Table 3.

Tumor derived exosome miRNA on tumor MDSCs.

MiRNAs	Target genes/signal pathways	Function on MDSCs	Tumor	Ref.
miR-29a miR-92a	PDCD4/STAT3	To improve differentiation	Glioma	(75)
miR-10a/miR-21	Dicer1/PTEN	To enhance the expansion/activation	Glioma	(77)
miR-21a	SOCS3/PIAS3/JAK/STAT	To exaggerate the proliferation/immunosuppressive functions	LLC	(76)
miR-9/miR-181a	RORA/PTEN	To promote the proliferation and activity	Breast cancer	(76)
miR-107		To induce the proliferation/activation	Gastric cancer	(78)
miR-let-7i	IL-6/IL-17/IL-1b	To restrain the roles	Pancreatic cancer	(74)