Amyloid beta-activated alpha-1-syntrophin has ramifications on Rac1 activation, ROS production and neuronal cell
Umar Mushtaq1, Rais A Ganai2, Muzamil Ahmad3
1Department of Biotechnology, University of Kashmir, Srinagar, Jammu and Kashmir, India.
The European Journal of Neuroscience
|November 15, 2024
Summary
Alzheimer's disease involves amyloid plaques and reactive oxygen species (ROS). We found alpha-1-syntrophin (SNTA1) activation by MKK6 kinase increases ROS, causing cell death, offering a new therapeutic target for Alzheimer's disease.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Alzheimer's disease (AD) is characterized by amyloid plaques and neurofibrillary tangles.
- Increased reactive oxygen species (ROS) production is an early sign of AD, but mechanisms are unclear.
- Alpha-1-syntrophin (SNTA1) regulates ROS levels in various conditions.
Purpose of the Study:
- To investigate the role of SNTA1 in Alzheimer's disease pathogenesis.
- To elucidate the mechanism of amyloid-beta (Aβ)-induced ROS production and cell death.
Main Methods:
- Utilized the IMR32 neuroblastoma cell line as an Alzheimer's disease model.
- Analyzed the expression and activation of SNTA1 and MKK6 kinase.
- Investigated the phosphorylation of SNTA1 and its interaction with Rac1.
Main Results:
- Accumulation of Aβ plaques increased SNTA1 and MKK6 kinase expression and activation.
- MKK6-mediated phosphorylation of SNTA1 created a binding site for Rac1, leading to its activation.
- Activated Rac1 resulted in excessive ROS production, causing G2/M cell cycle arrest.
Conclusions:
- MKK6-mediated SNTA1 activation promotes ROS production in neuronal cells, contributing to Aβ-mediated cell death in AD.
- This pathway provides mechanistic insight into neuronal cell death in Alzheimer's disease.
- Targeting this pathway could offer a novel strategy for reducing neuronal cell death in AD.
