Prognostic Relevance of Transforming Growth Factor-β Receptor Expression and Signaling in Glioblastoma, Isocitrate Dehydrogenase-Wildtype.

Abstract

The transforming growth factor (TGF)-β signaling pathway has been recognized as a major factor in promoting the aggressive behavior of glioblastoma, isocitrate dehydrogenase-wildtype. However, there is little knowledge about the expression of TGF-β receptors in glioblastoma. Here, we studied the expression patterns of TGF-β receptor II (TGFβRII), type I receptors activin receptor-like kinase (ALK)-5, and ALK-1, as well as of the transcriptional regulators inhibitor of differentiation (Id) 2, Id3, and Id4 in human glioblastoma. The expression of TGFβRII, ALK-5, and ALK-1 varied greatly, with TGFβRII and ALK-5 being the most abundant and ALK-1 being the least expressed receptor. None of the 3 receptors was preferentially expressed by tumor vasculature as opposed to the tumor bulk, indicating tumor bulk-governed mechanisms of TGF-β signaling with regard to glioblastoma-associated angiogenesis. A positive correlation was found between ALK-1 and Id2, suggesting that Id2, broadly expressed in the tumor cells, is a downstream target of this receptor-dependent pathway. Furthermore, there was a trend for high expression of ALK-5 or Id2 to be associated with inferior overall survival. Hence, we propose that ALK-5 may be used for patient stratification in future anti-TGF-β treatment trials and that Id2 might be a potential target for anti-TGF-β interventions.

• Authors: Claudio Togni, Emanuel Rom, Isabel Burghardt, Patrick Roth, Elisabeth J Rushing, Michael Weller, Dorothee Gramatzki
• Journal: Journal of neuropathology and experimental neurology (J Neuropathol Exp Neurol) Vol. 81 Issue 3 Pg. 225-235 (02 24 2022) ISSN: 1554-6578 [Electronic] England
• PMID: 35190826 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2022 American Association of Neuropathologists, Inc. All rights reserved.

Chemical References

• Receptors, Transforming Growth Factor beta
• Transforming Growth Factor beta
• Transforming Growth Factors
• Isocitrate Dehydrogenase
• Receptor Protein-Tyrosine Kinases
• Protein Serine-Threonine Kinases

Topics

• Glioblastoma (genetics)
• Humans
• Isocitrate Dehydrogenase (genetics)
• Prognosis
• Protein Serine-Threonine Kinases
• Receptor Protein-Tyrosine Kinases (metabolism)
• Receptors, Transforming Growth Factor beta (genetics, metabolism)
• Signal Transduction
• Transforming Growth Factor beta (metabolism)
• Transforming Growth Factors