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Schultheis B, Strumberg D, Santel A, Vank C, Gebhardt F, Keil O, Lange C, Giese K, Kaufmann J, Khan M, Drevs J. First-in-human phase I study of the liposomal RNA interference therapeutic Atu027 in patients with advanced solid tumors. J Clin Oncol 2014; 32:4141-8. [PMID: 25403217 DOI: 10.1200/jco.2013.55.0376] [Citation(s) in RCA: 172] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
PURPOSE Atu027 is a novel liposomal RNA interference therapeutic that includes a short-interfering RNA (siRNA), which silences expression of protein kinase N3 in the vascular endothelium. Atu027 has previously been shown to inhibit local tumor invasion as well as lymph node and pulmonary metastasis in mouse cancer models. This first-in-human study aimed to assess the safety, tolerability, and pharmacokinetics of Atu027 while evaluating therapeutic effects on both primary tumors and metastatic lesions. PATIENTS AND METHODS Thirty-four patients with advanced solid tumors received 10 escalating doses of Atu027 without premedication, as one single followed by eight intravenous infusions twice per week during a 28-day cycle. Response was monitored by computed tomography/magnetic resonance imaging at baseline, at the end of treatment (EoT), and at final follow-up (EoS), and was assessed according to RECIST. RESULTS Atu027 was well tolerated up to dose levels of 0.336 mg/kg; most adverse events (AEs) were low-grade toxicities (grade 1 or 2). No maximum tolerated dose was reached. Plasma levels of siRNA strands and lipids were dose proportional, peaking during 4-hour infusion. Disease stabilization was achieved in 41% of patients at EoT (n = 14 of 34 treated patients); eight patients had stable disease at EoS, and some experienced complete or partial regression of metastases. sFLT1 (soluble variant of vascular endothelial growth factor receptor-1) decreased from pretreatment levels in most patients after dose levels 04 to 10. CONCLUSION Atu027 was safe in patients with advanced solid tumors, with 41% of patients having stable disease for at least 8 weeks. In view of these results, further clinical trials have been initiated, and sFLT1 will be investigated as a potential biomarker.
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Affiliation(s)
- Beate Schultheis
- Beate Schultheis and Dirk Strumberg, Marienhospital Herne/University of Bochum, Herne; Ansgar Santel, Christiane Vank, Frank Gebhardt, Oliver Keil, Christian Lange, Klaus Giese, Jörg Kaufmann, and Michael Khan, Silence Therapeutics, Berlin; and Joachim Drevs, UniFontis Clinic, Tübingen, Germany
| | - Dirk Strumberg
- Beate Schultheis and Dirk Strumberg, Marienhospital Herne/University of Bochum, Herne; Ansgar Santel, Christiane Vank, Frank Gebhardt, Oliver Keil, Christian Lange, Klaus Giese, Jörg Kaufmann, and Michael Khan, Silence Therapeutics, Berlin; and Joachim Drevs, UniFontis Clinic, Tübingen, Germany.
| | - Ansgar Santel
- Beate Schultheis and Dirk Strumberg, Marienhospital Herne/University of Bochum, Herne; Ansgar Santel, Christiane Vank, Frank Gebhardt, Oliver Keil, Christian Lange, Klaus Giese, Jörg Kaufmann, and Michael Khan, Silence Therapeutics, Berlin; and Joachim Drevs, UniFontis Clinic, Tübingen, Germany
| | - Christiane Vank
- Beate Schultheis and Dirk Strumberg, Marienhospital Herne/University of Bochum, Herne; Ansgar Santel, Christiane Vank, Frank Gebhardt, Oliver Keil, Christian Lange, Klaus Giese, Jörg Kaufmann, and Michael Khan, Silence Therapeutics, Berlin; and Joachim Drevs, UniFontis Clinic, Tübingen, Germany
| | - Frank Gebhardt
- Beate Schultheis and Dirk Strumberg, Marienhospital Herne/University of Bochum, Herne; Ansgar Santel, Christiane Vank, Frank Gebhardt, Oliver Keil, Christian Lange, Klaus Giese, Jörg Kaufmann, and Michael Khan, Silence Therapeutics, Berlin; and Joachim Drevs, UniFontis Clinic, Tübingen, Germany
| | - Oliver Keil
- Beate Schultheis and Dirk Strumberg, Marienhospital Herne/University of Bochum, Herne; Ansgar Santel, Christiane Vank, Frank Gebhardt, Oliver Keil, Christian Lange, Klaus Giese, Jörg Kaufmann, and Michael Khan, Silence Therapeutics, Berlin; and Joachim Drevs, UniFontis Clinic, Tübingen, Germany
| | - Christian Lange
- Beate Schultheis and Dirk Strumberg, Marienhospital Herne/University of Bochum, Herne; Ansgar Santel, Christiane Vank, Frank Gebhardt, Oliver Keil, Christian Lange, Klaus Giese, Jörg Kaufmann, and Michael Khan, Silence Therapeutics, Berlin; and Joachim Drevs, UniFontis Clinic, Tübingen, Germany
| | - Klaus Giese
- Beate Schultheis and Dirk Strumberg, Marienhospital Herne/University of Bochum, Herne; Ansgar Santel, Christiane Vank, Frank Gebhardt, Oliver Keil, Christian Lange, Klaus Giese, Jörg Kaufmann, and Michael Khan, Silence Therapeutics, Berlin; and Joachim Drevs, UniFontis Clinic, Tübingen, Germany
| | - Jörg Kaufmann
- Beate Schultheis and Dirk Strumberg, Marienhospital Herne/University of Bochum, Herne; Ansgar Santel, Christiane Vank, Frank Gebhardt, Oliver Keil, Christian Lange, Klaus Giese, Jörg Kaufmann, and Michael Khan, Silence Therapeutics, Berlin; and Joachim Drevs, UniFontis Clinic, Tübingen, Germany
| | - Michael Khan
- Beate Schultheis and Dirk Strumberg, Marienhospital Herne/University of Bochum, Herne; Ansgar Santel, Christiane Vank, Frank Gebhardt, Oliver Keil, Christian Lange, Klaus Giese, Jörg Kaufmann, and Michael Khan, Silence Therapeutics, Berlin; and Joachim Drevs, UniFontis Clinic, Tübingen, Germany
| | - Joachim Drevs
- Beate Schultheis and Dirk Strumberg, Marienhospital Herne/University of Bochum, Herne; Ansgar Santel, Christiane Vank, Frank Gebhardt, Oliver Keil, Christian Lange, Klaus Giese, Jörg Kaufmann, and Michael Khan, Silence Therapeutics, Berlin; and Joachim Drevs, UniFontis Clinic, Tübingen, Germany
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