Paper Details


Paper Code :  12588388


Paper Title   :  Direct stimulatory effect of low-intensity 670 nm laser irradiation on human endothelial cell proliferation

Journal Title   :  The British journal of dermatology



Reference

Br J Dermatol. 2003 Feb;148(2):334-6.

Schindl A, Merwald H, Schindl L, Kaun C, Wojta J.

Department of Dermatology (Division of Special and Environmental Dermatology), University of Medical School, W√§hringer G√ľrtel 18-20, A-1090 Vienna, Austria.

Abstract
BACKGROUND:
Endothelial cell (EC) proliferation plays a key role in the process of tissue repair. Low-intensity laser irradiation has been demonstrated to accelerate wound healing and to improve microvascularization.

OBJECTIVES: The present study evaluated a possible stimulatory influence of low-intensity laser irradiation on human umbilical vein endothelial cell (HUVEC) proliferation in a systematic manner.

METHODS: Subconfluent cultures of HUVEC were irradiated every other day with a 670-nm diode laser (intensity: 10-65 mW cm(-2), dose: 2-8 J cm(-2)) during a period of 6 days. Cell proliferation was evaluated quantitatively by counting in a haemocytometer.

RESULTS: Our data demonstrate a dose-dependent and intensity-dependent stimulatory effect of laser irradiation on HUVEC cell proliferation. Doses of between 2 and 8 J cm(-2) induced statistically significant cell proliferation. Testing different intensities at a constant dose of 8 J cm(-2), 20 and 65 mW cm(-2) induced most pronounced cell proliferation.

CONCLUSIONS: Low-intensity laser irradiation influences EC proliferation and might thereby contribute to the increase in angiogenesis and the acceleration of wound healing in vivo.



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