Abstract
Purpose
ATI-1123 is a liposomal formulation of docetaxel and may be administered without the premedications and hypersensitivity reactions. This Phase I study examines the safety, tolerability, pharmacokinetics (PKs), and antitumor activity of ATI-1123.
Methods
Patients with advanced solid malignancies received escalating doses of ATI-1123 intravenously over 1-h every 3 weeks. The dosing commenced using an accelerated titration design and was followed by a modified 3 + 3 Fibonacci schema to determine maximally tolerated dose (MTD). Plasma was analyzed for encapsulated/non-encapsulated docetaxel; PK analyses were performed using model independent method. Response was assessed using RECIST criteria.
Results
In total, 29 patients received doses ranging from 15 to 110 mg/m2. At 110 mg/m2, two of six patients experienced dose-limiting toxicities including grade 3 stomatitis and febrile neutropenia. The 90 mg/m2 cohort was expanded to ten patients and identified as the MTD. The most common adverse events were fatigue, nausea, neutropenia, anemia, anorexia, and diarrhea. ATI-1123 exhibited linear and dose proportional PKs. One patient with lung cancer had confirmed partial response, and stable disease was observed in 75 % patients.
Conclusions
ATI-1123 demonstrated an acceptable tolerability and favorable PK profile in patients with solid tumors. Our results provide support for Phase II trials to determine the antitumor activity of this drug.
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Acknowledgments
The authors wish to express their deep appreciation to Ms. Susan Beardslee for reviewing the manuscript and providing very valuable comments. This study was sponsored by Azaya Therapeutics.
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Mahalingam, D., Nemunaitis, J.J., Malik, L. et al. Phase I study of intravenously administered ATI-1123, a liposomal docetaxel formulation in patients with advanced solid tumors. Cancer Chemother Pharmacol 74, 1241–1250 (2014). https://doi.org/10.1007/s00280-014-2602-x
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DOI: https://doi.org/10.1007/s00280-014-2602-x