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Transforming growth factor-beta induces expression of vascular endothelial growth factor in human retinal pigment epithelial cells: involvement of mitogen-activated protein kinases.
J Cell Physiol. 2003 Dec; 197(3):453-62.JC

Abstract

Vascular endothelial growth factor (VEGF) is a major agent in choroidal and retinal neovascularization, events associated with age-related macular degeneration (AMD) and diabetic retinopathy. Retinal pigment epithelium (RPE), strategically located between retina and choroid, plays a critical role in retinal disorders. We have examined the effects of various growth factors on the expression and secretion of VEGF by human retinal pigment epithelial cell cultures (HRPE). RT-PCR analyses revealed the presence of three isoforms of mRNA corresponding to VEGF 121, 165, and 189 that were up regulated by TGF-beta1. TGF-beta1, beta2, and beta3 were the potent inducers of VEGF secretion by HRPE cells whereas bFGF, PDGF, TGF-alpha, and GM-CSF had no effects. TGF-beta receptor type II antibody significantly reversed induction of VEGF secretion by TGF-beta. In contrast activin, inhibin and BMP, members of TGF-beta super family, had no effects on VEGF expression in HRPE. VEGF mRNA levels and protein secretion induced by TGF-beta were significantly inhibited by SB203580 and U0126, inhibitors of MAP kinases, but not by staurosporine and PDTC, protein kinase C and NF-kappaB pathway inhibitors, respectively. TGF-beta also induced VEGF expression by fibroblasts derived from human choroid of eye. TGF-beta induction of VEGF secretion by RPE and choroid cells may play a significant role in choroidal neovascularization (CNV) in AMD. Since the secretion of VEGF by HRPE is regulated by MAP kinase pathways, MAP kinase inhibitors may have potential use as therapeutic agents for CNV in AMD.

Authors+Show Affiliations

National Eye Institute, National Institutes of Health, Bethesda, Maryland 20892, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

14566975

Citation

Nagineni, Chandrasekharam N., et al. "Transforming Growth Factor-beta Induces Expression of Vascular Endothelial Growth Factor in Human Retinal Pigment Epithelial Cells: Involvement of Mitogen-activated Protein Kinases." Journal of Cellular Physiology, vol. 197, no. 3, 2003, pp. 453-62.
Nagineni CN, Samuel W, Nagineni S, et al. Transforming growth factor-beta induces expression of vascular endothelial growth factor in human retinal pigment epithelial cells: involvement of mitogen-activated protein kinases. J Cell Physiol. 2003;197(3):453-62.
Nagineni, C. N., Samuel, W., Nagineni, S., Pardhasaradhi, K., Wiggert, B., Detrick, B., & Hooks, J. J. (2003). Transforming growth factor-beta induces expression of vascular endothelial growth factor in human retinal pigment epithelial cells: involvement of mitogen-activated protein kinases. Journal of Cellular Physiology, 197(3), 453-62.
Nagineni CN, et al. Transforming Growth Factor-beta Induces Expression of Vascular Endothelial Growth Factor in Human Retinal Pigment Epithelial Cells: Involvement of Mitogen-activated Protein Kinases. J Cell Physiol. 2003;197(3):453-62. PubMed PMID: 14566975.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Transforming growth factor-beta induces expression of vascular endothelial growth factor in human retinal pigment epithelial cells: involvement of mitogen-activated protein kinases. AU - Nagineni,Chandrasekharam N, AU - Samuel,William, AU - Nagineni,Sahrudaya, AU - Pardhasaradhi,Komanduri, AU - Wiggert,Barbara, AU - Detrick,Barbara, AU - Hooks,John J, PY - 2003/10/21/pubmed PY - 2003/12/6/medline PY - 2003/10/21/entrez SP - 453 EP - 62 JF - Journal of cellular physiology JO - J. Cell. Physiol. VL - 197 IS - 3 N2 - Vascular endothelial growth factor (VEGF) is a major agent in choroidal and retinal neovascularization, events associated with age-related macular degeneration (AMD) and diabetic retinopathy. Retinal pigment epithelium (RPE), strategically located between retina and choroid, plays a critical role in retinal disorders. We have examined the effects of various growth factors on the expression and secretion of VEGF by human retinal pigment epithelial cell cultures (HRPE). RT-PCR analyses revealed the presence of three isoforms of mRNA corresponding to VEGF 121, 165, and 189 that were up regulated by TGF-beta1. TGF-beta1, beta2, and beta3 were the potent inducers of VEGF secretion by HRPE cells whereas bFGF, PDGF, TGF-alpha, and GM-CSF had no effects. TGF-beta receptor type II antibody significantly reversed induction of VEGF secretion by TGF-beta. In contrast activin, inhibin and BMP, members of TGF-beta super family, had no effects on VEGF expression in HRPE. VEGF mRNA levels and protein secretion induced by TGF-beta were significantly inhibited by SB203580 and U0126, inhibitors of MAP kinases, but not by staurosporine and PDTC, protein kinase C and NF-kappaB pathway inhibitors, respectively. TGF-beta also induced VEGF expression by fibroblasts derived from human choroid of eye. TGF-beta induction of VEGF secretion by RPE and choroid cells may play a significant role in choroidal neovascularization (CNV) in AMD. Since the secretion of VEGF by HRPE is regulated by MAP kinase pathways, MAP kinase inhibitors may have potential use as therapeutic agents for CNV in AMD. SN - 0021-9541 UR - https://www.unboundmedicine.com/medline/citation/14566975/Transforming_growth_factor_beta_induces_expression_of_vascular_endothelial_growth_factor_in_human_retinal_pigment_epithelial_cells:_involvement_of_mitogen_activated_protein_kinases_ L2 - https://doi.org/10.1002/jcp.10378 DB - PRIME DP - Unbound Medicine ER -