Figure 5. Synthesis of Glut-4 in GLS incubated either with different amounts of glucose or with NO.
Typically 30 to 40 mg of GLS in HEPES buffer, pH 7.4, was incubated with different concentrations of glucose (0-0.05M) as shown or in the presence of 2.5nmol NO solution in 0.9% NaCl or in the presence of both 0.02M glucose and 2.5nmol NO solution for 30 min at 37°C. In parallel experiments, 0.1mM NAME was added to the reaction mixture containing 0.02M glucose. After incubation for 30 min at 37°C, the amounts of Glut-4 produced in the reaction mixture were determined by ELISA using Glut-4 antibody. The amount of Glut-4 produced in the reaction mixture was determined by expressing the increase of the arbitrary optical densities at 405 nm.
▓ - Glut-4 synthesis in the presence of varying amounts of glucose; ≡ - Glut-4 synthesis in the presence of both glucose and NO; □- synthesis of Glut-4 in the presence of only NO; ■- Glut-4 synthesis in the presence of glucose and NAME.
Results shown are mean ± S.D. of the optical densities obtained from 6 experiments by using 6 different animals.