Abstract
Recently it has been demonstrated that moderate heat treatment of Amphotericin B/deoxycholate solutions (HAmB-DOC) leads to a therapeutically interesting supramolecular rearrangement that can be observed by significant changes in light scattering, CD, and absorbance. In this study, we continue the investigation of the physical properties of this new form by evaluating the activity and kinetics of dissociation and dispersion of HAmB-DOC and AmB-DOC in saline, serum, and in model mammalian or fungal lipid biomimetic membrane vesicles. Stopped-flow spectrophotometry combined with singular value decomposition (SVD) and global analysis were used to resolve the components of this process. The dissociation kinetics for both states are complex, requiring multiexponential fits, vet in most cases SVD indicates only two significant changing species representing the monomer and the aggregate. The kinetic mechanism could involve dissociation of monomers from coexisting spectroscopically similar but structurally distinct aggregates or sequential rearrangements in supramolecular structure of aggregates. Rate constants and amplitudes of dissociation from aggregates to monomer in buffer, whole serum, 10% cholesterol, and ergosterol membrane vesicles are generally greater for AmB-DOC, demonstrating its greater kinetic instability. In addition, at comparable low concentrations, HAmB-DOC and AmB-DOC are nearly equally active at promoting cation selective permeability in ergosterol-containing membranes; however, HAmB-DOC is much less active against mammalian mimetic cholesterol-containing vesicles, despite a higher level of self-association, supporting previous observations that there exists a specific “toxic aggregate” structure.
Similar content being viewed by others
References
Hartsel, S. and J. Bolard, Amphotericin B: new life for an old drug. Trends Pharmacol Sci. 1996;17:445–449.
Hiemenz, J.W. and T.J. Walsh, Lipid formulations of amphotericin B: recent progress and future directions. Clin Infect Dis. 1996;22:133–144.
Brajburg, J. and J. Bolard, Carrier effects on biological activity of amphotericin B. Clin Microbiol Rev. 1996;9:512–531.
Bolard, J., P. Legrand, F. Heitz, and B. Cybulska, One-sided action of amphotericin B on cholesterol-containing membranes is determined by its self-association in the medium. Biochemistry. 1991;30:5707–5715.
Legrand, P., E.A. Romero, B.E. Cohen, and J. Bolard, Effects of Aggregation and Solvent on the Toxicity of Amphotericin-B to Human Erythrocytes. Antimicrob Agents Chemother. 1992;36:2518–2522.
Lamy-Freund, M.T., V.F.N. Ferreira A. Faljonialario, and S. Schreier, Effect of Aggregation on the Kinetics of Autoxidation of the Polyene Antibiotic Amphotericin-B. J Pharm Sci. 1993;82:162–166.
Lamy-Freund, M.T., V.F. Ferreira, and S. Schreier, Mechanism of mactivation of the polyene antibiotic amphotericin B. Evidence for radical formation in the process of autooxidation. J Antibiot (Tokyo) 1985;38:753–757.
Gaboriau, F., M. Cheron, L. Leroy, and J. Bolard, Physico-Chemical properties of the heat-induced ‘superaggregates’ of amphotericin B. Biophysical Chemistry. 1997;66:1–12.
Gaboriau, F., M. Cheron, C. Petit, and J. Bolard, Heat-induced superaggregation of amphotericin B reduces its in vitro toxicity: a new way to improve its therapeutic index. Antimicrob Agets Chemother. 1997;41:2345–2351.
Petit, C., V. Yardley, F. Gaboriau, J. Bolard, and S.L. Croft. Activity of a heat-induced reformulation of amphoteriein B deoxycholate (fungizone) against Leishmania donovani [In Process Citation]. Antimicrob Agents Chemother. 1999;43:390–392.
Ruckwardt, T., A. Scott, J. Scott, P. Mikulecky, and S.C. Hartsel, Lipid and stress dependence of amphotericin B ion selective channels in sterol-free membranes. Biochim Biophys Acta. 1998;1372:283–288.
Henry, E.R.a.H., J., Singular Value decomposition: Application to Analysis of Experimental Data, in Numerical Computer Methods, L.a.J. Brand, M. L., Editor. 1992, Academic Press, Inc.: p. 129–192.
Fujii, G., J.E. Chang, T. Coley, and B. Steere, The formation of amphotericin B ion channels in lipid bilayers. Biochemistry. 1997;36:4959–4968.
Lamy-Freund, M.T., S. Schreier, R.M. Peitzsch, and W.F. Reed, Characterization and time dependence of amphotericin B: deoxycholate aggregation by quasielastic light scattering. J Pharm Sci. 1991;80:262–2666.
Hartsel, S.C., C. Hatch, W. Ayenew, How Does Amphotericin B Work?: Studies on Model Systems. Journal of Liposome Research. 1993;3:377–408.
Legrand, P., M. Cheron, L. Leroy, and J. Bolard, Release of amphotericin B from delivery systems and its action against fungal and mammalian cells. Journal of Drug Targeting. 1997;4:311–319.
Lamy-Freund, M.T., V.F. Ferreira, and S. Schreier, Polydispersity of aggregates formed by the polyene antibiotic amphotericin B and deoxycholate. A spin label study. Biochim Biophys Acta. 1989;981:207–212.
Barwicz, J. and P. Tancrede, The effect of aggregation state of amphotericin-B on its interactions with cholesterol- or ergosterol-containing phosphatidylcholine monolayers. Chem Phys Lipids. 1997;85:145–155.
Tancrede, P., J. Barwicz, S. Jutras, and I. Gruda, The effect of surfactants on the aggregation state of Amphotericin B. Biochim Biophys Acta. 1990;1030:289–95.
Ceryak, S., B. Bouscarel, and H. Fromm, Comparative binding of bile acids to serum lipoproteins and albumin. J Lipid Res. 1993;34:1661–1674.
Meyuhas, D. and D. Lichtenberg, The effect of albumin on the state of aggregation and phase transformations in phosphatidylcholine-sodium cholate mixtures. Biochim Biophys Acta. 1995;1234:203–213.
Passing, R. and D. Schubert. The binding of deoxycholic acid to band 3 protein from human erythrocyte membranes and to bovine serum albumin. Hoppe Seylers Z Physiol Chem. 1983;364:219–226.
Romanini, D., B. Farruggia, and G. Pico, Absorption and fluorescence spectra of polyene antibiotics in the presence of human serum albumin. Biochem Mol Biol Int. 1998;44:595–603.
Ridente, Y., J. Aubard, and J. Bolard, Absence in amphotericin Bspiked human plasma of the free monomeric drug, as detected by SERS FEBS Lett. 1999;446:283–286.
Petit, C., V. Yardley, F. Gaboriau, J. Bolard, and S.L. Croft, Activity of a heat-induced reformulation of amphotericin B deoxycholate (fungizone) against Leishmania donovani. Antimicrob Agents Chemother. 1999;43:390–392.
Petit, C., M. Cheron, V. Joly, J.M. Rodrigues, J. Bolard, and F. Gaboriau, In-vivo therapeutic efficacy, in experimental murine mycoses of a new formulation of deoxycholate-amphotericin B obtained by mild heating [In Process Citation]. J Antimicrob Chemother. 1998;42:779–785.
Cutaia, M., S.R. Bullard, K. Rudio, and S. Rounds, Characteristics of Amphotericin-B Induced Endothelial Cell Injury. J Lab Clin Med. 1993;121:244–256.
Brajtburg, J., Elberg, S., Bolard, J., Kobayashi, G. S., Levy, R. A., Ostlund, R. E., Jr., Schlessinger, D., and G. Medoff Interaction of plasma proteins and lipoproteins with amphotericin B. J Infect Dis. 1984;149:986–997 (1) Brajtburg, J., Elberg, S.
Chavanet, P., V. Joly, D. Rigand, J. Bolard, C. Carbon, and P. Yeni, Influence of Diet on Experimental Toxicity of Amphotericin B Deoxycholate. Antimicrob Agents Chemother. 1994;38:963–968.
Vertut-Doi, A., S.I. Ohnishi, and J. Bolard, The endocytic process in CHO cells, a toxic pathway of the polyene antibiotic amphotericin B. Antimicrob Agents Chemother. 1994;38:2373–2379.
Wasan, K.M., R.E. Morton, M.G. Rosenblum, and G. Lopez-Berestein, Decreased toxicity of liposomal amphotericin B due to association of amphotericin B with high-density lipoproteins: role of lipid transfer protein. J Pharm Sci. 1994;83:1006–1010.
Wasan, K.M. and G. Lopezberestein, The interaction of liposomal amphotericin B and serum lipoproteins within the biological milieu, J Drug Target. 1994;2:373–380.
Wasan, K.M. and J.S. Conklin, Enhanced amphotericin B nephrotoxicity in intensive care patients with elevated levels of low-density lipoprotein cholesterol. Clin Infect Dis. 1997;24:78–80.
Author information
Authors and Affiliations
Corresponding author
Additional information
Published: August 21, 1999.
Rights and permissions
About this article
Cite this article
Baas, B., Kindt, k., Scott, A. et al. Activity and kinetics of dissociation and transfer of amphotericin B from a novel delivery form. AAPS PharmSci 1, 10 (1999). https://doi.org/10.1208/ps010310
Received:
Accepted:
Published:
DOI: https://doi.org/10.1208/ps010310