Abstract
ABSTRACT Introduction The Wnt/beta-catenin pathway is a complex signaling pathway known to be dysregulated in several cancers; Dickkopf-1 (Dkk1) is an inhibitor of canonical Wnt signaling via negative feedback. Elevated Dkk1 is associated with a poor prognosis in several cancers, including gynecologic and gastroesophageal malignancies. This review focuses on the potential therapeutic benefit of targeting Dkk1 with the IgG4 monoclonal antibody, DKN-01. Areas covered We highlight current treatment approaches for advanced gynecologic and esophageal malignancies highlighting the need for more effective therapies, specifically improved immune-modulating agents and combinations. Our discussion of DKN-01 addresses the rationale for targeting Dkk1, available safety, pharmacokinetic and efficacy data. Expert opinion DKN-01 presents an interesting therapeutic consideration in advanced gynecologic and gastroesophageal malignancies. It has been especially promising in patients with high-Dkk1-expressing tumors or known Wnt mutations. We postulate that the complementary mechanisms, limited adverse effects and emerging biomarker data position DKN-01 as a promising agent for combination therapy in patients with advanced malignancies. Specifically, we believe this occurs through an immuno-modulatory effect, primarily acting through the innate arm of the immune system. This highlights the possibility for addressing innate immune resistance and expanding the portion of patients who may benefit, possibly in a biomarker-selected manner.
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