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Proliferation and cell death in oligodendrogliomas
S B Wharton1, F A Hamilton, W K Chan
1Department of Histopathology, Addenbrooke's Hospital, Cambridge, UK.
Neuropathology and Applied Neurobiology
|April 29, 1998
Summary
Tumour growth is influenced by cell proliferation and apoptosis. In oligodendrogliomas, higher proliferation (LI) correlated with tumour grade, but apoptosis (TI) did not significantly differ between grades, suggesting apoptosis impacts overall tumour growth.
Area of Science:
- Neuro-oncology
- Cancer biology
- Pathology
Background:
- Tumour growth rate is determined by the balance between cell proliferation and cell loss (apoptosis).
- Understanding these processes in oligodendrogliomas is crucial for predicting tumour progression.
Purpose of the Study:
- To investigate the relationship between proliferation and apoptosis in oligodendrogliomas.
- To assess the correlation of these indices with tumour grade and patient survival.
Main Methods:
- Analysis of 32 oligodendroglioma cases (grades II and III) over a 10-year period.
- Quantification of mitotic index (MI), apoptotic index (AI), MIB1 labelling index (LI), and TUNEL index (TI).
- Correlation analysis between indices and survival data using Kaplan-Meier curves.
Main Results:
- Grade III oligodendrogliomas showed a significantly higher labelling index (LI) than grade II.
- A significant positive correlation was found between the TUNEL index (TI) and labelling index (LI).
- Histological grade significantly impacted survival, but LI and apoptotic indices alone did not predict survival outcomes.
Conclusions:
- A positive relationship exists between proliferation and apoptosis in oligodendrogliomas.
- Apoptosis appears to play a significant role in influencing the overall growth rate of these brain tumours.
- While proliferation correlates with grade, apoptosis's role in survival requires further investigation.