Title : Up-regulation of P21 inhibits TRAIL-mediated extrinsic apoptosis, contributing resistance to SAHA in acute myeloid leukemia cells.

Pub. Date : 2014

PMID : 25116350






8 Functional Relationships(s)
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1 Up-regulation of P21 inhibits TRAIL-mediated extrinsic apoptosis, contributing resistance to SAHA in acute myeloid leukemia cells. Vorinostat H3 histone pseudogene 16 Homo sapiens
2 In this study we examined the effect of altered p21 expression on the sensitivity of acute myeloid leukemia cells in response to HDAC inhibitor SAHA treatment and investigated the underlying mechanism. Vorinostat H3 histone pseudogene 16 Homo sapiens
3 Enforced expression of p21 in HL60 cells reduced sensitivity to SAHA and blocked TRAIL-mediated apoptosis. Vorinostat H3 histone pseudogene 16 Homo sapiens
4 Conversely, p21 silencing in NB4 cells enhanced SAHA-mediated apoptosis and lethality. Vorinostat H3 histone pseudogene 16 Homo sapiens
5 Finally, we found that combined treatment with SAHA and rapamycin down-regulated p21 and enhanced apoptosis in AML cells. Vorinostat H3 histone pseudogene 16 Homo sapiens
6 CONCLUSION: We conclude that up-regulated p21 expression mediates resistance to SAHA via inhibition of TRAIL apoptotic pathway. Vorinostat H3 histone pseudogene 16 Homo sapiens
7 P21 may serve as a candidate biomarker to predict responsiveness or resistance to SAHA-based therapy in AML patients. Vorinostat H3 histone pseudogene 16 Homo sapiens
8 In addition, rapamycin may be an effective agent to override p21-mediated resistance to SAHA in AML patients. Vorinostat H3 histone pseudogene 16 Homo sapiens