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. Author manuscript; available in PMC: 2022 Jul 1.
Published in final edited form as: J Photochem Photobiol B. 2021 May 12;220:112212. doi: 10.1016/j.jphotobiol.2021.112212

Figure 1. Vasodilatory effect of red light.

Figure 1.

A: Laser doppler measurement of blood flow in hind limb of C57BI/6 mice. 670 nm light was applied at increasing intensities (25, 50, 100 mW/cm2) for 15 min. The flow was measured as a difference between the irradiated limb and the other (control) limb of each animal. Upper: Representative image. Lower: Quantification. Values are mean±SE, *p<0.005, **p<0.001 vs. Control B: Red light induces exertion of stable vasodilatory agent from pre-constricted murine facialis arteries. Red light (670 nm, 6 J/cm2) induced dilation of primary blood vessel as measured by pressure myography. The bath buffer was collected, and after 30 min transferred to dilate a second naïve vessel..