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Published on: May 12, 2020
Development of an Ex Vivo Porcine Eye Model for Exploring the Pathogenicity of Acanthamoeba
Ming-Der Shi1, Ko-Chiang Sung1, Jian-Ming Huang2,3
1Department of Clinical Laboratory, Chest Hospital, Ministry of Health and Welfare, Tainan 717, Taiwan.
Abstract:
Acanthamoeba, a widely distributed free-living amoeba found in various environments, is an opportunistic pathogen responsible for causing Acanthamoeba keratitis, a condition that may lead to blindness. However, identifying the pathogenicity of Acanthamoeba is challenging due to its complex life cycle, ability to adapt to different environments, variable virulence factors, and intricate interactions with the host immune system. Additionally, the development of an effective model for studying Acanthamoeba pathogenicity is limited, hindering a comprehensive understanding of the mechanisms underlying its virulence and host interactions. The aim of this study was to develop an ex vivo model for Acanthamoeba infection using porcine eyeballs and to evaluate the pathogenicity of the Acanthamoeba isolates. Based on slit lamp and biopsy analysis, the developed ex vivo model is capable of successfully infecting Acanthamoeba within 3 days. Histopathological staining revealed that clinical isolates of Acanthamoeba exhibited greater corneal stroma destruction and invasion in this model than environmental isolates. Our results highlight the importance of an ex vivo porcine eye model in elucidating the pathogenesis of Acanthamoeba infection and its potential implications for understanding and managing Acanthamoeba-related ocular diseases.
Insights
A new ex vivo porcine eye model effectively studies Acanthamoeba keratitis, revealing clinical isolates cause more severe corneal damage than environmental ones. This model aids understanding Acanthamoeba pathogenicity and ocular disease management.
Area of Science:
- Ophthalmology
- Microbiology
- Parasitology
Background:
- Acanthamoeba is an opportunistic pathogen causing Acanthamoeba keratitis, a potentially blinding eye infection.
- Studying Acanthamoeba pathogenicity is difficult due to its complex life cycle, adaptability, virulence factors, and host immune interactions.
- Existing models for Acanthamoeba pathogenicity research are limited.
Purpose of the Study:
- To develop an ex vivo model for Acanthamoeba infection using porcine eyeballs.
- To evaluate the pathogenicity of Acanthamoeba isolates in this novel model.
Main Methods:
- Development of an ex vivo porcine eyeball model for Acanthamoeba infection.
- Infection monitoring using slit lamp and biopsy analysis.
- Histopathological staining to assess corneal damage and invasion.
Main Results:
- The ex vivo model successfully infected Acanthamoeba within 3 days.
- Clinical Acanthamoeba isolates demonstrated greater corneal stroma destruction and invasion compared to environmental isolates.
- The model effectively elucidated differences in pathogenicity between Acanthamoeba isolates.
Conclusions:
- The ex vivo porcine eye model is a valuable tool for studying Acanthamoeba pathogenesis.
- This model can help understand Acanthamoeba-related ocular diseases and inform management strategies.
- The findings emphasize the distinct pathogenic potential of clinical versus environmental Acanthamoeba isolates.
