IL-4Rα and IL-2Rγc Expression in huASMC. A: IL-4Rα and IL-2Rγc expression in huASMC at baseline. Unstarved huASMC lysates were subjected to western blot analysis for IL-4Rα and IL-2Rγc using polyclonal anti-IL-4Rα (1:500 dilution, Santa Cruz), or monoclonal anti-IL-2Rγc (1:125 dilution, R&D Systems, Inc.). The nitrocellulose membranes were incubated with a 1:1,000 dilution of anti-rabbit or anti-mouse horseradish peroxidase linked whole antibody (Amersham). The immunoreactive protein bands were detected by ECL (Amersham). IL-2Rγc is minimally expressed in huASMC while IL-4Rα is expressed abundantly in huASMC.