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LGM Pharma offers this active ingredient but not the finished dosage forms.
CAS No: 372151-71-8
AHFC code: 8:12.28.16
Chemical Formula: C80H107Cl3N11O27P
Molecular Weight: 1792.096
Assay/Purity: Typically NLT 98%
Treatment of complicated skin infections caused by gram-positive bacteria like methicillin-susceptible or -resistant Staphylococcus aureus, vancomycin-susceptible Enterococcus faecalis, and Streptococcus pyogenes, Streptococcus agalactiae, or Streptococcus anginosus group.
Telavancin is a semi-synthetic derivative of vancomycin, therefore the mode of bactericidal action is similar to vancomycin in which both antibiotics inhibit cell wall synthesis. Not only that, it displays concentration-dependent bactericidal action. Furthermore, telavancin is a more potent inhibitor (10-fold) of peptidoglycan synthesis and, unlike vancomycin, disrupts cell membrane integrity via its interaction with lipid II. AUC/MIC ratio best predicts the extent of in-vivo response in which the higher the ratio, the greater the bactericidal activity. The smallest ratio in which one would be able to observe no bacterial growth at 24 hours is 50. Maximal bactericidal activity is observed at a AUC/MIC ratio of 404.
Mode of Action:
Telavancin is a bactericidal lipoglycopeptide that is active against a broad range of gram-positive bacteria. Telavancin prevents polymerization of N-acetylmuramic acid (NAM) and N-acetylglucosamine (NAG) and cross-linking of peptidoglycan by binding to D-Ala-D-Ala. As a result, inhibition of bacterial cell wall synthesis occurs. Furthermore, telavancin disrupts membrane potential and cell permeability as a result of the lipophillic side chain moiety. This additional bactericidal mechanism is what sets telavancin apart from vancomycin.
Metabolism of telavancin does not involve the cytochrome P450 enzyme system. Primary metabolite is called THRX-651540, but the metabolite pathway has not been identified.
Laohavaleeson S, Kuti JL, Nicolau DP: Telavancin: a novel lipoglycopeptide for serious gram-positive infections. Expert Opin Investig Drugs. 2007 Mar;16(3):347-57. PubmedRubinstein E, Corey GR, Stryjewski ME, Kanafani ZA: Telavancin for the treatment of serious gram-positive infections, including hospital acquired pneumonia. Expert Opin Pharmacother. 2011 Dec;12(17):2737-50. doi: 10.1517/14656566.2011.633511. PubmedZhanel GG, Calic D, Schweizer F, Zelenitsky S, Adam H, Lagace-Wiens PR, Rubinstein E, Gin AS, Hoban DJ, Karlowsky JA: New lipoglycopeptides: a comparative review of dalbavancin, oritavancin and telavancin. Drugs. 2010 May 7;70(7):859-86. doi: 10.2165/11534440-000000000-00000. PubmedWong SL, Goldberg MR, Ballow CH, Kitt MM, Barriere SL: Effect of Telavancin on the pharmacokinetics of the cytochrome P450 3A probe substrate midazolam: a randomized, double-blind, crossover study in healthy subjects. Pharmacotherapy. 2010 Feb;30(2):136-43. doi: 10.1592/phco.30.2.136. Pubmed
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