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Expression of the tumor suppressor gene DCC in human gliomas
1Department of Neuropathology, Barrow Neurological Institute of St. Joseph's Hospital and Medical Center, Phoenix, Arizona 85013.
Abstract:
Reduced expression and/or allelic loss of the putative tumor suppressor gene DCC has been demonstrated in colorectal, gastric, pancreatic, esophageal, breast, and hematological malignancies. We examined the expression of the DCC gene in 22 tissue samples from human gliomas (glioblastoma multiforme, oligodendroglioma, and mixed oligodendroglioma/astrocytoma). Seven of 8 glioblastomas multiforme (88%) had reduced or absent DCC expression, and 8 of the other 14 tumors underexpressed DCC when compared to normal brain tissue. These results demonstrate that reduced expression of DCC occurs in human malignant gliomas and may be part of a common genetic pathway leading to neoplastic transformation and/or tumor progression.
Insights
Reduced expression of the DCC gene, a potential tumor suppressor, was observed in human malignant gliomas. This finding suggests DCC may play a role in glioma development and progression.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- The DCC gene, a known tumor suppressor, shows reduced expression in various cancers.
- Its role in brain tumors, specifically gliomas, remains largely unexplored.
Purpose of the Study:
- To investigate the expression levels of the DCC gene in human glioma tissues.
- To determine if DCC downregulation is associated with glioma development or progression.
Main Methods:
- Analysis of DCC gene expression in 22 human glioma tissue samples.
- Comparison of DCC expression in gliomas (glioblastoma multiforme, oligodendroglioma, mixed glioma) against normal brain tissue.
Main Results:
- Reduced or absent DCC expression was found in 88% of glioblastoma multiforme samples.
- Underexpression of DCC was observed in 8 of the remaining 14 glioma samples when compared to normal brain tissue.
Conclusions:
- Reduced DCC gene expression is a common event in human malignant gliomas.
- DCC may be involved in the common genetic pathways of neoplastic transformation and tumor progression in gliomas.