Figure 2.
Endothelium-dependent and endothelium-independent vasorelaxation in wild-type (wt) or transgenic mice overexpressing human thioredoxin-2 (TghTrx2) with or without chronic angiotensin II (Ang II) infusion: Aortic segments (3mm) were mounted in isolated organ chamber baths and basal tension adjusted to 1 gram. Vascular relaxations to increasing concentrations of acetylcholine (A) and the nitric oxide donor, DEA-NONOate (B) were measured after preconstriction with PGF2α. The contractile response to increasing concentration of phenylephrine (Pe) is shown in C; previous addition of L-NAME (100µmol/, D) strikingly increased this response in all groups. Mean ± SEM, n = 4–7.