Abstract
Light-emitting diodes (LED) have recently been introduced as a potential factor for proliferation of various cell types in vitro. Nowadays, stem cells are widely used in regenerative medicine. Human umbilical cord matrix-derived mesenchymal (hUCM) cells can be more easily isolated and cultured than adult mesenchymal stem cells. The aim of this study was to evaluate the effect of red and green lights produced by LED on the proliferation of hUCM cells. hUCM cells were isolated from the umbilical cord, and light irradiation was applied at radiation energies of 0.318, 0.636, 0.954, 1.59, 3.18, 6.36, 9.54, and 12.72 J/cm2. Irradiation of the hUCM cells shows a significant (p < 0.05) increase in cell number as compared to controls after 40 h. In addition, cell proliferation on days 7, 14, and 21 in irradiated groups were significantly (p < 0.001) higher than that in the non-irradiated groups. The present study clearly demonstrates the ability of red and green lights irradiation to promote proliferation of hUCM cells in vitro. The energy applied to the cells through LED irradiation is an effective factor with paradoxical alterations. Green light inserted a much profound effect at special dosages than red light.
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Acknowledgments
S. Dehghani-soltani was a MSc student at Department of Anatomy, Afzalipour School of Medicine, Kerman, Iran.
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Institutional ethical review board committee at Kerman University of Medical Sciences, Kerman, Iran, approved the study. A written consent was taken from parents for the use of umbilical cord.
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Kerman University of Medical Sciences Research affair supported this research by a grant numbered 92–58.
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The authors declare that they have no conflict of interest
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The mothers donated umbilical cords after a written informed consent was obtained
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Dehghani Soltani, S., Babaee, A., Shojaei, M. et al. Different effects of energy dependent irradiation of red and green lights on proliferation of human umbilical cord matrix-derived mesenchymal cells. Lasers Med Sci 31, 255–261 (2016). https://doi.org/10.1007/s10103-015-1846-y
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DOI: https://doi.org/10.1007/s10103-015-1846-y