Differential Effects of Trabecular Meshwork Stiffness on Outflow Facility in Normal Human and Porcine Eyes

2012 ◽  
Vol 53 (9) ◽  
pp. 5242 ◽  
Author(s):  
Lucinda J. Camras ◽  
W. Daniel Stamer ◽  
David Epstein ◽  
Pedro Gonzalez ◽  
Fan Yuan
Keyword(s):  
Trabecular Meshwork ◽  
Outflow Facility ◽  
Differential Effects ◽  
Normal Human ◽  
Porcine Eyes

scholarly journals Impact of freeze-thaw cytoablation on aqueous outflow patterns in ex vivo anterior chamber perfusion cultures and whole eyes

F1000Research ◽  
2021 ◽  
Vol 10 ◽  
pp. 525
Author(s):  
Raoul Verma-Fuehring ◽  
Mohamad Dakroub ◽  
Alicja Strzalkowska ◽  
Piotr Strzalkowski ◽  
Hong Han ◽  
...  
Keyword(s):  
Trabecular Meshwork ◽  
Structural Changes ◽  
Ex Vivo ◽  
Anterior Segment ◽  
Large Change ◽  
Invasive Technique ◽  
Freeze Thaw ◽  
Before And After ◽  
Human Eyes ◽  
Porcine Eyes

Background: Porcine eyes have been widely used as ex vivo models in glaucoma research, as they share similar features with human eyes. Freeze-thawing is a non-invasive technique that has been used to obliterate living cells in anterior segment ex vivo cultures, to prepare them for further research such as cellular repopulation. This technique has previously been shown to reduce the intraocular pressure (IOP) in porcine eyes. The aim of this study was to investigate whether freeze-thaw cytoablation causes corresponding canalogram outflow changes in perfused anterior segment cultures (AFT) and whole porcine eyes (WFT). We hypothesized that the known IOP drop in AFT after trabecular meshwork ablation by freeze-thaw would be accompanied by a similarly large change in the distal outflow pattern. Methods: Two-dye (fluorescein and Texas red) reperfusion canalograms were used to compare the outflow time before and after two -80°C cycles of freeze-thaw. We assigned 28 freshly enucleated porcine eyes to four groups: perfused anterior segment dye controls (ACO, n = 6), perfused whole eye dye controls (WCO, n = 6), freeze-thaw treated anterior segment cultures (AFT, n = 10), and freeze-thaw treated whole eyes (WFT, n = 6). Results: In control groups ACO and WCO, the two different dyes had similar filling times. In AFT, the outflow pattern and filling times were unchanged. In WFT, the temporal superior quadrant filled more slowly (p = 0.042) while all others remained unchanged. The qualitative appearance of distal outflow spaces was altered only in some eyes. Conclusions: Freeze-thaw cytoablation caused neither loss nor leakage of distal outflow structures. Surprisingly, the loss of an intact trabecular meshwork over the entire circumference did not result in a general acceleration of quadrant outflow times. The results validate freeze-thawing as a method to generate an extracellular matrix without major structural changes.

Multiphoton gonioscopy to image the trabecular meshwork of porcine eyes

2013 ◽  
Author(s):  
Omid Masihzadeh ◽  
David A. Ammar ◽  
Malik Y. Kahook ◽  
Emily A. Gibson ◽  
Tim C. Lei
Keyword(s):  
Trabecular Meshwork ◽  
Porcine Eyes

scholarly journals Direct trabecular meshwork imaging in porcine eyes through multiphoton gonioscopy

2013 ◽  
Vol 18 (3) ◽  
pp. 036009 ◽  
Author(s):  
Omid Masihzadeh ◽  
David A. Ammar ◽  
Malik Y. Kahook ◽  
Emily A. Gibson ◽  
Tim C. Lei
Keyword(s):  
Trabecular Meshwork ◽  
Porcine Eyes

scholarly journals Prostaglandins Increase Trabecular Meshwork Outflow Facility in Cultured Human Anterior Segments

2008 ◽  
Vol 145 (1) ◽  
pp. 114-119 ◽  
Author(s):  
Cindy K. Bahler ◽  
Kyle G. Howell ◽  
Cheryl R. Hann ◽  
Michael P. Fautsch ◽  
Douglas H. Johnson
Keyword(s):  
Trabecular Meshwork ◽  
Outflow Facility ◽  
Anterior Segments

scholarly journals Perturbation of Hyaluronan Synthesis in the Trabecular Meshwork and the Effects on Outflow Facility

2012 ◽  
Vol 53 (8) ◽  
pp. 4616 ◽  
Author(s):  
Kate E. Keller ◽  
Ying Ying Sun ◽  
Yong-Feng Yang ◽  
John M. Bradley ◽  
Ted S. Acott
Keyword(s):  
Trabecular Meshwork ◽  
Outflow Facility

Ultrastructural immunocytochemical localization of elastin in normal human trabecular meshwork

1989 ◽  
Vol 8 (10) ◽  
pp. 1071-1081 ◽  
Author(s):  
Haiyan Gong ◽  
Vickery Trinkaus-Randall ◽  
Thomas F. Freddo
Keyword(s):  
Trabecular Meshwork ◽  
Immunocytochemical Localization ◽  
Normal Human
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