Ferroptosis Signaling Pathways: Alzheimer's Disease

Area of Science:

• Biochemistry
• Cell Biology
• Neuroscience

Background:

• Alzheimer's disease (AD) pathogenesis involves iron metabolism, lipid peroxidation, and oxidative stress.
• These processes are critical regulators of ferroptosis, a unique form of regulated cell death.
• Iron is essential for lipid peroxidation, with lipoxygenases (LOXs) catalyzing the oxidation of polyunsaturated fatty acids (PUFAs).

Purpose of the Study:

• To review recent advancements in understanding ferroptosis signaling pathways.
• To explore the role of iron metabolism and lipid peroxidation in ferroptosis.
• To discuss the implications of ferroptosis in various diseases, including Alzheimer's disease.

Main Methods:

• Literature review of ferroptosis signaling pathways.
• Analysis of the role of iron, lipoxygenases (LOXs), and enzymes like ACSL4, LPCAT3, ALOXs, and POR in ferroptosis.
• Discussion of iron chelators (deferoxamine, deferiprone) as potential treatments.

Main Results:

• Iron is a key component in ferroptosis, directly involved in lipid peroxidation via LOXs.
• Enzymes such as ACSL4, LPCAT3, ALOXs, and POR promote ferroptosis by oxidizing PUFAs.
• Autophagic degradation pathways can increase iron accumulation and lipid peroxidation, exacerbating ferroptosis.

Conclusions:

• Ferroptosis is a regulated necrotic cell death pathway implicated in cancer, neurological disorders, and ischemia/reperfusion injury.
• Cerebrospinal fluid (CSF) ferritin may serve as a biomarker for brain iron levels.
• Targeting ferroptosis pathways presents a potential therapeutic strategy for AD and other diseases.