Disclosed herein are compounds, compositions and methods for modulating the expression of PTPR.alpha. in a cell, tissue or animal. Also provided are methods of target validation. Also provided are uses of disclosed compounds and compositions in the manufacture of a medicament for treatment of diseases and disorders. Also provided are methods for the prevention, amelioration and/or treatment of airway hyperresponsiveness and pulmonary inflammation by administration of antisense compounds targeted to PTPR.alpha.