The Possible Protective Effect of Losartan on Bleomycin-Induced Pulmonary Fibrosis in Albino Rats: A Histological And Immunohistochemical Study
Filobbos, S., Mohammed, D., Abd-Elfattah, L., Sabry, M. (2011). The Possible Protective Effect of Losartan on Bleomycin-Induced Pulmonary Fibrosis in Albino Rats: A Histological And Immunohistochemical Study. EKB Journal Management System, 34(2), 119-128. doi: 10.21608/ejana.2011.3665
Soheir Filobbos; Dina Mohammed; Lamiaa Abd-Elfattah; Marwa Sabry. "The Possible Protective Effect of Losartan on Bleomycin-Induced Pulmonary Fibrosis in Albino Rats: A Histological And Immunohistochemical Study". EKB Journal Management System, 34, 2, 2011, 119-128. doi: 10.21608/ejana.2011.3665
Filobbos, S., Mohammed, D., Abd-Elfattah, L., Sabry, M. (2011). 'The Possible Protective Effect of Losartan on Bleomycin-Induced Pulmonary Fibrosis in Albino Rats: A Histological And Immunohistochemical Study', EKB Journal Management System, 34(2), pp. 119-128. doi: 10.21608/ejana.2011.3665
Filobbos, S., Mohammed, D., Abd-Elfattah, L., Sabry, M. The Possible Protective Effect of Losartan on Bleomycin-Induced Pulmonary Fibrosis in Albino Rats: A Histological And Immunohistochemical Study. EKB Journal Management System, 2011; 34(2): 119-128. doi: 10.21608/ejana.2011.3665

The Possible Protective Effect of Losartan on Bleomycin-Induced Pulmonary Fibrosis in Albino Rats: A Histological And Immunohistochemical Study

The Egyptian Journal of Anatomy
Article 9, Volume 34, Issue 2, July 2011, Page 119-128  XML PDF (6.29 MB)
Document Type: Original Article
DOI: 10.21608/ejana.2011.3665
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Authors
Soheir Filobbos1; Dina Mohammed1; Lamiaa Abd-Elfattah2; Marwa Sabry2
1Histology Department, Faculty of Medicine, Cairo University
2Histology Department, Faculty of Medicine, Cairo University.
Abstract
The possible protective effect of Losartan, an angiotensin II receptor 1 antagonist, on bleomycininduced rat lung fibrosis was evaluated using histological and immunohistochemical techniques. Twenty adult male albino rats were divided into 4 groups each of five rats: Group I (control) given saline both I.V and orally, Group II given bleomycin 10mg/Kg/day I.V., Group III given losartan 10 mg/Kg/day orally and Group IV given both bleomycin and losartan. Lung sections were taken at the 28th day of the experiment, stained with H&E, Masson’s trichrome, Orcein and immunohistochemical stain for α-SMA. This was followed by morphometric measurements and statistical analysis. The present study showed that bleomycin induced fibrotic changes in the lung in the form of thickened interalveolar septa filled with proliferated type II pneumocytes, fibroblasts and inflammatory cells with significant increase in collagen and elastic fibres deposition and in α-SMA immunoreactivity. It was found that concomitant treatment with losartan (Group IV) showed significant reduction in these fibrotic changes. The changes in α-SMA immunoreactivity in different groups showed the same pattern as those of collagen and elastic fibres. Thus, it could be concluded that myofibroblasts might play a pivotal role in induction of lung fibrosis and they could be a target of future therapeutic strategies
Keywords
Pulmonary fibrosis- bleomycin- losartan- immunohistochemistry
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