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- W1903215554 abstract "Stress has been considered determinant in the etiology of depression. The adrenal medulla plays a key role in response to stress by releasing catecholamines, which are important to maintain homeostasis. We aimed to study the adrenal medulla in a mouse model of depression induced by 21 days of unpredictable chronic stress (UCS). We observed that UCS induced a differential and time-dependent change in adrenal medulla. After 7 days of UCS, mice did not show depressive-like behavior, but the adrenal medullae show increased protein and/or mRNA levels of catecholamine biosynthetic enzymes (TH, DβH and PNMT), Neuropeptide Y, the SNARE protein SNAP-25, the catecholamine transporter VMAT2 and the chromaffin progenitor cell markers, Mash1 and Phox2b. Moreover, 7 days of UCS induced a decrease in the chromaffin progenitor cell markers, Sox9 and Notch1. This suggests an increased capacity of chromaffin cells to synthesize, store and release catecholamines. In agreement, after 7 days, UCS mice had higher NE and EP levels in adrenal medulla. Opposite, when mice were submitted to 21 days of UCS, and showed a depressive like behavior, adrenal medullae had lower protein and/or mRNA levels of catecholamine biosynthetic enzymes (TH, DβH, PNMT), catecholamine transporters (NET, VMAT1), SNARE proteins (synthaxin1A, SNAP25, VAMP2), catecholamine content (EP, NE), and lower EP serum levels, indicating a reduction in catecholamine synthesis, re-uptake, storage and release. In conclusion, this study suggests that mice exposed to UCS for a period of 21 days develop a depressive-like behavior accompanied by an impairment of adrenal medullary function." @default.
- W1903215554 created "2016-06-24" @default.
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- W1903215554 date "2015-10-01" @default.
- W1903215554 modified "2023-10-14" @default.
- W1903215554 title "Impaired adrenal medullary function in a mouse model of depression induced by unpredictable chronic stress" @default.
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- W1903215554 doi "https://doi.org/10.1016/j.euroneuro.2015.06.013" @default.
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