticulum stress-related protein expression levels are negatively associated with lncRNA NEAT1 expression in gastric cancer tissues. (A) Linear regression was performed to detect the association between endoplasmic reticulum stress-, autophagy- and apoptosis-related protein expression levels and lncRNA NEAT1 expression levels. (B) Linear regression was performed to detect the association between endoplasmic reticulum stress-, autophagy- and apoptosis-related protein expression levels and miR-500a expression levels. lncRNA, long non-coding RNA; NEAT1, nuclear paraspeckle assembly transcript 1; miR, microRNA; GRP78, 78-kDa glucose-regulated protein; XBP-1, X-box binding protein-1; Atg5, autophagy-related gene 5; ERs, endoplasmic reticulum stress.