Figure 5: GLP-1 rescues AMPK activator AICAR-induced cell death, apoptosis and AMPK activation in RINm5F cells.

(A) Cell viability was measured by MTT assay in different concentration of AICAR at indicated time. Data are shown as relative cell viability (mean % ± S.E. bar) as compared with that in control (n = 3). *p < 0.05. (B) Cell viability was measured by MTT assay in cells treated by 1 mM MG or 1.5 mM AICAR for 17 hr with or without pretreatment of 300 nM GLP-1 (n = 3). *p < 0.05. (C) Western blot of p-ACC/ACC and p-AMPK/AMPK in cells treated by 1 mM MG or 1.5 mM AICAR for 17 hr with or without pretreatment of 300 nM GLP-1. GAPDH was used as internal control. (D) Western blot of PARP in cells treated by 1 mM MG or 1.5 mM AICAR for 17 hr with or without pretreatment of 300 nM GLP-1. GAPDH was used as internal control. (E) Cell viability was measured by MTT assay in different concentration of metformin at indicated time. Data are shown as relative cell viability (mean % ± S.E. bar) as compared with that in control (n = 3). (F) Cell viability was measured by MTT assay in cells treated by 1 mM MG for 17 hr with pretreatment of different concentration of metformin. Data are shown as relative cell viability (mean % ± S.E. bar) as compared with that in control (n = 3).