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Human brain tumor--derived cell lines: growth rate reduced by human fibroblast interferon
Abstract:
The biological response modifier human beta-interferon had pronounced antigrowth effects on various histologic types of human brain tumor cells but no effects on a nontransformed cell line, MRC-5. The cultures of brain tumor cells showed severe alterations indicative of cell injury and death after exposure to beta-interferon for 2 to 6 days. Similar results were obtained with cells freshly explanted from human brain tumors. The results indicate that it may be possible to use fresh, explanted tumor tissue to identify patients who might benefit from therapy with beta-interferon.
Insights
Human beta-interferon demonstrated significant antigrowth effects on human brain tumor cells, causing cell injury and death. This suggests explanted tumor tissue could identify patients suitable for beta-interferon therapy.
Area of Science:
- Neuro-oncology
- Immunology
- Cell Biology
Background:
- Biological response modifiers like human beta-interferon are investigated for therapeutic potential.
- Brain tumors exhibit diverse histological types and cellular behaviors.
Purpose of the Study:
- To evaluate the antigrowth effects of human beta-interferon on various human brain tumor cells.
- To determine if human beta-interferon has differential effects on tumor cells versus normal cells.
- To explore the utility of explanted tumor tissue for predicting treatment response.
Main Methods:
- Exposure of cultured human brain tumor cells and a normal cell line (MRC-5) to human beta-interferon.
- Observation of cellular alterations, injury, and death over 2 to 6 days.
- Testing of freshly explanted human brain tumor tissues.
Main Results:
- Human beta-interferon exhibited pronounced antigrowth effects on multiple histologic types of human brain tumor cells.
- No significant effects were observed on the nontransformed MRC-5 cell line.
- Severe alterations, cell injury, and death were noted in tumor cell cultures post-exposure.
- Similar antigrowth effects were observed in freshly explanted tumor tissues.
Conclusions:
- Human beta-interferon possesses significant cytotoxic and cytostatic effects against human brain tumor cells in vitro.
- The differential sensitivity of tumor cells suggests a potential therapeutic window.
- Freshly explanted tumor tissue can serve as a predictive model for identifying patients who may benefit from beta-interferon therapy.