Effect of hyaluronidase on aqueous outflow resistance in normotensive and glaucomatous eyes of dogs.
The anterior chambers in 16 dogs with normotensive eyes and 3 Beagles with glaucomatous eyes were treated with 0, 25, 50, or 100 IU of bovine testicular hyaluronidase. Aqueous outflow resistance was then determined by constant-pressure perfusion of 0.9% NaCl solution for 30 or 60 minutes. In normotensive eyes, 25, 50, or 100 IU of hyaluronidase significantly (P less than 0.02) increased the rate of constant-pressure perfusion compared with that of untreated eyes during 30- or 60-minute perfusions. Treatment of glaucomatous eyes with 25, 50, or 100 IU of hyaluronidase did not significantly increase the rate of constant-pressure perfusion over controls during a 30-minute perfusion. Bovine testicular hyaluronidase at all doses removed the staining of colloidal iron from the trabecular meshwork in normotensive eyes. In Beagles with glaucoma, the trabecular meshworks remained stained with colloidal iron when treated with the hyaluronidase, which suggested that some glycosaminoglycans were resistant to this enzyme's action.
Gum
G G
GG
Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville 32610-0126.
Samuelson
D A
DA
Gelatt
K N
KN
D000818:Animals; D000867:Anterior Chamber / Q000187:drug effects / Q000503:physiopathology; D004283:Dog Diseases / Q000188:drug therapy* / Q000503:physiopathology; D004285:Dogs; D005901:Glaucoma / Q000188:drug therapy / Q000503:physiopathology / Q000662:veterinary*; D006025:Glycosaminoglycans / Q000032:analysis; D006821:Hyaluronoglucosaminidase / Q000494:pharmacology / Q000627:therapeutic use*; D007429:Intraocular Pressure / Q000187:drug effects*; D008854:Microscopy, Electron; D011897:Random Allocation; D014129:Trabecular Meshwork / Q000187:drug effects* / Q000648:ultrastructure
D006025:Glycosaminoglycans; D006821:Hyaluronoglucosaminidase