Astrocyte-derived ATP modulates depressive-like behaviors - PubMed (original) (raw)
doi: 10.1038/nm.3162. Epub 2013 May 5.
Liang-Ping Li, Qian Wang, Qiong Wu, Hong-Hai Hu, Meng Zhang, Ying-Ying Fang, Jie Zhang, Shu-Ji Li, Wen-Chao Xiong, Hua-Cheng Yan, Yu-Bo Gao, Ji-Hong Liu, Xiao-Wen Li, Li-Rong Sun, Yuan-Ning Zeng, Xin-Hong Zhu, Tian-Ming Gao
Affiliations
- PMID: 23644515
- DOI: 10.1038/nm.3162
Astrocyte-derived ATP modulates depressive-like behaviors
Xiong Cao et al. Nat Med. 2013 Jun.
Abstract
Major depressive disorder (MDD) is a cause of disability that affects approximately 16% of the world's population; however, little is known regarding the underlying biology of this disorder. Animal studies, postmortem brain analyses and imaging studies of patients with depression have implicated glial dysfunction in MDD pathophysiology. However, the molecular mechanisms through which astrocytes modulate depressive behaviors are largely uncharacterized. Here, we identified ATP as a key factor involved in astrocytic modulation of depressive-like behavior in adult mice. We observed low ATP abundance in the brains of mice that were susceptible to chronic social defeat. Furthermore, we found that the administration of ATP induced a rapid antidepressant-like effect in these mice. Both a lack of inositol 1,4,5-trisphosphate receptor type 2 and transgenic blockage of vesicular gliotransmission induced deficiencies in astrocytic ATP release, causing depressive-like behaviors that could be rescued via the administration of ATP. Using transgenic mice that express a Gq G protein-coupled receptor only in astrocytes to enable selective activation of astrocytic Ca(2+) signaling, we found that stimulating endogenous ATP release from astrocytes induced antidepressant-like effects in mouse models of depression. Moreover, we found that P2X2 receptors in the medial prefrontal cortex mediated the antidepressant-like effects of ATP. These results highlight astrocytic ATP release as a biological mechanism of MDD.
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