Catechin inhibits Candida albicans dimorphism by disrupting Cek1 phosphorylation and cAMP synthesis.

Candida albicans is a fungal pathogen that undergoes dimorphism (transformation from a yeast form to a hyphal form), wherein, the yeast form is identified as a disseminating form that plays a critical role in the early stages of Candida disease progression, while the hyphal form is found to exert additional pathogenicity by adapting to various environmental conditions. Here, we elucidated the effects of catechin on C. albicans hyphal formation. Flow cytometry analysis showed catechin inhibited FCS-induced hyphal formation. Moreover, hypha-specific gene expression in MAP kinase cascade and cAMP pathway was decreased ascribable to catechin. Furthermore, through Western blotting and cAMP synthesis analysis, we found catechin obstructs Cek1 phosphorylation in MAP kinase cascade and suppresses cAMP synthesis. These results suggest that catechin possesses anti-dimorphism activity by interfering with in vitro signal transduction. Similarly, this highlights the possible application of catechin in clinical therapy for the management and prevention of candidosis.