Fig. 4From: Rise of the natural red pigment ‘prodigiosin’ as an immunomodulator in cancerThe inhibitory effect of prodigiosin on mTOR and COX-2/PGE-2 pathways that further sensitise tumour cells to drugs. COX-2, cyclooxygenase-2; CSCs, cancer stem cells; EMT, epithelial-mesenchymal transition; PGE-2, prostaglandin E2; MDSCs, myeloid-derived suppressor cells; mTOR, mammalian target of rapamycin; TAM, tumour-associated macrophagesBack to article page