Noladin ether acts on trabecular meshwork cannabinoid (CB1) receptors to enhance aqueous humor outflow facility

Investigative Ophthalmology & Visual Science
Ya Fatou NjieZhao-Hui Song

Abstract

To study the effects of 2-arachidonyl glyceryl ether (noladin ether), an endocannabinoid ligand selective for cannabinoid (CB)1 receptor, on aqueous humor outflow facility, to investigate the involvement of trabecular meshwork CB1 receptors and the p42/44 MAP kinase signaling pathway and to explore the cellular mechanisms of noladin ether-induced changes of outflow facility. The effects of noladin ether on aqueous humor outflow facility were measured in a porcine anterior-segment-perfused organ culture model. The expression of CB1 receptors on cultured porcine trabecular meshwork cells and the coupling of these receptors to p42/44 MAP kinase was determined by immunofluorescence microscopy and Western blot analysis. Both Western blot and zymography were used to monitor the effects of noladin ether on matrix metalloproteinase (MMP)-2. In morphologic studies, AlexaFluor 488-labeled phalloidin staining was used to examine actin filament, and immunohistochemistry with anti-paxillin antibodies was used to detect focal adhesions. Within 1 hour after adding 3, 30, or 300 nM of noladin ether, the aqueous humor outflow facility increased concentration dependently. The effect of 30 nM of noladin ether was completely blocked by SR141716A, ...Continue Reading

Citations

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Feb 18, 2016·Neural Plasticity·Elizabeth A CairnsMelanie E M Kelly
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