| 光谱学与光谱分析 |
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| Low Level Laser Irradiation in the Visible Spectra Induces HeLa Cells Proliferation |
| YANG Hong-qin, WANG Yu-hua, CHEN Jiang-xu, ZHENG Li-qin, XIE Shu-sen |
| Institute of Laser and Optoelectronics Technology, Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of Opto-Electronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou 350007, China |
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Abstract The aim of this in vitro study was to evaluate the effects of low level laser irradiation on the proliferation of HeLa cells using 405 nm diode laser, 514 nm argon laser, 633 nm He-Ne laser, or 785 nm diode laser. The cells were seeded on 96-well microplates for 24 h in 5% fetal bovine serum containing medium, then irradiated with the laser at dose of 100 and 1 000 J·m-2, respectively. At the time point of 24, 48, 72 h after irradiation, cell viability was assessed by MTT assay. The results show that 405, 633 and 785 nm laser irradiation induces wavelength-dependent and time-dependent proliferation. 633 nm laser irradiation results in a stimulatory proliferation effect that is most significant, whereas 514 nm laser irradiation produces little increase in cell proliferation. Low level laser irradiation increases cell proliferation in a dose-dependent manner. 1 000 J·m-2 laser irradiation is more effective in increasing cell proliferation than 100 J·m-2 laser irradiation using 405 nm diode laser, 633 nm He-Ne laser, or 785 nm diode laser, but not as effective as using 514 nm argon laser.
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Received: 2011-09-05
Accepted: 2011-11-30
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Corresponding Authors:
YANG Hong-qin
E-mail: hqyang@fjnu.edu.cn
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