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Polyvalent Oligonucleotide Gold Nanoparticle Conjugates as Delivery Vehicles for Platinum(IV) Warheads

Open access
Dhar, Shanta, Daniel, Weston L., Giljohann, David A., Mirkin, Chad A., Lippard, Stephen J.·2009·Journal of the American Chemical Society

Abstract

Amine-functionalized polyvalent oligonucleotide gold nanoparticles (DNA-Au NPs) were derivatized with a cisplatin prodrug, and the resulting DNA-Au NP conjugates were used to internalize multiple platinum centers. A platinum(IV) complex, c,c,t-[Pt(NH(3))(2)Cl(2)(OH)(O(2)CCH(2)CH(2)CO(2)H)], was tethered to the surface of DNA-Au NPs through amide linkages. The platinum-tethered gold nanoparticles were taken into several cancer cells. The drop in intracellular pH facilitated reductive release of cisplatin from the prodrug, which then formed 1,2-d(GpG) intrastrand cross-links in the cell nuclei, as confirmed by an antibody specific for this adduct. The cytotoxicity of the platinum(IV) complex increases significantly in several cancer cell lines when the complex is attached to the surface of the DNA-Au NPs and in some instances exceeds that of cisplatin.

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Metadata

Authors
Dhar, S., Daniel, W. L., Giljohann, D. A., Mirkin, C. A., & Lippard, S. J.
Venue
Journal of the American Chemical Society
Published
2009-09-24
Volume
131
Issue
41
Pages
14652-14653
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W1980961223
Cited by
510
References
0
FWCI
17.31
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Polyvalent Oligonucleotide Gold Nanoparticle Conjugates as Delivery Vehicles for Platinum(IV) Warheads. https://app.cochat.ai/papers/10.1021/ja9071282
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Dhar, S., Daniel, W. L., Giljohann, D. A., Mirkin, C. A., & Lippard, S. J. (2009). Polyvalent Oligonucleotide Gold Nanoparticle Conjugates as Delivery Vehicles for Platinum(IV) Warheads. Journal of the American Chemical Society. https://doi.org/10.1021/ja9071282

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