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Studies on ion channel antagonist-binding sites in sunflower protoplasts
The cytological location of ion channel antagonist-binding sites was studied in sunflower protoplasts using the fluorescent probes DM–Bodipy–PAA and DM–Bodipy–DHP. The binding specificity of the probes was established by competition experiments with Bepridil, phenylalkylamine (Verapamil) and dihydro...
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| Published in: | FEBS letters 1997-07, Vol.411 (1), p.115-118 |
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| Main Authors: | , , , , , |
| Format: | Article |
| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c5083-a180014e24342b2e20719600085d3971e981d59de2bffc5d413875d8bd5080fd3 |
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| cites | cdi_FETCH-LOGICAL-c5083-a180014e24342b2e20719600085d3971e981d59de2bffc5d413875d8bd5080fd3 |
| container_end_page | 118 |
| container_issue | 1 |
| container_start_page | 115 |
| container_title | FEBS letters |
| container_volume | 411 |
| creator | Vallée, N. Brière, C. Petitprez, M. Barthou, H. Souvré, A. Alibert, G. |
| description | The cytological location of ion channel antagonist-binding sites was studied in sunflower protoplasts using the fluorescent probes DM–Bodipy–PAA and DM–Bodipy–DHP. The binding specificity of the probes was established by competition experiments with Bepridil, phenylalkylamine (Verapamil) and dihydropyridine (Nifedipine) which are known as calcium and potassium channel antagonists. Quantitative image analysis of the fluorescence emitted by the protoplasts showed the existence of interactions between PAA- and DHP-binding sites. Moreover, studies on the cytolocalization of the PAA receptors by confocal imaging showed that in freshly isolated protoplasts, DM–Bodipy–PAA binds exclusively at sites located in the cortical region of the cell. |
| doi_str_mv | 10.1016/S0014-5793(97)00675-3 |
| format | article |
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| fulltext | fulltext |
| identifier | ISSN: 0014-5793 |
| ispartof | FEBS letters, 1997-07, Vol.411 (1), p.115-118 |
| issn | 0014-5793 1873-3468 |
| language | eng |
| recordid | cdi_hal_primary_oai_HAL_hal_02684890v1 |
| source | Wiley; ScienceDirect Journals |
| subjects | Binding Sites Boron Compounds Calcium Channel Blockers - metabolism Cellular Biology Dihydropyridine Dimethyl Sulfoxide Fluorescent Dyes - metabolism Helianthus - metabolism Ion channel Ion Channels - antagonists & inhibitors Life Sciences Microscopy, Confocal Microscopy, Fluorescence Nifedipine - metabolism Phenylalkylamine Protoplasts Spectrometry, Fluorescence Sunflower protoplast Verapamil - metabolism |
| title | Studies on ion channel antagonist-binding sites in sunflower protoplasts |
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