DNA repair and recombination factor Rad51 is over-expressed in human pancreatic adenocarcinoma

Oncogene. 2000 May 25;19(23):2791-5. doi: 10.1038/sj.onc.1203578.


Molecular processes that could contribute to differences in chemo- and radioresistance include variations in DNA repair mechanisms. In mammalian cells, the product of the rad51 gene mediates DNA repair via homologous recombination. We describe that in contrast to conventional monolayer cell systems Rad51 protein accumulates to high-levels in three-dimensional cell culture models as well as in orthotopic xeno-transplants of human pancreatic cancer cells. Strikingly, over-expression of wild-type Rad51 was also found in 66% of human pancreatic adenocarcinoma tissue specimens. Functional analysis revealed that Rad51 over-expression enhances survival of cells after induction of DNA double strand breaks. These data suggest that perturbations of Rad51 expression contribute to the malignant phenotype of pancreatic cancer. Oncogene (2000).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenocarcinoma / genetics*
  • Adenocarcinoma / metabolism
  • Adenocarcinoma / pathology
  • Blotting, Western
  • DNA Repair*
  • DNA-Binding Proteins / metabolism*
  • Drug Resistance, Neoplasm
  • Gene Expression Regulation, Neoplastic*
  • Humans
  • Immunohistochemistry
  • Pancreatic Neoplasms / genetics*
  • Pancreatic Neoplasms / metabolism
  • Pancreatic Neoplasms / pathology
  • Rad51 Recombinase
  • Tumor Cells, Cultured


  • DNA-Binding Proteins
  • RAD51 protein, human
  • Rad51 Recombinase