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El Massry M, Msheik Z, El Masri T, Ntoutoume GMAN, Vignaud L, Richard L, Pinault E, Faye PA, Bregier F, Marquet P, Favreau F, Vallat JM, Billet F, Sol V, Sturtz F, Desmouliere A. Improvement of Charcot-Marie-Tooth Phenotype with a Nanocomplex Treatment in Two Transgenic Models of CMT1A. Biomater Res 2024; 28:0009. [PMID: 38560579 PMCID: PMC10981932 DOI: 10.34133/bmr.0009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 01/14/2024] [Indexed: 04/04/2024] Open
Abstract
Curcumin has been shown to exert beneficial effects in peripheral neuropathies. Despite its known biological activities, curcumin has unfavorable pharmacokinetics. Its instability has been linked to its failure in clinical trials of curcumin for the treatment of human pathologies. For this reason, we developed curcumin-loaded cyclodextrin/cellulose nanocrystals (NanoCur) to improve its pharmacokinetics. The present study aims to assess the potency of a low dose of NanoCur in 2 Charcot-Marie-Tooth disease type 1A (CMT1A) rodent models at different stages of the disease. The efficiency of NanoCur is also compared to that of Theracurmin (Thera), a commercially available curcumin formulation. The toxicity of a short-term and chronic exposure to the treatment is investigated both in vitro and in vivo, respectively. Furthermore, the entry route, the mechanism of action and the effect on the nerve phenotype are dissected in this study. Overall, the data support an improvement in sensorimotor functions, associated with amelioration in peripheral myelination in NanoCur-treated animals; an effect that was not evident in the Thera-treated group. That was combined with a high margin of safety both in vivo and in vitro. Furthermore, NanoCur appears to inhibit inflammatory pathways that normally include macrophage recruitment to the diseased nerve. This study shows that NanoCur shows therapeutic benefits with minimal systemic toxicity, suggesting that it is a potential therapeutic candidate for CMT1A and, possibly, for other neuropathies.
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Affiliation(s)
- Mohamed El Massry
- NeurIT UR20218, Faculty of Medicine and Pharmacy,
University of Limoges, Limoges, France
| | - Zeina Msheik
- NeurIT UR20218, Faculty of Medicine and Pharmacy,
University of Limoges, Limoges, France
| | - Tarek El Masri
- NeurIT UR20218, Faculty of Medicine and Pharmacy,
University of Limoges, Limoges, France
- Department of Anatomy, Cell Biology & Physiological Sciences, Faculty of Medicine,
American University of Beirut, Beirut, Lebanon
| | | | - Laetitia Vignaud
- NeurIT UR20218, Faculty of Medicine and Pharmacy,
University of Limoges, Limoges, France
| | - Laurence Richard
- NeurIT UR20218, Faculty of Medicine and Pharmacy,
University of Limoges, Limoges, France
- Reference Center for Rare Peripheral Neuropathies, Department of Neurology,
University Hospital of Limoges, Limoges, France
| | - Emilie Pinault
- BISCEm (Biologie Intégrative Santé Chimie Environnement) Platform, US 42 Inserm/UAR 2015 CNRS,
University of Limoges, Limoges, France
| | - Pierre-Antoine Faye
- NeurIT UR20218, Faculty of Medicine and Pharmacy,
University of Limoges, Limoges, France
- Department of Biochemistry,
University Hospital of Limoges, Limoges, France
| | | | - Pierre Marquet
- INSERM U1248 Pharmacology & Transplantation, CBRS, Faculty of Medicine and Pharmacy,
University of Limoges, Limoges, France
- Department of Pharmacology and Toxicology,
CHU Limoges, Limoges, France
| | - Frédéric Favreau
- NeurIT UR20218, Faculty of Medicine and Pharmacy,
University of Limoges, Limoges, France
- Department of Biochemistry,
University Hospital of Limoges, Limoges, France
| | - Jean-Michel Vallat
- Reference Center for Rare Peripheral Neuropathies, Department of Neurology,
University Hospital of Limoges, Limoges, France
| | - Fabrice Billet
- NeurIT UR20218, Faculty of Medicine and Pharmacy,
University of Limoges, Limoges, France
| | - Vincent Sol
- LABCiS UR22722,
University of Limoges, F-87000 Limoges, France
| | - Franck Sturtz
- NeurIT UR20218, Faculty of Medicine and Pharmacy,
University of Limoges, Limoges, France
- Department of Biochemistry,
University Hospital of Limoges, Limoges, France
| | - Alexis Desmouliere
- NeurIT UR20218, Faculty of Medicine and Pharmacy,
University of Limoges, Limoges, France
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Bouvier D, Cantais A, Laspougeas A, Lorton F, Plenier Y, Cottier M, Fournier P, Tran A, Moreau E, Durif J, Sarret C, Mourgues C, Sturtz F, Oudart JB, Raffort J, Gonzalo P, Cristol JP, Masson D, Pereira B, Sapin V. Serum S100B Level in the Management of Pediatric Minor Head Trauma: A Randomized Clinical Trial. JAMA Netw Open 2024; 7:e242366. [PMID: 38502126 PMCID: PMC10951739 DOI: 10.1001/jamanetworkopen.2024.2366] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 01/23/2024] [Indexed: 03/20/2024] Open
Abstract
Importance Minor head trauma (HT) is one of the most common causes of hospitalization in children. A diagnostic test could prevent unnecessary hospitalizations and cranial computed tomographic (CCT) scans. Objective To evaluate the effectiveness of serum S100B values in reducing exposure to CCT scans and in-hospital observation in children with minor HT. Design, Setting, and Participants This multicenter, unblinded, prospective, interventional randomized clinical trial used a stepped-wedge cluster design to compare S100B biomonitoring and control groups at 11 centers in France. Participants included children and adolescents 16 years or younger (hereinafter referred to as children) admitted to the emergency department with minor HT. The enrollment period was November 1, 2016, to October 31, 2021, with a follow-up period of 1 month for each patient. Data were analyzed from March 7 to May 29, 2023, based on the modified intention-to-treat and per protocol populations. Interventions Children in the control group had CCT scans or were hospitalized according to current recommendations. In the S100B biomonitoring group, blood sampling took place within 3 hours after minor HT, and management depended on serum S100B protein levels. If the S100B level was within the reference range according to age, the children were discharged from the emergency department. Otherwise, children were treated as in the control group. Main Outcomes and Measures Proportion of CCT scans performed (absence or presence of CCT scan for each patient) in the 48 hours following minor HT. Results A total of 2078 children were included: 926 in the control group and 1152 in the S100B biomonitoring group (1235 [59.4%] boys; median age, 3.2 [IQR, 1.0-8.5] years). Cranial CT scans were performed in 299 children (32.3%) in the control group and 112 (9.7%) in the S100B biomonitoring group. This difference of 23% (95% CI, 19%-26%) was not statistically significant (P = .44) due to an intraclass correlation coefficient of 0.32. A statistically significant 50% reduction in hospitalizations (95% CI, 47%-53%) was observed in the S100B biomonitoring group (479 [41.6%] vs 849 [91.7%]; P < .001). Conclusions and Relevance In this randomized clinical trial of effectiveness of the serum S100B level in the management of pediatric minor HT, S100B biomonitoring yielded a reduction in the number of CCT scans and in-hospital observation when measured in accordance with the conditions defined by a clinical decision algorithm. Trial Registration ClinicalTrials.gov Identifier: NCT02819778.
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Affiliation(s)
- Damien Bouvier
- Department of Biochemistry and Molecular Genetics, Centre Hospitalier Universitaire (CHU) Clermont-Ferrand, Université Clermont Auvergne, Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), Génétique, Reproduction et Développement, Clermont-Ferrand, France
| | - Aymeric Cantais
- Department of Pediatrics, CHU Saint-Etienne, Saint-Etienne, France
| | | | - Fleur Lorton
- Pediatric Emergency Department, Nantes Université, CHU Nantes, INSERM, Centre d’Investigation Clinique 1413, Nantes, France
| | | | - Maria Cottier
- Department of Pediatrics, CHU Montpellier, Montpellier, France
| | | | - Antoine Tran
- Department of Pediatrics, CHU Nice, Nice, France
| | - Emilie Moreau
- Department of Pediatrics, Assistance Publique–Hôpitaux de Marseille, Marseille, France
| | - Julie Durif
- Department of Biochemistry and Molecular Genetics, CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Catherine Sarret
- Department of Pediatrics, CHU Clermont-Ferrand, Université Clermont Auvergne, CNRS, SIGMA, Thérapies Guidées par l’Image, Clermont-Ferrand, France
| | - Charline Mourgues
- Biostatistics Unit (Délégation à la Recherche Clinique et à l’Innovation), CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Franck Sturtz
- Department of Biochemistry, CHU Limoges, Limoges, France
| | - Jean-Baptiste Oudart
- Faculté de Médecine, Université de Reims Champagne-Ardenne, Matrice Extracellulaire et Dynamique Cellulaire Unit, UMR CNRS 7369, Reims, France
| | | | - Philippe Gonzalo
- Department of Biochemistry and Pharmacology, CHU Saint-Etienne, Saint-Etienne, France
| | | | - Damien Masson
- Department of Biochemistry, CHU Nantes, Nantes, France
| | - Bruno Pereira
- Biostatistics Unit (Délégation à la Recherche Clinique et à l’Innovation), CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Vincent Sapin
- Department of Biochemistry and Molecular Genetics, Centre Hospitalier Universitaire (CHU) Clermont-Ferrand, Université Clermont Auvergne, Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), Génétique, Reproduction et Développement, Clermont-Ferrand, France
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Bernard A, Mroué M, Bourthoumieu S, Boyce M, Richard L, Sturtz F, Demiot C, Danigo A. Netazepide, an Antagonist of Cholecystokinin Type 2 Receptor, Prevents Vincristine-Induced Sensory Neuropathy in Mice. Pharmaceuticals (Basel) 2024; 17:144. [PMID: 38399359 PMCID: PMC10892341 DOI: 10.3390/ph17020144] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/12/2024] [Accepted: 01/19/2024] [Indexed: 02/25/2024] Open
Abstract
Among the vinca-alkaloid class, vincristine is a potent chemotherapeutic agent with significant neurotoxic effects and is employed to address a wide spectrum of cancer types. Recently, the therapeutic potential of the cholecystokinin type 2 receptor (CCK2R) as a target for vincristine-induced peripheral neuropathy (VIPN) was demonstrated. In this study, the impact of preventive CCK2R blockade using netazepide (Trio Medicines Ltd., London, UK) was investigated in a mouse model of vincristine-induced peripheral neuropathy. Netazepide is a highly selective CCK2R antagonist under development for the treatment of patients with gastric neuroendocrine tumors caused by hypergastrinemia secondary to chronic autoimmune atrophic gastritis. Vincristine-induced peripheral neuropathy was induced by intraperitoneal injections of vincristine at 100 µg/kg/d for 7 days (D0 to D7). Netazepide (2 mg/kg/d or 5 mg/kg/d, per os) was administered one day before vincristine treatment until D7. Vincristine induced a high tactile allodynia from D1 to D7. VIPN was characterized by dorsal root ganglion neuron (DRG) and intraepidermal nerve fiber (IENF) loss, and enlargement and loss of myelinated axons in the sciatic nerve. Netazepide completely prevented the painful symptoms and nerve injuries induced by vincristine. In conclusion, the fact that netazepide protected against vincristine-induced peripheral neuropathy in a mouse model strongly supports the assessment of its therapeutic potential in patients receiving such chemotherapy.
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Affiliation(s)
- Amandine Bernard
- NeurIT Neuropathies et Innovations Thérapeutiques UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.B.); (M.M.); (S.B.); (L.R.); (F.S.); (C.D.)
| | - Mohamad Mroué
- NeurIT Neuropathies et Innovations Thérapeutiques UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.B.); (M.M.); (S.B.); (L.R.); (F.S.); (C.D.)
| | - Sylvie Bourthoumieu
- NeurIT Neuropathies et Innovations Thérapeutiques UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.B.); (M.M.); (S.B.); (L.R.); (F.S.); (C.D.)
- Department of Cytogenetic, Medical Genetic and Reproduction Biology, University Hospital of Limoges, 87042 Limoges, France
| | - Malcolm Boyce
- Hammersmith Medicines Research Limited and Trio Medicines Limited, 44 Cumberland Avenue, London NW10 7EW, UK;
| | - Laurence Richard
- NeurIT Neuropathies et Innovations Thérapeutiques UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.B.); (M.M.); (S.B.); (L.R.); (F.S.); (C.D.)
- Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, 87042 Limoges, France
| | - Franck Sturtz
- NeurIT Neuropathies et Innovations Thérapeutiques UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.B.); (M.M.); (S.B.); (L.R.); (F.S.); (C.D.)
- Department of Biochemistry and Molecular Genetics, University Hospital of Limoges, 87042 Limoges, France
| | - Claire Demiot
- NeurIT Neuropathies et Innovations Thérapeutiques UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.B.); (M.M.); (S.B.); (L.R.); (F.S.); (C.D.)
- Transversal and Territorial Therapeutic Education Unit (UTTEP87), University Hospital of Limoges, 87042 Limoges, France
| | - Aurore Danigo
- NeurIT Neuropathies et Innovations Thérapeutiques UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.B.); (M.M.); (S.B.); (L.R.); (F.S.); (C.D.)
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Mroué M, Bessaguet F, Nizou A, Richard L, Sturtz F, Magy L, Bourthoumieu S, Danigo A, Demiot C. Neuroprotective Effect of Polyvalent Immunoglobulins on Mouse Models of Chemotherapy-Induced Peripheral Neuropathy. Pharmaceutics 2024; 16:139. [PMID: 38276509 PMCID: PMC10818580 DOI: 10.3390/pharmaceutics16010139] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/11/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024] Open
Abstract
The occurrence of neuropathic pain in chemotherapy-induced peripheral neuropathy (CIPN) is a major dose-limiting effect of many commonly-used anticancer agents. Polyvalent human immunoglobulins (hIg), used in the treatment of several peripheral neuropathies, may alleviate neuropathic pain. The aim of this project was to investigate the preventive effect of hIg in two mouse models of CIPN, induced by vincristine (VCR, 100 µg/kg/d) and oxaliplatin (OXP, 6 mg/kg/3d). Human Ig were administered one day before the first injection of chemotherapy. The onset of CIPN and effects of hIg were assessed via functional tests and morphological analyses of sensory nerves. To evaluate the effect of hIg on chemotherapy cytotoxicity, viability assays were performed using hIg (0 to 12 mg/mL) combined with anticancer agents on human cancer cell lines. The preventive treatment with hIg alleviated tactile hypersensitivity and nerve injuries induced by VCR. It also alleviated tactile/cold hypersensitivities and nerve injuries induced by OXP. Treatment with hIg did not affect the cytotoxicity of either chemotherapy. Furthermore, in combination with VCR, hIg potentiated chemo-induced cell death. In conclusion, hIg is a promising therapy to prevent the onset of CIPN and potentiate chemotherapy effect on cancer, reinforcing the interest in hIg in the management of CIPN.
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Affiliation(s)
- Mohamad Mroué
- UR 20218—NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (M.M.); (A.N.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
| | - Flavien Bessaguet
- UMR INSERM 1083 CNRS 6015 MITOVASC Laboratory, CarMe Team, University of Angers, 49045 Angers, France;
| | - Angélique Nizou
- UR 20218—NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (M.M.); (A.N.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
| | - Laurence Richard
- UR 20218—NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (M.M.); (A.N.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
- Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, 87042 Limoges, France
- Department of Pathology, University Hospital of Limoges, 87042 Limoges, France
| | - Franck Sturtz
- UR 20218—NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (M.M.); (A.N.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
- Department of Biochemistry and Molecular Genetics, University Hospital of Limoges, 87042 Limoges, France
| | - Laurent Magy
- UR 20218—NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (M.M.); (A.N.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
- Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, 87042 Limoges, France
| | - Sylvie Bourthoumieu
- UR 20218—NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (M.M.); (A.N.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
- Department of Cytogenetic, Medical Genetic and Reproductive Biology, University Hospital of Limoges, 87042 Limoges, France
| | - Aurore Danigo
- UR 20218—NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (M.M.); (A.N.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
| | - Claire Demiot
- UR 20218—NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (M.M.); (A.N.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
- Transversal and Territorial Therapeutic Education Unit (UTTEP87), University Hospital of Limoges, 87042 Limoges, France
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Frachet S, Danigo A, Duchesne M, Richard L, Sturtz F, Magy L, Demiot C. A mouse model of sensory neuropathy induced by a long course of monomethyl-auristatin E treatment. Toxicol Appl Pharmacol 2023; 474:116624. [PMID: 37419214 DOI: 10.1016/j.taap.2023.116624] [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: 01/10/2023] [Revised: 06/16/2023] [Accepted: 07/03/2023] [Indexed: 07/09/2023]
Abstract
Antibody-drug conjugates (ADCs) are anticancer drugs consisting of a monoclonal antibody, targeting selective tumor antigens, to which has been frequently associated a highly potent cytotoxic agent, the monomethyl auristatin E (MMAE) using a chemical linker. MMAE is a tubulin polymerization inhibitor derived from dolastin-10. These MMAE-ADCs are responsible for peripheral nerve toxicities. Our objective was to develop and characterize a mouse model of MMAE-induced peripheral neuropathy induced by free MMAE injections. MMAE was injected in Swiss mice at 50 μg/kg i.p. every other day for 7 weeks. Assessments of motor and sensory nerve functions were performed once a week on MMAE and Vehicle-treated mice. Sciatic nerve and paw skin were removed at the end of experiment for subsequent immunofluorescence and morphological analysis. MMAE did not affect motor coordination, muscular strength and heat nociception, but significantly induced tactile allodynia in MMAE-treated mice compared with Vehicle-treated mice from day 35 to day 49. MMAE significantly reduced myelinated and unmyelinated axon densities in sciatic nerves and led to a loss of intraepidermal nerve fiber in paw skin. In summary, long course of low dose of MMAE induced a peripheral sensory neuropathy associated with nerve degeneration, without general state alteration. This model may represent a ready accessible tool to screen neuroprotective strategies in the context of peripheral neuropathies induced by MMAE-ADCs.
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Affiliation(s)
- Simon Frachet
- NeurIT (Neuropathies et Innovations Thérapeutiques) UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, Limoges 87025, France; Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, Limoges 87042, France.
| | - Aurore Danigo
- NeurIT (Neuropathies et Innovations Thérapeutiques) UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, Limoges 87025, France.
| | - Mathilde Duchesne
- NeurIT (Neuropathies et Innovations Thérapeutiques) UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, Limoges 87025, France; Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, Limoges 87042, France; Department of Pathology, University Hospital of Limoges, Limoges 87042, France.
| | - Laurence Richard
- NeurIT (Neuropathies et Innovations Thérapeutiques) UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, Limoges 87025, France; Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, Limoges 87042, France; Department of Pathology, University Hospital of Limoges, Limoges 87042, France.
| | - Franck Sturtz
- NeurIT (Neuropathies et Innovations Thérapeutiques) UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, Limoges 87025, France.
| | - Laurent Magy
- NeurIT (Neuropathies et Innovations Thérapeutiques) UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, Limoges 87025, France; Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, Limoges 87042, France.
| | - Claire Demiot
- NeurIT (Neuropathies et Innovations Thérapeutiques) UR 20218, Faculties of Medicine and Pharmacy, University of Limoges, Limoges 87025, France.
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Pyromali I, Richard L, Derouault P, Vallat JM, Ghorab K, Magdelaine C, Sturtz F, Favreau F, Lia AS. The First Large Deletion of ATL3 Identified in a Patient Presenting with a Sensory Polyneuropathy. Biomedicines 2023; 11:1565. [PMID: 37371660 DOI: 10.3390/biomedicines11061565] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 05/26/2023] [Indexed: 06/29/2023] Open
Abstract
Hereditary sensory neuropathies (HSN) are a heterogenous group of sensory neuropathies. Mutations in ATL3 have been described in patients presenting with hereditary sensory neuropathy IF (HSN1F), a subtype of HSN. Herein, by analyzing targeted-NGS data of a patient presenting with sensory neuropathy symptoms using the CovCopCan bioinformatic tool, we discovered the presence of a deletion of around 3kb in ATL3 from Chr11:63,401,422 to Chr11:63,398,182. This deletion affects ATL3 exons 11 and 12 and could lead to the mutation c.(1036-861_1539+329del), p.(Ala346_Gln513del). In addition, an analysis of the breakpoints' sequences revealed the presence of Alu transposable elements at the position of the breakpoints, which pointed to a possible erroneous recombination event following a non-allelic-homologous-recombination mechanism in this area. Moreover, electronic microscopy analysis of the patient's nerve biopsy revealed a severe rarefaction of the myelinated fibers, a demyelinating-remyelinating process, and an abnormal aspect of the endoplasmic reticulum. These findings suggest that this structural variation could potentially be responsible for the HSN symptoms of the patient. Research of structural variations in ATL3 in numerous other patients presenting similar symptoms should be broadly investigated in order to improve patients' diagnoses.
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Affiliation(s)
- Ioanna Pyromali
- UR 20218, NeurIT, Faculty of Medicine and Pharmacy, University of Limoges, F-87000 Limoges, France
| | - Laurence Richard
- Service de Neurologie, Centre Hospitalier Universitaire (CHU) Limoges, F-87000 Limoges, France
| | - Paco Derouault
- Service de Bioinformatique, Centre Hospitalier Universitaire (CHU) Limoges, F-87000 Limoges, France
| | - Jean-Michel Vallat
- Service de Neurologie, Centre Hospitalier Universitaire (CHU) Limoges, F-87000 Limoges, France
| | - Karima Ghorab
- Service de Neurologie, Centre Hospitalier Universitaire (CHU) Limoges, F-87000 Limoges, France
| | - Corinne Magdelaine
- UR 20218, NeurIT, Faculty of Medicine and Pharmacy, University of Limoges, F-87000 Limoges, France
- Service de Biochimie et de Génétique Moléculaire, Centre Hospitalier Universitaire (CHU) Limoges, F-87000 Limoges, France
| | - Franck Sturtz
- UR 20218, NeurIT, Faculty of Medicine and Pharmacy, University of Limoges, F-87000 Limoges, France
- Service de Biochimie et de Génétique Moléculaire, Centre Hospitalier Universitaire (CHU) Limoges, F-87000 Limoges, France
| | - Frédéric Favreau
- UR 20218, NeurIT, Faculty of Medicine and Pharmacy, University of Limoges, F-87000 Limoges, France
- Service de Biochimie et de Génétique Moléculaire, Centre Hospitalier Universitaire (CHU) Limoges, F-87000 Limoges, France
| | - Anne-Sophie Lia
- UR 20218, NeurIT, Faculty of Medicine and Pharmacy, University of Limoges, F-87000 Limoges, France
- Service de Bioinformatique, Centre Hospitalier Universitaire (CHU) Limoges, F-87000 Limoges, France
- Service de Biochimie et de Génétique Moléculaire, Centre Hospitalier Universitaire (CHU) Limoges, F-87000 Limoges, France
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Frachet S, Danigo A, Labriffe M, Bessaguet F, Quinchard B, Deny N, Baffert KA, Deluche E, Sturtz F, Demiot C, Magy L. Renin-Angiotensin-System Inhibitors for the Prevention of Chemotherapy-Induced Peripheral Neuropathy: OncoToxSRA, a Preliminary Cohort Study. J Clin Med 2022; 11:jcm11102939. [PMID: 35629066 PMCID: PMC9144468 DOI: 10.3390/jcm11102939] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 05/20/2022] [Accepted: 05/20/2022] [Indexed: 11/16/2022] Open
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a frequent and dose-limiting adverse side effect of treatment. CIPN affects the oncological prognosis of patients, as well as their quality of life. To date, no specific pharmacological therapy has demonstrated effectiveness in preventing CIPN. Accumulating preclinical evidence suggests that renin-angiotensin system (RAS) inhibitors may have neuroprotective effects. One hundred and twenty patients were included in this observational study and were followed from the beginning of their neurotoxic chemotherapy schedule until their final assessment, at least one month after its cessation. The National Cancer Institute's common toxicity criteria 4.0 (NCI-CTC 4.0) were used to grade the severity of adverse events. Follow-ups also included electrochemical skin conductance and scales for pain, quality of life and disability. Among patients receiving a platinum-based regimen, the mean grade of sensory neuropathy (NCI-CTC 4.0) was significantly lower in the RAS inhibitor group after the end of their anticancer treatment schedule. Because of the observational design of the study, patients in the RAS inhibitor group cumulated comorbidities at risk of developing CIPN. Randomized controlled trials in platinum-based regimens would be worth conducting in the future to confirm the neuroprotective potential of RAS inhibitors during chemotherapy.
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Affiliation(s)
- Simon Frachet
- Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, 87000 Limoges, France;
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.D.); (B.Q.); (F.S.); (C.D.)
- Correspondence: ; Tel.: +33-5550-56568
| | - Aurore Danigo
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.D.); (B.Q.); (F.S.); (C.D.)
| | - Marc Labriffe
- Department of Pharmacology, Toxicology and Pharmacovigilance, University Hospital of Limoges, 87000 Limoges, France;
- Pharmacology & Transplantation, INSERM U1248, University of Limoges, 87025 Limoges, France
| | - Flavien Bessaguet
- INSERM 1083 CNRS UMR 6015 Mitovasc Laboratory, CarMe Team, University of Angers, 49045 Angers, France;
| | - Bianca Quinchard
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.D.); (B.Q.); (F.S.); (C.D.)
| | - Nicolas Deny
- Department of Medical Oncology, University Hospital of Limoges, 87000 Limoges, France; (N.D.); (K.-A.B.); (E.D.)
| | - Kim-Arthur Baffert
- Department of Medical Oncology, University Hospital of Limoges, 87000 Limoges, France; (N.D.); (K.-A.B.); (E.D.)
| | - Elise Deluche
- Department of Medical Oncology, University Hospital of Limoges, 87000 Limoges, France; (N.D.); (K.-A.B.); (E.D.)
| | - Franck Sturtz
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.D.); (B.Q.); (F.S.); (C.D.)
- Department of Biochemistry and Molecular Genetics, University Hospital of Limoges, 87000 Limoges, France
| | - Claire Demiot
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.D.); (B.Q.); (F.S.); (C.D.)
| | - Laurent Magy
- Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, 87000 Limoges, France;
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (A.D.); (B.Q.); (F.S.); (C.D.)
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8
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Bouchenaki H, Bernard A, Bessaguet F, Frachet S, Richard L, Sturtz F, Magy L, Bourthoumieu S, Demiot C, Danigo A. Neuroprotective Effect of Ramipril Is Mediated by AT2 in a Mouse MODEL of Paclitaxel-Induced Peripheral Neuropathy. Pharmaceutics 2022; 14:pharmaceutics14040848. [PMID: 35456682 PMCID: PMC9030366 DOI: 10.3390/pharmaceutics14040848] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/06/2022] [Accepted: 04/11/2022] [Indexed: 02/06/2023] Open
Abstract
Paclitaxel (PTX)-induced peripheral neuropathy (PIPN) induces numerous symptoms affecting patient quality of life, leading to decreased doses or even to cessation of anticancer therapy. Previous studies have reported that a widely used drug, ramipril, improves neuroprotection in several rodent models of peripheral neuropathy. The protective role of the angiotensin II type 2 receptor (AT2) in the central and peripheral nervous systems is well-established. Here, we evaluate the effects of ramipril in the prevention of PIPN and the involvement of AT2 in this effect. Paclitaxel was administered in wild type or AT2-deficient mice on alternate days for 8 days, at a cumulative dose of 8 mg/kg (2 mg/kg per injection). Ramipril, PD123319 (an AT2 antagonist), or a combination of both were administered one day before PTX administration, and daily for the next twenty days. PTX-administered mice developed mechanical allodynia and showed a loss of sensory nerve fibers. Ramipril prevented the functional and morphological alterations in PTX mice. The preventive effect of ramipril against tactile allodynia was completely absent in AT2-deficient mice and was counteracted by PD123319 administration in wild type mice. Our work highlights the potential of ramipril as a novel preventive treatment for PIPN, and points to the involvement of AT2 in the neuroprotective role of ramipril in PIPN.
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Affiliation(s)
- Hichem Bouchenaki
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (H.B.); (A.B.); (S.F.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
| | - Amandine Bernard
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (H.B.); (A.B.); (S.F.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
| | - Flavien Bessaguet
- INSERM 1083 CNRS UMR 6015 Mitovasc Laboratory, CarMe Team, University of Angers, 49045 Angers, France;
| | - Simon Frachet
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (H.B.); (A.B.); (S.F.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
- Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, 87000 Limoges, France
| | - Laurence Richard
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (H.B.); (A.B.); (S.F.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
- Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, 87000 Limoges, France
| | - Franck Sturtz
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (H.B.); (A.B.); (S.F.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
- Department of Biochemistry and Molecular Genetics, University Hospital of Limoges, 87000 Limoges, France
| | - Laurent Magy
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (H.B.); (A.B.); (S.F.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
- Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, 87000 Limoges, France
| | - Sylvie Bourthoumieu
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (H.B.); (A.B.); (S.F.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
- Department of Cytogenetic, Medical Genetic and Reproduction Biology, University Hospital of Limoges, 87000 Limoges, France
| | - Claire Demiot
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (H.B.); (A.B.); (S.F.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
- Correspondence: ; Tel.: +33-5554-35915
| | - Aurore Danigo
- UR 20218-NeurIT, Faculties of Medicine and Pharmacy, University of Limoges, 87025 Limoges, France; (H.B.); (A.B.); (S.F.); (L.R.); (F.S.); (L.M.); (S.B.); (A.D.)
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9
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Pyromali I, Benslimane N, Favreau F, Goizet C, Lazaro L, Vitry M, Derouault P, Sturtz F, Magdelaine C, Lia AS. From Negative to Positive Diagnosis: Structural Variation Could Be the Second Mutation You Are Looking for in a Recessive Autosomal Gene. J Pers Med 2022; 12:jpm12020212. [PMID: 35207700 PMCID: PMC8878780 DOI: 10.3390/jpm12020212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 01/09/2022] [Revised: 01/25/2022] [Accepted: 01/29/2022] [Indexed: 11/16/2022] Open
Abstract
Next-generation sequencing (NGS) allows the detection of plentiful mutations increasing the rate of patients getting a positive diagnosis. However, while single-nucleotide variants (SNVs) or small indels can be easily detected, structural variations (SVs) such as copy number variants (CNVs) are often not researched. In Charcot–Marie–Tooth disease (CMT), the most common hereditary peripheral neuropathy, the PMP22-duplication was the first variation detected. Since then, more than 90 other genes have been associated with CMT, with point mutations or small indels mostly described. Herein, we present a personalized approach we performed to obtain a positive diagnosis of a patient suffering from demyelinating CMT. His NGS data were aligned to the human reference sequence but also studied using the CovCopCan software, designed to detect large CNVs. This approach allowed the detection of only one mutation in SH3TC2, the frequent p.Arg954*, while SH3TC2 is known to be responsible for autosomal recessive demyelinating CMT forms. Interestingly, by modifying the standard CovCopCan use, we detected the second mutation of this patient corresponding to a 922 bp deletion in SH3TC2 (Chr5:148,390,609-Chr5:148,389,687), including only one exon (exon 14). This highlights that SVs, different from PMP22 duplication, can be responsible for peripheral neuropathy and should be searched systematically. This approach could also be employed to improve the diagnosis of all inherited diseases.
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Affiliation(s)
- Ioanna Pyromali
- Faculty of Medicine, MMNP (Maintenance Myélinique et Neuropathies Périphériques), University of Limoges, EA6309, F-87000 Limoges, France; (I.P.); (N.B.); (F.F.); (F.S.); (C.M.)
| | - Nesrine Benslimane
- Faculty of Medicine, MMNP (Maintenance Myélinique et Neuropathies Périphériques), University of Limoges, EA6309, F-87000 Limoges, France; (I.P.); (N.B.); (F.F.); (F.S.); (C.M.)
| | - Frédéric Favreau
- Faculty of Medicine, MMNP (Maintenance Myélinique et Neuropathies Périphériques), University of Limoges, EA6309, F-87000 Limoges, France; (I.P.); (N.B.); (F.F.); (F.S.); (C.M.)
- Centre Hospitalo-Universitaire (CHU) Limoges, Service de Biochimie et de Génétique Moléculaire, F-87000 Limoges, France;
| | - Cyril Goizet
- Centre Hospitalo-Universitaire (CHU) Bordeaux-GH Pellegrin Tripode, Service de Génétique Médicale, F-33076 Bordeaux, France;
| | - Leila Lazaro
- Centre Hospitalier (CH) de la Côte Basque, F-64100 Bayonne, France;
| | - Martine Vitry
- Centre Hospitalo-Universitaire (CHU) Limoges, Service de Biochimie et de Génétique Moléculaire, F-87000 Limoges, France;
| | - Paco Derouault
- Centre Hospitalo-Universitaire (CHU) Limoges, Service de Bioinformatique, F-87000 Limoges, France;
| | - Franck Sturtz
- Faculty of Medicine, MMNP (Maintenance Myélinique et Neuropathies Périphériques), University of Limoges, EA6309, F-87000 Limoges, France; (I.P.); (N.B.); (F.F.); (F.S.); (C.M.)
- Centre Hospitalo-Universitaire (CHU) Limoges, Service de Biochimie et de Génétique Moléculaire, F-87000 Limoges, France;
| | - Corinne Magdelaine
- Faculty of Medicine, MMNP (Maintenance Myélinique et Neuropathies Périphériques), University of Limoges, EA6309, F-87000 Limoges, France; (I.P.); (N.B.); (F.F.); (F.S.); (C.M.)
- Centre Hospitalo-Universitaire (CHU) Limoges, Service de Biochimie et de Génétique Moléculaire, F-87000 Limoges, France;
| | - Anne-Sophie Lia
- Faculty of Medicine, MMNP (Maintenance Myélinique et Neuropathies Périphériques), University of Limoges, EA6309, F-87000 Limoges, France; (I.P.); (N.B.); (F.F.); (F.S.); (C.M.)
- Centre Hospitalo-Universitaire (CHU) Limoges, Service de Biochimie et de Génétique Moléculaire, F-87000 Limoges, France;
- Centre Hospitalo-Universitaire (CHU) Limoges, Service de Bioinformatique, F-87000 Limoges, France;
- Correspondence: ; Tel.: +33-555-435-938
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10
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Sacco S, Bouis C, Gallard J, Pichot A, Blondiaux E, Marey I, Dorison N, Sturtz F, Cieuta-Walti C, Ravel A, Mircher C. Psychomotor development in infants and young children with Down syndrome-A prospective, repeated measure, post-hoc analysis. Am J Med Genet A 2021; 188:818-827. [PMID: 34863019 DOI: 10.1002/ajmg.a.62587] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 08/06/2021] [Accepted: 10/15/2021] [Indexed: 11/11/2022]
Abstract
Children with Down syndrome (DS) show delayed acquisition of cognitive and functional skills compared to typically developing children. The objective of this study was to accurately describe early development of infants and young children (children hereafter) with DS based on a large recent sample. We carried out repeated measure analysis of the global development quotient (GDQ) and developmental age using data from the Assessment of Systematic Treatment with Folinic Acid and Thyroid Hormone on Psychomotor Development of Down Syndrome Young Children (ACTHYF) study (NCT01576705). Because there was no statistically significant difference in the primary endpoint between active treatment and placebo, data from all treatment groups were pooled for post-hoc analysis. Data of 141 children with DS aged 6-18 months at inclusion were analyzed. Mean GDQ decreased over the study period, especially in the youngest age classes ([6-9] and [9-12] months), indicating that acquisition of skills occurred at a slower pace compared to typically developing children. Strongest deficits were observed for motor and hearing and language skills. Only GDQ at baseline correlated significantly with evolution of GDQ. Future studies should aim at elucidating the mechanisms underlying motor and language development. Early pharmacological interventions together with early childhood therapies might be necessary to improve the developmental trajectory of children with DS.
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11
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Pyromali I, Perani A, Nizou A, Benslimane N, Derouault P, Bourthoumieu S, Fradin M, Sole G, Duval F, Gomes C, Favreau F, Sturtz F, Magdelaine C, Lia AS. New structural variations responsible for Charcot-Marie-Tooth disease: The first two large KIF5A deletions detected by CovCopCan software. Comput Struct Biotechnol J 2021; 19:4265-4272. [PMID: 34429846 PMCID: PMC8355829 DOI: 10.1016/j.csbj.2021.07.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 07/19/2021] [Accepted: 07/28/2021] [Indexed: 02/01/2023] Open
Abstract
Next-generation sequencing (NGS) allows the detection of mutations in inherited genetic diseases, like the Charcot-Marie-Tooth disease (CMT) which is the most common hereditary peripheral neuropathy. The majority of mutations detected by NGS are single nucleotide variants (SNVs) or small indels, while structural variants (SVs) are often underdiagnosed. PMP22 was the first gene described as being involved in CMT via a SV of duplication type. To date, more than 90 genes are known to be involved in CMT, with mainly SNVs and short indels described. Herein targeted NGS and the CovCopCan bioinformatic tool were used in two unrelated families, both presenting with typical CMT symptoms with pyramidal involvement. We have discovered two large SVs in KIF5A, a gene known to cause axonal forms of CMT (CMT2) in which no SVs have yet been described. In the first family, the patient presented with a large deletion of 12 kb in KIF5A from Chr12:57,956,278 to Chr12:57,968,335 including exons 2–15, that could lead to mutation c.(130-943_c.1717-533del), p.(Gly44_Leu572del). In the second family, two cases presented with a large deletion of 3 kb in KIF5A from Chr12:57,974,133 to Chr12:57,977,210 including exons 24–28, that could lead to mutation c.(2539-605_*36 + 211del), p.(Leu847_Ser1032delins33). In addition, bioinformatic sequence analysis revealed that a NAHR (Non-Allelic-Homologous-Recombination) mechanism, such as those in the PMP22 duplication, could be responsible for one of the KIF5A SVs and could potentially be present in a number of other patients. This study reveals that large KIF5A deletions can cause CMT2 and highlights the importance of analyzing not only the SNVs but also the SVs during diagnosis of neuropathies.
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Key Words
- ALS, Amyotrophic Lateral Sclerosis
- CMT, Charcot-Marie-Tooth
- CMT2, Charcot-Marie-Tooth type 2
- CNV, Copy Number Variants
- Charcot-Marie-Tooth
- CovCopCan
- DSMA, Distal-Spinal-Muscular-Atrophy
- HSP10, Hereditary-Spastic-Paraplegia-type-10
- KIF5A
- NAHR, Non-Allelic Homologous Recombination
- NEIMY, Neonatal-Intractable-MYoclonus
- NGS
- NGS, Next Generation Sequencing
- SNV, Single Nucleotide Variant
- SV, Structural Variant
- Structural variations
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Affiliation(s)
| | - Alexandre Perani
- CHU Limoges, Service de Biochimie et de Génétique Moléculaire, F-87000 Limoges, France
| | | | | | - Paco Derouault
- CHU Limoges, Service de Bioinformatique, F-87000 Limoges, France
| | - Sylvie Bourthoumieu
- CHU Limoges, Service de Cytogénétique, Génétique Médicale et Biologie de la Reproduction, F-87000 Limoges, France
| | - Mélanie Fradin
- CHU Rennes, CLAD Ouest, Service de Génétique, F-35203 Rennes, France
| | - Guilhem Sole
- CHU Bordeaux (Groupe Hospitalier Pellegrin), Service de Neurologie et Centre de Référence des Maladies Neuromusculaires AOC, F-33000 Bordeaux, France
| | - Fanny Duval
- CHU Bordeaux (Groupe Hospitalier Pellegrin), Service de Neurologie et Centre de Référence des Maladies Neuromusculaires AOC, F-33000 Bordeaux, France
| | - Constantin Gomes
- Hôpital Pontchaillou, Département de Neurophysiologie, F-35200 Rennes, France
| | - Frédéric Favreau
- Univ. Limoges, MMNP, EA6309, F-87000 Limoges, France.,CHU Limoges, Service de Biochimie et de Génétique Moléculaire, F-87000 Limoges, France
| | - Franck Sturtz
- Univ. Limoges, MMNP, EA6309, F-87000 Limoges, France.,CHU Limoges, Service de Biochimie et de Génétique Moléculaire, F-87000 Limoges, France
| | - Corinne Magdelaine
- Univ. Limoges, MMNP, EA6309, F-87000 Limoges, France.,CHU Limoges, Service de Biochimie et de Génétique Moléculaire, F-87000 Limoges, France
| | - Anne-Sophie Lia
- Univ. Limoges, MMNP, EA6309, F-87000 Limoges, France.,CHU Limoges, Service de Biochimie et de Génétique Moléculaire, F-87000 Limoges, France.,CHU Limoges, Service de Bioinformatique, F-87000 Limoges, France
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12
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Miressi F, Benslimane N, Favreau F, Rassat M, Richard L, Bourthoumieu S, Laroche C, Magy L, Magdelaine C, Sturtz F, Lia AS, Faye PA. GDAP1 Involvement in Mitochondrial Function and Oxidative Stress, Investigated in a Charcot-Marie-Tooth Model of hiPSCs-Derived Motor Neurons. Biomedicines 2021; 9:biomedicines9080945. [PMID: 34440148 PMCID: PMC8393985 DOI: 10.3390/biomedicines9080945] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/27/2021] [Accepted: 07/29/2021] [Indexed: 12/15/2022] Open
Abstract
Mutations in the ganglioside-induced differentiation associated protein 1 (GDAP1) gene have been associated with demyelinating and axonal forms of Charcot-Marie-Tooth (CMT) disease, the most frequent hereditary peripheral neuropathy in humans. Previous studies reported the prevalent GDAP1 expression in neural tissues and cells, from animal models. Here, we described the first GDAP1 functional study on human induced-pluripotent stem cells (hiPSCs)-derived motor neurons, obtained from normal subjects and from a CMT2H patient, carrying the GDAP1 homozygous c.581C>G (p.Ser194*) mutation. At mRNA level, we observed that, in normal subjects, GDAP1 is mainly expressed in motor neurons, while it is drastically reduced in the patient’s cells containing a premature termination codon (PTC), probably degraded by the nonsense-mediated mRNA decay (NMD) system. Morphological and functional investigations revealed in the CMT patient’s motor neurons a decrease of cell viability associated to lipid dysfunction and oxidative stress development. Mitochondrion is a key organelle in oxidative stress generation, but it is also mainly involved in energetic metabolism. Thus, in the CMT patient’s motor neurons, mitochondrial cristae defects were observed, even if no deficit in ATP production emerged. This cellular model of hiPSCs-derived motor neurons underlines the role of mitochondrion and oxidative stress in CMT disease and paves the way for new treatment evaluation.
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Affiliation(s)
- Federica Miressi
- Maintenance Myélinique et Neuropathies Périphériques, EA6309, University of Limoges, F-87000 Limoges, France; (N.B.); (F.F.); (M.R.); (L.R.); (S.B.); (L.M.); (C.M.); (F.S.); (A.-S.L.); (P.-A.F.)
- Correspondence:
| | - Nesrine Benslimane
- Maintenance Myélinique et Neuropathies Périphériques, EA6309, University of Limoges, F-87000 Limoges, France; (N.B.); (F.F.); (M.R.); (L.R.); (S.B.); (L.M.); (C.M.); (F.S.); (A.-S.L.); (P.-A.F.)
| | - Frédéric Favreau
- Maintenance Myélinique et Neuropathies Périphériques, EA6309, University of Limoges, F-87000 Limoges, France; (N.B.); (F.F.); (M.R.); (L.R.); (S.B.); (L.M.); (C.M.); (F.S.); (A.-S.L.); (P.-A.F.)
- CHU Limoges, Service de Biochimie et Génétique Moléculaire, F-87000 Limoges, France
| | - Marion Rassat
- Maintenance Myélinique et Neuropathies Périphériques, EA6309, University of Limoges, F-87000 Limoges, France; (N.B.); (F.F.); (M.R.); (L.R.); (S.B.); (L.M.); (C.M.); (F.S.); (A.-S.L.); (P.-A.F.)
| | - Laurence Richard
- Maintenance Myélinique et Neuropathies Périphériques, EA6309, University of Limoges, F-87000 Limoges, France; (N.B.); (F.F.); (M.R.); (L.R.); (S.B.); (L.M.); (C.M.); (F.S.); (A.-S.L.); (P.-A.F.)
- CHU Limoges, Service de Neurologie, F-87000 Limoges, France
| | - Sylvie Bourthoumieu
- Maintenance Myélinique et Neuropathies Périphériques, EA6309, University of Limoges, F-87000 Limoges, France; (N.B.); (F.F.); (M.R.); (L.R.); (S.B.); (L.M.); (C.M.); (F.S.); (A.-S.L.); (P.-A.F.)
- CHU Limoges, Service de Cytogénétique, F-87000 Limoges, France
| | - Cécile Laroche
- CHU Limoges, Service de Pédiatrie, F-87000 Limoges, France;
- CHU Limoges, Centre de Compétence des Maladies Héréditaires du Métabolisme, F-87000 Limoges, France
| | - Laurent Magy
- Maintenance Myélinique et Neuropathies Périphériques, EA6309, University of Limoges, F-87000 Limoges, France; (N.B.); (F.F.); (M.R.); (L.R.); (S.B.); (L.M.); (C.M.); (F.S.); (A.-S.L.); (P.-A.F.)
- CHU Limoges, Service de Neurologie, F-87000 Limoges, France
| | - Corinne Magdelaine
- Maintenance Myélinique et Neuropathies Périphériques, EA6309, University of Limoges, F-87000 Limoges, France; (N.B.); (F.F.); (M.R.); (L.R.); (S.B.); (L.M.); (C.M.); (F.S.); (A.-S.L.); (P.-A.F.)
- CHU Limoges, Service de Biochimie et Génétique Moléculaire, F-87000 Limoges, France
| | - Franck Sturtz
- Maintenance Myélinique et Neuropathies Périphériques, EA6309, University of Limoges, F-87000 Limoges, France; (N.B.); (F.F.); (M.R.); (L.R.); (S.B.); (L.M.); (C.M.); (F.S.); (A.-S.L.); (P.-A.F.)
- CHU Limoges, Service de Biochimie et Génétique Moléculaire, F-87000 Limoges, France
| | - Anne-Sophie Lia
- Maintenance Myélinique et Neuropathies Périphériques, EA6309, University of Limoges, F-87000 Limoges, France; (N.B.); (F.F.); (M.R.); (L.R.); (S.B.); (L.M.); (C.M.); (F.S.); (A.-S.L.); (P.-A.F.)
- CHU Limoges, Service de Biochimie et Génétique Moléculaire, F-87000 Limoges, France
- CHU Limoges, Service de Bioinformatique, F-87000 Limoges, France
| | - Pierre-Antoine Faye
- Maintenance Myélinique et Neuropathies Périphériques, EA6309, University of Limoges, F-87000 Limoges, France; (N.B.); (F.F.); (M.R.); (L.R.); (S.B.); (L.M.); (C.M.); (F.S.); (A.-S.L.); (P.-A.F.)
- CHU Limoges, Service de Biochimie et Génétique Moléculaire, F-87000 Limoges, France
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13
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Bouchenaki H, Danigo A, Bernard A, Bessaguet F, Richard L, Sturtz F, Balayssac D, Magy L, Demiot C. Ramipril Alleviates Oxaliplatin-Induced Acute Pain Syndrome in Mice. Front Pharmacol 2021; 12:712442. [PMID: 34349658 PMCID: PMC8326755 DOI: 10.3389/fphar.2021.712442] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 06/25/2021] [Indexed: 02/05/2023] Open
Abstract
Oxaliplatin is a key drug for colorectal cancer that causes OXP-induced peripheral neuropathy, a dose-limiting effect characterized by cold and tactile hyperesthesia. The relationship between the sensory nervous system and modulation of the renin-angiotensin system has been described, focusing on pain and neurodegeneration in several animal models. We assessed the effect of the RAS modulator, ramipril, an angiotensin converting-enzyme inhibitor in a mouse model of OXP-induced acute pain syndrome. OXP was administered in Swiss mice at a cumulative dose of 15 mg/kg (3 x 5 mg/kg/3 days, i.p.). RAM was administered i.p. every day from 24 h before the first OXP injection until the end of the experiments. We evaluated OIAS development and treatment effects by sensorimotor tests, intraepidermal nerve fiber and dorsal root ganglia-neuron immunohistochemical analyses, and sciatic nerve ultrastructural analysis. OXP-treated mice showed tactile allodynia and cold hypersensitivity, without motor impairment and evidence of nerve degeneration. RAM prevented cold sensitivity and improved recovery of normal tactile sensitivity in OXP-treated mice. Our finding that RAM alleviates OXP-induced pain is a step towards evaluating its therapeutic potential in patients receiving OXP treatment.
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Affiliation(s)
- Hichem Bouchenaki
- EA 6309 - Myelin Maintenance and Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
| | - Aurore Danigo
- EA 6309 - Myelin Maintenance and Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
| | - Amandine Bernard
- EA 6309 - Myelin Maintenance and Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
| | - Flavien Bessaguet
- EA 6309 - Myelin Maintenance and Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
| | - Laurence Richard
- EA 6309 - Myelin Maintenance and Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France.,Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, Limoges, France
| | - Franck Sturtz
- EA 6309 - Myelin Maintenance and Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
| | - David Balayssac
- Neuro-Dol, UMR1107 INSERM, University of Clermont Auvergne, CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Laurent Magy
- EA 6309 - Myelin Maintenance and Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France.,Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, Limoges, France
| | - Claire Demiot
- EA 6309 - Myelin Maintenance and Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
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14
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Faye PA, Poumeaud F, Chazelas P, Duchesne M, Rassat M, Miressi F, Lia AS, Sturtz F, Robert PY, Favreau F, Benayoun Y. Focus on cell therapy to treat corneal endothelial diseases. Exp Eye Res 2021; 204:108462. [PMID: 33493477 DOI: 10.1016/j.exer.2021.108462] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [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: 08/13/2020] [Revised: 01/15/2021] [Accepted: 01/18/2021] [Indexed: 02/06/2023]
Abstract
The cornea is a multi-layered structure which allows fine refraction and provides both resistance to external insults and adequate transparency. The corneal endothelium ensures stromal hydration, failure of which, such as in Fuchs endothelial corneal dystrophy, after trauma or in aging, may lead to loss of corneal transparency and induce blindness. Currently, no efficient therapeutic alternatives exist except for corneal grafting. Thus corneal tissue engineering represents a valuable alternative approach, which may overcome cornea donor shortage. Several studies describe protocols to isolate, differentiate, and cultivate corneal endothelial cells (CEnCs) in vitro. Two main in vitro strategies can be described: expansion of eye-native cell populations, such as CEnCs, or the production and expansion of CEnCs from non-eye native cell populations, such as induced Pluripotent Stem Cells (iPSCs). The challenge with these cells is to obtain a monolayer of CEnCs on a biocompatible carrier, with a specific morphology (flat hexagonal cells), and with specific functions such as programmed cell cycle arrest. Another issue for this cell culture methodology is to define the adapted protocol (media, trophic factors, timeframe) that can mimic physiological development. Additionally, contamination by other cell types still represents a huge problem. Thus, purification methods, such as Fluorescence Activated Cell Sorting (FACS), Magnetic Ativated Cell Sorting (MACS) or Sedimentation Field Flow Fractionation (SdFFF) are useful. Animal models are also crucial to provide a translational approach for these therapies, integrating macro- and microenvironment influences, systemic hormonal or immune responses, and exogenous interactions. Non-eye native cell graft protocols are constantly improving both in efficacy and safety, with the aim of being the most suitable candidate for corneal therapies in future routine practice. The aim of this work is to review these different aspects with a special focus on issues facing CEnC culture in vitro, and to highlight animal graft models adapted to screen the efficacy of these different protocols.
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Affiliation(s)
- Pierre Antoine Faye
- CHU de Limoges, Service de Biochimie et Génétique Moléculaire, F-87000, Limoges, France; Université de Limoges, Faculté de Médecine, Maintenance Myélinique et Neuropathies Périphériques, EA6309, F-87000, Limoges, France.
| | - François Poumeaud
- Université de Limoges, Faculté de Médecine, Maintenance Myélinique et Neuropathies Périphériques, EA6309, F-87000, Limoges, France
| | - Pauline Chazelas
- CHU de Limoges, Service de Biochimie et Génétique Moléculaire, F-87000, Limoges, France; Université de Limoges, Faculté de Médecine, Maintenance Myélinique et Neuropathies Périphériques, EA6309, F-87000, Limoges, France
| | - Mathilde Duchesne
- Université de Limoges, Faculté de Médecine, Maintenance Myélinique et Neuropathies Périphériques, EA6309, F-87000, Limoges, France; CHU de Limoges, Laboratoire de Neurologie, F-87000, Limoges, France; CHU de Limoges, Service d'Anatomie Pathologique, F-87000, Limoges, France
| | - Marion Rassat
- Université de Limoges, Faculté de Médecine, Maintenance Myélinique et Neuropathies Périphériques, EA6309, F-87000, Limoges, France
| | - Federica Miressi
- Université de Limoges, Faculté de Médecine, Maintenance Myélinique et Neuropathies Périphériques, EA6309, F-87000, Limoges, France
| | - Anne Sophie Lia
- CHU de Limoges, Service de Biochimie et Génétique Moléculaire, F-87000, Limoges, France; Université de Limoges, Faculté de Médecine, Maintenance Myélinique et Neuropathies Périphériques, EA6309, F-87000, Limoges, France; CHU Limoges, UF de Bioinformatique, F-87000, Limoges France
| | - Franck Sturtz
- CHU de Limoges, Service de Biochimie et Génétique Moléculaire, F-87000, Limoges, France; Université de Limoges, Faculté de Médecine, Maintenance Myélinique et Neuropathies Périphériques, EA6309, F-87000, Limoges, France
| | | | - Frédéric Favreau
- CHU de Limoges, Service de Biochimie et Génétique Moléculaire, F-87000, Limoges, France; Université de Limoges, Faculté de Médecine, Maintenance Myélinique et Neuropathies Périphériques, EA6309, F-87000, Limoges, France
| | - Yohan Benayoun
- Chénieux Ophtalmologie, Polyclinique de Limoges ELSAN, F-87000, Limoges, France
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15
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Lafontaine M, Lia AS, Bourthoumieu S, Beauvais-Dzugan H, Derouault P, Arné-Bes MC, Sarret C, Laffargue F, Magot A, Sturtz F, Magy L, Magdelaine C. Clinical features of homozygous FIG4-p.Ile41Thr Charcot-Marie-Tooth 4J patients. Ann Clin Transl Neurol 2021; 8:471-476. [PMID: 33405357 PMCID: PMC7886039 DOI: 10.1002/acn3.51175] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 07/31/2020] [Accepted: 08/11/2020] [Indexed: 11/21/2022] Open
Abstract
We describe the clinical, electrodiagnostic, and genetic findings of three homozygous FIG4‐c.122T>C patients suffering from Charcot‐Marie‐Tooth disease type 4J (AR‐CMT‐FIG4). This syndrome usually involves compound heterozygosity associating FIG4‐c.122T>C, a hypomorphic allele coding an unstable FIG4‐p.Ile41Thr protein, and a null allele. While the compound heterozygous patients presenting with early onset usually show rapid progression, the homozygous patients described here show the signs of relative clinical stability. As FIG4 activity is known to be dose dependent, these patients’ observations could suggest that the therapeutic perspective of increasing levels of the protein to improve the phenotype of AR‐CMT‐FIG4‐patients might be efficient.
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Affiliation(s)
| | - Anne-Sophie Lia
- Service de Biochimie et Génétique Moléculaire, CHU Limoges, France.,Université de Limoges, MMNP, Limoges, France.,UF de Bio-informatique, CHU Limoges, France
| | | | - Hélène Beauvais-Dzugan
- Service de Biochimie et Génétique Moléculaire, CHU Limoges, France.,Université de Limoges, MMNP, Limoges, France
| | - Paco Derouault
- Service d'Histologie, Cytologie et Cytogénétique, CHU Limoges, France
| | - Marie-Christine Arné-Bes
- Explorations Neurophysiologiques, Centre SLA, Centre de référence de pathologie neuromusculaire, CHU Toulouse, France
| | | | | | - Armelle Magot
- Centre de Référence des maladies neuromusculaires AOC, CHU Hôtel Dieu, Nantes, France
| | - Franck Sturtz
- Service de Biochimie et Génétique Moléculaire, CHU Limoges, France.,Université de Limoges, MMNP, Limoges, France
| | - Laurent Magy
- Université de Limoges, MMNP, Limoges, France.,CRMR Neuropathies Périphériques Rares, CHU Limoges, France
| | - Corinne Magdelaine
- Service de Biochimie et Génétique Moléculaire, CHU Limoges, France.,Université de Limoges, MMNP, Limoges, France
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16
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Miressi F, Magdelaine C, Cintas P, Bourthoumieux S, Nizou A, Derouault P, Favreau F, Sturtz F, Faye PA, Lia AS. One Multilocus Genomic Variation Is Responsible for a Severe Charcot-Marie-Tooth Axonal Form. Brain Sci 2020; 10:brainsci10120986. [PMID: 33333791 PMCID: PMC7765239 DOI: 10.3390/brainsci10120986] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/06/2020] [Accepted: 12/09/2020] [Indexed: 12/17/2022] Open
Abstract
Charcot-Marie-Tooth (CMT) disease is a heterogeneous group of inherited disorders affecting the peripheral nervous system, with a prevalence of 1/2500. So far, mutations in more than 80 genes have been identified causing either demyelinating forms (CMT1) or axonal forms (CMT2). Consequentially, the genotype-phenotype correlation is not always easy to assess. Diagnosis could require multiple analysis before the correct causative mutation is detected. Moreover, it seems that approximately 5% of overall diagnoses for genetic diseases involves multiple genomic loci, although they are often underestimated or underreported. In particular, the combination of multiple variants is rarely described in CMT pathology and often neglected during the diagnostic process. Here, we present the complex genetic analysis of a family including two CMT cases with various severities. Interestingly, next generation sequencing (NGS) associated with Cov'Cop analysis, allowing structural variants (SV) detection, highlighted variations in MORC2 (microrchidia family CW-type zinc-finger 2) and AARS1 (alanyl-tRNA-synthetase) genes for one patient and an additional mutation in MFN2 (Mitofusin 2) in the more affected patient.
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Affiliation(s)
- Federica Miressi
- Maintenance Myélinique et Neuropathies Périphériques, Université de Limoges, EA 6309, F-87000 Limoges, France; (C.M.); (S.B.); (A.N.); (F.F.); (F.S.); (P.-A.F.); (A.-S.L.)
- Correspondence:
| | - Corinne Magdelaine
- Maintenance Myélinique et Neuropathies Périphériques, Université de Limoges, EA 6309, F-87000 Limoges, France; (C.M.); (S.B.); (A.N.); (F.F.); (F.S.); (P.-A.F.); (A.-S.L.)
- Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire à Limoges, F-87000 Limoges, France
| | - Pascal Cintas
- Service de Neurologie, Centre Hospitalier Universitaire à Toulouse, F-31000 Toulouse, France;
| | - Sylvie Bourthoumieux
- Maintenance Myélinique et Neuropathies Périphériques, Université de Limoges, EA 6309, F-87000 Limoges, France; (C.M.); (S.B.); (A.N.); (F.F.); (F.S.); (P.-A.F.); (A.-S.L.)
- Service de Cytogénétique, Centre Hospitalier Universitaire à Limoges, F-87000 Limoges, France
| | - Angélique Nizou
- Maintenance Myélinique et Neuropathies Périphériques, Université de Limoges, EA 6309, F-87000 Limoges, France; (C.M.); (S.B.); (A.N.); (F.F.); (F.S.); (P.-A.F.); (A.-S.L.)
| | - Paco Derouault
- Service de Bioinformatique, Centre Hospitalier Universitaire à Limoges, F-87000 Limoges, France;
| | - Frédéric Favreau
- Maintenance Myélinique et Neuropathies Périphériques, Université de Limoges, EA 6309, F-87000 Limoges, France; (C.M.); (S.B.); (A.N.); (F.F.); (F.S.); (P.-A.F.); (A.-S.L.)
- Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire à Limoges, F-87000 Limoges, France
| | - Franck Sturtz
- Maintenance Myélinique et Neuropathies Périphériques, Université de Limoges, EA 6309, F-87000 Limoges, France; (C.M.); (S.B.); (A.N.); (F.F.); (F.S.); (P.-A.F.); (A.-S.L.)
- Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire à Limoges, F-87000 Limoges, France
| | - Pierre-Antoine Faye
- Maintenance Myélinique et Neuropathies Périphériques, Université de Limoges, EA 6309, F-87000 Limoges, France; (C.M.); (S.B.); (A.N.); (F.F.); (F.S.); (P.-A.F.); (A.-S.L.)
- Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire à Limoges, F-87000 Limoges, France
| | - Anne-Sophie Lia
- Maintenance Myélinique et Neuropathies Périphériques, Université de Limoges, EA 6309, F-87000 Limoges, France; (C.M.); (S.B.); (A.N.); (F.F.); (F.S.); (P.-A.F.); (A.-S.L.)
- Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire à Limoges, F-87000 Limoges, France
- Service de Bioinformatique, Centre Hospitalier Universitaire à Limoges, F-87000 Limoges, France;
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17
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Bouchenaki H, Danigo A, Sturtz F, Hajj R, Magy L, Demiot C. An overview of ongoing clinical trials assessing pharmacological therapeutic strategies to manage chemotherapy-induced peripheral neuropathy, based on preclinical studies in rodent models. Fundam Clin Pharmacol 2020; 35:506-523. [PMID: 33107619 DOI: 10.1111/fcp.12617] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 06/19/2020] [Revised: 10/07/2020] [Accepted: 10/13/2020] [Indexed: 12/22/2022]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a major dose-limiting side effect induced by a variety of chemotherapeutic agents. Symptoms are mainly sensory: pain, tingling, numbness, and temperature sensitivity. They may require the tapering of chemotherapy regimens or even their cessation; thus, the prevention/treatment of CIPN is critical to increase effectiveness of cancer treatment. However, CIPN management is mainly based on conventional neuropathic pain treatments, with poor clinical efficacy. Therefore, significant effort is made to identify new pharmacological targets to prevent/treat CIPN. Animal modeling is a key component in predicting human response to drugs and in understanding the pathophysiological mechanisms underlying CIPN. In fact, studies performed in rodents highlighted several pharmacological targets to treat/prevent CIPN. This review provides updated information about ongoing clinical trials testing drugs for the management of CIPN and presents some of their proof-of-concept studies conducted in rodent models. The presented drugs target oxidative stress, renin-angiotensin system, glutamatergic neurotransmission, sphingolipid metabolism, neuronal uptake transporters, nicotinamide adenine dinucleotide metabolism, endocannabinoid system, transient receptor potential channels, and serotoninergic receptors. As some clinical trials focus on the effect of the drugs on pain, others evaluate their efficacy by assessing general neuropathy. Moreover, based on studies conducted in rodent models, it remains unclear if some of the tested drugs act in an antinociceptive fashion or have neuroprotective properties. Thus, further investigations are needed to understand their mechanism of action, as well as a global standardization of the methods used to assess efficacy of new therapeutic strategies in the treatment of CIPN.
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Affiliation(s)
- Hichem Bouchenaki
- EA 6309 - Myelin Maintenance & Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France.,Pharnext SA, Issy-les-Moulineaux, France
| | - Aurore Danigo
- EA 6309 - Myelin Maintenance & Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
| | - Franck Sturtz
- EA 6309 - Myelin Maintenance & Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
| | | | - Laurent Magy
- Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, Limoges, France
| | - Claire Demiot
- EA 6309 - Myelin Maintenance & Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
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18
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Caillaud M, Msheik Z, Ndong-Ntoutoume GMA, Vignaud L, Richard L, Favreau F, Faye PA, Sturtz F, Granet R, Vallat JM, Sol V, Desmoulière A, Billet F. Curcumin-cyclodextrin/cellulose nanocrystals improve the phenotype of Charcot-Marie-Tooth-1A transgenic rats through the reduction of oxidative stress. Free Radic Biol Med 2020; 161:246-262. [PMID: 32980538 DOI: 10.1016/j.freeradbiomed.2020.09.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/09/2020] [Accepted: 09/20/2020] [Indexed: 12/16/2022]
Abstract
The most prevalent form of Charcot-Marie-Tooth disease (CMT type 1A) is characterized by duplication of the PMP22 gene, peripheral dysmyelination and decreased nerve conduction velocities leading to muscle weakness. Recently, oxidative stress was reported as a feature in CMT1A patients. Curcumin exhibits antioxidant activities and has shown beneficial properties on peripheral nerves. However, curcumin presents unfavorable pharmacokinetics. We developed curcumin-cyclodextrin/cellulose nanocrystals (Nano-Cur) to bypass this limitation. The present study investigated the therapeutic potential of Nano-Cur in vitro in Schwann cells (SCs) and in vivo in the transgenic CMT1A rat model. In vitro, Nano-Cur treatment (0.01 μM for 8 h) reduced reactive oxygen species and improved mitochondrial membrane potential in CMT1A SCs. Moreover, Nano-Cur treatment (0.01 μM for 1 week) increased the expression of myelin basic protein in SC/neuron co-cultures. Preliminary in vivo experiments carried out in WT rats showed that intraperitoneal (i.p.) injection of Nano-Cur treatment containing 0.2 mg/kg of curcumin strongly enhanced the bioavailability of curcumin. Afterwards, in 1-month-old male CMT1A rats, Nano-Cur treatment (0.2 mg/kg/day, i.p. for 8 weeks) significantly improved sensori-motor functions (grip strength, balance performance, and mechanical and thermal sensitivities). Importantly, sensory and motor nerve conduction velocities were improved. Further histological and biochemical analyses indicated that myelin sheath thickness and myelin protein expression (myelin protein zero and PMP22) were increased. In addition, oxidative stress markers were decreased in the sciatic nerve and gastrocnemius muscle. Finally, Nrf2 expression and some major antioxidant enzymes were increased in sciatic nerve. Therefore, Nano-Cur significantly improved cellular, electrophysiological, and functional features of CMT1A rats.
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Affiliation(s)
- Martial Caillaud
- EA6309, Myelin Maintenance and Peripheral Neuropathies, University of Limoges, Faculties of Medicine and Pharmacy, F-87000, Limoges, France; Department of Pharmacology and Toxicology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA, USA
| | - Zeina Msheik
- EA6309, Myelin Maintenance and Peripheral Neuropathies, University of Limoges, Faculties of Medicine and Pharmacy, F-87000, Limoges, France
| | - Gautier M-A Ndong-Ntoutoume
- EA7500, PEIRENE Laboratory, Faculty of Science and Technology, University of Limoges, F-87000, Limoges, France
| | - Laetitia Vignaud
- EA6309, Myelin Maintenance and Peripheral Neuropathies, University of Limoges, Faculties of Medicine and Pharmacy, F-87000, Limoges, France
| | - Laurence Richard
- EA6309, Myelin Maintenance and Peripheral Neuropathies, University of Limoges, Faculties of Medicine and Pharmacy, F-87000, Limoges, France; Reference Center for Rare Peripheral Neuropathies, Department of Neurology, University Hospital of Limoges, F-87000, Limoges, France
| | - Frédéric Favreau
- EA6309, Myelin Maintenance and Peripheral Neuropathies, University of Limoges, Faculties of Medicine and Pharmacy, F-87000, Limoges, France; Department of Biochemistry, University Hospital of Limoges, F-87000, Limoges, France
| | - Pierre-Antoine Faye
- EA6309, Myelin Maintenance and Peripheral Neuropathies, University of Limoges, Faculties of Medicine and Pharmacy, F-87000, Limoges, France; Department of Biochemistry, University Hospital of Limoges, F-87000, Limoges, France
| | - Franck Sturtz
- EA6309, Myelin Maintenance and Peripheral Neuropathies, University of Limoges, Faculties of Medicine and Pharmacy, F-87000, Limoges, France; Department of Biochemistry, University Hospital of Limoges, F-87000, Limoges, France
| | - Robert Granet
- EA7500, PEIRENE Laboratory, Faculty of Science and Technology, University of Limoges, F-87000, Limoges, France
| | - Jean-Michel Vallat
- Reference Center for Rare Peripheral Neuropathies, Department of Neurology, University Hospital of Limoges, F-87000, Limoges, France
| | - Vincent Sol
- EA7500, PEIRENE Laboratory, Faculty of Science and Technology, University of Limoges, F-87000, Limoges, France
| | - Alexis Desmoulière
- EA6309, Myelin Maintenance and Peripheral Neuropathies, University of Limoges, Faculties of Medicine and Pharmacy, F-87000, Limoges, France
| | - Fabrice Billet
- EA6309, Myelin Maintenance and Peripheral Neuropathies, University of Limoges, Faculties of Medicine and Pharmacy, F-87000, Limoges, France.
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19
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Hakim F, Chianea T, Sturtz F, Paraf F, Gaulier JM. Interpretation of the toxicological findings in a probably Energy drink intake-related fatality. Toxicologie Analytique et Clinique 2020. [DOI: 10.1016/j.toxac.2020.04.004] [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: 11/15/2022]
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20
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Miressi F, Faye PA, Pyromali I, Bourthoumieux S, Derouault P, Husson M, Favreau F, Sturtz F, Magdelaine C, Lia AS. A mutation can hide another one: Think Structural Variants! Comput Struct Biotechnol J 2020; 18:2095-2099. [PMID: 32832037 PMCID: PMC7424167 DOI: 10.1016/j.csbj.2020.07.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 06/29/2020] [Accepted: 07/25/2020] [Indexed: 12/25/2022] Open
Abstract
Next Generation Sequencing (NGS) using capture or amplicons strategies allows the detection of a large number of mutations increasing the rate of positive diagnosis for the patients. However, most of the detected mutations are Single Nucleotide Variants (SNVs) or small indels. Structural Variants (SVs) are often underdiagnosed in inherited genetic diseases, probably because few user-friendly tools are available for biologists or geneticists to identify them easily. We present here the diagnosis of two brothers presenting a demyelinating motor-sensitive neuropathy: a presumed homozygous c.5744_5745delAT in exon 10 of SACS gene was initially detected, while actually these patients were heterozygous for this mutation and harbored a large deletion of SACS exon 10 in the other allele. This hidden mutation has been detected thanks to the user-friendly CovCopCan software. We recommend to systematically use such a software to screen NGS data in order to detect SVs, such as Copy Number Variations, to improve diagnosis of the patients.
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Affiliation(s)
| | - Pierre-Antoine Faye
- Univ. Limoges, MMNP, EA 6309, F-87000 Limoges, France.,CHU Limoges, Service de Biochimie et Génétique Moléculaire, F-87000 Limoges, France
| | | | - Sylvie Bourthoumieux
- Univ. Limoges, MMNP, EA 6309, F-87000 Limoges, France.,CHU Limoges, Service de Cytogénétique, F-87000 Limoges, France
| | - Paco Derouault
- CHU Limoges, Service de Bioinformatique, F-87000 Limoges, France
| | - Marie Husson
- CHU Bordeaux, Service de Neurologie, F-33076 Bordeaux, France
| | - Frédéric Favreau
- Univ. Limoges, MMNP, EA 6309, F-87000 Limoges, France.,CHU Limoges, Service de Biochimie et Génétique Moléculaire, F-87000 Limoges, France
| | - Franck Sturtz
- Univ. Limoges, MMNP, EA 6309, F-87000 Limoges, France.,CHU Limoges, Service de Biochimie et Génétique Moléculaire, F-87000 Limoges, France
| | - Corinne Magdelaine
- Univ. Limoges, MMNP, EA 6309, F-87000 Limoges, France.,CHU Limoges, Service de Biochimie et Génétique Moléculaire, F-87000 Limoges, France
| | - Anne-Sophie Lia
- Univ. Limoges, MMNP, EA 6309, F-87000 Limoges, France.,CHU Limoges, Service de Biochimie et Génétique Moléculaire, F-87000 Limoges, France.,CHU Limoges, Service de Bioinformatique, F-87000 Limoges, France
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21
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Tholance Y, Tricard J, Chianea T, Marquet P, Ponsonnard S, Sturtz F, Piccardo A, Gauthier T. Metabolic alterations of uterine grafts after extended cold ischemic storage: experimental study in ewes. Mol Hum Reprod 2020; 25:647-659. [PMID: 31323687 DOI: 10.1093/molehr/gaz041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 06/06/2019] [Accepted: 07/10/2019] [Indexed: 01/14/2023] Open
Abstract
Uterine transplantation from a deceased donor could become an available option for widely treating uterine infertility. However, this procedure requires more precise knowledge about the graft's tolerance to extended cold ischemia. Here, we sought to assess the uterine metabolic alterations after extended cold ischemic storage in a model of auto-transplantation in ewe. A total of 14 uterine auto-transplantations were performed, divided into 2 groups: 7 after 3 h of cold ischemia time (CIT) and 7 after 24 h. Venous uterine blood was collected before uterus retrieval and during reperfusion (30, 60 and 90 min); thereafter, blood gases, lactate, glucose and amino acids (AAs) were analyzed. Apoptosis analyses were performed before uterus retrieval and following reperfusion in uterus biopsies. A total of 12 uterine auto-transplantations were successfully performed and 7 ewes were alive ≥8 days after transplantation. After reperfusion, a decrease in pH, a rise of lactate and lactate/glucose ratio and a delayed decrease of pO2 were found in the 3 h CIT group. No significant variation of these parameters was observed in the 24 h CIT group. Significant decreases of AAs were observed during reperfusion and these decreases were more pronounced and concerned a larger number of compounds in the 24 h CIT group than in the 3 h CIT group. There was no significant uterine apoptotic signal in either group. Overall, these results suggest that extended CIT storage delayed restoration of aerobic glycolysis and induced an increase in AA requirements of the uterus after reperfusion. However, this biochemical alteration did not reduce success rate for uterine transplantation.
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Affiliation(s)
- Yannick Tholance
- Department of Biochemistry and Molecular Genetics, Dupuytren University Hospital, F-87000 Limoges, France.,Synaptopathies and Autoantibodies, Institut NeuroMyoGene Institut national de la santé et de la recherche médicale (INSERM) U1217/Centre national de la recherche scientifique (CNRS) Unités Mixtes de Recherche (UMR) 5310, University of Lyon, University Jean-Monnet, F-42270 Saint-Priest-en-Jarez, France
| | - Jeremy Tricard
- Department of Thoracic and Cardiovascular Surgery and Angiology, Dupuytren University Hospital, F-87000 Limoges, France.,Individual Profiling and Prevention of Risks with Immunosuppressive Therapies and Transplantation, UMR 1248 INSERM, School of Medicine, University of Limoges, F-87000 Limoges, France
| | - Thierry Chianea
- Department of Biochemistry and Molecular Genetics, Dupuytren University Hospital, F-87000 Limoges, France
| | - Pierre Marquet
- Individual Profiling and Prevention of Risks with Immunosuppressive Therapies and Transplantation, UMR 1248 INSERM, School of Medicine, University of Limoges, F-87000 Limoges, France.,Department of Pharmacology and Toxicology, Dupuytren University Hospital, F-87000 Limoges, France
| | | | - Franck Sturtz
- Department of Biochemistry and Molecular Genetics, Dupuytren University Hospital, F-87000 Limoges, France.,EA 6309-Myelin Maintenance and Peripheral Neuropathies, School of Medicine, University of Limoges, F-87000 Limoges, France
| | - Alessandro Piccardo
- Department of Thoracic and Cardiovascular Surgery and Angiology, Dupuytren University Hospital, F-87000 Limoges, France
| | - Tristan Gauthier
- Individual Profiling and Prevention of Risks with Immunosuppressive Therapies and Transplantation, UMR 1248 INSERM, School of Medicine, University of Limoges, F-87000 Limoges, France.,Department of Gynecology and Obstetrics, Dupuytren University Hospital, F-87000 Limoges, France
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22
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Ballouhey Q, Fourcade L, Richard L, Bellet C, El Hamel C, Vallat JM, Sturtz F, Bourthoumieu S. Epithelial changes of congenital intestinal obstruction in a rat model. PLoS One 2020; 15:e0232023. [PMID: 32352981 PMCID: PMC7192479 DOI: 10.1371/journal.pone.0232023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 04/06/2020] [Indexed: 11/18/2022] Open
Abstract
Introduction Intestinal atresia is a rare congenital affliction that is often associated with severe bacterial infections despite adequate neonatal surgery. Previous studies have focused on enteric nervous system variations. We hypothesized that epithelial systems (ES) may also be involved in the pathophysiology of postnatal disorders. Materials and methods Global gene expression was measured by transcriptomic analysis in a rat model of induced intestinal atresia. The analyses then focused on genes involved in ES (enterocytes and goblet cells). Rat fetus small intestines at various stages of development (ED15, ED17, ED19, and ED21, n = 22), were used as non-operated controls and compared to the upper and lower segments of rat fetus small intestines with an induced atresia (n = 14; ligature at ED18). The pattern of gene expression was then confirmed by histochemistry, electron microscopy, and RT-qPCR. Results From ED15 to ED21, the expression of several genes exhibited a physiological increase of ES markers, with a significant increase at the end of gestation. The operated embryos exhibited significantly higher variations of gene expression in the proximal segment than in the distal segment in terms of absorption and the epithelial barrier. An increase in goblet cells and markers was observed in the proximal segment compared to the controls. Conclusion Fetal intestinal obstruction accelerates maturation in the proximal segment and disrupts the intestinal wall in the distal segment, with a decrease in the number of mucosal cells. Moreover, the epithelial cells underwent significant changes, supporting the notion that intestinal disorders involve more than the ENS.
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Affiliation(s)
- Quentin Ballouhey
- Myelin Maintenance and Peripheral Neuropathies, EA6309, University of Limoges, Limoges, France.,Department of Pediatric Surgery, UHC Limoges, Limoges, France
| | - Laurent Fourcade
- Myelin Maintenance and Peripheral Neuropathies, EA6309, University of Limoges, Limoges, France.,Department of Pediatric Surgery, UHC Limoges, Limoges, France
| | - Laurence Richard
- Myelin Maintenance and Peripheral Neuropathies, EA6309, University of Limoges, Limoges, France.,Department of Neurology, UHC Limoges, Limoges, France
| | - Camille Bellet
- Myelin Maintenance and Peripheral Neuropathies, EA6309, University of Limoges, Limoges, France
| | - Chaharazed El Hamel
- Department of Histology, Cytology, and Cytogenetics, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - Jean Michel Vallat
- Myelin Maintenance and Peripheral Neuropathies, EA6309, University of Limoges, Limoges, France.,Department of Neurology, UHC Limoges, Limoges, France
| | - Franck Sturtz
- Myelin Maintenance and Peripheral Neuropathies, EA6309, University of Limoges, Limoges, France.,Department of Biochemistry and Molecular Genetics, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - Sylvie Bourthoumieu
- Myelin Maintenance and Peripheral Neuropathies, EA6309, University of Limoges, Limoges, France.,Department of Histology, Cytology, and Cytogenetics, Centre Hospitalier Universitaire de Limoges, Limoges, France
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23
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Derouault P, Chauzeix J, Rizzo D, Miressi F, Magdelaine C, Bourthoumieu S, Durand K, Dzugan H, Feuillard J, Sturtz F, Mérillou S, Lia AS. CovCopCan: An efficient tool to detect Copy Number Variation from amplicon sequencing data in inherited diseases and cancer. PLoS Comput Biol 2020; 16:e1007503. [PMID: 32049956 PMCID: PMC7041855 DOI: 10.1371/journal.pcbi.1007503] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 02/25/2020] [Accepted: 10/23/2019] [Indexed: 02/07/2023] Open
Abstract
Molecular diagnosis is an essential step of patient care. An increasing number of Copy Number Variations (CNVs) have been identified that are involved in inherited and somatic diseases. However, there are few existing tools to identify them among amplicon sequencing data generated by Next Generation Sequencing (NGS). We present here a new tool, CovCopCan, that allows the rapid and easy detection of CNVs in inherited diseases, as well as somatic data of patients with cancer, even with a low ratio of cancer cells to healthy cells. This tool could be very useful for molecular geneticists to rapidly identify CNVs in an interactive and user-friendly way.
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Affiliation(s)
| | - Jasmine Chauzeix
- CHU Limoges, Service Hématologie Biologique, Limoges, France
- Univ. Limoges, UMR CNRS 7276 CRIBL, Limoges, France
| | - David Rizzo
- CHU Limoges, Service Hématologie Biologique, Limoges, France
- Univ. Limoges, UMR CNRS 7276 CRIBL, Limoges, France
| | | | - Corinne Magdelaine
- Univ. Limoges, MMNP, EA 6309, Limoges, France
- CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges France
| | - Sylvie Bourthoumieu
- Univ. Limoges, MMNP, EA 6309, Limoges, France
- CHU Limoges, Service de Cytogénétique, Limoges, France
| | - Karine Durand
- CHU Limoges, Service Anatomie Pathologie, Limoges, France
- Univ. Limoges, EA CAPTur, Limoges, France
| | - Hélène Dzugan
- Univ. Limoges, MMNP, EA 6309, Limoges, France
- CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges France
| | - Jean Feuillard
- CHU Limoges, Service Hématologie Biologique, Limoges, France
- Univ. Limoges, UMR CNRS 7276 CRIBL, Limoges, France
| | - Franck Sturtz
- Univ. Limoges, MMNP, EA 6309, Limoges, France
- CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges France
| | | | - Anne-Sophie Lia
- CHU Limoges, UF de Bioinformatique, Limoges France
- Univ. Limoges, MMNP, EA 6309, Limoges, France
- CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges France
- * E-mail:
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24
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Lerat J, Magdelaine C, Derouault P, Beauvais-Dzugan H, Bieth E, Acket B, Arne-Bes MC, Sturtz F, Lia AS. New PRPS1 variant p.(Met68Leu) located in the dimerization area identified in a French CMTX5 patient. Mol Genet Genomic Med 2019; 7:e875. [PMID: 31338985 PMCID: PMC6732271 DOI: 10.1002/mgg3.875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 05/21/2019] [Accepted: 07/08/2019] [Indexed: 12/04/2022] Open
Abstract
Background CMTX5 is characterized by peripheral neuropathy, early‐onset sensorineural hearing impairment, and optic neuropathy. Only seven variants have been reported and no genotype‐phenotype correlations have yet been established. PRPS1 has a crystallographic structure, as it is composed of three dimers that constitute a hexamer. Methods Next‐generation sequencing (NGS) was performed using a custom 92‐gene panel designed for the diagnosis of Charcot‐Marie‐Tooth (CMT) and associated neuropathies. Results We report the case of a 35‐year‐old male, who had presented CMT and hearing loss since childhood associated to bilateral optic neuropathy without any sign of retinitis pigmentosa. A new hemizygous variant on chromosomic position X:106,882,604, in the PRPS1 gene, c.202A > T, p.(Met68Leu) was found. This change is predicted to lead to an altered affinity between the different subunits in the dimer, thereby may prevent the hexamer formation. Conclusion CMTX5 is probably under‐diagnosed, as an overlap among the different features due to PRPS1 exists. Patients who developed polyneuropathy associated to sensorineural deafness and optic atrophy during childhood should be assessed for PRPS1.
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Affiliation(s)
- Justine Lerat
- Univ. Limoges, MMNP, Limoges, France.,CHU Limoges, Service Oto-Rhino-Laryngologie et Chirurgie Cervico-Faciale, Limoges, France
| | - Corinne Magdelaine
- Univ. Limoges, MMNP, Limoges, France.,CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges, France
| | - Paco Derouault
- CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges, France
| | - Hélène Beauvais-Dzugan
- Univ. Limoges, MMNP, Limoges, France.,CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges, France
| | - Eric Bieth
- CHU Toulouse, Service Génétique Médicale, Toulouse, France
| | - Blandine Acket
- CHU Toulouse, Explorations neurophysiologiques, Centre SLA, Centre de référence de pathologie neuromusculaire, Toulouse, France
| | - Marie-Christine Arne-Bes
- CHU Toulouse, Explorations neurophysiologiques, Centre SLA, Centre de référence de pathologie neuromusculaire, Toulouse, France
| | - Franck Sturtz
- Univ. Limoges, MMNP, Limoges, France.,CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges, France
| | - Anne-Sophie Lia
- Univ. Limoges, MMNP, Limoges, France.,CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges, France
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25
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Lerat J, Magdelaine C, Roux AF, Darnaud L, Beauvais-Dzugan H, Naud S, Richard L, Derouault P, Ghorab K, Magy L, Vallat JM, Cintas P, Bieth E, Arne-Bes MC, Goizet C, Espil-Taris C, Journel H, Toutain A, Urtizberea JA, Boespflug-Tanguy O, Laffargue F, Corcia P, Pasquier L, Fradin M, Napuri S, Ciron J, Boulesteix JM, Sturtz F, Lia AS. Hearing loss in inherited peripheral neuropathies: Molecular diagnosis by NGS in a French series. Mol Genet Genomic Med 2019; 7:e839. [PMID: 31393079 PMCID: PMC6732311 DOI: 10.1002/mgg3.839] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 05/19/2019] [Accepted: 05/22/2019] [Indexed: 02/02/2023] Open
Abstract
Background The most common inherited peripheral neuropathy is Charcot‐Marie‐Tooth disease (CMT), with a prevalence of 1/2500. Other symptoms can be associated to the condition, such as hearing loss. Currently, no global hearing impairment assessment has been determined, and the physiopathology is not well known. Methods The aim of the study was to analyze among a French series of 3,412 patients with inherited peripheral neuropathy (IPN), the ones who also suffer from hearing loss, to establish phenotype‐genotype correlations. An NGS strategy for IPN one side and nonsyndromic hearing loss (NSHL) on the other side, were performed. Results Hearing loss (HL) was present in only 44 patients (1.30%). The clinical data of 27 patients were usable. Demyelinating neuropathy was diagnosed in 15 cases and axonal neuropathy in 12 cases. HL varied from mild to profound. Five cases of auditory neuropathy were noticed. Diagnosis was made for 60% of these patients. Seven novel pathogenic variants were discovered in five different genes: PRPS1; MPZ; SH3TC2; NEFL; and ABHD12. Two patients with PMP22 variant, had also an additional variant in COCH and MYH14 respectively. No pathogenic variant was found at the DFNB1 locus. Genotype‐phenotype correlations do exist, especially with SH3TC2, PRPS1, ABHD12, NEFL, and TRPV4. Conclusion Involvement of PMP22 is not enough to explain hearing loss in patients suffering from IPN. HL can be due to cochlear impairment and/or auditory nerve dysfunction. HL is certainly underdiagnosed, and should be evaluated in every patient suffering from IPN.
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Affiliation(s)
- Justine Lerat
- University of Limoges, MMNP, Limoges, France.,Service Oto-Rhino-Laryngologie et Chirurgie Cervico-Faciale, CHU Limoges, Limoges, France
| | - Corinne Magdelaine
- University of Limoges, MMNP, Limoges, France.,Service Biochimie et Génétique Moléculaire, CHU Limoges, Limoges, France
| | - Anne-Françoise Roux
- Laboratoire de Génétique Moléculaire, CHU Montpellier, Montpellier, France.,University of Montpellier, Montpellier, France
| | - Léa Darnaud
- Service Biochimie et Génétique Moléculaire, CHU Limoges, Limoges, France
| | - Hélène Beauvais-Dzugan
- University of Limoges, MMNP, Limoges, France.,Service Biochimie et Génétique Moléculaire, CHU Limoges, Limoges, France
| | - Steven Naud
- Service Biochimie et Génétique Moléculaire, CHU Limoges, Limoges, France
| | - Laurence Richard
- CRMR Neuropathies Périphériques Rares, CHU Limoges, Limoges, France
| | - Paco Derouault
- Service Biochimie et Génétique Moléculaire, CHU Limoges, Limoges, France
| | - Karima Ghorab
- University of Limoges, MMNP, Limoges, France.,CRMR Neuropathies Périphériques Rares, CHU Limoges, Limoges, France
| | - Laurent Magy
- University of Limoges, MMNP, Limoges, France.,CRMR Neuropathies Périphériques Rares, CHU Limoges, Limoges, France
| | | | - Pascal Cintas
- Service de Neurologie et d'explorations fonctionnelles, CHU Toulouse, Toulouse, France.,Service de Neurologie, Centre de référence de pathologie neuromusculaire, CHU Toulouse, Toulouse, France
| | - Eric Bieth
- Service de Génétique Médicale, CHU Toulouse, Toulouse, France
| | | | - Cyril Goizet
- Service de Neurogénétique, CHU Bordeaux, Bordeaux, France
| | | | - Hubert Journel
- Service de Génétique Médicale, CH Bretagne Atlantique, Vannes, France
| | | | | | | | - Fanny Laffargue
- Service de Génétique médicale, CHU Clermont-Ferrand, Clermont-Ferrand, France
| | | | | | - Mélanie Fradin
- Service de Génétique médicale, CHU Rennes, Rennes, France
| | - Sylva Napuri
- Service de Pédiatrie, CHU Rennes, Rennes, France
| | | | | | - Franck Sturtz
- University of Limoges, MMNP, Limoges, France.,Service Biochimie et Génétique Moléculaire, CHU Limoges, Limoges, France
| | - Anne-Sophie Lia
- University of Limoges, MMNP, Limoges, France.,Service Biochimie et Génétique Moléculaire, CHU Limoges, Limoges, France
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26
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Lerat J, Magdelaine C, Lunati A, Dzugan H, Dejoie C, Rego M, Beze Beyrie P, Bieth E, Calvas P, Cintas P, Delaubrier A, Demurger F, Gilbert-Dussardier B, Goizet C, Journel H, Laffargue F, Magy L, Taithe F, Toutain A, Urtizberea JA, Sturtz F, Lia AS. Implication of the SH3TC2 gene in Charcot-Marie-Tooth disease associated with deafness and/or scoliosis: Illustration with four new pathogenic variants. J Neurol Sci 2019; 406:116376. [PMID: 31634715 DOI: 10.1016/j.jns.2019.06.027] [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] [Received: 01/23/2019] [Revised: 06/07/2019] [Accepted: 06/24/2019] [Indexed: 11/30/2022]
Abstract
The autosomal recessive demyelinating form of Charcot-Marie-Tooth can be due to SH3TC2 gene pathogenic variants (CMT4C, AR-CMTde-SH3TC2). We report on a series of 13 patients with AR-CMTde-SH3TC2 among a French cohort of 350 patients suffering from all type of inheritance peripheral neuropathy. The SH3TC2 gene appeared to be the most frequently mutated gene for demyelinating neuropathy in this series by NGS. Four new pathogenic variants have been identified: two nonsense variants (p.(Tyr970*), p.(Trp1199*)) and two missense variants (p.(Leu1126Pro), p.(Ala1206Asp)). The recurrent variant p.Arg954* was present in 62%, and seems to be a founder mutation. The phenotype is fairly homogeneous, as all these patients, except the youngest ones, presented scoliosis and/or hearing loss.
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Affiliation(s)
- J Lerat
- Service Oto-Rhino-Laryngologie, Centre Hospitalier Universitaire de Limoges, Limoges, France; EA6309, Université de Limoges, Limoges, France.
| | - C Magdelaine
- EA6309, Université de Limoges, Limoges, France; Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - A Lunati
- EA6309, Université de Limoges, Limoges, France; Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - H Dzugan
- EA6309, Université de Limoges, Limoges, France; Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - C Dejoie
- Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - M Rego
- Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | | | - E Bieth
- Service de Génétique Médicale, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - P Calvas
- Service de Génétique Médicale, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - P Cintas
- Service de Neurologie et d'explorations fonctionnelles, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - A Delaubrier
- Service de Médecine Physique et Rééducation, Centre Hospitalier Universitaire de Poitiers, Poitiers, France
| | - F Demurger
- Service de Génétique Médicale, Centre Hospitalier Bretagne Atlantique, Vannes, France
| | - B Gilbert-Dussardier
- Service de Génétique Médicale, Centre Hospitalier Universitaire de Poitiers, Poitiers, France; EA3808, Université de Poitiers, Poitiers, France
| | - C Goizet
- Service de Neurogénétique, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
| | - H Journel
- Service de Génétique Médicale, Centre Hospitalier Bretagne Atlantique, Vannes, France
| | - F Laffargue
- Service de Génétique médicale, Centre Hospitalier Universitaire de Clermont-Ferrand, Limoges, France
| | - L Magy
- EA6309, Université de Limoges, Limoges, France; Service de Neurologie, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - F Taithe
- Service de Neurologie, Centre Hospitalier Universitaire de Clermont-Ferrand, Limoges, France
| | - A Toutain
- Service de Génétique, Centre Hospitalier Universitaire de Tours, Tours, France
| | - J A Urtizberea
- Centre de Compétence Neuromusculaire, APHP, Filnemus, Centre Hospitalier Hendaye, France
| | - F Sturtz
- EA6309, Université de Limoges, Limoges, France; Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
| | - A S Lia
- EA6309, Université de Limoges, Limoges, France; Service de Biochimie et Génétique Moléculaire, Centre Hospitalier Universitaire de Limoges, Limoges, France
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Lerat J, Magdelaine C, Beauvais-Dzugan H, Espil C, Ghorab K, Latour P, Derouault P, Sturtz F, Lia AS. A novel pathogenic variant of NEFL responsible for deafness associated with peripheral neuropathy discovered through next-generation sequencing and review of the literature. J Peripher Nerv Syst 2019; 24:139-144. [PMID: 30734407 DOI: 10.1111/jns.12310] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 11/28/2018] [Revised: 01/30/2019] [Accepted: 02/01/2019] [Indexed: 11/29/2022]
Abstract
Neurofilaments are neuron-specific intermediate filaments essential for the radial growth of axons during development and the maintenance of axonal diameter. Pathogenic variants of Neurofilament Light (NEFL) are associated with CMT1F, CMT2E, and CMTDIG and have been observed in less than 1% of Charcot-Marie-Tooth (CMT) cases, resulting in the reporting of 35 variants in 173 CMT patients to date. However, only six variants have been reported in 17 patients with impaired hearing. No genotype-phenotype correlations have yet been established. Here, we report an additional case: a 69-year-old female, who originally presented with axonal sensory and motor neuropathy at the age of 45, associated with moderate sensorineural hearing loss, with a slight slope at high frequencies. Next-generation sequencing identified a novel pathogenic variant: c.269A > G, p.(Glu90Gly). Hearing impairment is often linked to CMT due to pathogenic variants of NEFL, especially p.(Glu90Lys) and p.(Asn98Ser), and in our case p.(Glu90Gly). These pathogenic variants are all located at hot spots, in the head domain and the two ends of the rod domain of the protein.
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Affiliation(s)
- Justine Lerat
- Univ. Limoges, MMNP, Limoges, France.,CHU Limoges, Service Oto-Rhino-Laryngologie et Chirurgie Cervico-Faciale, Limoges, France
| | - Corinne Magdelaine
- Univ. Limoges, MMNP, Limoges, France.,CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges, France
| | - Hélène Beauvais-Dzugan
- Univ. Limoges, MMNP, Limoges, France.,CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges, France
| | | | - Karima Ghorab
- Univ. Limoges, MMNP, Limoges, France.,CHU Limoges, Service Neurologie, Limoges, France
| | | | - Paco Derouault
- CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges, France
| | - Franck Sturtz
- Univ. Limoges, MMNP, Limoges, France.,CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges, France
| | - Anne-Sophie Lia
- Univ. Limoges, MMNP, Limoges, France.,CHU Limoges, Service Biochimie et Génétique Moléculaire, Limoges, France
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28
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Lerat J, Cintas P, Beauvais-Dzugan H, Magdelaine C, Sturtz F, Lia AS. A complex homozygous mutation in ABHD12 responsible for PHARC syndrome discovered with NGS and review of the literature. J Peripher Nerv Syst 2018; 22:77-84. [PMID: 28448692 DOI: 10.1111/jns.12216] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 03/01/2017] [Accepted: 03/03/2017] [Indexed: 01/09/2023]
Abstract
PHARC syndrome (MIM612674) is an autosomal recessive neurodegenerative pathology that leads to demyelinating Polyneuropathy, Hearing loss, cerebellar Ataxia, Retinitis pigmentosa, and early-onset Cataracts (PHARC). These various symptoms can appear at different ages. PHARC syndrome is caused by mutations in ABHD12 (α-β hydrolase domain 12), of which several have been described. We report here a new complex homozygous mutation c.379_385delAACTACTinsGATTCCTTATATACCATTGTAGTCTTACTGCTTTTGGTGAACACA (p.Asn127Aspfs*23). This mutation was detected in a 36-year-old man, who presented neuropathic symptoms from the age of 15, using a next-generation sequencing panel. This result suggests that the involvement of ABHD12 in polyneuropathies is possibly underestimated. We then performed a comparative study of other patients presenting ABHD12 mutations and searched for genotype-phenotype correlations and functional explanations in this heterogeneous population.
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Affiliation(s)
- Justine Lerat
- EA6309 - Neuropathies Périphériques et Maintenance Myélinique, Université de Limoges, Limoges, France.,Service Oto-Rhino-Laryngologie et Chirurgie Cervico-Faciale, CHU Dupuytren, Limoges, France
| | - Pascal Cintas
- Explorations Neurophysiologiques, Centre SLA, Centre de Référence de Pathologie Neuromusculaire, CHU Toulouse, Hôpital Pierre-Paul Riquet, Toulouse, France
| | - Hélène Beauvais-Dzugan
- EA6309 - Neuropathies Périphériques et Maintenance Myélinique, Université de Limoges, Limoges, France.,Laboratoire de Biochimie et Génétique Moléculaire, CHU Dupuytren, Limoges, France
| | - Corinne Magdelaine
- EA6309 - Neuropathies Périphériques et Maintenance Myélinique, Université de Limoges, Limoges, France.,Laboratoire de Biochimie et Génétique Moléculaire, CHU Dupuytren, Limoges, France
| | - Franck Sturtz
- EA6309 - Neuropathies Périphériques et Maintenance Myélinique, Université de Limoges, Limoges, France.,Laboratoire de Biochimie et Génétique Moléculaire, CHU Dupuytren, Limoges, France
| | - Anne-Sophie Lia
- EA6309 - Neuropathies Périphériques et Maintenance Myélinique, Université de Limoges, Limoges, France.,Laboratoire de Biochimie et Génétique Moléculaire, CHU Dupuytren, Limoges, France
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29
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Derouault P, Parfait B, Moulinas R, Barrot CC, Sturtz F, Merillou S, Lia AS. 'COV'COP' allows to detect CNVs responsible for inherited diseases among amplicons sequencing data. Bioinformatics 2018; 33:1586-1588. [PMID: 28137711 DOI: 10.1093/bioinformatics/btx017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 01/16/2017] [Indexed: 11/13/2022] Open
Abstract
Summary In order to help molecular geneticists to rapidly identify CNVs responsible for inherited diseases among amplicons sequencing data generated by NGS, we designed a user-friendly tool ' Cov'Cop '. Using the run's coverage file provided by the sequencer, Cov'Cop simultaneously analyzes all the patients of the run using a two-stage algorithm containing correction and normalization levels and provides an easily understandable output, showing with various colors, potentially deleted and duplicated amplicons. Availability and Implementation https://git.unilim.fr/merilp02/CovCop. Contact asliabaldini@unilim.fr. Supplementary information Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- P Derouault
- GEIST, Université de Limoges, Limoges, France
| | - B Parfait
- Génétique et Biologie Moléculaire, Hôpital Cochin, Paris, France
| | - R Moulinas
- GENOLIM, CHU de Limoges, Limoges, France
| | - C-C Barrot
- Biochimie et Génétique Moléculaire, CHU de Limoges, Limoges, France
| | - F Sturtz
- Biochimie et Génétique Moléculaire, CHU de Limoges, Limoges, France.,EA6309-GEIST, Université de Limoges, Limoges, France
| | - S Merillou
- UMR7252-XLIM, Université de Limoges, Limoges, France
| | - A-S Lia
- Biochimie et Génétique Moléculaire, CHU de Limoges, Limoges, France.,EA6309-GEIST, Université de Limoges, Limoges, France
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30
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Ballouhey Q, Richard L, Fourcade L, Ben Rhaiem I, Vallat JM, Sturtz F, Bourthoumieu S. Involvement of the enteroendocrine system in intestinal obstruction. PLoS One 2017; 12:e0186507. [PMID: 29091949 PMCID: PMC5665489 DOI: 10.1371/journal.pone.0186507] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 10/03/2017] [Indexed: 12/31/2022] Open
Abstract
INTRODUCTION Intestinal atresia, a rare congenital condition, is often associated with intestinal motility disorders despite adequate neonatal surgery. Previous studies have focused on changes in the enteric nervous system (ENS). We hypothesized that other components of the digestive tract could be involved in this condition. MATERIAL AND METHODS In a rat model of surgically-induced intestinal obstruction, a transcriptome analysis was performed to measure the global gene expression. Then, analyzes were focused on genes expressed in ENS and neuroendocrine cells. Rat fetus small intestines at different developmental stages (ED15, ED17, ED19 and ED21, (n = 22)) were studied as controls and compared to the upper and lower segments of small intestines from rat fetuses with surgically-induced obstruction (n = 14; ligature at ED18). The gene expression pattern was confirmed by immunohistochemistry, electron microscopy and RT-qPCR. RESULTS From ED15 to ED21, there was a physiological decrease in the gene expression of ENS markers and an increase in that of neuroendocrine genes. Regarding operated embryos, the changes in global gene expression were significantly higher in the proximal segment compared to the distal segment (18% vs. 9%). More precisely, a decrease in ENS gene expression and an increase in neuroendocrine gene expression were observed in the proximal segment compared to controls, indicating an accelerated maturation pattern. Immunohistochemistry and electron microscopy confirmed these findings. CONCLUSION Fetal intestinal obstruction seems to induce an accelerated maturation in the proximal segment. Moreover, neuroendocrine cells undergo significant unexpected changes, suggesting that ENS changes could be associated with other changes to induce intestinal motility disorders.
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Affiliation(s)
- Quentin Ballouhey
- EA6309 peripheral neuropathy, University of Medecine, Limoges, France
- Department of pediatric surgery, University Hospital, Limoges, France
- * E-mail: (QB); (SB)
| | - Laurence Richard
- EA6309 peripheral neuropathy, University of Medecine, Limoges, France
- Department of neurology, University Hospital, Limoges, France
| | - Laurent Fourcade
- EA6309 peripheral neuropathy, University of Medecine, Limoges, France
- Department of pediatric surgery, University Hospital, Limoges, France
| | - Ines Ben Rhaiem
- EA6309 peripheral neuropathy, University of Medecine, Limoges, France
| | - Jean Michel Vallat
- EA6309 peripheral neuropathy, University of Medecine, Limoges, France
- Department of neurology, University Hospital, Limoges, France
| | - Franck Sturtz
- EA6309 peripheral neuropathy, University of Medecine, Limoges, France
- Department of biochemistry and molecular genetic, University Hospital, Limoges, France
| | - Sylvie Bourthoumieu
- EA6309 peripheral neuropathy, University of Medecine, Limoges, France
- Department of histology, cytology and cytogenetic, University Hospital, Limoges, France
- * E-mail: (QB); (SB)
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31
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Bessaguet F, Danigo A, Magy L, Sturtz F, Desmoulière A, Demiot C. Candesartan prevents resiniferatoxin-induced sensory small-fiber neuropathy in mice by promoting angiotensin II-mediated AT2 receptor stimulation. Neuropharmacology 2017; 126:142-150. [PMID: 28882562 DOI: 10.1016/j.neuropharm.2017.08.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 05/24/2017] [Revised: 07/04/2017] [Accepted: 08/31/2017] [Indexed: 12/27/2022]
Abstract
Sensory defects associated with small-fiber neuropathy (SFN) can lead to profound disabilities. The relationship between the sensory nervous system and modulation of the renin-angiotensin system (RAS) has been described and focused on pain and neurodegeneration in several animal models. We have recently developed an experimental model of functional sensory neuropathy showing thermal hypoalgesia and neuropeptide depletion without nerve fiber degeneration. Here, we aimed to determine whether the modulation of angiotensin II (Ang II) activity could prevent sensory neuropathy induced by RTX. Control and RTX mice received ramipril, an Ang II converting enzyme (ACE) inhibitor, (0.5 mg/kg/day) or candesartan, an Ang II type 1 receptor (AT1R) blocker (0.5 mg/kg/day), one day before vehicle or RTX administration, and each day for the next seven days. Ramipril did not have a beneficial effect in RTX mice, whereas candesartan prevented thermal hypoalgesia and reduced neuropeptide depletion in intraepidermal nerve fibers and dorsal root ganglion neurons. The preventive effect of candesartan was not observed in mice deficient for the Ang II type 2 receptor (AT2R) and was counteracted in wild type mice by EMA200, an AT2R antagonist (3 mg/kg/day). Thus, candesartan may promote AT2R activation by blocking AT1R and increasing Ang II production and enhance its mechanisms of neuroprotection in our RTX model. Our finding that candesartan prevents nociception deficits and neuropeptide depletion encourages the evaluation of its therapeutic potential in patients presenting SFN, particularly those who experience chemotherapy-induced SFN.
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Affiliation(s)
- Flavien Bessaguet
- EA 6309 - Myelin Maintenance & Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
| | - Aurore Danigo
- EA 6309 - Myelin Maintenance & Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
| | - Laurent Magy
- Department of Neurology, Reference Center for Rare Peripheral Neuropathies, University Hospital of Limoges, Limoges, France
| | - Franck Sturtz
- EA 6309 - Myelin Maintenance & Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
| | - Alexis Desmoulière
- EA 6309 - Myelin Maintenance & Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France
| | - Claire Demiot
- EA 6309 - Myelin Maintenance & Peripheral Neuropathy, Faculties of Medicine and Pharmacy, University of Limoges, Limoges, France.
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32
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Mircher C, Cieuta-Walti C, Marey I, Rebillat AS, Cretu L, Milenko E, Conte M, Sturtz F, Rethore MO, Ravel A. Acute Regression in Young People with Down Syndrome. Brain Sci 2017; 7:brainsci7060057. [PMID: 28555009 PMCID: PMC5483630 DOI: 10.3390/brainsci7060057] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 05/19/2017] [Accepted: 05/24/2017] [Indexed: 12/21/2022] Open
Abstract
Abstract: Adolescents and young adults with Down syndrome (DS) can present a rapid regression with loss of independence and daily skills. Causes of regression are unknown and treatment is most of the time symptomatic. We did a retrospective cohort study of regression cases: patients were born between 1959 and 2000, and were followed from 1984 to now. We found 30 DS patients aged 11 to 30 years old with history of regression. Regression occurred regardless of the cognitive level (severe, moderate, or mild intellectual disability (ID)). Patients presented psychiatric symptoms (catatonia, depression, delusions, stereotypies, etc.), partial or total loss of independence in activities of daily living (dressing, toilet, meals, and continence), language impairment (silence, whispered voice, etc.), and loss of academic skills. All patients experienced severe emotional stress prior to regression, which may be considered the trigger. Partial or total recovery was observed for about 50% of them. In our cohort, girls were more frequently affected than boys (64%). Neurobiological hypotheses are discussed as well as preventative and therapeutic approaches.
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Affiliation(s)
| | | | | | | | - Laura Cretu
- Jérôme Lejeune Institute, Paris 75015, France.
| | | | | | | | | | - Aimé Ravel
- Jérôme Lejeune Institute, Paris 75015, France.
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33
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Vermuso L, Gueudry J, Sauvêtre G, Piton N, Guerrot AM, Sturtz F, Portmann A, Muraine M. [Isolated vitreous amyloidosis]. J Fr Ophtalmol 2017; 40:e7-e9. [PMID: 28065461 DOI: 10.1016/j.jfo.2016.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 03/31/2016] [Accepted: 04/04/2016] [Indexed: 11/27/2022]
Affiliation(s)
- L Vermuso
- Service d'ophtalmologie, hôpital Charles-Nicole, CHU de Rouen, 1 rue de Germont, 76031 Rouen cedex, France
| | - J Gueudry
- Service d'ophtalmologie, hôpital Charles-Nicole, CHU de Rouen, 1 rue de Germont, 76031 Rouen cedex, France.
| | - G Sauvêtre
- Service de médecine interne, hôpital Charles-Nicole, CHU de Rouen, 1 rue de Germont, 76031 Rouen cedex, France
| | - N Piton
- Service d'anatomocytopathologie, hôpital Charles-Nicole, CHU de Rouen, 1 rue de Germont, 76031 Rouen cedex, France
| | - A-M Guerrot
- Service de biochimie et de génétique, hôpital Charles-Nicole, CHU de Rouen, 1 rue de Germont, 76031 Rouen cedex, France
| | - F Sturtz
- Service de génétique moléculaire, hôpital Dupuytren, CHU de Limoges, 2, avenue Martin-Luther-King, 87042 Limoges cedex, France
| | - A Portmann
- Service d'ophtalmologie, hôpital Charles-Nicole, CHU de Rouen, 1 rue de Germont, 76031 Rouen cedex, France
| | - M Muraine
- Service d'ophtalmologie, hôpital Charles-Nicole, CHU de Rouen, 1 rue de Germont, 76031 Rouen cedex, France
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34
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Faye PA, Vedrenne N, De la Cruz-Morcillo MA, Barrot CC, Richard L, Bourthoumieu S, Sturtz F, Funalot B, Lia AS, Battu S. New Method for Sorting Endothelial and Neural Progenitors from Human Induced Pluripotent Stem Cells by Sedimentation Field Flow Fractionation. Anal Chem 2016; 88:6696-702. [PMID: 27263863 DOI: 10.1021/acs.analchem.6b00704] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Human induced pluripotent stem cells (hiPSc) are a very useful solution to create and observe the behavior of specific and usually inaccessible cells, such as human motor neurons. Obtained from a patient biopsy by reprograming dermal fibroblasts (DF), hiPSc present the same properties as embryonic stem cells and can generate any cell type after several weeks of differentiation. Today, there are numerus protocols which aim to control hiPSC differentiation. The principal challenge is to obtain a sufficiently enriched specific cell population to study disease pathophysiology and to provide a good model for further investigation and drug screening. The differentiation process is very costly and time-consuming, because many specific factors and different culture media must be used. In this study, we used Sedimentation Field Flow Fractionation (SdFFF) to prepare enriched populations derived from hiPSc after only 10 days of culture in a classical medium. Based on phenotypic and proteomic characterization, "hyperlayer" elution resulted in a fraction expressing markers of endothelial progenitors while another fraction expressed markers of neural progenitors. The isolation of subpopulations representing various differentiation lineages is of major interest for the production of specialized, cell-enriched fractions and in the preparation of increasingly complex models for the development of new therapeutic tools.
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Affiliation(s)
| | | | | | | | | | | | | | - Benoît Funalot
- Département de Génétique, CHU Henri-Mondor , F-94000 Créteil, France.,Inserm U955-E10, Université Paris-Est-Créteil, F-94000 Créteil, France
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35
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Jouaud M, Gonnaud PM, Richard L, Latour P, Ollagnon-Roman E, Sturtz F, Mathis S, Magy L, Vallat JM. Congenital hypomyelinating neuropathy due to the association of a truncating mutation in PMP22 with the classical HNPP deletion. Neuromuscul Disord 2016; 26:316-21. [DOI: 10.1016/j.nmd.2016.01.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 01/20/2016] [Accepted: 01/27/2016] [Indexed: 10/22/2022]
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36
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Danigo A, Magy L, Richard L, Sturtz F, Funalot B, Demiot C. A reversible functional sensory neuropathy model. Neurosci Lett 2014; 571:39-44. [PMID: 24792390 DOI: 10.1016/j.neulet.2014.04.026] [Citation(s) in RCA: 11] [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: 01/27/2014] [Revised: 04/07/2014] [Accepted: 04/19/2014] [Indexed: 11/26/2022]
Abstract
Small-fiber neuropathy was induced in young adult mice by intraperitoneal injection of resiniferatoxin (RTX), a TRPV1 agonist. At day 7, RTX induced significant thermal and mechanical hypoalgesia. At day 28, mechanical and thermal nociception were restored. No nerve degeneration in skin was observed and unmyelinated nerve fiber morphology and density in sciatic nerve were unchanged. At day 7, substance P (SP) was largely depleted in dorsal root ganglia (DRG) neurons, although calcitonin gene-related peptide (CGRP) was only moderately depleted. Three weeks after, SP and CGRP expression was restored in DRG neurons. At the same time, CGRP expression remained low in intraepidermal nerve fibers (IENFs) whereas SP expression had improved. In summary, RTX induced in our model a transient neuropeptide depletion in sensory neurons without nerve degeneration. We think this model is valuable as it brings the opportunity to study functional nerve changes in the very early phase of small fiber neuropathy. Moreover, it may represent a useful tool to study the mechanisms of action of therapeutic strategies to prevent sensory neuropathy of various origins.
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Affiliation(s)
- Aurore Danigo
- EA 6309 - Schools of Medicine and Pharmacy - University of Limoges, France
| | - Laurent Magy
- EA 6309 - Schools of Medicine and Pharmacy - University of Limoges, France; Service de Neurologie, Centre de référence national "neuropathies périphériques rares" - CHU Limoges, 87042 Limoges Cedex, France
| | - Laurence Richard
- EA 6309 - Schools of Medicine and Pharmacy - University of Limoges, France; Service de Neurologie, Centre de référence national "neuropathies périphériques rares" - CHU Limoges, 87042 Limoges Cedex, France
| | - Franck Sturtz
- EA 6309 - Schools of Medicine and Pharmacy - University of Limoges, France
| | - Benoît Funalot
- EA 6309 - Schools of Medicine and Pharmacy - University of Limoges, France; Service de Neurologie, Centre de référence national "neuropathies périphériques rares" - CHU Limoges, 87042 Limoges Cedex, France
| | - Claire Demiot
- EA 6309 - Schools of Medicine and Pharmacy - University of Limoges, France.
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37
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Lia-Baldini AS, Magdelaine C, Nizou A, Airault C, Salles JP, Moulin P, Delemer B, Aitouares M, Funalot B, Sturtz F, Lienhardt-Roussie A. Two novel mutations of the calcium-sensing receptor gene affecting the same amino acid position lead to opposite phenotypes and reveal the importance of p.N802 on receptor activity. Eur J Endocrinol 2013; 168:K27-34. [PMID: 23169696 DOI: 10.1530/eje-12-0714] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [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: 01/09/2023]
Abstract
OBJECTIVE Gain-of-function mutations of the calcium-sensing receptor (CASR) gene have been identified in patients with sporadic or familial autosomal dominant hypocalcemia (ADH). Inactivating mutations of the CASR gene cause familial hypocalciuric hypercalcemia (FHH). Here, we report two novel CASR mutations affecting the same amino acid (p.N802); one causes ADH and the other atypical FHH. PATIENTS AND METHODS The first patient, an 11-year-old girl suffering from hypocalcemia, developed nephrocalcinosis when she was only 5 years old. The second patient is a 30-year-old woman who presented with mild hypercalcemia. PCR amplification of CASR coding exons and direct sequencing of PCR products were used to identify mutations. Site-directed mutagenesis was used to generate mutated CASR cDNAs in an expression plasmid. Using the MAPK assay system and transient transfection of Cos-7 cells with wild-type (WT) and mutated CASR, we studied the responses of these mutated receptors to extracellular Ca(2+) and to the negative allosteric CASR modulator, NPS2143. RESULTS Two heterozygous missense mutations (p.N802I and p.N802S) affecting a residue in the sixth transmembrane domain of CASR were identified. In functional tests, the response of the p.N802S mutant to calcium was typical of an inactivating mutation. However, the p.N802I mutant had 70% of the maximally stimulated WT receptor activity even in the absence of extracellular calcium. This constitutive activity was only partially inhibited by the inhibitor, NPS2143. CONCLUSIONS The asparagine at amino acid position 802 appears to be essential for the activity of the CASR protein and is implicated in the mechanism of CASR signaling.
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Affiliation(s)
- Anne-Sophie Lia-Baldini
- EA 6309 - Maintenance Myélinique et Neuropathies Périphériques, Faculté de Médecine - Biochimie, Université de Limoges, 6ème étage, 2 rue du Dr Marcland, 87025 Limoges, France.
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38
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Lacroix A, Collot-Teixeira S, Mardivirin L, Jaccard A, Petit B, Piguet C, Sturtz F, Preux PM, Bordessoule D, Ranger-Rogez S. Involvement of human herpesvirus-6 variant B in classic Hodgkin's lymphoma via DR7 oncoprotein. Clin Cancer Res 2010; 16:4711-21. [PMID: 20858841 DOI: 10.1158/1078-0432.ccr-10-0470] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Hodgkin's lymphoma (HL) is associated with the presence of EBV in Reed-Sternberg (RS) cells in ∼40% of cases. Here, we studied the presence of human herpesvirus type 6 (HHV-6) variant B in RS cells of HL patients and correlated results with clinical parameters. We then examined the implication of HHV-6 DR7B protein in cell deregulation. EXPERIMENTAL DESIGN HHV-6 DR7B protein was produced in a Semliki Forest virus system. Polyclonal antibodies were then generated and used for immunochemical HHV-6 localization in HL biopsies. Binding between DR7B and p53 was studied using a double-hybrid system. Transactivation of NFκB was observed after transient transfection using reporter gene assays. We looked for Id2 factor expression after stable transfection of the BJAB cell line by reverse transcription-PCR and Western blot analysis. RESULTS HHV-6 was more common in nodular sclerosis subtype HL, and DR7B oncoprotein was detected in RS cells for 73.7% of EBV-negative patients. Colocalization of EBV and HHV-6 was observed in RS cells of doubly infected patients. DR7B protein bound to human p53 protein. p105-p50/p65 mRNA expression and activation of the NFκB complex were increased when DR7B was expressed. Stable expression of DR7B exhibited a strong and uniform expression of Id2. A slightly higher percentage of remission was observed in patients with RS cells testing positive for DR7B than in those testing negative. CONCLUSIONS Collectively, these data provide evidence for the implication of a novel agent, HHV-6, in cases of nodular sclerosis HL.
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Calvo J, Funalot B, Ouvrier RA, Lazaro L, Toutain A, De Mas P, Bouche P, Gilbert-Dussardier B, Arne-Bes MC, Carrière JP, Journel H, Minot-Myhie MC, Guillou C, Ghorab K, Magy L, Sturtz F, Vallat JM, Magdelaine C. Genotype-Phenotype Correlations in Charcot-Marie-Tooth Disease Type 2 Caused by Mitofusin 2 Mutations. ACTA ACUST UNITED AC 2009; 66:1511-6. [DOI: 10.1001/archneurol.2009.284] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Abstract
An abnormally elevated level of resting energy expenditure (REE, measured by indirect calorimetry) has been reported in a subset of patients with sporadic amyotrophic lateral sclerosis (SALS). Hypermetabolism (measured REE/calculated REE (cREE)> or =1.1, or 110%) has also been observed in transgenic mice harbouring ALS-causing mutations in the SOD1 gene. By contrast, the REE of patients with familial amyotrophic lateral sclerosis (FALS) has never been assessed. Our objective was to evaluate the metabolic and nutritional parameters of FALS patients and to compare them with those of SALS patients, and search for correlations with clinical parameters. Eleven patients with FALS (from 10 different families, none carrying a SOD1 mutation) were evaluated by indirect calorimetry in our centre. As a control group, we used a sample of 33 patients with SALS, matched for age and sex with the FALS patients. 11/11 (100%) patients with FALS were hypermetabolic, compared to 17/33 (52%) patients with SALS (p=0.009). Measured REE (mREE) and mREE/cREE (metabolic level) were significantly higher in FALS patients than in SALS patients (p=0.03 and p=0.0008, respectively). No correlation was found between metabolic measures and neurological or respiratory parameters. In conclusion, hypermetabolism appears to be a common feature of subjects with FALS, suggesting that this impairment of energy homeostasis may be genetically driven. The high metabolic level of FALS patients should be taken into account for their nutritional management (need for a high-energy diet to prevent malnutrition).
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Affiliation(s)
- Benoit Funalot
- Department of Neurology and ALS Regional Centre, Hôpital Universitaire Dupuytren, 2 av. Martin-Luther-King, Limoges Cedex, France.
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Funalot B, Magdelaine C, Sturtz F, Ouvrier R, Vallat JM. [Ultrastructural lesions of axonal mitochondria in patients with childhood-onset Charcot-Marie-Tooth disease due to MFN2 mutations]. Bull Acad Natl Med 2009; 193:151-161. [PMID: 19718987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We present neuropathological findings based on sural nerve biopsy in six children with mutations of the mitofusin 2 gene (MFN2). All six children had severe axonal neuropathies (mild or severe hereditary motor and sensory neuropathy, HMSN), with onset in early childhood. All had a marked decrease in the density of mainly large myelinated fibers. Although neurophysiological findings were suggestive of axonal degeneration, some onion bulbs were present in each case. Unequivocal mitochondrial changes were apparent only on longitudinal sections. Many axonal mitochondria appeared smaller than normal and round or spherical instead of tubular. These mitochondria were abnormally aggregated, accumulating primarily at the axon periphery. This peripheral distribution was clearest in residual large myelinated fibers. The inner and outer mitochondrial membranes were irregular, and the cristae were quite often disrupted. These changes were observed in both myelinated and unmyelinated fibers. Mitofusin 2 is a large mitochondrial transmembrane GTPase, with two coiled coil domains and two transmembrane spans. It is targeted to the outer mitochondrial membrane, where it interacts with mitofusin 1 to regulate the mitochondrial network architecture by stimulating mitochondrialfusion. The mitochondrial changes we observed could thus result from abnormal mitochondrial fusion and fission. Neuropathologic abnormalities can be sufficiently characteristic to suggest the genetic basis of some hereditary neuropathies such as those associated with mutations in MPZ, GJB1, GDAP1, MTMR2, SH3TC2, PRX, FGD4 and LMNA. This may also be true of MFN2-related neuropathies.
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Affiliation(s)
- Benoît Funalot
- Service de Neurologie et Centre de Référence des Neuropathies périphériques rares, CHU Dupuytren, Limoges, France
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Nicholson GA, Magdelaine C, Zhu D, Grew S, Ryan MM, Sturtz F, Vallat JM, Ouvrier RA. Severe early-onset axonal neuropathy with homozygous and compound heterozygous MFN2 mutations. Neurology 2008; 70:1678-81. [DOI: 10.1212/01.wnl.0000311275.89032.22] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objective: Severe early-onset axonal neuropathy (SEOAN) is a heterogeneous phenotype first delineated by Ouvrier et al., characterized by progressive axonal degeneration with gait problems often progressing to wheelchair requirement and later respiratory involvement. Most cases are sporadic single cases. Some have heterozygous mitofusin 2 (MFN2) mutations, many of which are de novo dominant mutations. The aim of this study was to investigate the mode of inheritance in three individuals with severe early-onset axonal neuropathy and homozygous or compound heterozygous MFN2 mutations.Methods: The clinical and molecular findings in the parents of three individuals with SEOAN with homozygous or compound heterozygous MFN2 mutations were examined.Results: All parents were asymptomatic or mildly symptomatic with some signs of peripheral neuropathy indicating a minimal phenotype. Two had hearing problems. All parents carried the relevant single base (heterozygous) MFN2 variations.Conclusion: Severe early-onset axonal neuropathy due to MFN2 mutations can present as an apparently recessively inherited neuropathy but the minimal phenotype in the parents suggests a semi-dominant mechanism.
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Vallat JM, Magy L, Richard L, Sturtz F, Couratier P. Contribution of electron microscopy to the study of neuropathies associated with an IgG monoclonal paraproteinemia. Micron 2008; 39:61-70. [PMID: 17291771 DOI: 10.1016/j.micron.2006.12.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [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: 12/20/2006] [Accepted: 12/21/2006] [Indexed: 11/18/2022]
Abstract
A typical monoclonal IgG dysglobulinemia whether benign (monoclonal gammopathy of undetermined significance, MGUS) or malignant can give rise to peripheral neuropathy by damaging nerves. At first, neurotoxicity of the chemotherapy if the patient is treated must be ruled out in such cases. Indeed, a variety of other mechanisms have been described: endoneurial deposits of immunoglobulin, infiltration of the immunoglobulin within myelin sheaths, POEMS syndrome, deposits of amyloid, chronic inflammatory demyelinating polyradiculoneuropathy and infiltration of malignant cells. Ultrastructural examination of a nerve biopsy can be decisive in combination with routine histological and immunopathological examinations. Characterization of the mechanism of the neuropathy in a dysglobulinemic context is important as it governs therapeutic options, which in certain cases are particularly beneficial.
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Affiliation(s)
- J M Vallat
- Department of Neurology, University Hospital, 2 Avenue Martin Luther King, 87042 Limoges Cedex, France.
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Desport JC, Funalot B, Sturtz F, Couratier P. P041 Le niveau d’hypermétabolisme dans les formes familiales de sclérose latérale amyotrophique est significativement plus élevé que dans les formes sporadiques. NUTR CLIN METAB 2007. [DOI: 10.1016/s0985-0562(07)78843-x] [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: 11/17/2022]
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Vallat JM, Magy L, Lagrange E, Sturtz F, Magdelaine C, Grid D, Tazir M. Diagnostic value of ultrastructural nerve examination in Charcot-Marie-Tooth disease: two CMT 1B cases with pseudo-recessive inheritance. Acta Neuropathol 2007; 113:443-9. [PMID: 17294201 DOI: 10.1007/s00401-007-0196-7] [Citation(s) in RCA: 16] [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: 11/16/2006] [Revised: 01/11/2007] [Accepted: 01/11/2007] [Indexed: 12/31/2022]
Abstract
We report two sporadic patients of CMT disease in different consanguineous families. The electrophysiological examination led to the diagnosis of a severe demyelinating neuropathy. The nerve biopsies exhibited numerous outfoldings of the myelin sheaths and onion-bulb proliferations. The consanguinity and the histological findings pointed to a diagnosis of CMT 4B. However, the detection of abnormal and regular widenings between the major dense lines of the myelin lamellae by electron microscopy led us to search for a P0 gene mutation. Two heterozygous mutations of this gene were identified: S63F and N131Y. Different aspects of uncompacted myelin lamellae have been described in some cases of P0 mutations and a few now appear to be quite specific to it. More than 30 genes are implicated in CMT and as mutation search is time- and money-consuming, we believe that in some selected patients ultrastructural examination of nerves, among other criteria, helps orientate the molecular diagnosis of CMT.
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Affiliation(s)
- Jean-Michel Vallat
- Department of Neurology et Centre National de Référence des Neuropathies Périphériques Rares, University Hospital, 2 Avenue Martin Luther King, 87042, Limoges Cedex, France.
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Gazaille V, Bertin F, Delage M, Decroisette C, Labrousse F, Sturtz F, Melloni B, Bonnaud F. 047 MRP1 and -3 protein expression in non-small cells carcinomas and survey. Rev Mal Respir 2006. [DOI: 10.1016/s0761-8425(06)71875-7] [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: 11/29/2022]
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Faucher K, Rabinovitch-Chable H, Cook-Moreau J, Barrière G, Sturtz F, Rigaud M. Overexpression of human GPX1 modifies Bax to Bcl-2 apoptotic ratio in human endothelial cells. Mol Cell Biochem 2005; 277:81-7. [PMID: 16132718 DOI: 10.1007/s11010-005-5075-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2004] [Accepted: 04/06/2005] [Indexed: 02/07/2023]
Abstract
As they scavenge reactive oxygen species, antioxidants were studied for their ability to interfere with apoptotic processes. However, their mechanisms of action remain unclear. In this study, we measured the expression of two Bcl-2 family members, Bax and Bcl-2, in a human endothelial like cell-line overexpressing the organic hydroperoxide-scavenging enzyme glutathione peroxidase (GPX1), in the absence of any apoptotic/oxidant stimulus. ECV304 were stably transfected with the GPX1 cDNA and used for quantification of Bax (pro-apoptotic) and Bcl-2 (antiapoptotic) mRNA and protein levels, by quantitative RT-PCR and Western-blot. We found that, compared to control cells, cells from a clone showing a 13.2 fold increase in GPX1 activity had unchanged mRNA or protein Bcl-2 levels but expressed 42.6% and 46.1% less Bax mRNA and Bax protein respectively. Subsequently to Bax decrease, the Bax/Bcl-2 ratio, reflecting the apoptotic state of the cells, was also lower in cells overexpressing GPX1. Noticeably, the mRNA and the protein level of the cell-cycle protein p53, known to activate Bax expression, was unchanged. Our study showed that overexpressing an antioxidant gene such as GPX1 in endothelial cells is able to change the basal mRNA and protein Bax levels without affecting those of p53 and Bcl-2. This phenomenon could be useful to antiatherogenic therapies which use antioxidants with the aim of protecting the vascular wall against oxidative stress injury.
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Affiliation(s)
- Karine Faucher
- School of Medicine, University of Limoges, EA3839, Molecular Medicine Laboratory, 2, Rue du Dr Marcland, 87025, Limoges Cedex, France.
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Gazaille V, Delage M, Bertin F, Decroisette C, Chable H, Fajac A, Sturtz F, Melloni B, Bonnaud F. 060 MRP1, -3 and -5 protein expression in non-small cells carcinomes and survey after adjuvant chemotherapy. Rev Mal Respir 2005. [DOI: 10.1016/s0761-8425(05)92472-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
Survival and development of tumors depends on nutritional and respiratory biological events and exchanges ensured by blood and lymph. Tumor proliferation is associated with an increase in the vascular networks either near the tumor or intra-tumorally. Tumor tissues are able to increase their provisionment according to their needs while directing and optimizing the development of peri-tumoral vessels. The production of growth factors stimulating neo-formation of lymphatic vessels by cancer cells constitutes one of the adaptations responsible for metastatic propagation. During tumor development the lymphatic system is considered in many cases of cancer as the primary means of metastasis dissemination. The study of the lymphatic system setting and ways to block it are important points to consider in oncology.
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Affiliation(s)
- Dany Leclers
- Médecine moléculaire humaine EA 3839, Faculté de Médecine, 2, Limoges, France.
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Bertin F, Gazaille V, Sturtz F, Laskar M, Melloni B. P-007 Vascular endothelial growth factor-A as a predicting factor of clinical outcome in non-small cell lung cancer. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80501-x] [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: 11/28/2022]
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