NFκB Pathway and microRNA-9 and -21 are Involved in Sensitivity to the Pterocarpanquinone LQB-118 in Different CML Cell Lines
Fernanda Costas C. de Faria,
Maria Eduarda Bento Leal,
Paula Sabbo Bernardo,
Paulo R.R. Costa,
Raquel C. Maia.
Chronic myeloid leukemia (CML), a myeloproliferative disorder characterized by the BCR-ABL
oncoprotein, presents its treatment based on tyrosine kinase inhibitors (TKIs), mainly imatinib. However, despite its
clinical success, almost 30% of all CML patients demand alternative therapy. In this context, the development of drugs
capable of overcoming TKIs resistance is imperative. The pterocarpanquinone-LQB-118 is a novel compound with
anti-tumor effect in CML cells whose mechanism of action is being elucidated. Here, we demonstrate that in two CML cell lines
exhibiting different biological characteristics, LQB-118 modulates NFκB subcellular localization, apparently independently of the AKT
and MAPK pathways, partially inhibits proteasome activity, and alters the expression of microRNAs -9 and -21.
Keywords: Cancer, chronic myeloid leukemia, microRNA, multidrug resistance phenotype, NFκB, pterocarpanquinone-LQB-118.
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