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- W2003301885 abstract "Summary Beta‐blockers, especially selective β 1 ‐adrenoceptor antagonists, are often used to treat cardiovascular disease, even when complicated by chronic obstructive pulmonary disease. The association of beta‐blocker selectivity and treatment effects is disputed, and the curative effects and side‐effects of various antagonists may differ. Herein we investigated the effects of 1 months treatment with the selective β 1 ‐adrenoceptor antagonist metoprolol and the non‐selective β ‐adrenoceptor antagonist propranolol on pulmonary function and pathology in a 4‐month rat model of passive cigarette smoke exposure and explored potential mechanisms of action. Lung function and general pathological changes were evaluated after 4 months exposure to cigarette smoke, with metoprolol and propranolol treatment (50 and 25 mg/kg per day, respectively; intragastrically) during the last month. Cytokine and mucin levels in bronchoalveolar lavage fluid ( BALF ) were determined by ELISA , whereas β 1 ‐ and β 2 ‐adrenoceptor expression in the lungs was evaluated by immunohistochemistry and western blot analysis. Chronic treatment with metoprolol and propranolol did not exacerbate peak expiratory flow or intra‐airway pressure in rats exposed to cigarette smoke. Propranolol significantly attenuated inflammatory cell infiltration, cytokine levels (tumour necrosis factor‐ α and interleukin‐8) in BALF or mucus secretion, whereas metoprolol reduced only smooth muscle proliferation. Moreover, propranolol treatment was associated (albeit not significantly) with restoring β 2 ‐adrenoceptor expression in airway epithelia. Propranolol had a more beneficial effect on cigarette smoking‐induced lung damage than metoprolol in a smoking rat model that may be associated with restoration of endogenous β 2 ‐adrenoceptor density in the airway epithelial cells." @default.
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- W2003301885 date "2014-09-01" @default.
- W2003301885 modified "2023-10-04" @default.
- W2003301885 title "Effect of Long-Term Application of Metoprolol and Propranolol in a Rat Model of Smoking" @default.
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- W2003301885 doi "https://doi.org/10.1111/1440-1681.12261" @default.
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