S100A8 and serum lipopolysaccharide activity: In a mouse model of endotoxemia, LPS rapidly induced S100A8/A9 release and acute cardiac depression, while genetic deficiency of S100A9 or pharmacological blockade of S100A8/A9 with ABR-238901 prevented or reversed myocardial dysfunction and reduced systemic inflammation (Jakobsson et al., 2023).