Experimental models of liver-stage malaria: Progress, gaps, and challenges

Area of Science:

• Parasitology
• Cell Biology
• Drug Discovery

Background:

• Malaria eradication is a persistent global health challenge.
• Plasmodium parasites, particularly Plasmodium vivax, exhibit a complex lifecycle involving a dormant liver stage (hypnozoites) crucial for relapse.
• Current treatments for liver-stage malaria pose risks for individuals with glucose-6-phosphate dehydrogenase deficiency, necessitating novel therapeutic approaches.

Purpose of the Study:

• To review the limitations of existing in vitro models for studying liver-stage malaria.
• To explore the potential of organoid technology to overcome these limitations.
• To guide the development of improved experimental platforms for antimalarial drug discovery targeting the liver stage.

Main Methods:

• Literature review of current experimental platforms for studying liver-stage malaria.
• Analysis of the strengths and weaknesses of existing in vitro models.
• Discussion of organoid technology as an advanced cell culture method.

Main Results:

• Existing in vitro models for liver-stage malaria have limitations in accurately replicating the human liver environment.
• Organoids, as 3D self-organizing structures, offer a more physiologically relevant platform.
• Organoid technology has the potential to significantly improve the study of intrahepatic parasite development and drug efficacy.

Conclusions:

• Targeting the liver stage of the malaria parasite lifecycle is critical for eradication and preventing relapse.
• Organoid technology represents a significant advancement for developing more accurate in vitro models of liver-stage malaria.
• Improved liver-stage models are essential for the development of novel preventive strategies and radical cures for malaria.