A- Changes in diameter in response to stepwise increases in intraluminal flow were determined in caudal arteries submitted to a pressure of 75mmHg and preconstricted with phenylephrine. Flow-mediated dilation is expressed as percentage dilation of active tone by flow.
B- Flow-induced dilation (in μm change in diameter) is expressed as a function of shear stress. Caudal arteries were isolated from wild-type (n=12) and transgenic mice (n=9 and n=10, lines TgMa and TgVe respectively).
*P <0.001; two-factor ANOVA, transgenic versus wild-type mice.