Preventive effect of DNA vaccine based on xenogeneic homologous calciumactivated chloride channel on airway hyperresponsiveness in asthmatic mice
- VernacularTitle:钙激活Cl-通道基因疫苗对哮喘小鼠气道高反应性的预防作用
- Author:
Liqiang SONG
;
Yan LI
;
Haowen QI
;
Jicun WANG
;
Lening ZHANG
- Publication Type:Journal Article
- Keywords:
Asthma;
Airway hyperresponsiveness;
Vaccines, DNA;
Chloride channels, calcium-activated
- From:
Chinese Journal of Pathophysiology
1999;0(09):-
- CountryChina
- Language:Chinese
-
Abstract:
AIM: To observe the preventive effect of DNA vaccine based on human calcium-activated chloride channel 1 (hCLCA1) on airway hyperresponsiveness in asthmatic mice.METHODS: The DNA vaccine was constructed by inserting the hCLCA1 gene into pSecTag-2A, and then BALB/c mice were vaccinated by im. once every two weeks. Serum antibody was checked with the antigen of mCLCA3 by ELISA analysis. Asthma was induced with ovalbumin in the vaccinated mice. The airway pressure time index (APTI), the contractile responsiveness of isolated tracheal rings and the number of eosinophil in bronchoalveolar lavage (BAL) were investigated. Mice injected with pSecTag-2A, saline or normal mice were regarded as control groups. RESULTS: The title of antiserum binding to mCLCA3 in vaccine group was 1∶800 to 1∶(1 000) after three times vaccination. Compared with normal group, APTI, contractile responsiveness and number of eosinophil in vaccine group, pSecTag-2A or saline group were increased markedly (P
