Diode laser-induced mitosis in the rabbit retinal pigment epithelium.


BACKGROUND AND OBJECTIVE The induction of retinal pigment epithelium (RPE) proliferation without damaging the inner layers of the retina might be helpful in patients with RPE atrophic changes and degeneration. This study aimed to induce mitosis in the RPE of the rabbit after subthreshold photocoagulation with the diode laser. MATERIALS AND METHODS Twenty-five male Dutch rabbits received retinal photocoagulation using an 810-nm diode laser with different power settings and exposure times. The eyes were processed for light microscopy, electron transmission microscopy, and immunohistochemistry. RESULTS Neither morphological alterations nor mitotic activity was found after 5-mJ energies. Retinal layers were not affected and RPE hyperplasia appeared in the treated areas associated with mitotic activity when 10 mJ was used. Mitosis induction and retinal damage appeared with 20, 50, and 100 mJ and were associated with ophthalmoscopic damage. CONCLUSIONS The use of subthreshold 810-nm diode laser treatment may induce mitosis in the RPE without causing damage to the neighboring layers.

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@article{Colom2007DiodeLM, title={Diode laser-induced mitosis in the rabbit retinal pigment epithelium.}, author={J. Gregori Colom{\'e} and Jos{\'e} Mar{\'i}a Ruiz-Moreno and Javier Antonio Montero and Eduardo Fern{\'a}ndez}, journal={Ophthalmic surgery, lasers & imaging : the official journal of the International Society for Imaging in the Eye}, year={2007}, volume={38 6}, pages={484-90} }