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Review

Targeting TRAIL in the treatment of cancer: new developments

, , , , &
Pages 1171-1185 | Published online: 25 May 2015
 

Abstract

Introduction: While apoptosis is critical for maintaining homeostasis in normal cells, defective apoptosis contributes to the survival of cancer cells. TNF-related apoptosis-inducing ligand (TRAIL)-targeted therapy has attracted significant effort for treating cancer, but the clinical results have revealed limitations. The authors review the current status of development of TRAIL-targeted therapy with an outlook towards the future.

Areas covered: Recombinant human proteins, small molecules and agonistic monoclonal antibodies targeting death receptors that trigger TRAIL-mediated apoptosis are covered in this article. The authors review both intrinsic and extrinsic apoptotic pathways, highlighting how the apoptosis serves as a promising therapeutic target. They also review different categories of TRAIL pathway targeting agents and provide a brief overview of clinical trials using these agents. The authors discuss the limitations of conventional approaches for targeting the TRAIL pathway as well as future directions.

Expert opinion: The development of better combination partners for pro-apoptotic TRAIL pathway modulators including novel agents inhibiting anti-apoptotic molecules or targeting alternative resistance pathways may improve the chances for anti-tumor responses in the clinic. Developing predictive biomarkers via circulating tumor cells/DNA, apoptosis signal products, and genetic signatures/protein biomarkers from tumor tissue are also suggested as future directions.

Acknowledgements

WS El-Deiry is an American Cancer Society Research Professor. We apologize to colleagues whose original work could not be cited due to space constraints.

Declaration of interest

WS El-Deiry is a Founder and shareholder in Oncoceutics, a company that is developing a first-in-class TRAIL pathway activator. J Allen is an employee and shareholder in Oncoceutics. The other authors have no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending or royalties.

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