Sepsis

DT-5461 is an IL-1 and TNF-α antagonist. DT-5461 competitively binds lipid A-binding sites on macrophage receptors, blocks LPS (HY-D1056)-initiated signaling, inhibits LPS-induced cytokine release, prevents LPS-induced serum cytokine production in mice, and protects against LPS-induced lethal endotoxemia. DT-5461 can be used for the research of lethal endotoxemia, medullary tubular mammary carcinoma, poorly differentiated colon adenocarcinoma, squamous-cell lung carcinoma, and gelatinous gastric adenocarcinoma.

Lb54 is a caspase-3 and caspase-7 activator with an EC₅₀ of 660.9 nM for human procaspase-3. Lb54 activates caspase-3/7, which cleaves Gasdermin D (GSDMD) at aspartic acid residue 87 to generate a p10 fragment, preventing formation of the pore-forming p30 fragment of GSDMD. Lb54 suppresses GSDMD-mediated pyroptosis through caspase-3/7 activation, thereby attenuating inflammatory responses and conferring protection against sepsis. Lb54 alleviates acute lung injury, and inhibited systemic inflammation by restraining the maturation of monocyte-derived dendritic cells. Lb54 can be used for the research of sepsis.

Sulfamethylphenazole potassium (Sulfapyrazole potassium; Vesulong potassium) is a long-acting sulfonamide antibacterial agent. Sulfamethylphenazole potassium maintains effective chemotherapeutic blood concentrations through the slow release of free sulfonamide from a protein-binding reservoir and can be used in combination with antibiotics such as Terramycin for bovine hemorrhagic septicemia. Sulfamethylphenazole potassium exhibits moderate antimycobacterial activity against Mycobacterium tuberculosis H37Rv (MIC = 15.38 μg/mL) and inhibitory activity against CYP 2C9. Sulfamethylphenazole potassium can be used in studies related to tuberculosis and hemorrhagic septicemia.

Sulfamethylphenazole sodium (Sulfapyrazole sodium; Vesulong sodium) is a long-acting sulfonamide antibacterial agent. Sulfamethylphenazole sodium maintains effective chemotherapeutic blood concentrations through the slow release of free sulfonamide from a protein-binding reservoir and can be used in combination with antibiotics such as Terramycin for bovine hemorrhagic septicemia. Sulfamethylphenazole sodium exhibits moderate antimycobacterial activity against Mycobacterium tuberculosis H37Rv (MIC = 15.38 μg/mL) and inhibitory activity against CYP 2C9. Sulfamethylphenazole sodium can be used in studies related to tuberculosis and hemorrhagic septicemia.

D-Captopril is a NDM-1 inhibitor and a competitive BlaB inhibitor, with an IC₅₀ value of 21.8 µM against NDM-1 and a K_i of 70-100 µM against BlaB. D-Captopril synergistically reduces the minimum inhibitory concentration of Meropenem (HY-13678) against NDM-1-expressing bacteria. D-Captopril binds to BcII via its thiolate sulfur atom and carboxylate group, altering metal ion occupancy and modulating Cd²⁺ binding affinity. D-Captopril can be used in the research of neonatal meningitis, sepsis and bacterial infections.

Lipid X is a 2,3-diacylglucosamine-1-phosphate that serves as the monosaccharide precursor of lipid A, possessing both LPS antagonist and weak agonist activities. Lipid X exerts protective effects by inhibiting tumor necrosis factor production, monocyte procoagulant activity, and neutrophil priming. Lipid X may induce transient pulmonary hypertension, neutropenia, and mild pyrogenic effects in laboratory animals. Lipid X has low toxicity and no in vitro antibacterial activity, but it significantly reduces mortality following Gram-negative bacterial infection and endotoxin exposure. Lipid X tends to accumulate in liver tissue, binds to circulating cellular components, and can be converted to lipid Y through transesterification. Lipid X can be used in research on Gram-negative bacterial sepsis, endotoxemia, and associated pulmonary hypertension.

Phen-DC3 is a bisquinolinium G-quadruplex (G4) ligand. Phen-DC3 selectively binds to and stabilizes the hybrid quadruplex-duplex hybrid (QDH) derived from the PIM1 promoter. Phen-DC3 also binds to the c-myc promoter Pu24T G4 via extensive π-stacking, and induces polymerase stalling at α-synuclein DNA and RNA G4 sequences. Phen-DC3 Trifluoromethanesulfonate (HY-15594A) downregulates LPS (HY-D1056)-induced TNFRSF21, RIPK3 and p-MLKL in VECs, and ameliorates CLP-induced pulmonary vascular leakage in septic rats. Phen-DC3 can be used in studies related to neurodegenerative diseases and sepsis-associated vascular injury.