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자료유형
학술저널
저자정보
Juli Choi (이화여자대학교 뇌인지과학과) 김윤근 (주식회사 엠디헬스케어) 한평림 (이화여자대학교)
저널정보
한국뇌신경과학회 Experimental Neurobiology Experimental Neurobiology Vol.28 No.2
발행연도
2019.1
수록면
158 - 171 (14page)

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Gut microbiota play a role in regulating mental disorders, but the mechanism by which gut microbiota regulate brain function remains unclear. Gram negative and positive gut bacteria release membrane-derived extracellular vesicles (EVs), which function in microbiota-host intercellular communication. In the present study, we investigated whether Lactobacillus plantarum derived EVs (L -EVs) could have a role in regulating neuronal function and stress-induced depressive-like behaviors. HT22 cells treated with the stress hormone glucocorticoid (GC; corticosterone) had reduced expression of Bdnf and Sirt1 , whereas L -EV treatment reversed GC-induced decreased expression of Bdnf and Sirt1 . The siRNA-mediated knockdown of Sirt1 in HT22 cells decreased Bdnf4 , a splicing variant of Bdnf , and Creb expression, suggesting that Sirt1 plays a role in L -EV-induced increase of BDNF and CREB expression. Mice exposed to restraint for 2-h daily for 14 days (CRST) exhibited depressive-like behaviors, and these CRST-treated mice had reduced expression of Bdnf and Nt4/5 in the hippocampus. In contrast, L -EV injection prior to each restraint treatment blocked the reduced expression of Bdnf and Nt4/5 , and stress-induced depressive-like behaviors. Furthermore, L -EV treatment in CRST-treated mice also rescued the reduced expression of Bdnf , and blocked stress-induced depressive-like behaviors. These results suggest that Lactobacillus derived EVs can change the expression of neurotropic factors in the hippocampus and afford antidepressant- like effects in mice with stress-induced depression.

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