Analytical Sciences

Abstract − Analytical Sciences, 35(8), 835 (2019).

A Detection Method for GLUT4 Exocytosis Based on Spontaneous Split Luciferase Complementation
Mizuki ENDO, Masashi MIYASAKI, Qiaojing LI, Genki KAWAMURA, and Takeaki OZAWA
Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
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.