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Bacterial keratitis: Photodynamic inactivation reduced experimental inflammation.
Experimental and Therapeutic Medicine 2017 November
The successful treatment of bacterial keratitis remains an unsolved clinical problem. The current study aimed to establish a murine keratitis model and to investigate the effect of chlorin e6 (Ce6) and photodynamic inactivation (PDI) on corneal inflammation. The cornea of anesthetized mice was scratched and covered with a bacterial suspension of Pseudomonas aeruginosa . A paste containing Ce6 was applied to the cornea with subsequent exposure to specified light. Two days later the animals were sacrificed, and the globes were processed for light microscopy. Evaluation parameters were the maximal corneal thickness and the severity of the hypopyon. The maximal corneal thickness of 290±16 µm in the infected and untreated group was significantly reduced to 220±8 µm in the infected and treated group (P<0.05). In addition, the hypopyon was less severe in the infected and treated group. In conclusion, the present study indicates that PDI using Ce6 may be a potential approach to treat patients suffering with severe bacterial keratitis.
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