The present invention relates to the use of an antisecretory protein, derivative, homologue, and/or fragment thereof, having equivalent activity, and/or a pharmaceutically active salt thereof, for the manufacture of a pharmaceutical composition and/or a medical food for the treatment and/or prevention of dysfunction, e.g. abnormal function, hypo- or hyper-function of lipid rafts, receptors and/or caveolae. A dysfunction of lipid rafts, receptors and/or caveolae may be caused by or be a cause of a variety of other conditions, which are also encompassed by the present invention, such as vascular, and lung dysfunctions, and/or endocrine disorders, e.g. diabetes and related disorders. Furthermore, the invention relates to a method for the treatment and/or prevention of dysfunction of lipid rafts and/or caveolae in a mammal in need thereof.