Xiao-Yi Hou1, Zhuang-Li Hu1,2,3,4, Deng-Zheng Zhang1, Wei Lu1, Jun Zhou1, Peng-Fei Wu1,2,3,4, Xin-Lei Guan1, Qian-Qian Han1, Si-Long Deng1, Hai Zhang1,4,5, Jian-Guo Chen1,2,3,4,5, Fang Wang1,2,3,4,5. 1. 1 Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, China . 2. 2 Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation (Huazhong University of Science and Technology) , Wuhan, China . 3. 3 Laboratory of Neuropsychiatric Diseases, The Institute of Brain Research, Huazhong University of Science and Technology , Wuhan, China . 4. 4 Key Laboratory of Neurological Diseases (HUST), Ministry of Education of China , Wuhan, China . 5. 5 Collaborative Innovation Center for Brain Science , Wuhan, China .
Abstract
AIMS: We asked whether hydrogen sulfide (H2S), as the third gaseous mediator, provided fast antidepressant effect on major depressive disorders and underlying mechanisms. RESULTS: The decreased level of H2S was detected in the hippocampus of chronic unpredictable mild stress (CUMS)-treated rats. Acute administration of H2S either by H2S inhalation or by the donor NaHS produced a rapid antidepressant-like behavioral effect. Further investigation demonstrated that this effect of H2S was mediated by reversing the CUMS-induced decrease in dendritic spine density and required the activation of mammalian target of rapamycin (mTOR)C1 and neurotrophic TrkB receptors, which proceeded to increase synaptic protein expression, including postsynaptic density protein 95, synaptophysin, and α-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid receptor GluR1/2 subunit. INNOVATION: This study provides the first direct evidence for detecting the decreased H2S in hippocampus of CUMS rats and the biological significance of H2S in treating major depression. CONCLUSION: Our data demonstrate that H2S activates mTORC1 signaling cascades and thereby produces fast-onset antidepressant effect. The study provides a profound insight into H2S or its donors as potent preventive and therapeutic agents for intervention of depression. Antioxid. Redox Signal. 27, 472-488.
AIMS: We asked whether hydrogen sulfide (H2S), as the third gaseous mediator, provided fast antidepressant effect on major depressive disorders and underlying mechanisms. RESULTS: The decreased level of H2S was detected in the hippocampus of chronic unpredictable mild stress (CUMS)-treated rats. Acute administration of H2S either by H2S inhalation or by the donorNaHS produced a rapid antidepressant-like behavioral effect. Further investigation demonstrated that this effect of H2S was mediated by reversing the CUMS-induced decrease in dendritic spine density and required the activation of mammalian target of rapamycin (mTOR)C1 and neurotrophic TrkB receptors, which proceeded to increase synaptic protein expression, including postsynaptic density protein 95, synaptophysin, and α-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid receptor GluR1/2 subunit. INNOVATION: This study provides the first direct evidence for detecting the decreased H2S in hippocampus of CUMSrats and the biological significance of H2S in treating major depression. CONCLUSION: Our data demonstrate that H2S activates mTORC1 signaling cascades and thereby produces fast-onset antidepressant effect. The study provides a profound insight into H2S or its donors as potent preventive and therapeutic agents for intervention of depression. Antioxid. Redox Signal. 27, 472-488.