Arbekacin

Arbekacin

Clinical data
AHFS/Drugs.com	International Drug Names
Routes of administration	Intramuscular, intravenous
ATC code	J01GB12 (WHO)
Legal status
Legal status	℞ (Prescription only)
Pharmacokinetic data
Metabolism	minimal
Excretion	Renal
Identifiers
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
CAS Number	51025-85-5 Y
PubChem (CID)	11398765
DrugBank	DB06696 Y
ChemSpider	9573665 Y
UNII	G7V6SLI20L Y
KEGG	D07462 Y
ChEMBL	CHEMBL426926 N
Chemical and physical data
Formula	C22H44N6O10
Molar mass	552.62 g/mol
3D model (Jmol)	Interactive image
SMILES O=C(N[C@H]3[C@H](O[C@H]1O[C@@H]([C@@H](O)[C@H](N)[C@H]1O)CO)[C@H](O)[C@H](O[C@H]2O[C@H](CN)CC[C@H]2N)[C@@H](N)C3)[C@@H](O)CCN
InChI InChI=1S/C22H44N6O10/c23-4-3-12(30)20(34)28-11-5-10(26)18(37-21-9(25)2-1-8(6-24)35-21)17(33)19(11)38-22-16(32)14(27)15(31)13(7-29)36-22/h8-19,21-22,29-33H,1-7,23-27H2,(H,28,34)/t8-,9+,10-,11+,12-,13+,14-,15+,16+,17+,18+,19-,21+,22+/m0/s1 Y Key:MKKYBZZTJQGVCD-JLZDOWJMSA-N Y
NY (what is this?)

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). Arbekacin was originally synthesized from dibekacin in 1973. It has been registered and marketed in Japan since 1990 under the trade name Habekacin. Arbekacin is no longer covered by patent and generic versions of the drug are also available under such trade names as Decontasin and Blubatosine.

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.

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.

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.