Preclinical Evaluation of Combined Targeted Approaches in Malignant Rhabdoid Tumors.

Abstract:

BACKGROUND/AIM:Rhabdoid tumors (RT) are aggressive pediatric tumors, which show poor prognosis despite use of multimodal intensive therapy. In these tumors, several different oncogenic pathways and epigenetic regulators (like CDK4/6-cyclinD-Rb-signaling, EZH2, histone deacetylases) are contemporaneously deregulated as a consequence of biallelic SMARCB1/SNF5/INI1 alterations. Since these tumors are highly resistant to current therapies, alternative treatment strategies are urgently required. MATERIALS AND METHODS:In this study, we evaluated cytotoxic effects (by MTT tests) of small molecular compounds, which specifically target these deregulated pathways, using either single-drug or combined approaches. Half-maximal inhibitory concentration (IC50) and combined index (CI) were calculated. RESULTS:All target-directed inhibitors blocked cell growth of three different rhabdoid tumor cell lines in vitro. Several combinations of those target-specific drugs synergistically inhibited cell proliferation of rhabdoid tumors. CONCLUSION:Supporting earlier reports, combined target-directed approaches are a promising tool for the therapy of malignant rhabdoid tumors.

journal_name

Anticancer Res

journal_title

Anticancer research

authors

Moreno N,Kerl K

subject

Has Abstract

pub_date

2016-08-01 00:00:00

pages

3883-7

issue

8

eissn

0250-7005

issn

1791-7530

pii

36/8/3883

journal_volume

36

pub_type

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