TGF-beta 2 increases alpha-smooth muscle actin expression in bovine retinal pigment epithelial cells.

Abstract:

PURPOSE:To examine whether transforming growth factor-beta 2 (TGF-beta 2) induces the expression of alpha-smooth muscle actin (SMA), a biochemical marker of myofibroblasts, in cultured bovine retinal pigment epithelial (RPE) cells. METHODS:Bovine RPE cells were cultured in F-12 nutrient mixture supplemented with 5% fetal bovine serum (FBS), with or without TGF-beta 2 (0.01-10 ng/ml) for 6 days. During this culture period, cells did not reach a confluence. Alpha-SMA was detected immunocytochemically with a mouse monoclonal antibody, and the ratio of the number of alpha-SMA positive cells to the total number of cells was calculated. RESULTS:About 10% of the cells in control cultures with only FBS were positive for alpha-SMA. TGF-beta 2 increased the ratio of positive cells dose-dependently (p < 0.0001), while a neutralizing antibody against TGF-beta 2 blocked this effect. CONCLUSIONS:TGF-beta 2 induced expression of alpha-SMA in bovine RPE cells.

journal_name

Curr Eye Res

journal_title

Current eye research

authors

Kurosaka D,Muraki Y,Inoue M,Katsura H

doi

10.3109/02713689608995147

subject

Has Abstract

pub_date

1996-11-01 00:00:00

pages

1144-7

issue

11

eissn

0271-3683

issn

1460-2202

journal_volume

15

pub_type

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