کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6029832 | 1580930 | 2013 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Functional MRI to assess alterations of functional networks in response to pharmacological or genetic manipulations of the serotonergic system in mice
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب شناختی
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چکیده انگلیسی
Imaging methods that enable the investigation of functional networks both in human and animal brain provide important insights into mechanisms underlying pathologies including psychiatric disorders. Since the serotonergic receptor 1A (5-HT1A-R) has been strongly implicated in the pathophysiology of depressive and anxiety disorders, as well as in the action of antidepressant drugs, we investigated brain connectivity related to the 5-HT1A-R system by use of pharmacological functional magnetic resonance imaging in mice. We characterized functional connectivity elicited by activation of 5-HT1A-R and investigated how pharmacological and genetic manipulations of its function may modulate the evoked connectivity. Functional connectivity elicited by administration of the 5-HT1A-R agonist 8-OH-DPAT can be described by networks characterized by small-world attributes with nodes displaying highly concerted response patterns. Circuits identified comprised the brain structures known to be involved in stress-related disorders (e.g. prefrontal cortex, amygdala and hippocampus). The results also highlight the dorsomedial thalamus, a structure associated with fear processing, as a hub of the 5-HT1A-R functional network. Administration of a specific 5-HT1A-R antagonist or use of heterozygous 5-HT1A-R knockout mice significantly reduced functional connectivity elicited by 8-OH-DPAT. Whole brain functional connectivity analysis constitutes an attractive tool to characterize impairments in neurotransmission and the efficacy of pharmacological treatment in a comprehensive manner.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage - Volume 74, 1 July 2013, Pages 326-336
Journal: NeuroImage - Volume 74, 1 July 2013, Pages 326-336
نویسندگان
Florence Razoux, Christof Baltes, Thomas Mueggler, Aline Seuwen, Holger Russig, Isabelle Mansuy, Markus Rudin,