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Effects of intraocular irrigation with melphalan on rabbit retinas during vitrectomy

  • Retinal Disorders
  • Published:
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Abstract

Purpose

To investigate the toxic effects of perfusion of intravitreal melphalan during vitrectomy on the rabbit retina.

Methods

We performed electoretinography (ERG) in 18 eyes of 18 healthy albino rabbits before and after intraocular melphalan perfusion at concentrations of 5-, 10-, and 20-μg/ml during pars plana vitrectomy. Fellow eyes that underwent vitrectomy without melphalan served as controls. The histopathologic retinal changes were observed in both eyes of two rabbits from each group.

Results

In the 5-μg/ml perfusion group, the ERGs and histology showed no substantial changes compared with control fellow eyes during 28 days postoperatively. In the 10- and 20-μg/ml groups, the mean a-wave amplitude decreased to 52% and 31% respectively of the fellow eye; the mean b-wave amplitude decreased to 52% and 19% respectively. However, the peak implicit time of the a- and b-waves did not significantly differ in the 10- and 20-μg/ml groups during 28 days postoperatively. Histologic sections showed necrosis of the inner nuclear layer and thinning of the outer nuclear layer in the 10-μg/ml group. Loss of the outer nuclear layer and the photoreceptor layer and necrosis of the inner nuclear layer were observed in the 20-μg/ml group.

Conclusion

The intravitreal 5-μg/ml melphalan perfusion during vitrectomy appears to be nontoxic to the retina. This therapeutic modality might be a potential treatment for retinoblastoma with vitreous seeding.

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Authors and Affiliations

  1. Department of Ophthalmology, Gunma University School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma, 371-8511, Japan

    Yukitoshi Shimoda, Rika Hamano, Katuhiko Ishihara, Noriko Shimoda, Norikazu Hagimura, Hideo Akiyama & Shoji Kishi

  2. Second Department of Ophthalmology, Toho University Medical Center, Ohasi Hospital, Tokyo, Japan

    Akihiro Kaneko

  3. 1-51-6-206 Hounan, Suginami word, Tokyo, Japan

    Akihiro Kaneko

Authors
  1. Yukitoshi Shimoda
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  2. Rika Hamano
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  3. Katuhiko Ishihara
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  4. Noriko Shimoda
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  5. Norikazu Hagimura
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  6. Hideo Akiyama
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  7. Shoji Kishi
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  8. Akihiro Kaneko
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Corresponding author

Correspondence to Yukitoshi Shimoda.

Additional information

Grant Support: Supported in part by a grant from the Health and Welfare Ministry, Japan.

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Shimoda, Y., Hamano, R., Ishihara, K. et al. Effects of intraocular irrigation with melphalan on rabbit retinas during vitrectomy. Graefes Arch Clin Exp Ophthalmol 246, 501–508 (2008). https://doi.org/10.1007/s00417-007-0685-3

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  • DOI: https://doi.org/10.1007/s00417-007-0685-3

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