Effect Of MYD88 Mutation
Tesar B, Klitgaard J, Chaudhary D, et al




Key Points:
  • MYD88 L265P mutations occur in approximately 30% of ABC diffuse large B cell lymphomas (ABC DLBCL) and 90% of Waldenstrom’s macroglobulinemia (WM)

  • MYD88 L265P mutations occur in ~2.9-6.25% of CLL, although role in CLL not clearly understood

  • MYD88 L265P mutations: associated with higher viability

  • Cells treated with ND-2158 + ibrutinib had significantly lower viability compared to cells treated with ND-2158 alone

  • Co-culturing CLL cells and NIH3T3 cells expressing CD40L, with and without CpG stimulation in one WT MYD88 CLL patient resulted in significant induction of Ki67 expression, which was reduced by combination of either ND-2110 or 2158 with ibrutinib.

Implications:

  • IRAK4 inhibitors in combination with ibrutinib have interesting activity in CLL, possibly related to MYD88 L265P mutation status.

View the original abstract on the ASH website.






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