Figure 6.
Schematic representation of soluble calreticulin (sCRT) activity on tumorigenesis. When sCRT or its fragment was released from tumors under pressure, sCRT showed a protumorigenesis activity, because of accumulation of Gr1+ myeloid derived suppressor cells (G-MDSCs) in vivo. The possible molecular mechanisms include: (a) sCRT could recruit MDSCs in tumor sites from blood; (b) IMC in bone marrow expanding when stimulated by sCRT; (c) the apoptosis of MDSCs could also be inhibited by sCRT; and (d) differentiation of MDSCs toward DC could be inhibited by sCRT.