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Published on: July 11, 2012
Synthesis of Tridecaptin-Antibiotic Conjugates with in Vivo Activity against Gram-Negative Bacteria
Stephen A Cochrane1, Xuefeng Li2, Sisi He2
1Department of Chemistry, University of Alberta , Edmonton, Alberta, T6G 2G2, Canada.
Abstract:
A series of tridecaptin-antibiotic conjugates were synthesized and evaluated for in vitro and in vivo activity against Gram-negative bacteria. Covalently linking unacylated tridecaptin A1 (H-TriA1) to rifampicin, vancomycin, and erythromycin enhanced their activity in vitro but not by the same magnitude as coadministration of the peptide and these antibiotics. The antimicrobial activities of the conjugates were retained in vivo, with the H-TriA1-erythromycin conjugate proving a more effective treatment of Klebseilla pneumoniae infections in mice than erythromycin alone or in combination with H-TriA1.
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