当前位置: X-MOL 学术Brain Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Prolactin treatment reduces kainic acid-induced gliosis in the hippocampus of ovariectomized female rats.
Brain Research ( IF 2.9 ) Pub Date : 2020-07-09 , DOI: 10.1016/j.brainres.2020.147014
Julio Reyes-Mendoza 1 , Teresa Morales 1
Affiliation  

Neuroinflammation involves a set of responses occurring as a result of brain damage including astro- and microgliosis. In previous studies, we showed that treatment with prolactin (PRL) decreased neuronal loss induced by kainic acid (KA) in the hippocampus of female rats. This effect correlated with a decrease in astrogliosis. Here, we investigate whether treatment with PRL decreases astro- and microgliosis in the dorsal hippocampus, and how it modulates the expression of some important inflammatory factors such as TNFα, iNOS, IL-6, IL-10 and IL-4 after an excitotoxic lesion. For this, ovariectomized female rats were treated chronically with PRL (0.1 mg / day for 4 days, SC). On the third day of treatment, they received a KA injection (7.5 mg / kg, IP) and were sacrificed 24 or 48 h later. Chronic treatment with PRL reduced the astro- and micro-gliosis in CA4, CA3, and CA1 hippocampal subfields induced by KA. Morphometric analysis in CA4 showed that PRL reduced microglial activation. The analysis for anti- and pro-inflammatory cytokines revealed an increase of IL-10 and IL-4 in neurons due to treatment with PRL, accompanied by a decrease in the expression of TNFα and iNOS in lesioned rats. These results indicate that PRL has anti-inflammatory actions in the hippocampus, both by decreasing the astrogliosis and microglial activation and by reducing the level of pro-inflammatory cytokines probably through the upregulation of neuronal IL-10 and IL-4.



中文翻译:

催乳素治疗减少了去卵巢雌性大鼠海马中红藻氨酸诱导的神经胶质增生。

神经炎症涉及一组因脑损伤(包括星状胶质细胞增生症和小胶质细胞增生症)而发生的反应。在之前的研究中,我们发现用催乳素 (PRL) 治疗减少了雌性大鼠海马中红藻氨酸 (KA) 诱导的神经元丢失。这种效应与星形胶质细胞增生的减少有关。在这里,我们研究了 PRL 治疗是否会减少背侧海马中的星形胶质细胞增生和小胶质细胞增生,以及它如何在兴奋性毒性病变后调节一些重要炎症因子的表达,如 TNFα、iNOS、IL-6、IL-10 和 IL-4 . 为此,用PRL(0.1mg/天,连续4天,SC)长期治疗切除卵巢的雌性大鼠。在治疗的第三天,他们接受了 KA 注射(7.5 毫克/公斤,IP),并在 24 或 48 小时后处死。用 PRL 长期治疗可减少 KA 诱导的 CA4、CA3 和 CA1 海马亚区中的星形和微神经胶质增生。CA4 中的形态测量分析表明 PRL 减少了小胶质细胞的激活。抗炎和促炎细胞因子的分析显示,由于用 PRL 治疗,神经元中 IL-10 和 IL-4 增加,同时病变大鼠中 TNFα 和 iNOS 的表达降低。这些结果表明,PRL 在海马体中具有抗炎作用,通过减少星形胶质细胞增生和小胶质细胞活化以及可能通过神经元 IL-10 和 IL-4 的上调降低促炎细胞因子的水平。抗炎和促炎细胞因子的分析显示,由于用 PRL 治疗,神经元中 IL-10 和 IL-4 增加,同时病变大鼠中 TNFα 和 iNOS 的表达降低。这些结果表明,PRL 在海马体中具有抗炎作用,通过减少星形胶质细胞增生和小胶质细胞活化以及可能通过神经元 IL-10 和 IL-4 的上调降低促炎细胞因子的水平。抗炎和促炎细胞因子的分析显示,由于用 PRL 治疗,神经元中 IL-10 和 IL-4 增加,同时病变大鼠中 TNFα 和 iNOS 的表达降低。这些结果表明,PRL 在海马体中具有抗炎作用,通过减少星形胶质细胞增生和小胶质细胞活化以及可能通过神经元 IL-10 和 IL-4 的上调降低促炎细胞因子的水平。

更新日期:2020-07-16
down
wechat
bug