Increased ocular blood flow and /sup 125/I-albumin permeation in galactose-fed rats: inhibition by sorbinil

Journal Article · Wed Jun 01 00:00:00 EDT 1988 · Invest. Ophthalmol. Visual Sci.; (United States)

OSTI ID:6975074

Tilton, R G; Chang, K; Weigel, C; Eades, D; Sherman, W R; Kilo, C; Williamson, J R

125I-Albumin permeation and blood flow (assessed with 15 micron, 85Sr-labelled microspheres) were determined in the retina, choroid, anterior uvea, and brain of male Sprague-Dawley rats fed diets containing 50% dextrin (control) or 50% galactose. Blood flow was increased in the retina, choroid, and anterior uvea but not in the brain of rats fed galactose for 3 weeks and 3 months versus controls, and was normalized by sorbinil (an inhibitor of aldose reductase) in the 3-week group. After 8 months of galactose feeding, blood flow was reduced to normal levels in the retina and was slightly below normal in the choroid; blood flow remained elevated in the anterior uvea but was significantly lower than that observed at 3 weeks and at 3 months. In rats fed galactose for 8 months, sorbinil completely normalized blood flow in the choroid, and decreased, but did not normalize, blood flow in the anterior uvea. 125I-Albumin permeation was increased in the retina, choroid, and anterior uvea of rats fed 50% galactose for 3 weeks, 3 months, and 8 months versus controls, but was unchanged in the brain. Sorbinil normalized 125I-albumin permeation in all three ocular tissues in 8-month galactose-fed rats. Polyol levels were increased significantly in all three ocular tissues of 3-week galactose-fed rats; sorbinil markedly decreased, but did not normalize, polyol levels in all three tissues.

• Research Organization: Washington Univ. School of Medicine, St. Louis, MO (USA)
• OSTI ID: 6975074
• Journal Information: Invest. Ophthalmol. Visual Sci.; (United States), Vol. 29:6
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
CAPILLARIES
PERMEABILITY
ENZYME INHIBITORS
BIOLOGICAL EFFECTS
EYES
BLOOD FLOW
IMIDAZOLES
BRAIN
DIET
GALACTOSE
INHIBITION
IODINE 125
MICROSPHERES
POLYMERS
RETINA
STRONTIUM 85
TRACER TECHNIQUES
UVEA
ALDEHYDES
ALKALINE EARTH ISOTOPES
AZOLES
BETA DECAY RADIOISOTOPES
BLOOD VESSELS
BODY
BODY AREAS
CARBOHYDRATES
CARDIOVASCULAR SYSTEM
CENTRAL NERVOUS SYSTEM
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
EVEN-ODD NUCLEI
FACE
HEAD
HETEROCYCLIC COMPOUNDS
HEXOSES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
MONOSACCHARIDES
NERVOUS SYSTEM
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANS
RADIOISOTOPES
SACCHARIDES
SENSE ORGANS
STRONTIUM ISOTOPES
550201* - Biochemistry- Tracer Techniques