Abstract:
:The characteristics of histamine H1-receptors on astrocytes from the cerebral cortex of newborn rats in primary culture were analyzed with a [3H]mepyramine binding assay, and compared with those in the cerebral cortex. The apparent dissociation constant (KD) of [3H]mepyramine binding, the apparent inhibition constants (Ki) of various H1-ligands for [3H]mepyramine binding and the stereoselectivity of d- and l-chlorpheniramine for the inhibition of [3H]mepyramine binding to receptors on cultured astrocytes and to receptors in the brain tissue were very similar, indicating that these receptors are identical. The apparent density of H1-receptors (Bmax) on astrocytes was 262 +/- 60 fmol/mg protein, which was comparable to that in the brain tissue (194 +/- 24 fmol/mg protein). The development of H1-receptors on cultured astrocytes resembled the postnatal development of the receptors in the rat brain. These results suggest that astrocytes could be one of the main targets of the central histaminergic system.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Inagaki N,Fukui H,Taguchi Y,Wang NP,Yamatodani A,Wada Hdoi
10.1016/0014-2999(89)90007-1subject
Has Abstractpub_date
1989-11-28 00:00:00pages
43-51issue
1eissn
0014-2999issn
1879-0712pii
0014-2999(89)90007-1journal_volume
173pub_type
杂志文章abstract::We have recently demonstrated that hyperthermia induced by 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI) and m-chlorophenylpiperazine (m-CPP) are separately mediated by selective stimulation of 5-HT2A and 5-HT2C receptors, respectively in Wistar rats. Furthermore, hyperthermia induced by either DOI or m-CPP was ...
journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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abstract::The effect of somatostatin (SRIF) on VIP induction of SRIF secretion, cyclic AMP accumulation and 45Ca2+ influx was investigated in cultured diencephalic cells. [D-Trp8]SRIF suppressed VIP-stimulated SRIF release and decreased VIP-stimulated cyclic AMP accumulation in a dose-dependent manner. SRIF-14 blocked basal and...
journal_title:European journal of pharmacology
pub_type: 杂志文章
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更新日期:1989-02-28 00:00:00