کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6279825 | 1615083 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Developmental expression of Kv1 voltage-gated potassium channels in the avian hypothalamus
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کلمات کلیدی
Kv1VMHE12aCSFOPTelec - الکتروelectrode - الکترودthird ventricle - بطن سومoptic tract - دستگاه نوریDevelopment - رشدArc - قوسartificial cerebrospinal fluid - مایع مغزی نخاعی مصنوعیmedian eminence - مدرنیتهarcuate nucleus - هسته قوسEnergy homeostasis - هومئوستاز انرژیHypothalamus - هیپوتالاموسVentromedial hypothalamus - هیپوتالاموس ونتومدیالPotassium channel - کانال پتاسیم
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب (عمومی)
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چکیده انگلیسی
Specialized hypothalamic neurons integrate the homeostatic balance between food intake and energy expenditure, processes that may become dysregulated during the development of diabetes, obesity, and other metabolic disorders. Shaker family voltage-gated potassium channels (Kv1) contribute to the maintenance of resting membrane potential, action potential characteristics, and neurotransmitter release in many populations of neurons, although hypothalamic Kv1 channel expression has been largely unexplored. Whole-cell patch clamp recordings from avian hypothalamic brain slices demonstrate a developmental shift in the electrophysiological properties of avian arcuate nucleus neurons, identifying an increase in outward ionic current that corresponds with action potential maturation. Additionally, RT-PCR experiments identified the early expression of Kv1.2, Kv1.3, and Kv1.5 mRNA in the embryonic avian hypothalamus, suggesting that these channels may underlie the electrophysiological changes observed in these neurons. Real-time quantitative PCR analysis on intact microdissections of embryonic hypothalamic tissue revealed a concomitant increase in Kv1.2 and Kv1.5 gene expression at key electrophysiological time points during development. This study is the first to demonstrate hypothalamic mRNA expression of Kv1 channels in developing avian embryos and may suggest a role for voltage-gated ion channel regulation in the physiological patterning of embryonic hypothalamic circuits governing energy homeostasis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 616, 11 March 2016, Pages 182-188
Journal: Neuroscience Letters - Volume 616, 11 March 2016, Pages 182-188
نویسندگان
Megan A. Doczi, Carl M. Vitzthum, Cynthia J. Forehand,