کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5594072 | 1571284 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Role of cystathionine-γ-lyase in hypoxia-induced changes in TASK activity, intracellular [Ca2+] and ventilation in mice
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
فیزیولوژی
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چکیده انگلیسی
Cystathionine-γ-lyase (CSE) is a multifunctional enzyme, and hydrogen sulfide (H2S) is one of its products. CSE and H2S have recently been proposed to be critical signaling molecules in hypoxia-induced excitation of carotid body (CB) glomus cells and the chemosensory response. Because the role of H2S in arterial chemoreception is still debated, we further examined the role of CSE by studying the effects of hypoxia on TASK K+ channel activity, cell depolarization, [Ca2+]i and ventilation using CSE+/+ and CSEâ/â mice. As predicted, hypoxia reduced TASK activity and depolarized glomus cells isolated from CSE+/+ mice. These effects of hypoxia were not significantly altered in glomus cells from CSEâ/â mice. Basal [Ca2+]i and hypoxia-induced elevation of [Ca2+] were also not significantly different in glomus cells from CSE+/+ and CSEâ/â mice. In whole-body plethysmography, hypoxia (10%O2) increased minute ventilation in both CSE+/+ and CSEâ/â mice equally well, and no significant differences were found in either males or females when adjusted by body weight. Together, these results show that deletion of the CSE gene has no effects on hypoxia-induced changes in TASK, cell depolarization, [Ca2+]i and ventilation, and therefore do not support the idea that CSE/H2S signaling is important for CB chemoreceptor activity in mice.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Respiratory Physiology & Neurobiology - Volume 246, December 2017, Pages 98-106
Journal: Respiratory Physiology & Neurobiology - Volume 246, December 2017, Pages 98-106
نویسندگان
Jiaju Wang, James O Hogan, Rui Wang, Carl White, Donghee Kim,