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Review
. 2013 Feb 15;85(4):478-85.
doi: 10.1016/j.bcp.2012.11.005. Epub 2012 Nov 14.

TGF-β as a therapeutic target in high grade gliomas - promises and challenges

Justin V Joseph  1 , Veerakumar Balasubramaniyan, Annemiek Walenkamp, Frank A E Kruyt
Affiliations
Review

TGF-β as a therapeutic target in high grade gliomas - promises and challenges

Justin V Joseph et al. Biochem Pharmacol. .

Abstract

Transforming growth factor-β (TGF-β) is a cytokine with a key role in tissue homeostasis and cancer. TGF-β elicits both tumor suppressive and tumor promoting functions during cancer progression, in a wide range of cancers. Here, we review the tumor promoting function of TGF-β and its possible promise as a therapeutic target in high grade gliomas, including glioblastoma multiforme (GBM), a disease with very poor prognosis. TGF-β signaling is highly active in high grade gliomas and elevated TGF-β activity has been associated with poor clinical outcome in this deadly disease. Common features of GBMs include fast cell proliferation, invasion into normal brain parenchyma, hypoxia, high angiogenic - and immunosuppressive activity, characteristics that all have been linked to activation of the TGF-β pathway. TGF-β signaling has also been connected with the cancer stem cell (CSC) phenotype in GBM. CSCs represent a subset of GBM cells thought to be responsible for tumor initiation, progression and relapse of disease. Following the description of these different properties of TGF-β signaling and the underlying mechanisms identified thus far, the promise of TGF-β targeted therapy in malignant gliomas is discussed. Several drugs targeting TGF-β signaling have been developed that showed potent antitumor activity in preclinical models. A number of agents are currently evaluated in early clinical studies in glioma patients. Available results of these studies are highlighted and a perspective on the promise of TGF-β-targeted therapy is given.

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