Ophthalmic imaging of small animal models of ocular diseases

眼部疾病小动物模型的眼科成像

• 批准号: 7755760
• 负责人: Shuliang Jiao
• 金额: $ 18.82万
• 依托单位: UNIVERSITY OF SOUTHERN CALIFORNIA
• 依托单位国家: 美国
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-05 至 2010-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7755760
• 关键词: Animal Model; Disease; Image

DESCRIPTION (provided by applicant): Small animal models play an irreplaceable role in the study of ocular diseases, but the need for structural information at different stages of a disease leads to time-consuming histology, inefficient use of animals, and large variability. Our long-term objective is to develop a high throughput testing facility that provides quantitative, non-invasive, high resolution, structural imaging of animal models of ophthalmic diseases. By high throughput we mean the acquisition of images and the extraction of desired information as efficiently and rapidly as possible, thereby maximizing the scientific yield of the facility. The facility will use a novel investigator-controlled animal alignment system that allows rapid selection of the imaged retinal areas together with ultra-high resolution spectral-domain OCT (optical coherence tomography) to provide 3D retinal images. To evaluate disease-induced damage and progression and to monitor treatment effects, the cell layers of the retina will be quantified using 3D segmentation of the OCT images. This project promises to significantly reduce the number of animals needed to achieve many research objectives. Collaborating scientists using small animal models for their research will provide valuable feedback to enhance the facility's productivity. The specific aims of the proposed research are to: 1. Design and build a novel animal alignment system together with a slit lamp biomicroscope based ultra-high resolution spectral-domain OCT and robust interchangeable optical probes for high throughput imaging of the anterior segment and retina of small animals. The animal alignment system that allows rapid selection of the imaging areas of interest. 2. Develop 3-D segmentation algorithms for (1) automatic segmentation of the RNFL of the retina and (2) automatic segmentation of the boundaries of retinal tumor. These algorithms will provide quantitative information (e.g., RNFL thickness maps and tumor volume) about the change that occurs at different stages of a disease. 3. Apply the system and algorithms to studying animal models of ocular diseases. We will first focus on three rodent models: (1) we will image changes in retinal structure in a rat glaucoma model, including changes of optic nerve and RNFL thickness at different stages of glaucoma damage; (2) We will quantitatively evaluate progression and treatment effect in a mouse model of retinoblastoma; (3) We will study the status and prognosis of a murine model of corneal transplant. PUBLIC HEALTH RELEVANCE: The proposed research will provide a powerful tool that will greatly accelerate the research on ocular diseases like glaucoma, retinoblastoma, and corneal transplant. It promises not only to reduce the number of animals required but also possible longitudinal studies that are currently impossible to conduct.

描述（申请人提供）：小动物模型在眼部疾病研究中发挥着不可替代的作用，但对疾病不同阶段结构信息的需求导致组织学耗时、动物使用效率低、变异性大。我们的长期目标是开发一种高通量的检测设备，为眼科疾病的动物模型提供定量、非侵入性、高分辨率的结构成像。高通量是指尽可能高效、快速地获取图像和提取所需信息，从而最大限度地提高设施的科学产量。该设施将使用一种新型的闪烁器控制的动物对准系统，该系统允许快速选择成像的视网膜区域以及超高分辨率的光谱域OCT（光学相干断层扫描），以提供3D视网膜图像。为了评价疾病引起的损伤和进展并监测治疗效果，将使用OCT图像的3D分割来量化视网膜的细胞层。该项目有望大幅减少实现许多研究目标所需的动物数量。使用小动物模型进行研究的合作科学家将提供有价值的反馈，以提高设施的生产力。本研究的具体目的是：1。设计并构建一种新型动物对准系统，以及基于裂隙灯生物显微镜的超高分辨率光谱域OCT和耐用的可互换光学探头，用于小动物眼前节和视网膜的高通量成像。动物对准系统允许快速选择感兴趣的成像区域。2.开发三维分割算法，用于（1）视网膜RNFL的自动分割和（2）视网膜肿瘤边界的自动分割。这些算法将提供定量信息（例如，RNFL厚度图和肿瘤体积）关于在疾病的不同阶段发生的变化。3.将系统和算法应用于眼科疾病动物模型的研究。我们将首先关注三种啮齿动物模型：（1）我们将在大鼠青光眼模型中成像视网膜结构的变化，包括青光眼损伤不同阶段的视神经和RNFL厚度的变化;（2）我们将定量评估视网膜母细胞瘤小鼠模型的进展和治疗效果;（3）我们将研究角膜移植小鼠模型的状态和预后。公共卫生关系：拟议的研究将提供一个强大的工具，大大加速对青光眼、视网膜母细胞瘤和角膜移植等眼部疾病的研究。它不仅有望减少所需的动物数量，而且还可能减少目前无法进行的纵向研究。