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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Leukotriene D4 receptor antagonism reduces airway hyperresponsiveness in monkeys.

Airway hyperresponsiveness (AHR) and pulmonary inflammation are observations that are consistently associated with asthma and also occur in a well-characterized monkey model of asthma. The following study was performed to determine whether treatment with an LTD4 receptor antagonist, ICI 198,615, could attenuate antigen-induced pulmonary inflammation and AHR in monkeys using the following protocol. On day 0, the PC200 (the concentration of methacholine (MCh) that doubled respiratory system resistance, Rrs) was determined in 6 male, atopic, cynomolgus monkeys, previously characterized in historical control trials (Control #1) as airway hyperresponsive. Bronchoalveolar lavage (BAL) was then performed to determine total and differential leukocyte counts. On days 3, 5 and 7, each monkey received 10 mg/kg ICI 198,615 (im) 30 min prior to Ascaris suum (Ag) aerosol exposures which doubled Rrs. On day 10, the post-Ag PC200 to MCh was determined and BAL was repeated. Five weeks after this trial was complete, a bracketing control trial (Control #2) was performed in which the monkeys were administered vehicle prior to each Ag exposure. In comparison to the response in both control trials, treatment with the LTD4 antagonist significantly (P < 0.05) inhibited the development of AHR and also significantly reduced (P < 0.05) peripheral blood lymphocyte counts after Ag challenge. Treatment with ICI 198,615 reduced the Ag-induced increase in BAL eosinophils, but statistical significance was obtained only when treated animals were compared to Control #1, not Control #2.(ABSTRACT TRUNCATED AT 250 WORDS)[1]

References

  1. Leukotriene D4 receptor antagonism reduces airway hyperresponsiveness in monkeys. Turner, C.R., Smith, W.B., Andresen, C.J., Swindell, A.C., Watson, J.W. Pulmonary pharmacology. (1994) [Pubmed]
 
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