Dilmapimod tosylate is a potent p38 mitogen-activated protein kinase (MAPK) inhibitor. It was investigated for its anti-inflammatory effect in non-head injury trauma patients at risk for developing acute respiratorydistresssyndrome. IL-1β was identified as a gene regulated by dilmapimod that could influence c-reactive protein levels. Dilmapimod had been in phase III clinical trials by GlaxoSmithKline for the treatment of rheumatoid arthritis, neuropathic pain, coronary artery disease (CAD) and chronic obstructive pulmonary disease (COPD).
(±)9(10)-DiHOME, the diol derivative of (±)9(10)-EpOME—a cytochrome P450-derived epoxide of linoleic acid also known as leukotoxin—is formed through the action of soluble epoxide hydrolase (sEH) in neutrophils. It exhibits toxicity towards Sf21 cells expressing sEH as well as tolacZ-expressing control cells, differing from leukotoxin which only harms sEH-containing cells. Furthermore, combined exposure to 9(10)- and 12(13)-DiHOME leads to cell death in rabbit renal proximal tubule cells by disrupting mitochondrial respiration, and causes lung injury, respiratorydistress, and mortality in mice, highlighting its role as a toxic lipid mediator. Specifically, 9(10)-DiHOME has been associated with acute respiratorydistresssyndrome (ARDS), a severe and often deadly complication in patients with major burns. Elevated levels of this compound have been detected in the bronchoalveolar lavage fluid (BALF) of women, but not men, with chronic obstructive pulmonary disease (COPD), and its levels are also increased in patients with allergic asthma, indicating its significance in respiratory conditions.