Anti-invasive adjuvant therapy with imipramine blue enhances chemotherapeutic efficacy against glioma.

Abstract:

:The invasive nature of glioblastoma (GBM) represents a major clinical challenge contributing to poor outcomes. Invasion of GBM into healthy tissue restricts chemotherapeutic access and complicates surgical resection. Here, we test the hypothesis that an effective anti-invasive agent can "contain" GBM and increase the efficacy of chemotherapy. We report a new anti-invasive small molecule, Imipramine Blue (IB), which inhibits invasion of glioma in vitro when tested against several models. IB inhibits NADPH (reduced form of nicotinamide adenine dinucleotide phosphate) oxidase-mediated reactive oxygen species generation and alters expression of actin regulatory elements. In vivo, liposomal IB (nano-IB) halts invasion of glioma, leading to a more compact tumor in an aggressively invasive RT2 syngeneic astrocytoma rodent model. When nano-IB therapy was followed by liposomal doxorubicin (nano-DXR) chemotherapy, the combination therapy prolonged survival compared to nano-IB or nano-DXR alone. Our data demonstrate that nano-IB-mediated containment of diffuse glioma enhanced the efficacy of nano-DXR chemotherapy, demonstrating the promise of an anti-invasive compound as an adjuvant treatment for glioma.

journal_name

Sci Transl Med

authors

Munson JM,Fried L,Rowson SA,Bonner MY,Karumbaiah L,Diaz B,Courtneidge SA,Knaus UG,Brat DJ,Arbiser JL,Bellamkonda RV

doi

10.1126/scitranslmed.3003016

subject

Has Abstract

pub_date

2012-03-28 00:00:00

pages

127ra36

issue

127

eissn

1946-6234

issn

1946-6242

pii

4/127/127ra36

journal_volume

4

pub_type

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