Fig. 6

(a) Observed 5-OH SAX DPP-4 inhibition ratio versus predicted data. The linear line is red and the OV vs. PRE points are black solid square. (b) The PD profiles of 5-OH SAX in T2DM rats following a tail vein dose of 0.5 mg/kg. The blue solid points represent observed DPP-4 inhibitory (n=3). The red solid line represents model fitting curve. (c) The dose-effect curve of 5-OH SAX in T2DM rats. The arrow indicates that the efficacy of the drug shows a downward trend with the time of administration