کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5509203 | 1538507 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Oxytocin (OXT)-stimulated inhibition of Kir7.1 activity is through PIP2-dependent Ca2Â + response of the oxytocin receptor in the retinal pigment epithelium in vitro
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
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چکیده انگلیسی
Oxytocin (OXT) is a neuropeptide that activates the oxytocin receptor (OXTR), a rhodopsin family G-protein coupled receptor. Our localization of OXTR to the retinal pigment epithelium (RPE), in close proximity to OXT in the adjacent photoreceptor neurons, leads us to propose that OXT plays an important role in RPE-retinal communication. An increase of RPE [Ca2Â +]i in response to OXT stimulation implies that the RPE may utilize oxytocinergic signaling as a mechanism by which it accomplishes some of its many roles. In this study, we used an established human RPE cell line, a HEK293 heterologous OXTR expression system, and pharmacological inhibitors of Ca2Â + signaling to demonstrate that OXTR utilizes capacitative Ca2Â + entry (CCE) mechanisms to sustain an increase in cytoplasmic Ca2Â +. These findings demonstrate how multiple functional outcomes of OXT-OXTR signaling could be integrated via a single pathway. In addition, the activated OXTR was able to inhibit the Kir7.1 channel, an important mediator of sub retinal waste transport and K+ homeostasis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cellular Signalling - Volume 37, September 2017, Pages 93-102
Journal: Cellular Signalling - Volume 37, September 2017, Pages 93-102
نویسندگان
Nathaniel York, Patrick Halbach, Michelle A. Chiu, Ian M. Bird, De-Ann M. Pillers, Bikash R. Pattnaik,