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09:39
Quantitative Immunofluorescence Assay to Measure the Variation in Protein Levels at Centrosomes
Published on: December 20, 2014
Apaf1 plays a pro-survival role by regulating centrosome morphology and function
Elisabetta Ferraro1, Maria Grazia Pesaresi, Daniela De Zio
1Laboratory of Molecular Neuroembryology, IRCCS Fondazione Santa Lucia, 00143, Rome, Italy.
Journal of Cell Science
|October 11, 2011
Summary
Apoptotic protease activating factor 1 (Apaf1) regulates centrosome maturation, impacting cell division and stress response. Loss of Apaf1 causes defects, making cells more fragile and sensitive to stress.
Area of Science:
- Cell Biology
- Molecular Biology
- Apoptosis Research
Background:
- Apoptotic protease activating factor 1 (Apaf1) is central to the apoptosome and intrinsic apoptosis.
- Its role beyond apoptosis, particularly in cell cycle regulation, is less understood.
Purpose of the Study:
- To investigate the non-apoptotic functions of Apaf1 in cellular processes.
- To elucidate Apaf1's role in centrosome maturation and its impact on cell viability.
Main Methods:
- Analysis of Apaf1-depleted cells to observe phenotypic changes.
- Assessment of centrosome function, microtubule nucleation, and cytoskeleton organization.
- Evaluation of cell fragility, stress response, and protein expression (Bcl-2, Bcl-X(L)).
- Investigation of Apaf1 interaction with HCA66 at the centrosome.
Main Results:
- Apaf1 depletion leads to centrosome defects, impairing microtubule nucleation and cytoskeleton organization.
- Loss of Apaf1 disrupts mitotic spindle formation, cell migration, and mitochondrial network.
- Apaf1-depleted cells exhibit increased fragility, lower Bcl-2/Bcl-X(L) expression, and rapid cytochrome c release.
- Apaf1 regulates HCA66 recruitment to the centrosome, independent of its apoptotic function.
Conclusions:
- Apaf1 plays a critical role in centrosome maturation and cell structural integrity.
- Apaf1 functions as a pro-survival molecule by maintaining cellular performance and stress resilience.
- Dysregulation of Apaf1 compromises cell viability and increases susceptibility to stress.
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