Pathogens Infection

Cholesterol (from animal) is the major sterol in mammals. It is making up 20-25% of structural component of the plasma membrane. Plasma membranes are highly permeable to water but relatively impermeable to ions and protons. Cholesterol (from animal) plays an important role in determining the fluidity and permeability characteristics of the membrane as well as the function of both the transporters and signaling proteins. Cholesterol (from animal) is also an endogenous estrogen-related receptor α (ERRα) agonist.

L-Arginine ((S)-(+)-Arginine) is the substrate for the endothelial nitric oxide synthase (eNOS) to generate NO. L-Arginine is transported into vascular smooth muscle cells by the cationic amino acid transporter family of proteins where it is metabolized to nitric oxide (NO), polyamines, or L-proline. L-Arginine is a potent vasodilator, and can be used to induce experimental acute pancreatitis.

Zymosan A (Zymosan A from Saccharomyces cerevisiae) is a TLR2 agonist, that targeting TLRs can prevent and suppress IR-induced intestinal injury. Zymosan A exhibits a significant radioprotective effect, and protects IR-induced intestinal injury in mice. Zymosan A promotes the regeneration of intestinal stem cells (ISCs), after IR injury.

Phen-DC3 Trifluoromethanesulfonate is a bisquinolinium G-quadruplex (G4) ligand. Phen-DC3 Trifluoromethanesulfonate selectively binds to and stabilizes the hybrid quadruplex-duplex hybrid (QDH) derived from the PIM1 promoter. Phen-DC3 Trifluoromethanesulfonate 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 downregulates LPS (HY-D1056)-induced TNFRSF21, RIPK3 and p-MLKL in VECs, and ameliorates CLP-induced pulmonary vascular leakage in septic rats. Phen-DC3 Trifluoromethanesulfonate can be used in studies related to neurodegenerative diseases and sepsis-associated vascular injury.

Famotidine (MK-208) is an orally active and highly selective histamine H2 receptor antagonist. It inhibits gastric acid secretion by blocking the Gs signaling pathway, and regulates intracellular cAMP and ERK pathways. Famotidine inhibits TLR3-mediated inflammatory pathways, and reduces the expression of various inflammatory mediators and interferon-related genes. Famotidine scavenges DPPH and nitric oxide free radicals, alleviates oxidative stress damage in gastric tissue, inhibits proMMP-9, improves vascular endothelial permeability, and restores the normal physiological functions of neutrophils and eosinophils. Famotidine crosses intestinal epithelial cells via facilitated diffusion and passive diffusion, blocks paracellular cation transport, and increases intestinal transepithelial electrical resistance. Famotidine reduces serum levels of transaminases and alkaline phosphatase, exerts analgesic effects and gastric protective effects simultaneously. Famotidine can be used in studies related to COVID-19, liver injury and acute gastric ulcer.

ZY39 is a SaClpP agonist. ZY39 promotes the enzymatic hydrolysis of SaClpP and HsClpP in vitro. ZY39 inhibits the growth of Staphylococcus aureus strains. ZY39 reduces the load of Staphylococcus aureus in organs and ascites in mouse peritonitis models and zebrafish infection models, and improves the survival rate of model animals. ZY39 can be used in studies related to Staphylococcus aureus infection, such as peritonitis.

N-Methyl Leukotriene C4 (N-Methyl-LTC4) is a non-metabolizable LTC4 analog and a selective cysteinyl leukotriene receptor 2 (CysLT2) agonist, with an EC₅₀ of 46.1 nM for mouse CysLT2 and an EC₅₀ value of 122.3 nM for human CysLT2. N-Methyl Leukotriene C4 shows low potency against CysLT1. N-Methyl Leukotriene C4 activates human and mouse CysLT2 receptors, triggering calcium signaling, β-arrestin-2 binding to phosphorylated receptors, vascular leakage, hypotension, tachycardia, contraction of guinea pig ileum and trachea, mild bronchoconstriction, as well as hypertension associated with peripheral vasoconstriction. N-Methyl Leukotriene C4 can be used in research on asthma, rhinitis, sinusitis, cerebral inflammation and edema, pulmonary arterial hypertension, and cardiovascular diseases.

Anti-inflammatory agent 99 is a chalcone derivative. Anti-inflammatory agent 99 inhibits LPS (HY-D1056)-induced NF-κB nuclear translocation and suppress the phosphorylation of JNK, ERK, and p38. Anti-inflammatory agent 99 inhibits the expression of cytoinflammatory factors such as TNF-α and IL-6 induced by LPS. Anti-inflammatory agent 99 can be used for the research of LPS-induced septic shock.

Verekitug (ASP-7266; TRAB-1; UPB-101) is a human monoclonal antibody targeting the thymic stromal lymphopoietin receptor (TSLPR), with a mean half-life of approximately 20 days. At doses of Verekitug ≥100 mg, complete and sustained TSLPR-specific occupancy is achieved, and the antibody does not bind to IL-7Rα. By inhibiting TSLP-driven inflammatory responses, Verekitug blocks TSLP-induced cell proliferation and TARC expression, while reducing fractional exhaled NO levels, blood eosinophil counts, and levels of IL-5 and IgE. Verekitug significantly improves scores for nasal polyps, nasal congestion and olfactory dysfunction, with favorable safety and good tolerability; potential adverse reactions include headache, upper respiratory tract infection, sinusitis and nasopharyngitis. Verekitug is used in relevant studies on asthma, chronic rhinosinusitis with nasal polyps and chronic obstructive pulmonary disease.

Anti-Mouse TIGIT Antibody (1G9) is a mouse-derived agonistic TIGIT IgG1 κ type antibody. Anti-Mouse TIGIT Antibody (1G9) blocks CD155 binding to TIGIT. Anti-Mouse TIGIT Antibody (1G9) shows potent anti-infection and anti-immune effects in septic and experimental autoimmune encephalomyelitis.

Oleoyl-2-hydroxy-sn-glycero-3-phospho-L-serine sodium (18:1 Lyso-PS) is a modified PS product generated following NADPH oxidase activation and Lyso-PS signal transduction. 1-Oleoyl-2-hydroxy-sn-glycero-3-phospho-L-serine sodium signals through macrophage G2A to enhance the phagocytic uptake of PS-dependent apoptotic (apoptosis) neutrophils and PS-exposed activated neutrophils. 1-Oleoyl-2-hydroxy-sn-glycero-3-phospho-L-serine sodium enhances macrophage phagocytic uptake of apoptotic cells, carboxylate-modified microspheres, and PS-exposed non-apoptotic activated neutrophils. 1-Oleoyl-2-hydroxy-sn-glycero-3-phospho-L-serine sodium serves as an acyl acceptor substrate for the lysophosphatidyltransferase At1g78690p to generate diacylphosphatidylserine. 1-Oleoyl-2-hydroxy-sn-glycero-3-phospho-L-serine sodium reduces the secretion of IL-8 and decreases the proportion of viable colon cancer cells. 1-Oleoyl-2-hydroxy-sn-glycero-3-phospho-L-serine sodium is applicable to studies on peritonitis and inflammatory bowel disease.

Z-Leu-Arg-AMC is a fluorogenic peptide substrate for cysteine proteases (e.g., Cathepsin) (Ex=350 nm，Em=460 nm). Z-Leu-Arg-AMC is preferentially cleaved by Cathepsin K and S under weakly acidic conditions, while its hydrolysis relies on residual Cathepsin S activity at neutral pH. Z-Leu-Arg-AMC serves as a substrate for recombinant Sphenophorus levis Cathepsin L, falcipain-2, falcipain-3, berghepain-2, knowlepain-2, vivapain-2, as well as falcipain-2 chimeras and constructs. It enables quantitative detection of cysteine protease activity in human inflammatory bronchoalveolar lavage fluid via fluorescence generation. Z-Leu-Arg-AMC can be used in research related to pulmonary inflammatory diseases and malaria.

NP3-253 is an orally active and brain-penetranted NLRP3 inflammasome inhibitor. NP3-253 functions as a molecular glue that prevents NACHT-subdomain rearrangements, locking NLRP3 in an inactive conformation. NP3-253 inhibits production of pro-inflammatory cytokines IL-1β and IL-18. NP3-253 can be used for the research of inflammation and neurological disease, suah as peritonitis.

Anti-Mouse CD47/IAP Antibody (MIAP301) is an anti-mouse CD47/IAP IgG2a monoclonal antibody. Anti-Mouse CD47/IAP Antibody (MIAP301) can effectively block CD47 signaling and enhance macrophage phagocytic function. Anti-Mouse CD47/IAP Antibody (MIAP301) can increase the infiltration of immune cells. Anti-Mouse CD47/IAP Antibody (MIAP301) restores the phagocytic function of myeloid cells and alleviate B cell inhibition. Anti-Mouse CD47/IAP Antibody (MIAP301) may interfere with wound healing. Anti-Mouse CD47/IAP Antibody (MIAP301) can be used for researches on cancer, inflammation and infection conditions such as melanoma, intestinal mucosal repair and sepsis.

Rolitetracycline is a highly soluble, broad-spectrum antibiotic derived from tetracycline. Rolitetracycline binds to and stabilizes bovine serum albumin, and also inhibits HIV-1 integrase, blocks Aβ fibril formation and suppresses dengue virus proliferation. Rolitetracycline mediates the inhibition of Aβ fibrils via a specific three-dimensional pharmacophore conformation, and exerts bacteriostatic and bactericidal activities. Rolitetracycline acts synergistically with Penicillin G (HY-N7139) or Cephalothin (HY-B1275A) to alter the effects on microbial growth. Rolitetracycline serves as an important tool compound for the study of bacterial infections (urinary tract infections, sepsis), HIV-1 and dengue virus infections, as well as Alzheimer's disease.

SMT-738 is a bacterial bactericide. SMT-738 targets the small molecules responsible for lipoprotein transport in Enterobacteriaceae, causing abnormal lipoprotein localization and bacterial cell death. SMT-738 inhibits the growth of E. coli and K. pneumoniae. SMT-738 reduces bacterial loads in mouse models of urinary tract infection, bloodstream infection, and pulmonary infection caused by Enterobacterales. SMT-738 can be used in the research of Enterobacteriaceae infections, urinary tract infections, bloodstream infections, and pneumonia.

nor-NOHA acetate is a selective and reversible Arginase inhibitor. nor-NOHA acetate induces Apoptosis in ARG2-expressing cells under hypoxia. nor-NOHA acetate has anti-leukemic activity. nor-NOHA acetate improves liver ischemia-reperfusion injury. nor-NOHA acetate can used in study of tuberculosis, endothelial dysfunction, immunosuppression and metabolism.

Resolvin E2 ((-)-Resolvin E2) is an endogenous lipid mediator produced from eicosapentaenoic acid (EPA) under the catalysis of 5-lipoxygenase (5-LOX), and its production increases in hypoxic environments. Resolvin E2 antagonizes BLT1, partially activates ChemR23, and promotes ubiquitin-proteasome-mediated degradation of COX-2. Resolvin E2 reduces the production of prostaglandin E₂, blocks polymorphonuclear leukocyte infiltration, and promotes the resolution of airway inflammation. Resolvin E2 ameliorates lipopolysaccharide (LPS) (HY-D1056)-induced depressive-like behaviors. Resolvin E2 can be used in research related to depression, murine peritonitis, neonatal asthma, and other conditions.

Polymyxin B2 is a polypeptide antibiotic with particularly potent antibacterial activity against Gram-negative bacteria. Polymyxin B2 kills bacteria by binding to lipopolysaccharide molecules on the bacterial cell membrane, disrupting membrane integrity and causing leakage of intracellular contents. Polymyxin B2 is used in studies related to Pseudomonas aeruginosa infection and acute enteritis.

ESAT6 Epitope is a ESAT6 CD4⁺ T cell epitope. ESAT6 Epitope binds to MHC class I molecules with an IC₅₀ value of approximately 180 nM. ESAT6 Epitope has weak immunogenicity. ESAT6 Epitope can be used in studies related to pulmonary tuberculosis.