Digestive System Disease Models

Lipopolysaccharides, from E. coli O55:B5 (LPS, from Escherichia coli (O55:B5)) are endotoxins and TLR4 activators extracted from Escherichia coli (E. coli O55:B5) and are classified as S (smooth) type LPS. Lipopolysaccharides, from E. coli O55:B5 possess the typical three-part structure: O-antigen, core oligosaccharide, and lipid A. Lipopolysaccharides, from E. coli O55:B5 activate TLR-4 in immune cells, exhibit high pyrogenicity, and demonstrate dose and serotype specificity. Lipopolysaccharides, from E. coli O55:B5 can be widely used to induce cellular inflammation and establish animal models related to inflammation.
It is recommended to prepare a solution with concentration ≥2 mg/mL. Vortex thoroughly for more than 10 minutes. Due to the adsorption characteristics of LPS, silanized container or low adsorption centrifuge tubes should be used for aliquoting and storage, and mix thoroughly before use.

Streptozotocin (Streptozocin; STZ) is an antibiotic widely used in experimental animal models of induced diabetes. Streptozotocin enters B cells via the glucose transporter (GLUT2) and causes the alkylation of DNA ( DNA-methylating ). Streptozotocin can induce the apoptosis of β cells.

Caerulein is a decapeptide and a potent cholecystokinin receptor agonist. Caerulein is a safe and effective cholecystokinetic agent with a direct spasmogenic effect on the gallbladder muscle and bile ducts.

Acetaminophen (Paracetamol) is a selective cyclooxygenase-2 (COX-2) inhibitor with an IC₅₀ of 25.8 μM; is a widely used antipyretic and analgesic agent.. Acetaminophen is a potent hepatic N-acetyltransferase 2 (NAT2) inhibitor. Acetaminophen induces ferroptosis and leads to acute liver injury in mice model.

Indomethacin (Indometacin) is a potent, orally active COX1/2 inhibitor with IC₅₀ values of 18 nM and 26 nM for COX-1 and COX-2, respectively. Indomethacin has anticancer activity and anti-infective activity. Indomethacin can be used for cancer, inflammation and viral infection research.

Triptolide is a diterpenoid triepoxide extracted from the root of Tripterygium wilfordii with immunosuppressive, anti-inflammatory, antiproliferative and antitumour effects. Triptolide is a NF-κB activation inhibitor.

Aspirin (Acetylsalicylic acid) is an orally active, potent and irreversible inhibitor of cyclooxygenase COX-1 and COX-2, with IC₅₀ values of 5 and 210 μg/mL, respectively. Aspirin induces apoptosis. Aspirin inhibits the activation of NF-κB. Aspirin also inhibits platelet prostaglandin synthetase, and can prevent coronary artery and cerebrovascular thrombosis.

Histamine is the agonist for histamine receptor and a vasodilator. Histamine is an organic nitrogen compound that participates in local immune responses, regulates intestinal physiological functions, and acts as a neurotransmitter. Histamine affects p38 MAPK/Akt signaling pathway, exhibits antitumor, antioxidant and anti-inflammatory activities. Histamine can be used in the research of acute myeloid leukemia, malignant melanoma, and renal cell carcinoma.

Lipopolysaccharides, from E. coli O111:B4 (LPS, from Escherichia coli (O111:B4)) are endotoxins and TLR4 activators extracted from Escherichia coli (E. coli O111:B4) and are classified as S (smooth) type LPS. Lipopolysaccharides (LPS), from E. coli O111:B4 possess the typical three-part structure: O-antigen, R3-type core oligosaccharide, and lipid A. Lipopolysaccharides (LPS), from E. coli O111:B4 activate TLR-4 in immune cells and can cause significant gastric diseases. Lipopolysaccharides (LPS), from E. coli O111:B4 can be used to induce cellular inflammation and establish animal models related to inflammation.
It is recommended to prepare a solution with concentration ≥2 mg/mL. Vortex thoroughly for more than 10 minutes. Due to the adsorption characteristics of LPS, silanized container or low adsorption centrifuge tubes should be used for aliquoting and storage, and mix thoroughly before use.

Taurocholic acid (N-Choloyltaurine) has marked bioactive effects such as an inhibitory potential against hepatic artery ligation induced biliary damage by upregulation of VEGF-A expression. Taurocholic acid has immunoregulation effect.

Tetracycline is a broad-spectrum antibiotic with oral activity. Tetracycline exhibits activity against a wide range of bacteria including gram-positive, gram-negative bacteria, chlamydiae, mycoplasmas and rickettsiae. Tetracycline can be used for the research of infections.

N-Nitrosodiethylamine (Diethylnitrosamine) is a potent hepatocarcinogenic dialkylnitrosoamine. N-Nitrosodiethylamine is mainly present in tobacco smoke, water, cheddar cheese, cured, fried meals and many alcoholic beverages. N-Nitrosodiethylamine is responsible for the changes in the nuclear enzymes associated with DNA repair/replication. N-Nitrosodiethylamine results in various tumors in all animal species. The main target organs are the nasal cavity, trachea, lung, esophagus and liver.

Tetracycline hydrochloride is a broad-spectrum antibiotic with oral activity. Tetracycline hydrochloride exhibits activity against a wide range of bacteria including gram-positive, gram-negative bacteria, chlamydiae, mycoplasmas and rickettsiae. Tetracycline hydrochloride can be used for the research of infections.

Dextran sulfate sodium salt (DSS) (MW 35000-45000) is a polymer of dehydrated glucose with a molecular weight of approximately 35000-45000. DSS with different molecular weights exhibits different biological activities. Dextran sulfate sodium salt (DSS) (MW 35000-45000) is a potent inducer of colitis. Dextran sulfate sodium salt (DSS) (MW 35000-45000) can be used to induce model acute colitis, chronic colitis, and colitis-related colon cancer. Dextran sulfate sodium salt (DSS) (MW 35000-45000) may be related to macrophage dysfunction, intestinal flora dysbiosis, and is particularly toxic to the colonic epithelium.

Reserpine is an inhibitor of the vesicular monoamine transporter 2 (VMAT2).

Taurocholic acid sodium (Sodium taurocholate) has marked bioactive effects such as an inhibitory potential against hepatic artery ligation induced biliary damage by upregulation of VEGF-A expression. Taurocholic acid sodium has immunoregulation effect.

Cysteamine hydrochloride (2-Aminoethanethiol hydrochloride) is an orally active agent for the treatment of nephropathic cystinosis and an antioxidant.

Thioacetamide (TAA) is an indirect hepatotoxin and causes parenchymal cell necrosis. Thioacetamide requires metabolic activation by microsomal CYP2E1 to thioacetamide-S-oxide initially and then to thioacetamide-S-dioxide, which is a highly reactive metabolite, and its reactive metabolites covalently bind to proteins and lipids thereby causing oxidative stress and centrilobular necrosis. Thioacetamide can induce chronic liver fibrosis, encephalopathy and other events model.

Phenytoin (5,5-Diphenylhydantoin) is a potent Voltage-gated Na⁺ channels (VGSCs) blocker. Phenytoin has antiepileptic activity and reduces breast tumour growth and metastasis in mice.

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.