STAT3 and neoplasm: The MSCs suppress tumour growth by inhibiting the signalling pathways associated with proliferation (e.g., STAT3, AKT, PI3K, and Wnt signalling pathways), cell cycle progression [13,52,60,63,64,65,66], the inhibition of apoptosis, and the suppression of angiogenesis [13,25,41,52,59,60,61,62,63,67,68,69,70,71,72].