RT Journal Article SR Electronic T1 Upregulation of interleukin-19 in severe asthma: a potential saliva biomarker for asthma severity JF ERJ Open Research JO erjor FD European Respiratory Society SP 00984-2020 DO 10.1183/23120541.00984-2020 VO 7 IS 3 A1 Fatemeh Saheb Sharif-Askari A1 Narjes Saheb Sharif-Askari A1 Swati Goel A1 Bassam Mahboub A1 Abdul Wahid Ansari A1 Mohamad-Hani Temsah A1 Adel M. Zakri A1 Elaref Ratemi A1 Rifat Hamoudi A1 Qutayba Hamid A1 Rabih Halwani YR 2021 UL http://openres.ersjournals.com/content/7/3/00984-2020.abstract AB Interleukin (IL)-19, a designated IL-20 subfamily cytokine, has been implicated in inflammatory disorders including rheumatoid arthritis, psoriasis and, lately, asthma. Here, through the analysis of transcriptomic datasets of lung tissue of large asthma cohorts, we report that IL-19 expression is upregulated in asthma and correlates with disease severity. The gene expression of IL-19 was significantly higher in lung tissue from patients with severe and mild/moderate asthma compared to healthy controls. IL-19 protein level, however, was significantly higher in the blood and saliva of patients with severe asthma compared to mild/moderate subgroups as measured by ELISA assay. IL-19 protein level was not affected by corticosteroid treatment in plasma. Our data provide insights into the potential use of IL-19 as a saliva marker for asthma severity and a potential therapeutic target.Plasma and saliva IL-19 are significantly upregulated in asthma and correlate with disease severity. Plasma IL-19 is not affected by steroid treatment. This suggests that IL-19 can be used as a biomarker of asthma severity. https://bit.ly/2QfYwpc