title: Rho-associated protein kinase inhibitor, Y-27632, induces alterations in adhesion, contraction and motility in cultured human trabecular meshwork cells.
abstract: We investigated the roles of Rho-associated protein kinase (ROCK) in regulating activities such as adhesion, contraction and migration in cultured human trabecular meshwork (TM) cells. Human TM cells in culture were treated with Y-27632, a specific ROCK inhibitor. Trypan blue exclusion test and TUNEL staining showed little or no direct toxicity of Y-27632 on TM cells. By MTT assay, Y-27632 did not significantly affect the proliferation of TM cells. The cell adhesion assay showed that Y-27632 promoted the cell adhesiveness to both fibronectin and collagen type I in a dose-dependent manner. Collagen gel contraction activity of TM cells was significantly inhibited by the treatment of Y-27632 in a dose-dependent manner. The addition of Y-27632 accelerated motility of TM cells in wound healing assay. Phosphorylated LIM kinase 2 and cofilin, related to actin bundling and integrin clustering, were dephosphorylated (activated) by Y-27632. In conclusion, Y-27632 elicits profound effects on TM cell activities including adhesion, gel contraction, and cell motility. These Y-27632-induced changes of TM cells may be relevance to the physiology of the aqueous outflow system.
authors.affiliation: Department of Ophthalmology & Visual Science, Kumamoto University Graduate School of Medical Sciences, Honjo 1-1-1, Kumamoto 860-8556, Japan.
authors.forename: Tomoyo
authors.initials: T
authors.lastname: Koga
authors.forename: Takahisa
authors.initials: T
authors.lastname: Koga
authors.forename: Maiko
authors.initials: M
authors.lastname: Awai
authors.forename: Jun-ichiro
authors.initials: J
authors.lastname: Tsutsui
authors.forename: Beatrice Y J T
authors.initials: BY
authors.lastname: Yue
authors.forename: Hidenobu
authors.initials: H
authors.lastname: Tanihara
mesh_terms: D000577:Amides / Q000494:pharmacology* / Q000633:toxicity; D002448:Cell Adhesion / Q000187:drug effects; D002465:Cell Movement / Q000187:drug effects; D048429:Cell Size / Q000187:drug effects; D002478:Cells, Cultured; D005109:Extracellular Matrix; D006801:Humans; D015151:Immunoblotting / Q000379:methods; D007150:Immunohistochemistry / Q000379:methods; D047908:Intracellular Signaling Peptides and Proteins; D017346:Protein Serine-Threonine Kinases / Q000037:antagonists & inhibitors* / Q000502:physiology*; D011725:Pyridines / Q000494:pharmacology* / Q000633:toxicity; D014129:Trabecular Meshwork / Q000166:cytology* / Q000187:drug effects; D054460:rho-Associated Kinases
chemical_list: D000577:Amides; D047908:Intracellular Signaling Peptides and Proteins; D011725:Pyridines; C108830:Y 27632; D017346:Protein Serine-Threonine Kinases; D054460:rho-Associated Kinases