cell wall

Vancomycin hydrochloride (Vancomycin HCl) is a glycopeptide antibiotic that targets Peptidoglycan in bacterial cell wall synthesis. Vancomycin hydrochloride is mainly used for the treatment of severe Gram-positive bacterial infections.

Colistin sulfate (Colistin sulfate (1066-17-7 free base)) is a cyclic polypeptide antibiotic from Bacillus colistinus, composed of Polymyxins E1 and E2.

Cefoxitin (Rephoxitin) is a broad-spectrum, orally available second-generation cephalosporins antibiotic. Cefoxitin interferes with the synthesis of bacterial cell walls. Its activity profile includes Gram-negative and Gram-positive bacteria, and is commonly used in abdominal cavity infections, pelvic infections, and certain types of gynecological infections, and is highly effective against anaerobic bacteria.

Lipopolysaccharides (LPS), derived from Escherichia coli O55:B5, are essential components of the outer membrane of Gram-negative bacteria. Composed of lipid A, a core oligosaccharide, and an O-specific polysaccharide, LPS exhibits strong immunogenicity. It activates immune cells via the TLR4 receptor, induces chemotactic cell migration and cytokine secretion, and helps maintain the integrity of the bacterial outer membrane, protecting against bile salts and lipid-based antibiotics. LPS is commonly used to establish inflammatory models, including arthritis, chronic obstructive pulmonary disease (COPD), acute respiratory distress syndrome (ARDS), and gastrointestinal disease models.

Vancomycin is a glycopeptide antibiotic that exerts its antibacterial activity by inhibiting the second stage of cell wall synthesis in susceptible bacteria. It also alters cell membrane permeability and selectively inhibits RNA synthesis. Vancomycin is commonly used to treat severe infections resistant to other antibiotics and is frequently employed in experimental studies to induce kidney injury models.

Muramic acid HCl is part of the peptidoglycan in the cell wall of many Gram-positive bacteria.

4-Methylcinnamic acid is a cinnamic acid analog that can be used as an intervention catalyst to overcome antifungal tolerance. 4-Methylcinnamic acid can improve the potency of cell wall-disrupting agents.

Ethambutol dihydrochloride is an anti-mycobacterial compound that inhibits arabinosyl transferase activity to prevent cell wall formation and can be used to induce hyperuricemia models.

Ethionamide (2-ethylthioisonicotinamide) is a nicotinamide derivative, with antibacterial activity, used to treat tuberculosis. Although the exact mechanism of action of ethionamide is unknown, it may inhibit the synthesis of mycolic acid, a saturated fatty acid found in the bacterial cell wall, thereby inhibiting bacterial cell wall synthesis. This eventually leads to bacterial cell wall disruption and cell lysis. Ethionamide may be bacteriostatic or bactericidal in action, depending on the concentration of the drug at the site of infection and the susceptibility of the organism involved.

Bacitracin (Ziba-RX), a mixture of related cyclic polypeptides, disrupts bacteria by interfering with cell wall and peptidoglycan synthesis.

Imipenem monohydrate (Imipenem) is a carbapenem antibiotic isolated from the microorganism Streptomyces cattleya, and is a β lactam antibiotic. Imipenem monohydrate acts on the bacterial cell wall, and is a broadly effective inhibitor of a wide range of Gram-positive and negative bacteria.

Diaminopimelic acid or DAPA is a lysine-like amino acid derivative that is a key component of the bacterial cell wall. DAPA is incorporated or integrated into peptidoglycan of gram negative bacteria and is the attachment point for Braun's lipoprotein (BLP or Murein Lipoprotein). BLP is found in gram-negative cell walls and is one of the most abundant membrane proteins. BLP is bound at its C-terminal end (a lysine) by a covalent bond to the peptidoglycan layer (specifically to diaminopimelic acid molecules) and is embedded in the outer membrane by its hydrophobic head (a cysteine with lipids attached). BLP tightly links the two layers and provides structural integrity to the bacterial outer membrane. Diaminopimelic acid can be found in human urine or feces due to the lysis or enzymatic breakdown of gram negative gut microbes.

Fosfomycin sodium is a bactericidal, low-molecular weight, broad-spectrum antibiotic, with putative activity against several bacteria, including multidrug-resistant Gram-negative bacteria, by irreversibly inhibiting an early stage in cell wall synthesis.

Lincomycin (U-10149) is a lincosamide antibiotic from Streptomyces that is effective against most susceptible gram-positive and cell wall-less bacteria and is generally used in patients for whom penicillin is not available.

Echinocandin B is a cyclic hexapeptide echinocandin antibiotic from Aspergillus nidulans var. echinulatus . It attacks the cell wall of fungi by inhibiting beta-1,3-glucan synthesis.

Ajoene is a disulfide that has been found inA. sativumand has diverse biological activities, including antibacterial, anticancer, antiplatelet, and antioxidant properties.1,2,3,4It is active against Gram-positive (MICs = 5-160 µg/ml) and Gram-negative bacteria (MICs = 136-200 µg/ml), as well as yeasts (MICs = 10-20 µg/ml).1Ajoene is cytotoxic to mouse melanoma cells (IC50= 18 µM), as well as human colon, lung, mammary, and pancreatic cancer cells (IC50s = 7-41 µM).2It reduces tumor growth in a B16/BL6 mouse model of melanoma when administered at a dose of 25 mg/kg every other day and decreases the number of lung metastases when administered prior to tumor cell inoculation at doses ranging from 1-25 mg/kg. It inhibits ADP- or collagen-induced platelet aggregation in isolated baboon platelets when used at concentrations ranging from 75 to 150 µg/ml and in platelet-rich plasma isolated from baboons when administered at a dose of 25 mg/kg.3Ajoene (25 mg/kg) prevents thrombus formation on damaged arterial walls in heparinized pigs in anin situmodel of thrombogenesis.5It also reduces high-fat diet-induced hepatic steatosis, histopathological markers of liver damage, thiobarbituric acid reactive substances (TBARS) formation, and protein oxidation in a mouse model of non-alcoholic fatty liver disease (NAFLD).4 1.Naganawa, R., Iwata, N., Ishikawa, K., et al.Inhibition of microbial growth by ajoene, a sulfur-containing compound derived from garlicAppl. Environ. Microbiol.62(11)4238-4242(1996) 2.Taylor, P., Noriega, R., Farah, C., et al.Ajoene inhibits both primary tumor growth and metastasis of B16/BL6 melanoma cells in C57BL/6 miceCancer Lett.239(2)298-304(2006) 3.Teranishi, K., Apitz-Castro, R., Robson, S.C., et al.Inhibition of baboon platelet aggregation in vitro and in vivo by the garlic derivative, ajoeneXenotransplantation10(4)374-379(2003) 4.Han, C.Y., Ki, S.H., Kim, Y.W., et al.Ajoene, a stable garlic by-product, inhibits high fat diet-induced hepatic steatosis and oxidative injury through LKB1-dependent AMPK activationAntioxid. Redox Signal.14(2)187-202(2011) 5.Apitz-Castro, R., Badimon, J.J., and Badimon, L.A garlic derivative, ajoene, inhibits platelet deposition on severely damaged vessel wall in an in vivo porcine experimental modelThromb. Res.75(3)243-249(1994)

Violacein is a bacterial metabolite originally isolated from C. violaceum that has antibacterial and antiprotozoal activities.[1] [2] It is produced by C. violaceum as a purple pigment in response to N-hexanoyl homoserine lactone , a property that has been modified to create a strain of C. violaceum used in detecting quorum-sensing molecules.[3] Violacein is active against Gram-positive bacteria, including B. subtilis and S. aureus (MICs = 0.8 and 1.6 µM, respectively). It is also active against P. falciparum, including chloroquine-susceptible and -resistant strains (IC50s = 0.85 and 0.63 µM, respectively).[2] It reduces parasitemia in a mouse model of nonlethal P. chabaudi chabaudi infection when administered at a dose of 7.5 mg/kg and increases survival in a mouse model of lethal P. chabaudi chabaudi infection. Violacein permeabilizes the cytoplasmic membrane of bacterial cells but does not affect the cell wall.[1]

Lipoteichoic acid, a polymer of the cell wall of gram-positive bacteria, activates the complement system by inducing C3 and inhibiting CD55, and reduces fat deposition via the IGF-1 pathway.

Colominic acid sodium salt is an N-acetylneuraminic acid homopolymer produced by Escherichia coli, used to study the process of protein polysialylation and exhibiting antibacterial activity.

Lipopolysaccharides from Escherichia coli O111:B4 are key components of the outer membrane of Gram-negative bacteria. As a smooth-type LPS, they consist of lipid A, an R3-type core oligosaccharide, and an O-specific polysaccharide. These LPS molecules exhibit high immunogenicity, can trigger strong immune responses and gastric disorders by activating the TLR-4 receptor on immune cells, and help maintain the structural integrity of the bacterial outer membrane while protecting against bile salts and lipid-based antibiotics. They are widely used to establish inflammation-related disease models, such as chronic obstructive pulmonary disease (COPD) and acute respiratory distress syndrome (ARDS).

2 -O-Galloylhyperin (FT-0689359) found in Pyrola. It increases ruminal fiber fermentability by formed wall-bound lignin in primary maize cell walls.

Uridine diphosphate glucuronic acid ammonium (UDP-α-D-glucuronic acid ammonium) is a precursor of many plant cell wall polysaccharides and is required for the production of seed mucilage.Uridine diphosphate glucuronic acid ammonium is a precursor of pathogenic fungi. ammonium is a key metabolite for pod polysaccharide synthesis in the pathogenic fungus Cryptococcus neoformans.

Enfumafungin, a triterpene glycoside extracted from Hormonema carpetanum fungus, acts as an antifungal by inhibiting (1,3)-beta-D-glucan synthase, crucial for fungal cell wall synthesis. It selectively targets yeasts and fungi, excluding Cryptococcus, without affecting Bacillus subtilis growth [1] [2].

Pectin, a heteropolysaccharide extracted from the cell wall of higher plants, plays multiple roles; it forms nanoparticles for agent delivery, acts as an adsorbent, and serves as a broad-spectrum antimicrobial agent. It binds to bacterial toxins and other irritants in the intestinal mucosa, alleviating irritation [1] [2] [3].