Regional TNFα mapping in the brain reveals the striatum as a neuroinflammatory target after ventricular fibrillation cardiac arrest in rats.

Regional TNFα mapping in the brain reveals the striatum as a neuroinflammatory target after ventricular fibrillation cardiac arrest in rats.
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DOI:
10.1016/j.resuscitation.2014.01.033
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发表时间:
2014-05
期刊:
影响因子:
6.5
通讯作者:
Drabek T
Drabek T
中科院分区:
医学2区
文献类型:
--
作者:
Janata A;Magnet IA;Uray T;Stezoski JP;Janesko-Feldman K;Tisherman SA;Kochanek PM;Drabek T

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心脏骤停(CA)会引发神经炎症,可能导致延迟性神经元死亡。在我们之前建立的以广泛神经元死亡为特征的心室颤动(VF)CA大鼠模型中,我们测试了以下假设:各个大脑区域具有特定的神经炎症反应,如肿瘤坏死因子(TNF)α和其他细胞因子的区域脑组织水平所反映。在一项前瞻性研究中,大鼠被随机分为 6 分钟(CA6)、8 分钟(CA8)或 10 分钟(CA10)VF CA 组或假手术组。 CA后3小时、6小时或14天通过ELISA和Luminex评估皮质、纹状体、海马和小脑的TNFα和白细胞介素(IL)-1α、IL-1β、IL-2、IL-4、IL-6、IL-10、IL-12和干扰素γ。采用免疫组织化学法确定TNFα的细胞来源。 CA 导致选择性 TNFα 反应,具有显着的区域和时间差异。 CA 后 3 小时,所有区域的 TNFα 水平均有所增加,具体取决于损伤的持续时间。最明显的增加出现在纹状体中,与假手术组相比,CA10 增加了 20 倍,与 CA6 或 CA8 组相比,分别增加了 3 倍(p < 0.01)。纹状体中的TNFα水平在3小时至6小时之间下降,但在其他区域在3小时至14天之间增加。 14 天时,CA6 脑区的 TNFα 水平仍然比假手术组高两倍(p < 0.01)。与显着的 TNFα 反应相反,CA6 和 CA8 组的所有脑区与假手术组相比,其他细胞因子仅显示出最小的增加,但小脑和纹状体中的 IL-1β 增加了一倍(p < 0.01)。 TNFα 与神经元共定位。总之,CA 产生了持续时间依赖性的急性 TNFα 反应,其中 TNFα 与神经元共定位的纹状体急剧增加。 TNFα 水平升高持续至少两周。这种 TNFα 的激增与 CA 后大脑中其他细胞因子没有急剧增加形成鲜明对比。鉴于纹状体是一个选择性脆弱的大脑区域,我们的数据表明神经元 TNFα 在 CA 后纹状体中可能发挥作用,并确定未来实验的治疗靶点。
Cardiac arrest (CA) triggers neuroinflammation that could play a role in a delayed neuronal death. In our previously established rat model of ventricular fibrillation (VF) CA characterized by extensive neuronal death, we tested the hypothesis that individual brain regions have specific neuroinflammatory responses, as reflected by regional brain tissue levels of tumor necrosis factor (TNF)α and other cytokines. In a prospective study, rats were randomized to 6 min (CA6), 8 min (CA8) or 10 min (CA10) of VF CA, or sham group. Cortex, striatum, hippocampus and cerebellum were evaluated for TNFα and interleukin (IL)-1α, IL-1β, IL-2, IL-4, IL-6, IL-10, IL-12 and interferon gamma at 3 h, 6 h or 14 d after CA by ELISA and Luminex. Immunohistochemistry was used to determine the cell source of TNFα. CA resulted in a selective TNFα response with significant regional and temporal differences. At 3 h after CA, TNFα-levels increased in all regions depending on the duration of the insult. The most pronounced increase was observed in striatum that showed 20-fold increase in CA10 vs. sham, and 3-fold increase vs. CA6 or CA8 group, respectively (p < 0.01). TNFα levels in striatum decreased between 3 h and 6 h, but increased in other regions between 3 h and 14 d. TNFα levels remained twofold higher in CA6 vs. shams across brain regions at 14 d (p < 0.01). In contrast to pronounced TNFα response, other cytokines showed only a minimal increase in CA6 and CA8 groups vs. sham in all brain regions with the exception that IL-1β increased twofold in cerebellum and striatum (p < 0.01). TNFα colocalized with neurons. In conclusion, CA produced a duration-dependent acute TNFα response, with dramatic increase in the striatum where TNFα colocalized with neurons. Increased TNFα levels persist for at least two weeks. This TNFα surge contrasts the lack of an acute increase in other cytokines in brain after CA. Given that striatum is a selectively vulnerable brain region, our data suggest possible role of neuronal TNFα in striatum after CA and identify therapeutic targets for future experiments.
DOI: 10.1097/ccm.0b013e318287f51e
发表时间: 2013-09-01
影响因子: 8.8
作者:
Janata, Andreas;Magnet, Ingrid A. M.;Kochanek, Patrick M.
通讯作者: Kochanek, Patrick M.
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发表时间: 1994-07-01
期刊: STROKE
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