Arbekacin

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Arbekacin
Arbekacin.png
Systematic (IUPAC) name
(2S)-4-amino-N-[(1R,2S,3R,4R,5S)-5-amino-2-{[(2S,3R,4S,5S,6R)-4-amino-3,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}-4-{[(2R,3R,6S)-3-amino-6-(aminomethyl)oxan-2-yl]oxy}-3-hydroxycyclohexyl]-2-hydroxybutanamide
Clinical data
AHFS/Drugs.com International Drug Names
Legal status
  • (Prescription only)
Routes of
administration
Intramuscular, intravenous
Pharmacokinetic data
Metabolism minimal
Excretion Renal
Identifiers
CAS Number 51025-85-5 YesY
ATC code J01GB12
PubChem CID 11398765
DrugBank DB06696 YesY
ChemSpider 9573665 YesY
UNII G7V6SLI20L YesY
KEGG D07462 YesY
ChEMBL CHEMBL426926 N
Chemical data
Formula C22H44N6O10
Molar mass 552.62 g/mol
 NYesY (what is this?)  (verify)

Arbekacin (INN) is a semisynthetic aminoglycoside antibiotic. It is primarily used for the treatment of infections caused by multi-resistant bacteria including methicillin-resistant Staphylococcus aureus (MRSA).[1][2] Arbekacin was originally synthesized from dibekacin in 1973. It has been registered and marketed in Japan since 1990 under the trade name Habekacin.[3] Arbekacin is no longer covered by patent and generic versions of the drug are also available under such trade names as Decontasin and Blubatosine.

Pharmacology[edit]

Arbekacin is approved for the treatment of pneumonia and sepsis caused by methicillin-resistant Staphylococcus aureus (MRSA). Because of its synergistic effect with beta-lactams, Arbekacin also holds promise as a treatment for multidrug-resistant Gram-negative bacterial infections such as multidrug-resistant Pseudomonas aeruginosa and Acinetobacter baumannii.[4]

Pharmacodynamics[edit]

Aminoglycosides such as Arbekacin work by binding to the bacterial 30S ribosomal subunit, causing misreading of tRNA which consequently, leaves the bacterium unable to synthesize proteins vital to its growth. Energy is needed for aminoglycoside uptake into the bacterial cell. Anaerobes have less energy available for this uptake, so aminoglycosides are less active against anaerobes.

Mechanism of action[edit]

Aminoglycosides such as Arbekacin inhibit protein synthesis in susceptible bacteria by irreversibly binding to the bacterial 30S ribosomal subunit. Specifically, Arbekacin binds to four nucleotides of 16S rRNA and a single amino acid of protein S12. This interferes with the decoding site in the vicinity of nucleotide 1400 in the 16S rRNA component of the 30S subunit. This region interacts with the wobble base in the anticodon of tRNA. This leads to misreading of mRNA, so incorrect amino acids are inserted into the polypeptide, leading to nonfunctional or toxic peptides and the breakup of polysomes into nonfunctional monosomes.

Absorption[edit]

Aminoglycosides are not well absorbed from the gastrointestinal tract, so they are typically administered parenterally.

Toxicity[edit]

Ototoxicity and nephrotoxicity are the most serious adverse effects of aminoglycoside therapy and are more likely to occur in patients with a history of renal impairment or who are receiving other ototoxic and/or nephrotoxic drugs. Normal duration of intramuscular or intravenous aminoglycoside therapy is 7–10 days, though longer treatment is sometimes necessary. Toxicity is more likely to occur when aminoglycoside treatment is continued for longer than 10 days.

References[edit]

  1. ^ Inoue, M., M. Nonoyama, R. Okamoto, T. Ida (1994). "Antimicrobial activity of arbekacin, a new aminoglycoside antibiotic, against methicilin-resistant Staphylococcus aureus". Drugs Exp Clin Res 20 (6): 233–240. PMID 7758395. 
  2. ^ Cordeiro, J. C. R., Reis, A. O., Miranda, E. A., Sader, H. S., The Arbekacin Study Group (2001). "In vitro antimicrobial activity of the aminoglycoside arbekacin tested against oxacillin-resistant Staphylococcus aureus isolated in Brazilian hospitals". Brazilian J Infectious Diseases 5 (3): 130–135. PMID 11506776. 
  3. ^ Kobayashi, Y., Uchida, H., Kawakami, Y. (1995). "Arbekacin". Intl J Antimicrobial Agents 5 (4): 227–230. doi:10.1016/0924-8579(95)00014-Y. PMID 18611673. 
  4. ^ Matsumoto T (2014). "Arbekacin: another novel agent for treating infections due to methicillin-resistant Staphylococcus aureus and multidrug-resistant Gram-negative pathogens". Clinical Pharmacology: Advances and Applications 6: 139–148. doi:10.2147/CPAA.S44377. PMID 25298740.