Administration of Lactobacillus paracasei HB89 mitigates PM2.5-induced enhancement of inflammation and allergic airway response in murine asthma model

• Published in: PloS one 2020-12, Vol.15 (12), p.e0243062
• Main Authors: Lin, Ching-Hung, Tseng, Chia-Yi, Chao, Ming-Wei
• Format: Article
• Language: English
• Subjects: Air pollution; Allergies; Animal models; Animals; Asthma; Asthma - chemically induced; Asthma - diet therapy; Asthma - immunology; Biology and Life Sciences; Biomedical engineering; Blood; Blood cells; Body weight; Cell proliferation; Cytokines; Cytokines - metabolism; Disease Models, Animal; Down-Regulation; Female; Gram-positive bacteria; Health care; Histamine; Histamine - metabolism; Hypersensitivity; Immune response; Immune system; Immunoglobulin E; Immunoglobulin E - blood; Interleukin 13; Interleukin 4; Interleukin 5; Lactobacilli; Lactobacillus paracasei; Lactobacillus paracasei - physiology; Lavage; Leukocytes; Lungs; Lymphocyte Count; Lymphocytes; Medicine and Health Sciences; Mice; Mice, Inbred BALB C; Nanotechnology; Outdoor air quality; Ovalbumin - immunology; Oxidative stress; Particle size; Particulate matter; Particulate Matter - adverse effects; Particulate Matter - immunology; Physical Sciences; Pollutants; Research and Analysis Methods; Respiratory diseases; Respiratory tract; Treatment Outcome
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0243062

PM2.5 causes abnormal immune response and asthma in animals. In this study, a Balb/c mouse animal model was exposed to PM2.5 to induce asthma. Lactobacillus paracasei HB89 was fed at the same time, in order to observe whether L. paracasei HB89 mitigates respiratory tract allergies stimulated by PM2.5. The results showed that PM2.5 stimulated a significant increase in white blood cells and immunoglobulin (IgE) in OVA-induced allergic Balb/c mice, and IgE in the blood further triggered the release of histamine in the lung immune cells. This not only increased overall immune cell counts, but the lymphocyte counts also increased significantly, resulting in significant inhibitions of cytokines INF-r and TGF-β, and induction of IL-4, IL-5, IL-13 and IL-17a. After feeding with HB89, apart from the absence of observable changes in body weight, the total white blood cell count in the animal blood and IgE response were also be reduced; the proliferation of immune cells in the lungs caused by PM2.5 was slowed down; and histamine and cytokines INF-r and TGF-β were secreted in large quantities, but IL- 4, IL-5, IL-13, IL-17a were inhibited, which effectively reduced the possibility of asthma induction.