HOMEPRODUCTSCOMPANYCONTACTFAQResearchDictionaryPharmaSign Up FREE or Login

Inhibition of pancreatic stellate cell activation by halofuginone prevents pancreatic xenograft tumor development.

AbstractOBJECTIVES:
Most solid tumors consist of neoplastic and nonneoplastic cells and extracellular matrix components. In the pancreas, activated stellate cells (PSCs) are the source of the extracellular matrix proteins. We evaluated the significance of PSC activation in tumor establishment and development in mouse xenografts.
METHODS:
Xenografts were established by implanting human pancreatic cancer cells (MiaPaca-2) subcutaneously or orthotopically by injecting them into the spleen. Fibrosis was induced by cerulein. Collagen level was evaluated by Sirius red staining. Prolyl 4-hydroxylase β and stellate cell activation-associated protein (Cygb/STAP) were determined by immunohistochemistry.
RESULTS:
Halofuginone inhibited subcutaneous tumor development implanted with Matrigel and reduced collagen and prolyl 4-hydroxylase β levels. Few tumors, which developed slowly, were observed after MiaPaca-2 implantation without Matrigel. Increase in tumor number and rate of development were observed with addition of PSCs from control pancreas, and further increase was observed when the PSCs were from cerulein-treated mice. Preincubation of the PSCs with halofuginone elicited Cygb/STAP level reduction and tumor growth inhibition. More tumors developed orthotopically in cerulein-treated mice than in controls; this was prevented by halofuginone.
CONCLUSIONS:
Extracellular matrix production by activated PSCs is essential for tumor establishment and growth. Thus, inhibition of PSC activation is a viable means of reducing pancreatic tumor development.
AuthorsItai Spector, Hen Honig, Norifumi Kawada, Arnon Nagler, Olga Genin, Mark Pines
JournalPancreas (Pancreas) Vol. 39 Issue 7 Pg. 1008-15 (Oct 2010) ISSN: 1536-4828 [Electronic] United States
PMID20442678 (Publication Type: Journal Article)
Chemical References
  • Piperidines
  • Quinazolinones
  • halofuginone
Topics
  • Animals
  • Cell Line, Tumor
  • Extracellular Matrix (physiology)
  • Fibrosis
  • Humans
  • Male
  • Mice
  • Neoplasm Transplantation
  • Pancreas (pathology)
  • Pancreatic Neoplasms (prevention & control)
  • Pancreatic Stellate Cells (drug effects, physiology)
  • Piperidines (pharmacology)
  • Quinazolinones (pharmacology)
  • Transplantation, Heterologous

Join CureHunter, for free Research Interface BASIC access!

Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease. Find out why thousands of doctors, pharma researchers and patient activists around the world use CureHunter every day.
Realize the full power of the drug-disease research graph!


Choose Username:
Email:
Password:
Verify Password:
Enter Code Shown: