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Air way smooth muscle cell

Hwa Young Lee, Chin Kook Rhee, Ji Young Kang, Chan Kwon Park, Sook Young Lee, Soon Suk Kwon, Young Kyoon Kim, Hyoung Kyu Yoon
BACKGROUND/AIMS: Asthma is characterized by airway hyperresponsiveness, inflammation, and remodeling. Peroxisome proliferator-activated receptors have been reported to regulate inflammatory responses in many cells. In this study, we examined the effects of intranasal rosiglitazone on airway remodeling in a chronic asthma model. METHODS: We developed a mouse model of airway remodeling, including smooth muscle thickening, in which ovalbumin (OVA)-sensitized mice were repeatedly exposed to intranasal OVA administration twice per week for 3 months...
January 2016: Korean Journal of Internal Medicine
Xia Fang, Xi Chen, Guangwei Zhong, Qiong Chen, Chengping Hu
During hypoxia-induced pulmonary hypertension (HPH), pulmonary artery smooth muscle cells (PASMCs) proliferate as part of the characteristic pulmonary vascular remodeling. We investigated the expression of mitofusin 2(Mfn2) and its role in maintaining the balance between PASMC proliferation and apoptosis during hypoxia. In an experimental model of HPH, we exposed rats to hypoxia (10% ± 0.5% O2) or room air for 4 weeks. We found that Mfn2 messenger RNA and protein levels were reduced and that proliferating cell nuclear antigen protein expression was upregulated in HPH rat lung tissues...
February 2016: Journal of Cardiovascular Pharmacology
Maroun J Mhanna, Jeffrey F Koester, Robert C Cohn
BACKGROUND: Racemic (R,R/S,S)-formoterol is a long-acting β-agonist composed of a 50:50 mixture of (R,R)- and (S,S)-enantiomers. OBJECTIVE: The aim of this study was to determine whether (R,R)-formoterol and (R,R/S,S)-formoterol have differing effects on airway contraction and relaxation in vitro. METHODS: Cylindrical airway segments 3-mm long were isolated from the mid-trachea of healthy Sprague-Dawley rats and placed in a modified Krebs-Henseleit solution...
July 2007: Current Therapeutic Research, Clinical and Experimental
Yi-ling Pan, Bing Li, Pi-xin Ran
OBJECTIVE: To investigate the effect of wood smoke condensate (WSC) on proliferation and necrosis of human airway smooth muscle cells (HASMCs). METHODS: Primary cultured HASMCs between passage 2 and 8 were divided into 3 groups: a control group, a WSC group and a cigarette smoke condensate (CSC) group. The viability of cells was examined by the CCK8 assays. The ratio of cellular proliferative stage (S phase) and cell cycle index were examined by fluorescent-labeled thymidine analogue uptake assays and flow cytometry...
August 2013: Chinese Journal of Tuberculosis and Respiratory Diseases
Aya Ohnuma-Koyama, Toshinori Yoshida, Haruka Tajima-Horiuchi, Naofumi Takahashi, Satoru Yamaguchi, Ryoichi Ohtsuka, Yukiko Takeuchi-Kashimoto, Maki Kuwahara, Makio Takeda, Nobuaki Nakashima, Takanori Harada
Didecyldimethylammonium chloride (DDAC) is a representative dialkyl-quaternary ammonium compound that is used as a disinfectant against several pathogens and is also used in commercial, industrial, and residential settings. We previously investigated toxicity on air way system following single instillation of DDAC to the lungs in mice, and found that DDAC causes pulmonary injury, which is associated with altered antioxidant antimicrobial responses; the inflammatory phase is accompanied or followed by fibrotic response...
November 2013: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
C Godoy-Guzmán, S San Martin, J Pereda
The lung is formed from a bud that grows and divides in a dichotomous way. A bud is a new growth center which is determined by epithelial-mesenchymal interactions where proteins of the extracellular matrix (ECM) might be involved. To understand this protein participation during human lung development, we examined the expression and distribution of proteoglycans in relation to the different types of collagens during the period in which the air conducting system is installed. Using light microscopy and immunohistochemistry we evaluate the expression of collagens (I, III and VI) and proteoglycans (decorin, biglycan and lumican) between 8 to 10 weeks post fertilization and 11 to 14 weeks of gestational age of human embryo lungs...
2012: European Journal of Histochemistry: EJH
Hongbin Li, Yuemin Xu, Qiang Fu, Chao Li
Mesenchymal stem cells have been given particular attention in tissue regeneration research due to their multipotency and proliferative activity. In this study, we investigated the possibility of epithelial differentiation of rabbit adipose-derived stem cells (rASCs) in an in vitro 3D culture system. The experimental procedure was performed with different contributing factors including all-trans retinoic acid (ATRA), epidermal growth factor (EGF), keratinocyte growth factor (KGF), hepatocyte growth factor (HGF), and hydrocortisone in air-liquid interface culture, for modulating proliferation and providing a synergistic effect on epithelial differentiation of rASCs...
September 2012: Tissue Engineering. Part A
Yue Tian, Xiu-ying Tang, Hong-fang Jin, Chao-shu Tang, Jun-bao Du
OBJECTIVE: Hypoxic pulmonary hypertension is an important pathophysiologic process of various cardiovascular diseases. Sulfur dioxide (SO2) was considered as a kind of toxic gas previously, but recent studies suggested that SO2 could act as a key bioactive molecule in the pathogenesis of cardiovascular diseases. Therefore, this study was designed to examine the effect of sulfur dioxide on pulmonary vascular structure of hypoxic pulmonary hypertensive rats treated with SO2 donor substances...
September 2008: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
Lovro Ziberna, Mojca Lunder, Jernej Kuzner, Gorazd Drevensek
INTRODUCTION: The vasomotor response of the coronary artery is altered by hypoxia-reoxygenation (H-R) induced damage. The aim of our study was to compare and evaluate normothermic and hypothermic models which are suitable for future drug studies of vasoprotective action against H-R injury. METHODS: Porcine coronary arterial rings were isolated and placed in Krebs-Henseleit (K-H) solution. Rings were exposed to normoxic conditions (control group) and two different H-R conditions: the first induced by a 95% N(2)-5% CO(2) gas mixture (40- and 60-min hypoxia) in a normothermic protocol, and the second induced by hypothermic (4 degrees C) hypoxia-reoxygenation in an air-tight beaker filled with K-H solution (24- and 48-hours hypoxia)...
January 2009: Journal of Pharmacological and Toxicological Methods
E Roux, N Ouedraogo, J M Hyvelin, J P Savineau, R Marthan
A useful approach for constructing dose-response relationships and for studying the underlying mechanisms by which a xenobiotic agent enhances airway reactivity is to measure the response of an isolated airway following ex vivo exposure to a pollutant. We have in this way determined the dose-response relationship between ex vivo exposure to pollutants such as nitrogen dioxide (NO2), the aldehyde acrolein, and ozone (O3) and the reactivity to agonists in human isolated bronchial smooth muscle. We have also investigated the underlying alteration in the cellular mechanisms of airway smooth-muscle contraction induced by such exposure and found that it is related to alteration in calcium signaling at the site of the airway smooth-muscle cell...
2002: Cell Biology and Toxicology
P Toti, G Buonocore, P Tanganelli, A M Catella, M L Palmeri, R Vatti, T A Seemayer
Prematurely born infants who required assisted ventilation may develop chronic lung disease or bronchopulmonary dysplasia (BPD). The cells involved in the reparative process of the premature lung are not well defined. The repair of injured tissues is a highly standardized process and the most important cells are activated (modulated) fibroblasts (myofibroblasts). A key cytokine in controlling repair is transforming growth factor-beta (TGF-beta). To characterize the cells involved in the repair process of the premature lung, we employed immunocytochemical techniques and examined the lungs of 39 autopsied premature babies who had neonatal respiratory distress syndrome (RDS)...
July 1997: Pediatric Pulmonology
M Ragosta, L W Gimple, S D Gertz, C T Dunwiddie, G P Vlasuk, H L Haber, E R Powers, W C Roberts, I J Sarembock
BACKGROUND: Balloon angioplasty of atherosclerotic arteries results in activation of the coagulation cascade. Several coagulation factors, including factor Xa and thrombin, are mitogenic for vascular smooth muscle cells in vitro and thus may play a role in restenosis after balloon angioplasty. Specific inhibition of factor Xa can be achieved with recombinant antistasin (rATS) or tick anticoagulant peptide (rTAP). We hypothesized that inhibition of Xa would limit restenosis after balloon angioplasty in an atherosclerotic rabbit model...
March 1994: Circulation
R Pauwels
Bronchial hyperreactivity is a major if not an essential characteristic of bronchial asthma. The relation between mediators and non-specific bronchial reactivity is an essential question in the pathogenesis of bronchial asthma. This is reflected in the different hypotheses on pathogenesis. The bronchial reaction to mediators is determined by the pre-existing degree of non specific bronchial reactivity. Bronchial reactivity to histamine or prostaglandin F2 alfa is related to the bronchial metacholine-reactivity...
1983: European Journal of Respiratory Diseases. Supplement
H Karibe, M K Uchida
1. Ca reversal was reported on the longitudinal smooth muscle of rat uterus and the fundic part of the circular smooth muscle of guinea pig stomach; that is, addition of Ca ion to the Ca-free bathing solution in which the muscle is contracting to oxytocin or carbachol, respectively, relaxes the muscle. 2. We tested whether this inhibitory action of Ca ion is seen in other smooth muscles including vascular, air way, gastric and genital smooth muscles. 3. We found that Ca reversal was observed in the smooth muscle of rat thoracic aorta contracted by norepinephrine or by a phorbol ester, TPA, guinea pig tracheal smooth muscle contracted to carbachol, fundic smooth muscle of rat stomach to carbachol, corporal and antral smooth muscle of guinea pig stomach to carbachol and rat vas deferens to norepinephrine...
1991: General Pharmacology
P J Rombout, J A Dormans, L van Bree, M Marra
The effect of ozone inhalation on birds was investigated. Japanese quail were exposed continuously to 0, 0.3, 1.0, and 3.0 mg/m3 ozone (0, 0.15, 0.50, and 1.50 ppm, respectively) for 7 days. Pulmonary effects were determined by light and electron microscopy as well as by biochemistry. Focal areas of hemorrhages were noticed in the birds exposed to 1.0 mg/m3 ozone. Additional effects after exposure to 1 mg/m3 included loss of cilia in trachea and bronchi, an inflammatory response, and necrosis of air capillary epithelial cells...
February 1991: Environmental Research
H Lévesque, N Moore, C Thuillez, H Courtois
Endothelin (ET) is a novel vasoactive peptide occurring in 3 isoforms (ET1, ET2, ET3) in humans. Derived from vascular endothelium cells, ET arises from a precursor peptide and exerts diverse actions through specific receptors. ET possess a wide spectrum of activities: a potent vasoconstrictor activity but also contraction of nonvascular smooth muscles (air-way, intestinal, urinary) or mitogenic actions, renal and endocrine effects. The physiological and/or physiopathological roles of endothelin is still unclear, but ET may play a part in the genesis of some vascular diseases as atherosclerosis, forms of hypertension or may be implicated in the pathogenesis of vasospasm...
January 1992: Thérapie
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