کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2201526 1551314 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Monitoring mouse serotonin transporter internalization in stem cell-derived serotonergic neurons by confocal laser scanning microscopy
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
Monitoring mouse serotonin transporter internalization in stem cell-derived serotonergic neurons by confocal laser scanning microscopy
چکیده انگلیسی

In the central nervous system serotonergic neurotransmission is terminated by the rapid removal of serotonin (5-hydroxytryptamine, 5HT) out of the extra-cellular space back into the presynaptic neuron. This task is fulfilled by a specific serotonin transporter (SERT) protein which controls the concentration of extra-cellular 5HT. Consequently, one mechanism to regulate the efficacy of serotonergic neurotransmission is via modulation of the density of SERT molecules on the cell membrane.In this regard it has been shown, that chronic activation of the p38 mitogen-activated protein kinase (p38 MAPK) leads to enhanced SERT surface expression whereas activation of protein kinase C (PKC) reduces SERT surface expression. In addition, it has been reported that exposure to selective serotonin re-uptake inhibitors (SSRIs) leads to a down-regulation of SERT expression in vivo and in vitro in different cellular systems. Here, we have studied interactions between kinase- and SSRI-induced SERT internalization in mouse stem cell-derived serotonergic neurons expressing the native SERT allele in its natural surroundings. Therefore we established a method to quantify the amount of cell surface-expressed SERT molecules on individual cells by antibody detection combined with confocal laser scanning microscopy.Using this methodology we could show that activation of PKC, inhibition of the p38 MAPK as well as exposure to the SSRI citalopram each induced a significant reduction of cell surface-expressed SERT over time. Combinations of PKC activation, p38 MAPK inhibition and SSRI exposure led to a more pronounced down-regulation of SERT surface expression depending on the time of drug exposure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurochemistry International - Volume 54, Issues 3–4, March–April 2009, Pages 271–276
نویسندگان
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