RESPONSE OF LOW INTENSITY LASER IRRADIATION ON COLLAGEN PRODUCTION IN DIABETIC WOUNDED FIBROBLAST CELLS IN VITRO S.M. Ayuk, N.N. Houreld and H. Abrahamse.

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RESPONSE OF LOW INTENSITY LASER IRRADIATION ON COLLAGEN PRODUCTION IN DIABETIC WOUNDED FIBROBLAST CELLS IN VITRO S.M. Ayuk, N.N. Houreld and H. Abrahamse Laser Research Centre, Faculty of Health Sciences SAIP, 10 th July 2012

INTRODUCTION Diabetes Mellitus Hyperglycaemia ROS and AGES Impaired Wound Healing Hypoxia Impaired angiogenesis and neo vascularization Decreased host immunity Neuropathy Increased MMPs Keratinocyte and fibroblast malfunction Adapted from Guo S and DiPietro L A 2010 J Dent Res 89(3):

Response of Low Intensity Laser Irradiation (LILI) on Wound Healing (WH) & Collagen ( Production in Diabetic Ulcers (DU) Response of Low Intensity Laser Irradiation (LILI) on Wound Healing (WH) & Collagen (Col-  ) Production in Diabetic Ulcers (DU) Houreld N and Abrahamse H 2007 Photomed Laser Surg 25 Lucas C, Criens-Poublon L J, Cockrell C T and de Haan R J Lasers Med Sci 17

AIM  Determine if LILI at a wavelength of 660 nm at a fluence of 5 J/cm 2 enhances collagen production in an in vitro diabetic wounded model

Incubation at 48 h, 72 h METHODOLOGY Isolated Skin Fibroblast Culture NormalDiabetic Wounded Irradiation 5 J/cm 2, 660 nm Morphology Microscopy Viability Trypan Blue Proliferation Vision Blue MTT Col-  ELISA Non-Irradiation 0 J/cm 2 fibroblasts “wound” CS n=4

RESULTS-MORPHOLOGY

VIABILITY *** = P < 0.001* = P < 0.05

CELL PROLIFERATION *** = P < 0.001

COLLAGEN PRODUCTION ***= P< 0.001

CONCLUSION  LILI influences collagen production in vitro and positively effects diabetic cells stimulating wound healing  LILI increases cell proliferation at fluence of 5 J/cm 2 and 660 nm  LILI does not distort the cell membrane

ACKNOWLEDGEMENTS Thank youThank you