Effects of Glycyrrhizin Treatment on Diabetic Cornea

Overview

Journal J Ocul Pharmacol Ther

Specialties Ophthalmology
Pharmacology

Date 2020 Dec 21

PMID 33347772

Citations 5

Authors

Mallika Somayajulu

Sharon A McClellan

Ahalya Pitchaikannu

Denise Bessert

Li Liu

Jena Steinle

Linda D Hazlett

Affiliations

Soon will be listed here.

Abstract

To test how glycyrrhizin (GLY) affects mouse corneal epithelial cells (MCEC) and the diabetic murine cornea. Viability of MCEC grown under normal or high glucose (HG) with/without GLY was tested by an MTT assay. In addition, C57BL/6 mice were injected with streptozotocin and a subset of control and diabetic mice received GLY in their drinking water. mRNA and protein levels of proinflammatory and oxidative stress molecules were tested by reverse transcription-polymerase chain reaction (RT-PCR) in both models. studies using human diabetic versus control corneas analyzed proinflammatory and oxidative stress markers using RT-PCR and enzyme-linked immunosorbent assay. GLY protected against loss of cell viability induced by HG and significantly reduced , , , , , , , , , and . , corneas of GLY-treated diabetic mice showed significantly decreased mRNA expression for , , and all molecules listed above; GLY also lowered HMGB1 and IL-1β proteins ( and ). studies using diabetic human corneas revealed elevated mRNA levels of inflammatory and oxidative stress molecules (as listed above for ) versus normal age-matched controls. Protein levels for HMGB1 and IL-1β also were elevated in diabetic human versus control corneas. The data provide evidence that GLY treatment attenuates inflammation and oxidative stress in MCEC and in the cornea of diabetic mice. data support the similarities of proinflammatory and oxidative stress data in mouse compared to human, suggesting that GLY treatment would have relevancy to patient care.

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