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Gene expression profiling in glioblastoma and immunohistochemical evaluation of IGFBP-2 and CDC20

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Abstract

Thirty-nine glial tumours (28 glioblastomas (GB) and 11 low-grade gliomas) were investigated with DNA microarrays to reveal a possible specific gene expression profile. Unsupervised classification through hierarchical cluster analysis identified two groups of tumours, the first composed of low-grade gliomas and the second mainly composed of GB. Nine genes were identified as most informative: seven were over-expressed in low-grade gliomas and under-expressed in GB; on the contrary, two genes, insulin-like growth factor binding protein 2 (IGFBP-2) and cell division cycle 20 homologue (CDC20), were over-expressed in GB and under-expressed in low-grade tumours. This same genetic profile was confirmed by reverse transcriptase polymerase chain reaction. Immunohistochemistry for IGFBP-2 was positive in 88.8% of the cases of GB and in only one low-grade glioma, whilst CDC20 immunostained 74.1% of the cases of GB and none low-grade glioma. This was confirmed in an additional series of cases studied with immunohistochemistry only. In conclusion, over-expression of mRNA levels of IGFBP-2 and CDC20 is highly related to GB, IGFBP-2 and CDC-20 gene and protein expressions are strongly correlated, and IGFBP-2 and CDC20 immunopositivity can be useful for the identification of GB in small biopsies.

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Acknowledgment

We wish to thank Dr. M. Guizzardi for the encouragement to enter into the world of gene array. This work was presented as Presidential free paper at the 3rd Intercontinental Congress of Pathology, May 2008, Barcelona

Conflict of interest statement

We declare that we have no conflict of interest.

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Authors and Affiliations

  1. Section of Pathology, Bellaria Hospital, University of Bologna, Bologna, Italy

    Gianluca Marucci, Luca Morandi, Elisabetta Magrini, Anna Farnedi, Annalisa Pession, Maria P. Foschini & Vincenzo Eusebi

  2. Department of Medical Oncology, Bellaria Hospital, Bologna, Italy

    Enrico Franceschi

  3. Department of Statistics “Paolo Fortunati”, University of Bologna, Bologna, Italy

    Rossella Miglio & Daniela Calò

  4. Sezione di Anatomia Patologica “M. Malpighi”, Ospedale Bellaria, Via Altura 3, 40139, Bologna, Italy

    Vincenzo Eusebi

Authors
  1. Gianluca Marucci
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  2. Luca Morandi
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  3. Elisabetta Magrini
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  4. Anna Farnedi
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  5. Enrico Franceschi
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  7. Daniela Calò
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  8. Annalisa Pession
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  9. Maria P. Foschini
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  10. Vincenzo Eusebi
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Corresponding author

Correspondence to Vincenzo Eusebi.

Additional information

This work was supported by the MIUR /FISR project 1509 (202).

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Marucci, G., Morandi, L., Magrini, E. et al. Gene expression profiling in glioblastoma and immunohistochemical evaluation of IGFBP-2 and CDC20. Virchows Arch 453, 599–609 (2008). https://doi.org/10.1007/s00428-008-0685-7

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  • DOI: https://doi.org/10.1007/s00428-008-0685-7

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