1
|
Zirem Y, Ledoux L, Roussel L, Maurage CA, Tirilly P, Le Rhun É, Meresse B, Yagnik G, Lim MJ, Rothschild KJ, Duhamel M, Salzet M, Fournier I. Real-time glioblastoma tumor microenvironment assessment by SpiderMass for improved patient management. Cell Rep Med 2024; 5:101482. [PMID: 38552622 PMCID: PMC11031375 DOI: 10.1016/j.xcrm.2024.101482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 01/15/2024] [Accepted: 03/01/2024] [Indexed: 04/19/2024]
Abstract
Glioblastoma is a highly heterogeneous and infiltrative form of brain cancer associated with a poor outcome and limited therapeutic effectiveness. The extent of the surgery is related to survival. Reaching an accurate diagnosis and prognosis assessment by the time of the initial surgery is therefore paramount in the management of glioblastoma. To this end, we are studying the performance of SpiderMass, an ambient ionization mass spectrometry technology that can be used in vivo without invasiveness, coupled to our recently established artificial intelligence pipeline. We demonstrate that we can both stratify isocitrate dehydrogenase (IDH)-wild-type glioblastoma patients into molecular sub-groups and achieve an accurate diagnosis with over 90% accuracy after cross-validation. Interestingly, the developed method offers the same accuracy for prognosis. In addition, we are testing the potential of an immunoscoring strategy based on SpiderMass fingerprints, showing the association between prognosis and immune cell infiltration, to predict patient outcome.
Collapse
Affiliation(s)
- Yanis Zirem
- Université de Lille, Inserm, CHU Lille, U1192 - Protéomique Réponse Inflammatoire Spectrométrie de Masse - PRISM, 59000 Lille, France
| | - Léa Ledoux
- Université de Lille, Inserm, CHU Lille, U1192 - Protéomique Réponse Inflammatoire Spectrométrie de Masse - PRISM, 59000 Lille, France
| | - Lucas Roussel
- Université de Lille, Inserm, CHU Lille, U1192 - Protéomique Réponse Inflammatoire Spectrométrie de Masse - PRISM, 59000 Lille, France
| | | | - Pierre Tirilly
- Université de Lille, CNRS, Centrale Lille, UMR 9189 CRIStAL, 59000 Lille, France
| | - Émilie Le Rhun
- Université de Lille, Inserm, CHU Lille, U1192 - Protéomique Réponse Inflammatoire Spectrométrie de Masse - PRISM, 59000 Lille, France; Departments of Neurosurgery and Neurology, Clinical Neuroscience Center, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
| | - Bertrand Meresse
- Université de Lille, Inserm, CHU Lille, U1286 - INFINITE - Institute for Translational Research in Inflammation, 59000 Lille, France
| | | | | | - Kenneth J Rothschild
- AmberGen, Inc., Billerica, MA, USA; Department of Physics and Photonics Center, Boston University, Boston, MA, USA
| | - Marie Duhamel
- Université de Lille, Inserm, CHU Lille, U1192 - Protéomique Réponse Inflammatoire Spectrométrie de Masse - PRISM, 59000 Lille, France
| | - Michel Salzet
- Université de Lille, Inserm, CHU Lille, U1192 - Protéomique Réponse Inflammatoire Spectrométrie de Masse - PRISM, 59000 Lille, France; Institut Universitaire de France (IUF), Paris, France.
| | - Isabelle Fournier
- Université de Lille, Inserm, CHU Lille, U1192 - Protéomique Réponse Inflammatoire Spectrométrie de Masse - PRISM, 59000 Lille, France; Institut Universitaire de France (IUF), Paris, France.
| |
Collapse
|
2
|
Lecerf S, Leroy M, Lebouvier T, Lebert F, Deramecourt V, Maurage CA, Pasquier F. Alzheimer's disease phenotypes misdiagnosed with frontotemporal lobar degeneration: A retrospective neuropathologic study. Alzheimers Dement 2020. [DOI: 10.1002/alz.039692] [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] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Simon Lecerf
- University of Lille, CHU, Inserm U1172, Distalz Lille France
| | - Melanie Leroy
- University of Lille, Inserm, CHU‐Lille, Lille Neuroscience & Cognition F‐59000 Lille France
| | - Thibaud Lebouvier
- University of Lille, Inserm, CHU‐Lille, Lille Neuroscience & Cognition F‐59000 Lille France
| | - Florence Lebert
- University of Lille, Inserm 1172, CHU, Licend, Distalz Lille France
| | | | | | | |
Collapse
|
3
|
Leroy M, Maurage CA, Pasquier F, Deramecourt V, Lebouvier T. CSF biomarkers in neuropathological Alzheimer's disease. Alzheimers Dement 2020. [DOI: 10.1002/alz.040217] [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] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Melanie Leroy
- University of Lille, Inserm, CHU‐Lille, Lille Neuroscience & Cognition F‐59000 Lille France
| | | | | | | | - Thibaud Lebouvier
- University of Lille, Inserm, CHU‐Lille, Lille Neuroscience & Cognition F‐59000 Lille France
| |
Collapse
|
4
|
Lottin M, Escande A, Peyre M, Sevestre H, Maurage CA, Chauffert B, Penel N. [What's new in the management of meningeal solitary fibrous tumor/hemangiopericytoma?]. Bull Cancer 2020; 107:1260-1273. [PMID: 33160607 DOI: 10.1016/j.bulcan.2020.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 07/08/2020] [Revised: 09/10/2020] [Accepted: 09/26/2020] [Indexed: 12/18/2022]
Abstract
Meningeal fibrous solitary tumors/hemangiopericytoma are rare and aggressive mesenchymal neoplasms considered as sarcomas. They represent less than 1% of intracranial tumors and derive from the pericytes of Zimmerman which permit capillary contraction. They tend to occur more often in males in the fifth decade. They are often revealed by intracranial hypertension. Some scannographic and MRI characteristics permit to distinguish meningeal fibrous solitary tumor/hemangiopericytoma from other meningeal tumors. Meningeal hemangiopericytoma and fibrous solitary tumors were considered as different entities until 2016. Following the discovery of an identical genetic event, the locus 12q13 chromosome inversion leading to a NAB2-STAT6 fusion with nuclear immunoreactivity for STAT6 protein, the 2016 WHO classification defines these tumors as a single entity. Meningeal fibrous solitary tumors/hemangiopericytoma have a high recurrence rate. Long-term recurrences may occur. Local relapses are more frequent than extracranial metastasis. A multimodal management is recommended to treat a localized disease. It involves a complete resection followed by adjuvant radiotherapy. When local recurrences occur, surgery or stereotactic radiosurgery permit sometimes a local control. Metastatic disease has a poor prognostic and a weak chimiosensitivity. Targeted therapies, like pazopanib, are a hopeful option.
Collapse
Affiliation(s)
- Marine Lottin
- CHU d'Amiens, service d'oncologie médicale, Amiens, France.
| | - Alexandre Escande
- Centre Oscar-Lambret, service universitaire de radiothérapie, Lille, France; Université de Lille, faculté de médecine, H. Warembourg, Lille, France; Université de Lille, Villeneuve d'Ascq, laboratoire CRIStAL, UMR 9189, Amiens, France
| | - Matthieu Peyre
- Sorbonnes universités, CHU de La Pitié Salpetrière, service de neurochirurgie, Paris, France
| | | | | | | | - Nicolas Penel
- Université de Lille, centre Oscar-Lambret, département d'oncologie médicale, Lille, France
| |
Collapse
|
5
|
Humez S, Delteil C, Maurage CA, Torrents J, Capuani C, Tuchtan L, Piercecchi MD. Does the medical autopsy still have a place in the current diagnostic process? A 6-year retrospective study in two French University hospitals. Forensic Sci Med Pathol 2019; 15:10.1007/s12024-019-00170-x. [PMID: 31707602 DOI: 10.1007/s12024-019-00170-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/11/2019] [Indexed: 11/30/2022]
Abstract
Medical autopsies have been in considerable decline for several decades, in France and worldwide. We aimed to determine whether a medical autopsy still currently has a role to play in diagnosis, by analyzing its performance and diagnostic limitations. This dual-centre retrospective descriptive study included all medical autopsies performed in the university hospitals of Lille and Marseille, France, between January 2007 and December 2012. Autopsies of fetuses or stillborn infants, or those related to sudden infant deaths and research protocols were excluded. 412 medical autopsies were included. The male:female ratio was 1.5:1 and mean age was 27.3 years. Half of all autopsies were pediatric. Regarding anatomical region and/or injury mechanism, a clinical diagnosis was suggested in 52.2% of cases, an autopsy diagnosis in 55.6% and a microscopic diagnosis in 81.8%. There was very low agreement between the clinician's suggested diagnosis and the final diagnosis, both for organ specific diseases and cause of death. Agreement was moderate between autopsy diagnoses and microscopic diagnoses for organ specific diseases and low for cause of death. From our findings we concluded that an autopsy associated with microscopic examination was still valuable in diagnosing cause of death. Microscopic examination was indispensable to determine certain causes of death.
Collapse
Affiliation(s)
- Sarah Humez
- Department of Pathology, Lille University Hospital, 2 avenue Oscar Lambret, 59000, Lille, France
| | - Clémence Delteil
- Forensic Department, La Timone University Hospital, 264 rue St Pierre, 13385, Marseille Cedex 05, France.
- Aix-Marseille University, CNRS, EFS, ADÈS, Marseille, France.
- Department of Forensic Pathology, 264 rue Saint Pierre, 13385, Marseille Cedex 5, France.
| | - Claude Alain Maurage
- Department of Pathology, Lille University Hospital, 2 avenue Oscar Lambret, 59000, Lille, France
| | - Julia Torrents
- Forensic Department, La Timone University Hospital, 264 rue St Pierre, 13385, Marseille Cedex 05, France
- Department of Pathology, La Timone University Hospital, 264 rue Saint-Pierre, 13005, Marseille, France
| | - Caroline Capuani
- Forensic Department, La Timone University Hospital, 264 rue St Pierre, 13385, Marseille Cedex 05, France
- Aix-Marseille University, CNRS, EFS, ADÈS, Marseille, France
| | - Lucile Tuchtan
- Forensic Department, La Timone University Hospital, 264 rue St Pierre, 13385, Marseille Cedex 05, France
- Aix-Marseille University, CNRS, EFS, ADÈS, Marseille, France
| | - Marie-Dominique Piercecchi
- Forensic Department, La Timone University Hospital, 264 rue St Pierre, 13385, Marseille Cedex 05, France
- Aix-Marseille University, CNRS, EFS, ADÈS, Marseille, France
| |
Collapse
|
6
|
Le Rhun E, Duhamel M, Drelich L, Zairi F, Reyns N, Wisztoski M, Maurage CA, Escande F, Salzet M, Fournier I. METB-10. EVALUATION OF NON-SUPERVISED MATRIX-ASSISTED LASER DESORPTION / IONIZATION MASS SPECTROMETRY IMAGING (MALDI) MASS SPECTROMETRY IMAGING (MSI) COMBINED WITH MICROPROTEOMICS FOR DETERMINATION OF GLIOBLASTOMA HETEROGENEITY. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.534] [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: 11/14/2022] Open
|
7
|
Thevenon J, Laurent G, Ader F, Laforêt P, Klug D, Duva Pentiah A, Gouya L, Maurage CA, Kacet S, Eicher JC, Albuisson J, Desnos M, Bieth E, Duboc D, Martin L, Réant P, Picard F, Bonithon-Kopp C, Gautier E, Binquet C, Thauvin-Robinet C, Faivre L, Bouvagnet P, Charron P, Richard P. High prevalence of arrhythmic and myocardial complications in patients with cardiac glycogenosis due to PRKAG2 mutations. Europace 2017; 19:651-659. [PMID: 28431061 DOI: 10.1093/europace/euw067] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Accepted: 02/23/2016] [Indexed: 12/20/2022] Open
Abstract
AIMS Mutations in PRKAG2, the gene encoding for the γ2 subunit of 5'-AMP-activated protein kinase (AMPK), are responsible for an autosomal dominant glycogenosis with a cardiac presentation, associating hypertrophic cardiomyopathy (HCM), ventricular pre-excitation (VPE), and progressive heart block. The aim of this study was to perform a retrospective time-to-event study of the clinical manifestations associated with PRKAG2 mutations. METHODS AND RESULTS A cohort of 34 patients from 9 families was recruited between 2001 and 2010. DNA were sequenced on all exons and flanking sequences of the PRKAG2 gene using Sanger sequencing. Overall, four families carried the recurrent p.Arg302Gln mutation, and the five others carried private mutations among which three had never been reported. In the total cohort, at 40 years of age, the risk of developing HCM was 61%, VPE 70%, conduction block 22%, and sudden cardiac death (SCD) 20%. The global survival at 60 years of age was 66%. Thirty-two per cent of patients (N = 10) required a device implantation (5 pacemakers and 5 defibrillators) at a median age of 66 years, and two patients required heart transplant. Only one patient presented with significant skeletal muscle symptoms. No significant differences regarding the occurrence of VPE, ablation complications, or death incidence were observed between different mutations. CONCLUSION This study of patients with PRKAG2 mutations provides a more comprehensive view of the natural history of this disease and demonstrates a high risk of cardiac complications. Early recognition of this disease appears important to allow an appropriate management.
Collapse
Affiliation(s)
- Julien Thevenon
- Centre de Génétique et Centre de Référence "Anomalies du Développement et Syndromes Malformatifs", Hôpital d'Enfants, CHU Dijon, Dijon, France
| | - Gabriel Laurent
- Service de Rythmologie et Insuffisance Cardiaque, Hôpital du Bocage, Centre Hospitalo-Universitaire de Dijon, Dijon, France
- Laboratoire LE2I UMR CNRS 5158, Université de Bourgogne, 9 avenue Alain Savary, Dijon, France
| | - Flavie Ader
- AP-HP, UF Cardiogénétique et Myogénétique, Service de Biochimie Métabolique, Groupe Hospitalier Pitié-Salpêtrière 47-83 boulevard de l'Hôpital, Paris cedex 13 75651, France
| | - Pascal Laforêt
- AP-HP, Centre de Référence de pathologie neuromusculaire Paris-Est, Groupe Hospitalier Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Didier Klug
- Hôpital Cardiologique, Bd du Pr Leclercq 59037, Lille, France
| | | | - Laurent Gouya
- INSERM U773, Centre de Recherche Biomédicale Bichat Beaujon CRB3, Université Paris 7 Denis Diderot, site Bichat, Paris, France
| | - Claude Alain Maurage
- Université Lille Nord de France, USDL, EA 1056, Lille F-59000, France
- Département de Pathologie, Hôpital Universitaire de Lille, Lille F-59000, France
- INSERM U837, Lille F-59000, France
| | - Salem Kacet
- Hôpital Cardiologique, Bd du Pr Leclercq 59037, Lille, France
| | - Jean-Christophe Eicher
- Service de Rythmologie et Insuffisance Cardiaque, Hôpital du Bocage, Centre Hospitalo-Universitaire de Dijon, Dijon, France
| | - Juliette Albuisson
- INSERM, UMRS_970, Paris Cardiovascular Research Center, Paris, France
- AP-HP, Département de génétique, Hôpital européen Georges-Pompidou, 20, rue Leblanc, Paris 75015, France
- Inserm U 633, faculté de médecine, université Paris-5, Paris 75015, France
| | - Michel Desnos
- INSERM, UMRS_970, Paris Cardiovascular Research Center, Paris, France
- AP-HP, Département de génétique, Hôpital européen Georges-Pompidou, 20, rue Leblanc, Paris 75015, France
- Inserm U 633, faculté de médecine, université Paris-5, Paris 75015, France
| | - Eric Bieth
- Department of Medical Genetics, Hôpital Purpan, Toulouse, France
| | - Denis Duboc
- AP-HP, Service de Cardiologie, Hôpital Cochin, Paris, France
| | - Laurent Martin
- Laboratoire d'anatomopathologie, Plateau technique de Biologie, CHU de Dijon, Dijon, France
| | - Patricia Réant
- Service de Cardiologie, Hôpital Haut-Lévèque, Pessac, France
| | - François Picard
- Service de Cardiologie, Hôpital Haut-Lévèque, Pessac, France
| | - Claire Bonithon-Kopp
- Centre d'investigation clinique-épidémiologie clinique/essais cliniques, CHU, Dijon, France
| | - Elodie Gautier
- Centre d'investigation clinique-épidémiologie clinique/essais cliniques, CHU, Dijon, France
| | - Christine Binquet
- Centre d'investigation clinique-épidémiologie clinique/essais cliniques, CHU, Dijon, France
| | - Christel Thauvin-Robinet
- Centre de Génétique et Centre de Référence "Anomalies du Développement et Syndromes Malformatifs", Hôpital d'Enfants, CHU Dijon, Dijon, France
| | - Laurence Faivre
- Centre de Génétique et Centre de Référence "Anomalies du Développement et Syndromes Malformatifs", Hôpital d'Enfants, CHU Dijon, Dijon, France
| | - Patrice Bouvagnet
- Service médico-chirurgical Cardiologie Pédiatrique et Congénitale Adulte, Laboratoire Cardiogénétique, CHU de Lyon HCL-GH Est-Hôpital Louis Pradel, 69677 BRON CEDEX, et EA4173 Université Lyon 1 et Hôpital du Nord-Ouest, Lyon, France
| | - Philippe Charron
- AP-HP, Centre de référence des maladies cardiaques héréditaires, Hôpital Ambroise Paré, Boulogne-Billancourt, Université de Versailles Saint Quentin en Yvelines, Paris, France
- AP-HP, Centre de référence des maladies cardiaques héréditaires, Inserm UMRS1166, Hôpital de la Pitié-Salpêtrière, Paris, France
| | - Pascale Richard
- AP-HP, UF Cardiogénétique et Myogénétique, Service de Biochimie Métabolique, Groupe Hospitalier Pitié-Salpêtrière 47-83 boulevard de l'Hôpital, Paris cedex 13 75651, France
- AP-HP, Centre de référence des maladies cardiaques héréditaires, Inserm UMRS1166, Hôpital de la Pitié-Salpêtrière, Paris, France
| |
Collapse
|
8
|
Le Rhun E, Grégoire V, Girard E, Baranzelli A, Baldacci S, Descarpentries C, Maurage CA, Cortot AB, Escande F. BMET-31. DETECTION OF EGFR MUTATIONS IN THE CEREBRO-SPINAL FLUID OF NON-SMALL CELL LUNG CANCERS. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now212.131] [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: 11/13/2022] Open
|
9
|
De Reuck J, Auger F, Durieux N, Deramecourt V, Cordonnier C, Pasquier F, Maurage CA, Leys D, Bordet R. Topography of Cortical Microbleeds in Alzheimer's Disease with and without Cerebral Amyloid Angiopathy: A Post-Mortem 7.0-Tesla MRI Study. Aging Dis 2015; 6:437-43. [PMID: 26618045 DOI: 10.14336/ad.2015.0429] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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: 02/11/2015] [Accepted: 04/29/2015] [Indexed: 11/01/2022] Open
Abstract
Cortical microbleeds (CMBs) detected on T2*-weighted gradient-echo (GRE) magnetic resonance imaging (MRI) are considered as a possible hallmark of cerebral amyloid angiopathy (CAA). The present post-mortem 7.0-tesla MRI study investigates whether topographic differences exist in Alzheimer's brains without (AD) and with CAA (AD-CAA). The distribution of CMBs in thirty-two post-mortem brains, consisting of 12 AD, 8 AD-CAA and 12 controls, was mutually compared on T2*-GRE MRI of six coronal sections of a cerebral hemisphere. The mean numbers of CMBs were determined in twenty-two different gyri. As a whole there was a trend of more CMBs on GRE MRI in the prefrontal section of the AD, the AD-CAA as well as of the control brains. Compared to controls AD brains had significantly more CMBs in the superior frontal, the inferior temporal, the rectus and the cinguli gyrus, and in the insular cortex. In AD-CAA brains CMBs were increased in all gyri with exception of the medial parietal gyrus and the hippocampus. AD-CAA brains showed a highly significant increase of CMBs in the inferior parietal gyrus (p value: 0.001) and a significant increase in the precuneus and the cuneus (p value: 0.01) compared to the AD brains. The differences in topographic distribution of CMBs between AD and AD-CAA brains should be further investigated on MRI in clinically suspected patients.
Collapse
Affiliation(s)
- J De Reuck
- Université de Lille 2, INSERM U1171, F-59000 Lille, France
| | - F Auger
- Université de Lille 2, INSERM U1171, F-59000 Lille, France
| | - N Durieux
- Université de Lille 2, INSERM U1171, F-59000 Lille, France
| | - V Deramecourt
- Université de Lille 2, INSERM U1171, F-59000 Lille, France
| | - C Cordonnier
- Université de Lille 2, INSERM U1171, F-59000 Lille, France
| | - F Pasquier
- Université de Lille 2, INSERM U1171, F-59000 Lille, France
| | - C A Maurage
- Université de Lille 2, INSERM U1171, F-59000 Lille, France
| | - D Leys
- Université de Lille 2, INSERM U1171, F-59000 Lille, France
| | - R Bordet
- Université de Lille 2, INSERM U1171, F-59000 Lille, France
| |
Collapse
|
10
|
Le Rhun E, Duhamel M, Wisztorski M, Zairi F, Maurage CA, Fournier I, Reyns N, Salzet M. METB-07CLASSIFICATION OF HIGH GRADE GLIOMA USING MATRIX-ASSISTED LASER DESORPTION/IONIZATION MASS SPECTROMETRY IMAGING (MALDI MSI): INTERIM RESULTS OF THE GLIOMIC STUDY. Neuro Oncol 2015. [DOI: 10.1093/neuonc/nov221.07] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
11
|
Le Rhun E, Chamberlain MC, Zairi F, Delmaire C, Idbaih A, Renaud F, Maurage CA, Grégoire V. Patterns of response to crizotinib in recurrent glioblastoma according to ALK and MET molecular profile in two patients. CNS Oncol 2015; 4:381-6. [PMID: 26498130 DOI: 10.2217/cns.15.30] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 01/08/2023] Open
Abstract
Two patients with an unmethylated MGMT promoter and IDH1 (R132H) wild-type recurrent glioblastoma were treated with crizotinib. Prolonged stabilization of the disease (17 months) was achieved in the first case. Interestingly, anaplastic lymphoma kinase (ALK) expression and c-MET protein overexpression was observed. Conversely, no response to crizotinib was obtained in the second case with MET protein overexpression and c-MET amplification but no ALK expression or ALK gene amplification. These case studies suggest that novel targeted ALK inhibitors may provide relevant clinical benefit in selected cases in which driver mutations are demonstrable.
Collapse
Affiliation(s)
- Emilie Le Rhun
- Neuro-Oncology, Neurosurgery Department, University Hospital - CHRU Lille, France.,Neurology, Medical Oncology Department, Oscar Lambret Center, Lille, France.,Inserm, U1192, Lille, France
| | - Marc C Chamberlain
- Neurology & Neurological Surgery, University of Washington, Fred Hutchinson Research Cancer Center, Seattle, WA 98109, USA
| | - Fahed Zairi
- Inserm, U1192, Lille, France.,Neurosurgery Department, University Hospital - CHRU Lille, France
| | | | - Ahmed Idbaih
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Service de neurologie 2-Mazarin; Sorbonne Universités, UPMC Univ Paris 06, UM 75.,Inserm, U 1127, CNRS, UMR 7225, ICM, F-75013 Paris, France
| | - Florence Renaud
- Neuropathology Department, University Hospital - CHRU Lille, France.,Lille University, Lille, France.,UMR-S, 1172 F-59000 Lille, France
| | - Claude Alain Maurage
- Neuropathology Department, University Hospital - CHRU Lille, France.,Lille University, Lille, France.,UMR-S, 1172 F-59000 Lille, France
| | - Valérie Grégoire
- Neuropathology Department, University Hospital - CHRU Lille, France.,Lille University, Lille, France.,UMR-S, 1172 F-59000 Lille, France
| |
Collapse
|
12
|
Hochart A, Escande F, Rocourt N, Grill J, Koubi-Pick V, Beaujot J, Meignan S, Vinchon M, Maurage CA, Leblond P. Long survival in a child with a mutated K27M-H3.3 pilocytic astrocytoma. Ann Clin Transl Neurol 2015; 2:439-43. [PMID: 25909089 PMCID: PMC4402089 DOI: 10.1002/acn3.184] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [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: 01/06/2015] [Accepted: 01/27/2015] [Indexed: 01/16/2023] Open
Abstract
We report the first case of a child with a H3F3A K27M mutated pilocytic astrocytoma, who presented with a 10 years survival, and underwent spontaneous malignant transformation. The complex tumoral chromosomal rearrangements were consistent for genomic instability and for the histopathological features of malignant transformation into glioblastoma. H3F3A K27M mutations are rarely observed in benign neoplasms and may be associated with an adverse outcome. This mutation might not be the major driver that led to the onset of tumorigenesis, and we could consider that the associated TP53 mutation, would be required for malignant transformation.
Collapse
Affiliation(s)
- Audrey Hochart
- Pediatric Oncology Unit, Oscar Lambret Center Lille, France
| | - Fabienne Escande
- Biochemistry and Molecular Biology Department, Lille University Hospital Lille, France
| | | | - Jacques Grill
- Vectorology and New Anticancer Treatments UMR CNRS 8203 and Department of Pediatric Oncology, Gustave Roussy and University Paris sud Villejuif, France
| | - Valérie Koubi-Pick
- Department of Molecular Medicine and Translational Research Laboratory, Gustave Roussy Villejuif, France
| | - Juliette Beaujot
- Neuropathology Department, Biology and Pathology Center, Lille University Hospital Lille, France
| | - Samuel Meignan
- Unité Tumorigénèse et Résistance au Traitement, INSERM U908, Oscar Lambret Center Lille, France
| | - Matthieu Vinchon
- Department of Pediatric Neurosurgery, Lille University Hospital Lille, France
| | - Claude Alain Maurage
- Groupe d'Etude en Neuropathologie Oncologique Pédiatrique (GENOP) and Neuropathology Department, Biology and CHULille F-59000, Lille, France
| | - Pierre Leblond
- Pediatric Oncology Unit, Oscar Lambret Center Lille, France ; Unité Tumorigénèse et Résistance au Traitement, INSERM U908, Oscar Lambret Center Lille, France
| |
Collapse
|
13
|
Poulain S, Boyle EM, Tricot S, Demarquette H, Doye E, Roumier C, Duthilleul P, Preudhomme C, Maurage CA, Morschhauser F. Absence of CXCR4 mutations but high incidence of double mutant in CD79A/B and MYD88 in primary central nervous system lymphoma. Br J Haematol 2015; 170:285-7. [PMID: 25643939 DOI: 10.1111/bjh.13293] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Stéphanie Poulain
- Service d'Hématologie-Immunologie -Cytogénétique, Centre Hospitalier de Valenciennes, Valenciennes, France.,Centre de Biologie Pathologie, CHRU, Lille, France.,Inserm U837, Institut de Recherche contre le Cancer de Lille, Lille, France
| | - Eileen M Boyle
- Service des Maladies du Sang, Hôpital Huriez, CHRU, Lille, France
| | - Sabine Tricot
- Service d'Hématologie Clinique, CH de Valenciennes, Valenciennes, France
| | | | | | - Christophe Roumier
- Centre de Biologie Pathologie, CHRU, Lille, France.,Inserm U837, Institut de Recherche contre le Cancer de Lille, Lille, France
| | - Patrick Duthilleul
- Service d'Hématologie-Immunologie -Cytogénétique, Centre Hospitalier de Valenciennes, Valenciennes, France
| | - Claude Preudhomme
- Centre de Biologie Pathologie, CHRU, Lille, France.,Inserm U837, Institut de Recherche contre le Cancer de Lille, Lille, France
| | | | | |
Collapse
|
14
|
Poulain S, Boyle EM, Roumier C, Demarquette H, Wemeau M, Geffroy S, Herbaux C, Bertrand E, Hivert B, Terriou L, Verrier A, Pollet JP, Maurage CA, Onraed B, Morschhauser F, Quesnel B, Duthilleul P, Preudhomme C, Leleu X. MYD88L265P mutation contributes to the diagnosis of Bing Neel syndrome. Br J Haematol 2014; 167:506-13. [DOI: 10.1111/bjh.13078] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 07/02/2014] [Indexed: 12/29/2022]
Affiliation(s)
- Stéphanie Poulain
- Service d'Hématologie-Immunologie -Cytogénétique; Centre Hospitalier de Valenciennes; Valenciennes France
- Laboratoire d'Hématologie; Centre de Biologie Pathologie; CHRU; Lille France
- U837; IRCL; Lille France
| | - Eileen M. Boyle
- U837; IRCL; Lille France
- Service des Maladies du Sang; Hôpital Huriez; CHRU; Lille France
| | - Christophe Roumier
- Laboratoire d'Hématologie; Centre de Biologie Pathologie; CHRU; Lille France
- U837; IRCL; Lille France
| | - Hélène Demarquette
- Service d'Hématologie Clinique; Centre Hospitalier de Valenciennes; Valenciennes France
| | - Mathieu Wemeau
- Service des Maladies du Sang; Hôpital Huriez; CHRU; Lille France
| | - Sandrine Geffroy
- Laboratoire d'Hématologie; Centre de Biologie Pathologie; CHRU; Lille France
| | - Charles Herbaux
- U837; IRCL; Lille France
- Service des Maladies du Sang; Hôpital Huriez; CHRU; Lille France
| | | | - Bénédicte Hivert
- Service des Maladies du Sang; Hôpital Huriez; CHRU; Lille France
| | - Louis Terriou
- Service des Maladies du Sang; Hôpital Huriez; CHRU; Lille France
| | - Albert Verrier
- Service de Neurologie; Centre hospitalier de Valenciennes; Valenciennes France
| | - Jean Paul Pollet
- Service d'Hématologie Clinique; Centre Hospitalier de Valenciennes; Valenciennes France
| | | | | | | | - Bruno Quesnel
- U837; IRCL; Lille France
- Service des Maladies du Sang; Hôpital Huriez; CHRU; Lille France
| | - Patrick Duthilleul
- Service d'Hématologie-Immunologie -Cytogénétique; Centre Hospitalier de Valenciennes; Valenciennes France
| | - Claude Preudhomme
- Laboratoire d'Hématologie; Centre de Biologie Pathologie; CHRU; Lille France
- U837; IRCL; Lille France
| | - Xavier Leleu
- U837; IRCL; Lille France
- Service des Maladies du Sang; Hôpital Huriez; CHRU; Lille France
| |
Collapse
|
15
|
De Reuck JL, Deramecourt V, Auger F, Durieux N, Cordonnier C, Devos D, Defebvre L, Moreau C, Caparros-Lefebvre D, Leys D, Maurage CA, Pasquier F, Bordet R. Iron deposits in post-mortem brains of patients with neurodegenerative and cerebrovascular diseases: a semi-quantitative 7.0 T magnetic resonance imaging study. Eur J Neurol 2014; 21:1026-31. [PMID: 24698410 DOI: 10.1111/ene.12432] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [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: 11/05/2013] [Accepted: 03/06/2014] [Indexed: 01/20/2023]
Abstract
BACKGROUND AND PURPOSE Accumulation of iron (Fe) is often detected in brains of people suffering from neurodegenerative diseases. However, no studies have compared the Fe load between these disease entities. The present study investigates by T2*-weighted gradient-echo 7.0 T magnetic resonance imaging (MRI) the Fe content in post-mortem brains with different neurodegenerative and cerebrovascular diseases. METHODS One hundred and fifty-two post-mortem brains, composed of 46 with Alzheimer's disease (AD), 37 with frontotemporal lobar degeneration (FTLD), 11 with amyotrophic lateral sclerosis, 13 with Lewy body disease, 14 with progressive supranuclear palsy, 16 with vascular dementia (VaD) and 15 controls without a brain disease, were examined. The Fe load was determined semi-quantitatively on T2*-weighted MRI serial brain sections in the claustrum, caudate nucleus, putamen, globus pallidus, thalamus, subthalamic nucleus, hippocampus, mamillary body, lateral geniculate body, red nucleus, substantia nigra and dentate nucleus. The disease diagnosis was made on subsequent neuropathological examination. RESULTS The Fe load was significantly increased in the claustrum, caudate nucleus and putamen of FTLD brains and to a lesser degree in the globus pallidus, thalamus and subthalamic nucleus. In the other neurodegenerative diseases no Fe accumulation was observed, except for a mild increase in the caudate nucleus of AD brains. In VaD brains no Fe increase was detected. CONCLUSIONS Only FTLD displays a significant Fe load, suggesting that impaired Fe homeostasis plays an important role in the pathogenesis of this heterogeneous disease entity.
Collapse
Affiliation(s)
- J L De Reuck
- Université Lille Nord de France, UDSL, EA 1046, Lille, France
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Ceccom J, Loukh N, Lauwers-Cances V, Touriol C, Nicaise Y, Gentil C, Uro-Coste E, Pitson S, Maurage CA, Duyckaerts C, Cuvillier O, Delisle MB. Reduced sphingosine kinase-1 and enhanced sphingosine 1-phosphate lyase expression demonstrate deregulated sphingosine 1-phosphate signaling in Alzheimer's disease. Acta Neuropathol Commun 2014; 2:12. [PMID: 24468113 PMCID: PMC3912487 DOI: 10.1186/2051-5960-2-12] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 01/18/2014] [Indexed: 12/14/2022] Open
Abstract
Background The accumulation of beta amyloid (Aβ) peptides, a hallmark of Alzheimer’s disease (AD) is related to mechanisms leading to neurodegeneration. Among its pleiotropic cellular effects, Aβ accumulation has been associated with a deregulation of sphingolipid metabolism. Sphingosine 1-phosphate (S1P) derived from sphingosine is emerging as a critical lipid mediator regulating various biological activities including cell proliferation, survival, migration, inflammation, or angiogenesis. S1P tissue level is low and kept under control through equilibrium between its synthesis mostly governed by sphingosine kinase-1 (SphK1) and its degradation by sphingosine 1-phosphate lyase (SPL). We have previously reported that Aβ peptides were able to decrease the activity of SphK1 in cell culture models, an effect that could be blocked by the prosurvival IGF-1/IGF-1R signaling. Results Herein, we report for the first time the expression of both SphK1 and SPL by immunohistochemistry in frontal and entorhinal cortices from 56 human AD brains. Immunohistochemical analysis revealed a decreased expression of SphK1 and an increased expression of SPL both correlated to amyloid deposits in the entorhinal cortex. Otherwise, analysis of brain tissue extracts showed a decrease of SphK1 expression in AD brains whereas SPL expression was increased. The content of IGF-1R, an activator of SphK1, was found decreased in AD brains as well as S1P1, the major receptor for S1P. Conclusions Collectively, these results highlight the importance of S1P in AD suggesting the existence of a global deregulation of S1P signaling in this disease from its synthesis by SphK1 and degradation by SPL to its signaling by the S1P1 receptor.
Collapse
|
17
|
|
18
|
Bozzini G, Colin P, Betrouni N, Maurage CA, Leroy X, Simonin S, Martin-Schmitt C, Villers A, Mordon S. Efficiency of 5-ALA mediated photodynamic therapy on hypoxic prostate cancer: a preclinical study on the Dunning R3327-AT2 rat tumor model. Photodiagnosis Photodyn Ther 2013; 10:296-303. [PMID: 23993856 DOI: 10.1016/j.pdpdt.2013.01.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Revised: 01/10/2013] [Accepted: 01/13/2013] [Indexed: 10/27/2022]
Abstract
OBJECTIVES To evaluate photodynamic therapy (PDT) using 5-ALA-induced protoporphyrin IX (PPIX) in an in vivo hypoxic tumor model and its monitoring using MRI. MATERIAL AND METHODS Dunning R3327-AT2 tumors were grafted in the neck of Copenhagen rats. PDT using 150 mg 5-ALA/kg i.v. was performed by focal interstitial illumination of the photosensitized tumor (λ=633 nm; fluence=100 J/cm(2)). MRI at baseline and 2 days after treatment (T1, T2 and dynamic gadolinium enhanced sequences) were performed. Necrosis volumes were determined on post-procedure MRI. Tumors were resected 2 days post-PDT and obtained necrosis was determined histopathologically. Intra-tumoral PPIX distribution was evaluated using confocal microscopy and tissue porphyrin quantification. RESULTS Twenty rats were treated divided into three groups: continuous (n=7), fractionated illumination (n=7), and a control group receiving only light or only ALA or neither (n=6). Baseline MRI confirmed the hypoxic character of tumors. Necrosis volumes determined on posttreatment MRI were not reproducible and presented with important geometric and volumetric variability. Average necrosis volumes of 0.39 cc (0-0.874 cc) in the continuous group, 0.24 cc (0.107-0.436 cc) in the fractionated group and 0.012 cc (0-0.071 cc) in the control group were observed. Intra-tumoral PPIX distribution was heterogeneous and PPIX quantification revealed low intra-tumoral concentration. CONCLUSION Necrosis volumes induced by 5-ALA-mediated PDT were highly variable and non reproducible, probably because of lack of intra-tissular oxygen. Photosensitizer was poorly represented inside the tumor and its distribution was heterogeneous. Our study suggests that 5-ALA-mediated PDT might not be the best management option for hypoxic prostatic adenocarcinoma.
Collapse
Affiliation(s)
- G Bozzini
- Lille University Hospital, Department of Urology, France.
| | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Reuck JD, Caparros-Lefebvre D, Deramecourt V, Maurage CA. Hippocampal microbleed on a post-mortem t(2)∗-weighted gradient-echo 7.0-tesla magnetic resonance imaging? Case Rep Neurol 2011; 3:223-6. [PMID: 22121349 PMCID: PMC3223029 DOI: 10.1159/000332611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 11/25/2022] Open
Abstract
The present post-mortem study of a brain from an Alzheimer patient showed on a T2∗-weighted gradient-echo 7.0-T MRI of a coronal brain section a hyposignal in the hippocampus, suggesting a microbleed. On the corresponding histological examination, only iron deposits around the granular cellular layer and in blood vessel walls of the hippocampus were observed without evidence of a bleeding. This case report illustrates that the detection of microbleeds on MRI has to be interpreted with caution.
Collapse
Affiliation(s)
- J De Reuck
- Université Lille Nord de France, Wattrelos, France
| | | | | | | |
Collapse
|
20
|
Costalat V, Sanchez M, Ambard D, Thines L, Lonjon N, Nicoud F, Brunel H, Lejeune JP, Dufour H, Bouillot P, Lhaldky JP, Kouri K, Segnarbieux F, Maurage CA, Lobotesis K, Villa-Uriol MC, Zhang C, Frangi AF, Mercier G, Bonafé A, Sarry L, Jourdan F. Biomechanical wall properties of human intracranial aneurysms resected following surgical clipping (IRRAs Project). J Biomech 2011; 44:2685-91. [PMID: 21924427 DOI: 10.1016/j.jbiomech.2011.07.026] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Revised: 07/13/2011] [Accepted: 07/28/2011] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND PURPOSE Individual rupture risk assessment of intracranial aneurysms is a major issue in the clinical management of asymptomatic aneurysms. Aneurysm rupture occurs when wall tension exceeds the strength limit of the wall tissue. At present, aneurysmal wall mechanics are poorly understood and thus, risk assessment involving mechanical properties is inexistent. Aneurysm computational hemodynamics studies make the assumption of rigid walls, an arguable simplification. We therefore aim to assess mechanical properties of ruptured and unruptured intracranial aneurysms in order to provide the foundation for future patient-specific aneurysmal risk assessment. This work also challenges some of the currently held hypotheses in computational flow hemodynamics research. METHODS A specific conservation protocol was applied to aneurysmal tissues following clipping and resection in order to preserve their mechanical properties. Sixteen intracranial aneurysms (11 female, 5 male) underwent mechanical uniaxial stress tests under physiological conditions, temperature, and saline isotonic solution. These represented 11 unruptured and 5 ruptured aneurysms. Stress/strain curves were then obtained for each sample, and a fitting algorithm was applied following a 3-parameter (C(10), C(01), C(11)) Mooney-Rivlin hyperelastic model. Each aneurysm was classified according to its biomechanical properties and (un)rupture status. RESULTS Tissue testing demonstrated three main tissue classes: Soft, Rigid, and Intermediate. All unruptured aneurysms presented a more Rigid tissue than ruptured or pre-ruptured aneurysms within each gender subgroup. Wall thickness was not correlated to aneurysmal status (ruptured/unruptured). An Intermediate subgroup of unruptured aneurysms with softer tissue characteristic was identified and correlated with multiple documented risk factors of rupture. CONCLUSION There is a significant modification in biomechanical properties between ruptured aneurysm, presenting a soft tissue and unruptured aneurysms, presenting a rigid material. This finding strongly supports the idea that a biomechanical risk factor based assessment should be utilized in the to improve the therapeutic decision making.
Collapse
Affiliation(s)
- V Costalat
- CHU Montpellier, Interventional Neuroradiology, Av Augstin Fliche, Montpellier, France.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Dhaenens CM, Tran H, Frandemiche ML, Carpentier C, Schraen-Maschke S, Sistiaga A, Goicoechea M, Eddarkaoui S, Van Brussels E, Obriot H, Labudeck A, Gevaert MH, Fernandez-Gomez F, Charlet-Berguerand N, Deramecourt V, Maurage CA, Buée L, Lopez de Munain A, Sablonnière B, Caillet-Boudin ML, Sergeant N. Mis-splicing of Tau exon 10 in myotonic dystrophy type 1 is reproduced by overexpression of CELF2 but not by MBNL1 silencing. Biochim Biophys Acta Mol Basis Dis 2011; 1812:732-42. [PMID: 21439371 DOI: 10.1016/j.bbadis.2011.03.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2010] [Revised: 03/16/2011] [Accepted: 03/17/2011] [Indexed: 12/13/2022]
Abstract
Tau is the proteinaceous component of intraneuronal aggregates common to neurodegenerative diseases called Tauopathies, including myotonic dystrophy type 1. In myotonic dystrophy type 1, the presence of microtubule-associated protein Tau aggregates is associated with a mis-splicing of Tau. A toxic gain-of-function at the ribonucleic acid level is a major etiological factor responsible for the mis-splicing of several transcripts in myotonic dystrophy type 1. These are probably the consequence of a loss of muscleblind-like 1 (MBNL1) function or gain of CUGBP1 and ETR3-like factor 1 (CELF1) splicing function. Whether these two dysfunctions occur together or separately and whether all mis-splicing events in myotonic dystrophy type 1 brain result from one or both of these dysfunctions remains unknown. Here, we analyzed the splicing of Tau exons 2 and 10 in the brain of myotonic dystrophy type 1 patients. Two myotonic dystrophy type 1 patients showed a mis-splicing of exon 10 whereas exon 2-inclusion was reduced in all myotonic dystrophy type 1 patients. In order to determine the potential factors responsible for exon 10 mis-splicing, we studied the effect of the splicing factors muscleblind-like 1 (MBNL1), CUGBP1 and ETR3-like factor 1 (CELF1), CUGBP1 and ETR3-like factor 2 (CELF2), and CUGBP1 and ETR3-like factor 4 (CELF4) or a dominant-negative CUGBP1 and ETR-3 like factor (CELF) factor on Tau exon 10 splicing by ectopic expression or siRNA. Interestingly, the inclusion of Tau exon 10 is reduced by CUGBP1 and ETR3-like factor 2 (CELF2) whereas it is insensitive to the loss-of-function of muscleblind-like 1 (MBNL1), CUGBP1 and ETR3-like factor 1 (CELF1) gain-of-function, or a dominant-negative of CUGBP1 and ETR-3 like factor (CELF) factor. Moreover, we observed an increased expression of CUGBP1 and ETR3-like factor 2 (CELF2) only in the brain of myotonic dystrophy type 1 patients with a mis-splicing of exon 10. Taken together, our results indicate the occurrence of a mis-splicing event in myotonic dystrophy type 1 that is induced neither by a loss of muscleblind-like 1 (MBNL1) function nor by a gain of CUGBP1 and ETR3-like factor 1 (CELF1) function but is rather associated to CUGBP1 and ETR3-like factor 2 (CELF2) gain-of-function.
Collapse
Affiliation(s)
- C M Dhaenens
- Inserm, U837-1, Alzheimer & Tauopathies, place de Verdun, F-59045 Lille, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
De Reuck J, Auger F, Cordonnier C, Deramecourt V, Durieux N, Pasquier F, Bordet R, Maurage CA, Leys D. Comparison of 7.0-T T₂*-magnetic resonance imaging of cerebral bleeds in post-mortem brain sections of Alzheimer patients with their neuropathological correlates. Cerebrovasc Dis 2011; 31:511-7. [PMID: 21422755 DOI: 10.1159/000324391] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Accepted: 01/14/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND In view of the increasing recognition of cerebral microbleeds (MCBs) with MRI, there is a need to validate their detection in post-mortem brains in patients with cerebrovascular diseases and dementia. MATERIALS AND METHODS Out of 20 post-mortem brains of patients with Alzheimer dementia and with different cerebrovascular lesions, 45 large sections of the cerebral hemispheres, brainstem and cerebellum were submitted to a 7.0-T T₂*-weighted MRI, and afterwards compared to the histological detection of haematomas, MCBs and mini-bleeds (MNBs). RESULTS The sensitivity, specificity, predictive positive value and predictive negative value of the T₂* imaging to detect MCBs and MNBs were excellent for those in the cortico-subcortical regions. There was a significant overestimation of MNBs in the striatum due to iron deposits unrelated to old haemorrhages. Also in the deep white matter, 42% of MNBs were not detected, while 31% of T₂* hyposignals were not due to MNBs but to vessels filled with post-mortem thrombi. CONCLUSIONS When evaluating the 'bleeding load' with 7.0-T T₂*-weighted MRI in post-mortem brain sections of patients with dementia and vascular risk factors, only quantification of small cerebral bleeds in the cortico-subcortical regions is reliable.
Collapse
Affiliation(s)
- J De Reuck
- Université Lille Nord de France, UDSL, EA 1056, Lille, France.
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
De Reuck J, Deramecourt V, Cordonnier C, Leys D, Maurage CA, Pasquier F. The impact of cerebral amyloid angiopathy on the occurrence of cerebrovascular lesions in demented patients with Alzheimer features: a neuropathological study. Eur J Neurol 2011; 18:913-8. [PMID: 21244582 DOI: 10.1111/j.1468-1331.2010.03329.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The aim of this neuropathological study was to determine the prevalence of the different cerebrovascular lesions to be attributed to cerebral amyloid angiopathy (CAA) and of those associated with the severity of the Alzheimer dementia (AD) itself. PATIENTS AND METHODS The cerebrovascular lesions were compared separately in 40 brains of patients with mild and 50 with severe AD features. In the two groups, the number of lesions were compared between the brains with severe and those with mild of absent CAA. RESULTS The age of the patients, the vascular risk factors and antithrombotic treatment were similar in all the compared groups. The brains with mild and severe AD features and with CAA contained more haematomas, cortical micro-infarcts and micro-bleeds, and more severe white matter changes, and cortico-subcortical and white matter mini-bleeds. In the CAA brains with severe AD features, also more cortical territorial infarcts were observed, compared to those with mild AD features. CONCLUSIONS The increase in cortical infarcts cannot be attributed to the CAA alone, but also to the severity of the degenerative features, implying additional vascular factors in the pathogenesis of AD.
Collapse
Affiliation(s)
- J De Reuck
- Université Lille Nord de France, UDSL, EA 1056, Lille, France.
| | | | | | | | | | | |
Collapse
|
24
|
Rousset-Caron MM, Wolowiec D, Czapiga B, Maurage CA, Trentesaux T, Nawrocki L. Meningioma of the cavernous sinus in a child: case report and review of the literature. Clin Neuropathol 2009; 28:281-286. [PMID: 19642507] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
Meningiomas infrequently develop in children, and their clinical picture is somewhat different than in adults. We describe here a case of a meningioma in a 9-year-old girl unusual in two aspects. Firstly, it arose from the cavernous sinus what is exceptional in children. Secondly, despite the big tumor mass the child was almost asymptomatic. The only symptoms at presentation were a slight facial asymmetry and minimal laterodeviation of her mandible. Those symptoms had not been noticed by her parents and were detected during careful routine dental examination. The clinical course was quite aggressive and several neurosurgical interventions were necessary. This case underlines the importance of careful medical and dental examination during routine checkup consultations and undertaking necessary diagnostic procedures aimed at elucidating of all detected, even minimal abnormalities.
Collapse
Affiliation(s)
- M M Rousset-Caron
- Laboratory for Cranial Development and Prevention, Department of Paediatric Dentistry, Faculty of Dentistry, University of Lille, Lille, France
| | | | | | | | | | | |
Collapse
|
25
|
Deramecourt V, Lebert F, Buee L, Maurage CA, Pasquier F. O1‐02‐02: Prediction of neuropathology in primary progressive language and speech disorders. Alzheimers Dement 2009. [DOI: 10.1016/j.jalz.2009.05.197] [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] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Vincent Deramecourt
- Memory ClinicUniversity HospitalLilleFrance
- EA2691Lille II UniversityLilleFrance
| | - Florence Lebert
- Memory ClinicUniversity HospitalLilleFrance
- EA2691Lille II UniversityLilleFrance
| | | | - Claude Alain Maurage
- INSERM U837JPARCLilleFrance
- Neuropathology DepartmentUniversity HospitalLilleFrance
| | - Florence Pasquier
- Memory ClinicUniversity HospitalLilleFrance
- EA2691Lille II UniversityLilleFrance
| |
Collapse
|
26
|
Schraen-Maschke S, Dhaenens CM, Bombois S, Deramecourt V, Van Brussel E, Obriot H, Marzys C, Sergeant N, Maurage CA, Pasquier F, Sablonnière B, Buée L. [Biological markers in Alzheimer disease: what are the chances for less slow diagnosis?]. Rev Neurol (Paris) 2009; 165 Spec No 2:F97-F103. [PMID: 19593884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
|
27
|
Bruandet A, Richard F, Bombois S, Maurage CA, Deramecourt V, Lebert F, Amouyel P, Pasquier F. Alzheimer disease with cerebrovascular disease and vascular dementia: clinical features and course compared with Alzheimer disease. J Neurol Neurosurg Psychiatry 2009; 80:133-9. [PMID: 18977819 DOI: 10.1136/jnnp.2007.137851] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE Vascular dementia (VaD) and Alzheimer disease with cerebrovascular disease (AD+CVD) are the leading causes of dementia after Alzheimer disease alone (AD). Little is known about the progression of either VaD or AD+CVD. The aim of this study was to compare demographic features, cognitive decline and survival of patients with VaD, AD+CVD and AD alone attending a memory clinic. METHODS This study included 970 patients who were followed at the Lille-Bailleul memory clinic, France. Cognitive functions were measured with the Mini Mental State Examination (MMSE) and the Dementia Rating Scale (DRS). Survival rate was analysed with a left-truncated Cox model. Analyses were adjusted for age, sex, education, hypertension, diabetes and baseline MMSE and DRS. RESULTS Of 970 patients, 141 had VaD, 663 AD alone and 166 AD+CVD. The latter were significantly older than AD or VaD patients at onset (71 (SD 7) vs 69 (9) and 68 (9) years, p = 0.01) and at first visit (75 (6) vs 73 (8) and 72 (8) years, p = 0.0002). Baseline MMSE and DRS evaluations were highest for VaD compared with AD alone or AD+CVD patients (p<0.006). Cognitive decline during follow-up was slowest for VaD, intermediate for AD+CVD and fastest for AD alone (p = 0.03). After adjustment, compared with AD patients, mortality risk was similar for those with VaD (relative mortality risk (RR) = 0.7 (0.5 to 1.1)) and tended to be lower for AD+CVD (RR = 0.7 (0.5 to 1.0)). The shorter the delay between first symptoms and first visit, the longer patients survived. CONCLUSION This clinical cohort study shows that patients with VaD, AD+CVD and AD present different characteristics at baseline and during follow-up, and underlines the need to distinguish between them.
Collapse
|
28
|
Bruandet A, Richard F, Bombois S, Maurage CA, Masse I, Amouyel P, Pasquier F. Cognitive decline and survival in Alzheimer's disease according to education level. Dement Geriatr Cogn Disord 2008; 25:74-80. [PMID: 18042993 DOI: 10.1159/000111693] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/17/2007] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE We tested the hypothesis that a higher education level is associated with faster cognitive decline and lower survival in a cohort of 670 Alzheimer's disease patients, followed for 3.5 years at the Lille-Bailleul memory centre. METHODS The patients were categorized in 3 groups according to educational levels: low (<or=8 years), intermediate (9-12 years) and high (>12 years). Cognitive function was measured with the Mini Mental State Examination (MMSE) and the Mattis Dementia Rating Scale (DRS). Survival was analyzed with a Cox model. Analyses were adjusted for age, sex, cholinesterase inhibitor treatment, diabetes, hypertension, visible vascular lesions on MRI, baseline DRS and MMSE. RESULTS The adjusted mixed random model showed that MMSE declined faster for patients with high and intermediate educational levels compared with those with a low educational level (p < 0.0001). The mean annually adjusted DRS decline was highest for the groups with the most education (p = 0.05). The mortality risk was not higher in the better-educated groups (high vs. low: RR = 0.84; 95% CI = 0.35-1.99, intermediate vs. low: RR = 0.82; 95% CI = 0.41-1.63). CONCLUSION In our cohort, highly educated patients had a faster cognitive decline than less educated patients but similar mortality rates. Our findings support the cognitive reserve hypothesis.
Collapse
Affiliation(s)
- A Bruandet
- INSERM, U744, Institut Pasteur de Lille, Université de Lille 2, Lille, France
| | | | | | | | | | | | | |
Collapse
|
29
|
Dhaenens CM, Schraen-Maschke S, Tran H, Vingtdeux V, Ghanem D, Leroy O, Delplanque J, Vanbrussel E, Delacourte A, Vermersch P, Maurage CA, Gruffat H, Sergeant A, Mahadevan MS, Ishiura S, Buée L, Cooper TA, Caillet-Boudin ML, Charlet-Berguerand N, Sablonnière B, Sergeant N. Overexpression of MBNL1 fetal isoforms and modified splicing of Tau in the DM1 brain: two individual consequences of CUG trinucleotide repeats. Exp Neurol 2007; 210:467-78. [PMID: 18177861 DOI: 10.1016/j.expneurol.2007.11.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Revised: 11/15/2007] [Accepted: 11/16/2007] [Indexed: 10/22/2022]
Abstract
Neurofibrillary degeneration is often observed in the brain of patients with type 1 myotonic dystrophy (DM1). It consists principally of the aggregation of Tau isoforms that lack exon 2/3 encoded sequences, and is the consequence of the modified splicing of Tau pre-mRNA. In experimental models of DM1, the splicing of several transcripts is modified due to the loss of Muscleblind-like 1 (MBNL1) function. In the present study, we demonstrate that the MBNL1 protein is also present in the human brain, and consists of several isoforms, as shown by RT-PCR and sequencing. In comparison with controls, we show that the adult DM1 brain exhibits modifications in the splicing of MBNL1, with the preferential expression of long MBNL1 isoforms--a splicing pattern similar to that seen in the fetal human brain. In cultured HeLa cells, the presence of long CUG repeats, such as those found in the DM1 mutation, leads to similar changes in the splicing pattern of MBNL1, and the localization of MBNL1 in nuclear RNA foci. Long CUG repeats also reproduce the repression of Tau exon 2/3 inclusion, as in the human disease, suggesting that their effect on MBNL1 expression may lead to changes in Tau splicing. However, while an overall reduction in the expression of MBNL1 mimics the effect of the DM1 mutation, none of the MBNL1 isoforms tested so far modulates the endogenous splicing of Tau. The modified splicing of Tau thus results from a possibly CUG-mediated loss of function of MBNL1, but not from changes in the MBNL1 expression pattern.
Collapse
Affiliation(s)
- C M Dhaenens
- Inserm, U837, place de Verdun, 59045 Lille, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Bourteel H, Stojkovic T, Cuisset JM, Maurage CA, Laforet P, Richard P, Vermersch P. [Phenotypic aspects of FKRP-linked muscular dystrophy type 2I in a series of eleven patients]. Rev Neurol (Paris) 2007; 163:189-96. [PMID: 17351538 DOI: 10.1016/s0035-3787(07)90390-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
INTRODUCTION Limb-girdle muscular dystrophy type 2I (LGMD2I) is caused by mutations in the fukutin related protein gene (FKRP gene). This study tries to evaluate clinical, biological and mutational characteristics of LGMD2I. PATIENTS AND METHODS Eleven patients belonging to 9 families from the North of France were selected. We reported demographic data, and results of muscular testing, cardiac, and respiratory examination, as well as the histopathological features of muscle tissue and a genetic analysis of FKRP gene for each patient. RESULTS There were 6 females and 5 males. Mean age at onset was 9.7 years old. Six had Duchenne like phenotype, 5 Becker like phenotype. Nine patients suffered from restrictive respiratory failure, two males had severe dilated cardiomyopathy. Ten patients had the common L276I mutation. Three mutations had not been previously identified: L322V, L489R and R275G heterozygous mutations associated with the L276I mutation. CONCLUSION This study underlines inter and intra familial phenotypic variability in LGMD2I, preponderance of cardiomyopathy in males and restrictive respiratory insufficiency in female.
Collapse
Affiliation(s)
- H Bourteel
- Service de Neurologie inflammatoire et infectieuse, Hôpital Roger Salengro, CHRU Lille.
| | | | | | | | | | | | | |
Collapse
|
31
|
Auvin S, Devisme L, Maurage CA, Soto-Ares G, Cuisset JM, Leclerc F, Vallée L. Neuropathological and MRI findings in an acute presentation of hemiconvulsion-hemiplegia: a report with pathophysiological implications. Seizure 2007; 16:371-6. [PMID: 17350294 DOI: 10.1016/j.seizure.2007.01.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [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: 12/19/2005] [Revised: 11/19/2006] [Accepted: 01/22/2007] [Indexed: 11/17/2022] Open
Abstract
UNLABELLED The mechanisms underlying the hemiconvulsion-hemiplegia-epilepsy syndrome (HHE) remain unclear. The current proposed pathogenic mechanism is a neuronal injury induced by venous thrombosis and/or hypoxia. Previous abnormalities of the brain were suggested as underlying mechanism. MATERIALS AND METHODS We report a patient who presented acutely with hemiconvulsion-hemiplegia (HH) syndrome, but unfortunately died. We discuss the possible pathophysiology of the HH syndrome and possible therapeutic implications utilizing the data from neuroimaging and pathological studies. Post-mortem examination was performed including immunohistochemistry and electron microscopy of the brain tissue. RESULTS The abnormalities in diffusion-weighted imaging indicate cytotoxic edema of the epileptic hemisphere. The pathological studies confirmed a right homogenous hemispheric edema without evidence of any malformation, inflammatory, infectious or metabolic disease. We found axonal damages in the right thalamus confirmed by anti-neurofilament staining. DISCUSSION The pathological studies suggest that cytotoxic edema is responsible for neuronal damage. In HH syndrome, two mechanisms playing a role in the development of a later epilepsy could suggest delayed cell death induced by cytotoxic edema and/or thalamic dysfunction causing a disruption of thalamo-cortical circuit. In acute presentation, the use of anti-edema therapy should be discussed to prevent the cell injury.
Collapse
Affiliation(s)
- Stéphane Auvin
- Department of Pediatric Neurology, University Hospital, Lille, France.
| | | | | | | | | | | | | |
Collapse
|
32
|
Cuisset JM, Maurage CA, Pellissier JF, Barois A, Urtizberea JA, Laing N, Tajsharghi H, Vallée L. 'Cap myopathy': case report of a family. Neuromuscul Disord 2006; 16:277-81. [PMID: 16531045 DOI: 10.1016/j.nmd.2006.01.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [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: 04/22/2005] [Revised: 01/17/2006] [Accepted: 01/31/2006] [Indexed: 11/21/2022]
Abstract
We report the observation of an 18-year-old girl, whose clinical presentation was very suggestive of a congenital myopathy with neonatal onset. A congenital myopathy had been already diagnosed in her brother and in addition her half-cousin died diagnosed with a severe nemaline myopathy at age 4 years. A muscle biopsy performed on both siblings revealed histological and ultrastructural features of 'cap myopathy'. This case report suggests that 'cap myopathy' and some cases of nemaline myopathy with neonatal onset might be two phenotypic expressions of the same genetic disorder. These two entities could therefore, perhaps, be regarded as 'Z-line disorders' possibly caused by defective myofibrillogenesis.
Collapse
Affiliation(s)
- J M Cuisset
- Service de Neuropédiatrie, Centre hospitalier régional universitaire et faculté de médecine, 59037 Lille, France.
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Abstract
Neurofibrillary degeneration (NFD) occurs in the brains of patients with myotonic dystrophy (DM) type 1. The authors report a similar tau pathology in the CNS of a patient with DM2 and compare it to that of patients with DM1. A reduced expression of tau exon 2 and exon 3 epitopes is observed in both DM1 and DM2. This suggests a similar physiopathologic process that may contribute to common neurologic features in patients with DM.
Collapse
Affiliation(s)
- C A Maurage
- INSERM U422, Faculté de Médecine, Lille, France.
| | | | | | | | | | | | | | | |
Collapse
|
34
|
Devos D, Tir M, Maurage CA, Waucquier N, Defebvre L, Defoort-Dhellemmes S, Destée A. ERG and anatomical abnormalities suggesting retinopathy in dementia with Lewy bodies. Neurology 2005; 65:1107-10. [PMID: 16217068 DOI: 10.1212/01.wnl.0000178896.44905.33] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The authors used flash electroretinography to demonstrate dysfunction of the photopic and scotopic retina in patients with dementia with Lewy bodies and visual hallucinations (VHs) compared with patients with Parkinson disease, patients without VHs, and controls. The retinal dysfunction may be related to slight alteration of the photoreceptors and numerous pale inclusions in the outer plexiform layer found at the post mortem examination, suggesting a specific retinopathy.
Collapse
Affiliation(s)
- D Devos
- Service de Neurologie et Pathologie du Mouvement, EA2683, MENRT, Centre Hospitalier Universitaire de Lille, France.
| | | | | | | | | | | | | |
Collapse
|
35
|
Charpentier P, Dauphin A, Stojkovic T, Cotten A, Hurtevent JF, Maurage CA, Thévenon A, Destée A, Defebvre L. [Parkinson's disease, progressive lumbar kyphosis and focal paraspinal myositis]. Rev Neurol (Paris) 2005; 161:459-63. [PMID: 15924083 DOI: 10.1016/s0035-3787(05)85077-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
INTRODUCTION The camptocormia (bent spine) is characterized by a severe forward flexion of the thoracolumbar spine which disappears in the supine position. Clinical case. We describe a typical case observed in a parkinsonian patient. The MRI, electromyogram and biopsy of the paraspinal muscles revealed a typical myositis pattern. DISCUSSION This case, the sixth published to our knowledge, confirms that focal myositis is associated with the camptocormia in Parkinson's disease. Typically it is observed in male subjects, appearing 4 to 6 years after the onset of Parkinson's disease, in fluctuating patients treated by an association of L-Dopa and agonist. It appears quickly and becomes the most important symptom. Antiparkinsonian drugs are useless. CONCLUSION This exceptional picture raises original pathophysiological and therapeutic questions. Systematic studies should be performed in order to detail the pathophysiological link between these 3 entities: Parkinson's disease, focal myositis and camptocormia.
Collapse
Affiliation(s)
- P Charpentier
- Clinique Neurologique, Centre Hospitalier Régional et Universitaire, Lille
| | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Racoussot F, Jourdel D, Labalette P, Maetz B, Maurage CA, Darras J, Lartigau E, Hugues P, Rouland JF. [Nasal fossae hemangiopericytoma revealed by acute dacryocystitis]. J Fr Ophtalmol 2005; 27:1039-42. [PMID: 15557867 DOI: 10.1016/s0181-5512(04)96261-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
We report a 42-year-old woman with a hemangiopericytoma tumor located in nasal fossae, revealed by acute dacryocystitis. Clinical rhinoscopic examination and orbitofacial tomodensitometry showed tumefaction of the lacrimal sac and nasolacrimal duct. We removed the tumor by endonasal surgery. The anatomopathology examination confirmed the diagnosis of hemangiopericytoma. The internal canthus area and the maxillary sinus roof were treated with complementary irradiation.
Collapse
Affiliation(s)
- F Racoussot
- Service d'Ophtalmologie, Hôpital Claude Huriez, Centre Hospitalier Régional Universitaire, 59037 Lille cedex, France
| | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Brénuchon C, Launay D, Maurage CA, Queyrel V, Lambert M, N'Guyen HD, Boutry N, Hachulla E, Hatron PY, Devulder B. Myopathie hypertrophique des membres inférieurs due à des métastases musculaires d'un adénocarcinome à cellules indépendantes de la vessie. Rev Med Interne 2004; 25:839-41. [PMID: 15501357 DOI: 10.1016/j.revmed.2004.07.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2004] [Accepted: 07/12/2004] [Indexed: 11/19/2022]
|
38
|
Vantyghem MC, Pigny P, Maurage CA, Rouaix-Emery N, Stojkovic T, Cuisset JM, Millaire A, Lascols O, Vermersch P, Wemeau JL, Capeau J, Vigouroux C. Patients with familial partial lipodystrophy of the Dunnigan type due to a LMNA R482W mutation show muscular and cardiac abnormalities. J Clin Endocrinol Metab 2004; 89:5337-46. [PMID: 15531479 DOI: 10.1210/jc.2003-031658] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Diseases due to mutations in the lamin A/C gene (LMNA) are highly heterogeneous, including neuromuscular and cardiac dystrophies, lipodystrophies, and premature ageing syndromes. In this study we characterized the neuromuscular and cardiac phenotypes of patients bearing the heterozygous LMNA R482W mutation, which is the most frequent genotype associated with the familial partial lipodystrophy of the Dunnigan type (FPLD). Fourteen patients from two unrelated families, including 10 affected subjects, were studied. The two probands had been referred for lipoatrophy and/or diabetes. Lipodystrophy, exclusively observed in LMNA-mutated patients, was of variable severity and limited to postpubertal subjects. Lipodystrophy and metabolic disturbances were more severe in women, even if an enlarged neck was a constant finding. The severity of hypertriglyceridemia and hirsutism in females was related to that of insulin resistance. Clinical muscular alterations were only present in LMNA-mutated patients. Clinical and histological examination showed an invalidating, progressive limb-girdle muscular dystrophy in a 42-yr-old woman that had been present since childhood, associated with a typical postpubertal FPLD phenotype. Six of eight adults presented the association of calf hypertrophy, perihumeral muscular atrophy, and a rolling gait due to proximal lower limb weakness. Muscular histology was compatible with muscular dystrophy in one of them and/or showed a nonspecific excess of lipid droplets (in three cases). Immunostaining of lamin A/C was normal in the six muscular biopsies. Surprisingly, calpain 3 expression was undetectable in the patient with the severe limb-girdle muscular dystrophy, although the gene did not reveal any molecular alterations. At the cardiac level, cardiac septal hypertrophy and atherosclerosis were frequent in FPLD patients. In addition, a 24-yr-old FPLD patient had a symptomatic second degree atrioventricular block. In conclusion, we showed that most lipodystrophic patients affected by the FPLD-linked LMNA R482W mutation show muscular and cardiac abnormalities. The occurrence and severity of the myopathic and lipoatrophic phenotypes varied and were not related. The muscular phenotype was evocative of limb girdle muscular dystrophy. Cardiac hypertrophy and advanced atherosclerosis were frequent. FPLD patients should receive careful neuromuscular and cardiac examination whatever the underlying LMNA mutation.
Collapse
Affiliation(s)
- M C Vantyghem
- Department of Endocrinology and Metabolism, Lille University Hospital, 6 rue du Prof. Laguesse, 59037 Lille Cedex, France.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Krivosic-Horber R, Dépret T, Wagner JM, Maurage CA. Malignant hyperthermia susceptibility revealed by increased serum creatine kinase concentrations during statin treatment. Eur J Anaesthesiol 2004; 21:572-4. [PMID: 15318472 DOI: 10.1017/s0265021504227120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
40
|
Mouriaux F, Vincent S, Kherrouche Z, Maurage CA, Planque N, Monté D, Labalette P, Saule S. Microphthalmia transcription factor analysis in posterior uveal melanomas. Exp Eye Res 2003; 76:653-61. [PMID: 12742347 DOI: 10.1016/s0014-4835(03)00082-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
PURPOSE The protein encoded by the Microphthalmia gene (MITF) is a transcription factor essential for the development and survival of melanocytes. It serves as a master regulator in modulating extracellular signals. Because of its central role in melanocytes survival and to assess its potential use as a histopathological marker for melanoma, MITF expression was examined in human choroidal melanomas. METHODS Fifty-seven paraffin-embedded sections of choroidal melanoma specimens and 1 choroidal melanoma cell line were analyzed using immunochemistry and RT-PCR. Normal choroids and normal choroidal melanocyte cells were used as control. RESULTS Sixty-five percent of the tumoral specimens stained positively for MITF with a predominant nuclear pattern of reactivity. MITF-M and MITF-A isoforms were detected by RT-PCR in all specimens examined. Using a chimeric protein resulting from the fusion of each Mitf protein with the GFP, Mitf-M exhibited an exclusive nuclear staining whereas Mitf-A exhibited a mixed nuclear and cytoplasmic staining. No correlation between MITF-positivity and parameters such as cell type, largest tumor diameter, sclera invasion, mitotic figures was observed. In contrast, a significant negative association was found between MITF staining and the pigmentation (p=0.02) and a positive correlation between MITF staining and the proliferative marker Ki67 was found (p=0.02). CONCLUSION MITF may be implicated in choroidal melanoma pigmentation and proliferation. Further analysis should provide new insights into the mechanisms underlying the molecular and cellular changes of choroidal melanomas.
Collapse
Affiliation(s)
- Frédéric Mouriaux
- Service d'ophtalmologie, Centre Hopitalier de Lens, Route de La Bassée, Lens 62307, France.
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Vincent S, Mirshari M, Nicolas C, Adenis C, Dhellemmes P, Soto Ares G, Maurage CA, Baranzelli MC, Giangaspero F, Ruchoux MM. Large-cell medulloblastoma with arrestin-like protein expression. Clin Neuropathol 2003; 22:1-9. [PMID: 12617187] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023] Open
Abstract
We report a case of a cerebellar large-cell medulloblastoma in a 12-year-old patient. Despite a gross-total resection followed by a radiation therapy and then a chemotherapy, the death occurred 6 months later. The cyogenetic analysis showed an isochromosome 17q. Immunoreactivity for synaptophysin, neurofilaments, chromogranin and arrestin-like proteins was detected, whereas rhodopsin, vimentin, EMA and PAX-6 were negative. In this study, we demonstrate that large-cell medulloblastoma with translocation in chromosome 17q is a neuronal differentiated medulloblastoma with non-photoreceptor characterization. By reverse transcription and polymerase chain reaction (RT-PCR) method, using primers for beta1, beta2 and visual arrestin, we demonstrate corresponding mRNA for beta1, beta2 arrestin but not for visual arrestin. These results suggest that arrestin immunoreactivity in this tumor corresponds to non-visual arrestin. This case corresponds to a new entity of large-cell medulloblastoma. The potential role of a new marker linked to a beta2 adrenergic receptor needs further molecular characterization to be useful.
Collapse
Affiliation(s)
- S Vincent
- Neuropathology Department, CHRU Lille, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Vincent S, Dhellemmes P, Maurage CA, Soto-Ares G, Hassoun J, Ruchoux MM. Intracerebral medulloepithelioma with a long survival. Clin Neuropathol 2002; 21:197-205. [PMID: 12365722] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023] Open
Abstract
This report concerns a 3-month-old boy where neuroimaging examination showed a large, well-circumscribed, mildly heterogeneous tumor arising in the left ventricle. Pathological findings were compatible with a medulloepithelioma. A survey of published cases of medulloepitheliomas showed this tumor to be highly malignant, possibly displaying the entire range of differentiation from embryonal primitive neuroepithelium to mature cells and usually involving the cerebral hemispheres with a very poor prognosis in this location. On the other hand, medulloepitheliomas occurring in the eye or the orbit generally benefit from a gross-total resection and may present a good prognosis. Curiously, the patient reported here is doing well 7 years after the resection without any postoperative treatment. The exclusive intraventricular location of the tumor and its gross-total resection clearly seems to have contributed to this unusual recovery.
Collapse
Affiliation(s)
- S Vincent
- Neuropathology Department, CHRU Lille, France
| | | | | | | | | | | |
Collapse
|
43
|
Bergoin C, Bure M, Tavernier JY, Lamblin C, Maurage CA, Remy-Jardin M, Wallaert B. [The anti-synthetase syndrome]. Rev Mal Respir 2002; 19:371-4. [PMID: 12161705] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
The anti-synthetase syndrome comprises the association of an inflammatory myopathy (polymyositis, dermatomyositis), interstitial pneumonitis, skin lesions characteristic of "mechanics hands", Raynaud's phenomena, inflammatory polyarthritis and, at the biological level, antinuclear antibodies known as anti-synthetases. We report our observations of two patients, one with a typical anti-synthetase syndrome and one with an incomplete form. Two men aged 49 and 47 presented with increasing dyspnoea upon effort, muscular weakness, arthralgia, bilateral pulmonary crackles and, in the first case, typical hairless skin lesions. In both cases the chest x-rays and CT scans confirmed the presence of interstitial lesions, predominantly in the lower lobes. Lung function tests showed a restrictive pattern with reduced gas transfer. At the biological level both patients presented an inflammatory picture with elevated muscle enzymes and anti-Jo-1 antibodies. Immuno-suppressive treatment with cortico-steroids and cyclophosphamide lead to a symptomatic improvement, regression of the radiological changes and improvement in the measurements of pulmonary function.
Collapse
Affiliation(s)
- C Bergoin
- Clinique des Maladies Respiratoires, Hôpital A. Calmette, CHRU Lille Cedex 59037, France
| | | | | | | | | | | | | |
Collapse
|
44
|
Desmettre T, Maurage CA, Mordon S. [Choroidal heat shock overexpression in transpupillary thermotherapy: preliminary results]. J Fr Ophtalmol 2001; 24:1040-4. [PMID: 11913233] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
PURPOSE To assess retinochoroidal overexpression of heat shock proteins (HSP-70) induced by a transpupillary laser irradiation below the photocoagulation threshold. METHODS Four pigmented rabbits were anesthetized and TTT was performed on the right eye using a 810nm diode laser (Iridis, Quantel-Medical, France) adapted on slit lamp (spot size: 1.3 mm, duration: 60 seconds; power 92-150 mW). Series of laser impacts were aimed at the posterior pole of the retina. Left eyes were used as control. Twenty-four hours after laser irradiation, a histological study was done on chorioretinal layers. Tissue samples were fixed in formalin and embedded in paraffin. A monoclonal antibody was used to detect HSP-70 immunoreactivity (mouse IgGl, SPA-810, Stress Gen, Canada), followed by a biotinylated goat antimouse antibody (Dako, Denmark), revealed by the avidin-biotin complex (Vectastain kit, Vector, USA) and the AEC chromogen. Retinal structures were further identified by HES coloration. RESULTS The photocoagulation threshold was obtained for laser power at 150 mW. Under this threshold, HSP-70 immunostaining was the strongest for power 127 mW with a staining of some choroidal cells, including capillary endothelial cells. No HSP-70 immunoreactivity was observed on the retina. For the laser power 107 mW, HSP-70 reactivity was observed only in occasional choroidal cells. For the laser power 92 mW, as for nonirradiated eyes, no HSP-70 immunoreactivity was detected. CONCLUSIONS Transpupillary 810 nm laser irradiation under the photocoagulation threshold induces choroidal HSP overexpression. This study concludes that choroidal HSP overexpression can be induced during TTT.
Collapse
Affiliation(s)
- T Desmettre
- UPRES EA 2689 INSERM IFR22, Pavillon Vancostenobel, CHU Lille, 59037 Lille.
| | | | | |
Collapse
|
45
|
Desmettre T, Maurage CA, Mordon S. Heat shock protein hyperexpression on chorioretinal layers after transpupillary thermotherapy. Invest Ophthalmol Vis Sci 2001; 42:2976-80. [PMID: 11687545] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
PURPOSE To assess a biological effect induced by temperature elevation during transpupillary thermotherapy (TTT). METHODS Six pigmented rabbits were anesthetized, and TTT was performed on the right eye using an 810-nm diode laser installed on a slit lamp (spot size, 1.3 mm; duration, 60 seconds; power, 92-150 mW). A series of laser pulses were aimed at the posterior pole of the retina. The left eyes were used as the control. Twenty-four hours after laser irradiation, a histologic study was performed on the chorioretinal layers. Tissue samples were fixed in formalin and embedded in paraffin. A monoclonal antibody was used to detect heat shock protein (Hsp)70 immunoreactivity, followed by a biotinylated goat anti-mouse antibody, revealed by the avidin-biotin complex and the 3-amino-9-ethyl-carbazole (AEC) chromogen. Retinal structures were further identified by hematoxylin erythrosin saffron (HES) coloration. RESULTS The photocoagulation threshold was found to be at the 150-mW laser power. Under this threshold, Hsp70 immunostaining was the strongest at the 127-mW power, with staining of some choroidal cells, including capillary endothelial cells. No Hsp70 immunoreactivity was observed on the retina. At the 107-mW power, Hsp70 reactivity was observed only in occasional choroidal cells. At the 98-mW power, only mild, diffuse Hsp70 immunoreactivity was observed in the choroid. At the 92-mW power, as in nonirradiated eyes, no Hsp70 immunoreactivity was detected. CONCLUSIONS Subthreshold transpupillary 810-nm laser irradiation induces choroidal Hsp hyperexpression. This confirms that choroidal Hsp hyperexpression can be induced during TTT, as has been recently hypothesized by several investigators.
Collapse
Affiliation(s)
- T Desmettre
- Unité Propre de Recherche de l'Enseignement Superieur (UPRES) EA2689, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire (CHU), Lille, France.
| | | | | |
Collapse
|
46
|
Abstract
The microtubule-associated tau proteins are abnormally aggregated in many tauopathies. Phosphorylation modulates the functions of tau. The serine 199 residue of tau is abnormally phosphorylated at early and late stages of Alzheimer's disease. The presence of the phosphorylated Ser199 was investigated in autopsy-derived and biopsy-derived brain tissue samples from non-demented individuals. A paradoxical expression was found in the hippocampus of the youngest ones, in granule cells of the dentate gyrus and in pyramidal cells of the Ammon's horn, which are particularly prone to neurodegeneration in several tauopathies. The rate of positive cells decreased with age. These data emphasize the importance of the phosphorylation of the Ser199 residue of tau in ageing and susceptibility to neurodegeneration.
Collapse
Affiliation(s)
- C A Maurage
- INSERM U422, 1 Place de Verdun, 59045 Lille, France
| | | | | | | | | |
Collapse
|
47
|
Zephir H, Stojkovic T, Maurage CA, Hurtevent JF, Vermersch P. [Tubular aggregate congenital myopathy associated with neuromuscular block]. Rev Neurol (Paris) 2001; 157:1293-6. [PMID: 11885525] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Various myopathies are described associated with tubular aggregates. However, in several cases tubular aggregates constitute the main structural feature allowing to consider myopathy with tubular aggregates as a distinct entity. A 50-year-old woman whose parents were consanguinous, presented frequent falls. She walked only after 18 months of age and did poorly in gymnastics. The weakness, which has myasthenic feature, involved predominantly the pelvis girdle. The serum creatine kinase was 206 UI/L (normal < 110 UI/L). Electromyogram showed a myogenic pattern in proximal muscles. Repetitive stimulation on the trapezius revealed 50 p. cent decrementing response. Muscle biopsy showed numerous tubular aggregates in type II fibers. Anti-acetylcholine receptor (AChR) antibodies were absent. There was no thymoma. The neostigmine test was negative. Clinical and electrical myasthenic features characterize one of the numerous forms of myopathy with tubular aggregates. In our case, the lack of AChR antibodies and the negative response to neostigmine argue in favor of a dysfunction of the AChR. This unusual observation highlights the therapeutic difficulties in this myopathy with neuromuscular block.
Collapse
MESH Headings
- Biopsy
- Consanguinity
- Electromyography
- Female
- Humans
- Microscopy, Electron
- Middle Aged
- Muscle, Skeletal/pathology
- Myasthenic Syndromes, Congenital/diagnosis
- Myasthenic Syndromes, Congenital/genetics
- Myasthenic Syndromes, Congenital/pathology
- Myopathies, Structural, Congenital/diagnosis
- Myopathies, Structural, Congenital/genetics
- Myopathies, Structural, Congenital/pathology
Collapse
Affiliation(s)
- H Zephir
- Services de Neurologie, Hôpital Roger Salengro, CHRU de Lille, 59037 Lille
| | | | | | | | | |
Collapse
|
48
|
Sergeant N, Sablonnière B, Schraen-Maschke S, Ghestem A, Maurage CA, Wattez A, Vermersch P, Delacourte A. Dysregulation of human brain microtubule-associated tau mRNA maturation in myotonic dystrophy type 1. Hum Mol Genet 2001; 10:2143-55. [PMID: 11590131 DOI: 10.1093/hmg/10.19.2143] [Citation(s) in RCA: 206] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Intraneuronal aggregates of hyperphosphorylated tau proteins, referred to as pathological tau, are found in brain areas of demented patients affected by numerous different neurodegenerative disorders. We previously described a particular biochemical profile of pathological tau proteins in myotonic dystrophy type 1 (DM1). This multisystemic disorder is characterized by an unstable CTG repeat expansion in the 3'-untranslated region of the DM protein kinase gene. In the human central nervous system, tau proteins consist of six isoforms that differ by the presence or absence of the alternatively spliced exons 2, 3 and 10. Here we show that the pattern of tau isoforms aggregated in DM1 brain lesions is characteristic. It consists mainly of the aggregation of the shortest human tau isoform. A disruption in normal tau isoform expression consisting of a reduced expression of tau isoforms containing the exon 2 was observed at both the mRNA and protein levels. Large expanded CTG repeats were detected and showed marked somatic heterogeneity between DM1 cases and in cortical brains regions analysed. Our data suggest a relationship between the CTG repeat expansion and the alteration of tau expression showing that DM1 is a peculiar tauopathy.
Collapse
Affiliation(s)
- N Sergeant
- INSERM U422, Groupe VCDN, 1 place de Verdun, 59045 Lille Cedex, France
| | | | | | | | | | | | | | | |
Collapse
|
49
|
Stojkovic T, Maurage CA, Moerman A, Hurtevent JF, Krivosic-Horber R, Pellissier JF, Vermersch P. Congenital myopathy with central cores and fingerprint bodies in association with malignant hyperthermia susceptibility. Neuromuscul Disord 2001; 11:538-41. [PMID: 11525882 DOI: 10.1016/s0960-8966(01)00196-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A 26-year-old man had proximal weakness in the shoulder and the pelvic girdle since infancy. His sister, aged 16 years, presented a similar phenotype with more pronounced pelvic weakness. His muscle biopsy showed dense non-reducing inclusions which had a lamellar pattern at the ultrastructural level. These structures showed the typical features of fingerprint inclusions which were widely distributed in the fibers. Several central cores and other structural changes such as Z-line streaming were also observed. In view of the central cores, the male patient was investigated for malignant hyperthermia susceptibility. After exposure to halothane or caffeine, unusual intense contractures were observed on fiber preparations. The coexistence of central cores associated with fingerprint inclusions is suggestive of mixed congenital myopathy, which is in our case associated with malignant hyperthermia susceptibility.
Collapse
Affiliation(s)
- T Stojkovic
- Department of Neurology, Hôpital Roger Salengro, 59037 Lille Cedex, France.
| | | | | | | | | | | | | |
Collapse
|
50
|
Abstract
The tyrosine kinase receptor c-kit and its ligand stem cell factor exert a broad range of biological activities during organogenesis. It also improves normal cell development including complex biological responses involved in the differentiation and proliferation of the melanocytes. Diffuse uveal melanocytic proliferation is a rare paraneoplasic syndrome, resulting in rapid bilateral visual loss due to proliferation of melanocytes within the choroid. We have therefore investigated whether the c-kit/stem cell factor pathway regulates the proliferation of choroidal melanocytes and also if such pathway plays a role in bilateral uveal melanocytic proliferation. Normal cultured melanocytes of the choroid and paraffin-embedded sections of melanocytic proliferation were studied. C-kit expression and effects of stem cell factor were measured. Western blot assays of cell extracts demonstrated that c-kit was expressed in choroidal melanocytes. Immunocytochemical analysis on cultured melanocytes showed a cytoplasmic distribution. Immunohistochemical analysis on melanocytic proliferation showed a strong cytoplasmic distribution in the pigmented spindle-shaped melanocytes localized in the multiple focal areas of choroidal thickening. The addition of stem cell factor did not change melanocyte morphologies and was mitogenic in the presence of bFGF, isobutyl-1-methylxanthine and cholera toxin. In contrast, stem cell factor was not able to produce any significant melanin. Activation of c-kit by its ligand may contribute to the proliferation of choroidal melanocytes.
Collapse
Affiliation(s)
- F Mouriaux
- Division of Ophthalmology, Huriez Hospital, CHRU 59037 Lille, France.
| | | | | | | | | |
Collapse
|