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Gangliosides protect from TNF alpha-induced apoptosis
T Koike1, K Fehsel, J Zielasek
1Diabetes Research Institute, University of Düsseldorf, Germany.
Immunology Letters
|March 1, 1993
Summary
Gangliosides, specifically bovine brain gangliosides (BBG), inhibit tumor necrosis factor alpha (TNF alpha)-mediated cancer cell death. BBG treatment significantly reduced DNA damage and protected cells from TNF alpha-induced apoptosis.
Area of Science:
- Immunology
- Cell Biology
- Biochemistry
Background:
- Tumor necrosis factor alpha (TNF alpha) is a key cytokine involved in inflammatory responses and apoptosis.
- TNF alpha-mediated cytotoxicity is a critical mechanism in cancer therapy.
- Gangliosides are complex glycosphingolipids found on cell surfaces, implicated in various cellular processes.
Purpose of the Study:
- To investigate the effect of gangliosides on TNF alpha-induced cytotoxicity in cancer cells.
- To determine the mechanism by which gangliosides modulate TNF alpha sensitivity.
Main Methods:
- Incubation of L929 fibrosarcoma cells with recombinant TNF alpha.
- Treatment with a bovine brain ganglioside mixture (BBG).
- Assessment of cell lysis and DNA-strand breaks using in situ nick translation.
Main Results:
- TNF alpha treatment led to significant lysis of L929 cells (65.2%-78.0%).
- BBG inhibited TNF alpha-mediated lysis in a dose-dependent manner, with maximum inhibition at 2 mg/ml.
- BBG significantly reduced TNF alpha-induced DNA-strand breaks, indicating protection against apoptosis.
Conclusions:
- Bovine brain gangliosides (BBG) effectively inhibit the cytotoxic effects of TNF alpha on tumor cells.
- Gangliosides may exert their protective effect by interfering with intracellular signal transduction pathways, including the activation of DNA-cleaving endonucleases.
- These findings suggest a potential therapeutic role for gangliosides in modulating TNF alpha-based cancer treatments.