In the Lab, Low Glutathione Leaves Alzheimer's Cells Vulnerable
Graded Preliminary — experiments on human cells in a dish using several methods; no animals or people were studied.
Cell, tissue or computational study. Not evidence about people yet, which is why the grade is capped at Preliminary.
- Design
- Lab study
- Participants
- N/A
- Duration
- —
- Funding
- US National Eye Institute (NIH)
In lab cells with an Alzheimer's gene change, low glutathione triggered an iron-driven form of cell death.
Glutathione is a natural protective substance that helps cells cope with harmful oxygen compounds. Its levels can fall with age. In lab experiments, human nerve-like cells carrying an inherited Alzheimer's gene change died far more easily once their glutathione ran low. They died through ferroptosis, a kind of cell death in which iron attacks the fats in the cell's outer layer.
The cells came from a tumor cell line that resembles nerve cells. Some carried a gene variant found in families with inherited Alzheimer's. The team lowered glutathione with two drugs or by removing a gene needed to make it. Iron then built up, and fat damage rose. Drugs that bind iron or block this type of cell death saved the cells. Small clumps of the Alzheimer's protein beta-amyloid had a similar effect.
At the same time, a targeted recycling route inside the cell became more active, and levels of GPX4, an enzyme that guards against fat damage, dropped. Slowing this recycling kept more cells alive. The authors call this a possible link. All of it happened in a dish; whether the same happens in the human brain was not tested.
Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.