Serotonin receptor HTR6-mediated mTORC1 signaling regulates dietary restriction-induced memory enhancement.

Autor: Ling-Ling Teng, Guan-Ling Lu, Lih-Chu Chiou, Wei-Sheng Lin, Ya-Yun Cheng, Tai-En Hsueh, Yi-Ching Huang, Nai-Hsuan Hwang, Jin-Wei Yeh, Ruey-Ming Liao, Shou-Zen Fan, Jui-Hung Yen, Tsai-Feng Fu, Ting-Fen Tsai, Ming-Shiang Wu, Pei-Yu Wang
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: PLoS Biology, Vol 17, Iss 3, p e2007097 (2019)
Druh dokumentu: article
ISSN: 1544-9173
1545-7885
DOI: 10.1371/journal.pbio.2007097
Popis: Dietary restriction (DR; sometimes called calorie restriction) has profound beneficial effects on physiological, psychological, and behavioral outcomes in animals and in humans. We have explored the molecular mechanism of DR-induced memory enhancement and demonstrate that dietary tryptophan-a precursor amino acid for serotonin biosynthesis in the brain-and serotonin receptor 5-hydroxytryptamine receptor 6 (HTR6) are crucial in mediating this process. We show that HTR6 inactivation diminishes DR-induced neurological alterations, including reduced dendritic complexity, increased spine density, and enhanced long-term potentiation (LTP) in hippocampal neurons. Moreover, we find that HTR6-mediated mechanistic target of rapamycin complex 1 (mTORC1) signaling is involved in DR-induced memory improvement. Our results suggest that the HTR6-mediated mTORC1 pathway may function as a nutrient sensor in hippocampal neurons to couple memory performance to dietary intake.
Databáze: Directory of Open Access Journals
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