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Palande V, Siegal T, Detroja R, Gorohovski A, Glass R, Flueh C, Kanner AA, Laviv Y, Har-Nof S, Levy-Barda A, Viviana Karpuj M, Kurtz M, Perez S, Raviv Shay D, Frenkel-Morgenstern M. Detection of gene mutations and gene-gene fusions in circulating cell-free DNA of glioblastoma patients: an avenue for clinically relevant diagnostic analysis. Mol Oncol 2021; 16:2098-2114. [PMID: 34875133 PMCID: PMC9120899 DOI: 10.1002/1878-0261.13157] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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] [Received: 12/24/2020] [Revised: 09/04/2021] [Accepted: 12/06/2021] [Indexed: 11/20/2022] Open
Abstract
Glioblastoma (GBM) is the most common type of glioma and is uniformly fatal. Currently, tumour heterogeneity and mutation acquisition are major impedances for tailoring personalized therapy. We collected blood and tumour tissue samples from 25 GBM patients and 25 blood samples from healthy controls. Cell‐free DNA (cfDNA) was extracted from the plasma of GBM patients and from healthy controls. Tumour DNA was extracted from fresh tumour samples. Extracted DNA was sequenced using a whole‐genome sequencing procedure. We also collected 180 tumour DNA datasets from GBM patients publicly available at the TCGA/PANCANCER project. These data were analysed for mutations and gene–gene fusions that could be potential druggable targets. We found that plasma cfDNA concentrations in GBM patients were significantly elevated (22.6 ± 5 ng·mL−1), as compared to healthy controls (1.4 ± 0.4 ng·mL−1) of the same average age. We identified unique mutations in the cfDNA and tumour DNA of each GBM patient, including some of the most frequently mutated genes in GBM according to the COSMIC database (TP53, 18.75%; EGFR, 37.5%; NF1, 12.5%; LRP1B, 25%; IRS4, 25%). Using our gene–gene fusion database, ChiTaRS 5.0, we identified gene–gene fusions in cfDNA and tumour DNA, such as KDR–PDGFRA and NCDN–PDGFRA, which correspond to previously reported alterations of PDGFRA in GBM (44% of all samples). Interestingly, the PDGFRA protein fusions can be targeted by tyrosine kinase inhibitors such as imatinib, sunitinib, and sorafenib. Moreover, we identified BCR–ABL1 (in 8% of patients), COL1A1–PDGFB (8%), NIN–PDGFRB (8%), and FGFR1–BCR (4%) in cfDNA of patients, which can be targeted by analogues of imatinib. ROS1 fusions (CEP85L–ROS1 and GOPC–ROS1), identified in 8% of patient cfDNA, might be targeted by crizotinib, entrectinib, or larotrectinib. Thus, our study suggests that integrated analysis of cfDNA plasma concentration, gene mutations, and gene–gene fusions can serve as a diagnostic modality for distinguishing GBM patients who may benefit from targeted therapy. These results open new avenues for precision medicine in GBM, using noninvasive liquid biopsy diagnostics to assess personalized patient profiles. Moreover, repeated detection of druggable targets over the course of the disease may provide real‐time information on the evolving molecular landscape of the tumour.
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Affiliation(s)
- Vikrant Palande
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed, 1311502, Israel
| | - Tali Siegal
- Neuro-Oncology Center, Rabin Medical Center, Petach Tikva, Israel and Hebrew University, 4941492, Jerusalem, Israel
| | - Rajesh Detroja
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed, 1311502, Israel
| | | | - Rainer Glass
- Department of Neurosurgery, Ludwig-Maximilians-University, 81377, Munich, Germany
| | - Charlotte Flueh
- Department of Neurosurgery, University Hospital of Schleswig-Holstein, Campus Kiel, 24105, Kiel, Germany
| | - Andrew A Kanner
- Department of Neurosurgery, Rabin Medical Center, Petach Tikva, 4941492, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yoseph Laviv
- Department of Neurosurgery, Rabin Medical Center, Petach Tikva, 4941492, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Sagi Har-Nof
- Department of Neurosurgery, Rabin Medical Center, Petach Tikva, 4941492, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Adva Levy-Barda
- Department of Pathology, Rabin Medical Center, Petach Tikva, 4941492, Israel
| | | | - Marina Kurtz
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed, 1311502, Israel
| | - Shira Perez
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed, 1311502, Israel
| | - Dorith Raviv Shay
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed, 1311502, Israel
| | - Milana Frenkel-Morgenstern
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed, 1311502, Israel.,The Dangoor Centre For Personalized Medicine, Bar-Ilan University, Ramat Gan, 5290002, Israel
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Ben-Gedalya T, Lyakhovetsky R, Yedidia Y, Bejerano-Sagie M, Kogan NM, Karpuj MV, Kaganovich D, Cohen E. Cyclosporin-A-induced prion protein aggresomes are dynamic quality-control cellular compartments. J Cell Sci 2011; 124:1891-902. [PMID: 21558416 DOI: 10.1242/jcs.077693] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Despite the activity of cellular quality-control mechanisms, subsets of mature and newly synthesized polypeptides fail to fold properly and form insoluble aggregates. In some cases, protein aggregation leads to the development of human neurodegenerative maladies, including Alzheimer's and prion diseases. Aggregates of misfolded prion protein (PrP), which appear in cells after exposure to the drug cyclosporin A (CsA), and disease-linked PrP mutants have been found to accumulate in juxtanuclear deposition sites termed 'aggresomes'. Recently, it was shown that cells can contain at least two types of deposition sites for misfolded proteins: a dynamic quality-control compartment, which was termed 'JUNQ', and a site for terminally aggregated proteins called 'IPOD'. Here, we show that CsA-induced PrP aggresomes are dynamic structures that form despite intact proteasome activity, recruit chaperones and dynamically exchange PrP molecules with the cytosol. These findings define the CsA-PrP aggresome as a JUNQ-like dynamic quality-control compartment that mediates the refolding or degradation of misfolded proteins. Together, our data suggest that the formation of PrP aggresomes protects cells from proteotoxic stress.
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Affiliation(s)
- Tziona Ben-Gedalya
- Biochemistry and Molecular Biology, Institute for Medical Research Israel-Canada (IMRIC), Hebrew University Medical School, Jerusalem 91120, Israel
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Karpuj MV, Gelibter-Niv S, Tiran A, Rambold A, Tatzelt J, Nunziante M, Schatzl HM. Conditional modulation of membrane protein expression in cultured cells mediated by prion protein recognition of short phosphorothioate oligodeoxynucleotides. J Biol Chem 2010; 286:6911-7. [PMID: 21156803 DOI: 10.1074/jbc.m110.194662] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
We demonstrate that the levels of native as well as transfected prion protein (PrP) are lowered in various cell lines exposed to phosphorothioate oligodeoxynucleotides (PS-DNA) and can be rapidly reverted to their normal amounts by removal of PS-DNA. This transient modulation was independent of the glycosylation state of PrP, and in addition, all three PrP glycoforms were susceptible to PS-DNA treatment. Deletion of the N-terminal domain (amino acids 23-99), but not of the other domains of PrP, abrogated its PS-DNA-mediated down-regulation. PrP versions localized in the mitochondria, cytoplasm, or nucleus were not modulated by PS-DNA, indicating that PrP surface exposure is required for executing this effect. Proteins that in their native forms were not responsive to PS-DNA, such as thymocyte antigen 1 (Thy1), Doppel protein (Dpl), green fluorescent protein (GFP), and cyan fluorescent protein (CFP), became susceptible to PS-DNA-mediated down-regulation following introduction of the N terminus of PrP into their sequence. These observations demonstrate the essential role of the N-terminal domain for promoting oligonucleotide-mediated reduction of the PrP level and suggest that transient treatment of cultured cells with PS-DNA may provide a general method for targeted modulation of the levels of desired surface proteins in a conditional and reversible manner.
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Affiliation(s)
- Marcela Viviana Karpuj
- Institute of Biochemistry, Food Science and Nutrition Food and Environmental Quality Sciences, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel.
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Karpuj MV, Garren H, Slunt H, Price DL, Gusella J, Becher MW, Steinman L. Transglutaminase aggregates huntingtin into nonamyloidogenic polymers, and its enzymatic activity increases in Huntington's disease brain nuclei. Proc Natl Acad Sci U S A 1999; 96:7388-93. [PMID: 10377424 PMCID: PMC22095 DOI: 10.1073/pnas.96.13.7388] [Citation(s) in RCA: 179] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The protein huntingtin (htt), aggregated in neuronal nuclear inclusions, is pathognomonic of Huntington's disease (HD). Constructs, translated in vitro from the N terminus of htt, containing either polyQ23 from a normal individual, or polyQ41 or polyQ67 from an HD patient, were all soluble. Transglutaminase (TGase) crosslinked these proteins, and the aggregations did not have the staining properties of amyloid. More TGase-catalyzed aggregates formed when the polyglutamine domain of htt exceeded the pathologic threshold of polyQ36. Furthermore, shorter htt constructs, containing 135 aa or fewer, formed more aggregates than did larger htt constructs. TGase activity in the HD brain was increased compared with the control, with notable increases in cell nuclei. The increased TGase activity was brain specific. In lymphoblastoid cells from HD patients, TGase activity was decreased. TGase-mediated crosslinking of htt may be involved in the formation of the nonamyloidogenic nuclear inclusions found in the HD brain. The staining properties of nuclear inclusions in the HD brain revealed that they were not amyloid.
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Affiliation(s)
- M V Karpuj
- Weizmann Institute of Science, Rehovot 76100, Israel
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Ruiz PJ, Garren H, Hirschberg DL, Langer-Gould AM, Levite M, Karpuj MV, Southwood S, Sette A, Conlon P, Steinman L. Microbial epitopes act as altered peptide ligands to prevent experimental autoimmune encephalomyelitis. J Exp Med 1999; 189:1275-84. [PMID: 10209044 PMCID: PMC2193020 DOI: 10.1084/jem.189.8.1275] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Molecular mimicry refers to structural homologies between a self-protein and a microbial protein. A major epitope of myelin basic protein (MBP), p87-99 (VHFFKNIVTPRTP), induces experimental autoimmune encephalomyelitis (EAE). VHFFK contains the major residues for binding of this self-molecule to T cell receptor (TCR) and to the major histocompatibility complex. Peptides from papilloma virus strains containing the motif VHFFK induce EAE. A peptide from human papilloma virus type 40 (HPV 40) containing VHFFR, and one from HPV 32 containing VHFFH, prevented EAE. A sequence from Bacillus subtilis (RKVVTDFFKNIPQRI) also prevented EAE. T cell lines, producing IL-4 and specific for these microbial peptides, suppressed EAE. Thus, microbial peptides, differing from the core motif of the self-antigen, MBPp87-99, function as altered peptide ligands, and behave as TCR antagonists, in the modulation of autoimmune disease.
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Affiliation(s)
- P J Ruiz
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California 94305, USA
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Ruiz PJ, Garren H, Ruiz IU, Hirschberg DL, Nguyen LV, Karpuj MV, Cooper MT, Mitchell DJ, Fathman CG, Steinman L. Suppressive immunization with DNA encoding a self-peptide prevents autoimmune disease: modulation of T cell costimulation. J Immunol 1999; 162:3336-41. [PMID: 10092787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Usually we rely on vaccination to promote an immune response to a pathogenic microbe. In this study, we demonstrate a suppressive from of vaccination, with DNA encoding a minigene for residues 139-151 of myelin proteolipid protein (PLP139-151), a pathogenic self-Ag. This suppressive vaccination attenuates a prototypic autoimmune disease, experimental autoimmune encephalomyelitis, which presents clinically with paralysis. Proliferative responses and production of the Th1 cytokines, IL-2 and IFN-gamma, were reduced in T cells responsive to PLP139-151. In the brains of mice that were successfully vaccinated, mRNA for IL-2, IL-15, and IFN-gamma were reduced. A mechanism underlying the reduction in severity and incidence of paralytic autoimmune disease and the reduction in Th1 cytokines involves altered costimulation of T cells; loading of APCs with DNA encoding PLP139-151 reduced the capacity of a T cell line reactive to PLP139-151 to proliferate even in the presence of exogenous CD28 costimulation. DNA immunization with the myelin minigene for PLP-altered expression of B7.1 (CD80), and B7.2 (CD86) on APCs in the spleen. Suppressive immunization against self-Ags encoded by DNA may be exploited to treat autoimmune diseases.
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MESH Headings
- Animals
- Autoantigens/administration & dosage
- Autoantigens/genetics
- Autoantigens/immunology
- Base Sequence
- Encephalomyelitis, Autoimmune, Experimental/etiology
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/prevention & control
- Female
- Immunosuppressive Agents/administration & dosage
- Immunosuppressive Agents/immunology
- Injections, Intramuscular
- Lymphocyte Activation/genetics
- Mice
- Mice, Inbred Strains
- Molecular Sequence Data
- Myelin Proteolipid Protein/administration & dosage
- Myelin Proteolipid Protein/genetics
- Myelin Proteolipid Protein/immunology
- Peptide Fragments/administration & dosage
- Peptide Fragments/genetics
- Peptide Fragments/immunology
- T-Lymphocytes/immunology
- Th1 Cells/immunology
- Vaccines, DNA/administration & dosage
- Vaccines, DNA/immunology
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Affiliation(s)
- P J Ruiz
- Department of Neurology and Neurological Sciences, Beckman Center for Molecular Medicine, Stanford University, CA 94305, USA
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