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Research ArticleCELLULAR AND MOLECULAR

R(+)-Methanandamide and Other Cannabinoids Induce the Expression of Cyclooxygenase-2 and Matrix Metalloproteinases in Human Nonpigmented Ciliary Epithelial Cells

Susanne Rösch, Robert Ramer, Kay Brune and Burkhard Hinz
Journal of Pharmacology and Experimental Therapeutics March 2006, 316 (3) 1219-1228; DOI: https://doi.org/10.1124/jpet.105.092858
Susanne Rösch
Department of Experimental and Clinical Pharmacology and Toxicology, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany
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Robert Ramer
Department of Experimental and Clinical Pharmacology and Toxicology, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany
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Kay Brune
Department of Experimental and Clinical Pharmacology and Toxicology, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany
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Burkhard Hinz
Department of Experimental and Clinical Pharmacology and Toxicology, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany
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Abstract

Prostaglandins (PGs) and matrix metalloproteinases (MMP) have been implicated in lowering intraocular pressure (IOP) by facilitating aqueous humor outflow. A possible role of cyclooxygenase-2 (COX-2) in this process was emphasized by findings showing an impaired COX-2 expression in the nonpigmented ciliary epithelium (NPE) of patients with primary open-angle glaucoma. Using human NPE cells, the present study therefore investigated the effect of the IOP-lowering cannabinoid R(+)-methanandamide [R(+)-MA] on the expression of COX-2 and different MMPs and tissue inhibitors of MMPs (TIMPs). R(+)-MA led to a concentration- and time-dependent increase of COX-2 mRNA expression. R(+)-MA-induced COX-2 expression was accompanied by time-dependent phosphorylations of p38 mitogen-activated protein kinase (MAPK) and p42/44 MAPK and was abrogated by inhibitors of both pathways. Moreover, R(+)-MA increased the mRNA and protein expression of MMP-1, MMP-3, MMP-9, and TIMP-1 but not that of MMP-2 and TIMP-2. Inhibition of COX-2 activity with NS-398 [N-[2-(cyclohexyloxy)-4-nitrophenyl]-methanesulfonamide] was associated with a virtually complete suppression of R(+)-MA-induced MMP-9 and TIMP-1 expression. Consistent with these data, MMP-9 and TIMP-1 expression was also induced by PGE2, a major COX-2 product. Two other COX-2-inducing cannabinoids, anandamide and Δ9-tetrahydrocannabinol, caused the same pattern of MMP and TIMP expression as R(+)-MA both in the absence and presence of NS-398. Altogether, cannabinoids induce the production of several outflow-facilitating mediators in the human NPE. Our results further imply an involvement of COX-2-dependent PGs in MMP-9 and TIMP-1 expression. In conclusion, stimulation of intraocular COX-2 and MMP expression may represent a potential mechanism contributing to the IOP-lowering action of different cannabinoids.

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Journal of Pharmacology and Experimental Therapeutics: 316 (3)
Journal of Pharmacology and Experimental Therapeutics
Vol. 316, Issue 3
1 Mar 2006
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Research ArticleCELLULAR AND MOLECULAR

R(+)-Methanandamide and Other Cannabinoids Induce the Expression of Cyclooxygenase-2 and Matrix Metalloproteinases in Human Nonpigmented Ciliary Epithelial Cells

Susanne Rösch, Robert Ramer, Kay Brune and Burkhard Hinz
Journal of Pharmacology and Experimental Therapeutics March 1, 2006, 316 (3) 1219-1228; DOI: https://doi.org/10.1124/jpet.105.092858

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Research ArticleCELLULAR AND MOLECULAR

R(+)-Methanandamide and Other Cannabinoids Induce the Expression of Cyclooxygenase-2 and Matrix Metalloproteinases in Human Nonpigmented Ciliary Epithelial Cells

Susanne Rösch, Robert Ramer, Kay Brune and Burkhard Hinz
Journal of Pharmacology and Experimental Therapeutics March 1, 2006, 316 (3) 1219-1228; DOI: https://doi.org/10.1124/jpet.105.092858
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