Inhibition of recombinant human PDE4B1 using [3H]-cAMP as substrate preincubated for 15 mins followed substrate addition measured after 60 mins by scintillation proximity assay
Antiinflammatory activity in Sprague-Dawley rat LPS-induced neutrophilia model assessed as inhibition of LPS-induced increase in netrophils in bronchoalveolar lavage at 1000 ug/kg, it administered single dose as microspray dosed 1 hr prior to nebulized LPS challenge measured after 4 hrs by flow cytometric analysis
Antiinflammatory activity in Sprague-Dawley rat LPS-induced neutrophilia model assessed as inhibition of LPS-induced increase in netrophils in bronchoalveolar lavage at 100 to 3000 ug/kg, it administered as single dose via dry powder insufflator dosed 1 to 18 hrs prior to nebulized LPS challenge measured after 4 hrs by flow cytometric analysis
Pro-inflammatory activity in Sprague-Dawley rat assessed as increase in neutrophils in bronchoalveolar lavage at 1000 ug/kg, it administered as single dose via dry powder insufflator after 18 hrs post dose by flow cytometric analysis relative to basal level
Pro-inflammatory activity in Sprague-Dawley rat assessed as increase in neutrophils in bronchoalveolar lavage at 3000 ug/kg, it administered as single dose via dry powder insufflator after 18 hrs post dose by flow cytometric analysis relative to basal level