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Membrane and Subcellular Muscle Injury Are Induced by Single or Multiple Exposure to Cigarette Smoke

Open Journal of Pathology 2014年第3期4卷 125-137页

作者： Ana Maria Fleig-Mayer Alba Ramirez-Sarmiento Amanda Iglesias montserrat morla Carlos Coronell Diego Rodríguez Simona Pichinni Josep Lloreta Piergiorgio Zuccaro Xavier Busquets Joaquim Gea Jose R.Jardim Mauricio Orozco-Levi Centro Universitario do Triangulo(UNITRI) Avenida nicomedes Alves Dos Santos4545-GaveaUberlandiaPulmonary Rehabilitation CenterRespiratory DivisionFederal University of Sao PauloSao PauloBrazil Group of Research in Injury Immune Response and Function(LIF)Municipal Institute of Medical Research(IMIM)Carrer Dr.Aiguader 88BarcelonaE-08003Spain Servei de Pneumologia Hospital del MarPasseig Maritim 25BarcelonaE-08003Spain Centro en Red de Investigacion de Enfermedades Respiratorias(CIBERES) Recinto Hospital Joan March Carretera Soller Km.1207110BunyolaMallorcaIlles BalearsSpain Institut Universitari d’Investigacio en Ciencies de la Salut(IUNICS)and Department de Biologia Universitat Illes Balears(UIB)Cra de ValldemossaKm 7.5PalmaIlles BalearsSpain Laboratorio Di Biochimica Clinica Istituto Superiore Di Sanita.Viale Regina Elena 29900161RomaItaly Respiratory Department Fundacion Cardiovascular de ColombiaCalle 155A 23-58FloridablancaSantanderColombia Servei d’Anatomia Patologica Hospital del MarPasseig Maritim 25BarcelonaE-08003Spain

Cigarette smoking is the main cause of chronic obstructive pulmonary disease (COPD). Diaphragm injury is observed in patients with COPD. However, the potential role of smoking in triggering or perpetuating muscle injury is unknown. The present study was aimed at evaluating the potential role of commercial tobacco smoke as a direct cause of skeletal muscle injury in experimental conditions. Seventy Wistar rats (170 - 250 g) were assigned to smoking (n = 49) or non-smoking (n = 21) groups. The smoking groups were submitted to a single or multiple (i.e., five or thirty) daily sessions of cigarette smoking in an inhalatory chamber (time length: 2 h each session). The level of exposure was constant and assessed by CO concentrations (50 ppm) and serum cotinine analysis. Animals submitted to a single smoke exposure and the corresponding controls were euthanized in groups at 0 h, 2 h, 4 h, 24 h or 48 h after completing the exposure. Animals submitted to multiple exposures were euthanized at 0 h after smoking. Samples from vastus lateralis muscle were obtained and processed for assessing cell injury and selected protein expression. Monoclonal anti-albumin antibodies were used to identify muscle fibers with sarcolemmal (membrane) injury. Subcellular muscle injury was assessed using transmission electron microscopy (EM). MyoD, myogenin and α-tubulin were immunodetected using western blot techniques. Exposure to cigarette smoke associated with significant membrane damage (mean relative difference (MRD) with controls: +181%, p = 0.004) and sarcomere disruptions (MRD: +226%, p = 0.001). Expression of MyoD and myogenin (normalized to α-tubulin) were significantly increased at 4 h and remained increased at 48 h post-exposure. We conclude that not only a single but also consecutive exposure to tobacco smoke have acute deleterious effects on peripheral muscle structure. A rapid induction of subrogate markers of skeletal muscle stress and repair processes associates to sarcolemmal and

关键词： Skeletal Muscle Muscle Injury Muscle Regeneration Quadriceps Cigarette Smoking

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Inertisation options for BG method and optimisation using CFD modelling

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International Journal of Mining Science and Technology 2015年第3期25卷 401-405页

作者： morla Ramakrishna Balusu Rao Tanguturi Krishna Ting Ren CSIRO Earth Science and Resource Engineering Faculty of Engineering and Information Science University of Wollongong

Spontaneous combustion(sponcom) is one of the issues of concern with the blasting gallery(BG) method of coal mining and has the potential to cause fires, and impact on production and safety, greenhouse gas(GHG) emissions and huge costs involved in controlling the aftermath situations. Some of the research attempts made to prevent and control coal mine fires and spontaneous combustion in thick seams worked with bord and pillar mining methods are presented in this paper. In the study, computational fluid dynamics(CFD) modelling techniques were used to simulate and assess the effects of various mining methods, layouts, designs, and different operational and ventilation parameters on the flow of goaf gases in BG panels. A wide range of parametric studies were conducted to develop proactive strategies to control and prevent ingress of oxygen into the goaf area preventing spontaneous combustion and mine fires.

关键词： CFD 建模方法计算流体动力学选项惰性优化煤矿火灾温室气体

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New insights into sodium transport regulation in the distal nephron:Role of G-protein coupled receptors

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World Journal of Biological Chemistry 2016年第1期7卷 44-63页

作者： Luciana morla Aurélie Edwards Gilles Crambert Sorbonne Universités UPMC Univ Paris 06INSERMUniversité Paris DescartesSorbonne Paris CitéUMR_S 1138Centre de Recher-che des Cordeliers CNRS ERL 8228 Centre de Recherche des CordeliersLaboratoire de Métabolisme et Physiologie Rénale Centre de Recherche des Cordeliers INSERM U1138CNRS ERL 8228Equipe 3:Métabolisme et Physiologie Rénale

The renal handling of Na^+ balance is a major determinant of the blood pressure(BP) level. The inability of the kidney to excrete the daily load of Na+ represents the primary cause of chronic hypertension. Among the different segments that constitute the nephron, those present in the distal part(i.e., the cortical thick ascending limb, the distal convoluted tubule, the connecting and collecting tubules) play a central role in the fine-tuning of renal Na^+ excretion and are the target of many different regulatory processes that modulate Na^+ retention more or less efficiently. G-protein coupled receptors(GPCRs) are crucially involved in this regulation and could represent efficient pharmacological targets to control BP levels. In this review, we describe both classical and novel GPCR-dependent regulatory systems that have been shown to modulate renal Na^+ absorption in the distal nephron. In addition to the multiplicity of the GPCR that regulate Na^+ excretion, this review also highlights the complexity of these different pathways, and the connections between them.

关键词： Kidney Sodium excretion Blood pressure G-protein coupled receptors Peptide hormone

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