Probiotics supplementation reduces cigarette smoke-induced damage in the respiratory micro-architecture of mice




Emphysema, Respiratory epithelium, Asthma, Goblet cells, Lungs


This study evaluated the protective efficacy of probiotics supplementation against cigarette smoke-induced lung emphysema, inflammation, and loss of cilia in mice. Probiotics are known to promote mucosal tolerance and mitigate respiratory injuries. Twenty-four adult mice were randomly divided into three groups: control (Ctr), cigarette smoke (CS), and cigarette smoke + probiotics (CS+P). Probiotics were given for 7 days before exposure to smoke in the CS+P group. Tissue samples of the trachea (goblet cell count and index, loss of cilia), lungs (airspace distention), and bronchoalveolar lavage fluid (BALF) were collected and processed. The results showed a significant increase in acidic and neutral goblet cells in the CS group compared to the Ctr and CS+P groups (P < 0.05). Overall, goblet cell number and index were lower in the CS+P group (41.71 ± 5.76, 0.67 ± 0.073) than CS group (56.28 ± 5.34, 1.31 ± 0.28). Inflammatory cells and loss of cilia significantly decreased in mice fed probiotics before exposure to cigarette smoke (P < 0.05). Lung emphysema was also significantly reduced in the CS+P group compared to the CS group (P < 0.05). In conclusion, dietary supplementation of probiotics reduced lung emphysema, inflammatory cells, goblet cell index, and loss of cilia under conditions of cigarette smoke exposure in mice.


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How to Cite

Khan K, Zaneb H, Masood S, Ashraf S, Usman MM, Faseehur-Rehman H, et al. Probiotics supplementation reduces cigarette smoke-induced damage in the respiratory micro-architecture of mice. Braz. J. Vet. Res. Anim. Sci. [Internet]. 2023 Mar. 20 [cited 2024 Apr. 14];60:e201873. Available from: