Preclinical study of the cyclodextrin-polymer conjugate of camptothecin CRLX101 for the treatment of gastric cancer

Shikha Gaur, Linling Chen, Terence Yen, Yafan Wang, Bingsen Zhou, Mark Davis, Yun Yen

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Camptothecin showed remarkable anticancer activity in animal models of cancer but was restricted in clinical use for its adverse toxicity in patients. The preclinical efficacy of CRLX101, a nanoparticle (NP) assembly containing cyclodextrin-based polymer and camptothecin was evaluated by in vitro cytotoxicity in gastric cancer cell lines and in vivo antitumor effects in human gastric cancer cell line BGC823 xenografts. Treated tumor sections were analyzed for presence of NPs and compared with vehicle control tumors for hypoxia and angiogenesis. Gastric cancer cell lines showed high in vitro cytotoxicity for CRLX101 and also showed strong antitumor activity in vivo. Electron micrographs revealed the intracellular presence of NPs in close proximity to vesicles. A significant decrease in expressions of carbonic anhydrase, VEGF, and CD31 proteins in treated tumors indicated an inhibition of hypoxia and angiogenesis. The results provide preclinical data for gastric adenocarcinoma. From the Clinical Editor: This study describes a nanoparticle assembly containing cyclodextrin-based polymer and camptothecin, resulting in increased bioavailability of camptothecin, an effective but toxic anti-cancer agent. The antitumor effects and safety profile were demonstrated in a gastric carcinoma cell line.

Original languageEnglish
Pages (from-to)721-730
Number of pages10
JournalNanomedicine: Nanotechnology, Biology, and Medicine
Volume8
Issue number5
DOIs
Publication statusPublished - Jul 1 2012
Externally publishedYes

Keywords

  • Camptothecin
  • CPT-11
  • Gastric cancer
  • Immunohistochemistry
  • Nanoparticle
  • Polymer conjugate

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Bioengineering
  • Biomedical Engineering
  • Molecular Medicine
  • Materials Science(all)
  • Pharmaceutical Science

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