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Castro-Rodriguez JA, Jakubson L, Padilla O, Gallegos D, Fasce R, Bertrand P, Sanchez I, Perret C. Many respiratory viruses have temporal association with meningococcal disease. Allergol Immunopathol (Madr) 2015; 43:487-92. [PMID: 25456529 DOI: 10.1016/j.aller.2014.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 07/23/2014] [Indexed: 11/17/2022]
Abstract
BACKGROUND Previous ecological studies have shown a temporal and spatial association between influenza epidemics and meningococcal disease (MNG); however, none have examined more than two respiratory viruses. METHODS Data were obtained in Chile between 2000 and 2005 on confirmed cases of MNG and all confirmed cases of respiratory viruses (influenza A and B; parainfluenza; adenovirus; and respiratory syncytial virus [RSV]). Both variables were divided by epidemiological weeks, age range, and regions. Models of transference functions were run for rates of MNG. RESULTS In this period, 1022 reported cases of MNG and 34,737 cases of respiratory virus were identified (25,137 RSV; 4300 parainfluenza; 2527 influenza-A; 356 influenza-B; and 2417 adenovirus). RSV was the major independent virus temporally associated to MNG (it appears one week before MNG), followed by parainfluenza, influenza-B, adenovirus, and influenza-A. CONCLUSIONS The rate of MNG in Chile is temporally associated to all of the respiratory viruses studied, but with variability according age range, and regions.
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Flueck JL, Lienert M, Schaufelberger F, Perret C. Reliability of a 3-min all-out Arm Crank Ergometer Exercise Test. Int J Sports Med 2015; 36:809-13. [PMID: 26038881 DOI: 10.1055/s-0035-1548811] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The 3-min all-out test is a well-established exercise test developed for cycling ergometry. However, no such test exists in arm cranking. Thus the aim of this study was to investigate the test-retest reliability of a 3-min all-out exercise test on an arm crank ergometer. 21 healthy participants (9 male and 12 female, age 34±11 years, body mass 69.6±11.1 kg and height 175.5±6.9 cm) twice performed a 3-min all-out exercise test on an arm crank ergometer separated by 7 days. Peak power (PP), mean power (MP), fatigue index (FI), time to peak (TTP) and total work (TW) were assessed to detect test-retest reliability. PP, MP, FI and TW showed an excellent intra-class correlation coefficient (ICC) ranging from 0.940 to 0.984. Only TTP showed very low reliability with an ICC of 0.379. The results from this test-retest analysis showed that all parameters except the TTP were highly reliable in a 3-min all-out exercise test on an arm crank ergometer in able-bodied participants.
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Guillet A, Connault J, Perrot P, Perret C, Herbreteau D, Berton M, Caron V, Aubert H, Stalder JF, Maruani A, Barbarot S. Early symptoms and long-term clinical outcomes of distal limb's cutaneous arterio-venous malformations: a retrospective multicentre study of 19 adult patients. J Eur Acad Dermatol Venereol 2015; 30:36-40. [PMID: 25631621 DOI: 10.1111/jdv.12961] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 12/09/2014] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Cutaneous arterio-venous malformations (AVM) are high-flow vascular malformations made up of a direct link between arteries and veins without intermediary capillary space. 'Distal limb's AVM', which mean involving hands or feet, are rare and their functional prognosis is often poor. Little is known about their early clinical symptoms. The objectives of this study were to identify early clinical symptoms of distal limb's cutaneous AVMs and to determine their long-term clinical outcome. METHODS A retrospective study was carried out including adult patients who had distal limb's AVM, who were followed up between January 2000 and November 2013 in two regional tertiary care centres. The information was collected from patients' clinical records and completed by a structured telephone questionnaire. RESULTS Nineteen patients were included in the study: four (21%) with foot AVM and 15 (79%) with hand AVM. The first clinical symptoms were as follows: swelling (47%), pain (47%), one or several venous dilatations (37%) and rarely abnormal skin colour, hyperthermia and pulsating sensation. The median diagnosis delay was 9 years after the onset of first manifestations. Amongst the 17 patients who underwent a treatment, 53% had embolotherapy session(s), 12% surgery and 35% had both. After an average follow-up of 57.6 months, 31% of the 13 patients contacted who were receiving treatment were in complete remission; 31% had partial remission; 15% had relapse after initial improvement and 23% had treatment failure. Overall, 74% of patients had a serious development of the AVM: 37% had digital or hand amputation, and 42% remained symptomatic and/or unstable. CONCLUSION This study suggests that initial manifestations of distal limb's AVMs are discreet and non-specific, leading to a diagnosis delay of about 10 years, with poor prognosis. Doctors should evoke the diagnosis earlier, when these symptoms are shown: pain and/or swelling, sometimes with a large vein.
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Bertrand A, Perret C, Rubio A, Lopez Perrin K, Destombes S, Chambon F, Chastagner P, Oudot C, Marec-Bérard P. P259: Étude FNOP – Recherche de facteurs de risque nutritionnels en onco-hématologie pédiatrique. NUTR CLIN METAB 2014. [DOI: 10.1016/s0985-0562(14)70901-x] [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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Guillet A, Maruani A, Berton M, Herbreteau P, Perret C, Connault J, Perrot P, Aubert H, Caron V, Stalder JF, Barbarot S. Signes cliniques précoces et pronostic à long terme des malformations artério-veineuses cutanées distales de membre : étude rétrospective multicentrique de 19 patients. Ann Dermatol Venereol 2014. [DOI: 10.1016/j.annder.2014.09.164] [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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Acquadro C, Perret C, Arnould B. Pro Claims In Orphan Medicines Approved By the European Medicines Agency (Ema) for the Treatment of Lymphoproliferative Disorders. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2014; 17:A536. [PMID: 27201714 DOI: 10.1016/j.jval.2014.08.1714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Davoust B, Mediannikov O, Roqueplo C, Perret C, Demoncheaux JP, Sambou M, Guillot J, Blaga R. Enquête de séroprévalence de la toxoplasmose animale au Sénégal. ACTA ACUST UNITED AC 2014; 108:73-7. [DOI: 10.1007/s13149-014-0403-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 07/22/2014] [Indexed: 10/24/2022]
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Dahmani R, Just PA, Delay A, Canal F, Finzi L, Prip-Buus C, Lambert M, Sujobert P, Buchet-Poyau K, Miller E, Cavard C, Marmier S, Terris B, Billaud M, Perret C. A novel LKB1 isoform enhances AMPK metabolic activity and displays oncogenic properties. Oncogene 2014; 34:2337-46. [PMID: 24998845 DOI: 10.1038/onc.2014.182] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Revised: 04/28/2014] [Accepted: 05/16/2014] [Indexed: 12/13/2022]
Abstract
The LKB1 tumor suppressor gene encodes a master kinase that coordinates the regulation of energetic metabolism and cell polarity. We now report the identification of a novel isoform of LKB1 (named ΔN-LKB1) that is generated through alternative transcription and internal initiation of translation of the LKB1 mRNA. The ΔN-LKB1 protein lacks the N-terminal region and a portion of the kinase domain. Although ΔN-LKB1 is catalytically inactive, it potentiates the stimulating effect of LKB1 on the AMP-activated protein kinase (AMPK) metabolic sensor through a direct interaction with the regulatory autoinhibitory domain of AMPK. In contrast, ΔN-LKB1 negatively interferes with the LKB1 polarizing activity. Finally, combining in vitro and in vivo approaches, we showed that ΔN-LKB1 has an intrinsic oncogenic property. ΔN-LKB1 is expressed solely in the lung cancer cell line, NCI-H460. Silencing of ΔN-LKB1 decreased the survival of NCI-H460 cells and inhibited their tumorigenicity when engrafted in nude mice. In conclusion, we have identified a novel LKB1 isoform that enhances the LKB1-controlled AMPK metabolic activity but inhibits LKB1-induced polarizing activity. Both the LKB1 tumor suppressor gene and the oncogene ΔN-LKB1 are expressed from the same locus and this may account for some of the paradoxical effects of LKB1 during tumorigenesis.
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Badaoui R, Thiel V, Perret C, Popov I, Dupont H. [Bilateral pneumothorax, cervicofacial and mediastinal emphysema after surgical tracheostomy]. ACTA ACUST UNITED AC 2013; 32:718-20. [PMID: 24035217 DOI: 10.1016/j.annfar.2013.07.815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 07/15/2013] [Indexed: 10/26/2022]
Abstract
Tracheotomy is a surgical procedure for various indications, such as ventilator dependence and airway obstruction. Reported rates in the literature of complications of tracheostomy vary widely. We report an unusual presentation of serious complication after surgical tracheostomy. The correct timing of tracheostomy is still controversial in the literature. A 74-year-old male had emergency surgical tracheostomy under general anesthesia. At the end of the procedure, in recovery room, he developed subcutaneous emphysema of the eyes. There was no pneumothorax seen on chest X-ray. Bronchoscopic examination through the tracheostomy tube showed no evidence of damage to the posterior tracheal wall. Three hours later patient had difficulty breathing requiring sedation with respiratory assistance. X-ray of the chest at this stage showed a right pneumothorax and extensive subcutaneous emphysema of the chest wall. Pneumothorax was managed using a chest tube. Two days after, a control CT scan of the chest showed a left pneumothorax and pneumomediastinum. The pneumothorax was managed using a chest tube. Bronchoscopic examination showed no obvious lesion in the tracheobronchial tree. The patient was treated successfully with supportive care and large doses of antibiotic to prevent mediastinitis. Seven days later, recovery was rapid and complete and CT scan of the chest was completely normal. The patient was discharged from the hospital on the 13th postoperative day. This case illustrates that complications occurring after surgical tracheostomy could be dramatic. Management of tracheotomy is important to prevent complications. There is still debate on optimal timing of tracheotomy. The last three trials have shown no interest to perform an early tracheotomy, neither in terms of vital prognosis nor in terms of the duration of mechanical ventilation.
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Guillet A, Aubert H, Tessier MH, David A, Perret C, Penhoat M, Stalder JF, Barbarot S. Syndrome CLOVES (Congenital Lipomatous Overgrowth, Vascular Malformation, Epidermal Nævi) de diagnostic tardif. Ann Dermatol Venereol 2012. [DOI: 10.1016/j.annder.2012.10.190] [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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Vildy S, Aubert H, Barbarot S, Boussicault G, Perret C, Stalder JF. Hémorragie grave sur ulcération : une complication rare des hémangiomes congénitaux rapidement involutifs (RICH). Ann Dermatol Venereol 2012. [DOI: 10.1016/j.annder.2012.10.183] [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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Coulouarn C, Cavard C, Rubbia Brandt L, Audebourg A, Dumont F, Just PA, Jacques S, Clément B, Gilgenkrantz H, Perret C, Terris B. Cholangiocarcinomes intrahépatiques : une entité en cours de démembrement. Ann Pathol 2012. [DOI: 10.1016/j.annpat.2012.09.180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Labruyère R, Perret C. The level of lactic acidosis affects lactate minimum in a heart rate-based lactate minimum test. Int J Sports Med 2012; 33:898-902. [PMID: 22791618 DOI: 10.1055/s-0032-1311592] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The aim was to investigate whether the level of lactic acidosis in the first part of a heart rate-based lactate minimum test affects the lactate minimum heart rate and performance. We tested 15 men (age: 31 ± 6 years, height: 179 ± 6 cm, body mass: 75.6 ± 7.6 kg and V˙O(2peak) 50.3 ± 10.0 ml · min (- 1) · kg( - 1)). They all completed 2 lactate minimum tests following 2 different protocols during the first part of the test, i. e., i) a maximal test until exhaustion to provoke extensive lactacidaemia and ii) a submaximal test abandoned 3 stages earlier than the maximal test to provoke significantly lower but still considerable lactacidaemia. The second part of the lactate minimum test was identical for both runs. It consisted of a heart rate-based incremental test to determine the lactate minimum and the corresponding lactate minimum heart rate and performance. Results showed a significantly higher maximal blood lactate concentration at the end of the maximal test compared to the submaximal test (9.7 ± 2.7 vs. 6.0 ± 2.0 mmol · l( - 1), P<0.001). Also mean lactate minimum heart rate (160 ± 12 vs. 144 ± 13 bpm, P<0.001) and performance (200 ± 40 vs. 170 ± 35 W, P<0.001) were significantly higher after the maximal test compared to the submaximal test. We conclude that the first part of the heart rate-based lactate minimum test needs to be performed until exhaustion to receive reliable and meaningful results.
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Lorne E, Nuzzo D, Suzanne S, Walczak KA, Perret C, Laigle C, Mattei N, Dimov E, Petiot S, Godart J, Pila C, Verdier MC, Chourbagi C, Diouf M, Friggeri A, Mahjoub Y, Dupont H. [Storage at room temperature does not change cisatracurium onset time: a prospective, randomized, double-blind controlled study]. ACTA ACUST UNITED AC 2012; 31:783-7. [PMID: 22784474 DOI: 10.1016/j.annfar.2012.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 05/14/2012] [Indexed: 10/28/2022]
Abstract
OBJECTIVE Storage of cisatracurium at room temperature seems to have no effect on its degradation in vitro contrary to the recommendations of storage at +4°C. The purpose of this study was to evaluate the influence of cisatracurium' s storage temperature on its onset time. STUDY DESIGN Prospective, randomized, double-blind trial study. PATIENTS AND METHODS Thirty patients were enrolled. The control group consisted of 15 patients receiving cisatracurium (0.15mg/kg) stored at room temperature and the intervention consisted of 15 patients receiving cisatracurium (0.15mg/kg) stored at +4°C. The primary endpoint was to compare cisatracurium onset time depending on the storage temperature. RESULTS Cisatracurium onset time was 235 (180-292) seconds in the "room temperature" group vs. 240 (210-292) seconds in the "refrigerated" group. There was no difference between the onset of cisatracurium depending on the temperature of storage (p=0.51). Subgroups analysis in the "room temperature" group did not show any difference in cisatracurium onset depending on whether it was stored at room temperature for one, two or three weeks. Excellent intubation score was obtained for 100% of the patients. CONCLUSION This study demonstrated that cisatracurium's storage at room temperature had no influence on its onset time. It provides an argument for the preservation of cisatracurium at room temperature for a period not exceeding 21 days. Monitoring the onset of curarization may increase the quality score of intubation.
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Romagnolo B, Perret C. Modèles murins de léiomyomes utérins obtenus par oncogenèse ciblée. Med Sci (Paris) 2012. [DOI: 10.4267/10608/632] [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] Open
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Murray J, Braly E, Head H, Donahue D, Rush S, Stence N, Liu A, Kleinhenz J, Bison B, Pietsch T, von Hoff K, von Bueren A, Rutkowski S, Warmuth-Metz M, Jaspan T, Brisse H, Potepan P, Warmuth-Metz M, Berg F, Bison B, Pietsch T, Gerber N, Rutkowski S, Warmuth-Metz M, Sugiyama K, Kurisu K, Kajiwara Y, Takayasu T, Saito T, Hanaya R, Yamasaki F, Vicente J, Fuster-Garcia E, Tortajada S, Garcia-Gomez JM, Davies N, Natarajan K, Wilson M, Grundy RG, Wesseling P, Monleon D, Celda B, Robles M, Peet AC, Perret C, Boltshauser E, Scheer I, Kellenberger C, Grotzer M, Steffen-Smith E, Venzon D, Bent R, Baker E, Shandilya S, Warren K, Shih CS, West J, Ho C, Porter D, Wang Y, Saykin A, McDonald B, Arfanakis K, Warren K, Vezina G, Hargrave D, Poussaint TY, Goldman S, Packer R, Wen P, Pollack I, Zurakowski D, Kun L, Prados M, Kieran M, Eckel L, Keating G, Giannini C, Wetjen N, Patton A, Steffen-Smith E, Sarlls J, Pierpaoli C, Walker L, Venzon D, Bent R, Warren K, Perreault S, Lober R, Yeom K, Carret AS, Vogel H, Partap S, Fisher P, Gill SK, Wilson M, Davies NP, MacPherson L, Arvanitis TN, Peet AC, Davies N, Gill S, Wilson M, MacPherson L, Arvanitis T, Peet A, Hayes L, Jones R, Mazewski C, Aguilera D, Palasis S, Bendel A, Patterson R, Petronio J, Meijer L, Jaspan T, Grundy RGG, Walker DA, Robison N, Grant F, Treves ST, Bandopadhayay P, Manley P, Chi S, Zimmerman MA, Chordas C, Goumnerova L, Smith E, Scott M, Ullrich NJ, Poussaint T, Kieran M, Yang JC, Lightner DD, Khakoo Y, Wolden SL, Smee R, Zhao C, Spencer-Trotter B, Hallock A, Konski A, Bhambani K, Mahajan A, Jones J, Ketonen L, Paulino A, Ater J, Grosshans D, Dauser R, Weinberg J, Chintagumpala M, Dvir R, Elhasid R, Corn B, Tempelhoff H, Matceyevsky D, Makrin V, Shtraus N, Yavetz D, Constantini S, Gez E, Yu ES, Kim YJ, Park HJ, Kim HJ, Shin SH, Kim JH, Kim JY, Lee YK, Fiore MR, Sanne C, Mandeville HC, Saran FH, Greenspoon J, Duckworth J, Singh S, Scheinemann K, Whitton A, Gauvain K, Geller T, Elbabaa S, Dombrowski J, Wong K, Olch A, Davidson TB, Venkatramani R, Haley K, Zaky W, Dhall G, Finlay J, Bishop MW, Hummel TR, Leach J, Minturn J, Breneman J, Stevenson C, Wagner L, Sutton M, Miles L, Fouladi M, Goldman S. RADIOLOGY. Neuro Oncol 2012. [DOI: 10.1093/neuonc/nos107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Berry H, Kakebeeke T, Donaldson N, Perret C, Hunt K. Energetics of paraplegic cycling: Adaptations to 12 months of high volume training. Technol Health Care 2012; 20:73-84. [DOI: 10.3233/thc-2011-0656] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Latouche C, El Moghrabi S, Messaoudi S, Nguyen Dinh Cat A, Hernandez-Diaz I, Alvarez de la Rosa D, Perret C, López Andrés N, Rossignol P, Zannad F, Farman N, Jaisser F. Neutrophil gelatinase-associated lipocalin is a novel mineralocorticoid target in the cardiovascular system. Hypertension 2012; 59:966-72. [PMID: 22469622 DOI: 10.1161/hypertensionaha.111.187872] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Mineralocorticoid receptor (MR) activation may be deleterious to the cardiovascular system, and MR antagonists improve morbidity and mortality of patients with heart failure. However, mineralocorticoid signaling in the heart remains largely unknown. Using a pan-genomic transcriptomic analysis, we identified neutrophil gelatinase-associated lipocalin (NGAL or lipocalin 2) as a strongly induced gene in the heart of mice with conditional and targeted MR overexpression in cardiomyocytes (whereas induction was low in glucocorticoid receptor-overexpressing mice). NGAL mRNA levels were enhanced after hormonal stimulation by the MR ligand aldosterone in cultured cardiac cells and in the heart of wild-type mice. Mineralocorticoid pathological challenge induced by nephrectomy/aldosterone/salt treatment upregulated NGAL expression in the heart and aorta and its plasma levels. We show evidence for MR binding to an NGAL promoter, providing a mechanism for NGAL regulation. We propose that NGAL may be a marker of mineralocorticoid-dependent injury in the cardiovascular system in mice.
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Mueller G, Groot S, Woude L, Perret C, Michel F, Hopman M. Prediction models and development of an easy to use open-access tool for measuring lung function of individuals with motor complete spinal cord injury. J Rehabil Med 2012; 44:642-7. [DOI: 10.2340/16501977-1011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Perret C, Labruyère R, Mueller G, Strupler M. Correlation of heart rate at lactate minimum and maximal lactate steady state in wheelchair-racing athletes. Spinal Cord 2011; 50:33-6. [DOI: 10.1038/sc.2011.97] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Griol-Charhbili V, Fassot C, Messaoudi S, Perret C, Agrapart V, Jaisser F. Epidermal Growth Factor Receptor Mediates the Vascular Dysfunction But Not the Remodeling Induced by Aldosterone/Salt. Hypertension 2011; 57:238-44. [DOI: 10.1161/hypertensionaha.110.153619] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Pathophysiological aldosterone (aldo)/mineralocorticoid receptor signaling has a major impact on the cardiovascular system, resulting in hypertension and vascular remodeling. Mineralocorticoids induce endothelial dysfunction, decreasing vasorelaxation in response to acetylcholine and increasing the response to vasoconstrictors. Activation of the epidermal growth factor receptor (EGFR) is thought to mediate the vascular effects of aldo, but this has yet to be demonstrated in vivo. In this study, we analyzed the molecular and functional vascular consequences of aldo-salt challenge in the waved 2 mouse, a genetic model with a partial loss of EGFR tyrosine kinase activity. Deficient EGFR activity is associated with global oxidative stress and endothelial dysfunction. A decrease in EGFR activity did not affect the arterial wall remodeling process induced by aldo-salt. By contrast, normal EGFR activity was required for the aldo-induced enhancement of phenylephrine- and angiotensin II–mediated vasoconstriction. In conclusion, this in vivo study demonstrates that EGFR plays a key role in aldosterone-mediated vascular reactivity.
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Coste J, Perret C, Lemaire JJ. Étude de la production verbale orale chez les patients parkinsoniens : corrélations entre activité neuronale de structures sous-thalamiques et dénomination d’images. Neurochirurgie 2010. [DOI: 10.1016/j.neuchi.2010.10.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Duong Van Huyen JP, Vessières E, Perret C, Troise A, Prince S, Guihot AL, Barbry P, Henrion D, Bruneval P, Laurent S, Lelièvre-Pégorier M, Fassot C. In utero exposure to maternal diabetes impairs vascular expression of prostacyclin receptor in rat offspring. Diabetes 2010; 59:2597-602. [PMID: 20622163 PMCID: PMC3279527 DOI: 10.2337/db10-0311] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE To evaluate modifications of arterial structure, gene expression, and function in our model of rats exposed to maternal diabetes. RESEARCH DESIGN AND METHODS Morphometric analyses of elastic vessels structure and determination of thoracic aortic gene expression profile with oligonucleotide chips (Agilent, G4130, 22k) were performed before the onset of established hypertension (3 months). RESULTS Arterial parameters of in situ fixed thoracic aorta were not significantly different between control mother offspring and diabetic mother offspring (DMO). The aortic gene expression profile of DMO is characterized by modifications of several members of the arachidonic acid metabolism including a twofold underexpression of prostacyclin receptor, which could contribute to decreased vasodilatation. This was confirmed by ex vivo experiments on isolated aortic rings. Pharmacological studies on conscious rats showed that systolic blood pressure decline in response to a PGI(2) analog was impaired in DMO rats. CONCLUSIONS These results suggest an abnormal vascular fetal programming of prostacyclin receptor in rats exposed in utero to maternal hyperglycemia that is associated with impaired vasodilatation and may be involved in the pathophysiology of hypertension in this model.
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Corre P, Perret C, Isidor B, Khonsari RH. A brain abscess following dental extractions in a patient with hereditary hemorrhagic telangiectasia. Br J Oral Maxillofac Surg 2010; 49:e9-11. [PMID: 20719417 DOI: 10.1016/j.bjoms.2010.07.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Accepted: 07/23/2010] [Indexed: 10/19/2022]
Abstract
Oral and maxillofacial surgeons must be aware of the potentially life-threatening complications of dental extractions in patients with hereditary haemorrhagic telangiectasia because of their high prevalence of pulmonary arteriovenous fistulas. Despite the lack of evidence-based guidelines, antibiotic cover should be given to patients with HHT who require oral surgery according to the same rules as those used for patients at high risk of bacterial endocarditis.
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Lefebvre M, Néel A, Perret C, Hamidou M, Connault J. Prise en charge des thrombophlébites septiques fongiques : intérêt de la thrombectomie endovasculaire en complément du traitement antifongique. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.03.179] [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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