TP53 and gastric cancer: Further investigation demonstrated that TMEM44‐AS1 can be a sponge for miR‐2355‐5p, leading to the upregulating of PPP1R13L expression and the inhibition of the P53 signaling pathway, and further indicating that TMEM44‐AS1 was the candidate prognostic marker and potential therapeutic target in 5‐FU‐resistant GC patients.