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Expression of autocrine motility factor mRNA is a poor prognostic factor in high-grade astrocytoma

Yoshinori Tanizaki1, Yuichi Sato, Hidehiro Oka

  • 1Department of Neurosurgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan. tanizaki@med.kitasato-u.ac.jp

Pathology International
|August 26, 2006
PubMed

Insights

Autocrine motility factor (AMF) is significantly elevated in high-grade astrocytomas, particularly glioblastomas. AMF expression is linked to shorter survival, identifying it as a poor prognostic factor in these brain tumors.

Area of Science:

  • Neuro-oncology
  • Molecular pathology
  • Cancer biomarkers

Background:

  • Tumor infiltration in astrocytomas correlates with autocrine motility factor (AMF) and its receptor gp78 expression.
  • Understanding AMF and gp78 roles is crucial for high-grade astrocytoma prognosis.

Purpose of the Study:

  • To quantify AMF and gp78 mRNA expression and localization in high-grade astrocytomas.
  • To evaluate AMF and gp78 as prognostic indicators in glioblastoma and anaplastic astrocytoma.

Main Methods:

  • In situ hybridization was used to detect AMF and gp78 mRNA in 32 glioblastomas and 23 anaplastic astrocytomas.
  • Formalin-fixed, paraffin-embedded tissue samples were analyzed.

Main Results:

  • AMF mRNA was detected in 84.4% of glioblastomas and 47.8% of anaplastic astrocytomas, with significantly higher expression in glioblastomas (P=0.0094).
  • gp78 mRNA was widely detected, but without statistical significance.
  • Patients with AMF expression showed significantly shorter overall survival in both glioblastoma (P=0.0175) and anaplastic astrocytoma (P=0.0058) cohorts.

Conclusions:

  • AMF mRNA expression is significantly higher in glioblastomas compared to anaplastic astrocytomas.
  • AMF is identified as a significant poor prognostic factor for high-grade astrocytomas.
  • Further research into AMF's role could inform therapeutic strategies for astrocytoma.

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