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Updated: Jul 20, 2026
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Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology
Published on: March 23, 2011
Modulation of neuronal [Ca2+]i by caffeine is altered with aging
Waleed B Alshuaib1, Susan P Cherian, Mohamed Y Hasan
1Department of Physiology, Faculty of Medicine, Kuwait University, PO Box 24923, Safat 13110, Kuwait. waleeds@hsc.edu.kw
Summary
Caffeine affects intracellular calcium concentration ([Ca2+]i) in young neurons but not in aged neurons. This suggests aging compromises caffeine's role in modulating neuronal function via calcium signaling.
Area of Science:
- Neuroscience
- Cellular Physiology
Background:
- Voltage-dependent calcium channels are crucial for neuronal excitability and synaptic transmission.
- Intracellular calcium concentration ([Ca2+]i) fluctuations significantly impact neuronal functions.
Purpose of the Study:
- To investigate the effects of caffeine on [Ca2+]i in hippocampal CA1 neurons from young and aged mice.
- To determine if aging alters caffeine's modulation of [Ca2+]i.
Main Methods:
- Fura 2-AM fluorescence photometry was employed to measure [Ca2+]i.
- Experiments were conducted on CA1 hippocampal neurons from young (2 months) and old (24 months) C57BL mice.
- Neurons were stimulated with KCl (26 mM) in the presence and absence of 100 microM caffeine.
Main Results:
- Caffeine significantly enhanced peak [Ca2+]i in young mice (control: 325+/-8 nM, caffeine: 402+/-10 nM).
- Caffeine had no significant effect on peak [Ca2+]i in old mice (control: 222+/-6 nM, caffeine: 223+/-7 nM).
Conclusions:
- Caffeine modulates neuronal function by altering [Ca2+]i.
- The ability of caffeine to modulate [Ca2+]i is diminished in aged neurons, indicating a compromised role with aging.
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