Carbonic anhydrase IX-directed immunoliposomes for targeted drug delivery to human lung cancer cells in vitro

Blenda Chi Kwan Wong, Hong Qi ZHANG, Ling Qin, Hubiao CHEN, Chen Fang, Aiping LYU, Zhijun YANG*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

43 Citations (Scopus)
20 Downloads (Pure)


Targeted drug delivery to cancer cells by use of antibody-conjugated liposomes (immunoliposomes) has attracted considerable interest in recent years. Despite increasing efforts in developing immunoliposomes as drug carriers, the investigation of useful tumor-associated antigen targets is far from complete. Carbonic anhydrase IX (CA IX) is a cell surface antigen characterized by hypoxia-induced expression in many solid tumors. This study investigated the feasibility of CA IX-directed immunoliposomes for targeted delivery of docetaxel to human lung cancer cells in vitro. Docetaxel-loaded immunoliposomes targeting CA IX were developed with an encapsulation efficiency of 84.4±3.9% and an average particle size of 143.9±11.1 nm. Using fluorescence-based flow cytometry, the in vitro binding activity of the immunoliposomes was found to be significantly higher (by 1.65-fold) than that of the nontargeted liposomes in CA IX-positive lung cancer cells, whereas no such difference was observed between the two groups when CA IX was not expressed. Furthermore, immunoliposomal docetaxel exhibited the strongest growth inhibitory effect against CA IX-positive lung cancer cells when compared with nontargeted liposomal docetaxel or free docetaxel solution. These data suggested that CA IX-directed immunoliposomes could serve as a promising drug delivery system for targeted killing of lung cancer cells.

Original languageEnglish
Pages (from-to)993-1001
Number of pages9
JournalDrug Design, Development and Therapy
Publication statusPublished - 22 Jul 2014

Scopus Subject Areas

  • Pharmacology
  • Pharmaceutical Science
  • Drug Discovery

User-Defined Keywords

  • Cancer chemotherapy
  • Cell surface antigen
  • Conjugation
  • Hypoxia
  • Liposome
  • Nanotechnology


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