دورية أكاديمية
Effects of organophosphates and nerve growth factor on muscarinic receptor binding number in rat pheochromocytoma PC12 cells.
| العنوان: | Effects of organophosphates and nerve growth factor on muscarinic receptor binding number in rat pheochromocytoma PC12 cells. |
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| المؤلفون: | Viana GB; Department of Pharmacology and Experimental Therapeutics, University of Maryland School of Medicine, Baltimore 21201., Davis LH, Kauffman FC |
| المصدر: | Toxicology and applied pharmacology [Toxicol Appl Pharmacol] 1988 Apr; Vol. 93 (2), pp. 257-66. |
| نوع المنشور: | Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
| اللغة: | English |
| بيانات الدورية: | Publisher: Academic Press Country of Publication: United States NLM ID: 0416575 Publication Model: Print Cited Medium: Print ISSN: 0041-008X (Print) Linking ISSN: 0041008X NLM ISO Abbreviation: Toxicol Appl Pharmacol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: New York, NY : Academic Press Original Publication: New York. |
| مواضيع طبية MeSH: | Nerve Growth Factors/*pharmacology , Organophosphorus Compounds/*pharmacology , Receptors, Muscarinic/*drug effects, Animals ; Atropine/pharmacology ; Cholinesterases/analysis ; Dose-Response Relationship, Drug ; N-Methylscopolamine ; Pheochromocytoma/metabolism ; Phosphorylation ; Physostigmine/pharmacology ; Rats ; Receptors, Muscarinic/analysis ; Scopolamine Derivatives/metabolism ; Soman/pharmacology ; Tumor Cells, Cultured/drug effects |
| مستخلص: | Muscarinic receptor binding in PC12 cells is influenced by both nerve growth factor (NGF) and organophosphates. Treatment of PC12 cells with a single dose of NGF (50 ng, 7S NGF/ml) increased [3H]N-methylscopolamine ([3H]-NMS) binding sites approximately two-fold at 48 hr but did not change the Kd for this ligand. Exposure of PC12 cells to soman, 50 microM, decreased [3H]-NMS binding in both undifferentiated and NGF-treated cells; however, decreases in muscarinic binding induced by the organophosphate were only minimal after the first hour after treatment and were maximal at about 24 hr. Other organophosphates including sarin, tabun, and VX as well as the carbamate, pyridostigmine, also reduced [3H]-NMS binding in PC12 cells measured 24-48 hr after treatment. The order of potency of organophosphates in lowering [3H]-NMS binding was soman greater than sarin greater than VX greater than tabun greater than DFP. High amounts of VX (200 microM) but not the other organophosphates inhibited [3H]-NMS binding when added to cells during the course of binding assays. Decreases in muscarinic receptor binding induced by the organophosphates differed markedly from that produced by carbamylcholine, which decreased [3H]-NMS binding maximally 30 min after addition to the cells. Decreases in [3H]-NMS binding produced by carbamylcholine were antagonized by atropine, but reductions in muscarinic binding produced by the organophosphates were not reversed by atropine. Thus, decreases in muscarinic receptor binding induced in PC12 cells by organophosphates occur via a novel mechanism that does not involve agonist-induced receptor desensitization. |
| معلومات مُعتمدة: | HD-16596 United States HD NICHD NIH HHS |
| المشرفين على المادة: | 0 (Nerve Growth Factors) 0 (Organophosphorus Compounds) 0 (Receptors, Muscarinic) 0 (Scopolamine Derivatives) 7C0697DR9I (Atropine) 96-64-0 (Soman) 9U1VM840SP (Physostigmine) EC 3.1.1.8 (Cholinesterases) VDR09VTQ8U (N-Methylscopolamine) |
| تواريخ الأحداث: | Date Created: 19880401 Date Completed: 19880516 Latest Revision: 20190727 |
| رمز التحديث: | 20240627 |
| DOI: | 10.1016/0041-008x(88)90125-1 |
| PMID: | 3358262 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 0041-008X |
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| DOI: | 10.1016/0041-008x(88)90125-1 |