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Brimonidine reduces TGF-beta-induced extracellular matrix synthesis in human Tenon’s fibroblasts

Overview of attention for article published in BMC Ophthalmology, May 2015
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Title
Brimonidine reduces TGF-beta-induced extracellular matrix synthesis in human Tenon’s fibroblasts
Published in
BMC Ophthalmology, May 2015
DOI 10.1186/s12886-015-0045-8
Pubmed ID
Authors

Samin Hong, Sueng-Han Han, Chan Yun Kim, Kang Yoon Kim, Yoo Kyung Song, Gong Je Seong

Abstract

Brimonidine is a highly selective α2 adrenergic agonist that has been widely used in anti-glaucoma eyedrops. The aim of this study was to investigate its putative anti-fibrotic role in the fibrosis caused by activated Tenon's fibroblasts. Primary cultured human Tenon's fibroblasts were exposed to 2.0 ng/mL of transforming growth factor-β1 (TGF-β1) for up to 48 h. In the presence of various concentrations of brimonidine (from 0.0 to 10.0 μM), the expression levels of fibronectin, collagen types I and III, and β-actin were determined by Western immunoblots. The expression of phosphorylated SMAD2/3 (p-SMAD2/3) was then evaluated using immunofluorescence. TGF-β1 significantly increased the synthesis of fibronectin and collagens in human Tenon's fibroblasts; however brimonidine treatment distinctly attenuated the TGF-β1-induced production of extracellular matrix (ECM) proteins. TGF-β1 also changed the cellular morphology to be plump, while brimonidine treatment returned the cells to a spindle shape, similar to control fibroblasts. Regarding p-SMAD2/3, brimonidine treatment did not show any apparent changes in its expression. Our data revealed that brimonidine reduces TGF-β-induced ECM synthesis in human Tenon's fibroblasts in vitro. This finding implies that topical administration of brimonidine may be helpful in reducing the fibrosis caused by the long-term use of topical anti-glaucoma medications.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 12 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Egypt 1 8%
Unknown 11 92%

Demographic breakdown

Readers by professional status Count As %
Student > Master 4 33%
Professor 1 8%
Student > Doctoral Student 1 8%
Other 1 8%
Unknown 5 42%
Readers by discipline Count As %
Medicine and Dentistry 5 42%
Biochemistry, Genetics and Molecular Biology 2 17%
Social Sciences 1 8%
Computer Science 1 8%
Unknown 3 25%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 29 May 2015.
All research outputs
#20,274,720
of 22,807,037 outputs
Outputs from BMC Ophthalmology
#2,075
of 2,338 outputs
Outputs of similar age
#222,918
of 266,679 outputs
Outputs of similar age from BMC Ophthalmology
#22
of 29 outputs
Altmetric has tracked 22,807,037 research outputs across all sources so far. This one is in the 1st percentile – i.e., 1% of other outputs scored the same or lower than it.
So far Altmetric has tracked 2,338 research outputs from this source. They receive a mean Attention Score of 2.7. This one is in the 1st percentile – i.e., 1% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 266,679 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 1st percentile – i.e., 1% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 29 others from the same source and published within six weeks on either side of this one. This one is in the 1st percentile – i.e., 1% of its contemporaries scored the same or lower than it.