Research Article

Panax Notoginseng Protects against Diabetes-Associated Endothelial Dysfunction: Comparison between Ethanolic Extract and Total Saponin

Figure 4

AMPK and ER stress modulates the beneficial effect of PNS and PNE on endothelial function. (a, b) Effect of AMPK inhibitor Compound C (5 μM) on ACh-induced EDRs in mouse aortas treated with high glucose (HG, 30 mM), PNS (10 μg/mL) and PNE (100 μg/mL) for 48 h. Effect of pretreatment with ER stress inducer tunicamycin (Tuni, 2 μg/mL, 24 h) and cotreatment with PNS (10 μg/mL) or PNE (100 μg/mL) on (C and D) ACh-induced and (e) SNP-induced relaxations in mouse aortas. Data are of 4 experiments. vs. normal glucose (NG, 5.5 mM with mannitol) or control; vs. HG or Tuni; vs. HG+PNS, HG+PNE, Tuni+PNS, or Tuni+PNE.
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