Bacteria isolated from lung modulate asthma susceptibility in mice

作者：Aude Rémot, Delphyne Descamps, Marie-Louise Noordine, Abdelhak Boukadiri, Elliot Mathieu, Véronique Robert, Sabine Riffault, Bart N. Lambrecht, Philippe Langella, Hamida Hammad, Muriel Thomas · 发表于：The ISME Journal · 年份：2017 · DOI：10.1038/ismej.2016.181 · 被引用次数：104 · 研究领域：Asthma and respiratory diseases、Gut microbiota and health、Pediatric health and respiratory diseases

Asthma is a chronic, non-curable, multifactorial disease with increasing incidence in industrial countries. This study evaluates the direct contribution of lung microbial components in allergic asthma in mice. Germ-Free and Specific-Pathogen-Free mice display similar susceptibilities to House Dust Mice-induced allergic asthma, indicating that the absence of bacteria confers no protection or increased risk to aeroallergens. In early life, allergic asthma changes the pattern of lung microbiota, and lung bacteria reciprocally modulate aeroallergen responsiveness. Primo-colonizing cultivable strains were screened for their immunoregulatory properties following their isolation from neonatal lungs. Intranasal inoculation of lung bacteria influenced the outcome of allergic asthma development: the strain CNCM I 4970 exacerbated some asthma features whereas the pro-Th1 strain CNCM I 4969 had protective effects. Thus, we confirm that appropriate bacterial lung stimuli during early life are critical for susceptibility to allergic asthma in young adults.