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Updated: Jan 15, 2026
Neuromodulation and Mitochondrial Transport: Live Imaging in Hippocampal Neurons over Long Durations
Published on: June 17, 2011
Modulation of Mitochondrial Dynamics in Primary Hippocampal Cultures of 5xFAD Mice by Mdivi-1, MFP, and Exogenous
Alina Chaplygina1, Daria Zhdanova1
1Institute of Cell Biophysics, Russian Academy of Sciences-a Separate Division of Federal Research Center Pushchino Research Center for Biological Studies, Russian Academy of Sciences (ICB RAS), 142290 Pushchino, Russia.
Background:
Mitochondrial dynamics-the balance between fission, fusion, and mitophagy-are essential for maintaining cellular homeostasis and are increasingly implicated in the pathogenesis of Alzheimer's disease (AD).
Methods:
Here, we investigated the effects of targeted modulation of mitochondrial fission and fusion on mitochondrial morphology and metabolic status in primary hippocampal cultures derived from 5xFAD transgenic mice. Mitochondrial dynamics were modulated using the fission inhibitor Mitochondrial Division Inhibitor 1 (Mdivi-1), the fusion promoter mitochondrial fusion promoter M1 (MFP M1), and exogenous zinc as a fission activator. We evaluated mitochondrial morphology, lipofuscin accumulation, beta-amyloid (Aβ42) levels, and reactive oxygen species (ROS). The general condition of the cultures was assessed morphologically using neuronal and astrocytic markers.
Results:
Modulating mitochondrial dynamics altered mitochondrial morphology, decreased Aβ42, lipofuscin, and ROS levels, and improved cellular organization. Treatments with MFP and Mdivi-1 promoted mitochondrial hyperfusion without complete network integration and were associated with reduced astrogliosis and increased neuronal density. In contrast, zinc induced dose-dependent mitochondrial fragmentation and astrocytic clasmatodendrosis, with lower concentrations enhancing Aβ clearance and higher concentrations inducing toxicity.
Conclusions:
Mitochondrial fusion and fission significantly influence lipofuscin and amyloid accumulation in 5xFAD cultures, underscoring their potential as therapeutic targets in neurodegenerative diseases. We propose that mitochondrial morphology acts as a key regulator of both cellular homeostasis and disease pathology.
Insights
Modulating mitochondrial dynamics, like fission and fusion, impacts Alzheimer
Area of Science:
- Cellular Biology
- Neuroscience
- Mitochondrial Biology
Background:
- Mitochondrial dynamics (fission, fusion, mitophagy) are crucial for cellular health.
- Dysregulated mitochondrial dynamics are linked to Alzheimer's disease (AD) pathogenesis.
Purpose of the Study:
- To investigate how modulating mitochondrial fission and fusion affects mitochondrial morphology and metabolic status.
- To assess these effects in primary hippocampal cultures from 5xFAD transgenic mice, a model for AD.
Main Methods:
- Utilized Mdivi-1 (fission inhibitor) and MFP M1 (fusion promoter) to alter mitochondrial dynamics.
- Employed exogenous zinc as a fission activator.
- Evaluated mitochondrial morphology, lipofuscin, beta-amyloid (Aβ42), and reactive oxygen species (ROS) levels.
Main Results:
- Modulation of mitochondrial dynamics altered morphology, reduced Aβ42, lipofuscin, and ROS.
- MFP M1 and Mdivi-1 treatments promoted mitochondrial hyperfusion, decreased astrogliosis, and increased neuronal density.
- Zinc induced dose-dependent fragmentation; lower doses aided Aβ clearance, higher doses caused toxicity.
Conclusions:
- Mitochondrial fusion and fission dynamics significantly impact amyloid and lipofuscin accumulation in AD models.
- Targeting mitochondrial morphology presents a potential therapeutic strategy for neurodegenerative diseases.
- Mitochondrial morphology is a key regulator of cellular homeostasis and disease progression.
