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'Humanized' mice developed at OHSU enable malaria research breakthrough at Seattle BioMed
Date:9/10/2012

PORTLAND, Ore. A novel human liver-chimeric mouse model developed at Oregon Health & Science University and Yecuris Corporation has made possible a research breakthrough at Seattle Biomedical Research Institute that will greatly accelerate studies of the most lethal forms of human malaria.

The study findings are published online in the Journal of Clinical Investigation. Study photos were selected to appear in "Scientific Show Stoppers" on the JCI blog.

Plasmodium falciparum, one of two human-specific malaria parasites, is a global health crisis, causing more than 216 million new infections annually and resulting in an estimated 655,000 deaths, according to the World Health Organization.

Sporozoites, the infectious form of the parasite, are spread to people through the bites of infected mosquitos and multiply in the human liver during the initial stages of infection. There, they undergo liver stage development, culminating in the formation and release of tens of thousands of merozoites, the parasitic phase of development that infects red blood cells.

Until now, there have been few data on human malaria liver stage biology due to the lack of a viable small animal model and because liver stage P. falciparum does not grow well in a dish. Consequently, most research and therapeutics to date have targeted the human blood stage of P. falciparum's development because it replicates well in culture.

The liver-to-blood stage of P. falciparum is the focus of this research because the parasite is virtually harmless, causing no disease symptoms, prior to its transition to the blood stage.

In this study, researchers at Seattle Biomedical Research Institute, Yecuris Corporation, Oregon Health & Science University and The Rockefeller University have demonstrated that a complete liver-to-blood stage infection of P. falciparum is possible using a unique immunocompromised mouse model
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Contact: Tamara Hargens-Bradley
hargenst@ohsu.edu
503-494-8231
Oregon Health & Science University
Source:Eurekalert  

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