Related Experiment Videos
Endoplasmic reticulum Ca(2+) homeostasis and neuronal death
1The University of Manchester, School of Biological Sciences, Manchester, United Kingdom. alex.verkhratsky@man.ac.uk
Journal of Cellular and Molecular Medicine
|February 3, 2004
Summary
The endoplasmic reticulum (ER) regulates neuronal function through calcium signaling. Disrupted ER calcium homeostasis contributes to neurodegenerative diseases like Alzheimer's.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- The endoplasmic reticulum (ER) is a crucial organelle for neuronal function.
- ER calcium (Ca2+) signaling regulates diverse cellular processes.
- Dysregulation of ER Ca2+ homeostasis is implicated in neurodegenerative conditions.
Purpose of the Study:
- To elucidate the role of the ER in neuronal calcium signaling.
- To understand how ER Ca2+ fluctuations impact neuronal function and survival.
- To explore the link between altered ER Ca2+ handling and neurodegenerative disease pathogenesis.
Main Methods:
- Investigated calcium release mechanisms from the ER, including Ca(2+)-induced Ca(2+) release (CICR) and inositol-1,4,5-trisphosphate-induced Ca(2+) release (IICR).
- Examined the ER Ca(2+) store as an interconnected pool facilitating long-range signaling.
- Analyzed the impact of intra-ER Ca(2+) fluctuations on ER resident proteins and ER stress response.
Main Results:
- ER Ca(2+) release amplifies calcium entry and generates cytosolic calcium fluctuations.
- The ER functions as a unified signaling pool enabling long-range communication.
- Intra-ER Ca(2+) dynamics regulate protein folding, modification, and neuronal survival via the ER stress response.
Conclusions:
- The endoplasmic reticulum is a central regulator of neuronal calcium signaling.
- Altered ER Ca(2+) handling and homeostasis disruption are implicated in neurodegenerative diseases such as Alzheimer dementia and brain ischemia.
- Maintaining ER Ca(2+) balance is critical for neuronal health and function.