Related Experiment Video
Updated: May 20, 2026
Interactions with and Membrane Permeabilization of Brain Mitochondria by Amyloid Fibrils
Published on: September 28, 2019
Mitochondrial ferritin attenuates β-amyloid-induced neurotoxicity: reduction in oxidative damage through the Erk/P38
Wen-Shuang Wu1, Ya-Shuo Zhao, Zhen-Hua Shi
1Laboratory of Molecular Iron Metabolism, College of Life Science, Hebei Normal University, Shijiazhuang, People's Republic of China.
Aims:
Mitochondrial ferritin (MtFt), which was recently discovered, plays an important role in preventing neuronal damage in 6-hydroxydopamine-induced Parkinsonism by maintaining mitochondrial iron homeostasis. Disruption of iron regulation also plays a key role in the etiology of Alzheimer's disease (AD). To explore the potential neuroprotective roles of MtFt, rats and cells were treated with Aβ(25-35) to establish an AD model.
Results:
We report that knockdown of MtFt expression significantly enhanced Aβ(25-35)-induced neurotoxicity as shown by dysregulation of iron homeostasis, enhanced oxidative stress, and increased cell apoptosis. Opposite results were obtained when MtFt was overexpressed in SH-SY5Y cells prior to treatment with Aβ(25-35). Further, MtFt inhibited Aβ(25-35)-induced P38 mitogen-activated protein kinase and activated extracellular signal-regulated kinase (Erk) signaling.
Innovation:
MtFt attenuated Aβ(25-35)-induced neurotoxicity and reduced oxidative damage through Erk/P38 kinase signaling.
Conclusion:
Our results show a protective role of MtFt in AD and suggest that regulation of MtFt expression in neuronal cells may provide a new neuroprotective strategy for AD.
Insights
Mitochondrial ferritin (MtFt) protects neurons from Alzheimer's disease (AD) pathology. Upregulating MtFt reduces iron dysregulation, oxidative stress, and cell death, offering a potential new AD treatment strategy.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Mitochondrial ferritin (MtFt) is crucial for preventing neuronal damage by maintaining mitochondrial iron homeostasis.
- Disruptions in iron regulation are implicated in the development of Alzheimer's disease (AD).
Purpose of the Study:
- To investigate the neuroprotective potential of MtFt in an Alzheimer's disease model.
- To explore MtFt's role in mitigating amyloid-beta (Aβ) induced neurotoxicity.
Main Methods:
- An Alzheimer's disease model was established using Aβ(25-35) treatment in rats and neuronal cells.
- Mitochondrial ferritin (MtFt) expression was manipulated (knockdown and overexpression) in neuronal models.
- Key signaling pathways, including Erk and P38 kinase, were analyzed.
Main Results:
- Knockdown of MtFt exacerbated Aβ(25-35)-induced neurotoxicity, characterized by iron dysregulation, oxidative stress, and apoptosis.
- Overexpression of MtFt in SH-SY5Y cells prior to Aβ(25-35) treatment yielded protective effects.
- MtFt inhibited P38 mitogen-activated protein kinase and activated extracellular signal-regulated kinase (Erk) signaling in response to Aβ(25-35).
Conclusions:
- Mitochondrial ferritin (MtFt) demonstrates a significant neuroprotective role in Alzheimer's disease.
- Modulating MtFt expression in neuronal cells presents a promising therapeutic strategy for AD.
