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Hemodynamic and antifibrotic effects of a selective liver nitric oxide donor V-PYRRO/NO in bile duct ligated rats

World Journal of Gastroenterology 2006年第41期12卷 6639-6645页

作者： frédéric moal Nary Veal Eric Vuillemin Eric Barrière Jianhua Wang Lionel Fizanne frédéric Oberti Olivier douay Yves Gallois dominique Bonnefont-Rousselot Marie Christine Rousselet Paul Calès Laboratoire HIFIH UPRES 3859 Université Angers France Laboratoire de Biochimie Université Angers France INSERM U481 Hopital Beaujon Clichy France Laboratoire de Biochimie Hopital de 1a Salpêtrière Paris France

AIM: To assess whether a liver specific nitric oxide (NO) donor (V-PYRRO/NO) would prevent the development of portal hypertension and liver fibrosis in rats with bile duct ligation (BdL). METHOdS: Treatment (placebo or V-PYRRO/NO 0.53 μmol/kg per hour) was administered i.v. to rats 2 d before BdL (d-2) and maintained until the day of hemodynamic measurement (d26). Intra-hepatic NO level was estimated by measuring liver cGMP level. Effects of V-PYRRO/NO on liver fibrosis and lipid peroxidation were also assessed. RESULTS: Compared to placebo treatment, V-PYRRO/ NO improved splanchnic hemodynamics in BdL rats: portal pressure was significantly reduced by 27% (P d collateral circulation development was almost completely blocked (splenorenal shunt blood flow by 74%, P = 0.007). Moreover, V-PYRRO/NO significantly prevented liver fibrosis development in BdL rats (by 30% in hepatic hydroxyproline content and 31% in the area of fibrosis, P due to a decrease in lipid peroxidation by 44% in the hepatic malondialdehyde level (P = 0.007). Interestingly, we observed a significant and expected increase in liver cGMP, without any systemic hemodynamic effects (mean arterial pressure, vascular systemic resistance and cardiac output) in both sham- operated and BdL rats treated with V-PYRRO/NO. This result is in accordance with studies on V-PYRRO/NO metabolism showing a specific release of NO in the *** in BdL rats improved liver fibrosis and splanchnic hemodynamics without any noxious systemic hemo- dynamic effects.

关键词： Nitric oxide Portal hypertension Liver fibrosis Hemodynamics Rats

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Volume and fat infiltration of spino-pelvic musculature in adults with spinal deformity

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World Journal of Orthopedics 2015年第9期6卷 727-737页

作者： Bertrand moal Nicolas Bronsard José G Raya Jean Marc Vital frank Schwab Wafa Skalli Virginie Lafage Spine division Hospital for Joint DiseasesNew-York University University Langone Medical Center Nice University Hospital Center Orthopedic and Traumatologic Surgery DepartmentH?pital Saint Roch Center for Biomedical Imaging Department of RadiologyNew York University Langone Medical Center University Hospital of Bordeaux Spinal UnitDepartement of Orthopaedic Surgery Laboratory of Biomechanics Arts et Métiers ParisTech

AIM: To investigate fat infiltration and volume of spino-pelvic muscles in adults spinal deformity(ASd) with magnetic resonance imaging(MRI) and 3d ***: Nineteen female ASd patients(mean age 60 ± 13) were included prospectively and consecutively and had T1-weighted Turbo Spin Echo sequence MRIs with dixon method from the proximal tibia up to T12 vertebra. The dixon method permitted to evaluate the proportion of fat inside each muscle(fat-water ratio). In order to investigate the accuracy of the dixon method for estimating fat vs water, the same MRI acquisition was performed on phantoms of four vials composed of different proportion of fat vs water. With Muscl'X software, 3d reconstructions of 17 muscles or group of muscles were obtained identifying the muscle's contour on a limited number of axial images [deformation of parametric specific objects(dPSO) Method]. Musclar volume(Vmuscle), infiltrated fat volume(Vfat) and percentage of fat infiltration [Pfat, calculated as follow: Pfat = 100 ×(Vfat/Vmuscle)] were characterized by extensor or flexor function respectively for the spine, hip and knee and theirs relationship with demographic data were investigated. RESULTS: Phantom acquisition demonstrated a non linear relation between dixon fat-water ratio and the real fat-water ratio. In order to correct the dixon fatwater ratio, the non linear relation was approximated with a polynomial function of degree three using the phantom acquisition. On average, Pfat was 13.3% ± 5.3%. Muscles from the spinal extensor group had a Pfat significantly greater than the other muscles groups, and the largest variability(Pfat = 31.9% ± 13.8%, P from the hip extensor group ranked 2nd in terms of Pfat(14% ± 8%), and were significantly greater than those of the knee extensor(P = 0.030). Muscles from the knee extensor group demonstrated the least Pfat(12% ± 8%). They were also the only group with a significant correlation between Vmuscle and Pfat(r =-0.

关键词： Spino-pelvic musculature Adults with spinal deformity Muscular degeneration Muscular volume Fat infiltration dixon method

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FibroMeters:诊断肝纤维化的血液学检测指标组合(英文)

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传染病信息 2013年第3期26卷 134-140页

作者： Paul Calès Jérme Boursier frédéric Oberti Isabelle Hubert Yves Gallois Marie Christine Rousselet Valérie moal Laurent Macchi Alain Chevailler Julien Chaigneau Gilles Hunault HIFIH Laboratory LUNAM University Hepato-gastroenterology department University Hospital Biochemistry Laboratory Hepato-gastroenterology department University Hospital Pathology department University Hospital Hematology Laboratory University Hospital Immunology Laboratory University Hospital

FibroMeters是具有多项特异性的诊断肝纤维化的血液学检测指标组合,其3个主要诊断目标为显著肝纤维化、肝硬化以及肝纤维化的定量,并由专业系统针对不同病因进行调整从而保证获得准确的结果。因此,主要存在 6 种不同的 FibroMeters:即... 详细信息

FibroMeters是具有多项特异性的诊断肝纤维化的血液学检测指标组合,其3个主要诊断目标为显著肝纤维化、肝硬化以及肝纤维化的定量,并由专业系统针对不同病因进行调整从而保证获得准确的结果。因此,主要存在 6 种不同的 FibroMeters:即针对肝纤维化的3种主要病因慢性病毒性肝炎、酒精性肝病和非酒精性脂肪性肝病的肝纤维化分期和肝纤维化定量。以肝组织病理学方法诊断肝纤维化程度进行对照,FibroMeters 表现出非常高的诊断准确率,是惟一能100%正确区分丙型肝炎患者不伴有肝纤维化或伴有肝硬化的检测方法。在适用性方面,FibroMeters 对于显著肝纤维化的 90%预测值高于其他血清学检测方法。使用包括 7 类内容在内的详细的肝纤维化分期方法,87%的丙型肝炎患者可以获得准确的肝纤维化分期。在实际工作条件下,FibroMeters 重复性高于肝组织病理结果,也高于超声弹性检测。因诊断性能表现非常稳定,FibroMeters 在不同的中心都是稳健的检测方法。目前可选择的检测有:针对肝硬化诊断的 CirrhoMeter,在一项丙型肝炎肝硬化患者的队列中其诊断准确率为 93%(受试者工作特征曲线下面积:0.92),阳性预测值为 100%;针对肝纤维化定量检测的QuantiMeter,是惟一能通过无创方法直接量化肝纤维化程度的手段,对于随访肝硬化及其临床相关事件可能特别有用。除HCV 感染外,FibroMeters对HBV或HIV同时感染患者诊断准确率高,尤其是对酒精性肝病或非酒精性脂肪肝患者,FibroMeters有较高的诊断准确率(对于显著纤维化,受试者工作特征曲线下面积分别为0.96和0.94)。

关键词：肝纤维化活组织检查血清学弹性显像技术

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Postural spinal balance defined by net intersegmental moments: Results of a biomechanical approach and experimental errors measurement

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World Journal of Orthopedics 2015年第11期6卷 983-990页

作者： Benjamin Blondel Elke Viehweger Bertrand moal Patrick Tropiano Jean-Luc Jouve Virginie Lafage Raphael dumas Stéphane Fuentes Gérard Bollini Vincent Pomero Laboratoire d’analyse du mouvement Spine UnitUniversité Aix-Marseille Ecole doctorale 463 Sciences du Mouvement HumainUniversité Aix-Marseille department of Spine Surgery Hospital for Joint DiseasesNew-York University Université de Lyon IFSTTAR LBMC Université Lyon 1 LBMC

AIM: To describe initial results and experimental error measurement of a protocol analyzing Human posture through sagittal intersegmental moments. METHOdS: Postural analysis has been recently improved by development of three-dimensional radiographic imaging systems. However, in various situations such as global sagittal anterior malalignment interpretation of radiographs may not represent the real alignment of the subject. The aim of this study was to present initial results of a 3d biomechanical protocol. This protocol isobtained in a free standing position and characterizes postural balance by measurement of sagittal intersegmental net moments. After elaboration of a specific marker-set, 4 successive recordings were done on two volunteers by three different operators during three sessions in order to evaluate the experimental error measurement. A supplementary acquisition in a "radiographic" posture was also obtained. Once the data acquired, joint center, length, anatomical frame and the center of mass of each body segment was calculated and a mass affected. Sagittal net intersegmental moments were computed in an ascending manner from ground reaction forces at the ankles, knees, hips and the lumbosacral and thoraco-lumbar spinal junctions. Cervicothoracic net intersegmental moment was calculated in a descending ***: Based on average recordings, clinical interpretation of net intersegmental moments(in N.m) showed a dorsal flexion on the ankles(8.6 N.m), a flexion on the knees(7.5 N.m) and an extension on the hips(8.5 N.m). On the spinal junctions, it was flexion moments: 0.34 N.m on the cervico-thoracic; 6.7 N.m on the thoraco-lumbar and 0.65 N.m on the lumbo-sacral. Evaluation of experimental error measurement showed a small inter-trial error(intrinsic variability), with higher inter-session and inter-therapist errors but without important variation between them. For one volunteer the "radiographic" posture was associated to significant changes compared

关键词： Posture Sagittal alignement Biomechanical evaluation Intersegmental net moments

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