Degradable cross-linked nanoassemblies as drug carriers for heat shock protein 90 inhibitor 17-N-allylamino-17-demethoxygeldanamycin

Andrei Ponta, Shanjida Akter, Younsoo Bae

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Cross-linked nanoassemblies (CNAs) with a degradable core were prepared for sustained release of 17-N-allylamino-17-demethoxygeldanamycin (17-AAG), a potent inhibitor of heat shock protein 90 (HSP90). The particle size of CNAs ranged between 100 and 250 nm, which changed depending on the cross-linking yields and drug entrapment method. CNAs with a 1% cross-linking yield entrapped 17-AAG in aqueous solutions, yet degraded in 3 hrs. CNAs entrapped 5.2 weight% of 17-AAG as the cross-linking yield increased to 10%, retaining more than 80% of particles for 24 hrs. CNAs with drugs entrapped after the cross-linking reactions were 100 nm and remained stable in both pH 7.4 and 5.0, corresponding to the physiological, tumoral, and intracellular environments. Drug was completely released from CNAs in 48 hrs, which would potentially maximize drug delivery and release efficiency within tumor tissues. Drug release patterns were not negatively affected by changing the cross-linking yields of CNAs. CNAs entrapping 17-AAG suppressed the growth of human non-small cell lung cancer A549 cells as equally effective as free drugs. The results demonstrated that CNAs would be a promising formulation that can be used in aqueous solutions for controlled delivery and release of 17-AAG.

Original languageEnglish
Pages (from-to)1281-1292
Number of pages12
JournalPharmaceuticals
Volume4
Issue number10
DOIs
StatePublished - 2011

Keywords

  • Cancer chemotherapy
  • Controlled drug release
  • Drug delivery
  • Heat shock protein 90
  • Nanoassemblies

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmaceutical Science

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