REVIEW Dirithromycin prevents bacteria from growing, by interfering with their protein synthesis. Dirithromycin binds to the 50S subunit of the 70S bacterial ribosome, and thus inhibits the translocation of peptides. Dirithromycin has over 10 times higher affinity to the subunit 50S than erythromycin. In addition, dirithromycin binds simultaneously in to two domains of 23S RNA of the ribosomal subunit 50S, where older macrolides bind only in one. Dirithromycin can also inhibit the formation of ribosomal subunits 50S and 30S.
REFERENCES
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Counter FT, Ensminger PW, Preston DA, Wu CY, Greene JM, Felty-Duckworth AM, Paschal JW, Kirst HA: Synthesis and antimicrobial evaluation of dirithromycin (AS-E 136; LY237216), a new macrolide antibiotic derived from erythromycin. Antimicrob Agents Chemother. 1991 Jun;35(6):1116-26.
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Brogden RN, Peters DH: Dirithromycin. A review of its antimicrobial activity, pharmacokinetic properties and therapeutic efficacy. Drugs. 1994 Oct;48(4):599-616.
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Wintermeyer SM, Abdel-Rahman SM, Nahata MC: Dirithromycin: a new macrolide. Ann Pharmacother. 1996 Oct;30(10):1141-9.
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Sides GD, Cerimele BJ, Black HR, Busch U, DeSante KA: Pharmacokinetics of dirithromycin. J Antimicrob Chemother. 1993 Mar;31 Suppl C:65-75.
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