Fluoxetine increases the expression of NCAM140 and pCREB in rat C6 glioma cells.

Abstract:

OBJECTIVE:Dysfunction of neural plasticity in the brain is known to alter neural networks, resulting in depression. To understand how fluoxetine regulates molecules involved in neural plasticity, the expression levels of NCAM, NCAM140, CREB and pCREB, in rat C6 glioma cells after fluoxetine treatment were examined. METHODS:C6 cells were cultured after 20 min or after 6, 24 or 72 h treatments with 10 µM fluoxetine. Immunocytochemistry was used to determine the effect of fluoxetine on the expression of NCAM. Western blot analysis was used to measure the expression levels of NCAM140 and CREB and the induction of pCREB after fluoxetine treatment. RESULTS:NCAM expression following 72-h fluoxetine treatment was significantly increased around cell membranes compared to control cells. Cells treated with fluoxetine for 6 and 72 h showed a significant increase in NCAM140 expression compared to cells treated for 20 min. The level of pCREB in the cells treated with fluoxetine for 72 h not only increased more than 60%, but was also significantly different when compared with the other treatment times. The 72-h fluoxetine treatment led to the increase of NCAM140 and the phosphorylation of CREB in C6 cells. CONCLUSION:Our findings indicate that fluoxetine treatment regulates neuronal plasticity and neurite outgrowth by phosphorylating and activating CREB via the NCAM140 homophilic interaction-induced activation of the Ras-MAPK pathway.

journal_name

Psychiatry Investig

journal_title

Psychiatry investigation

authors

Choi MR,Oh DH,Kim SH,Jung KH,Das ND,Chai YG

doi

10.4306/pi.2012.9.2.180

subject

Has Abstract

pub_date

2012-06-01 00:00:00

pages

180-6

issue

2

eissn

1738-3684

issn

1976-3026

journal_volume

9

pub_type

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