Patch-clamp technique for studying ion channels in activated platelets

In this study, we have revisited the existing and suggested new approaches to the use of patch-clamp methodology for measuring the activity of single ion channels and membrane potential of human platelets in the cell-attached configuration. We recorded single-channel events of platelets in the cell-attached configuration after activation with potent agonists: thrombin and ionomycin. The feasibility of platelet membrane potential measurement in cell-attached mode was investigated both experimentally and with the help of simple electrical circuits, revealing that the single-channel events can alter the recorded potential by invoking oscillations. Here, the simple approach to obtain inside-out configuration was described and calcium-dependent single-channel ion currents were recorded. Taken together, this study introduces new approaches for further investigations of the role of ion channels and membrane potential in platelet physiological and pathophysiological response.