Human TLR4 Stable Cell Line-HEK293T

The researchers wanted to control pro-inflammatory responses through the TLR4 signaling pathway, which is required for acute infection prevention and recovery from Gram-negative infections. They focused on the TLR4/MD-2 complex, which detects bacterial LPS. They created novel synthetic glycolipids with a picomolar affinity for TLR4/MD-2 using crystal structure-inspired design, known as disaccharide-based lipid A mimetics (DLAMs). These DLAMs mimic the 3D form of E. coli lipid A and maintain structural stiffness through an α,α-(1↔1)-linked disaccharide scaffold. The researchers used phosphorylation and acylation patterns to tailor TLR4 activation in human and mouse immune cells, lung epithelial cells, and TLR4-transfected HEK293 cells.

Figure 1. The researchers utilized the TLR4 Stable Cell Line-HEK293 to study dose-dependent activation and inhibition of TLR4 signaling. They analyzed responses to various ligands compared to known stimulants and inhibitors, calculating EC50 values. The experiments demonstrated both activation and competitive inhibition of TLR4 signaling using synthetic antagonists, with data consolidated from three independent experiments. (Heine H, et al., 2021)