IL-6 in the infarcted heart is preferentially formed by fibroblasts and is modulated by purinergic signaling. Alter C, Henseler AS, Owenier C, Hesse J, Ding Z, Lautwein T, Bahr J, Hayat S, Kramann R, Kostenis E, Scheller J, Schrader J.J Clin Invest. 2023 Mar 21:e163799. doi: 10.1172/JCI163799. Online ahead of print.