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Roy V, Lamontagne R, Talagas M, Touzel-Deschênes L, Khuong HT, Saikali S, Dupré N, Gros-Louis F. Biofabrication of a three dimensional human-based personalized neurofibroma model. Biotechnol J 2021; 16:e2000250. [PMID: 33689228 DOI: 10.1002/biot.202000250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 02/25/2021] [Accepted: 03/04/2021] [Indexed: 12/27/2022]
Abstract
Neurofibromas are the most characteristic feature of neurofibromatosis type 1 (NF1), a multisystemic disorder caused by aberrations in the neurofibromin gene (NF1). Despite significant progress over the last several years in understanding this disease, a suitable in vitro model to better mimic neurofibroma formation and growth has yet to be described. There is therefore a need to establish an in vitro, three dimensional model that allows the incorporation of multicellular lineages and the modulation of the cellular microenvironment-known to be important for cellular crosstalk and distribution of soluble factors-to study neurofibroma biology and morphogenesis. A self-assembly approach was used to generate tissue-engineered skins (TES) in which patient-derived spheroids made of NF1-associated Schwann cells and fibroblasts were seeded. We describe the first in vitro three dimensional neurofibroma model-directly derived from NF1 patients presenting with histopathological features-having an ECM protein expression profile quite similar to that of a native tumor. We observed efficient incorporation, proliferation, and migration of spheroids within NF1-TES over time. This biotechnological approach could provide a unique tool for precision medicine targeting NF1 and for assessing the tumorigenic properties of each NF1 gene mutation linked to tumor formation.
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Affiliation(s)
- Vincent Roy
- Department of Surgery, Faculty of Medicine, Université Laval, Quebec City, Quebec City, Canada.,Division of Regenerative Medicine, LOEX, CHU de Québec-Université Laval Research Center, Quebec City, Quebec City, Canada
| | - Rémy Lamontagne
- Department of Surgery, Faculty of Medicine, Université Laval, Quebec City, Quebec City, Canada.,Division of Regenerative Medicine, LOEX, CHU de Québec-Université Laval Research Center, Quebec City, Quebec City, Canada
| | - Matthieu Talagas
- Department of Surgery, Faculty of Medicine, Université Laval, Quebec City, Quebec City, Canada.,Laboratory on Interactions Neurons Keratinocytes (EA4685), Faculty of Medicine and Health Sciences, University of Western Brittany, Brest, France.,Department of Pathology, Brest University Hospital, Brest, France
| | - Lydia Touzel-Deschênes
- Division of Regenerative Medicine, LOEX, CHU de Québec-Université Laval Research Center, Quebec City, Quebec City, Canada
| | - Hélène T Khuong
- Department of Surgery, Faculty of Medicine, Université Laval, Quebec City, Quebec City, Canada.,Division of Regenerative Medicine, LOEX, CHU de Québec-Université Laval Research Center, Quebec City, Quebec City, Canada
| | - Stéphan Saikali
- Department of Medical Biology, CHU de Québec, Division of Anatomic Pathology and Neuropathology, Quebec City, Quebec City, Canada
| | - Nicolas Dupré
- Division of Regenerative Medicine, LOEX, CHU de Québec-Université Laval Research Center, Quebec City, Quebec City, Canada.,Division of Neurosciences, CHU de Québec-Université Laval Research Center, Quebec City, Quebec City, Canada
| | - François Gros-Louis
- Department of Surgery, Faculty of Medicine, Université Laval, Quebec City, Quebec City, Canada.,Division of Regenerative Medicine, LOEX, CHU de Québec-Université Laval Research Center, Quebec City, Quebec City, Canada
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Michaud K, de Tayrac M, D’Astous M, Paquet C, Gould PV, Saikali S. Impact of 9p deletion and p16, Cyclin D1, and Myc hyperexpression on the outcome of anaplastic oligodendrogliomas. PLoS One 2018; 13:e0193213. [PMID: 29489901 PMCID: PMC5831111 DOI: 10.1371/journal.pone.0193213] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 01/20/2018] [Indexed: 01/15/2023] Open
Abstract
Objective To study the presence of 9p deletion and p16, cyclin D1 and Myc expression and their respective diagnostic and prognostic interest in oligodendrogliomas. Methods We analyzed a retrospective series of 40 consecutive anaplastic oligodendrogliomas (OIII) from a single institution and compared them to a control series of 10 low grade oligodendrogliomas (OII). Automated FISH analysis of chromosome 9p status and immunohistochemistry for p16, cyclin D1 and Myc was performed for all cases and correlated with clinical and histological data, event free survival (EFS) and overall survival (OS). Results Chromosome 9p deletion was observed in 55% of OIII (22/40) but not in OII. Deletion was highly correlated to EFS (median = 29 versus 53 months, p<0.0001) and OS (median = 48 versus 83 months, p<0.0001) in both the total cohort and the OIII population. In 9p non-deleted oligodendrogliomas, p16 hyperexpression correlated with a shorter OS (p = 0.02 in OII and p = 0.0001 in OIII) whereas lack of p16 expression was correlated to a shorter EFS and OS in 9p deleted OIII (p = 0.001 and p = 0.0002 respectively). Expression of Cyclin D1 was significantly higher in OIII (median expression 45% versus 14% for OII, p = 0.0006) and was correlated with MIB-1 expression (p<0.0001), vascular proliferation (p = 0.002), tumor necrosis (p = 0.04) and a shorter EFS in the total cohort (p = 0.05). Hyperexpression of Myc was correlated to grade (median expression 27% in OII versus 35% in OIII, p = 0.03), and to a shorter EFS in 9p non-deleted OIII (p = 0.01). Conclusion Chromosome 9p deletion identifies a subset of OIII with significantly worse prognosis. The combination of 9p status and p16 expression level identifies two distinct OIII populations with divergent prognosis. Hyperexpression of Bcl1 and Myc appears highly linked to anaplasia but the prognostic value is unclear and should be investigated further.
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Affiliation(s)
- Karine Michaud
- Department of Neurosurgery, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Marie de Tayrac
- Department of Genomic and Molecular Genetics, Centre Hospitalier Universitaire de Rennes, Rennes, France
| | - Myreille D’Astous
- Department of Neurosurgery, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Claudie Paquet
- Department of Pathology, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Peter Vincent Gould
- Department of Pathology, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Stéphan Saikali
- Department of Pathology, Centre Hospitalier Universitaire de Québec, Québec, Canada
- * E-mail:
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Dallaire-Théroux C, Callahan BL, Potvin O, Saikali S, Duchesne S. Radiological-Pathological Correlation in Alzheimer's Disease: Systematic Review of Antemortem Magnetic Resonance Imaging Findings. J Alzheimers Dis 2018; 57:575-601. [PMID: 28282807 DOI: 10.3233/jad-161028] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND The standard method of ascertaining Alzheimer's disease (AD) remains postmortem assessment of amyloid plaques and neurofibrillary degeneration. Vascular pathology, Lewy bodies, TDP-43, and hippocampal sclerosis are frequent comorbidities. There is therefore a need for biomarkers that can assess these etiologies and provide a diagnosis in vivo. OBJECTIVE We conducted a systematic review of published radiological-pathological correlation studies to determine the relationship between antemortem magnetic resonance imaging (MRI) and neuropathological findings in AD. METHODS We explored PubMed in June-July 2015 using "Alzheimer's disease" and combinations of radiological and pathological terms. After exclusion following screening and full-text assessment of the 552 extracted manuscripts, three others were added from their reference list. In the end, we report results based on 27 articles. RESULTS Independently of normal age-related brain atrophy, AD pathology is associated with whole-brain and hippocampal atrophy and ventricular expansion as observed on T1-weighted images. Moreover, cerebral amyloid angiopathy and cortical microinfarcts are also related to brain volume loss in AD. Hippocampal sclerosis and TDP-43 are associated with hippocampal and medial temporal lobe atrophy, respectively. Brain volume loss correlates more strongly with tangles than with any other pathological finding. White matter hyperintensities observed on proton density, T2-weighted and FLAIR images are strongly related to vascular pathologies, but are also associated with other histological changes such as gliosis or demyelination. CONCLUSION Cerebral atrophy and white matter changes in the living brain reflect underlying neuropathology and may be detectable using antemortem MRI. In vivo MRI may therefore be an avenue for AD pathological staging.
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Affiliation(s)
- Caroline Dallaire-Théroux
- CERVO Brain Research Center, Institut Universitaire en Santé Mentale de Québec, Quebec City, Quebec, Canada.,Faculty of Medicine, Université Laval, Quebec City, Quebec, Canada
| | - Brandy L Callahan
- CERVO Brain Research Center, Institut Universitaire en Santé Mentale de Québec, Quebec City, Quebec, Canada.,Faculty of Medicine, Université Laval, Quebec City, Quebec, Canada.,Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Olivier Potvin
- CERVO Brain Research Center, Institut Universitaire en Santé Mentale de Québec, Quebec City, Quebec, Canada.,Faculty of Medicine, Université Laval, Quebec City, Quebec, Canada
| | - Stéphan Saikali
- Faculty of Medicine, Université Laval, Quebec City, Quebec, Canada.,Department of Pathology, Centre Hospitalier Universitaire de Quebec, Quebec, Canada
| | - Simon Duchesne
- CERVO Brain Research Center, Institut Universitaire en Santé Mentale de Québec, Quebec City, Quebec, Canada.,Faculty of Medicine, Université Laval, Quebec City, Quebec, Canada
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Aubry M, de Tayrac M, Etcheverry A, Clavreul A, Saikali S, Menei P, Mosser J. Correction: From the core to beyond the margin: a genomic picture of glioblastoma intratumor heterogeneity. Oncotarget 2016; 7:67685. [PMID: 28049185 PMCID: PMC5341905 DOI: 10.18632/oncotarget.12550] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Aubry M, de Tayrac M, Etcheverry A, Clavreul A, Saikali S, Menei P, Mosser J. From the core to beyond the margin: a genomic picture of glioblastoma intratumor heterogeneity. Oncotarget 2016; 6:12094-109. [PMID: 25940437 PMCID: PMC4494925 DOI: 10.18632/oncotarget.3297] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [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: 01/14/2015] [Accepted: 04/06/2015] [Indexed: 12/22/2022] Open
Abstract
Glioblastoma (GB) is a highly invasive primary brain tumor that almost systematically recurs despite aggressive therapies. One of the most challenging problems in therapy of GB is its extremely complex and heterogeneous molecular biology. To explore this heterogeneity, we performed a genome-wide integrative screening of three molecular levels: genome, transcriptome, and methylome. We analyzed tumor biopsies obtained by neuro-navigation in four distinct areas for 10 GB patients (necrotic zone, tumor zone, interface, and peripheral brain zone). We classified samples and deciphered a key genes signature of intratumor heterogeneity by Principal Component Analysis and Weighted Gene Co-expression Network Analysis. At the genome level, we identified common GB copy number alterations and but a strong interindividual molecular heterogeneity. Transcriptome analysis highlighted a pronounced intratumor architecture reflecting the surgical sampling plan of the study and identified gene modules associated with hallmarks of cancer. We provide a signature of key cancer-heterogeneity genes highly associated with the intratumor spatial gradient and show that it is enriched in genes with correlation between methylation and expression levels. Our study confirms that GBs are molecularly highly diverse and that a single tumor can harbor different transcriptional GB subtypes depending on its spatial architecture.
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Affiliation(s)
- Marc Aubry
- Université Rennes1, UEB, UMS 3480 Biosit, Faculté de Médecine, Rennes F-35043, France.,Plate-forme Génomique Santé Biosit, Université Rennes1, Rennes F-35043, France
| | - Marie de Tayrac
- CNRS, UMR 6290, Institut de Génétique et Développement de Rennes (IGdR), Rennes F-35043, France.,Université Rennes1, UEB, UMS 3480 Biosit, Faculté de Médecine, Rennes F-35043, France.,CHU Rennes, Service de Génétique Moléculaire et Génomique, Rennes F-35033, France
| | - Amandine Etcheverry
- CNRS, UMR 6290, Institut de Génétique et Développement de Rennes (IGdR), Rennes F-35043, France.,Université Rennes1, UEB, UMS 3480 Biosit, Faculté de Médecine, Rennes F-35043, France.,CHU Rennes, Service de Génétique Moléculaire et Génomique, Rennes F-35033, France
| | - Anne Clavreul
- INSERM UMR-1066, Micro et Nano-Médecines Biomimétiques (MINT), Angers F-49933, France
| | - Stéphan Saikali
- CHU Rennes, Service d'Anatomie et Cytologie Pathologiques, Rennes F-35033, France.,Service d'Anatomie Pathologique, Hôpital de l'Enfant-Jésus, Québec, Canada
| | - Philippe Menei
- INSERM UMR-1066, Micro et Nano-Médecines Biomimétiques (MINT), Angers F-49933, France.,CHU Angers, Département de Neurochirurgie, Angers F-49933, France
| | - Jean Mosser
- CNRS, UMR 6290, Institut de Génétique et Développement de Rennes (IGdR), Rennes F-35043, France.,Université Rennes1, UEB, UMS 3480 Biosit, Faculté de Médecine, Rennes F-35043, France.,Plate-forme Génomique Santé Biosit, Université Rennes1, Rennes F-35043, France.,CHU Rennes, Service de Génétique Moléculaire et Génomique, Rennes F-35033, France
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Duval C, de Tayrac M, Michaud K, Cabillic F, Paquet C, Gould PV, Saikali S. Automated Analysis of 1p/19q Status by FISH in Oligodendroglial Tumors: Rationale and Proposal of an Algorithm. PLoS One 2015; 10:e0132125. [PMID: 26135922 PMCID: PMC4489714 DOI: 10.1371/journal.pone.0132125] [Citation(s) in RCA: 7] [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: 05/14/2015] [Accepted: 06/10/2015] [Indexed: 11/28/2022] Open
Abstract
Objective To propose a new algorithm facilitating automated analysis of 1p and 19q status by FISH technique in oligodendroglial tumors with software packages available in the majority of institutions using this technique. Methods We documented all green/red (G/R) probe signal combinations in a retrospective series of 53 oligodendroglial tumors according to literature guidelines (Algorithm 1) and selected only the most significant combinations for a new algorithm (Algorithm 2). This second algorithm was then validated on a prospective internal series of 45 oligodendroglial tumors and on an external series of 36 gliomas. Results Algorithm 2 utilizes 24 G/R combinations which represent less than 40% of combinations observed with Algorithm 1. The new algorithm excludes some common G/R combinations (1/1, 3/2) and redefines the place of others (defining 1/2 as compatible with normal and 3/3, 4/4 and 5/5 as compatible with imbalanced chromosomal status). The new algorithm uses the combination + ratio method of signal probe analysis to give the best concordance between manual and automated analysis on samples of 100 tumor cells (91% concordance for 1p and 89% concordance for 19q) and full concordance on samples of 200 tumor cells. This highlights the value of automated analysis as a means to identify cases in which a larger number of tumor cells should be studied by manual analysis. Validation of this algorithm on a second series from another institution showed a satisfactory concordance (89%, κ = 0.8). Conclusion Our algorithm can be easily implemented on all existing FISH analysis software platforms and should facilitate multicentric evaluation and standardization of 1p/19q assessment in gliomas with reduction of the professional and technical time required.
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Affiliation(s)
- Céline Duval
- Department of pathology, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Marie de Tayrac
- Department of genomic and molecular genetics, Centre Hospitalier Universitaire de Rennes, Rennes, France
| | - Karine Michaud
- Department of Neurosurgery, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Florian Cabillic
- Department of cytogenetics and cellular biology, Centre Hospitalier Universitaire de Rennes, Rennes, France
| | - Claudie Paquet
- Department of pathology, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Peter Vincent Gould
- Department of pathology, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Stéphan Saikali
- Department of pathology, Centre Hospitalier Universitaire de Québec, Québec, Canada
- * E-mail:
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Aubry M, de Tayrac M, Etcheverry A, Clavreul A, Saikali S, Menei P, Mosser J. O4.04 * 'FROM THE CORE TO BEYOND THE MARGIN': A GENOMIC PICTURE OF GLIOBLASTOMA INTRATUMOR HETEROGENEITY. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou174.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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8
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Duval C, de Tayrac M, Sanschagrin F, Michaud K, Gould PV, Saikali S. ImmunoFISH is a reliable technique for the assessment of 1p and 19q status in oligodendrogliomas. PLoS One 2014; 9:e100342. [PMID: 24949947 PMCID: PMC4065070 DOI: 10.1371/journal.pone.0100342] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 04/11/2014] [Accepted: 05/23/2014] [Indexed: 11/19/2022] Open
Abstract
Objective To develop a new ImmunoFISH technique for the study of oligodendrogliomas by combining a standard immunohistochemical stain using MIB-1 antibody with a standard FISH technique using commercial 1p36 and 19q13 chromosomal probes. Methods Validation was performed by two observers on a series of 36 pre-selected oligodendrogliomas and compared to the results previously determined by FISH alone. Results The ImFISH technique is easy to perform and to analyze and is no more time-consuming than the usual FISH technique. Our results show that the inter-observer reliability of ImFISH is high (κ = 0.86 and 0.95 respectively for 1p and 19q). Compared to FISH, the ImFISH exhibits a very high sensitivity (∼100%) and specificity (∼90%) for 1p and/or 19q deleted cases. The sensitivity is high for normal cases (∼85%) and imbalanced cases (∼90%) with a specificity ranging between 50 and 85%. Finally, there were no significant differences between FISH and ImFISH results calculated on 60, 40 or 20 cells. Conclusion Our study demonstrates the reliability of the ImFISH technique in oligodendrogliomas and emphasizes its advantage in poorly cellular tumoral specimen.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Antibodies, Antinuclear/metabolism
- Antibodies, Monoclonal/metabolism
- Brain Neoplasms/genetics
- Brain Neoplasms/metabolism
- Chromosomes, Human, Pair 1/genetics
- Chromosomes, Human, Pair 1/metabolism
- Chromosomes, Human, Pair 19/genetics
- Chromosomes, Human, Pair 19/metabolism
- Female
- Humans
- Immunohistochemistry
- In Situ Hybridization, Fluorescence/methods
- Male
- Middle Aged
- Observer Variation
- Oligodendroglioma/genetics
- Oligodendroglioma/metabolism
- Reproducibility of Results
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Affiliation(s)
- Céline Duval
- Department of Pathology, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Marie de Tayrac
- Department of genomic and molecular genetics, Centre Hospitalier Universitaire de Rennes, Rennes, France
| | - François Sanschagrin
- Department of Pathology, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Karine Michaud
- Department of Neurosurgery, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Peter Vincent Gould
- Department of Pathology, Centre Hospitalier Universitaire de Québec, Québec, Canada
| | - Stéphan Saikali
- Department of Pathology, Centre Hospitalier Universitaire de Québec, Québec, Canada
- * E-mail:
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Avril T, Vauleon E, Hamlat A, Saikali S, Etcheverry A, Delmas C, Diabira S, Mosser J, Quillien V. Human glioblastoma stem-like cells are more sensitive to allogeneic NK and T cell-mediated killing compared with serum-cultured glioblastoma cells. Brain Pathol 2011; 22:159-74. [PMID: 21790828 DOI: 10.1111/j.1750-3639.2011.00515.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Glioblastoma multiforme (GBM) is the most dramatic primary brain cancer with a very poor prognosis because of inevitable disease recurrence. The median overall survival is less than 1 year after diagnosis. Cancer stem cells have recently been disclosed in GBM. GBM stem-like cells (GSCs) exhibit resistance to radio/chemotherapeutic treatments and are therefore considered to play an important role in disease recurrence. GSCs are thus appealing targets for new treatments for GBM patients. In this study, we show that GBM cells with stem cell characteristics are resistant to lysis mediated by resting natural killer (NK) cells because of the expression of MHC class I molecules. However, GSCs are killed by lectin-activated NK cells. Furthermore, in experiments using the therapeutic antibody CetuximAb, we show that GSCs are sensitive to antibody-mediated cytotoxicity. We confirm the sensitivity of GSC to cytotoxicity carried out by IL2-activated NK cells and tumor-specific T cells. More importantly, we show that GSCs are more sensitive to NK and T cell-mediated lysis relatively to their corresponding serum-cultured GBM cells obtained from the same initial tumor specimen. Altogether, these results demonstrate the sensitivity of GSC to immune cell cytotoxicity and, therefore, strongly suggest that GSCs are suitable target cells for immunotherapy of GBM patients.
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Affiliation(s)
- Tony Avril
- Département de Biologie, Centre Eugène Marquis, Rennes, France.
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Saikali S, Meurice P, Sauleau P, Eliat PA, Bellaud P, Randuineau G, Vérin M, Malbert CH. A three-dimensional digital segmented and deformable brain atlas of the domestic pig. J Neurosci Methods 2010; 192:102-9. [PMID: 20692291 DOI: 10.1016/j.jneumeth.2010.07.041] [Citation(s) in RCA: 125] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Revised: 07/27/2010] [Accepted: 07/28/2010] [Indexed: 11/29/2022]
Abstract
We used high-magnetic field (4.7 T) magnetic resonance imaging (MRI) to build the first high-resolution (100 microm x 150 microm x 100 microm) three-dimensional (3D) digital atlas in stereotaxic coordinates of the brain of a female domestic pig (Sus scrofa domesticus). This atlas was constructed from one hemisphere which underwent a symmetrical transformation through the midsagittal plane. Concomitant construction of a 3D histological atlas based on the same scheme facilitated control of deep brain structure delimitation and enabled cortical mapping to be achieved. The atlas contains 178 individual cerebral structures including 42 paired and 9 single deep brain structures, 5 ventricular system areas, 6 paired deep cerebellar nuclei, 12 cerebellar lobules and 28 cortical areas per hemisphere. Given the increasing importance of pig brains in medical research, this atlas should be a useful tool for intersubject normalization in anatomical imaging as well as for precisely localizing brain areas in functional MR studies or electrode implantation trials. The atlas can be freely downloaded from our institution's Website.
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Affiliation(s)
- Stéphan Saikali
- Département d'Anatomie et Cytologie Pathologiques, CHU Pontchaillou, 2 rue Henri Le Guilloux, 35033 Rennes Cedex 09, France.
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Avril T, Saikali S, Vauleon E, Jary A, Hamlat A, De Tayrac M, Mosser J, Quillien V. Distinct effects of human glioblastoma immunoregulatory molecules programmed cell death ligand-1 (PDL-1) and indoleamine 2,3-dioxygenase (IDO) on tumour-specific T cell functions. J Neuroimmunol 2010; 225:22-33. [PMID: 20493562 DOI: 10.1016/j.jneuroim.2010.04.003] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2010] [Revised: 03/25/2010] [Accepted: 04/07/2010] [Indexed: 01/22/2023]
Abstract
Immunotherapy is a promising new treatment for patients suffering from glioma, in particular glioblastoma multiforme (GBM). However, tumour cells use different mechanisms to escape the immune responses induced by the treatment. As many other tumours, gliomas express or secrete several immunosuppressive molecules that regulate immune cell functions. In this study, we first analysed FasL, HLA-G, IDO, PDL-1 and TGF-beta1, -beta2 and -beta3 expression by transcriptomic microarray analysis in a series of 20 GBM samples and found respectively 15%, 60%, 85%, 30%, 70%, 80% and 35% of positive specimens. mRNA expression was then confirmed in 10 GBM primary cell lines and 2 immortalised cell lines U251 and U87MG. Furthermore, the protein expression of PDL-1, IDO activity and TGF-beta2 secretion were found on most of the untreated GBM primary cell lines. Remarkably, treatment with IFN-gamma increased the PDL-1 cell surface expression and the IDO activity, but reduced the TGF-beta2 secretion of GBM cell lines. We finally analysed the immunosuppressive effects of IDO, PDL-1 and TGF-beta1-3 by measuring IFN-gamma production and cell cytotoxicity activity of tumour antigen-specific T cells. PDL-1 partially affected the IFN-gamma production of antigen-specific T cells in response to GBM primary cell lines, and IDO inhibited lymphocyte proliferation induced by lectins. None of these molecules directly affected the T cell cytotoxicity function. Due to the functional role of PDL-1 and IDO molecules expressed by GBM cells, one could expect that blocking these molecules in the immunotherapy strategies would reinforce the efficiency of these treatments of GBM patients.
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Affiliation(s)
- Tony Avril
- Département de Biologie, Centre Eugène Marquis, Rennes, France.
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Ferré JC, Heautot JF, Saikali S, Gauvrit JY. Neurological picture. From carotid atherosclerosis plaque to brain in a single routine clinical MRI study at high field. J Neurol Neurosurg Psychiatry 2009; 80:1223-4. [PMID: 19864657 DOI: 10.1136/jnnp.2008.166769] [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] [Indexed: 11/04/2022]
Affiliation(s)
- J-C Ferré
- Department of Neuroradiology, CHU Pontchaillou, 2 rue Henri Le Guilloux, 35000 Rennes, France
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Figarella-Branger D, Metellus P, Barrié M, Maues de Paula A, Fernandez C, Polivka M, Vital A, Labrousse F, Vignaud JM, Laquerrière A, Rousselet MC, Lacroix C, Saikali S, Chapon F, Gontier MF, Chrétien F, Babin P, Rigau V, Vandenbos F, Peoc'h M, Kujas M, Chinot O, Gouvernet J, Giorgi R, Guyotat J, Jouvet A. Épendymomes intracrâniens de l'adulte. Diagnostic histologique et facteurs histopronostiques. Neurochirurgie 2007; 53:76-84. [PMID: 17445840 DOI: 10.1016/j.neuchi.2006.11.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Accepted: 11/29/2006] [Indexed: 11/22/2022]
Abstract
BACKGROUND Intracranial ependymomas are rare in adults and histopathological prognostic factors are poorly determined. PURPOSE A retrospective multicentric study was conducted in France in order to assess the prognostic value of histology. MATERIAL Between 1990 and 2004, 216 adult patients with newly diagnosed ependymomas were treated in 19 French centers. Eligibility required institutional histopathological confirmation of an ependymoma and available clinical history and MRI features (see comparison paper). METHODS Histological preparations and one paraffin embedded block from each patient were sent to Pr D. Figarella-Branger in Marseille. Central review by four neuropathologists (D. Figarella-Branger, A. Maues de Paula, C. Fernandez and A. Jouvet) was performed. Specimens for which all pathologists agreed with the histological diagnosis of ependymomas were included, whereas cases for which all disagree were excluded and reclassified. In the event of doubt and/or discrepancies between pathologists immunostaining was performed in order to reach a consensus diagnosis. Diagnostic of ependymomas was confirmed in 121 cases (56%). In theses cases, ependymomas were classified according to the WHO system (subtype and grade). The potential prognostic value (overall survival OS and disease free survival DFS) of the following histological parameters was examined: perivascular pseudorosettes, ependymal rosettes, hyalinized vessels, mitotic index, microvascular proliferation, necrosis, area of increased cellularity, nuclear atypia, brain invasion and Mib-1 labelling index. RESULTS Among the 121 ependymomas, 88 were grade II (47 classic, 17 cellular, 2 papillar, 6 clear cells and 16 tanicytic) and 33 grade III. WHO grading, occurrence of microvascular proliferation, necrosis, nuclear atypia and high proliferative index were correlated with both OS and DFS. Moreover, quantification of certain parameters enabled a reproducible grading system correlated with both OS and DFS.
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Affiliation(s)
- D Figarella-Branger
- Service d'anatomie pathologique et de neuropathologie, hôpital de la Timone, 264, rue Saint-Pierre, 13385 Marseille cedex 05, France.
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Saikali S, Avril T, Collet B, Hamlat A, Bansard JY, Drenou B, Guegan Y, Quillien V. Expression of nine tumour antigens in a series of human glioblastoma multiforme: interest of EGFRvIII, IL-13Ralpha2, gp100 and TRP-2 for immunotherapy. J Neurooncol 2006; 81:139-48. [PMID: 17004103 DOI: 10.1007/s11060-006-9220-3] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2006] [Accepted: 07/12/2006] [Indexed: 01/03/2023]
Abstract
In this study, we investigated the mRNA and protein expression of nine tumour antigens in human glioblastoma multiforme with a view to their possible use in dendritic cell-based immunotherapy. Expression of ALK, EGFRvIII, GALT3, gp100, IL-13Ralpha2, MAGE-A3, NA17-A, TRP-2 and tyrosinase were studied by real-time RT-PCR on frozen tissues using a series of 47 tumour samples from patients with glioblastoma. Results were compared with non-neoplastic brain expression or glioblastoma samples with very low levels of expression near the limits of detection for EGFRvIII and MAGE-A3, as these latter two antigens were not detected in non-neoplastic brain. Tumour antigens showing a 5-fold increase in mRNA expression were considered as positive, and only antigens displaying an mRNA over-expression in a significant number of cases were analysed by immunohistochemistry on paraffin-embedded sections. Using real time RT-PCR, we found EGFRvIII, gp100, IL-13Ralpha2 and TRP-2 to be positive in 64, 38, 32 and 21% of cases, respectively. While we observed no over-expression for ALK, GALT3 and tyrosinase, 3 samples out of 47 were positive for MAGE-3 and 1 sample for NA17-A. More than 25% of tumour cells showed strong protein expression in 13, 34, 85 and 96% of GBM samples for gp100, TRP-2, EGFRvIII and IL-13Ralpha2, respectively. Interestingly, protein expression of at least 3 antigens was observed in 38% of cases. These results point out the importance of EGFRvIII, IL-13Ralpha2 and, to a less extent gp100 and TRP-2, for developing an immunotherapy strategy against glioblastoma.
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Affiliation(s)
- Stéphan Saikali
- Département d'Anatomie et cytologie pathologiques, Hôpital Pontchaillou, Rennes, France
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Saikali S, Auger N, Hamlat A, Laviolle B, Guegan Y, Le Calve M. Étude rétrospective des remaniements chromosomiques de 1p et 19q et leur intérêt pronostique dans les oligodendrogliomes. À propos d’une série de 86 cas. Neurochirurgie 2005. [DOI: 10.1016/s0028-3770(05)83443-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Guegan Y, Le Calve M, Saikali S, Hamlat A, Auger N, Laviolle B. Intérêt pronostique de la déletion 1P/19Q dansles oligodendrogliomes. Étude rétrospective sur 86 patients. Neurochirurgie 2004. [DOI: 10.1016/s0028-3770(04)98381-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
The authors report a case of a huge colloid cyst of the septum pellucidum with acute worsening. A 42-year-old man was admitted for unexplained lethargy. A brain CT scan disclosed a huge intra-ventricular lesion. He experienced a sudden deterioration with coma, and was managed with bilateral ventricular external shunting. Total removal was performed a few days later using a right frontal trans-ventricular approach. The discussion focuses on colloid cyst potential to mimic other intracranial lesions, rendering accurate diagnosis difficult and leading to possibly inappropriate management in similar cases.
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Affiliation(s)
- A Hamlat
- Department of Neurosurgery, CHRU Pontchaillou, Rennes, France.
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Saikali S. Some interesting features of the Paris World Congress (July 1967). Rev Dent Liban 1968; 18:29-33. [PMID: 4869882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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