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. 2024 Jul 5;9:170. doi: 10.1038/s41392-024-01851-y

Fig. 2.

Fig. 2

Origin, formation and/or maintenance of CSCs. CSCs originate from differentiated normal/cancer cells, stem/progenitor cells, or cell-cell fusion of cancer cells with stem cells or cancer cells with differentiated cells. The microenvironment of the CSC niche plays an essential role in the formation and maintenance of CSCs. MSCs, TAMs, MDSCs, and CAFs can secrete cytokines and chemokines that induce and/or maintain stem-like properties of cancer cells. Besides, CAFs can also modulate stemness by secreting EVs, and MSCs can regulate stemness through direct contact with CSCs. Finally, hypoxia and high nitric oxide (NO) concentration also support the CSC niche