The changes of vitreous pH values in an acute glaucoma rabbit model

Journal of Ocular Pharmacology and Therapeutics : the Official Journal of the Association for Ocular Pharmacology and Therapeutics
D W LuJ N Wu

Abstract

The changes of vitreous pH values under acute glaucoma status have never been reported. In this study, we measured the changes of vitreous pH values in an acute glaucoma rabbit model. Under ketamine and xylazine anesthesia, the anterior chamber of the right eye of New Zealand white rabbits was cannulated and connected to a polygraph for continuous intraocular pressure (IOP) monitoring and a mini-pump for persistent injection of viscoelastic substance, Healon GV. The measurement of vitreous pH was done by inserting a pH probe via a third opening through the sclera into the vitreous. Different IOP levels were maintained by varied amounts of Healon GV injections into the anterior chamber. The changes of vitreous pH values following the intracameral injections were recorded and evaluated. The changes of vitreous pH values were minimal when IOPs were maintained at lower than 35 mmHg. Vitreous pH values decreased significantly from 7.32 to less than 7.03, when the IOPs were kept at 70 mmHg or higher. However, the decrease of pH values was reversible if IOP was held at 70 mmHg for less than 10 minutes and then reduced to normal level at once. In addition, with MTT viability assay, it was noted that the decrease in vitreous pH was asso...Continue Reading

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Citations

Nov 13, 2012·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Da-Wen LuYi-Hao Chen
Mar 10, 2010·Applied Biochemistry and Biotechnology·Hisashi JohnoMasanori Kitamura
Jun 3, 2011·Journal of Ocular Pharmacology and Therapeutics : the Official Journal of the Association for Ocular Pharmacology and Therapeutics·Dennis P HanBrian Higgins
Jan 24, 2013·PloS One·José-Daniel Aroca-AguilarJulio Escribano
Feb 4, 2016·The British Journal of Radiology·Kadir AgladiogluYilmaz Kiroglu
Jun 13, 2006·American Journal of Ophthalmology·Guy J Ben SimonMordechai Rosner
Sep 19, 2002·The Journal of Biological Chemistry·Christina MeyerS Patricia Becerra
Dec 2, 2020·Channels·Jasdip Singh DulaiTaufiq Rahman

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