Impacts of various intensity red lasers at 635 nm on colon cancer cells

Abstract

With low-level laser treatment, this study aims to determine whether different intensities may promote prevent or accelerate cell growth. Different power densities were used to irradiate colon cancer cells. Laser irradiation at 5 J/cm2 with a wavelength of λ-635 nm was done continuously. The experimental groups were designed to achieve the following results: The control group was the non-irradiated group, and the irradiated experimental group was as follows: the first group the power of 70 mW and intensity of 61.94 mW/cm2 was the second; 90 mW and 79.64 mW/cm2 were the third; 110 mW and 97.3 mW/cm2 were the fourth; and 130 mW and 115 mW/cm2 were the fifth group. Changes in cell proliferation have been examined using MTT assays. The findings showed that different power densities enabled noticeable alterations in the cells. They concluded that at a certain power density, cells react optimally.