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A pilot study of JI-101, an inhibitor of VEGFR-2, PDGFR-β, and EphB4 receptors, in combination with everolimus and as a single agent in an ovarian cancer expansion cohort

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Summary

JI-101 is an oral multi-kinase inhibitor that targets vascular endothelial growth factor receptor type 2 (VEGFR-2), platelet derived growth factor receptor β (PDGFR-β), and ephrin type-B receptor 4 (EphB4). None of the currently approved angiogenesis inhibitors have been reported to inhibit EphB4, and therefore, JI-101 has a novel mechanism of action. We conducted a pilot trial to assess the pharmacokinetics (PK), tolerability, and efficacy of JI-101 in combination with everolimus in advanced cancers, and pharmacodynamics (PD), tolerability, and efficacy of JI-101 in ovarian cancer. This was the first clinical study assessing anti-tumor activity of JI-101 in a combinatorial regimen. In the PK cohort, four patients received single agent 10 mg everolimus on day 1, 10 mg everolimus and 200 mg JI-101 combination on day 8, and single agent 200 mg JI-101 on day 15. In the PD cohort, eleven patients received single agent JI-101 at 200 mg twice daily for 28 day treatment cycles. JI-101 was well tolerated as a single agent and in combination with everolimus. No serious adverse events were observed. Common adverse events were hypertension, nausea, and abdominal pain. JI-101 increased exposure of everolimus by approximately 22 %, suggestive of drug-drug interaction. The majority of patients had stable disease at their first set of restaging scans (two months), although no patients demonstrated a response to the drug per RECIST criteria. The novel mechanism of action of JI-101 is promising in ovarian cancer treatment and further prospective studies of this agent may be pursued in a less refractory patient population or in combination with cytotoxic chemotherapy.

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Acknowledgments

The authors would like to thank the study participants and their families, as well as the research coordinators. We would like to acknowledge Joely Straseski, PhD, who analyzed the plasma VEGF samples.

Funding

This work was supported by a grant from Vanthys Pharmaceutical Development.

Conflict of interest

Neeraj Agarwal: Research support to the institution from Amgen, Bayer, Bristol Myers Squibb, GlaxoSmithKline, Imclone, Medivation, Takeda, Novartis, Pfizer.

Sunil Sharma: Research support to the institution from Novartis, Spectrum, GlaxoSmithKline, Merrimack, Millennium, Takeda, Amgen, LSK Biopartners, Mirati, MedImmune, Johnson & Johnson, Gilead Sciences, Plexxikon, Celgene, Sanofi, Onyx, Bayer; and financial interest in Beta Cat Pharmaceuticals, Salarius, and ConverGene.

Theresa L. Werner: Research support to the institution from Abbvie, Amgen, Bayer, GlaxoSmithKline, Novartis, Roche-Genentech, Pfizer.

The other authors have declared no conflicts of interest.

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Correspondence to Theresa L. Werner.

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Werner, T.L., Wade, M.L., Agarwal, N. et al. A pilot study of JI-101, an inhibitor of VEGFR-2, PDGFR-β, and EphB4 receptors, in combination with everolimus and as a single agent in an ovarian cancer expansion cohort. Invest New Drugs 33, 1217–1224 (2015). https://doi.org/10.1007/s10637-015-0288-5

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  • DOI: https://doi.org/10.1007/s10637-015-0288-5

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