Mice mode of high intraocular pressure established by laser photocoagulation

Abstract

AIM:To establish an experimental model of high intraocular pressure in mice by laser photocoagulation and to prepare for future research. METHODS: Experimental model of high intraocular pressure was induced unilaterally in 44 C57BL/6 mice. The fellow eye served as a control. TONO-PEN AVIA Tonomter was used to measure intraocular pressure(IOP)to guarantee IOP value at 1, 2, 4, 8wk. Slit-lamp biomicroscopy was performed throughout the period and the structural changes were assessed histologically. And then, their eyes were enucleated, postfixed, cryoprotected, and embedded in optimal cutting temperature medium. After hematoxylin and eosin stain(HE stain), cryosections of the retina were observed under light microscope. TdT-mediated biotin-dUTP nick end labeling(TUNEL)was performed on the retinal sections to determine apoptosis rate. RESULTS: IOP of laser-treated eyes was significantly higher than that of control eyes from 1-8wk(PCONCLUSION: The laser photocoagulation of limbus causes chronic elevation of IOP and this method may be a promising experimental model for the investigation of biological mechanisms of glaucomatous retinal ganglion cell damage.

Keywords

• high intraocular pressure
• mouse
• experimental model of high intraocular pressure