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PC12 and HEL cell communication in a reconstituted synapse analyzed with mathematical modeling
Jelena Krjukova1, Vladimir Mirtov, Karl E Akerman
1Division of Cell Physiology, Department of Neuroscience, Box 572, BMC, Uppsala University, Husargatan 3, 75123 Uppsala, Sweden. elena.krukova@fysiologi.uu.se
Neurochemistry International
|November 30, 2004
Summary
This study models neuron-target cell connections using PC12 and HEL cells. Nicotine triggers calcium signals in PC12 cells, leading to delayed, oscillating calcium responses in HEL cells, correlating with neurotransmitter concentration.
Area of Science:
- Neuroscience
- Cell Biology
- Biophysics
Background:
- Synaptic transmission involves neurotransmitter release and target cell response.
- Modeling cellular communication aids understanding of neural networks.
Purpose of the Study:
- To develop and analyze a synapse model using PC12 and HEL cells.
- To investigate calcium (Ca2+) signaling dynamics in response to nicotine and neurotransmitters.
Main Methods:
- Utilized nerve growth factor (NGF)-differentiated PC12 cells and HEL cells.
- Stimulated PC12 cells with nicotine and monitored Ca2+ elevation.
- Analyzed Ca2+ signal patterns mathematically, employing bi-exponential functions and model fitting.
- Performed control experiments with noradrenaline (NA).
Main Results:
- Nicotine induced Ca2+ elevation in both PC12 and HEL cells.
- PC12 cell Ca2+ signals followed a bi-exponential function.
- Noradrenaline (NT) release from PC12 cells caused delayed, heterogeneous Ca2+ elevations in HEL cells.
- Hidden oscillations and heterogeneous Ca2+ signals in HEL cells were frequency-grouped and correlated with NT concentration.
Conclusions:
- The PC12-HEL cell model effectively simulates synaptic connections.
- Mathematical analysis revealed oscillatory dynamics in target cell responses.
- Oscillation frequency serves as a quantifiable measure linked to neurotransmitter concentration.