The study investigates how Na+ transport regulation in renal epithelia is influenced by cholesterol levels in both apical and basolateral membranes.
The researchers found that removing cholesterol from the apical membrane did not significantly impact overall electrical activity, but removing it from the basolateral membrane led to a decrease in Na+/K+ pump activity.
Additionally, cholesterol extraction from the apical membrane lowered the likelihood of sodium channel openings, thereby affecting the transport response to various stimuli like hypotonicity and hormonal activation.