CFTR and cystic fibrosis: On the other hand, genistein has been proposed previously as a potential drug for treatment of some genetic diseases, including cystic fibrosis and mucopolysaccharidoses, though different properties of this isoflavone (correction of the mutated CFTR protein and impairment of glycosaminoglycan synthesis, respectively) were considered (Węgrzyn et al. 2010).