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A study of corneal structure and biomechanical properties after collagen crosslinking with genipin in rabbit corneas
PURPOSE: Aim to assess the short-term effect of genipin collagen crosslinking (G-CXL) on corneal structure and biomechanical properties compared with ultraviolet A/riboflavin collagen crosslinking (UVA-CXL) in rabbit corneas. METHODS: Right eyes of 40 healthy rabbits were divided into the 0.20% G-CX...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Molecular Vision
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6798704/ https://www.ncbi.nlm.nih.gov/pubmed/31673223 |
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author | Tang, Yun Song, Wenjing Qiao, Jing Rong, Bei Wu, Yuan Yan, Xiaoming |
author_facet | Tang, Yun Song, Wenjing Qiao, Jing Rong, Bei Wu, Yuan Yan, Xiaoming |
author_sort | Tang, Yun |
collection | PubMed |
description | PURPOSE: Aim to assess the short-term effect of genipin collagen crosslinking (G-CXL) on corneal structure and biomechanical properties compared with ultraviolet A/riboflavin collagen crosslinking (UVA-CXL) in rabbit corneas. METHODS: Right eyes of 40 healthy rabbits were divided into the 0.20% G-CXL group, 0.25% G-CXL group, UVA-CXL group, and control group. Anterior segment optical coherence tomography (ASOCT) and in vivo confocal microscopy (IVCM) were performed before, 7 days after, and 14 days after the CXL treatment. Corneal strips were harvested for tensile strain measurements 7 and 14 days after the CXL treatment. RESULTS: ASOCT showed the demarcation line (DL) in the UVA-CXL group was deeper than in the 0.20% G-CXL group and the 0.25% G-CXL group on day 7 (p=0.014) and day 14 (p=0.012). Nerve and keratocyte density in all CXL groups decreased, but was more obvious in the UVA-CXL group (p<0.001). Endothelial cell loss in the 0.20% G-CXL group, 0.25% G-CXL group, UVA-CXL group, and control group was 11.7%, 6.8%, 32.8%, and 2.0% 14 days after CXL, respectively. Young’s modulus and stress in the 0.25% G-CXL group and the UVA-CXL group were statistically significantly higher than in the control group (p<0.05) 7 and 14 days after CXL. No statistically significant differences were observed between the 0.25% G-CXL group and the UVA-CXL group (p>0.05). The DL depth was positively correlated with Young’s modulus (r=0.426, p=0.042) and stress (r=0.469, p=0.024). CONCLUSIONS: The administration of 0.25% genipin enhances corneal biomechanical properties as long as 14 days after the CXL treatment with low toxicity. The DL exists in CXL-treated corneas, and the depth is related to the biomechanical properties. |
format | Online Article Text |
id | pubmed-6798704 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Molecular Vision |
record_format | MEDLINE/PubMed |
spelling | pubmed-67987042019-10-31 A study of corneal structure and biomechanical properties after collagen crosslinking with genipin in rabbit corneas Tang, Yun Song, Wenjing Qiao, Jing Rong, Bei Wu, Yuan Yan, Xiaoming Mol Vis Research Article PURPOSE: Aim to assess the short-term effect of genipin collagen crosslinking (G-CXL) on corneal structure and biomechanical properties compared with ultraviolet A/riboflavin collagen crosslinking (UVA-CXL) in rabbit corneas. METHODS: Right eyes of 40 healthy rabbits were divided into the 0.20% G-CXL group, 0.25% G-CXL group, UVA-CXL group, and control group. Anterior segment optical coherence tomography (ASOCT) and in vivo confocal microscopy (IVCM) were performed before, 7 days after, and 14 days after the CXL treatment. Corneal strips were harvested for tensile strain measurements 7 and 14 days after the CXL treatment. RESULTS: ASOCT showed the demarcation line (DL) in the UVA-CXL group was deeper than in the 0.20% G-CXL group and the 0.25% G-CXL group on day 7 (p=0.014) and day 14 (p=0.012). Nerve and keratocyte density in all CXL groups decreased, but was more obvious in the UVA-CXL group (p<0.001). Endothelial cell loss in the 0.20% G-CXL group, 0.25% G-CXL group, UVA-CXL group, and control group was 11.7%, 6.8%, 32.8%, and 2.0% 14 days after CXL, respectively. Young’s modulus and stress in the 0.25% G-CXL group and the UVA-CXL group were statistically significantly higher than in the control group (p<0.05) 7 and 14 days after CXL. No statistically significant differences were observed between the 0.25% G-CXL group and the UVA-CXL group (p>0.05). The DL depth was positively correlated with Young’s modulus (r=0.426, p=0.042) and stress (r=0.469, p=0.024). CONCLUSIONS: The administration of 0.25% genipin enhances corneal biomechanical properties as long as 14 days after the CXL treatment with low toxicity. The DL exists in CXL-treated corneas, and the depth is related to the biomechanical properties. Molecular Vision 2019-10-06 /pmc/articles/PMC6798704/ /pubmed/31673223 Text en Copyright © 2019 Molecular Vision. http://creativecommons.org/licenses/by-nc-nd/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited, used for non-commercial purposes, and is not altered or transformed. |
spellingShingle | Research Article Tang, Yun Song, Wenjing Qiao, Jing Rong, Bei Wu, Yuan Yan, Xiaoming A study of corneal structure and biomechanical properties after collagen crosslinking with genipin in rabbit corneas |
title | A study of corneal structure and biomechanical properties after collagen crosslinking with genipin in rabbit corneas |
title_full | A study of corneal structure and biomechanical properties after collagen crosslinking with genipin in rabbit corneas |
title_fullStr | A study of corneal structure and biomechanical properties after collagen crosslinking with genipin in rabbit corneas |
title_full_unstemmed | A study of corneal structure and biomechanical properties after collagen crosslinking with genipin in rabbit corneas |
title_short | A study of corneal structure and biomechanical properties after collagen crosslinking with genipin in rabbit corneas |
title_sort | study of corneal structure and biomechanical properties after collagen crosslinking with genipin in rabbit corneas |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6798704/ https://www.ncbi.nlm.nih.gov/pubmed/31673223 |
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