Abstract
The class of platinum-containing bioactive agents, including cisplatin as the prototype, and structurally related second- and third-generation compounds, has developed during the past two decades as one of the most important family of antitumor drugs. However, despite a highly valued general antineoplastic performance profile, their unrestricted oncological administration continues to be hampered by pharmacological shortcomings, notably excessive toxicity and induction of drug resistance. This has prompted ongoing intensive development activities in pharmaceutic laboratories worldwide, and one of the most promising approaches emanating from these activities involves the drug conjugation to biomedically functional, water-soluble carrier polymers. Such macromolecular conjugates, judiciously designed and synthesized, provide significant pharmacological advantages over non-polymeric drug systems, notably increased cell specificity and facilitated cell entry, paired with reduced toxicity and resistance problems. In the present project, this technology has been applied specifically to the synthesis of Pt-containing polymers in which the metal is carrier-bound via dihydroxylatoplatinum chelation. In the cancerous target cell, such conjugates will deliver the free bioactive Pt complex hydrolytically for its cytotoxic action. The water-soluble polymeric products, fractionated by dialysis in membrane tubing with molecular-mass cut-off of 25,000, will be submitted to an outside institution for in vitro evaluation of cytotoxic properties.
Similar content being viewed by others
References
A. Prestayko, S. Crooke, S. Carter (eds.) Cisplatin: Current Status and New Developments (Academic Press, New York, 1980)
N. Farrell, Transition Metal Complexes as Drugs and Chemotherapeutic Agents (Kluwer Academic, Dordrecht, 1987), p.67
W.R. Waud, Cancer Chemotherapeutic Agents, ed. by W.D. Foye (Amer. Chem. Soc. Washington, DC, 1995), p. 121
E.W. Neuse, S. Afr. J. Sci. 95, 509 (1999)
M.J. McKeage, Expert Opin. Investig. Drugs. 14, 1033 (2005)
D.W. Siegmann-Louda, C.E. Carraher, Jr., Macromolecules Containing Metal and Metal-like Elements, chap. 6, vol. 3, ed by A. S. Abd-El-Aziz et al. (Wiley, New York, 2004)
M. Galanski, B.K. Keppler, Anti-Cancer Agents Med. Chem. 7, 55 (2007)
R. Duncan, Nat. Rev. Drug Discov. 2, 247 (2003)
J. Kopeček, Eur. J. Pharm. Sci. 20, 1 (2003)
R.J. Christie, D.W. Grainger, Adv. Drug Deliv. Rev. 55, 421 (2003)
R. Duncan, M.J. Vicent, F. Grego, R.W. Nicholson, Endocr. Relat. Cancer 12, S189 (2005)
A. Nori, J. Kopeček, Adv. Drug Deliv. Rev. 57, 609 (2005)
E.W. Neuse, in Macromolecules Containing Metal and Metal-like Elements, vol. 3, ed. by A.S. Abd-El-Aziz, C.E. Carraher, et al. (Wiley, New York, 2004), p. 89
H. Maeda, Adv. Drug Deliv. Rev. 6, 181 (1991)
J. Bariyanga, M.T. Johnson, E.M. Mmutlane, E.W. Neuse, J. Inorg. Organometal. Polym. Mater. 15, 335 (2005)
L.L. Komane, E.H. Mukaya, E.W. Neuse, J. Inorg. Organometal. Polym. Mater. 18, 111 (2008)
T. Smit, J.R. Snyman, E.W. Neuse, L. Bohm, C.E.J. van Rensburg, Anti-Cancer Drugs 16, 1 (2005)
M.G. Meirim, E.W. Neuse, G.C. Caldwell, J. Appl. Polym. Sci. 73, 2143 (1999)
F. Danusso, P. Ferruti, Polymer 11, 88 (1970)
P. Ferruti, M.A. Marchisio, R. Duncan, Macromol. Rapid Commun. 23, 332 (2002)
G. Caldwell, E.W. Neuse, S. Afr. J. Chem. 45, 93 (1992)
G. Caldwell, E.W. Neuse, A. Stephanou, J. Appl. Polym. Sci. 50, 393 (1993)
M.G. Meirim, E.W. Neuse, G. Caldwell, J. Inorg. Organometal. Polym. 8, 225 (1998)
P. Neri, G. Antoni, F. Benvenuti, F. Cocola, G. Gazzai, J. Med. Chem. 16, 893 (1973)
P. Neri, G. Antoni, Macromol. Synt. 8, 25 (1982)
G. Caldwell, E.W. Neuse, G. Perlwitz, J. Appl. Polym. Sci. 66, 911 (1997)
D.D. N’Da, E.W. Neuse, M. Nell, C.E.J. van Rensburg, S. Afr. J. Chem. 59, 33 (2003)
J.D. Hoeschele, N. Farrell, W.R. Turner, C.D. Rithner, Inorg. Chem. 27, 4106 (1988)
M.L. de Machado, E.W. Neuse, A.G. Perlwitz, S. Schmitt, Polym. Adv. Technol. 1, 275 (1990)
J. Drobnik, V. Saudek, J. Vlasak, J. Kalal, J. Polym. Sci. Polym. Symp. 66, 65 (1979)
Acknowledgments
The authors gratefully acknowledge grants from the South African Medical Research Council, the National Research Foundation, and the Western Platinum Refinery. Generous solvent donations were made by Sasol Ltd., Engen Chemicals, and Bayer (Pty) Ltd. Special thanks are due also to Mr. Jan de Bruin, Anglo-American Research Laboratories, for performing the microanalytical platinum determinations.
Author information
Authors and Affiliations
Corresponding author
Additional information
The authors wish to dedicate this study to Dr. Charles U. Pittman, Jr. in recognition of his contributions to the field of inorganic and organometallic polymers.
Rights and permissions
About this article
Cite this article
N’Da, D.D., Neuse, E.W. Water-Soluble Macromolecular Platinum Conjugates Derived from 1,2-Dihydroxyl-Functionalized Carrier Polymers. J Inorg Organomet Polym 20, 468–477 (2010). https://doi.org/10.1007/s10904-010-9326-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10904-010-9326-0