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CD95-Mediated Calcium Signaling
Mehdi Hammadi1, Vanessa Delcroix1, Anne-Marie Vacher1
1INSERM U1218, 229 COURS DE L'ARGONNE, CS 61283, 33076, Bordeaux Cedex, France.
Methods in Molecular Biology (Clifton, N.J.)
|January 13, 2017
Summary
CD95 engagement triggers distinct intracellular calcium signals that determine cell fate. Measuring these calcium signals using fluorescence microscopy requires careful methodological considerations for accurate results.
Area of Science:
- Cell Biology
- Signaling Pathways
- Apoptosis Research
Background:
- Intracellular calcium (Ca2+) signals are critical regulators of cellular functions, including cell survival and apoptosis.
- CD95 (also known as Fas receptor) engagement by its ligands initiates signaling cascades that influence cell fate.
- The type of CD95 ligand (membrane-bound or soluble) dictates the resulting calcium signal and subsequent cellular outcome (apoptosis or survival).
Purpose of the Study:
- To highlight the importance of intracellular calcium signals in mediating CD95-mediated cell fate decisions.
- To underscore the utility of intracellular calcium determination as a method for dissecting CD95 signaling mechanisms.
- To provide guidance on the technical considerations and precautions necessary when studying calcium signaling pathways.
Main Methods:
- Utilizing fluorescent indicators for the detection of intracellular calcium.
- Employing fluorescence microscopy for imaging calcium dynamics.
- Discussing the methodological challenges and necessary precautions for accurate calcium signal measurement.
Main Results:
- CD95 engagement generates specific intracellular calcium signal patterns.
- These distinct calcium signals correlate with differential cell fate outcomes (apoptosis vs. survival).
- Fluorescence-based methods are widely applied but demand meticulous experimental control.
Conclusions:
- Intracellular calcium signaling is a key determinant of cell fate following CD95 engagement.
- Accurate measurement of calcium signals provides critical insights into CD95 pathway molecular mechanisms.
- Careful adherence to methodological precautions is essential for reliable results when using fluorescence microscopy to study calcium signaling.
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