Key Points
- The study aims to investigate the expression and characteristics of the minimal K+ channel protein (minK) in mammalian cells.
- Transiently transfected mammalian HEK 293 cells were used for expression studies.
- MinK current characteristics were compared with slow cardiac delayed rectifier K+ current (IKs) recorded from guinea pig heart cells.
- Immunolocalization was performed using antibodies directed against the minK channel protein.
- MinK activity was successfully expressed in HEK 293 cells, resembling the IKs found in guinea pig heart cells.
- Antibodies against minK reacted with surface antigens on adult guinea pig ventricular myocytes and sinoatrial nodal cells.
- The findings suggest that a minK-like protein is responsible for IKs in guinea pig hearts.
Structured PICO
PPopulationMammalian cells (HEK 293) and adult guinea pig ventricular myocytes and sinoatrial nodal cells
IInterventionTransient transfection of minK and immunolocalization using an antibody against the minK channel protein
OOutcomeCharacteristics of expressed minK current and immunolocalization of minK proteinsurrogate
The study provides strong evidence that a minK-like protein underlies the slow cardiac delayed rectifier K+ current (IKs) in mammalian hearts.