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Learn MoreWhile multiple myeloma patient prognosis has improved over the past decade, research towards discovery of new therapeutic avenues is important, and could lead to a cure for this chronic plasma cell malignancy. Data analysis from a myeloma patient database shows that the CD28-CD86 signaling module may provide a survival advantage in myeloma cells that negatively impacts patient outcome. Here we show that blocking the CD28-CD86 pathway, by silencing or with CTLA-4-Ig, leads to myeloma cell death. Blockade of this pathway leads to downregulation of nutrient transporters, integrins, and IRF4, a known myeloma survival factor. Our data also indicate that CD86, the canonical "ligand" in this pathway, is mediating a pro-survival signal via the cytosolic domain that has not been previously described. These findings indicate that blockade of this pathway is a promising therapeutic avenue for myeloma, as it leads to modulation of different processes important in cell viability. SOURCE: Benjamin,G,Barwick (benjamin.barwick@emory.edu) - Boise and Vertino Labs Emory University
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