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Ducret A, James I, Wilson S, Feilke M, Tebbe A, Dybowski N, Elschenbroich S, Klammer M, Blackler A, Liao WL, Tian Y, Friess T, Bossenmaier B, Dietmann G, Schaab C, Hembrough T, Ceppi M. Translation and evaluation of a pre-clinical 5-protein response prediction signature in a breast cancer phase Ib clinical trial. PLoS One 2019; 14:e0213892. [PMID: 30897176 PMCID: PMC6428264 DOI: 10.1371/journal.pone.0213892] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 03/05/2019] [Indexed: 12/21/2022] Open
Abstract
Human protein biomarker discovery relies heavily on pre-clinical models, in particular established cell lines and patient-derived xenografts, but confirmation studies in primary tissue are essential to demonstrate clinical relevance. We describe in this study the process that was followed to clinically translate a 5-protein response signature predictive for the activity of an anti-HER3 monoclonal antibody (lumretuzumab) originally measured in fresh frozen xenograft tissue. We detail the development, qualification, and validation of the multiplexed targeted mass spectrometry assay used to assess the signature performance in formalin-fixed, paraffin-embedded human clinical samples collected in a phase Ib trial designed to evaluate lumretuzumab in patients with metastatic breast cancer. We believe that the strategy delineated here provides a path forward to avoid the time- and cost-consuming step of having to develop immunological reagents against unproven targets. We expect that mass spectrometry-based platforms may become part of a rational process to rapidly test and qualify large number of candidate biomarkers to identify the few that stand a chance for further development and validation.
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Affiliation(s)
- Axel Ducret
- Roche Pharmaceutical Research and Early Development, Roche Innovation Center Basel, Basel, Switzerland
- * E-mail:
| | - Ian James
- A4P Consulting Ltd, Sandwich, United Kingdom
| | - Sabine Wilson
- Roche Pharmaceutical Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | - Martina Feilke
- Roche Pharmaceutical Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | | | | | | | | | - Adele Blackler
- Oncoplex Diagnostics, Rockville, MD, United States of America
| | - Wei-Li Liao
- Oncoplex Diagnostics, Rockville, MD, United States of America
| | - Yuan Tian
- Oncoplex Diagnostics, Rockville, MD, United States of America
| | - Thomas Friess
- Roche Pharmaceutical Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | - Birgit Bossenmaier
- Roche Pharmaceutical Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | - Gabriele Dietmann
- Roche Pharmaceutical Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | | | - Todd Hembrough
- Oncoplex Diagnostics, Rockville, MD, United States of America
| | - Maurizio Ceppi
- Roche Pharmaceutical Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany
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Roolf C, Dybowski N, Sekora A, Mueller S, Knuebel G, Tebbe A, Murua Escobar H, Godl K, Junghanss C, Schaab C. Phosphoproteome Analysis Reveals Differential Mode of Action of Sorafenib in Wildtype and Mutated FLT3 Acute Myeloid Leukemia (AML) Cells. Mol Cell Proteomics 2017; 16:1365-1376. [PMID: 28450419 PMCID: PMC5500767 DOI: 10.1074/mcp.m117.067462] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 03/30/2017] [Indexed: 01/07/2023] Open
Abstract
Constitutively activating internal tandem duplication (ITD) alterations of the receptor tyrosine kinase FLT3 (Fms-like tyrosine kinase 3) are common in acute myeloid leukemia (AML) and classifies FLT3 as an attractive therapeutic target. So far, applications of FLT3 small molecule inhibitors have been investigated primarily in FLT3-ITD+ patients. Only recently, a prolonged event-free survival has been observed in AML patients who were treated with the multikinase inhibitor sorafenib in addition to standard therapy. Here, we studied the sorafenib effect on proliferation in a panel of 13 FLT3-ITD− and FLT3-ITD+ AML cell lines. Sorafenib IC50 values ranged from 0.001 to 5.6 μm, whereas FLT3-ITD+ cells (MOLM-13, MV4-11) were found to be more sensitive to sorafenib than FLT3-ITD− cells. However, we identified two FLT3-ITD− cell lines (MONO-MAC-1 and OCI-AML-2) which were also sorafenib sensitive. Phosphoproteome analyses revealed that the affected pathways differed in sorafenib sensitive FLT3-ITD− and FLT3-ITD+ cells. In MV4-11 cells sorafenib suppressed mTOR signaling by direct inhibition of FLT3. In MONO-MAC-1 cells sorafenib inhibited the MEK/ERK pathway. These data suggest that the FLT3 status in AML patients might not be the only factor predicting response to treatment with sorafenib.
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Affiliation(s)
- Catrin Roolf
- From the ‡Department of Medicine, Clinic III-Hematology/Oncology/Palliative Care, Rostock University Medical Center, University of Rostock, 18057 Rostock, Germany
| | | | - Anett Sekora
- From the ‡Department of Medicine, Clinic III-Hematology/Oncology/Palliative Care, Rostock University Medical Center, University of Rostock, 18057 Rostock, Germany
| | - Stefan Mueller
- From the ‡Department of Medicine, Clinic III-Hematology/Oncology/Palliative Care, Rostock University Medical Center, University of Rostock, 18057 Rostock, Germany
| | - Gudrun Knuebel
- From the ‡Department of Medicine, Clinic III-Hematology/Oncology/Palliative Care, Rostock University Medical Center, University of Rostock, 18057 Rostock, Germany
| | | | - Hugo Murua Escobar
- From the ‡Department of Medicine, Clinic III-Hematology/Oncology/Palliative Care, Rostock University Medical Center, University of Rostock, 18057 Rostock, Germany
| | - Klaus Godl
- §Evotec (München) GmbH, 82152 Martinsried, Germany
| | - Christian Junghanss
- From the ‡Department of Medicine, Clinic III-Hematology/Oncology/Palliative Care, Rostock University Medical Center, University of Rostock, 18057 Rostock, Germany
| | - Christoph Schaab
- §Evotec (München) GmbH, 82152 Martinsried, Germany; .,¶Department of Proteomics and Signal Transduction, Max-Planck Institute for Biochemistry, 82152 Martinsried, Germany
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Dybowski N, Heider D, Hoffmann D. Structure of HIV-1 quasi-species as early indicator for switches of co-receptor tropism. AIDS Res Ther 2010; 7:41. [PMID: 21118549 PMCID: PMC3009693 DOI: 10.1186/1742-6405-7-41] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Accepted: 11/30/2010] [Indexed: 01/12/2023] Open
Abstract
Deep sequencing is able to generate a complete picture of the retroviral quasi-species in a patient. We demonstrate that the unprecedented power of deep sequencing in conjunction with computational data analysis has great potential for clinical diagnostics and basic research. Specifically, we analyzed longitudinal deep sequencing data from patients in a study with Vicriviroc, a drug that blocks the HIV-1 co-receptor CCR5. Sequences covered the V3-loop of gp120, known to be the main determinant of co-receptor tropism. First, we evaluated this data with a computational model for the interpretation of V3-sequences with respect to tropism, and we found complete agreement with results from phenotypic assays. Thus, the method could be applied in cases where phenotypic assays fail. Second, computational analysis led to the discovery of a characteristic pattern in the quasi-species that foreshadows switches of co-receptor tropism. This analysis could help to unravel the mechanism of tropism switches, and to predict these switches weeks to months before they can be detected by a phenotypic assay.
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