pneumoniae

Lipopolysaccharides from Klebsiella pneumoniae (LPS, from bacterial [Klebsiella pneumoniae]) are lipid-polysaccharide endotoxins and TLR4 activators originating from Klebsiella pneumoniae, classified as S-type LPS. They exhibit a characteristic tripartite structure comprising an O-antigen, a core oligosaccharide, and lipid A. These lipopolysaccharides may contribute to bacterial immune evasion by inhibiting complement-mediated killing and suppressing host antimicrobial peptide secretion, thus helping bacteria evade immune defenses. Possessing high viscosity and serum resistance, they can potentially induce sepsis. Additionally, these lipopolysaccharides are utilized in the development of animal models for sepsis/septicemia.

TP0586532 is effective against carbapenem-resistant Klebsiella pneumoniae and does not pose a cardiovascular risk.

Ethylhydrocupreine hydrochloride (Optochin hydrochloride) is a derivative of quinine with antimicrobial activity against Streptococcus pneumoniae and antimalarial activity with an IC50 of 25.75 nM against Plasmodium falciparum. It is also an agonist of Gallus gallus2 receptors (ggTas2r1, ggTas2r2, and ggTas2r7).

Chlamydia pneumoniae-IN-1 (compound 55), a benzimidazole derivative, exhibits potent antibacterial activity, inhibiting 99% of C. pneumoniae growth at a concentration of 10 μM while maintaining 95% viability of host cells. It effectively inhibits the CV-6 strain of C. pneumoniae with a minimum inhibitory concentration (MIC) of 12.6 μM, demonstrating its antichlamydial efficacy [1].

O-Glycanase, Streptococcus pneumoniae, acts on core disaccharides containing N-acetylgalactosamine.

α2-3 Neuraminidase S, Streptococcus pneumoniae, is a glycoside hydrolase enzyme capable of hydrolyzing the glycosidic bonds of neuraminic acid.

Topoisomerase IV, Streptococcus pneumoniae (EC 5.99.1.), is produced by overexpressing its subunit in Escherichia coli.

Blasticidin S HCl is a natural product and an inhibitor of protein synthesis. Blasticidin S HCl is a broad-spectrum antibiotic that can inhibit the cell growth of prokaryotes, fungi, plants and mammalian cells.

LpxH-IN-AZ1 is a potent inhibitor of the UDP-2,3-diacylglucosamine pyrophosphate hydrolase, LpxH, and sulfonylpiperazine compounds.LpxH-IN-AZ1 exhibits antimicrobial activity and inhibits Klebsiella pneumoniae with an IC50 of 0.36 μM.

Meropenem (SM 7338) is a synthetic carbapenem antibiotic with broad-spectrum antibacterial activity. It exerts a bactericidal effect by inhibiting the synthesis of peptidoglycan in the bacterial cell wall and is active against a wide range of Gram-positive, Gram-negative, and anaerobic bacteria. Meropenem is active against both susceptible and resistant Neisseria gonorrhoeae (MIC values of 0.02–0.06 mg/mL), Haemophilus influenzae (MIC: 0.03–0.12 mg/mL), and Klebsiella pneumoniae (MIC: 0.015–0.12 mg/mL). Meropenem can be used for constructing bacterial infection models and screening for antimicrobial activity.

JH-LPH-33 is a UDP-2,3-diacylglucosamine pyrophosphate hydrolase LpxH inhibitor with antimicrobial activity for the study of bacterial infections.

Solithromycin (OP-1068) is an orally bioavailable antimicrobial agent that inhibits cell viability, protein synthesis, and growth rate of Streptococcus pneumoniae, Staphylococcus aureus, Staphylococcus aureus, and Haemophilus influenzae with IC50 values of 7.5 ng/mL, 40 ng/mL, and 125 ng/mL, respectively.Solithromycin inhibits protein biosynthesis by binding to the large 50S subunit of the ribosome.

Cefuroxime (Cephuroxime) is an orally active second-generation cephalosporin antibiotic with antimicrobial activity that inhibits both Gram-positive and Gram-negative bacteria, and is used in the study of soft tissue infections.

Aspoxicillin, a broad-spectrum antimicrobial agent, demonstrates efficacy against 68 isolates of Actinobacillus pleuropneumoniae, with a minimum inhibitory concentration (MIC90) of <= 0.05 μg/ml. It exhibits a prolonged half-life of 55 minutes in mouse serum.

α-(difluoromethyl)-DL-Arginine (RMI 71897) is an enzyma-activated, irreversible inhibitor of arginine decarboxylase for E. coli (Ki = 800 μM), Pseudomonas aeruginosa, and Klebsiella pneumoniae. At 0.01 mM, it has been shown to prevent osmotic stress-induced increases in arginine decarboxylase activity and putrescine synthesis in oat leaf cells. When combined with a variety of polyamine analogues, α-(difluoromethyl)-DL-Arginine inhibited the growth of Trypanosoma Crui in mammalian host cells at a minimum concentration of 10 mM and prevented the growth of Trypanosoma Crui in T-cell receptor alpha-deficient mouse models.

PF-04753299 is a potent and selective inhibitor of UDP-3-O-(R-3-hydroxymyristol)-N-acetylglucosamine deacetylase (LpxC), demonstrating bactericidal effects against gonococcal isolates and exhibiting inhibitory activity against E. coli, P. aeruginosa, and K. pneumoniae, with minimum inhibitory concentration (MIC) 90 values of 2 μg/ml, 4 μg/ml, and 16 μg/ml, respectively. This compound is utilized in researching gram-negative bacterial infections [1].

Moxifloxacin (Avelox) is a fourth-generation fluoroquinolone that has been shown to be effective against Gram-positive, Gram-negative, and atypical strains, as well as multi-drug resistant Streptococcus pneumoniae.

3,5-Dimethylbenzaldehyde has broad-spectrum antimicrobial activity, inhibiting Bacillus subtilis, Pseudomonas albicans, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Streptococcus pneumoniae.

Delafloxacin (WQ-3034) (RX-3341, ABT-492) is a fluoroquinolone antibiotic agent. It has potent inhibitory against levofloxacin-resistant Streptococcus pneumoniae strains (MIC: 0.0078-0.125 μg/ml).

Copper(Ⅱ) Sulfate (Cupric sulfate) has a variety of antibacterial activities and has inhibitory activity against Staphylococcus aureus, Streptococcus pneumoniae, Pseudomonas aeruginosa, Plasmodium falciparum, etc.

Biclotymol is an antimicrobial agent and a compound with inhibitory activity against Gram-positive cocci, with an MIC of 150 μM against Streptococcus pneumoniae and Haemophilus influenzae. This compound possesses anti-inflammatory, analgesic, and cell permeability properties, and is used in research related to ear-nose-throat infections and throat pain.

CHEMBL1276927 (N-(3-(1H-benzo[d]imidazol-2-yl)phenyl)-3-methylbenzamide) shows antibacterial and antiparasitic activities against Chlamydia pneumoniae and Leishmania donovani.

Faropenem daloxate (Faropenem medoxil) is useful for penem and antibiotics. Faropenem medoxomil has excellent in vitro activity against Streptococcus pneumoniae, Haemophilus influenzae and other key pathogens implicated in acute bacterial rhinosinusitis.Faropenem daloxate is the first oral penem in a new class of beta-lactam antibiotics.

Cefditoren is an antibiotic characterized by its oral efficacy and broad-spectrum antimicrobial activities, effectively inhibiting both Gram-negative and Gram-positive bacterial activities. It displays a MIC50 of 0.25-0.5 mg/L against Streptococcus pneumoniae strains. Additionally, Cefditoren is utilized in treating respiratory and skin infections.