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Mestnik S, Wilson S, Huang A, Sato M. Prolonged remission achieved with maintenance intraventricular chemotherapy in young patient with recurrent atypical teratoid rhabdoid tumor. Pediatr Blood Cancer 2023; 70:e30225. [PMID: 36789544 DOI: 10.1002/pbc.30225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 01/02/2023] [Indexed: 02/16/2023]
Affiliation(s)
- Shelby Mestnik
- Department of Hematology/Oncology, M Health Fairview Masonic Children's Hospital, Minneapolis, Minnesota, USA
| | - Saul Wilson
- Department of Neurosurgery, University of Indiana, Indianapolis, Indiana, USA
| | - Annie Huang
- Department of Hematology/Oncology, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Mariko Sato
- Department of Oncology, Children's Hospital of Orange County, Orange, California, USA
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Chatwin H, Lemma R, DeSisto J, Knox A, Mestnik S, Reid A, Vibhakar R, Venkataraman S, Green A. DIPG-79. H3K27M INDUCES EPIGENETIC AND ONCOGENIC CHANGES THAT ARE PARTIALLY REVERSED BY SMALL MOLECULE AURORA KINASE B/C INHIBITION. Neuro Oncol 2020. [PMCID: PMC7715821 DOI: 10.1093/neuonc/noaa222.121] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Diffuse intrinsic pontine glioma (DIPG) is a fatal pediatric brain tumor with no curative treatments. Approximately 80% of DIPGs contain an H3K27M mutation. The implications of the mutation and how they may be targeted are not fully understood. We established an H3K27M effect-isolating model by transducing H3K27-wildtype lines (HSJD-GBM-001, normal human astrocytes) with lentiviral-packaged H3K27M. We characterized H3K27M-related changes through western blot, phenotypic assays, and RNA-seq. Drug screening of H3K27-wildtype and matched H3K27M-transduced lines was used to identify targets more effective with H3K27M present. Patient-derived pediatric glioblastoma and DIPG lines (BT-245, SU-DIPG-IV, HSJD-DIPG-007, SU-DIPG-XIII*, SF7761) were used for validation. We observed increased H3K27ac and decreased H3K27me3, as well as increased proliferative and migratory abilities, with the addition of H3K27M to H3K27-wildtype lines. RNA-seq showed downregulation of cell cycle regulation and upregulation of epithelial-mesenchymal transition. GSK1070916, an Aurora kinase B/C inhibitor, was isolated from a synthetic lethality screen with H3K27M. GSK1070916 showed strong efficacy in native H3K27M lines (IC50s=60nM-1250nM), superior to the Aurora kinase A inhibitor alisertib, to which all cell lines showed substantial resistance. Combination of both drugs was not synergistic. GSK1070916 treatment caused increased H3K27me3 and decreased H3S10ph and H3S28ph. GSK1070916 induced apoptosis and S-phase stall. The H3K27M mutation induces epigenetic, phenotypic, and cell cycle regulation changes resulting in relaxation of transcriptional controls and more aggressive growth. Aurora kinase B/C inhibition is a novel therapeutic modality for DIPG that appears capable of reversing some H3K27M-related epigenetic changes, inducing apoptosis, and repressing uncontrolled cellular division.
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Affiliation(s)
- Hannah Chatwin
- The Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine/Children’s Hospital Colorado, Aurora, CO, USA
| | - Rakeb Lemma
- The Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine/Children’s Hospital Colorado, Aurora, CO, USA
| | - John DeSisto
- The Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine/Children’s Hospital Colorado, Aurora, CO, USA
| | - Aaron Knox
- The Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine/Children’s Hospital Colorado, Aurora, CO, USA
| | - Shelby Mestnik
- The Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine/Children’s Hospital Colorado, Aurora, CO, USA
| | - Aidan Reid
- The Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine/Children’s Hospital Colorado, Aurora, CO, USA
| | - Rajeev Vibhakar
- The Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine/Children’s Hospital Colorado, Aurora, CO, USA
| | - Sujatha Venkataraman
- The Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine/Children’s Hospital Colorado, Aurora, CO, USA
| | - Adam Green
- The Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine/Children’s Hospital Colorado, Aurora, CO, USA
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DeSisto JA, Flannery P, Lemma R, Pathak A, Mestnik S, Philips N, Bales NJ, Kashyap T, Moroze E, Venkataraman S, Kung AL, Carter BD, Landesman Y, Vibhakar R, Green AL. Exportin 1 Inhibition Induces Nerve Growth Factor Receptor Expression to Inhibit the NF-κB Pathway in Preclinical Models of Pediatric High-Grade Glioma. Mol Cancer Ther 2020; 19:540-551. [PMID: 31594826 PMCID: PMC7007851 DOI: 10.1158/1535-7163.mct-18-1319] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 08/23/2019] [Accepted: 10/01/2019] [Indexed: 12/27/2022]
Abstract
High-grade glioma (HGG) is the leading cause of cancer-related death among children. Selinexor, an orally bioavailable, reversible inhibitor of the nuclear export protein, exportin 1, is in clinical trials for a range of cancers, including HGG. It inhibits the NF-κB pathway and strongly induces the expression of nerve growth factor receptor (NGFR) in preclinical cancer models. We hypothesized that selinexor inhibits NF-κB via upregulation of NGFR. In HGG cells, sensitivity to selinexor correlated with increased induction of cell surface NGFR expression. Knocking down NGFR in HGG cells increased proliferation, anchorage-independent growth, stemness markers, and levels of transcriptionally available nuclear NF-κB not bound to IκB-α, while decreasing apoptosis and sensitivity to selinexor. Increasing IκB-α levels in NGFR knockdown cells restored sensitivity to selinexor. Overexpression of NGFR using cDNA reduced levels of free nuclear NF-κB, decreased stemness markers, and increased markers of cellular differentiation. In all HGG lines tested, selinexor decreased phosphorylation of NF-κB at serine 536 (a site associated with increased transcription of proliferative and inflammatory genes). Because resistance to selinexor monotherapy occurred in our in vivo model, we screened selinexor with a panel of FDA-approved anticancer agents. Bortezomib, a proteasome inhibitor that inhibits the NF-κB pathway through a different mechanism than selinexor, showed synergy with selinexor against HGG in vitro Our results help elucidate selinexor's mechanism of action and identify NGFR as a potential biomarker of its effect in HGG and in addition suggest a combination therapy strategy for these challenging tumors.
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Affiliation(s)
- John A DeSisto
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Patrick Flannery
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Rakeb Lemma
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Amrita Pathak
- Department of Biochemistry, Vanderbilt University Medical School, Nashville, Tennessee
| | - Shelby Mestnik
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Natalie Philips
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Natalie J Bales
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine, Aurora, Colorado
| | | | - Erin Moroze
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Sujatha Venkataraman
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine, Aurora, Colorado
| | - Andrew L Kung
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Bruce D Carter
- Department of Biochemistry, Vanderbilt University Medical School, Nashville, Tennessee
| | | | - Rajeev Vibhakar
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine, Aurora, Colorado
- Children's Hospital Colorado, Aurora, Colorado
| | - Adam L Green
- Morgan Adams Foundation Pediatric Brain Tumor Research Program, University of Colorado School of Medicine, Aurora, Colorado.
- Children's Hospital Colorado, Aurora, Colorado
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DeSisto J, Flannery P, Kashyap T, Lemma R, Mestnik S, Kung A, Vibhakar R, Landesman Y, Green A. Abstract 1946: Synergistic effects of the XPO1 inhibitor selinexor with proteasome inhibitors in pediatric high-grade glioma and diffuse intrinsic pontine glioma. Tumour Biol 2017. [DOI: 10.1158/1538-7445.am2017-1946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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