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Diacylglycerol lipase alpha in astrocytes is involved in maternal care and affective behaviors.
Glia ( IF 5.4 ) Pub Date : 2020-09-02 , DOI: 10.1002/glia.23903
Lena-Louise Schuele 1 , Sandra Glasmacher 2 , Jürg Gertsch 2 , Marie Denise Roggan 1 , Janis-Lisa Transfeld 1 , Laura Bindila 3 , Beat Lutz 3 , Carl-Christian Kolbe 4 , Andras Bilkei-Gorzo 1 , Andreas Zimmer 1 , Este Leidmaa 1
Affiliation  

Genetic deletion of cannabinoid CB1 receptors or diacylglycerol lipase alpha (DAGLa), the main enzyme involved in the synthesis of the endocannabinoid (eCB) 2‐arachidonoylglycerol (2‐AG), produced profound phenotypes in animal models of depression‐related behaviors. Furthermore, clinical studies have shown that antagonists of CB1 can increase the incidence and severity of major depressive episodes. However, the underlying pathomechanisms are largely unknown. In this study, we have focused on the possible involvement of astrocytes. Using the highly sensitive RNAscope technology, we show for the first time that a subpopulation of astrocytes in the adult mouse brain expresses Dagla, albeit at low levels. Targeted lipidomics revealed that astrocytic DAGLa only accounts for a minor percentage of the steady‐state brain 2‐AG levels and other arachidonic acid derived lipids like prostaglandins. Nevertheless, the deletion of Dagla in adult mouse astrocytes had profound behavioral consequences with significantly increased depressive‐like behavioral responses and striking effects on maternal behavior, corresponding with increased levels of serum progesterone and estradiol. Our findings therefore indicate that lipids from the DAGLa metabolic axis in astrocytes play a key regulatory role in affective behaviors.

中文翻译:

星形胶质细胞中的二酰基甘油脂肪酶 α 与母体护理和情感行为有关。

大麻素 CB1 受体或二酰基甘油脂肪酶 α (DAGLa) 的遗传缺失是参与内源性大麻素 (eCB) 2-花生四烯酰甘油 (2-AG) 合成的主要酶,在抑郁症相关行为的动物模型中产生了深刻的表型。此外,临床研究表明,CB1 拮抗剂可增加重度抑郁发作的发生率和严重程度。然而,潜在的病理机制在很大程度上是未知的。在这项研究中,我们专注于星形胶质细胞的可能参与。使用高度敏感的 RNAscope 技术,我们首次显示成年小鼠大脑中的星形胶质细胞亚群表达Dagla,尽管处于低水平。靶向脂质组学显示,星形胶质细胞 DAGLa 仅占稳态脑 2-AG 水平和其他花生四烯酸衍生脂质(如前列腺素)的一小部分。然而,成年小鼠星形胶质细胞中Dagla的缺失具有深远的行为后果,显着增加了抑郁样行为反应和对母体行为的显着影响,与血清黄体酮和雌二醇水平的增加相对应。因此,我们的研究结果表明,星形胶质细胞中 DAGLa 代谢轴的脂质在情感行为中起着关键的调节作用。
更新日期:2020-09-02
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