Overview of Sigma-1R Subcellular Specific Biological Functions and Role in Neuroprotection.
Véronik Lachance1,2, Sara-Maude Bélanger1,2, Célia Hay1,2
1Département des Sciences Biologiques, Université du Québec à Montréal, 141 Avenue du Président-Kennedy, Montréal, QC H2X 3X8, Canada.
International Journal of Molecular Sciences
|February 11, 2023
Summary
Sigma-1R (S1R) protein is crucial for cellular balance and neuroprotection. Targeting S1R
Area of Science:
- Cellular Biology
- Neuroscience
- Biochemistry
Background:
- Sigma-1R (S1R) protein is essential for cellular homeostasis, regulating calcium and lipid exchange.
- S1R's roles in endoplasmic reticulum (ER) stress response and autophagy are linked to neuroprotective effects.
- S1R modulation shows therapeutic potential for neurodegenerative diseases.
Purpose of the Study:
- To review the subcellular localization of Sigma-1R (S1R).
- To describe S1R's biological activities in specific cellular compartments.
- To elucidate the role of S1R dysregulation in neurodegenerative diseases.
Main Methods:
- Literature review focusing on S1R subcellular localization.
- Analysis of S1R's biological functions within Mitochondrion-Associated ER Membrane (MAM), ER-Lipid Droplet (ER-LD), ER-Plasma Membrane (ER-PM), and Nuclear Envelope (NE).
- Discussion of cellular mechanisms and binding partners involved in S1R pathways.
Main Results:
- S1R is localized to critical interfaces including MAM, ER-LD, ER-PM, and NE.
- S1R modulates key cellular processes like calcium/lipid exchange and ER stress.
- Dysregulation of S1R-associated pathways contributes to neurodegeneration.
Conclusions:
- Understanding S1R's compartmentalized functions is key to its therapeutic potential.
- S1R's role in cellular interfaces offers insights into neurodegenerative disease mechanisms.
- Further research into S1R binding partners may reveal novel therapeutic targets.
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