Enzymatic activities in the iris-ciliary body of the rabbit eye during experimentally induced acute ocular inflammation
作者:
PhylactosAndreas C.,
UngerWilliam G.,
GriersonIan,
期刊:
Current Eye Research
(Taylor Available online 1987)
卷期:
Volume 6,
issue 7
页码: 865-883
ISSN:0271-3683
年代: 1987
DOI:10.3109/02713688709034856
出版商: Taylor&Francis
数据来源: Taylor
摘要:
Intravitreal injection of 5μg ofShigellaendotoxin, in the rabbit eye, induced an acute inflammatory response which was characterised by conjunctival hyperaemia, limbal and ciliary vascular injection, iritis, aqueous flare, miosis and reduction in intraocular pressure. Irisciliary body tissues, from normal and inflamed eyes, were fractionated into subcellular enriched fractions and the activities and distribution of selected enzymes were estimated. Alkaline phosphatase, a plasma membrane-bound enzyme, showed an increase in activity, whereas succinate dehydrogenase and Mn-Superoxide dismutase, both mitochondrial-bound enzymes, exhibited decreased activities. Lysosomal acid phosphatase displayed an increase in free activity and retention of latent activity inside the organelle. NO alteration in free activity was shown by acid cathepsin. The cholinesterases did not exhibit any changes in activities nor did the cytosolic enzymes Cu/Zn-superoxide dismutase and lactate dehydrogenase. The decreased activity of the respiratory mitochondrial enzyme succinate dehydrogenase may contribute to the reduction in intraocular pressure, and the ability of the lysosomal organelles to retain their hydrolytic enzymes, ensures recovery of the cell from acute inflammatory attack.
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