Sedlák M, Pravda M, Kubicová L, Mikulcíková P, Ventura K. Synthesis and characterisation of a new pH-sensitive amphotericin B--poly(ethylene glycol)-b-poly(L-lysine) conjugate.
Bioorg Med Chem Lett 2007;
17:2554-7. [PMID:
17336066 DOI:
10.1016/j.bmcl.2007.02.009]
[Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2007] [Revised: 02/01/2007] [Accepted: 02/03/2007] [Indexed: 11/24/2022]
Abstract
This paper reports on the synthesis, characterisation, and efficiency of a new intravenous conjugate of amphotericin B (AMB). Twelve molecules of AMB were attached to block copolymer poly(ethylene glycol)-b-poly(L-lysine) via pH-sensitive imine linkages. In vitro drug release studies demonstrated the conjugate (M(w)=26,700) to be relatively stable in human plasma and in phosphate buffer (pH 7.4, 37 degrees C). Controlled release of AMB was observed in acidic phosphate buffer (pH 5.5, 37 degrees C) with the half-life of 2 min. The LD(50) value determined in vivo (mouse) is 45 mg/kg.
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