ABSTRACT
Objective To investigate the effect of exogenous atrial natriuretic peptide on airway inflammation in allergic asthma mice model and its mechanism.Methods A total of 48 SPF 48 BALBc mice were selected and randomly divided into the normal group (equal quantity normal saline intervention),model group (equal quantity normal saline intervention),experimental group A (exogenous atrial natriuretic peptide 0.5 μg/g) and experimental group B(exogenous atrial natriuretic peptide 0.5 μg/g-+-A71915).The model group,experimental group A and B were given the corresponding treatment measures after successfully constructing the model,at 24 after the last provocation test,serum and bronchoalveolar lavage fluid in each group were collected for detecting inflammation factors.The HE staining was used to observe the pathological changes of lung tissue,the expression level of GATA3 protein in lung tissue was detected by Western blot technology.Results The blood EOS,lymphocyte and neutrophil ratio in the model group were higher than those in the normal group (P＜0.05),which in the experimental group A were higher than those in the model group and experimental group B (P＜0.05);bronchoalveolar lavage fluid EOS,lymphocytes,neutrophil ratio,IL-6,TNF-α levels in the model group were higher than those in the normal group (P＜0.05),alveolar lavage fluid EOS,lymphocyte,neutrophil count,IL-6 and TNF-α levels in the experimental group A were higher than those in the model group and experimental group B (P＜0.05);the expression level of GATA3 protein in lung tissue of the model group was higher than that in the normal group(P＜0.05),the expression level of lung tissue GATA3 protein in the experimental group A was higher than that in the model group and experimental group B (P＜0.05).Conclusion Exogenous atrial natriuretic peptide can further aggravate airway inflammation reaction in allergic asthma mice model,which is related to the activation of inflammatory cells,the release of inflammatory cytokines and the increase of GATA3 protein expression in lung tissue.
ABSTRACT
OBJECTIVE:To observe the clinical efficacy and safety of noninvasive mechanical ventilation combined with aero-sol inhalation drug in the treatment of AECOPD complicating with respiratory failure. METHODS:90 patients diagnosed as AECO-PD complicating with respiratory failure were selected and randomly divided into observation group and control group,with 45 cas-es in each group. Both groups received routine treatment as oxygen supply at low flow rate,anti-infection,relieving asthma,venti-lation,cardiotonic,spasmolysis and nutritional support. Control group received noninvasive mechanical ventilation;observation group was additionally given aerosol inhalation of Budesonide atomized liquid+terbutaline+ipratropium bromide,bid. Both groups received 7 d of treatment. Clinical efficacy of 2 groups were compared as well as pH value,PaCO2,PaO2,HR,RR and PEF lev-els before and after treatment. The occurrence of ADR was observed. RESULTS:Total effective rate of observation group was 93.3%,which was significantly higher than 73.3% of control group,with statistical significance(P0.05). pH value,PaO2 and PEF of 2 groups increased after treatment,while PaO2,HR and RR decreased;the observation group was better than the con-trol group,with statistical significance(P<0.05). No obvious ADR was found in 2 groups. CONCLUSIONS:Noninvasive me-chanical ventilation combined with aerosol inhalation drug is effective in the treatment of AECOPD complicating with respiratory failure,and can effectively improve blood gas indexes,HR,RR and PEF with good safety.