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| Denden,Sabri; Khelil,Amel Haj; Knani,Jalel; Lakhdar,Ramzi; Perrin,Pascale; Lefranc,Gérard; Chibani,Jemni Ben. |
| Alpha-1-antitrypsin (AAT) plays an important role in the pathogenesis of emphysema, the pathological lesion underlying the majority of the manifestations of Chronic Obstructive Pulmonary Disease (COPD). In this study we tested the hypothesis that common AAT polymorphisms influence the risk of developing COPDs. We investigated PiM1 (Ala213Val), PiM2 (Arg101His), PiM3 (Glu376Asp), PiS (Glu264Val) and PiZ (Glu342Lys) SERPINA1 alleles in 100 COPD patients and 200 healthy controls. No significant differences were observed in allele frequencies between COPD patients and controls, neither did haplotype analysis show significant differences between the two groups. A cross-sectional study revealed no significant relationship between common SERPINA1 polymorphisms... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alpha-1 antitrypsin; SERPINA1 polymorphisms; COPD; Emphysema; Lung function. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000100006 |
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| Ljujic,Mila; Topic,Aleksandra; Nikolic,Aleksandra; Divac,Aleksandra; Grujic,Milan; Mitic-Milikic,Marija; Radojkovic,Dragica. |
| The alpha-1-antitrypsin (A1AT) gene is highly polymorphic, with more than 100 genetic variants identified of which some can affect A1AT protein concentration and/or function and lead to pulmonary and/or liver disease. This study reports on the characterization of a p.G320R variant found in two patients, one with emphysema and the other with lung cancer. This variant results from a single base-pair substitution in exon 4 of the A1AT gene, and has been characterized as P by isoelectric focusing. Functional evaluation of the A1AT p.G320R variant was through comparing specific trypsin inhibitory activity in two patients with pulmonary disorders, carriers of the p.G320R variant, and 19 healthy individuals, carriers of normal A1AT M variants. Results showed that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alpha-1-antitrypsin; Emphysema; Lung cancer; P variant; Specific trypsin inhibitory activity. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000100002 |
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| Cendon,S.P.; Battlehner,C.; Lorenzi-Filho,G.; Dohlnikoff,M.; Pereira,P.M.; Conceição,G.M.S.; Beppu,O.S.; Saldiva,P.H.N.. |
| We describe a short time model for inducing experimental emphysema in rats by chronic tobacco smoke inhalation. Three groups of male Wistar rats (6 months old) were studied: controls (N = 8), rats intoxicated for 45 days (s-45, N = 7) or for 90 days (s-90, N = 8). The exposed animals were intoxicated 3 times a day (10 cigarettes per exposure period), 5 days a week. Pulmonary damage was assessed by means of functional tests and quantitative pathological examination of the airways and lung parenchyma. The s-45 and s-90 animals were similar in terms of functional residual capacity (FRC) corrected for body weight (FRC/kg) but both groups of smoking rats exhibited significantly higher FRC/kg values than the controls (s-45 = 6.33; s-90 = 6.46; controls = 3.78;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Passive smoking; Emphysema; Rats; Pulmonary function; Morphological analysis; Quantification. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001000017 |
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| Biselli,P.J.C.; Lopes,F.D.T.Q.S.; Moriya,H.T.; Rivero,D.H.R.F.; Toledo,A.C.; Saldiva,P.H.N.; Mauad,T.; Martins,M.A.. |
| Chronic obstructive pulmonary disease (COPD) is associated with inflammatory cell reactions, tissue destruction and lung remodeling. Many signaling pathways for these phenomena are still to be identified. We developed a mouse model of COPD to evaluate some pathophysiological mechanisms acting during the initial stage of the disease. Forty-seven 6- to 8-week-old female C57/BL6 mice (approximately 22 g) were exposed for 2 months to cigarette smoke and/or residual oil fly ash (ROFA), a concentrate of air pollution. We measured lung mechanics, airspace enlargement, airway wall thickness, epithelial cell profile, elastic and collagen fiber deposition, and by immunohistochemistry transforming growth factor-β1 (TGF-β1), macrophage elastase (MMP12), neutrophils... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Emphysema; Cigarette smoke; Airways; TGF-β1; Mouse airway epithelium remodeling; Proximal airspace enlargements. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000500012 |
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| Coelho,Ana Carolina Barreto; Oliveira,Plínio Aguiar; Santos,Bianca Lemos dos; Estima-Silva,Pablo; Scheid,Haide Valeska; Leal,Sofia del Carmen Bonilla de Souza; Marcolongo-Pereira,Clairton; Schild,Ana Lucia. |
| ABSTRACT: The aim of the present study was to describe an outbreak of atypical interstitial pneumonia affecting 15 Angus cattle aged 7-30 months in the south of Rio Grande do Sul. The clinical course of the disease was approximately 1-3 days. The cattle were kept in the native field and had received feed containing the remains of wafers from a food factory before the outbreak. Clinical signs included dyspnea and abdominal breathing, with a clinical evolution period of up to 3 days. Nine animals presented apathy and respiratory difficulty and died within 24h, while three animals exhibited a clinical evolution period of 36-48h. Three other animals died without any clinical signs. The main macroscopic lesions were observed in the lungs, which did not collapse... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pulmonary edema; Emphysema; Respiratory disorder; Cattle; Hypersensitivity; Interstitial pneumonia. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001100551 |
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| Marcolongo-Pereira,Clairton; Stigger,Adriana; Fiss,Letícia; Coelho,Ana Carolina; Santos,Bianca; Junior,Sergio Vargas; Schild,Ana Lucia. |
| This report describes pneumomediastinum and subcutaneous emphysema in a bull with paralytic rabies. The bull displayed severe swelling in the head, neck, chest and forelimbs extending to the ventrum, including the prepuce, 7 days after the development of neurological signs. At necropsy, extensive subcutaneous emphysema was observed in the neck region, abdominal wall and proximal forelimbs. The lungs failed to collapse and had severe emphysema with bullae. Rabies was suspected due to an ongoing outbreak at the farm and was confirmed by histologic lesions and immunohistochemistry. Similar to humans, pneumomediastinum and subcutaneous emphysema should be considered as an unusual complication of rabies in cattle. |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Pneumomediastinum; Emphysema; Rabies; Cattle.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000100068 |
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