5 1 ®®Resistance to venetoclax (Venclexta and Venclyxto, Abbvie / Genentech), the $2.5 billion blockbuster Chronic Lymphocytic Leukemia (CLL) therapy, is emerging as a therapeutic challenge, with leukemic cells persisting over time, even with combination therapy 2,3Studies show that sphingosine kinase 2 (SPHK2) is overexpressed in venetoclax-resistant cancer cells and that SPHK2 inhibition may reduce T-cell-induced activation and proliferation of venetoclax-resistant CLL cancer cells and resensitize previou ...