The present disclosure relates to a method of treating, ameliorating or preventing a disorder by blocking the signaling pathway of c-Met, wherein said method comprises the step of administering a therapeutically effective amount of a composition to a subject in need thereof, which composition contains a lipocalin mutein or a fragment or a variant thereof. In addition, the present disclosure relates to a diagnostic composition suitable for use in, e.g., an immuno-imaging technique to detect the presence of c-Met as well as the uses thereof.