INOS AND COX2 CEREBRAL BLOOD VESSELS

一氧化氮合酶（NOS）的内皮和神经亚型 似乎在脑循环的调节中起主要作用。 本项目的总体目标是研究 诱导型NOS II和诱导型环氧合酶（考克斯-2）在 脑血管 NOS II和考克斯-2可能是 在血管中对促炎刺激的反应中表达 在某些病理生理条件下。 调查人员 建议检测NOS II和考克斯-2对 血管张力和血脑屏障的渗透性，以及 研究调节这些基因表达的机制。 为了确定NOS II在脑血管中的作用，研究将 使用两种最先进的分子方法进行- NOS II基因敲除小鼠和使用腺病毒的局部过表达 介导的NOS II基因转移。 的功能重要性 核因子-κ β在介导这些反应将是 考察 NOS和考克斯之间可能存在相互作用 系统. 在NOS II敲除小鼠中的研究将允许检查 考克斯-2的功能重要性， 没有NOS II。 白细胞介素-10（IL-10）是一种抗炎因子， 保护免受内毒素休克的细胞因子。 IL-的作用 10血管中的未知数。 使用IL-10敲除小鼠，我们 计划检验白细胞介素10是一种主要的 内源性调节NOS Ⅱ和考克斯-2表达的作用 脑血管 初步数据支持这一假设。 因此，在本发明中， 将采用最先进的方法研究NOS的作用 II、考克斯-2和IL-10。 研究 应该为大脑的调节提供新的见解， 流通 这些基因的表达可能在大脑中起重要作用。 在包括脑膜炎的几种病理生理条件下， 缺血和对炎症刺激的反应。

Endothelial and neuronal isoforms of nitric oxide synthase (NOS) appear to play a major role in regulation of cerebral circulation. The overall objectives of this project is to examine the influence of inducible NOS II and inducible cyclooxygenase (COX-2) on cerebral blood vessels. Both NOS II and COX-2 may be expressed in blood vessels in response to proinflammatory stimuli and under some pathophysiologi-cal conditions. The investigators propose to examine the influence of NOS II and COX-2 on vascular tone and permeability of the blood-brain barrier, and to examine mechanisms which regulate expression of these genes. To define the role of NOS iI in cerebral vessels, studies will now be performed using two state-of-the-art molecular approaches - NOS II knockoutmice and local overexpression using adenoviral- mediated gene transfer of NOS II. The functional importance of nuclear factor-Kappa Beta in mediating these responses will be examined. There may be interactions between the NOS and COX systems. Studies in NOS II knockout mice will allow examination of the functional importance of COX-2 in the presence and absence of NOS II. Interleukin-10 (IL-10) is an anti-inflammatory cytokine which protects against endotoxin shock. The role of IL- 10 in blood vessels is not known. Using IL-10 knockout mice, we plan to examine the hypothesis that interleukin 10 is a major endogenous regulator of expression of NOS II and COX-2 in cerebral vessels. Preliminary data support this hypothesis. Thus, state-of-the-art approaches will be used to study the role of NOS II, COX-2, and IL-10 in cerebral blood vessels. The studies should provide new insight into regulation of the cerebral circulation. Expression of these genes may be important in brain under several pathophysiological conditions including meningitis, ischemia, and in response to inflammatory stimuli.