Mixed pH-sensitive polymeric micelles for combination drug delivery

Younsoo Bae, Adam W.G. Alani, Nicole Rockich Winston, T. S.Z.Chung Lai, Glen S. Kwon

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Purpose: To prepare mixed polymeric micelles that can carry two different drugs, doxorubicin (DOX) and 17-hydroxyethylamino-17-demethoxygeldanamycin (GDM-OH), for combination cancer chemotherapy. Methods: The pH-sensitive micelles were prepared from poly(ethylene glycol)-poly(aspartate hydrazide) block copolymers to which either DOX or GDM-OH is conjugated through acid-labile hydrazone bond (individual micelles). Mixed micelles were formed not only by simply mixing two different individual micelles in aqueous solutions (aqueous mixed micelles) but also by evaporating organic solvents from the organic/aqueous mixed solvents in which two block copolymers possessing different drugs were dissolved homogeneously (organic mixed micelles). Particle size measurements, pH-dependent drug release tests, cytotoxicity assays and western blot analysis were subsequently conducted. Results: Individual and aqueous/organic mixed micelles showed clinically relevant particle size (<100 nm) and pH-dependent drug release patterns. Mixed polymer micelles suppress cancer cell growth effectively in a drug concentration, mixing method and schedule-dependent way. Conclusion: Combination chemotherapy using polymeric micelles seems to minimize a schedule-dependent change in combination drug efficacy in comparison to drug combination using DMSO formulations.

Original languageEnglish (US)
Pages (from-to)2421-2432
Number of pages12
JournalPharmaceutical Research
Volume27
Issue number11
DOIs
StatePublished - Nov 1 2010
Externally publishedYes

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Micelles
Drug Combinations
Drug delivery
Chemotherapy
Pharmaceutical Preparations
Combination Drug Therapy
Particle Size
Doxorubicin
Block copolymers
Appointments and Schedules
Particle size
Hydrazones
Cell growth
Cytotoxicity
Dimethyl Sulfoxide
Organic solvents
Assays
Neoplasms
Polymers
Western Blotting

Keywords

  • combination chemotherapy
  • drug delivery
  • mixed micelles
  • pH-controlled release
  • polymeric micelles

ASJC Scopus subject areas

  • Biotechnology
  • Molecular Medicine
  • Pharmacology
  • Pharmaceutical Science
  • Organic Chemistry
  • Pharmacology (medical)

Cite this

Mixed pH-sensitive polymeric micelles for combination drug delivery. / Bae, Younsoo; Alani, Adam W.G.; Winston, Nicole Rockich; Lai, T. S.Z.Chung; Kwon, Glen S.

In: Pharmaceutical Research, Vol. 27, No. 11, 01.11.2010, p. 2421-2432.

Research output: Contribution to journalArticle

Bae, Younsoo ; Alani, Adam W.G. ; Winston, Nicole Rockich ; Lai, T. S.Z.Chung ; Kwon, Glen S. / Mixed pH-sensitive polymeric micelles for combination drug delivery. In: Pharmaceutical Research. 2010 ; Vol. 27, No. 11. pp. 2421-2432.
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