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Corneal nerve alterations in diabetes mellitus
Archives of Ophthalmology (Chicago, Ill. : 1960)
|September 1, 1984
Summary
Diabetic corneas show early nerve damage, including irregular nerve beading and basal lamina changes in Schwann cells. This study reveals the first neural alterations in diabetic corneas and avascular tissues.
Area of Science:
- Ophthalmology
- Diabetology
- Neuroscience
Background:
- Diabetic complications affect various tissues, including neural structures.
- Corneal innervation is crucial for ocular health and function.
- Early detection of neural changes in diabetes is vital for preventing further complications.
Purpose of the Study:
- To investigate the morphologic changes in corneal innervation in a rat model of streptozocin-induced diabetes.
- To identify early pathological manifestations in the nerves of diabetic corneas.
Main Methods:
- Streptozotocin-induced diabetes model in rats.
- Corneal tissue analysis at 1, 4, 16, and 36 weeks post-induction.
- Light and electron microscopy techniques, including nonspecific cholinesterase reaction and gold chloride impregnation.
Main Results:
- Observed increased irregularity in nerve fiber beading periodicity in diabetic corneas.
- Identified ultrastructural irregularities in the basal lamina of Schwann cells.
- Detected occasional axonal degeneration in corneas of diabetic rats at later time points.
Conclusions:
- The study demonstrates early pathological changes in corneal innervation in diabetic rats.
- These findings represent the first evidence of neural alterations in diabetic corneas and avascular tissues.
- These neural changes are early manifestations of diabetic neuropathy in the cornea.