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由康卡纳林注射到乳原区引起的水性干眼病的兔子模型:药物功效研究的应用
由康卡纳林注射到乳原区引起的水性干眼病的兔子模型:药物功效研究的应用
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JoVE Journal Medicine
A Rabbit Model of Aqueous-Deficient Dry Eye Disease Induced by Concanavalin A Injection into the Lacrimal Glands: Application to Drug Efficacy Studies

由康卡纳林注射到乳原区引起的水性干眼病的兔子模型:药物功效研究的应用

Full Text
13,124 Views
08:04 min
January 24, 2020

DOI: 10.3791/59631-v

Robert A. Honkanen1, Liqun Huang2,3, Basil Rigas2

1Department of Ophthalmology,Stony Brook University, 2Department of Preventive Medicine,Stony Brook University, 3Medicon Pharmaceuticals, Inc.

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Please note that some of the translations on this page are AI generated. Click here for the English version.

Overview

This article describes a novel method for inducing acute or chronic dry eye disease in rabbits through the injection of concanavalin A into the lacrimal gland system. This technique offers a reliable and reproducible model for studying dry eye disease and evaluating pharmacological treatments.

Key Study Components

Area of Science

  • Neuroscience
  • Ophthalmology
  • Pharmacology

Background

  • Dry eye disease is a common condition affecting ocular health.
  • Existing animal models for dry eye disease have limitations.
  • Reliable models are essential for testing new treatments.
  • Concanavalin A is known to induce inflammation in lacrimal glands.

Purpose of Study

  • To develop a consistent method for inducing dry eye disease in rabbits.
  • To create a model suitable for pharmacological studies.
  • To enhance the understanding of dry eye disease pathophysiology.

Methods Used

  • Injection of concanavalin A into all portions of the lacrimal gland system.
  • Use of ultrasound guidance for accurate injection.
  • Sequential injections to extend the duration of dry eye symptoms.
  • Assessment of tear production and ocular health post-injection.

Main Results

  • The method reliably induces dry eye disease characterized by decreased tear production.
  • Inflammatory responses were observed in the lacrimal glands.
  • Symptoms lasted approximately one week after a single injection.
  • Repeated injections can lead to a permanent dry eye condition.

Conclusions

  • This method provides a robust model for studying dry eye disease.
  • It allows for the evaluation of therapeutic interventions.
  • Attention to anatomical details and ultrasound guidance is crucial for success.

Frequently Asked Questions

What is dry eye disease?
Dry eye disease is a condition characterized by insufficient tear production or poor tear quality, leading to discomfort and potential damage to the eye.
How does concanavalin A induce dry eye disease?
Concanavalin A induces an inflammatory response in the lacrimal glands, resulting in decreased tear production and dry eye symptoms.
Why is an animal model important for studying dry eye disease?
Animal models allow researchers to investigate the mechanisms of dry eye disease and test potential treatments in a controlled environment.
What are the advantages of this new method?
This method provides a reliable, reproducible model that can be used to study both acute and chronic forms of dry eye disease.
How long do the effects of the injections last?
The effects of a single set of injections typically last about one week, but repeated injections can lead to a more permanent condition.
What precautions should be taken during the procedure?
Proper precautions should be taken to prevent needle stick injuries, and familiarity with cranial anatomy is essential for successful injections.

本文介绍了一种方法,通过注射结沙蛋白A到轨道乳腺系统的所有部分来诱发兔子急性或慢性干眼病。该方法优于已经报告的方法,产生了一种可重复的、稳定的干眼模型,适合药理剂的研究。

我们的方法提供了缺少可靠的干眼病动物模型,由于我们注射所有乳腺和重复注射的方法,它可以是急性或慢性的。该技术通过超声波制导,将康卡纳瓦林 A 可靠地交付给劣质乳腺腺,使其具有广泛可变尺寸的腺体,并高达优越的压接腺体,使这种方法成为一个完整的方法。该模型提供了一种简单、优化、非手术的方法,可诱发缺水的干眼病。

它非常适合研究药物疗效和疾病病理生理学。首先,识别后诊断和利用超声波定位可能具有挑战性。去除所有毛皮对于这两个步骤的超声波定位至关重要。

演示这个程序的将是我实验室的研究生黄伟。通过观察耳塞不再完全直立的放松头部位置来确认轻度电位后,使用微管将 25 微升无防腐剂利多卡因涂抹在第一只眼睛上,并在眼睑之间放置一个灵活的线盖规格。使用0.3钳子,抓住其顶点的膜,并将其扩展到角膜上。

使用26条针,将利多卡因1%与1:100,000第肾上腺素结合注射到注射膜底部。膜上应形成中度出血。然后去除光谱,并作出相同的注射到左电膜。

大约五分钟后,将盖子光谱放回同眼,并使用 0.3 个钳子在其顶点收回转光膜。使用韦斯特科特剪刀,切断其底部的尼特膜,并去除光谱。然后把局部抗生素软膏放在眼睛上。

对于高级乳腺注射的皮脑部分,在确认水化后,在预轨道和头皮区域剪切毛皮,并使用脱毛霜完全去除任何残留的毛皮。两分钟后取出奶油,将25微升1%无防腐剂利多卡因涂抹到适当的眼睛上。长着上眼睑,对后轨道边缘施加温和的中压,直到看到标记腺体眼睑部分的突出。

使用细齿钳和装有27量针的结核素注射器,通过跨结膜方法直接穿透腺体,将针头推进两毫米入组织,并在注射后立即将康卡纳瓦林 A或Con A.的500微克溶液的100微升溶液注入,在注射后立即向地球施加中压,使轨道上优越的拉克里姆腺从后部突出。使用封闭的弯曲钳子,缩进区域,直到在头骨的骨质开口被感觉到,并施加进一步的适度压力与钳子,留下一个缩进在皮肤作为针放置的里程碑。插入一个管状针,该注射器配有一个27量针,垂直于皮肤,在切口上约四分之一英寸,然后将针头后部和外部重定向到侧筒,瞄准注射部位和骨骼轨道边缘之间的中点。

到达针头中心后,缓慢注射0.2毫升的1000微克的 Con A.用于 ILG 注射溶液,从侧面查看动物,沿轨道的下部部分定位 ILG 的突出位置。使用手术标记笔在皮肤上画一条垂直线,其中 ILG 腺体的肤浅部分从酶骨上的表面休息位置过渡到其在轨道上的更中层位置。将垂直持有的超声波探针扫过皮肤上的线,以识别酶骨的端。

ILG 过渡发生在腺体图像从限制的超分线变化为没有可识别的中线边界的线时发生。观察到此变化时,手片与皮肤上绘制的线条的相对位置将是注射部位。将 Con A 放入腺体中,只需向酶拱骨中,请将所需的注射深度设置为酶骨超分信号的深度加上一毫米减去已知针的长度。

将针插入注射部位的腺体约 12 毫米,然后慢慢提取,直到身体外暴露的针头的长度等于计算的差异。然后注射0.2毫升的1000微克的康阿溶液,通过超声波确认注射成功。ILG 应表现出一个特有的超分式空间。

Con A 注射在乳腺中引起强烈的炎症反应,其特征是密集的淋巴细胞性渗透,并伴有减少的泪发生。撕裂乳铁蛋白水平被抑制,导致角膜和结膜上皮受损,玫瑰孟加拉染色增加。三个轨道LG组织的注射产生一致和均匀的干眼病状态。

一组 Con A 注射产生持续约一周的干眼病,所有临床参数在 10 日前正常化。连续的康 A 注射约一周分开延长干眼病的持续时间。大约五组注射后,干眼病状态通常成为永久性的,无需进一步注射。

最佳地本地化压层腺结构是最重要的。熟悉颅骨解剖和注意精细的细节,包括去除毛皮以及使用超声波的技能都改善结果。由于这种简单的技术需要使用利器,调查应采取适当的预防措施,以防止针棒受伤。

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