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Scripps Research scientist wins $1.9 million grant to study malaria
Date:6/9/2011

A scientist from The Scripps Research Institute has won a four-year, $1.9 million grant from the National Institutes of Health to better understand the parasite that causes malaria, laying the groundwork to develop better drugs to combat the widespread and deadly disease.

"Many antimalarial drugs alleviate symptoms, but do not necessarily result in a complete cure because some malaria parasites are able to persist asymptomatically in the liver for months or years," said Scripps Research Professor Elizabeth Winzeler, who is principal investigator for the new grant. "We hope to find new targets that are critical to the liver stages as well as the blood stages with the long-term aim of designing better drugs."

A Complicated Lifecycle

Malaria is a nasty and often fatal disease, affecting about 250 million people every year in Africa, Asia, and the Americas, according to the World Health Organization (WHO). Each year, more than 1 million people die of malaria, mostly children under the age of five. While significant strides had been made in curtailing the disease, for the last two decades malaria, has again been on the rise due to the emergence of drug-resistant parasites.

The parasite Plasmodium, which causes malaria, has a complicated lifecycle in two hostsmosquitoes and humans (or other vertebrate). When a malaria-infected mosquito feeds on a person, the parasite enters the human body. Within 30 minutes, the parasite has infected liver cells, where it remains anywhere from eight days to several months without causing noticeable symptoms.

When this period is over, however, the parasite (now in a different form) leaves the liver and enters red blood cells, where it grows and multiplies. When the infected red blood cells eventually burst, the parasite and Plasmodium toxins are released into the bloodstream, and the person feels sick. Symptoms include fever, chills, headache, and other flulike symptoms; in severe
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Contact: Mika Ono
mikaono@scripps.edu
858-784-2052
Scripps Research Institute
Source:Eurekalert

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