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James RL, Sisserson T, Cai Z, Dumas ME, Inge LJ, Ranger-Moore J, Mason A, Sloss CM, McArthur K. Development of an FRα Companion Diagnostic Immunohistochemical Assay for Mirvetuximab Soravtansine. Arch Pathol Lab Med 2024:498667. [PMID: 38282564 DOI: 10.5858/arpa.2023-0149-oa] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/17/2023] [Indexed: 01/30/2024]
Abstract
CONTEXT.— Folate receptor-α (FRα, encoded by the FOLR1 gene) is overexpressed in several solid tumor types, including epithelial ovarian cancer (EOC), making it an attractive biomarker and target for FRα-based therapy in ovarian cancer. OBJECTIVE.— To describe the development, analytic verification, and clinical performance of the VENTANA FOLR1 Assay (Ventana Medical Systems Inc) in EOC. DESIGN.— We used industry standard studies to establish the analytic verification of the VENTANA FOLR1 Assay. Furthermore, the VENTANA FOLR1 Assay was used in the ImmunoGen Inc-sponsored SORAYA study to select patients for treatment with mirvetuximab soravtansine (MIRV) in platinum-resistant EOC. RESULTS.— The VENTANA FOLR1 Assay is highly reproducible, demonstrated by a greater than 98% overall percent agreement (OPA) for repeatability and intermediate precision studies, greater than 93% OPA for interreader and greater than 96% for intrareader studies, and greater than 90% OPA across all observations in the interlaboratory reproducibility study. The performance of the VENTANA FOLR1 Assay in the SORAYA study was evaluated by the overall staining acceptability rate, which was calculated using the number of patient specimens that were tested with the VENTANA FOLR1 Assay that had an evaluable result. In the SORAYA trial, data in patients who received MIRV demonstrated clinically meaningful efficacy, and the overall staining acceptability rate of the assay was 98.4%, demonstrating that the VENTANA FOLR1 Assay is safe and effective for selecting patients who may benefit from MIRV. Together, these data showed that the assay is highly reliable, consistently producing evaluable results in the clinical setting. CONCLUSIONS.— The VENTANA FOLR1 Assay is a robust and reproducible assay for detecting FRα expression and identifying a patient population that derived clinically meaningful benefit from MIRV in the SORAYA study.
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Affiliation(s)
- Racheal L James
- From the Department of Assay Development, Personalized Healthcare Solutions, Roche Tissue Diagnostics, Tucson, Arizona (James, Sisserson)
| | - Taryn Sisserson
- From the Department of Assay Development, Personalized Healthcare Solutions, Roche Tissue Diagnostics, Tucson, Arizona (James, Sisserson)
| | - Zhuangyu Cai
- From the Department of Clinical Development & Medical Affairs, Personalized Healthcare Solutions, Roche Tissue Diagnostics, Tucson, Arizona (Cai, Dumas, Inge, Ranger-Moore, Mason)
| | - Megan E Dumas
- From the Department of Clinical Development & Medical Affairs, Personalized Healthcare Solutions, Roche Tissue Diagnostics, Tucson, Arizona (Cai, Dumas, Inge, Ranger-Moore, Mason)
| | - Landon J Inge
- From the Department of Clinical Development & Medical Affairs, Personalized Healthcare Solutions, Roche Tissue Diagnostics, Tucson, Arizona (Cai, Dumas, Inge, Ranger-Moore, Mason)
| | - James Ranger-Moore
- From the Department of Clinical Development & Medical Affairs, Personalized Healthcare Solutions, Roche Tissue Diagnostics, Tucson, Arizona (Cai, Dumas, Inge, Ranger-Moore, Mason)
| | - Albert Mason
- From the Department of Clinical Development & Medical Affairs, Personalized Healthcare Solutions, Roche Tissue Diagnostics, Tucson, Arizona (Cai, Dumas, Inge, Ranger-Moore, Mason)
| | - Callum M Sloss
- the Department of Translational Sciences, ImmunoGen Inc, Waltham, Massachusetts (Sloss)
| | - Katherine McArthur
- From the Department of Oncology, Personalized Healthcare Solutions, Roche Tissue Diagnostics, Tucson, Arizona (McArthur)
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Malaby HLH, Dumas ME, Ohi R, Stumpff J. Kinesin-binding protein ensures accurate chromosome segregation by buffering KIF18A and KIF15. J Cell Biol 2019; 218:1218-1234. [PMID: 30709852 PMCID: PMC6446846 DOI: 10.1083/jcb.201806195] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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] [Received: 06/27/2018] [Revised: 11/09/2018] [Accepted: 01/08/2019] [Indexed: 12/22/2022] Open
Abstract
Kinesin-binding protein (KBP) is identified as a regulator of the kinesins KIF18A and KIF15 during mitosis. KBP buffers the activity of these motors to control chromosome alignment and spindle integrity in metaphase and prevent lagging chromosomes in anaphase. Mitotic kinesins must be regulated to ensure a precise balance of spindle forces and accurate segregation of chromosomes into daughter cells. Here, we demonstrate that kinesin-binding protein (KBP) reduces the activity of KIF18A and KIF15 during metaphase. Overexpression of KBP disrupts the movement and alignment of mitotic chromosomes and decreases spindle length, a combination of phenotypes observed in cells deficient for KIF18A and KIF15, respectively. We show through gliding filament and microtubule co-pelleting assays that KBP directly inhibits KIF18A and KIF15 motor activity by preventing microtubule binding. Consistent with these effects, the mitotic localizations of KIF18A and KIF15 are altered by overexpression of KBP. Cells depleted of KBP exhibit lagging chromosomes in anaphase, an effect that is recapitulated by KIF15 and KIF18A overexpression. Based on these data, we propose a model in which KBP acts as a protein buffer in mitosis, protecting cells from excessive KIF18A and KIF15 activity to promote accurate chromosome segregation.
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Affiliation(s)
- Heidi L H Malaby
- Department of Molecular Physiology and Biophysics, University of Vermont, Burlington, VT
| | - Megan E Dumas
- Department of Cell and Developmental Biology, Vanderbilt University Medical School, Nashville, TN
| | - Ryoma Ohi
- The Life Sciences Institute, University of Michigan Medical School, Ann Arbor, MI .,Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI
| | - Jason Stumpff
- Department of Molecular Physiology and Biophysics, University of Vermont, Burlington, VT
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Dumas ME, Chen GY, Kendrick ND, Xu G, Larsen SD, Jana S, Waterson AG, Bauer JA, Hancock W, Sulikowski GA, Ohi R. Dual inhibition of Kif15 by oxindole and quinazolinedione chemical probes. Bioorg Med Chem Lett 2018; 29:148-154. [PMID: 30528696 DOI: 10.1016/j.bmcl.2018.12.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 11/30/2018] [Accepted: 12/04/2018] [Indexed: 11/29/2022]
Abstract
The mitotic spindle is a microtubule-based machine that segregates a replicated set of chromosomes during cell division. Many cancer drugs alter or disrupt the microtubules that form the mitotic spindle. Microtubule-dependent molecular motors that function during mitosis are logical alternative mitotic targets for drug development. Eg5 (Kinesin-5) and Kif15 (Kinesin-12), in particular, are an attractive pair of motor proteins, as they work in concert to drive centrosome separation and promote spindle bipolarity. Furthermore, we hypothesize that the clinical failure of Eg5 inhibitors may be (in part) due to compensation by Kif15. In order to test this idea, we screened a small library of kinase inhibitors and identified GW108X, an oxindole that inhibits Kif15 in vitro. We show that GW108X has a distinct mechanism of action compared with a commercially available Kif15 inhibitor, Kif15-IN-1 and may serve as a lead with which to further develop Kif15 inhibitors as clinically relevant agents.
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Affiliation(s)
- Megan E Dumas
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, United States
| | - Geng-Yuan Chen
- Department of Biomedical Engineering, Pennsylvania State University, State College, PA, United States
| | - Nicole D Kendrick
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, United States
| | - George Xu
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, United States
| | - Scott D Larsen
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, MI 48109, United States
| | - Somnath Jana
- Vanderbilt Institute of Chemical Biology, Nashville, TN 37232, United States
| | - Alex G Waterson
- Vanderbilt Institute of Chemical Biology, Nashville, TN 37232, United States; Department of Chemistry, Vanderbilt University, Nashville, TN 37232, United States; Department of Pharmacology, Vanderbilt University, Nashville, TN 37232, United States
| | - Joshua A Bauer
- Department of Biochemistry, Vanderbilt University, Nashville, TN 37232, United States
| | - William Hancock
- Department of Biomedical Engineering, Pennsylvania State University, State College, PA, United States
| | - Gary A Sulikowski
- Department of Chemistry, Vanderbilt University, Nashville, TN 37232, United States
| | - Ryoma Ohi
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, United States; Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, United States.
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Li B, Siuta M, Bright V, Koktysh D, Matlock BK, Dumas ME, Zhu M, Holt A, Stec D, Deng S, Savage PB, Joyce S, Pham W. Improved proliferation of antigen-specific cytolytic T lymphocytes using a multimodal nanovaccine. Int J Nanomedicine 2016; 11:6103-6121. [PMID: 27895483 PMCID: PMC5117944 DOI: 10.2147/ijn.s112432] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The present study investigated the immunoenhancing property of our newly designed nanovaccine, that is, its ability to induce antigen-specific immunity. This study also evaluated the synergistic effect of a novel compound PBS-44, an α-galactosylceramide analog, in boosting the immune response induced by our nanovaccine. The nanovaccine was prepared by encapsulating ovalbumin (ova) and an adjuvant within the poly(lactic-co-glycolic acid) nanoparticles. Quantitative analysis of our study data showed that the encapsulated vaccine was physically and biologically stable; the core content of our nanovaccine was found to be released steadily and slowly, and nearly 90% of the core content was slowly released over the course of 25 days. The in vivo immunization studies exhibited that the nanovaccine induced stronger and longer immune responses compared to its soluble counterpart. Similarly, intranasal inhalation of the nanovaccine induced more robust antigen-specific CD8+ T cell response than intraperitoneal injection of nanovaccine.
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Affiliation(s)
- Bo Li
- Institute of Imaging Science, Vanderbilt University School of Medicine; Department of Radiology and Radiological Sciences
| | - Michael Siuta
- Institute of Imaging Science, Vanderbilt University School of Medicine
| | - Vanessa Bright
- Institute of Imaging Science, Vanderbilt University School of Medicine; Department of Radiology and Radiological Sciences
| | - Dmitry Koktysh
- Department of Chemistry, Vanderbilt University; Vanderbilt Institute of Nanoscale Science and Engineering
| | | | - Megan E Dumas
- Institute of Imaging Science, Vanderbilt University School of Medicine
| | - Meiying Zhu
- Institute of Imaging Science, Vanderbilt University School of Medicine
| | - Alex Holt
- Institute of Imaging Science, Vanderbilt University School of Medicine
| | - Donald Stec
- Department of Chemistry, Vanderbilt University; Vanderbilt Institute of Chemical Biology
| | - Shenglou Deng
- Department of Chemistry and Biochemistry, Brigham Young University
| | - Paul B Savage
- Department of Chemistry and Biochemistry, Brigham Young University
| | - Sebastian Joyce
- Department of Pathology, Microbiology and Immunology, Vanderbilt University; Veterans Administration Tennessee Valley Healthcare System
| | - Wellington Pham
- Institute of Imaging Science, Vanderbilt University School of Medicine; Department of Radiology and Radiological Sciences; Vanderbilt Institute of Chemical Biology; Department of Biomedical Engineering; Vanderbilt Ingram Cancer Center; Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN, USA
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Affiliation(s)
- Megan E Dumas
- a Department of Cell and Developmental Biology , Vanderbilt University Medical School , Nashville , TN , USA
| | - Emma G Sturgill
- a Department of Cell and Developmental Biology , Vanderbilt University Medical School , Nashville , TN , USA
| | - Ryoma Ohi
- a Department of Cell and Developmental Biology , Vanderbilt University Medical School , Nashville , TN , USA
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Toye AA, Dumas ME, Blancher C, Rothwell AR, Fearnside JF, Wilder SP, Bihoreau MT, Cloarec O, Azzouzi I, Young S, Barton RH, Holmes E, McCarthy MI, Tatoud R, Nicholson JK, Scott J, Gauguier D. Subtle metabolic and liver gene transcriptional changes underlie diet-induced fatty liver susceptibility in insulin-resistant mice. Diabetologia 2007; 50:1867-1879. [PMID: 17618414 DOI: 10.1007/s00125-007-0738-5] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2007] [Accepted: 05/24/2007] [Indexed: 12/14/2022]
Abstract
AIMS/HYPOTHESIS Complex changes in gene expression are associated with insulin resistance and non-alcoholic fatty liver disease (NAFLD) promoted by feeding a high-fat diet (HFD). We used functional genomic technologies to document molecular mechanisms associated with diet-induced NAFLD. MATERIALS AND METHODS Male 129S6 mice were fed a diet containing 40% fat (high-fat diet, HFD) for 15 weeks. Glucose tolerance, in vivo insulin secretion, plasma lipid profile and adiposity were determined. Plasma metabonomics and liver transcriptomics were used to identify changes in gene expression associated with HFD-induced NAFLD. RESULTS In HFD-fed mice, NAFLD and impaired glucose and lipid homeostasis were associated with increased hepatic transcription of genes involved in fatty acid uptake, intracellular transport, modification and elongation, whilst genes involved in beta-oxidation and lipoprotein secretion were, paradoxically, also upregulated. NAFLD developed despite strong and sustained downregulation of transcription of the gene encoding stearoyl-coenzyme A desaturase 1 (Scd1) and uncoordinated regulation of transcription of Scd1 and the gene encoding sterol regulatory element binding factor 1c (Srebf1c) transcription. Inflammatory mechanisms appeared to be stimulated by HFD. CONCLUSIONS/INTERPRETATION Our results provide an accurate representation of subtle changes in metabolic and gene expression regulation underlying disease-promoting and compensatory mechanisms, collectively contributing to diet-induced insulin resistance and NAFLD. They suggest that proposed models of NAFLD pathogenesis can be enriched with novel diet-reactive genes and disease mechanisms.
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Affiliation(s)
- A A Toye
- The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, OX3 7BN, UK
| | - M E Dumas
- Department of Biomolecular Medicine, Division of Surgery, Oncology, Reproductive Biology and Anaesthetics, Faculty of Medicine, Imperial College London, London, UK
| | - C Blancher
- The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, OX3 7BN, UK
| | - A R Rothwell
- The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, OX3 7BN, UK
| | - J F Fearnside
- The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, OX3 7BN, UK
| | - S P Wilder
- The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, OX3 7BN, UK
| | - M T Bihoreau
- The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, OX3 7BN, UK
| | - O Cloarec
- Department of Biomolecular Medicine, Division of Surgery, Oncology, Reproductive Biology and Anaesthetics, Faculty of Medicine, Imperial College London, London, UK
| | - I Azzouzi
- The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, OX3 7BN, UK
| | - S Young
- The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, OX3 7BN, UK
| | - R H Barton
- Department of Biomolecular Medicine, Division of Surgery, Oncology, Reproductive Biology and Anaesthetics, Faculty of Medicine, Imperial College London, London, UK
| | - E Holmes
- Department of Biomolecular Medicine, Division of Surgery, Oncology, Reproductive Biology and Anaesthetics, Faculty of Medicine, Imperial College London, London, UK
| | - M I McCarthy
- The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, OX3 7BN, UK
| | - R Tatoud
- Faculty of Medicine, Imperial College London, London, UK
| | - J K Nicholson
- Department of Biomolecular Medicine, Division of Surgery, Oncology, Reproductive Biology and Anaesthetics, Faculty of Medicine, Imperial College London, London, UK
| | - J Scott
- Faculty of Medicine, Imperial College London, London, UK
| | - D Gauguier
- The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, OX3 7BN, UK.
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