Chemiluminescence response of human neutrophils to He-Ne laser irradiation (in vivo and in vitro)

He-Ne laser irradiation (0.01-6 J/cm 3 ) of the blood and neutrophile suspension in vitro was shown to modulate reactive oxygen species (ROS) production in healthy donors. Intravascular laser irradiation of the blood (5 mW, 30 minutes, daily) of the patients with chronic gastric ulcer during first 5 days resulted in increasing stimul-induced ROS production in patients with the low initial chemiluminescence response and its decreasing in patients with the high initial chemiluminescence response