blt 1

BLT-1 is a scavenger receptor BI (SR-BI)inhibitor.

BLT2 Probe 1 (Compound 13), a fluorescent probe derived from the synthetic BLT2 agonist CAY10583, offers a robust tool for exploring BLT2 receptor ligand pharmacology across various assay systems [1]. As BLT2 is a valuable target for treatments in diabetic wound healing and gastrointestinal lesions, this probe facilitates relevant biomedical research.

BLT2 antagonist-1 (compound 15b) is a selective inhibitor of the BLT2 receptor, impeding the chemotaxis of CHO-BLT2 cells at an IC50 of 224 nM without affecting CHO-BLT1 cell chemotaxis. It blocks the interaction between LTB4 and the BLT2 receptor with a K_i of 132 nM and may serve as a research tool for inflammatory airway diseases, including asthma and chronic obstructive pulmonary disease [1].

Leukotriene B4 (LTB4) is a dihydroxy fatty acid derived from arachidonic acid through the 5-lipoxygenase pathway. It promotes a number of leukocyte functions including aggregation, stimulation of ion fluxes, enhancement of lysosomal enzyme release, superoxide anion production, chemotaxis, and chemokinesis. At least two LTB4 receptors, termed BLT1 and BLT2, have been identified. 14,15-dehydro LTB4 is a LTB4 receptor antagonist that has a higher binding affinity for BLT1, demonstrating a Ki value of 27 nM, compared to BLT2, which has a Ki value of 473 nM. 14,15-dehydro LTB4 inhibits LTB4-induced release of lysozymes from rat polymorphonuclear leukoctyes with an IC50 value of 1 μM.