According to the membrane hypothesis of affective disorders, disturbances in lipid-protein interactions can be predisposing factor in depression. The hypothesis is based on well known fact that lipid-protein interactions affect functionality of most membrane integral proteins, including enzymes, receptors, transporters and ion channels ensuring transmembrane signal transduction. Moreover, changes in lipid-protein interactions induced by antidepressive drugs can be crucial step in molecular mechanism of their action.

        Key words: membranes, depressive disorder, serotonin transporter, antidepressants.