Virchows Archiv

, Volume 460, Issue 5, pp 505–513 | Cite as

HMGA2 protein expression in ovarian serous carcinoma effusions, primary tumors, and solid metastases

  • Thea Eline Hetland
  • Arild Holth
  • Janne Kærn
  • Vivi Ann Flørenes
  • Claes G. Tropé
  • Ben Davidson
Original Article

Abstract

The objective of this study was to analyze the expression and clinical role of the high mobility group AT hook (HMGA) protein in advanced-stage serous ovarian carcinoma. HMGA2 protein expression was investigated in 199 effusions and in 50 patient-matched primary tumors and solid metastases using immunohistochemistry. Results were analyzed for association with clinicopathologic parameters, including chemotherapy response, and survival. HMGA2 was expressed in tumor cells in 94.5 %, 96 %, and 90 % of specimens, respectively. There was no difference in HMGA2 expression between patient-matched samples from different anatomic sites (p > 0.3). HMGA2 expression in chemo-naïve samples was significantly higher in older patients (p = 0.006, p = 0.01, and p = 0.005 for effusions, primary tumors, and solid metastases, respectively). No association was found with residual disease volume. Furthermore, HMGA2 expression was not associated with FIGO stage (p > 0.2), except in chemo-naïve effusions (n = 106, p = 0.016). There was no difference in HMGA2 expression between chemo-naïve samples and samples obtained post-chemotherapy in effusions (p = 0.2) or primary tumors (p = 0.1). However, solid metastases obtained after chemotherapy exposure had higher HMGA2 expression compared with chemo-naïve samples (p = 0.032). HMGA2 expression was unrelated to chemotherapy response or survival. However, it was directly related to protein expression of the previously studied cancer stem cell marker Nestin (p = 0.01) and the gap junction protein claudin-7 (p = 0.02) and inversely related to the mRNA level of the E-cadherin repressor SIP1 (p = 0.02). This study provides evidence that HMGA2 is universally expressed in advanced-stage ovarian serous carcinoma irrespective of anatomic site, suggesting that HMGA2 may have a clinical role as therapeutic target.

Keywords

Ovarian carcinomas Effusions Metastasis HMGA2 Survival 

Notes

Financial acknowledgment

This work was supported by the Inger and John Fredriksen Foundation for Ovarian Cancer Research, the Norwegian Cancer Society, and the Research Foundation at the Norwegian Radium Hospital. Thea Eline Hetland is the recipient of a PhD scholarship from the Health Region South-Eastern Norway.

Conflict of interest statement

We declare that we have no conflict of interest.

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Thea Eline Hetland
    • 1
  • Arild Holth
    • 2
  • Janne Kærn
    • 1
  • Vivi Ann Flørenes
    • 2
    • 4
  • Claes G. Tropé
    • 1
    • 3
  • Ben Davidson
    • 2
    • 3
    • 5
  1. 1.Department of Gynecologic OncologyOslo University Hospital, Norwegian Radium HospitalOsloNorway
  2. 2.Division of PathologyOslo University Hospital, Norwegian Radium HospitalOsloNorway
  3. 3.Institute of Clinical Medicine, Faculty of MedicineUniversity of OsloOsloNorway
  4. 4.Faculty of Health SciencesOslo University CollegeOsloNorway
  5. 5.Division of PathologyNorwegian Radium Hospital, Oslo University HospitalOsloNorway

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