Altered expression of growth factors and cytokines in keratoconus, bullous keratopathy and diabetic human corneas.

Altered expression of growth factors and cytokines in keratoconus, bullous keratopathy and diabetic human corneas. Research Abstract Details 

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Altered expression of growth factors and cytokines in keratoconus, bullous keratopathy and diabetic human corneas. Abstract Text:

M Saghizadeh,M Chwa,A Aoki,B Lin,A Pirouzmanesh,D J Brown,A V Ljubimov,M C Kenney,

The purpose of this study was to identify the growth factors and cytokines present in normal and diseased corneas. Total RNA was isolated from normal and diseased corneas. cDNA was synthesized from individual corneas and semiquantitative reverse transcription-polymerase chain reaction (RT-PCR) was performed with primers to IL-1alpha, 1IL-8, PDGF-B, BMP-2, BMP-4, IGF-I, TGF-beta2, FGF-2, and VEGF. After normalization to beta2-microglobulin, several factors were identified that were significantly different from normal. Antibodies to IGF-I, BMP-2, VEGF and TGF-beta2 were used for immunohistochemistry. A total of 93 corneas were used for this study including 31 normal, 20 keratoconus, 19 bullous keratopathy (pseudophakic and aphakic, PBK/ABK), and 23 diabetic corneas. The VEGF RNA levels were significantly decreased in the keratoconus and PBK/ABK corneas but increased in the diabetic corneas. BMP-2 gene expression was lower than normal in the PBK/ABK and diabetic corneas. IGF-I and BMP-4 RNA levels were increased in PBK/ABK. In the immunohistochemical studies, the protein patterns paralleled those found at the mRNA level. The only exception was IGF-I in diabetic corneas that showed increased staining in the epithelium and its basement membrane without a significant increase in mRNA levels. TGF-beta2 mRNA and protein levels were similar to normal in all diseased corneas. Thus, no alterations in the tested growth factors/cytokines were unique to keratoconus corneas. In contrast, PBK/ABK corneas had specific significant elevations of BMP-4 and IGF-I. Diabetic corneas were unique in their increased VEGF mRNA levels. These data suggest that while some growth factor/cytokine alterations are non-specific and can be found in multiple corneal diseases, there are others that are unique to that disease.

Altered expression of growth factors and cytokines in keratoconus, bullous keratopathy and diabetic human corneas. Publishing Authors By Initials

M Saghizadeh,M Chwa,A Aoki,B Lin,A Pirouzmanesh,DJ Brown,AV Ljubimov,MC Kenney,

For similar peptides: intercellular signaling peptides and proteins: cytokines: transforming growth factor beta research abstracts see: peptides: intercellular signaling peptides and proteins: cytokines: transforming growth factor beta research

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Altered expression of growth factors and cytokines in keratoconus, bullous keratopathy and diabetic human corneas. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Experimental eye research

VOLUME: 73

Page Numbers: 179-89

Journal Abbreviation: Exp. Eye Res.

ISSN: 0014-4835

DAY: 19

MONTH: Aug

YEAR: 2001

Altered expression of growth factors and cytokines in keratoconus, bullous keratopathy and diabetic human corneas. Information

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LANGUAGE: eng

NlmUniqueID: 370707

Altered expression of growth factors and cytokines in keratoconus, bullous keratopathy and diabetic human corneas. Keywords Mesh Terms:

KEYWORDS: Transforming Growth Factor beta

MESH TERMS: metabolism

Chemical & Substance for Abstract: Altered expression of growth factors and cytokines in keratoconus, bullous keratopathy and diabetic human corneas. Information

Substance Name: Insulin-Like Growth Factor I

Registry Number: 67763-96-6

Grant and Affiliation Information for Altered expression of growth factors and cytokines in keratoconus, bullous keratopathy and diabetic human corneas.

AFFILIATION: Ophthalmology Research Laboratories, Burns and Allen Research Institute, Cedars-Sinai Medical Center, UCLA Medical School Affiliate, Los Angeles, CA 90048, USA.

Country: England

AGENCY: United States NEI

GRANT: EY6807

ACRONYM: EY

MEDLINETA: Exp Eye Res

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