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. 2014 Aug 22;5:305. doi: 10.3389/fphys.2014.00305

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Copyright © 2014 Keszler, Brandal, Baumgardt, Ge, Pratt, Riess and Bienengraeber.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Wavelength-dependence of NIR-induced NO release is in accordance with wavelength dependence of cardioprotection. (A) A solution of HbNO or MbNO (10 μM in PBS, pH 7.4) was irradiated at various wavelengths with 10 mW/cm² power for 1 min in the chamber of the NO analyzer. Formation of NO was on-line detected with ozone-based chemiluminescence. Maximum NO liberation was achieved at 660 nm irradiation with both heme nitrosyl compounds. Values are means ± SE, n = 3. (B) The exposed heart was irradiated at various wavelengths at170 mW/cm² irradiance for 1 min during ischemia, and 4 min during reperfusion. Irradiation at 670 nm was the most cardioprotective. Values are means ± SD, ^*p < 0.05 when compared to untreated control (CON).