Time-dependent inactivation of human phenylethanolamine N-methyltransferase by 7-isothiocyanatotetrahydroisoquinoline
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چکیده
منابع مشابه
Glucocorticoid 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 کاملGlucocorticoid 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 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...
متن کاملPhenylethanolamine N-methyltransferase downregulation is associated with malignant pheochromocytoma/paraganglioma
Malignant pheochromocytoma/paraganglioma (PCC/PGL) is defined by the presence of metastases at non-chromaffin sites, which makes it difficult to prospectively diagnose malignancy. Here, we performed array CGH (aCGH) and paired gene expression profiling of fresh, frozen PCC/PGL samples (n = 12), including three malignant tumors, to identify genes that distinguish benign from malignant tumors. Mo...
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ژورنال
عنوان ژورنال: Bioorganic & Medicinal Chemistry Letters
سال: 2009
ISSN: 0960-894X
DOI: 10.1016/j.bmcl.2009.01.014