JUP and periodontal disorder: In a periodontal disease scenario, we propose the following possible virulence activities related to Pg‐linked MUC5AC stimulation: (a) Oral Pg secretes Kgp and Rgp, which in turn travels down to pulmonary tissues (such as the tracheal and bronchial tissues) and, consequently, induces MUC5AC among pulmonary epithelial cells; and (b) oral Pg (bacterial cell itself) weakly attaches along pulmonary tissues and, concurrently, secretes Pg gingipains, which may result in higher levels of MUC5AC stimulation.