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Caspase function is known to be essential for cell death by apoptosis, but it is now increasingly recognized that these proteases also play important roles in other cellular events. Here we report for the first time that inhibition of cellular caspase activity can induce differentiation of AML blasts, and can enhance vitamin D-induced cell differentiation of these cells. This was studied in blasts...
1,25-Dihydroxyvitamin D 3 (1,25D) induces differentiation of myeloid leukemia cells, but resistant cells are also encountered. We studied the mechanistic basis for the resistance in a model system using enhancers of 1,25D, the antioxidant carnosic acid and a kinase inhibitor SB202190. Knock-down (KD) of JNK2p54 unexpectedly increased the intensity of differentiation induced by the 1,25D, carnosic...
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