15‐HETrE inhibits platelet aggregation in response to different agonists. (A) Washed human platelets were treated with 15‐HETrE (10 μM) or vehicle (DMSO) for 10 min and then stimulated with increasing concentrations of collagen (n = 4–6, p = .0311), thrombin (n = 6, p = .0484), ADP (n = 6, p = .0007), or AA (n = 5‐6, 0.2720) in an aggregometer. Data represent mean ± SEM of the maximum aggregation (bottom panel) and representative data (top panel). One‐way ANOVA statistical analysis with Dunnett's multiple comparison post hoc test. (B) Washed human platelets (n = 5‐8) were treated with increasing concentrations of 12‐HETrE, 15‐HETrE, 15‐HETE, or 15‐HEPE and then stimulated with collagen (0.25 μg/mL). Data represent mean ± SEM on the right and representative data are shown in the three graphs on the left. One‐way ANOVA statistical analysis with Dunnett's multiple comparison post hoc test was performed between DMSO and oxylipins. *p < .05, **p < .01, ***p < .001, ****p < .0001. DMSO concentration corresponds to the residual DMSO in the 10 μM oxylipin sample.