Use of topical insulin to normalize corneal epithelial healing in diabetes mellitus

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Objective: To determine whether topical application of insulin normalizes delayed corneal wound healing in rats with diabetes mellitus (DB). Methods: Diabetes mellitus was induced with streptozocin. A 5-mm corneal abrasion at 9 or 11 weeks was treated topically for 7 days (4 times daily) with 1, 2, or 5 U of insulin or with sterile vehicle (SV). Results: Residual corneal epithelial defects of rats with DB receiving SV (hereafter called DB SV rats or animals) were approximately 35% larger than in healthy animals receiving SV (hereafter called healthy SV rats or animals). Rats with DB receiving topical insulin had wounds ranging from 19% to 60% smaller than DB SV rats, corresponding to wound sizes in healthy SV rats. Topical insulin had no effect on reepithelialization of corneal wounds in healthy SV rats. Insulin did not affect corneal thickness, ocular pressure, or serum glucose level. The corneal sensitivity of DB SV rats was markedly reduced from healthy SV rats, but rats with DB given insulin had corneal sensitivity values comparable to the healthy SV group. DNA synthesis was decreased in DB SV corneal epithelium but was comparable to that in healthy SV rats after they received insulin; apoptosis and necrosis levels were similar in all groups. Conclusion: Topical insulin normalizes corneal reepithelialization in diabetic rats. Clinical Relevance: Direct application of insulin may serve as an important strategy for treating diabetic keratopathy.

Original languageEnglish (US)
Pages (from-to)1082-1088
Number of pages7
JournalArchives of Ophthalmology
Volume125
Issue number8
DOIs
StatePublished - Aug 1 2007

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Diabetes Mellitus
Insulin
Wounds and Injuries
Corneal Epithelium
Streptozocin
Wound Healing
Necrosis
Apoptosis
Pressure
Glucose
DNA

All Science Journal Classification (ASJC) codes

  • Ophthalmology

Cite this

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abstract = "Objective: To determine whether topical application of insulin normalizes delayed corneal wound healing in rats with diabetes mellitus (DB). Methods: Diabetes mellitus was induced with streptozocin. A 5-mm corneal abrasion at 9 or 11 weeks was treated topically for 7 days (4 times daily) with 1, 2, or 5 U of insulin or with sterile vehicle (SV). Results: Residual corneal epithelial defects of rats with DB receiving SV (hereafter called DB SV rats or animals) were approximately 35{\%} larger than in healthy animals receiving SV (hereafter called healthy SV rats or animals). Rats with DB receiving topical insulin had wounds ranging from 19{\%} to 60{\%} smaller than DB SV rats, corresponding to wound sizes in healthy SV rats. Topical insulin had no effect on reepithelialization of corneal wounds in healthy SV rats. Insulin did not affect corneal thickness, ocular pressure, or serum glucose level. The corneal sensitivity of DB SV rats was markedly reduced from healthy SV rats, but rats with DB given insulin had corneal sensitivity values comparable to the healthy SV group. DNA synthesis was decreased in DB SV corneal epithelium but was comparable to that in healthy SV rats after they received insulin; apoptosis and necrosis levels were similar in all groups. Conclusion: Topical insulin normalizes corneal reepithelialization in diabetic rats. Clinical Relevance: Direct application of insulin may serve as an important strategy for treating diabetic keratopathy.",
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Use of topical insulin to normalize corneal epithelial healing in diabetes mellitus. / Zagon, Ian S.; Klocek, Matthew S.; Sassani, Joseph W.; McLaughlin, Patricia J.

In: Archives of Ophthalmology, Vol. 125, No. 8, 01.08.2007, p. 1082-1088.

Research output: Contribution to journalArticle

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