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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Endogenous tissue type plasminogen activator facilitates NMDA-induced retinal damage.

To investigate the role of tissue plasminogen activator (tPA) in retinal damage, tPA-deficient and wild-type mice were employed. Two different retinal neuron insult models were used in the present study. One is an excitotoxin-treated retinal model, created by direct intravitreal injection of glutamate analogs, NMDA or kainic acid (KA), and the other is an ischemia-reperfusion model induced by transient elevation of intraocular pressure. TdT-dUTP terminal nick-end labeling (TUNEL) method was used to examine the retinal cell nuclear damage. The number of TUNEL-positive cells in ganglion cell layer (GCL) and inner nuclear layer (INL) in tPA-deficient mice after low-, but not high-dose NMDA was significantly less compared to wild type. In contrast, neither intravitreal KA or transient ischemia produced significant difference in retinal damage in tPA vs. wild-type mice. These data show that tPA-deficient mice are resistant to retinal damage by intravitreal injection of NMDA, and indicate that tPA plays a role in the retinal cell damage induced by excitotoxins, especially NMDA.[1]

References

  1. Endogenous tissue type plasminogen activator facilitates NMDA-induced retinal damage. Kumada, M., Niwa, M., Wang, X., Matsuno, H., Hara, A., Mori, H., Matsuo, O., Yamamoto, T., Kozawa, O. Toxicol. Appl. Pharmacol. (2004) [Pubmed]
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