The Role of Laminin-5 in TGFα/EGF-Mediated Corneal Epithelial Cell Motility

1998 ◽  
Vol 66 (5) ◽  
pp. 569-579 ◽  
Author(s):  
PING QIN ◽  
MICHELLE A. KURPAKUS
2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Kyu-Yeon Han ◽  
Jennifer A. Tran ◽  
Jin-Hong Chang ◽  
Dimitri T. Azar ◽  
James D. Zieske

2019 ◽  
Vol 103 (9) ◽  
pp. 1204-1208 ◽  
Author(s):  
Shawn Rong Lin ◽  
Anthony J Aldave ◽  
James Chodosh

Recurrent corneal erosion syndrome (RCES) is a disorder characterised by a dysfunctional epithelial ecosystem. It often begins after trauma, or in the setting of epithelial basement membrane degeneration or dystrophy. Historically, RCES has been understood as a structural derangement of the anterior corneal architecture. More recently, studies have demonstrated the important role of neuropeptides in corneal homoeostasis. Thus, RCES may also be understood as a disorder of corneal epithelial cell biology. Management of RCES can be challenging, but newer therapies have demonstrated improved efficacy for this condition. This review examines the aetiology and pathogenesis of RCES, and provides an update on current and emerging treatment modalities for the management of this disorder.


1994 ◽  
Vol 59 (4) ◽  
pp. 385-392 ◽  
Author(s):  
Chie Sotozono ◽  
Shigeru Kinoshita ◽  
Masakazu Kita ◽  
Jiro Imanishi

2011 ◽  
Vol 52 (6) ◽  
pp. 3181 ◽  
Author(s):  
Kazuhiro Kimura ◽  
Shinichiro Teranishi ◽  
Tomoko Orita ◽  
Hongyan Zhou ◽  
Teruo Nishida

2001 ◽  
Vol 276 (24) ◽  
pp. 21714-21723 ◽  
Author(s):  
Zhiyi Cao ◽  
Zheng Zhao ◽  
Royce Mohan ◽  
Joseph Alroy ◽  
Pamela Stanley ◽  
...  

2001 ◽  
Vol 114 (22) ◽  
pp. 4033-4040
Author(s):  
Miechia A. Esco ◽  
Zhiyu Wang ◽  
Mark L. McDermott ◽  
Michelle Kurpakus-Wheater

Laminin 5 functions to promote cell-matrix adhesion and therefore is hypothesized to abrogate apoptosis initiated through the loss of epithelial cell contact with extracellular matrix. Laminin 5 levels are decreased in epithelial cells cultured in a hypoxic environment. Exposure of epithelial cells to hypoxia may induce apoptotic pathways transmitted through changes in mitochondrial membrane potential. Using an apoptosis assay based on mitochondrial membrane integrity, the effect of hypoxia (2% oxygen) on human corneal epithelial cell viability was determined. Both a virally transformed corneal epithelial cell line and third passage corneal epithelial cells were resistant to hypoxia-mediated apoptosis for up to 5 days in culture. However, at 7 days in culture, a statistically significant increase in apoptosis was noted in hypoxic corneal epithelial cells compared to normoxic (20% oxygen) controls. Increased apoptosis in hypoxic epithelium at 7 days in culture correlated with decreased deposition of laminin 5 into the extracellular matrix, as determined by western blot analysis and immunofluorescence microscopy. Additionally, the extracellular processing of the α3 and γ2 chains of laminin 5 was negatively impacted by corneal epithelial cell exposure to hypoxia for 7 days. Treatment of human corneal epithelial cells cultured in 20% oxygen with function-inhibiting antibodies to laminin 5 for 2 or 3 days resulted in a statistically significant decrease in proliferation, and concomitant increase in apoptosis, compared with untreated normoxic controls. Based on these results, it appears that mechanisms of hypoxia-mediated apoptosis in human corneal epithelial cells may be initiated by the loss of processed laminin 5 in the extracellular matrix or by the loss of laminin 5-epithelial cell communication and transmitted through mitochondria.


2021 ◽  
Vol 222 (7) ◽  
pp. 2170013
Author(s):  
Michael G. Sun ◽  
Yuncin Luo ◽  
Tao Teng ◽  
Victor Guaiquil ◽  
Qiang Zhou ◽  
...  

1988 ◽  
Vol 7 (3) ◽  
pp. 293-301 ◽  
Author(s):  
J. D. Cameron ◽  
S. T. Hagen ◽  
R. R. Waterfield ◽  
L. T. Furcht

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