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Behavioral and histopathological consequences of transient ischemic stroke in the Flinders Sensitive Line rat, a genetic animal model of depression
Brain Research ( IF 2.9 ) Pub Date : 2021-09-04 , DOI: 10.1016/j.brainres.2021.147648
Denise F Happ 1 , Gregers Wegener 2 , R Andrew Tasker 3
Affiliation  

Patients with depression have an increased risk for stroke, higher mortality rates following stroke and worse functional outcomes among survivors. Preclinical studies may help to better understand the underlying mechanisms linking these two diseases, but only a few animal studies have investigated the effects of prestroke depression. The present study investigates whether Flinders Sensitive Line (FSL) rats, a genetic depression model, respond differently to focal ischemic stroke compared to control strains (Flinders Resistant Line [FRL] and Sprague-Dawley [SD]). Male adult FSL, FRL and SD rats received a unilateral injection of either vehicle or Endothelin-1 (ET-1) adjacent to the middle cerebral artery (MCA). Motor function was assessed at 48 h followed by euthanasia and infarct volume measurement using 2,3,5-triphenyltetrazolium chloride (TTC) staining and image analysis. In a separate cohort behavior was assessed using standard tests for motor function, locomotor activity, cognition, anxiety- and depression-like behavior beginning at 10 days post-injection followed by infarct quantification. We found that ET-1-induced MCA occlusion produced significant infarcts in all three strains. Stroke animals had slightly impaired motor function, but there was no clear interaction effects between strain and stroke surgery on behavioral outcomes. We conclude that FSL rats show no increased susceptibility to brain damage or behavioral deficits following ET-1-induced focal ischemic stroke compared to controls.



中文翻译:

Flinders Sensitive Line 大鼠短暂性缺血性中风的行为和组织病理学后果,抑郁症的遗传动物模型

抑郁症患者中风的风险增加,中风后的死亡率更高,幸存者的功能结果更差。临床前研究可能有助于更好地了解连接这两种疾病的潜在机制,但只有少数动物研究调查了卒中前抑郁症的影响。本研究调查了弗林德斯敏感线 (FSL) 大鼠(一种遗传性抑郁模型)与对照品系(弗林德斯抗性线 [FRL] 和 Sprague-Dawley [SD])相比,对局灶性缺血性中风的反应是否不同。雄性成年 FSL、FRL 和 SD 大鼠在大脑中动脉 (MCA) 附近接受单侧注射载体或内皮素-1 (ET-1)。在 48 小时评估运动功能,然后使用 2,3 进行安乐死和梗塞体积测量,5-三苯基氯化四唑 (TTC) 染色和图像分析。在一个单独的队列中,使用从注射后 10 天开始的运动功能、运动活动、认知、焦虑和抑郁样行为的标准测试来评估行为,然后对梗死进行量化。我们发现 ET-1 诱导的 MCA 闭塞在所有三种菌株中产生了显着的梗塞。中风动物的运动功能略有受损,但劳损和中风手术对行为结果没有明显的交互作用。我们得出结论,与对照组相比,在 ET-1 诱导的局灶性缺血性中风后,FSL 大鼠对脑损伤或行为缺陷的易感性没有增加。在注射后 10 天开始出现焦虑和抑郁样行为,然后进行梗死量化。我们发现 ET-1 诱导的 MCA 闭塞在所有三种菌株中产生了显着的梗塞。中风动物的运动功能略有受损,但劳损和中风手术对行为结果没有明显的交互作用。我们得出结论,与对照组相比,在 ET-1 诱导的局灶性缺血性中风后,FSL 大鼠对脑损伤或行为缺陷的易感性没有增加。在注射后 10 天开始出现焦虑和抑郁样行为,然后进行梗死量化。我们发现 ET-1 诱导的 MCA 闭塞在所有三种菌株中产生了显着的梗塞。中风动物的运动功能略有受损,但劳损和中风手术对行为结果没有明显的交互作用。我们得出结论,与对照组相比,在 ET-1 诱导的局灶性缺血性中风后,FSL 大鼠对脑损伤或行为缺陷的易感性没有增加。但劳损和中风手术对行为结果没有明显的交互作用。我们得出结论,与对照组相比,在 ET-1 诱导的局灶性缺血性中风后,FSL 大鼠对脑损伤或行为缺陷的易感性没有增加。但劳损和中风手术对行为结果没有明显的交互作用。我们得出结论,与对照组相比,在 ET-1 诱导的局灶性缺血性中风后,FSL 大鼠对脑损伤或行为缺陷的易感性没有增加。

更新日期:2021-09-10
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