Table 1.

Summary of well-studied cancer-related circular RNAs

CircRNAs	Function	Cancer type	Reference
CDR1as	miR-7 sponge	Breast cancer	[41]
		Cervical cancer	[42]
		Schwannoma tumor	[43]
		Tongue cancer	[44]
		Lung neoplasm	[45]
		Gastric carcinoma	[46]
		Hepatocellular carcinoma	[47]
		Colorectal cancer	[48]
circ-ZEB1.5	miR-200 sponge	Lung cancer	[10]
circ-ZEB1.19
circ-ZEB1.17
circ-ZEB1.33
circRNA_1093	miR-342 sponge	Breast cancer	[15]
cir-ITCH	Inhibiting Wnt/β-catenin signaling	Esophageal squamous cell carcinoma	[24]
ci-sirt7	Enhance sirt7 expression	Pancreatic ductal adenocarcinoma	[17,71]
ci-mcm5	Enhance mcm5 expression	Oral squamous cell carcinoma	[17,72]
		Colorectal cancer	[17,73]
circ-Foxo3	Enhance Foxo3 translation	Breast cancer	[57]
hsa_circ_002059	Potential value biomarker	Gastric carcinoma	[78]
hsa_circ_0001649	Potential value biomarker	Hepatocellular carcinoma	[79]