Abstract
Glucose transporter 4 (GLUT4) is an insulin-regulated glucose transporter, which is vital for blood glucose homeostasis. To clarify the physiological roles of GLUT4, quantitative measurement of GLUT4 exocytosis is indispensable. Herein, we show a rapid detection system for GLUT4 on the cell surface using spontaneous split-luciferase reconstitution. Upon insulin-induced GLUT4 exocytosis, GLUT4 was exposed outside, where luciferase is reconstituted and emitted luminescence. Pretreatment with inhibitors reduced the insulin-induced signal elevation. The results indicate that the developed method is applicable to high-throughput analysis on GLUT4 trafficking, which will greatly accelerate comprehensive research on the physiological roles of GLUT4.
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