Hormonal Control of Rat Adrenal Phenylethanolamine N-Methyltransferase
نویسندگان
چکیده
منابع مشابه
Glucocorticoid responsiveness of the rat phenylethanolamine N-methyltransferase gene.
Two newly identified, overlapping (1 bp) glucocorticoid response elements (GREs) at -759 and -773 bp in the promoter of the rat phenylethanolamine N-methyltransferase (PNMT; EC 2.1.1.28) gene are primarily responsible for its glucocorticoid sensitivity, rather than the originally identified -533-bp GRE. A dose-dependent increase in PNMT promoter activity was observed in RS1 cells transfected wi...
متن کاملGlucocorticoid hypertension and nonadrenal phenylethanolamine N-methyltransferase.
Several drugs that block epinephrine synthesis by inhibiting phenylethanolamine N-methyltransferase (PNMT) lower blood pressure in hypertensive rats. We investigated the mechanism by which these drugs lower blood pressure in rats made hypertensive with the glucocorticoid dexamethasone. We performed adrenalectomy or sham operation on several rats and then gave them either dexamethasone chronical...
متن کاملRegulation of the rat phenylethanolamine N-methyltransferase gene by transcription factors Sp1 and MAZ.
The rat phenylethanolamine N-methyltransferase (PNMT) gene promoter contains 1-base pair (bp) overlapping consensus sequences for Sp1 and MAZ transcription factors at -48 and -38 bp, respectively. Gel mobility assays using PC-12-derived RS1 cell nuclear extracts or in vitro translated proteins showed that Sp1 and MAZ specifically bind to these elements, that MAZ displaces/prevents Sp1 binding, ...
متن کاملDeficiency of Phenylethanolamine N-Methyltransferase in Norepinephrine-Producing Pheochromocytoma.
Pheochromocytoma is a catecholamine (CA)-producing tumor that is classified into two types: the norepinephrine (NE) and the mixed NE and epinephrine type (E-type) from plasma CA levels. Phenylethanolamine N-methyltransferase (PNMT) is the terminal enzyme in CA synthesis; it catalyzes the synthesis of E from NE. It is not known whether the absence of immunoreactive PNMT is paralleled by a lack o...
متن کاملCentral elevation of phenylethanolamine N-methyltransferase activity following stress.
Phenylethanolamine N-methyltransferase (PNMT, E.C.2.1.1.28) is the terminal enzyme in the synthesis of adrenaline ill the adrenal medulla 1, other chromaffin tissues, and in the mammalian brain iv. Changes in the level of adrenal and hypothalamic PNM T activity have been correlated with changes in the tissue content of adrenaline 13,15,1s,2°. It is well established that PNMT requires glucocorti...
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ژورنال
عنوان ژورنال: Neuropsychopharmacology
سال: 1995
ISSN: 0893-133X
DOI: 10.1038/sj.npp.1380286