# Ferrostatin-1 alleviates experimental cerebral malaria by regulating immune cell functions and brain endothelial ferroptosis

## TL;DR

Ferrostatin-1 helps treat cerebral malaria by balancing immune responses and protecting the brain's blood barrier.

## Contribution

The study introduces a novel strategy targeting ferroptosis to treat cerebral malaria.

## Key findings

- Ferrostatin-1 reduces parasitemia and improves blood-brain barrier integrity in a cerebral malaria model.
- Ferrostatin-1 modulates immune cell functions and inhibits brain endothelial ferroptosis.
- The compound extends survival and alleviates neurological symptoms in infected mice.

## Abstract

Cerebral malaria (CM), a life-threatening complication of Plasmodium falciparum infection, is characterized by dysregulated immune responses and blood-brain barrier (BBB) damage. In this study, we found that iron metabolic disorders occurred in the spleen and brain tissues in response to Plasmodium berghei ANKA (PbA) infection in a murine CM model. PbA infection promoted lipid peroxidation and induced ferroptosis, manifested as the accumulation of iron ion, elevation of reactive oxygen species and lipid peroxide, upregulated expression of the ferroptosis-related protein TFRC and ACSL4, and downregulated expression of SLC7A11 and GPX4. Ferrostatin-1 (Fer-1), is widely used as a reference compound as a synthetic radical-trapping antioxidant, which inhibits ferroptosis by suppressing lipid peroxide formation. Intervention with Fer-1 ameliorated iron metabolic disorders, reduced lipid peroxidation, decreased parasitemia, extended survival time, alleviated neurological symptoms, and improved BBB integrity. Mechanistically, Fer-1 exerted dual-axis regulation: firstly, enhancing the antigen-presenting capacity of dendritic cells (DCs) by upregulating MHC II, CD80/86, promoting M1 polarization of macrophages, modulating CD4+ T cell responses to increase IFN-γ+ Th1 cells and Treg cell proportions for balancing pro-inflammatory and anti-inflammatory reactions; secondly inhibiting ferroptosis in brain microvascular endothelial cells, downregulating chemokines CXCL9/CXCL10 and adhesion molecules ICAM-1/VCAM-1, and reducing cerebral infiltration of CD8+ T cells. Our study confirms that Fer-1 alleviates ECM pathological progression through dual mechanisms "immune activation-endothelial protection", providing a novel ferroptosis-targeted strategy for CM prevention and treatment.

Image 1

•Plasmodium
berghei ANKA infection triggers ferroptosis in the spleen and brain of an experimental cerebral malaria model.•Ferrostatin-1 prevents cerebral malaria by reducing parasitemia and preserving blood-brain barrier integrity.•Ferrostatin-1 functions through a dual mechanism by modulating peripheral immune cells and protecting the brain endothelium.

Plasmodium
berghei ANKA infection triggers ferroptosis in the spleen and brain of an experimental cerebral malaria model.

Ferrostatin-1 prevents cerebral malaria by reducing parasitemia and preserving blood-brain barrier integrity.

Ferrostatin-1 functions through a dual mechanism by modulating peripheral immune cells and protecting the brain endothelium.