کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9414748 1292057 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-affinity neurotensin receptor is involved in phosphoinositide hydrolysis stimulation by carbachol in neonatal rat brain
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب تکاملی
پیش نمایش صفحه اول مقاله
High-affinity neurotensin receptor is involved in phosphoinositide hydrolysis stimulation by carbachol in neonatal rat brain
چکیده انگلیسی
Ontogenetic studies indicate that inositol phosphate accumulation in rodent brain tissue by cholinergic muscarinic agonists as well as expression of high-affinity neurotensin receptor (NTS1) peak at 7 days after birth. Herein, potential participation of this receptor in such effect was investigated. Cerebral cortex prisms of 7-day-old rats were preloaded with [3H]myoinositol and later incubated during 60 or 20 min in the presence of muscarinic agonist carbachol plus neurotensin and SR 48692, a non-peptide NTS1 antagonist. In 60-min incubation experiments, inositol phosphate accumulation by 10−3 M carbachol was roughly 320%, an effect which remained unaltered plus 10−6 M to 10−4 M neurotensin but partially decreased with equimolar SR 48692 concentration. In 20-min incubation experiments, inositol phosphate accumulation by 10−3 M carbachol was circa 240%, a value which attained 320-360% plus 10−7 M neurotensin; this effect was totally blocked by 10−7 M SR 48692. It was concluded that in inositol phosphate accumulation by carbachol, besides the cholinergic muscarinic receptor, the NTS1 receptor is likewise involved; findings at 60 min are attributable to the effect of endogenous neurotensin whereas those at 20 min most likely involve both endogenous and exogenously added peptide.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Developmental Brain Research - Volume 154, Issue 2, 8 February 2005, Pages 247-254
نویسندگان
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