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[Effect of ketotifen on the eicosanoid system, immunoreactivity and bronchial patency in patients with obstructive pulmonary diseases].

A study was made of the effect of ketotifen on the concentration of leukotriene B4, prostacyclin and thromboxane A2 in the liquid of bronchoalveolar lavage and on external respiration and cellular immunity during 4 weeks of the treatment of patients with infection-dependent bronchial asthma and chronic obstructive bronchitis. Inclusion of ketotifen into the treatment of patients with bronchial obstruction exerts a stimulating action on the suppressor component of T-cell immunity, leads to a decrease of the content of leukotriene B4 and thromboxane A2 in the lavage liquid, which is accompanied by positive shifts in the clinical course of the broncho-obstructive syndrome. Ketotifen turned out most effective in patients with an initially low content of the subpopulation of T suppressors and with high concentrations of leukotriene B4 and thromboxane A2 in the liquid of bronchoalveolar lavage.