Tissue reaction after intrastromal corneal ring implantation in an experimental animal model

Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie
Lucia Ibares-FriasMaría Carmen Martínez-García

Abstract

To evaluate corneal wound healing in the hen animal model after additive surgery with an intracorneal ring segment (ICRS). We implanted one ICRS in each eye of 76 hens. In control group 1 (n = 22 hens), the stromal channel was prepared but no ICRS was inserted. In control group 2 (n = 2 hens), no surgery was performed. Animals were randomly separated into groups and euthanized after clinical follow-up of 4 and 12 hours, 1, 2, 3, and 7 days, and 1, 2, 3, 4, and 6 months. Corneas were stained with hematoxylin-eosin. Apoptosis was measured by terminal uridine nick end-labeling assays. Cell proliferation and myofibroblast-like differentiation were assayed by BrdU and α-smooth muscle actin immunofluorescence microscopy. Stromal matrix changes were documented by electron microscopy. Epithelial and stromal cell apoptosis around the ICRS-implanted and control group 1 eyes peaked at 12 hours, but continued for 72 hours. In ICRS-implanted eyes, epithelial and stromal proliferation was present at 12 and 24 hours, respectively, and peaked at 7 days and 72 hours, respectively. Some proliferation in the ICRS-implanted group continued through the 6-month follow-up, and myofibroblast-like cells differentiated one to three months after ICRS imp...Continue Reading

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Citations

Feb 19, 2016·Current Eye Research·Lucía Ibares-FríasMaría Carmen Martínez-García
Feb 14, 2019·BioMed Research International·Juan M BuenoM Carmen Martínez-García
Nov 6, 2020·Translational Vision Science & Technology·Miguel Ángel Ariza-GraciaBegoña Calvo
Nov 7, 2019·Ophthalmic Research·Lucía Ibares-FríasMaría Carmen Martínez-García

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Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis