Marbofloxacin hydrochloride is a potent antibiotic of which depends upon its inhibition of DNA-gyrase.Target: DNA-gyraseMarbofloxacin hydrochloride is a third-generation fluoroquinolone for veterinary use, the antimicrobial of which depends upon its inhibition of DNA-gyrase and topoisomerase IV. With a broad spectrum bactericidal activity and good efficacy, marbofloxacin hydrochloride is indicated for dermatological, respiratory and urinary tract infections due to both Gram-positive and Gram-negative bacteria and Mycoplasma [1].Administration of Marbofloxacin hydrochloride at 6 mg/kg once daily for 7 days in a Staphylococcus aureus infection in tissue cages in ponies is not effective for the elimination of S. aureus infections from secluded sites [2]. The pharmacokinetic properties of marbofloxacin hydrochloride were investigated in 6 horses after i.v., subcutaneous and oral administration of a single dose of 2 mg/kg bwt and the minimal inhibitory concentrations (MIC) assessed for bacteria isolated from equine infectious pathologies. The clearance of marbofloxacin hydrochloride was mean +/- s.d. 0.25 +/- 0.05 l/kg/h and the terminal half-life 756 +/- 1.99 h. The marbofloxacin hydrochloride absolute bioavailabilities after subcutaneous and oral administration were 98 +/- 11% and 62 +/- 8%, respectively. Considering the breakpoint values of efficacy indices for fluoroquinolones, a marbofloxacin hydrochloride dosage regimen of 2 mg/kg bwt/24 h by i.v., subcutaneous or oral routes was more appropriate for enterobacteriaceae than for S. aureus [3]. Toxicity: cramps; vomiting; anorexia; soft stools; diarrhoea
JTK-853 is a novel, non-nucleoside Hepatitis C Virus (HCV) polymerase inhibitor which shows effective antiviral activity in HCV replicon cells with EC50s of 0.38 and 0.035 µM in genotype 1a H77 and 1b Con1 strains, respectively.
Ampicillin is a broad-spectrum beta-lactam antibiotic against a variety of gram-positive and gram-negative bacteria.
Protein kinase G inhibitor-1 (Compound 270) is a mycobacterial protein kinase G inhibitor, with an IC50 of 0.9 μM. Protein kinase G inhibitor-1 can be used for mycobacterial infection research[1].
1-Phenylsemicarbazide is an antifungal agent. 1-Phenylsemicarbazide has the potential for preventing mold growth on industrial products[1].
Afabicin is the prodrug of Debio1452, specifically targeting staphylococci without significant activity against other Gram-positive or Gram-negative species. Debio1452 is an inhibitor FabI, an enzyme critical to fatty acid biosynthesis in staphylococci.
Rifalazil (KRM-1648; ABI-1648), a rifamycin derivative, inhibits the bacterial DNA-dependent RNA polymerase and kills bacterial cells by blocking off the β-subunit in RNA polymerase[1]. Rifalazil (KRM-1648; ABI-1648) is an antibiotic, exhibits high potency against mycobacteria, gram-positive bacteria, Helicobacter pylori, C. pneumoniae and C. trachomatis with MIC values from 0.00025 to 0.0025 μg/ml[3]. Rifalazil (KRM-1648; ABI-1648) has the potential for the treatment of Chlamydia infection, Clostridium difficile associated diarrhea (CDAD), and tuberculosis (TB)[2].
GSK656 is a potent antitubercular agent, acting as an inhibitor of Mycobacterium tuberculosis (Mtb) leucyl-tRNA synthetase (LeuRS), with an IC50 of 0.2 μM.
Papyracillic acid, a fungal metabolite, a Penicillic acid analog, is a nonselective herbicide. Papyracillic acid has anti-bacterial, anti-fungal, nematicidal, and phytotoxic effects[1].
Propylparaben sodium is an antimicrobial agent, preservative, flavouring agent[1].
Pralurbactam is a β-Lactamase inhibitor. Pralurbactam can be used for research of bacterial infection[1][2].
PC945 is a novel broad spectrum antifungal agent that potently inhibits Aspergillus fumigatus sterol 14α-demethylase (CYP51A and CYP51B) with IC50 of 0.23 and 0.22 uM, respectively; shows MIC values 0.032 to >8 ug/ml against 96 clinically isolated A. fumigatus strains, demonstrates activity against itraconazole-susceptible and -resistant A. fumigatus growth with IC50 of 0.0012 to 0.034 ug/ml; PC945 is a broad spectrum of pathogenic fungi with MIC 0.0078 to 2 ug/ml, and exhibits activity in vivo. Fungal Infection Phase 1 Clinical
Gomisin M2 ((+)-Gomisin M2) is a lignan isolated from the fruits of Schisandra rubriflora with anti-HIV activity (EC50 of 2.4 μM). Gomisin M2 exhibits anti-cancer and anti-allergic activities and has the potential for Alzheimer’s disease research[1][2].
Meropenem is a carbapenem antibiotic, which displaying a broad spectrum of antibacterial activity.Target: AntibacterialMeropenem, a new parenteral carbapenem demonstrated increased activity as compared to imipenem against 336 strains of Neisseria gonorrhoeae, 119 strains of Haemophilus influenzae, and 110 strains of H. Ceftriaxone and ciprofloxacin demonstrated activity superior to that of both carbapenems while the activity of ceftazidime was similar to that of meropenem [1]. Meropenem, like imipenem and various experimental penems, may overcome the resistance problems presented by Class I beta-lactamases [2]. MEROPENEM was rapidly penetrated to the pleural effusion and was retained for a more prolonged time in the pleural effusion than in the blood of patients with accumulated pleural effusion, and it suggested the usefulness of MEROPENEM in antibacterial therapy for patients with pleurisy causing accumulation of pleural effusion [3].Clinical indications: Appendicitis; Bacterial infection; Bacterial meningitis; Bacterial pneumonia; Bacterial respiratory tract infection; Bacterial skin infection; Bacterial urinary tract infection; Bacteroides fragilis infection; Bacteroides infection; Bacteroides thetaiotaomicron infection; Complicated skin and skin structure infectionFDA Approved Date: July 1996Toxicity: In mice and rats, large intravenous doses of meropenem (2200-4000 mg/kg) have been associated with ataxia, dyspnea, convulsions, and mortalities.
Thymol iodide is a compound of Iodide and Thymol. Thymol iodide acts as a substitute for iodoform[1]. Thymol iodide is an iodine derivative of Thymol (a phenol derived from thyme oil), which is mostly used as mild antiseptic and fungicide[2].
Variotin is an Anti-Fungal Agent. Variotin has a strong antibiotic activity on dermatophytes such as Trichophyton, Microsporum, and Epidermophyton, and also pathogenic fungi in internal mycosis such as Blastomyces and Cryptococcus[1].
5-Nitrobarbituric acid is a herpes simplex virus type-1 (HSV-1) inhibitor (IC50=1.7 μM)[1].
Nanchangmycin, produced by Streptomyces nanchangensis NS3226, inhibits gram-positive bacteria. Nanchangmycin is a broad spectrum antiviral active against Zika virus.
Reveromycin A, a benzoquinoid antibiotic isolated from the genus Streptomyces, is a selective inhibitor of protein synthesis in eukaryotic cells. Reveromycin A inhibits bone resorption by inducing apoptosis specifically in osteoclasts. Reveromycin A has antiproliferative activity against tumor cell lines and antifungal activity[1][2].
Peptide 5g is an antimicrobial peptide. Peptide 5g inhibits E. coli, S. aureus, and C. albicans with MIC values of 30, 10, 12.5 μg/mL respectively[1].
Inz-1 is a potent and selective mitochondrial cytochrome bc1 inhibitor for yeast (IC50=8.092 μM) over humans (IC50=45.320 μM). Inz-1 reverses Fluconazole (HY-B0101) or other triazole antifungals’ resistance in the pathogenic fungus Candida albicans[1].
Tebuconazole is an agricultural azole fungicide which can also inhibit CYP51 with IC50s of 0.9 and 1.3 μM for Candida albicans CYP51 (CaCYP51) and truncated Homo sapiens CYP51 (Δ60HsCYP51), respectively.
Thiethylperazine, a phenothiazine derivate, is an orally active and potent dopamine D2-receptor and histamine H1-receptor antagonist. Thiethylperazine is also a selective ABCC1activator that reduces amyloid-β (Aβ) load in mice. Thiethylperazine has anti-emetic, antipsychotic and antimicrobial effects[1][2][3].
Metallo-β-lactamase-IN-4 (compound 40) is a potent metallo-β-lactamases (MBL) inhibitor, with IC50 values of 0.1 μM (VIM-1), 1.3 μM (NDM-1), and 5.0 μM (IMP-7), respectively[1].
Polistes mastoparan is an antimicrobial peptide. Polistes mastoparan increases S. aureus cell K+ efflux and inhibits cell viability with EC50 of 5 μM[1].
Clindamycin is an oral protein synthesis inhibitory agent that has the ability to suppress the expression of virulence factors in Staphylococcus aureus at sub-inhibitory concentrations (sub-MICs). Clindamycin resistance results from enzymatic methylation of the antibiotic binding site in the 50S ribosomal subunit (23S rRNA). Clindamycin decreases the production of Panton-Valentine leucocidin (PVL), toxic-shock-staphylococcal toxin (TSST-1) or alpha-haemolysin (Hla)[1].
Esculentoside B (Phytolaccoside B) is a natural product from the roots of Phytolacca acinosa Roxb. Esculentoside B is neurotoxic to zebrafish larvae, and impairs their central nervous system development. Esculentoside B inhibits inflammatory response and has antifungal activity[1][2][3].
SARS-CoV-2 Mpro-IN-2 (compound GC-14) is a selective, low cytotoxic and non-covalent Mpro inhibitor (IC50=0.40 μM) with good anti-SARS-CoV-2 activity (EC50=1.1 μM). SARS-CoV-2 Mpro-IN-2 can be used in COVID-19 studies[1].
Sulfisoxazole (Sulfafurazole) diethanolamine is an endothelin receptor antagonist with IC50 values of 0.60 μM and 22 μM against endothelin receptor A and endothelin receptor B, respectively. Sulfisoxazole diethanolamine is a sulfonamide antibacterial with an oxazole substituent. Sulfisoxazole diethanolamine inhibits breast cancer exosome release by targeting endothelin receptor A[1][2].
Antifungal agent 15 has the most potent activity with EC50 values of 0.52 and 0.50 μg/mL against S. sclerotiorum and B. cinerea, respectively.