1. DKK1 is a predictive biomarker for response to DKN-01: Results of a phase 2 basket study in women with recurrent endometrial carcinoma.
- Author
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Arend R, Dholakia J, Castro C, Matulonis U, Hamilton E, Jackson CG, LyBarger K, Goodman HM, Duska LR, Mahdi H, ElNaggar AC, Kagey MH, Liu A, Piper D, Barroilhet LM, Bradley W, Sachdev J, Sirard CA, O'Malley DM, and Birrer M
- Subjects
- Female, Humans, Paclitaxel, Carcinoma, Ovarian Epithelial drug therapy, Carcinoma, Ovarian Epithelial etiology, Antibodies, Monoclonal therapeutic use, Biomarkers, Antineoplastic Combined Chemotherapy Protocols adverse effects, Intercellular Signaling Peptides and Proteins genetics, Antineoplastic Agents therapeutic use, Endometrial Neoplasms drug therapy, Endometrial Neoplasms genetics, Ovarian Neoplasms pathology
- Abstract
Purpose: Dickkopf-1 (DKK1) is a Wnt signaling modulator promoting tumor growth, metastasis, angiogenesis, and immunosuppression by regulating innate immunity. DKK1 is over-expressed in gynecologic cancers and is associated with shortened survival. DKN-01 is a humanized monoclonal antibody with DKK1 neutralizing activity that may provide clinical benefit to patients whose tumors have overexpression of DKK1 or Wnt genetic alterations., Methods: We conducted an open-label, Phase 2 basket study with 2-stage design in patients with endometrial carcinoma (EC) and platinum-resistant/refractory epithelial ovarian cancer. DKN-01 was administered either as monotherapy or in combination with weekly paclitaxel at investigator's discretion. All patients underwent NGS testing prior to enrollment; tumor tissue was also tested for DKK1 expression by RNAscope pre-treatment and after cycle 1 if available. At least 50% of patients were required to have a Wnt signaling alteration either directly or tangentially. This publication reports results from the EC population overall and by DKK1-expression., Results: DKN-01 monotherapy and in combination with paclitaxel was more effective in patients with high DKK1-expressing tumors compared to low-expressing tumors. DKN-01 monotherapy demonstrated an objective response rate [ORR] of 25.0% vs. 0%; disease control rate [DCR] of 62.5% vs. 6.7%; median progression-free survival [PFS] was 4.3 vs. 1.8 months, and overall survival [OS] was 11.0 vs. 8.2 months in DKK1-high vs DKK1-low patients. Similarly, DKN-01 in combination with paclitaxel demonstrated greater clinical activity in patients with DKK1-high tumors compared to DKK1-low tumors: DCR was 55% vs. 44%; median PFS was 5.4 vs. 1.8 months; and OS was 19.1 vs. 10.1 months. Wnt activating mutations correlated with higher DKK1 expression. DKN-01 was well tolerated as a monotherapy and in combination with paclitaxel., Conclusions: Collectively, data demonstrates promising clinical activity of a well-tolerated drug, DKN-01, in EC patients with high tumoral DKK1 expression which frequently corresponded to the presence of a Wnt activating mutation. Future development will focus on using DKN-01 in DKK1-high EC patients in combination with immunotherapy., Competing Interests: Declaration of Competing Interest Dr. Arend participates in Data Safety Monitoring/Advisory Boards (DSMB) for Astra Zeneca, Caris Life Sciences, Clovis, Merck, Seagen, Sutro, Glaxo Smith Kline, VBL Therapeutics. Dr. Matulonis reports relationships with the Med Learning Group and participates in DSMB for: Allarity, NextCure, Alkermes, Symphogen, Trillium, Agenus, Immunogen, Novartis, Boerhinger Ingelheim, Rivkin Foundation, Ovarian Cancer Research Alliance, Clearity Foundation, and Morphosys. Dr. Kagey and Dr. Sirard are employed by and own stock in Leap Therapeutics. Dr. Hamilton reports consulting or advisory for: Pfizer (Inst), Genentech/Roche (Inst), Lilly (Inst), Puma Biotechnology (Inst), Daiichi Sankyo (Inst), Mersana (Inst), Boehringer Ingelheim (Inst), AstraZeneca (Inst), Novartis (Inst), Silverback Therapeutics (Inst), Black Diamond (Inst). Dr. Sachdev participates in DSMB for Pfizer, Immunomedics, AstraZeneca, Tempus, and Ipsen; discloses stock/options in Biosplice Therapeutics; and is employed by Biosplice Therapeutics. Dr. Duska reports royalties from JB Learning, consulting fees from UpToDate, serves as an expert law review, and participates in DSMB for Regeneron and Inovio. She reports leadership in SGO, ASCO, the NCI, and the British Journal of OBGYN. Dr. ElNaggar reports employment and stock/options with Natera. Ms. Liu and Ms. Piper were employed by LEAP Therapeutics during manuscript preparation. Dr. O'Malley participates in DSMB for: AbbVie, AdaptImmune, Agenus, Arquer Diagnostics, Arcus Biosciences, AstraZeneca, Atossa Therapeutics, Boston Biomedical, Cardiff Oncology, Celcuity, Clovis Oncology, Corcept Therapeutics, Duality Biom, Eisai, Elevar, Exelixis, Genentech, Genelux, GlaxoSmithKline, GOG Foundation, Hoffman-LaRoche, ImmunoGen, Imvax, InterVenn, INXMED, IOVANCE Biotherapeutics, Janssen, Laekna, Leap Therapeutics, Luzsana Biotechnology, Merck, Merck Sharp & Dohme, Mersana, Myriad, Novartis, NovoCure, OncoC4, Onconova, Regeneron, RepImmune, R Pharm, Roche, SeaGen, Sorrento, Sutro, Tarveda, Toray, Trillium, Umoja, Verastem, VBL Therapeutics, Vincerx, Xencor, Zentalis. All other authors report no disclosures., (Copyright © 2023 Elsevier Inc. All rights reserved.)
- Published
- 2023
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