A direct pancreatic cancer xenograft model as a platform for cancer stem cell therapeutic development

Antonio Jimeno, Georg Feldmann, Ana Suárez-Gauthier, Zeshaan Rasheed, Anna Solomon, Gang Ming Zou, Belen Rubio-Viqueira, Elena García-García, Fernando López-Ríos, William Matsui, Anirban Maitra, Manuel Hidalgo

Research output: Contribution to journalArticlepeer-review

211 Scopus citations


There is an enormous gap between the antiproliferative and in vivo antitumor efficacy of gemcitabine in cell line-based models and its clinical efficacy. This may be due to insensitiveness of the precursor, cancer stem cell (CSC) compartment to cytotoxic agents. The hedgehog pathway is associated with CSC signaling and control. We used a direct xenograft model of pancreatic cancer and a two-stage approach was used to test the hypotheses that targeting CSC could increase the efficacy of gemcitabine. Tumors from a gemcitabine-sensitive xenograft were treated with gemcitabine first, and randomized, after tumor regression to continuing treatment with gemcita-bine, a hedgehog inhibitor alone or in combination with gemcitabine. We tested markers described as associated with CSC such as CD24, CD44, ALDH, nestin, and the hedgehog pathway. After induction with gemcitabine, treated tumor showed an enrichment in CSC markers such as ALDH and CD24. Subsequently, a release from gemcitabine prompted a repopulation of proliferating cells and a decrease in such markers to equilibrate from pretreatment levels. Combined treatment with gemcita-bine and cyclopamine induced tumor regression and decrease in CSC markers and hedgehog signaling. Cyto-plasmic CD24 and ALDH were inversely and strongly associated with growth and were expressed in a minority of cells that we propose constitute the CSC compartment. Hedgehog inhibitors as part of a dual compartment therapeutic approach were able to further reduce tumor growth and decreased both static and dynamic markers of CSC. Direct tumor xenografts are a valid platform to test multicompartment therapeutic approaches in pancreatic cancer.

Original languageEnglish (US)
Pages (from-to)310-314
Number of pages5
JournalMolecular cancer therapeutics
Issue number2
StatePublished - Feb 1 2009
Externally publishedYes

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


Dive into the research topics of 'A direct pancreatic cancer xenograft model as a platform for cancer stem cell therapeutic development'. Together they form a unique fingerprint.

Cite this