Gatifloxacin (mesylate) is an antibiotic of the fourth-generation fluoroquinolone family, it inhibits the bacterial enzymes DNA gyrase and topoisomerase IV.Target: AntibacterialGatifloxacin (mesylate) is the mesylate salt of Gatifloxacin which is an antibiotic of the fourth-generation fluoroquinolone family, that like other members of that family, inhibits the bacterial enzymes DNA gyrase and topoisomerase IV. Gatifloxacin had activity equal to that of tosufloxacin and activity more potent than those of norfloxacin, ofloxacin, ciprofloxacin, and sparfloxacin against the second-step mutants (grlA gyrA; gatifloxacin MIC range, 1.56 to 3.13 microg/ml) and had the most potent activity against the third-step mutants (grlA gyrA grlA; gatifloxacin MIC range, 1.56 to 6.25 microg/ml), suggesting that gatifloxacin possesses the most potent inhibitory activity against singly mutated topo IV and singly mutated DNA gyrase among the quinolones tested [1].Ophthalmic gatifloxacin 0.3% is at least as effective as ciprofloxacin at healing corneal ulcers infected with Pseudomonas aeruginosa when gatifloxacin is administered less frequently than ciprofloxacin. Trends favored gatifloxacin in fluorescein retention scores [2].Clinical indications: Bacterial infection Toxicity: Hepatotoxicity; Acute pancreatitis [3]; Torsades de pointes [4]
Ethambutol Dihydrochloride is a bacteriostatic antimycobacterial agent, which obstructs the formation of cell wall by inhibiting arabinosyl transferases.Target: AntibacterialEthambutol directly affects two polymers, arabinogalactan (AG) and lipoarabinomannan (LAM) in Mycobacterium smegmatis. In M. smegmatis, Ethambutol inhibits synthesis of arabinan completely and inhibits AG synthesis most likely as a consequence of this; more than 50% of the cell arabinan is released from the bacteria following Ethambutol treatment, whereas no galactan is released. Ethambutol main targets against embB gene product in M. avium. Ethambutol induces 60% changes in the embB gene in M. tuberculosis resistant mutants [1]. Ethambutol is effective against actively growing microorganisms of the genus Mycobacterium, including M. tuberculosis. Nearly all strains of M. tuberculosis and M. kansasii as well as a number of strains of the M. aviumcomplex (MAC) are sensitive to Ethambutol. [1] Ethambutol is potency against M. tuberculosis (H37Rv) with MIC of 0.5 μg/mL in vitro [2]. Ethambutol is efficient on treatment of mycobacterial-infected macrophages. When M. tuberculosis infected macrophages are treated with 6 μg/mL Ethambutol, the log CFUs following treatment for 3 days is 4.17, while value in control group is 4.8. The MICs for M. avium (MTCC 1723) and M. smegmatis (MTCC 6) are 15 μg/mL and 0.18 μg/mL, respectively. Ethambutol is efficient in animal model. 100 mg/kg Ethambutol given orally 15 days post i.v. infection 1 ×/week for 5 weeks, induces a lower log CFU compared with untreatment (4.59 vs 5.07) [3].
Amastatin hydrochloride is a slow, tight binding, competitive aminopeptidase (AP) inhibitor with Ki values of 0.26 nM, 30 nM, 52 nM for Aeromonas aminopeptidase, cytosolic leucine aminopeptidase, microsomal aminopeptidase[1].
Norfloxacin hydrochloride is a broad-spectrum antibiotic that is active against both Gram-positive and Gram-negative bacteria, which functions by inhibiting DNA gyrase.Target: DNA gyrase; AntibacterialNorfloxacin is a synthetic chemotherapeutic antibacterial agent occasionally used to treat common as well as complicated urinary tract infections. Norfloxacin is a broad-spectrum antibiotic that is active against both Gram-positive and Gram-negative bacteria. It functions by inhibiting DNA gyrase, a type II topoisomerase, and topoisomerase IV, enzymes necessary to separate bacterial DNA, thereby inhibiting cell division.There are currently three approved uses in the adult population (one of which is restricted) and the other ineffective due to bacterial resistance. Chibroxin (ophthalmic) is approved for use in children older than one year of age.Norfloxacin is associated with a number of rare serious adverse reactions as well as spontaneous tendon ruptures and irreversible peripheral neuropathy. Tendon problems may manifest long after therapy had been completed and in severe cases may result in lifelong disabilities. Hepatoxicity resulting in fatalities has also been reported with the use of norfloxacin.
(6E,12E)-Tetradecadiene-8,10-diyne-1,3-diol is an antibacterial compound. (6E,12E)-Tetradecadiene-8,10-diyne-1,3-diol can be isolated from the roots of Atractylodes japonica. (6E,12E)-Tetradecadiene-8,10-diyne-1,3-diol has anti-methicillin-resistant Staphylococcus aureus (MRSA) activity with MIC values of 4-32 μg/mL. (6E,12E)-Tetradecadiene-8,10-diyne-1,3-diol can be used for the research of bacterial infection[1].
ClpB-IN-1 (compound 7) is a potent ClpB inhibitor[1].
Poly-L-lysine hydrochloride is a nonspecific attachment factor for cells useful in promoting cell adhesion to solid substrates by enhancing electrostatic interaction between negatively charged ions of the cell membrane and the culture surface. Poly-L-lysine is a strong-attraction regulator that promotes liquid-liquid phase separation (LLPS) at low concentrations but suppresses LLPS at high concentrations. Antibacterial cationic peptide.[1].
Aspoxicillin is a broad-spectrum antimicrobial agent against 68 isolates of Actinobacillus pleuropneumoniae with an MIC90 value of <= 0.05 μg/ml. Aspoxicillin has a long half-life in mouse serum of 55 minutes[1][2].
Polyketide synthase 13-IN-2 (comp 42) is a polyketide synthase 13 inhibitor against Mycobacterium tuberculosis, with an MIC of 0.25 μg/mL[1].
Antitubercular agent-18 (Compound 9a) is an antitubercular agent with MIC values of 2, 2, 2 and 128 µg/ml against M. tuberculosis H37Rv, Spec. 192, Spec 210 and Spec. 800, respectively. Antitubercular agent-18 shows highly selective antimycobacterial effects[1].
Coumermycin A1 is a JAK2 signal activator. Coumermycin A1 inhibits DNA Gyrase which thereby inhibits cell division in bacteria.
Rifamycin sodium (Rifamycin SV monosodium) belongs to the family of ansamycin antibiotics and has been isolated from the fermentation of A. mediterranei or its mutants. Rifamycin sodium displays a broad spectrum of antibiotic activity against Gram-positive and, to a lesser extent, Gram-negative bacteria[1].
Antibacterial agent 45, an antibacterial agent, significantly lowers MIC value of antibacterial agent Ceftazidime[1].
Loganetin is a non-toxic natural product that may be applied in the antibacterial drug development for treating multidrug-resistant Gram negative infections.
Caracemide (NSC-253272) is a novel anticancer agent derived from a hydroxamic acid. Caracemide inactivates R1 by covalent modification at the substrate-binding site and inhibits the enzyme ribonucleotide reductase of Escherichia coli. Caracemide has demonstrated to produce severe central nervous system (CNS) toxicity. Caracemide has a toxic metabolite, methylisocyanate (MIC), in vivo[1][2].
Cefazedone (Refosporen) is a first-generation cephalosporin with activity against Gram-positive and Gram-negative bacteria, and it is effective in the treatment of infections caused by sensitive bacteria. Cefazedone is a time-dependent antibiotic, the time of concentration exceeds the minimum inhibitory concentration (MIC) is the key pharmacokinetic-pharmacodynamic (PK-PD) variable associated with the killing of pathogens[1].
PXYC1 is a ribosomal protein S1 (RpsA) antagonist with Kds of 0.81 and 0.31 μM for RpsA-CTD and RpsA-CTD Δ438A, respectively. RpsA plays an important role in the trans-translation process of Mycobacterium Tuberculosis (Mtb)[1].
Ampicillin trihydrate (D-(-)-α-Aminobenzylpenicillin trihydrate) is a broad-spectrum beta-lactam antibiotic against a variety of gram-positive and gram-negative bacteria.
Sulopenem (CP-70429) is an orally active, parenteral penem antibiotic with broad-spectrum activities against Gram-positive and Gram-negative bacteria. Sulopenem has the potential for urinary tract infections and intra-abdominal infections treatment. Sulopenem is inactive against Pseudomonas aeruginosa and Xanthomonas maltophilia[1][2][3].
Sulfisoxazole, an endothelin receptor antagonist, is a sulfonamide antibacterial with an oxazole substituent.Target: Antibacterial; Endothelin ReceptorThe sulfanilamide antibacterial agent sulfisoxazole was found to be a good endothelin receptor antagonist (IC50's of 0.60 microM and 22 microM for the ETA and ETB receptors, respectively) [1]. Sulfisoxazole is used to treat or prevent infections in many different parts of the body. It belongs to the group of medicines known as sulfonamide antibiotics. It works by preventing the growth of bacteria [2].
Iclaprim is a new selective bacterial Dihydrofolate inhibitor, which can inhibit the growth of S. aureus (MRSA) with an MIC90 of 0.06 mg/mL.
Trovafloxacin-d4 mesylate is the deuterium labeled Trovafloxacin mesylate. Trovafloxacin mesylate is a broad-spectrum quinolone antibiotic with potent activity against Gram-positive, Gram-negative and anaerobic organisms. Trovafloxacin mesylate blocks the DNA gyrase and topoisomerase IV activity. Trovafloxacin mesylate is also a potent, selective and orally active pannexin 1 channel (PANX1) inhibitor with an IC50 of 4 μM for PANX1 inward current. Trovafloxacin mesylate does not inhibit connexin 43 gap junction or PANX2. Trovafloxacin mesylate leads to dysregulated fragmentation of apoptotic cells by inhibiting PANX1[1][2][3].
Ceratotoxin A, a 29-residue peptide isolated from the accessory gland secretion fluid, with strong anti-bacterial activity.
Butylparaben sodium strongly influences the later stages of the spermatogenesis in the testis through the deterioration of hormonal control and/or RNA and protein synthesis[1].
GSK3036656 (GSK070) is a potent, selective and orally active inhibitor of M. tuberculosis leucyl-tRNA synthetase, with an IC50 of 0.20 μM. GSK3036656 can be used for the research of tuberculosis[1].
Tuberculosis inhibitor 7 (compound 2d) is a 3-methoxy-2-phenylimidazo[1,2-b]pyridazine derivative that shows highly active against Mycobacterium tuberculosis (MIC90 of 0.63 μM) and Mycobacterium marinum (MIC90 of 0.63 μM)[1].
(-)-Corynoxidine is an acetylcholinesterase inhibitor with an IC50 value of 89.0 μM, isolated from the aerial parts of Corydalis speciosa[1].(-)-Corynoxidine exhibits antibacterial activities against Staphylococcus aureus and methicillin-resistant S. aureus strains in different degrees[2].
Aloin (mixture of A&B) is anthraquinone derivative isolated from Aloe vera. Aloin (mixture of A&B) has diverse biological activities such as anti-inflammatory, immunity, antidiabetic, antioxidant, antibacterial, antifungal, and antitumor activities. Aloin (mixture of A&B) also an effective inhibitor of stimulated granulocyte matrix metalloproteinases (MMPs)[1][2].
Tryglysin B is an antimicrobial peptide inhibits the growth of other streptococci[1].
(-)-Pinocembrin exhibits anti-mycobacterium activity against mycobacteriuum tuberculosis H37Ra with an IC50 value of 1.11 mg/mL in dormant phase and 1.21 mg/mL in active phase, respectively. (-)-Pinocembrin has potent antiproliferative activity with IC50 values of 1.88-11.00 mg/mL against THP-1, A549, Panc-1, HeLa and MCF7 cell lines[1].