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Intravitreal levels of vascular endothelial growth factor and interleukin-6 are correlated with macular edema in branch retinal vein occlusion

  • Clinical Investigation
  • Published:
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Abstract

Background

To investigate whether vascular endothelial growth factor (VEGF) or interleukin-6 (IL-6) contributes to the pathogenesis of macular edema in eyes with branch retinal vein occlusion (BRVO), the correlations between these factors were investigated.

Methods

We studied 25 patients suffering from macular edema with BRVO and 14 patients with nonischemic ocular disease (control group). The degree of retinal ischemia was evaluated in terms of the area of capillary nonperfusion using Scion Images, and the severity of macular edema was examined using optical coherence tomography. Vitreous fluid samples were obtained at the time of vitreoretinal surgery, and VEGF and IL-6 levels in the vitreous fluid and plasma were determined by means of enzyme-linked immunosorbent assays.

Results

Vitreous fluid levels of VEGF and IL-6 were significantly elevated in patients with BRVO compared with control patients (P=0.0011 and P<0.0001, respectively). Also, the vitreous level of VEGF was significantly correlated with that of IL-6 (P=0.0012), and vitreous levels of VEGF and IL-6 were correlated with the size of the BRVO nonperfusion area (P<0.0001 and P=0.0033, respectively). Furthermore, vitreous levels of VEGF and IL-6 were correlated with the severity of macular edema (P=0.0008 and P=0.0191, respectively) and the severity of macular edema of BRVO was significantly correlated with the size of the BRVO nonperfusion area (P=0.0044).

Conclusions

The levels of VEGF and IL-6 are increased in patients with macular edema with BRVO and are significantly correlated with the size of the nonperfusion area and the severity of macular edema. Therefore, they may play a role in macular edema with BRVO.

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Acknowledgements

The authors thank Drs. Makiko Yamasaki, Koji Jian, Masaki Imada, Tomoko Yokoyama and Eiichirou Sugimoto for their assistance in collecting the vitreous and plasma samples and in performing the ophthalmological examinations. We also thank Katsunori Shimada of the Department of Biostatistics, STATZ Corporation, Tokyo, for assistance with the statistical analysis.

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Authors and Affiliations

  1. Department of Ophthalmology and Visual Science, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3, Kasumi-cho, Minami-ku, Hiroshima, 734-8551, Japan

    Hidetaka Noma, Atsushi Minamoto & Hiromu K. Mishima

  2. Department of Ophthalmology, Diabetes Center, Tokyo Women’s Medical University, 8-1, Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan

    Hideharu Funatsu

  3. Department of Ophthalmology, Hiroshima Prefectural Hospital, 1-5-54, Ujinakanda, Minami-ku, Hiroshima, 734-0004, Japan

    Hidetoshi Tsukamoto

  4. Department of Ophthalmology, Chuden Hospital, 3-4-27, Ote-cho, Naka-ku, Hiroshima, 730-8562, Japan

    Kensuke Nakano

  5. Department of Ophthalmology and Visual Science, Yamagata University School of Medicine, 2-2-2, Iidanishi, Yamagata, 990-9585, Japan

    Hidetoshi Yamashita

Authors
  1. Hidetaka Noma
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  2. Atsushi Minamoto
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  3. Hideharu Funatsu
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  4. Hidetoshi Tsukamoto
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  5. Kensuke Nakano
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  6. Hidetoshi Yamashita
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  7. Hiromu K. Mishima
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Correspondence to Hiromu K. Mishima.

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Noma, H., Minamoto, A., Funatsu, H. et al. Intravitreal levels of vascular endothelial growth factor and interleukin-6 are correlated with macular edema in branch retinal vein occlusion. Graefe's Arch Clin Exp Ophthalmo 244, 309–315 (2006). https://doi.org/10.1007/s00417-004-1087-4

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  • DOI: https://doi.org/10.1007/s00417-004-1087-4

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