Plasmodium Liver Stage Biology and Host Interaction

Malaria parasites of the genus Plasmodium initiate infection by injecting sporozoites into the skin, which migrate via the bloodstream to the liver and invade hepatocytes. Within the protective environment of a parasitophorous vacuole, each sporozoite undergoes extensive growth and asynchronous rounds of nuclear division, producing tens of thousands of merozoites without causing immediate symptoms. Throughout this phase, the parasite remodels host metabolic pathways—particularly lipid and nutrient transport—and manipulates cell-intrinsic immune defences, including apoptosis and autophagy-like mechanisms. On maturation, merozoites are packaged into membrane-bound merosomes that bud from infected hepatocytes, traverse the liver sinusoids and release infective forms into the bloodstream. Insights into the spatial organisation of infected tissue, the dynamics of host-cell transcriptional responses and the molecular crosstalk at the parasitophorous vacuole membrane have illuminated key steps in parasite development, immune evasion and nutrient acquisition. Understanding this silent but crucial phase holds promise for novel prophylactic interventions and liver-stage vaccine design.

Research from Nature Portfolio

Recent studies employing spatial transcriptomics combined with single-nuclei RNA sequencing in a murine model have delineated the heterogeneity of host responses across lobular zones during Plasmodium berghei infection. These analyses reveal focal alterations in lipid metabolism around parasite-occupied hepatocytes, distinct inflammatory programmes that give rise to defined ‘hotspots’ of immune cell accumulation, and a delayed but measurable response to mosquito salivary gland components in uninfected control livers. This work establishes an experimental benchmark for in vivo interrogation of liver stage biology, offering a high-resolution atlas of gene expression changes that can underpin the discovery and validation of targeted intervention strategies.

Plasmodium Liver Stage Biology and Host Interaction publication trend

The graph below shows the total number of articles in plasmodium liver stage biology and host interaction across all publications each year (not limited to Nature Index journals).

Technical terms

Sporozoite: The motile, infective form of Plasmodium transmitted by mosquitoes that initiates liver infection.

Hepatocyte: A liver parenchymal cell that supports intracellular growth of Plasmodium during the liver stage.

Parasitophorous vacuole membrane (PVM): A specialised host-derived compartment membrane that encloses the parasite and mediates nutrient and signal exchange.

Merozoite: The invasive daughter form released from hepatocytes or erythrocytes that initiates the blood stage of infection.

Merosome: A host-cell-derived vesicle containing multiple merozoites that facilitates safe transit from the liver to the bloodstream.

References

1. Host-pathogen interactions in the Plasmodium-infected mouse liver at spatial and single-cell resolution. Nature Communications (2024).
2. Same, same but different: Exploring Plasmodium cell division during liver stage development. PLOS Pathogens (2023).
3. The nutrient games – Plasmodium metabolism during hepatic development. Trends in Parasitology (2023).
4. Host cell cytosolic immune response during Plasmodium liver stage development. FEMS Microbiology Reviews (2018).
5. Release of Hepatic Plasmodium yoelii Merozoites into the Pulmonary Microvasculature. PLOS Pathogens (2007).
6. Plasmodium parasite exploits host aquaporin-3 during liver stage malaria infection. PLOS Pathogens (2018).