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Decrease in Fas-induced apoptosis by the γ-secretase inhibitor is dependent on p75(NTR) in a glioblastoma cell line
Barbara Bessette1, Karine Durand, Stéphanie Giraud
1University of Limoges, EA3842, 'Cellular Homeostasis and Pathology', Faculty of Medicine, 87025 Limoges Cedex;
Experimental and Therapeutic Medicine
|September 13, 2012
Summary
The p75(NTR) receptor and gamma-secretase are involved in glioblastoma cell death signaling. Inhibiting gamma-secretase affects Fas-induced apoptosis, suggesting their interaction in cell survival pathways.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- p75 neurotrophin receptor (p75(NTR)) is a TNF superfamily member involved in cell survival and apoptosis.
- p75(NTR) signaling pathways, particularly gamma-secretase cleavage, are not fully understood.
- Fas receptor activation induces apoptosis in various cell lines.
Purpose of the Study:
- To investigate the roles of p75(NTR) and Notch in resistance to Fas-induced apoptosis in U-87 MG glioblastoma cells.
- To explore the modulation of Fas-induced apoptosis by gamma-secretase inhibition in relation to p75(NTR)-Fas receptor interaction.
Main Methods:
- Utilized U-87 MG glioblastoma cell line.
- Administered a gamma-secretase inhibitor.
- Assessed Fas receptor expression and Fas-induced apoptosis.
- Investigated p75(NTR)-Fas receptor interaction in cell death signaling.
Main Results:
- U-87 MG cells express Fas receptor on the cell membrane.
- Gamma-secretase inhibition decreased Fas-induced apoptosis.
- These findings suggest a role for gamma-secretase in p75(NTR) and Fas interaction.
Conclusions:
- Gamma-secretase activity is implicated in the p75(NTR) and Fas-mediated cell death signaling pathway.
- The interaction between p75(NTR) and Fas receptor, modulated by gamma-secretase, influences glioblastoma cell apoptosis.
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