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. Author manuscript; available in PMC: 2017 Dec 1.
Published in final edited form as: Int J Biochem Cell Biol. 2016 May 6;81(Pt A):184–194. doi: 10.1016/j.biocel.2016.05.005

Figure 4. Signal transduction pathways regulated by CD47 in cancer stem cells.

Figure 4

CSCs can be separated from differentiated cancer cells and typically express CD47 at a 2–4-fold higher level. CSC are typically less adherent. Studies in breast, liver, and pancreatic cancers have shown that decreasing CD47 expression in CSC or exposure to CD47 ligands including TSP1 and the antibody B6H12 convert CSC to differentiated cancer cells with a resulting decrease in expression of stem cell markers (e.g. cKit, Klf4, CD133, SSEA1), loss of asymmetric division, increased NFκB activation, and in some cases increased cell death. The Hif pathway has been implicated in the elevated expression of CD47 in CSC.