Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học 'Respiratory Research cung cấp cho các bạn kiến thức về ngành y đề tài: " JNK activation is responsible for mucus overproduction in smoke inhalation injury. | Choi et al. Respiratory Research 2010 11 172 http content 11 1 172 RESPIRATORY RESEARCH RESEARCH Open Access JNK activation is responsible for mucus overproduction in smoke inhalation injury 2 3 4 2 2 3 Won-II Choi Olga Syrkina Kun Young Kwon Deborah A Quinn Charles A Hales Abstract Background Increased mucus secretion is one of the important characteristics of the response to smoke inhalation injuries. We hypothesized that gel-forming mucins may contribute to the increased mucus production in a smoke inhalation injury. We investigated the role of c-Jun N-terminal kinase JNK in modulating smoke-induced mucus secretion. Methods We intubated mice and exposed them to smoke from burning cotton for 15 min. Their lungs were then isolated 4 and 24 h after inhalation injury. Three groups of mice were subjected to the smoke inhalation injury 1 wild-type WT mice 2 mice lacking JNK1 JNK1- - mice and 3 WT mice administered a JNK inhibitor. The JNK inhibitor SP-600125 was injected into the mice 1 h after injury. Results Smoke exposure caused an increase in the production of mucus in the airway epithelium of the mice along with an increase in MUC5AC gene and protein expression while the expression of MUC5B was not increased compared with control. We found increased MUC5AC protein expression in the airway epithelium of the WT mice groups both 4 and 24 h after smoke inhalation injury. However overproduction of mucus and increased MUC5AC protein expression induced by smoke inhalation was suppressed in the JNK inhibitor-treated mice and the JNK1 knockout mice. Smoke exposure did not alter the expression of MUC1 and MUC4 proteins in all 3 groups compared with control. Conclusion An increase in epithelial MUC5AC protein expression is associated with the overproduction of mucus in smoke inhalation injury and that its expression is related on JNK1 signaling. Introduction Smoke inhalation injury is a serious threat to victims of house fires explosions and .
