The present invention relates to modulators of the Neuregulin (NRG) family,particularly NRG1 and more particularly NRG1β, and most particularlyNRG1β1. The present invention also relates to the use of such modulatorsto inhibit goblet cell hyperplasia and therefore also relates to the use of suchmodulators in the treatment or prevention of human diseases and disorders featuringpathological mucus production such as COPD, CF, chronic bronchitis and asthma.