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Bergoin C, Dubourg J, Broussolle E, Souquet J, Boussel L, Boschetti G, Vial C, Bernard E, Chambrier C. P264: Influence de la gastrostomie sur le devenir des patients atteints d’une sclérose latérale amyotrophique. NUTR CLIN METAB 2014. [DOI: 10.1016/s0985-0562(14)70906-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Repetto GM, Guzmán ML, Delgado I, Loyola H, Palomares M, Lay-Son G, Vial C, Benavides F, Espinoza K, Alvarez P. Case fatality rate and associated factors in patients with 22q11 microdeletion syndrome: a retrospective cohort study. BMJ Open 2014; 4:e005041. [PMID: 25377008 PMCID: PMC4225234 DOI: 10.1136/bmjopen-2014-005041] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE Chromosome 22q11.2 deletion is the most commonly occurring known microdeletion syndrome. Deaths related to the syndrome have been reported, but the magnitude of death has not been quantified. This study evaluated the deletion's impact on survival and its clinical manifestations in a large cohort of Chilean patients. DESIGN Demographic and clinical data of individuals with 22q11 deletions diagnosed between 1998 and 2013 were collected from medical records and death certificates. Case fatality rate was calculated and compared with national vital statistics. OR with 95% CI analysis was used to assess the association between clinical manifestations and death. SETTING Genetic services in tertiary care centres in Chile, following patients with 22q11.2 deletion. OUTCOMES Fatality rate and associated factors. RESULTS 59 of 419 patients (14.1%) died during the study period at a median of 3.4 months (range 0 to 32 years of age). Factors associated with death included congenital heart disease (OR 5.27; 95% CI 2.06 to 13.99; p<0.0001), hypocalcaemia (OR 4.27; 95% CI 1.67 to 11.15; p<0.002) and airway malacia (OR 13.37; 95% CI 1.19 to 110.51; p<0.002). Patients with deletions and defects such as tetralogy of Fallot with or without pulmonary atraesia, truncus arteriosus or ventricular septal defect, had a 2.6-fold to 4.6-fold higher death rate compared with nationwide reports for the same types of defects. CONCLUSIONS In this cohort, we observed a death rate of 14.1%, implying that one in seven patients with 22q11 deletion died during the study period. Significant associations with cardiac defects, hypocalcaemia and airway malacia were observed. Furthermore, the death risk in patients with 22q11 deletion and cardiac defects exceeded the global figures observed in Chile for infants with structurally similar but apparently isolated anomalies. These observations indicate a need to identify patients who may require specific perioperative management to improve survival.
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Cornut-Chauvinc C, Jomir L, Roche C, Bouhour F, Vial C, Cintas P. P418: “Dynamic ENMG” using the collision technique. Application to explore activity-dependent conduction block in patients with chronic inflammatory demyelinating polyneuropathy (CIDP). Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50527-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Taylor KA, Wright JR, Vial C, Evans RJ, Mahaut-Smith MP. Amplification of human platelet activation by surface pannexin-1 channels. J Thromb Haemost 2014; 12:987-98. [PMID: 24655807 PMCID: PMC4238786 DOI: 10.1111/jth.12566] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 03/04/2014] [Indexed: 02/03/2023]
Abstract
BACKGROUND Pannexin-1 (Panx1) forms an anion-selective channel with a permeability up to ~1 kDa and represents a non-lytic, non-vesicular ATP release pathway in erythrocytes, leukocytes and neurons. Related connexin gap junction proteins have been reported in platelets; however, the expression and function of the pannexins remain unknown. OBJECTIVE To determine the expression and function of pannexins in human plate-lets, using molecular, cellular and functional techniques. METHODS Panx1 expression in human platelets was det-ermined using qPCR and antibody-based techniques. Contributions of Panx1 to agonist-evoked efflux of cytoplasmic calcein, Ca(2+) influx, ATP release and aggregation were assessed in washed platelets under conditions where the P2X1 receptor response was preserved (0.32 U mL(-1) apyrase). Thrombus formation in whole blood was assessed in vitro using a shear chamber assay. Two structurally unrelated and widely used Panx1 inhibitors, probenecid and carbenoxolone, were used throughout this study, at concentrations that do not affect connexin channels. RESULTS PANX1, but not PANX2 or PANX3, mRNA was detected in human platelets. Furthermore, Panx1 protein is glycosylated and present on the plasma membrane of platelets, and displays weak physical association with P2X1 receptors. Panx1 inhibition blocked thrombin-evoked efflux of calcein, and reduced Ca(2+) influx, ATP release, platelet aggregation and thrombus formation under arterial shear rates in vitro. The Panx1-dependent contribution was not additive to that of P2X1 receptors. CONCLUSIONS Panx1 is expressed on human platelets and amplifies Ca(2+) influx, ATP release and aggregation through the secondary activation of P2X1 receptors. We propose that Panx1 represents a novel target for the management of arterial thrombosis.
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Vial C, Svahn J, Gobert F, Hannoun-Levy D. Neuropathie motrice amyotrophiante proximale monomélique. Rev Neurol (Paris) 2014. [DOI: 10.1016/j.neurol.2014.01.493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Vial PA, Valdivieso F, Calvo M, Rioseco ML, Riquelme R, Araneda A, Tomicic V, Graf J, Paredes L, Florenzano M, Bidart T, Cuiza A, Marco C, Hjelle B, Ye C, Hanfelt-Goade D, Vial C, Rivera JC, Delgado I, Mertz GJ. A non-randomized multicentre trial of human immune plasma for treatment of hantavirus cardiopulmonary syndrome by ANDV. Antivir Ther 2014; 20:377-86. [DOI: 10.3851/imp2875] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/12/2014] [Indexed: 10/24/2022]
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Devic P, Petiot P, Simonet T, Stojkovic T, Delmont E, Franques J, Magot A, Vial C, Lagrange E, Nicot AS, Risson V, Eymard B, Schaeffer L. Antibodies to clustered acetylcholine receptor: expanding the phenotype. Eur J Neurol 2013; 21:130-4. [PMID: 24112557 DOI: 10.1111/ene.12270] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Accepted: 08/23/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND PURPOSE To provide a detailed phenotypical description of seronegative patients with generalized myasthenia gravis and antibodies to clustered acetylcholine receptors (AChRs) and to assess their frequency amongst a French seronegative generalized myasthenia gravis (SNMG) population. METHODS A French SNMG database was created and the sera from the 37 patients included in it were analysed by immunofluorescence of cell-based assays using cotransfection of AChR subunit genes together with rapsyn to densely cluster the AChRs. RESULTS Sixteen per cent (n = 6) of the SNMG patients were found to have antibodies to clustered AChR. They presented either with early onset MG and thymic hyperplasia, late onset MG and thymic involution, or thymoma associated MG. They responded well to cholinesterase inhibitors and immunosuppressants. CONCLUSIONS Patients with antibodies to clustered AChR account for a significant proportion of SNMG patients and resemble patients with AChR antibodies detected by standard radio-immunoprecipitation.
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Quesnel L, Vandenberghe N, Svahn J, Bouhour F, Broussolle E, Vial C. Détection comparative des fasciculations par échographie musculaire et électromyographie de surface chez des patients SLA. Rev Neurol (Paris) 2013. [DOI: 10.1016/j.neurol.2013.01.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lebedel N, Tilikete C, Anheim M, Jardel C, Vial C. Hypersignal T2 des olives bulbaires à l’imagerie par résonance magnétique dans un forme familiale d’ataxie cérébelleuse par mutation POLG. Rev Neurol (Paris) 2013. [DOI: 10.1016/j.neurol.2013.01.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Svahn J, Choumert A, Vandenberghe N, Gervais-Bernard H, Bouhour F, Broussolle E, Vial C. Diagnostics de sclérose latérale amyotrophique (SLA) par excès : expérience du centre SLA de Lyon à propos de 18 patients. Rev Neurol (Paris) 2013. [DOI: 10.1016/j.neurol.2013.01.134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Rebour R, Delporte L, Revol P, Arsenault L, Vial C, Luauté J, Rossetti Y. Déviation postérieur du centre de masse chez une patiente dystonique dopa-sensible : influences sur la marche. Neurophysiol Clin 2012. [DOI: 10.1016/j.neucli.2012.09.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Gachet C, Hechler B, Léon C, Vial C, Ohlmann P, Cazenave JP. Purinergic receptors on blood platelets. Platelets 2012; 7:261-7. [PMID: 21043660 DOI: 10.3109/09537109609023587] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Extracellular adenine nucleotides interact with P2 purinergic receptors to regulate a broad range of physiological processes among which platelet aggregation P2 purinoceptors were divided into two main groups: the G-protein coupled receptor or 'metabotropic' superfamily termed P2Y and the ligand-gated ion channel or 'ionotropic receptor' superfamily termed P2X. Platelet aggregation by ADP plays a key role in the development and extension of arterial thrombosis. At present, despite a great deal of investigation aimed at assessing the central role of ADP in haemostasis, the platelet ADP receptor or so-called P(2T) purinoceptor remains basically unknown. Attempts to achieve its cloning have to date been unsuccessful and in addition more than one purinoceptor would appear to be involved in the multiple effects of ADP on platelets. The aim of this review is to try to begin to find an initial answer to the questions of how do platelets respond to ADP and what receptors are involved in these processes. A model of at least two receptors, one responsible for rapid Ca(2+) entry which could be a P(2×1) receptor and one responsible for aggregation and inhibition of adenylyl cyclase which could be a P(2Y1) receptor is proposed.
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Rollán A, Vial C, Quesada S, Espinoza K, Hatton M, Puga A, Repetto G. Diagnóstico de intolerancia a la lactosa en adultos: rendimiento comparativo de la clínica, test de hidrógeno espirado y test genético. Rev Med Chil 2012; 140:1101-8. [PMID: 23354630 DOI: 10.4067/s0034-98872012000900001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Accepted: 05/23/2012] [Indexed: 11/17/2022]
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Villay A, Lakkis de Filippis F, Picton L, Le Cerf D, Vial C, Michaud P. Comparison of polysaccharide degradations by dynamic high-pressure homogenization. Food Hydrocoll 2012. [DOI: 10.1016/j.foodhyd.2011.10.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Sacconi S, JFL Lemmers R, Van Der Greef J, Vial C, Bouhour F, Van Der Maarel S, Desnuelle C. Actualités physiopathologiques dans la dystrophie musculaire facio-scapulo-humerale : rôle majeur de la clinique dans les avancées de la recherche. Rev Neurol (Paris) 2012. [DOI: 10.1016/j.neurol.2012.01.512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Poisson A, Krack P, Thobois S, Loiraud C, Serra G, Vial C, Broussolle E. History of the ‘geste antagoniste’ sign in cervical dystonia. J Neurol 2012; 259:1580-4. [DOI: 10.1007/s00415-011-6380-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Revised: 12/07/2011] [Accepted: 12/13/2011] [Indexed: 12/01/2022]
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Have L, Tell L, Gardie Y, Vial C, Rode G. Original observation after a cervico-occipital disjunction: Gerhardt syndrome associated with Riegel syndrome. Ann Phys Rehabil Med 2011. [DOI: 10.1016/j.rehab.2011.07.861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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68
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Have L, Tell L, Gardie Y, Vial C, Rode G. Observation originale après disjonction cervico-occipitale : un syndrome de Gerhardt associé à un syndrome de Riegel. Ann Phys Rehabil Med 2011. [DOI: 10.1016/j.rehab.2011.07.859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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69
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Nicorescu I, Vial C, Talansier E, Lechevalier V, Loisel C, Della Valle D, Riaublanc A, Djelveh G, Legrand J. Comparative effect of thermal treatment on the physicochemical properties of whey and egg white protein foams. Food Hydrocoll 2011. [DOI: 10.1016/j.foodhyd.2010.09.020] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Vial C, Gutiérrez J, Santander C, Cabrera D, Brandan E. Decorin interacts with connective tissue growth factor (CTGF)/CCN2 by LRR12 inhibiting its biological activity. J Biol Chem 2011; 286:24242-52. [PMID: 21454550 DOI: 10.1074/jbc.m110.189365] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Fibrotic disorders are the end point of many chronic diseases in different tissues, where an accumulation of the extracellular matrix occurs, mainly because of the action of the connective tissue growth factor (CTGF/CCN2). Little is known about how this growth factor activity is regulated. We found that decorin null myoblasts are more sensitive to CTGF than wild type myoblasts, as evaluated by the accumulation of fibronectin or collagen III. Decorin added exogenously negatively regulated CTGF pro-fibrotic activity and the induction of actin stress fibers. Using co-immunoprecipitation and in vitro interaction assays, decorin and CTGF were shown to interact in a saturable manner with a K(d) of 4.4 nM. This interaction requires the core protein of decorin. Experiments using the deletion mutant decorin indicated that the leucine-rich repeats (LRR) 10-12 are important for the interaction with CTGF and the negative regulation of the cytokine activity, moreover, a peptide derived from the LRR12 was able to inhibit CTGF-decorin complex formation and CTGF activity. Finally, we showed that CTGF specifically induced the synthesis of decorin, suggesting a mechanism of autoregulation. These results suggest that decorin interacts with CTGF and regulates its biological activity.
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Sereda MJ, Bradding P, Vial C. P182 Adenosine potentiates human mast cell fibrinolytic activity. Thorax 2010. [DOI: 10.1136/thx.2010.151043.33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Cabello-Verrugio C, Córdova G, Vial C, Zúñiga LM, Brandan E. Connective tissue growth factor induction by lysophosphatidic acid requires transactivation of transforming growth factor type β receptors and the JNK pathway. Cell Signal 2010; 23:449-57. [PMID: 20965247 DOI: 10.1016/j.cellsig.2010.10.019] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Revised: 10/06/2010] [Accepted: 10/11/2010] [Indexed: 02/06/2023]
Abstract
Transforming growth factor β (TGF-β) is a very strong pro-fibrotic factor which mediates its action, at least in part, through the expression of connective tissue growth factor (CTGF/CCN2). Along with these cytokines, the involvement of phospholipids in wound healing and the development of fibrosis has been revealed. Among them, lysophosphatidic acid (LPA) is a novel, potent regulator of wound healing and fibrosis that has diverse effects on many types of cells. We decided to evaluate the effect of LPA together with TGF-β on CTGF expression. We found that myoblasts treated with LPA and TGF-β1 produced an additive effect on CTGF expression. In the absence of TGF-β, the induction of CTGF expression by LPA was abolished by a dominant negative form of the TGF-β receptor type II (TGF-βRII) and by the use of SB 431542, a specific inhibitor of the serine/threonine kinase activity of TGF-βRI, suggesting that CTGF induction is dependent on LPA and requires active TGF-βRs. Moreover, we show that LPA requires Smad-2/3 proteins for the induction of CTGF expression, but not their phosphorylation or their nuclear translocation. The requirement of TGF-βRI for LPA mediated-effects is differential, since treatment of myoblasts with LPA in the presence of SB 431542 abolished the induction of stress fibers but not the induction of proliferation. Finally, we demonstrated that CTGF induction in response to LPA requires the activation of JNK, but not ERK, signaling pathways. The JNK requirement is independent of TGF-βRI-mediated activity. These novel results for the mechanism of action of LPA and TGF-β are important for understanding the role of pro-fibrotic growth factors and phospholipids involved in wound healing and related diseases.
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Nicorescu I, Vial C, Loisel C, Riaublanc A, Djelveh G, Cuvelier G, Legrand J. Influence of protein heat treatment on the continuous production of food foams. Food Res Int 2010. [DOI: 10.1016/j.foodres.2010.03.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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74
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Latour P, Vial C. Diagnostic moléculaire des formes axonales de la maladie de Charcot-Marie-Tooth. Rev Neurol (Paris) 2009; 165:1122-6. [DOI: 10.1016/j.neurol.2009.10.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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75
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Djian C, Lupo C, Billard M, Bouhour F, Vial C, Aulagner G. Bilan de l’évaluation du bon usage des immunoglobulines humaines normales i.v. en neurologie et en cardiologie au CHU de Lyon depuis 2004. Rev Epidemiol Sante Publique 2009. [DOI: 10.1016/j.respe.2009.07.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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