Increased expression of pAKT is associated with radiation resistance in cervical cancer

Br J Cancer. 2006 Jun 5;94(11):1678-82. doi: 10.1038/sj.bjc.6603180.


Phosphorylated AKT (pAKT) is a major contributor to radioresistance in human cancers. The aim of this study was to investigate the association of pAKT expression and radiation resistance in cervical cancer. A retrospective review was made of the records of 27 women who received primary radiation therapy due to locally advanced cervical cancer (LACC) with FIGO stage IIB-IVA. Nine patients regarded as radiation resistant developed local recurrences with a median progression free interval of 9 months. Eighteen patients did not show local recurrences, and were regarded as a radiation-sensitive group. Using pretreatment paraffin-embedded tissues, we evaluated pAKT expression by immunohistochemistry. A significant association was found between the level of pAKT expression and local recurrence. Immunohistochemical staining for pAKT was significantly more frequent in the radiation-resistant than in the radiation-sensitive group (P=0.004). The mean progression-free survival was 86 months for patients with pAKT-negative staining (19 cases) and 44 months for patients with pAKT-positive expression (eight cases) (P=0.008). These results suggest that signalling from phosphatidylinositide 3-kinase/pAKT can lead to radiation resistance, and that evaluation of pAKT may be a prognostic marker for response to radiotherapy in LACC.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Disease Progression
  • Female
  • Gene Expression Regulation, Neoplastic / radiation effects
  • Humans
  • Immunohistochemistry
  • Middle Aged
  • Neoplasm Staging
  • Oncogene Protein v-akt / genetics*
  • Oncogene Protein v-akt / metabolism
  • Phosphorylation
  • Radiation Tolerance / genetics*
  • Recurrence
  • Uterine Cervical Neoplasms / genetics*
  • Uterine Cervical Neoplasms / pathology
  • Uterine Cervical Neoplasms / radiotherapy


  • Oncogene Protein v-akt