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International Journal of Molecular Medicine
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Article

Effects of a Rho kinase inhibitor on the sequential expression of ICAM-1, HIF-1α, Bcl-2 and caspase-3 in the retina of rats with oxygen-induced retinopathy

  • Authors:
    • Haiying Wang
    • Xiaolong Chen
  • View Affiliations / Copyright

    Affiliations: Department of Ophthalmology, The Fourth People's Hospital of Shenyang, Shenyang, Liaoning 110031, P.R. China, Department of Ophthalmology, Shengjing Hospital Affiliated to China Medical University, Shenyang, Liaoning 110004, P.R. China
  • Pages: 457-463
    |
    Published online on: June 5, 2013
       https://doi.org/10.3892/ijmm.2013.1410
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Abstract

The aim of the present study was to evaluate the effects of blocking the Rho kinase pathway on non-perfused regions and angiogenesis in the retina of rats using a rat model of oxygen-induced retinopathy (OIR) by observing the sequential expression of intercellular adhesion molecule-1 (ICAM-1), hypoxia-inducible factor-1 (HIF-1), B-cell lymphoma/leukemia-2 gene (Bcl-2) and caspase-3 mRNA following the administration of the Rho kinase inhibitor, fasudil (FSD). A total of 240 newborn rats were randomly divided into a normoxia control (N) group, a hyperoxia (H) group and a H + FSD (HF) group. The rats were sacrificed, and the eyes were enucleated from postnatal day (P)12 to P21. Samples were prepared for retinal flat mounts, mRNA and protein quantification. On P14, a higher number of circuitous retinal veins was observed in the H group compared with the HF group. In the HF group, the avascular area was significantly reduced compared with the H group on P18 (P<0.01). In the HF group, the mRNA expression of Bcl-2 was significantly increased on P15 compared with the N and H group (P<0.01). On P15 and P17 in the H group and on P13 in the HF group, the mRNA expression of ICAM‑1 was significantly increased compared with the other groups (P<0.05). In the H and HF group, the expression of HIF-1α was significantly increased on P12 compared with the N group (P<0.05). On P19 and P21, HIF-1α expression was significantly increased to a maximum level in the HF group compared with the H and N group (P<0.01). In conclusion, these results suggest that FSD inhibits the expression of ICAM-1, assisting in the release of Bcl-2, suppressing caspase-3. In the HF group, the retinal flat mounts revealed that FSD had a vasorelaxant effect. On P18, a double-layered retinal vascular network was formed, and the number of non-perfused regions was significantly reduced. However, the late-phase peak expression of HIF-1α resulted in an inevitable increase in vascular endothelial growth factor expression and further accelerated neovascularization and vascular reconstruction in the immature retinal model.
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Copy and paste a formatted citation
Spandidos Publications style
Wang H and Chen X: Effects of a Rho kinase inhibitor on the sequential expression of ICAM-1, HIF-1α, Bcl-2 and caspase-3 in the retina of rats with oxygen-induced retinopathy. Int J Mol Med 32: 457-463, 2013.
APA
Wang, H., & Chen, X. (2013). Effects of a Rho kinase inhibitor on the sequential expression of ICAM-1, HIF-1α, Bcl-2 and caspase-3 in the retina of rats with oxygen-induced retinopathy. International Journal of Molecular Medicine, 32, 457-463. https://doi.org/10.3892/ijmm.2013.1410
MLA
Wang, H., Chen, X."Effects of a Rho kinase inhibitor on the sequential expression of ICAM-1, HIF-1α, Bcl-2 and caspase-3 in the retina of rats with oxygen-induced retinopathy". International Journal of Molecular Medicine 32.2 (2013): 457-463.
Chicago
Wang, H., Chen, X."Effects of a Rho kinase inhibitor on the sequential expression of ICAM-1, HIF-1α, Bcl-2 and caspase-3 in the retina of rats with oxygen-induced retinopathy". International Journal of Molecular Medicine 32, no. 2 (2013): 457-463. https://doi.org/10.3892/ijmm.2013.1410
Copy and paste a formatted citation
x
Spandidos Publications style
Wang H and Chen X: Effects of a Rho kinase inhibitor on the sequential expression of ICAM-1, HIF-1α, Bcl-2 and caspase-3 in the retina of rats with oxygen-induced retinopathy. Int J Mol Med 32: 457-463, 2013.
APA
Wang, H., & Chen, X. (2013). Effects of a Rho kinase inhibitor on the sequential expression of ICAM-1, HIF-1α, Bcl-2 and caspase-3 in the retina of rats with oxygen-induced retinopathy. International Journal of Molecular Medicine, 32, 457-463. https://doi.org/10.3892/ijmm.2013.1410
MLA
Wang, H., Chen, X."Effects of a Rho kinase inhibitor on the sequential expression of ICAM-1, HIF-1α, Bcl-2 and caspase-3 in the retina of rats with oxygen-induced retinopathy". International Journal of Molecular Medicine 32.2 (2013): 457-463.
Chicago
Wang, H., Chen, X."Effects of a Rho kinase inhibitor on the sequential expression of ICAM-1, HIF-1α, Bcl-2 and caspase-3 in the retina of rats with oxygen-induced retinopathy". International Journal of Molecular Medicine 32, no. 2 (2013): 457-463. https://doi.org/10.3892/ijmm.2013.1410
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