CAPE and MG132 have apoptotic and antiporliferative effecs on leukemic cells but not on normal monomuclear cells

CAVALIERE V; PAPADEMETRIO D; LORENZETTI M; VALVA P; PRECIADO MV; GARGALLO P; LARIPA I; MONREAL M; PARDO M; HAJOS S; BLANCO G; ÁLVAREZ É

TRANSLATIONAL ONCOLOGY

NEOPLASIA PRESS

Año: 2009 vol. 2 p. 46 - 58

1936-5233

Chemotherapy aims to limit proliferation and induce apoptotic cell death in tumor cells. Owing to blockade of signaling pathways involved in cell survival and proliferation, nuclear factor kB (NF-kB) inhibitors can induce apoptosis in a number of hematological malignancies. The efficacy of conventional chemotherapeutic drugs, such as vincristine (VCR) and doxorubicine (DOX), may be enhanced with combined therapy based on NF-kB modulation. In this study, we evaluated the effect of caffeic acid phenylethyl ester (CAPE) and MG-132, two nonspecific NF-kB inhibitors, and conventional chemotherapeutics drugs DOX and VCR on cell proliferation and apoptosis induction on a lymphoblastoid B-cell line, PL104, established and characterized in our laboratory. CAPE and MG-132 treatment showed a strong antiproliferative effect accompanied by clear cell cycle deregulation and apoptosis induction. Doxorubicine and VCR showed antiproliferative effects similar to those of CAPE and MG-132, although the latter drugs showed an apoptotic rate two-fold higher than DOX and VCR. None of the four compounds showed cytotoxic effect on peripheral mononuclear cells from healthy volunteers. CAPE- and MG-132?treated bone marrow cells from patients with myeloid and lymphoid leukemias showed 69% (P smaller than .001) and 25% decrease (P smaller than .01) in cell proliferation and 42% and 34% (P smaller than .01) apoptosis induction, respectively. Overall, our results indicate that CAPE and MG-132 had a strong and selective apoptotic effect on tumor cells thatmay be useful in future treatment of hematological neoplasias.