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Neuroteratogenic Mechanism of LCM Virus Infection

LCM病毒感染的神经致畸机制

基本信息

批准号：
6855786
负责人：
Daniel J. Bonthius
金额：
$ 16.61万
依托单位：
UNIVERSITY OF IOWA
依托单位国家：
美国
项目类别：
财政年份：
1999
资助国家：
美国
起止时间：
1999-09-30 至 2007-01-31
项目状态：
已结题

项目摘要

DESCRIPTION (provided by applicant): This Research Career Award is a plan to foster the development of Dr. Daniel Bonthius into an independent neuroscientist. This Award is a two-year extension of a three-year parent Award. Dr. Bonthius is a pediatric neurologist with a special interest in the adverse effects of environmental agents, including congenital viral infections, on fetal brain development. His long-term career goal is to become a physician-scientist capable of making meaningful contributions in neuroteratology. The research techniques on which he will focus are those of molecular neurobiology, which are of key importance in the field of neuroteratology. Dr. Bonthius will acquire his new research skills through a combination of didactic courses, skills workshops, technical seminars, and through his research into the neuroteratology of lymphocytic choriomeningitis virus (LCMV) infection. LCMV is a prevalent virus, which can severely damage the developing human fetal brain. Injection of LCMV into the neonatal rat brain provides an excellent model system of human congenital LCMV infection. Dr. Bonthius will utilize this model system to study the neuroteratogenic mechanisms of the viral infection. Following inoculation of the neonatal rat, LCMV selectively infects four brain regions, which include the cerebellum, olfactory bulb, hippocampus, and periventricular region. In each of the four regions, LCMV induces unique forms of pathology with unique time courses. In the cerebellum, LCMV induces an acute destructive process, while in the olfactory bulb, the virus induces an acute hypoplasia. In the hippocampus, LCMV induces no acute pathology, but causes a delayed and severe dropout of dentate granule cells. In the periventricular region, LCMV induces no acute or delayed-onset pathology. The principal goal of this research is to identify the cellular and molecular mechanisms underlying these diverse pathologic changes. The types of immune cells involved in the pathologic processes will be identified. The role of cytokines, chemokines and nitric oxide overproduction will be explored. A second goal of the project is to explore the possibility that alpha-dystroglycan (alpha-DG) is the cellular receptor for LCMV. The topography of alpha-DG expression will be compared with the spatial distribution of LCMV infection. The importance of a-DG in influencing the tropism and infectivity of LCMV will be examined by blocking alpha-DG with an antibody prior to exposure of brain slices to LCMV.

描述（由申请人提供）：这个研究职业奖是一个计划，以促进博士丹尼尔Bonthius发展成为一个独立的神经科学家。该奖项是为期三年的家长奖的两年延长。Bonthius博士是一名儿科神经学家，对环境因素（包括先天性病毒感染）对胎儿大脑发育的不良影响特别感兴趣。他的长期职业目标是成为一名能够在神经畸形学方面做出有意义贡献的医生科学家。他将专注于分子神经生物学的研究技术，这在神经畸形学领域至关重要。Bonthius博士将通过教学课程，技能研讨会，技术研讨会的组合，并通过他对淋巴细胞性脉络丛脑膜炎病毒（LCMV）感染的神经畸形学的研究，获得他的新的研究技能。LCMV是一种流行的病毒，它可以严重损害发育中的人类胎儿大脑。将LCMV注射到新生大鼠脑中提供了一个很好的人类先天性LCMV感染的模型系统。Bonthius博士将利用这个模型系统来研究病毒感染的神经致畸机制。接种新生大鼠后，LCMV选择性感染四个脑区，包括小脑、嗅球、海马和脑室周围区。在四个区域中的每一个区域中，LCMV诱导具有独特时间进程的独特病理形式。在小脑中，LCMV诱导急性破坏性过程，而在嗅球中，病毒诱导急性发育不全。在海马中，LCMV不诱导急性病理，但引起齿状颗粒细胞的延迟和严重脱落。在脑室周围区域，LCMV不会引起急性或延迟发病的病理。本研究的主要目的是确定这些不同的病理变化的细胞和分子机制。将鉴定参与病理过程的免疫细胞的类型。将探讨细胞因子、趋化因子和一氧化氮过量产生的作用。该项目的第二个目标是探索α-肌营养不良蛋白聚糖（α-DG）是LCMV细胞受体的可能性。将α-DG表达的地形图与LCMV感染的空间分布进行比较。将通过在将脑切片暴露于LCMV之前用抗体阻断α-DG来检查α-DG在影响LCMV的向性和感染性中的重要性。