Chemically activated channels in muscle and spinal cord

✍ Scribed by Dr Meyer B. Jackson

• Book ID: 102707190
• Publisher: John Wiley and Sons
• Year: 1984
• Tongue: English
• Weight: 633 KB
• Volume: 16
• Category: Article
• ISSN: 0364-5134
• DOI: 10.1002/ana.410160709

✦ Synopsis

The patch clamp can be used to record single chemically activated channel currents in a variety of cell culture preparations. In the case of the y-aminobutyric acid (GABA) response in spinal cord cell culture, the channel i s C1-selective. C1-can be made to flow into or out of a cell by changing the direction of the electrochemical driving force for C1-; as a result, positive or negative channel currents are produced. Channel currents generated by GABA and the GABA agonists muscimol and pentobarbital have the same amplitude.

The kinetics of channel gating are studied by analyzing distributions of dwell times in conducting and nonconducting states. Such analyses of the GABA-activated channel and the acetylcholine-activated channel reveal that gating is complex. More elaborate procedures of data analysis have been used in an attempt to elucidate detailed molecular gating mechanisms.

Jackson MB: Chemically activated channels in muscle and spinal cord.