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Antiinflammatory effect of low-level laser therapy on Staphylococcus epidermidis endophthalmitis in rabbits

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Abstract

A rabbit model of endophthalmitis was established to evaluate the antiinflammatory effect of low-level laser therapy (LLLT) as an adjunct to treatment for Staphylococcus epidermidis endophthalmitis. Rabbits were randomly divided into three groups to receive intravitreal injections into their left eye: group A received 0.5 mg vancomycin (100 μl), group B received 0.5 mg vancomycin + 0.2 mg dexamethasone (100 μl), and group C received 0.5 mg vancomycin (100 μl) and continuous wave semiconductor laser irradiation (10 mW, λ = 632 nm) focused on the pupil. Slit lamp examination and B-mode ultrasonography were conducted to evaluate the symptoms of endophthalmitis. Polymorphonuclear cells and tumour necrosis factor alpha (TNF-α) in aqueous fluid were measured at 0 h, and 1, 2, 3, 7 and 15 days. A histology test was conducted at 15 days. B-mode ultrasonography and histology revealed that groups B and C had less inflammation than group A at 15 days. Groups B and C had fewer polymorphonuclear cells and lower levels of TNF-α in aqueous fluid than group A at 2, 3 and 7 days (P < 0.05). There was no significant difference between groups B and C (P > 0.05). There was no significant difference between groups A, B and C at 15 days (P > 0.05). As an adjunct to vancomycin therapy to treat S. epidermidis endophthalmitis, LLLT has an antiinflammatory effect similar to that of dexamethasone.

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Acknowledgments

This work was supported by Tianjin Science and Technology Supporting Item of China (grant numbers NO.10ZCSF00400 and NO.06YFSZSF00500).

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Authors and Affiliations

  1. Tianjin Medical University Eye Centre, Tianjin, 300070, China

    Wen-jiang Ma & Xiao-rong Li

  2. Laser Medicine Laboratory, Biomedical Engineering Institute, Chinese Academy of Medical Science, Tianjin, 300070, People’s Republic of China

    Ying-xin Li, Zhi-xiao Xue, Hui-juan Yin & Hui Ma

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  1. Wen-jiang Ma
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  2. Xiao-rong Li
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Correspondence to Ying-xin Li.

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Ma, Wj., Li, Xr., Li, Yx. et al. Antiinflammatory effect of low-level laser therapy on Staphylococcus epidermidis endophthalmitis in rabbits. Lasers Med Sci 27, 585–591 (2012). https://doi.org/10.1007/s10103-011-0991-1

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  • DOI: https://doi.org/10.1007/s10103-011-0991-1

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