Malaria and dyserythropoiesis: a mini review

Area of Science:

• Hematology
• Immunology
• Parasitology

Background:

• Malaria-associated anemia results from red blood cell destruction and impaired erythropoiesis.
• The bone marrow niche is significantly disrupted by Plasmodium parasites.

Purpose of the Study:

• To synthesize current research into a unified mechanistic framework for malaria-induced dyserythropoiesis.
• To identify key pathways contributing to ineffective erythropoiesis in malaria.

Main Methods:

• Synthesis of in vitro, ex vivo, clinical, and postmortem studies.
• Analysis of cytokine storm effects, hemozoin-induced damage, parasite-erythroblast interactions, and macrophage remodeling.
• Highlighting omics technologies and 3-D organoids for future research.

Main Results:

• Four interlocking pathways cause dyserythropoiesis: cytokine storm (IL-6, TNF-α, IFN-γ, MIF), hemozoin-induced damage, parasite infection of erythroblasts, and macrophage-mediated niche remodeling.
• These pathways create a "developmental sanctuary" favoring parasite persistence.
• Ineffective erythropoiesis results from suppressed erythropoietin, upregulated hepcidin, GATA-1 disruption, apoptosis, and blocked differentiation.

Conclusions:

• Malaria profoundly disrupts bone marrow erythropoiesis through multiple interconnected mechanisms.
• Understanding these pathways is crucial for developing therapies targeting ineffective erythropoiesis.
• Advanced technologies like single-cell omics and organoids offer new avenues for studying parasite-host interactions and testing therapies.