Novel anti-malarial drug candidate found by UT Southwestern researchers in multicenter study

“Malaria remains one of the most globally significant infectious diseases that we face,” said Dr. Margaret Phillips, professor of pharmacology at UT Southwestern and one of the senior authors of the study, which appears in the May 20 issue of Nature. Malaria affects about 40 percent of the world’s population and kills about a million people a year, she said. The parasite that causes the disease is spread by mosquito bites.

Researchers, including Dr. Margaret Phillips (right) and Farah El Mazouni, have collaborated to identify a series of chemical compounds that might serve as starting points for new classes of anti-malarial drugs. Drugs are the mainstay of malaria treatment, yet the parasite is notorious for developing drug resistance, which compromises current therapy.

Drugs are the mainstay of malaria treatment, yet the malaria parasite is notorious for developing drug resistance, which compromises current chemotherapy.

“Novel chemical compounds with anti-malarial activity represent a potent tool in the process of developing new drugs to treat this disease,” Dr. Phillips said.

The study, done in collaboration with Dr. Kiplin Guy of St. Jude Children’s Research Hospital in Memphis and other researchers, started with a “library” of 309,474 chemical compounds.

The researchers used a technique called high throughput screening, which allowed them to test thousands of compounds quickly to identify those with anti-malarial action.

“In addition, publishing the full set of identified compounds will maximize the chances for the most-promising candidates to move into large-scale drug development programs,” Dr. Phillips said.

The screen identified 1,152 compounds that killed the parasite. The researchers then followed up with further tests to determine the mechanism of action of the identified compounds, where possible.

Dr. Phillips and her group tested whether any of the identified compounds killed malaria parasites by inhibiting an enzyme necessary to make pyrimidine, an intermediate molecule for creating DNA. She discovered that three of the library’s compounds with anti-malarial activity blocked this enzyme. Two of those had similar chemical structures to a class of known compounds that she and her colleagues have been studying for possible drug development. The third compound previously was not known to target the enzyme.

“It looked very different from anything we knew about before,” she said.

Having a variety of anti-malarial drugs with different chemical structures and modes of action is important because different types of drugs are given together to slow the parasite from developing resistance, Dr. Phillips said.

In all, the researchers from the various centers found 172 compounds that are “reasonable starting points” for development of new types of drugs.

“We call the identified candidates ‘hits,’ but if any of them are going to become drugs, they’re going to have to undergo chemical modification,” Dr. Phillips said. “For instance, they may need to be altered chemically to enter the cell more easily, or to improve their pharmacology so they will be more effective in people.”

Farah El Mazouni, senior research associate in pharmacology at UT Southwestern, also participated in this study. In addition, the researchers used the UT Southwestern High Throughput System resource in the Department of Biochemistry.

Other participating researchers were from St. Jude Children’s Research Hospital; Griffith University in Australia; the University of Washington, Seattle; the University of Pennsylvania; GlaxoSmithKline; the University of California, San Francisco; Johns Hopkins Bloomberg School of Public Health; the University of Pittsburgh; Medicines for Malaria Venture, Switzerland; the Portland VA Medical Center; and Rutgers, The State University of New Jersey.

The study was funded by the National Institutes of Health, the Welch Foundation, the Medicines for Malaria Venture and other organizations.

Media Contact: Aline McKenzie
214-648-3404
aline.mckenzie@utsouthwestern.edu

Media Contact

Aline McKenzie EurekAlert!

More Information:

http://www.utsouthwestern.edu

All latest news from the category: Life Sciences and Chemistry

Articles and reports from the Life Sciences and chemistry area deal with applied and basic research into modern biology, chemistry and human medicine.

Valuable information can be found on a range of life sciences fields including bacteriology, biochemistry, bionics, bioinformatics, biophysics, biotechnology, genetics, geobotany, human biology, marine biology, microbiology, molecular biology, cellular biology, zoology, bioinorganic chemistry, microchemistry and environmental chemistry.

Back to home

Comments (0)

Write a comment

Newest articles

Results for control of pollutants in water

Brazilian scientists tested a simple and sustainable method for monitoring and degrading a mixture of polycyclic aromatic hydrocarbons, compounds present in fossil fuels and industrial waste. An article published in the journal Catalysis…

A tandem approach for better solar cells

Perovskite-based solar cells were first proved in 2009 to have excellent light-absorbing properties of methylammonium lead bromide and methylammonium lead iodide, collectively referred to as lead halide perovskites or, more…

The behavior of ant queens is shaped by their social environment

Specialization of ant queens as mere egg-layers is reversible / Queen behavioral specialization is initiated and maintained by the presence of workers. The queens in colonies of social insects, such…

Partners & Sponsors