Back to Search
Start Over
TGF-beta2 inhibits growth of uveal melanocytes at physiological concentrations.
- Source :
-
Experimental eye research [Exp Eye Res] 1998 Aug; Vol. 67 (2), pp. 143-50. - Publication Year :
- 1998
-
Abstract
- The effect of TGF-beta2 on growth of uveal melanocytes in vitro was studied and the dose-dependent inhibitory effect of TGF-beta2 was compared with the known concentration of TGF-beta2 in aqueous humor. Uveal melanocytes were isolated and cultured with medium supplemented with cAMP elevating agents and basic fibroblast growth factor. The uveal melanocytes were plated into multi-well plates. After 24 hr, TGF-beta2 was added to the medium in various concentrations. After 5 days, the cells were detached, counted and compared to the controls. The effect of TGF-beta2 on DNA synthesis (as evaluated by uptake of bromodeoxyuridine) were also tested. TGF-beta2 inhibited growth and DNA synthesis of cultured uveal melanocytes in a dose-dependent manner at concentrations from 0.03-10.0 ng ml-1. The growth-inhibition of TGF-beta2 was present even in serum-free medium. TGF-beta2 had little or no effect on melanogenesis of cultured uveal melanocytes. The serum used for cultivation did not contain active TGF-beta1 or TGF-beta2 as measured by immunoassay. The known amount of active TGF-beta2 in aqueous humor (0.2-0.4 ng ml-1) is sufficient to inhibit the growth of uveal melanocytes. It indicates that TGF-beta2 is a potent growth inhibit factor of uveal melanocytes and may play an important role in maintaining the non-proliferative, relatively quiescence status of uveal melanocytes in vivo.<br /> (Copyright 1998 Academic Press)
- Subjects :
- Adult
Bromodeoxyuridine pharmacokinetics
Cell Culture Techniques
Cell Division drug effects
DNA biosynthesis
Dose-Response Relationship, Drug
Humans
Melanins biosynthesis
Melanocytes metabolism
Recombinant Proteins pharmacology
Uvea cytology
Uvea metabolism
Melanocytes drug effects
Transforming Growth Factor beta pharmacology
Uvea drug effects
Subjects
Details
- Language :
- English
- ISSN :
- 0014-4835
- Volume :
- 67
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Experimental eye research
- Publication Type :
- Academic Journal
- Accession number :
- 9733581
- Full Text :
- https://doi.org/10.1006/exer.1998.0501