In research aimed at addressing a global epidemic, a team of scientists from around the world has cracked the genetic code for the parasite that is responsible for up to 40 percent of the 515 million annual malaria infections worldwide, Nature reveals in its October 9 cover story.
Led by a parasitologist from NYU Langone Medical Center, Jane Carlton, PhD, some 40 researchers sequenced the genome of Plasmodium vivax (P. vivax), one of four malaria parasites that routinely affect humans. P. vivax, which is increasingly resistant to some antimalarial drugs, is the species most common outside Africa, particularly in Asia and the Americas, including the United States, the site of periodic outbreaks.
Vivax malaria, as it is known, is believed more robust and resilient than its cousin, the more deadly malaria species, P. falciparum – and is thus more difficult to eradicate. Distinctively, vivax malaria can be transmitted by mosquitoes in cooler temperatures. It also has a dormant stage that enables it to re-emerge as climates warm, causing "relapses" of the disease months and even years after a first attack.
Symptoms for the two strains of malaria are similar – flu-like, featuring fever and abdominal pain, often leading to severe anemia – and, in children, lifelong learning disabilities. Malaria is a disease of poorer populations, and overall is estimated annually to kill more than a million people worldwide.
Researchers also identified several pathways in the P. vivax parasite that could eventually be targets for drug treatment. Both P. vivax and P. falciparum vivax are also being studied to identify potential vaccine targets.
The research is regarded as all the more significant in that P. vivax has long remained little-researched, little-known and little-understood. Such neglect is mainly due to the focus on the more deadly malaria species, P. falciparum -- P. vivax is seldom lethal -- and also because the parasite cannot be grown in a lab setting. Further, the growing burden of vivax malaria will complicate efforts to control P. falciparum in areas where the two coincide.
Indeed, the project that led to the landmark genetic decoding was in the works for a total of six years, involving researchers from England, Spain, Australia and Brazil as well as the United States. After two years, remaining funds from the P. falciparum genome project were exhausted, and funding from the Burroughs Wellcome Fund and the National Institutes of Health allowed its completion.
P. vivax is the second species of human malaria parasite to be sequenced. Researchers found the genome for P. vivax dramatically different from the genomes of three other sequenced malaria parasites – different in content, structure and complexity. They used whole genome shotgun methods to produce high-quality sequences that will enable malaria researchers worldwide to undertake further research on the parasite. The next step is to sequence six other P. vivax genomes – from Brazil, Mauritania, India, North Korea and Indonesia -- to identify novel vaccine candidates and generate an evolutionary map of the species.
"This project is a tribute to the collegiality and tenacity of the vivax malaria community," says Jane M. Carlton, associate professor at NYU School of Medicine's Department of Medical Parasitology, who led a team of investigators from around the world. "They have persevered despite financial tribulations and lack of interest to generate an invaluable resource. These findings will be used by all malariologists for years to come to advance scientific investigation into this neglected species."
"The availability of genome sequence data has great potential to accelerate the identification and development of novel vaccines and therapeutics against this major human pathogen," says Claire Fraser-Liggett, PhD, director of the Institute of Genomic Sciences at University of Maryland School of Medicine and formerly president of The Institute for Genomic Research, Rockville Maryland where the project began. "Dr. Carlton is to be congratulated for her leadership role in bringing this project to completion."
"Unveiling the full genome sequence of Plasmodium vivax is a tremendous advance – a huge step forward in parasite biology and the fight against malaria," says Nick White, MD, professor of tropical medicine, Oxford University, England and Mahidol University, Thailand.
Anitra Haithcock | EurekAlert!
How cheetahs stay fit and healthy
24.03.2017 | Forschungsverbund Berlin e.V.
When Air is in Short Supply - Shedding light on plant stress reactions when oxygen runs short
23.03.2017 | Institut für Pflanzenbiochemie
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
23.03.2017 | Life Sciences
23.03.2017 | Power and Electrical Engineering
23.03.2017 | Earth Sciences