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Hemisphere-dependent endocannabinoid system activity in prefrontal cortex and hippocampus of the Flinders Sensitive Line rodent model of depression.
Neurochemistry international ( IF 4.2 ) Pub Date : 2019-02-01 , DOI: 10.1016/j.neuint.2019.01.023
C Kirkedal 1 , B Elfving 1 , H K Müller 1 , F A Moreira 2 , L Bindila 3 , B Lutz 4 , G Wegener 1 , N Liebenberg 1
Affiliation  

Altered endocannabinoid (eCB) signalling is suggested as an important contributor to the pathophysiology of depression. To further elucidate this, we conducted a study using a genetic rat model of depression, the Flinders Sensitive Line (FSL), and their controls, the Flinders Resistant Line (FRL) rats. Plasma, right and left prefrontal cortex, and hippocampus were isolated from FSL and FRL rats. We analyzed each region for the eCB anandamide (AEA) and 2-arachidonoylglycerol (2-AG) levels by liquid chromatography/multiple reaction monitoring (LC/MRM), mRNA and protein levels of the cannabinoid type 1 receptor (CB1R), fatty acid amide hydrolase (FAAH) and monoacyl glycerol lipase (MAGL) by real time qPCR and Western blotting. Content of 2-AG was lower in the left side of the hippocampus and prefrontal cortex in FSL rats compared to FRL rats. Inversely, levels of AEA were higher in right hippocampus than in left hippocampus. In plasma, AEA levels were increased and 2-AG decreased. Cannabinoid receptor 1 (Cnr1), Faah and Magl mRNA levels were prominently decreased in right prefrontal cortex of FSL rats as compared to FRL rats. Protein expression of CB1R and FAAH were decreased in left hippocampus. In summary, our data suggest a decreased eCB signalling in the FSL rats, which could contribute to the depressive-like behaviour. Interestingly, the altered eCB system activity appear to be hemisphere-specific in the limbic regions. Our study support the existing literature and showed altered eCB system activity in this particular animal model of depression.

中文翻译:

弗林德斯敏感线啮齿动物抑郁模型的前额叶皮层和海马中半球依赖的内源性大麻素系统活性。

改变的内源性大麻素(eCB)信号被认为是抑郁症病理生理的重要贡献者。为了进一步阐明这一点,我们使用抑郁症的遗传大鼠模型,弗林德斯敏感线(FSL)及其对照,弗林德斯抵抗线(FRL)大鼠进行了研究。从FSL和FRL大鼠中分离血浆,左右前额叶皮层和海马体。我们通过液相色谱/多反应监测(LC / MRM),大麻素1型受体(CB1R),脂肪酸的mRNA和蛋白质水平分析了每个区域的eCB花生四烯酸(AEA)和2-花生四烯酸甘油酯(2-AG)水平实时定量PCR和Western印迹检测酰胺水解酶(FAAH)和单酰基甘油脂酶(MAGL)。与FRL大鼠相比,FSL大鼠海马和前额叶皮层的2-AG含量较低。相反,右海马区的AEA水平高于左海马区。在血浆中,AEA水平升高而2-AG降低。与FRL大鼠相比,FSL大鼠右前额叶皮质中的大麻素受体1(Cnr1),Faah和Magl mRNA水平显着降低。左海马中CB1R和FAAH的蛋白表达降低。总而言之,我们的数据表明FSL大鼠中eCB信号的减少,这可能有助于抑郁样行为。有趣的是,改变的eCB系统活性在边缘区域似乎是半球特异性的。我们的研究支持现有文献,并显示在这种特定的抑郁症动物模型中eCB系统活性发生了改变。与FRL大鼠相比,FSL大鼠右前额叶皮质中的大麻素受体1(Cnr1),Faah和Magl mRNA水平显着降低。左海马中CB1R和FAAH的蛋白表达降低。总而言之,我们的数据表明FSL大鼠中eCB信号的减少,这可能有助于抑郁样行为。有趣的是,改变的eCB系统活性在边缘区域似乎是半球特异性的。我们的研究支持现有文献,并显示在这种特定的抑郁症动物模型中eCB系统活性发生了改变。与FRL大鼠相比,FSL大鼠右前额叶皮质中的大麻素受体1(Cnr1),Faah和Magl mRNA水平显着降低。左海马中CB1R和FAAH的蛋白表达降低。总而言之,我们的数据表明FSL大鼠中eCB信号的减少,这可能有助于抑郁样行为。有趣的是,改变的eCB系统活性在边缘区域似乎是半球特异性的。我们的研究支持现有文献,并显示在这种特定的抑郁症动物模型中eCB系统活性发生了改变。我们的数据表明,FSL大鼠中eCB信号的减少,这可能有助于产生抑郁样行为。有趣的是,改变的eCB系统活性在边缘区域似乎是半球特异性的。我们的研究支持现有文献,并显示在这种特定的抑郁症动物模型中eCB系统活性发生了改变。我们的数据表明,FSL大鼠中eCB信号的减少,这可能有助于产生抑郁样行为。有趣的是,改变的eCB系统活性在边缘区域似乎是半球特异性的。我们的研究支持现有文献,并显示在这种特定的抑郁症动物模型中eCB系统活性发生了改变。
更新日期:2019-02-01
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