Eosinophil intracellular signalling: apoptosis
Pinja Ilmarinen1, Eeva Moilanen, Hannu Kankaanranta
1The Immunopharmacology Research Group, University of Tampere School of Medicine and Tampere University Hospital, Tampere, Finland, pinja.ilmarinen@uta.fi.
Methods in Molecular Biology (Clifton, N.J.)
|July 3, 2014
Summary
Investigating eosinophil apoptosis mechanisms in asthma is key for resolving airway inflammation. This study presents methods to analyze mitochondrial function and caspase activation, crucial for understanding eosinophil cell death.
Area of Science:
- Immunology
- Cell Biology
- Respiratory Medicine
Background:
- Eosinophil apoptosis is vital for resolving eosinophilic inflammation in asthma.
- Apoptosis can be triggered by extrinsic or intrinsic pathways, both activating caspases.
- Understanding these pathways is crucial for developing asthma treatments.
Purpose of the Study:
- To describe reliable methods for investigating intracellular mechanisms of eosinophil apoptosis.
- To assess mitochondrial membrane potential and effector caspase activation in eosinophils.
Main Methods:
- Eosinophil staining with JC-1 fluorescent probe and flow cytometry to measure mitochondrial membrane potential (∆Ψm).
- Immunoblotting to detect degradation of lamin A/C, a substrate of effector caspase-6.
Main Results:
- JC-1 staining and flow cytometry reliably indicate mitochondrial dysfunction and apoptosis.
- Assessment of lamin A/C degradation effectively explores effector caspase-6 activation.
Conclusions:
- These methods provide robust tools for studying eosinophil apoptosis.
- Further research into these mechanisms can inform therapeutic strategies for asthma.
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