Bioreducible Cross-Linked Hyaluronic Acid/Calcium Phosphate Hybrid Nanoparticles for Specific Delivery of siRNA in Melanoma Tumor Therapy

Zhanwei Zhou, Huipeng Li, Kaikai Wang, Qian Guo, Chenzi Li, Hulin Jiang, Yiqiao Hu, David Oupicky, Minjie Sun

Research output: Contribution to journalArticlepeer-review

82 Scopus citations


This study introduces a novel cross-linking strategy capable of successfully stabilizing CaP nanoparticles and stimuli-responsive small interfering RNA (siRNA) release. We synthesized a polysaccharide derivative thiolated hyaluronic acid (HA-SH), which was slightly modified but multifunctional and developed a smart redox-responsive delivery system. siRNA was efficaciously condensed by calcium phosphate (CaP) via electrostatic interaction to form a positively charged inner "core". Disulfide cross-linked HA (HA-ss-HA) was formed and played a role as an anionic outer "shell" to stabilize the CaP core. We demonstrated that the nanoparticles were stable both in the storage milieu and systemic circulation, thus overcoming the most serious disadvantage of CaP nanoparticles for gene delivery. Meanwhile, this smart system could selectively release siRNA into the cytosol by both a GSH-triggered disassembly and successful endosomal escape. Therefore, the hybrid delivery system achieved an 80% gene-silencing efficiency in vitro for both luciferase and Bcl2. Silencing of Bcl2 resulted in dramatic apoptosis of B16F10 cells. Besides, equipped with the tumor-targeting component HA, the nanoparticles significantly suppressed the growth of B16F10 xenograft tumor in mice. The anionic HA-ss-HA-equipped nanoparticles showed no apparent toxicity in vitro or in vivo, as well as showed a high transfection efficiency. Taken together, this redox-responsive, tumor-targeting smart anionic nanoparticle holds great promise for exploitation in functionalized siRNA delivery and tumor therapy.

Original languageEnglish (US)
Pages (from-to)14576-14589
Number of pages14
JournalACS Applied Materials and Interfaces
Issue number17
StatePublished - May 3 2017


  • antitumor
  • calcium phosphate
  • hyaluronic acid
  • hybrid nanoparticles
  • redox responsive
  • siRNA delivery

ASJC Scopus subject areas

  • General Materials Science


Dive into the research topics of 'Bioreducible Cross-Linked Hyaluronic Acid/Calcium Phosphate Hybrid Nanoparticles for Specific Delivery of siRNA in Melanoma Tumor Therapy'. Together they form a unique fingerprint.

Cite this