Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Children’s National Researchers Identify a New Trigger for Alternate Reproduction Pathway of HIV-related Cancer Virus

18.04.2012
A research team led by Children’s National Medical Center has identified a trigger that causes latent Kaposi’s sarcoma-associated herpesvirus (KSHV) to rapidly replicate itself.

KSHV causes Kaposi’s sarcoma, primary effusion lymphoma, and other cancers that commonly affect immunocompromised patients, including those with AIDS. Appearing in the online edition of the Journal of Virology, the study identifies apoptosis, or the programmed death of a virus’ host cell, as the trigger for high-level viral replication.

“Finding that the programmed death of a host cell triggered rapid production of Kaposi’s sarcoma-associated herpesvirus, means that KSHV has the ability to sense and respond to critical changes in the cells that it grows in, something we didn’t know before,” stated lead author Alka Prasad, PhD, who is a member of the Center for Cancer and Immunology Research at Children’s National Medical Center.

“We previously thought that the virus was more of an inanimate entity. This newly discovered pathway is clearly helpful to the virus and clues researchers in on how we might target treatments. If the host cell died quickly, before the virus could reproduce, then the virus could not infect any new cells. Having the ability to sense when the host cell is about to die and reproduce quickly in response gives the virus an evolutionary advantage. In addition, cancers caused by KSHV and other herpesviruses are commonly treated with drugs that kill cells, so the results could have a significant effect on the treatment of KSHV-related cancers, which we will need to explore.”

KSHV and the cancers it causes most commonly afflict patients with AIDS and other disorders that impact the immune system. KSHV attaches to white blood cells and either actively replicates through a controlled gene expression program or remains latent. A specific genetic protein in the virus, called an ORF50 gene product, is thought to control the transition from latency to replication. Using a derivative of this specific protein that blocks gene expression and replication, the scientists found that when apoptosis was induced, KSHV replicated itself. They also discovered that whether this derivative was present or not, apoptopsis induced the virus’ replication.

“In addition to looking at the clinical implications of these research findings, we now need to focus in on the pathway that links apoptosis to this particular replication pathway and perhaps expand our research from KSHV to include another example of herpesvirus,” commented Steven Zeichner, MD, PhD, the senior author on the paper, who is a principal investigator for the Center for Cancer and Immunology Research at Children’s National and a professor at the George Washington University School of Medicine. The study was supported in part by the new NIH-funded District of Columbia Center for AIDS Research, of which Children’s National is a key member.

Related Links Read the study abstract in the Journal of Virology
HIV/AIDS research at Children’s National
The District of Columbia Center for AIDS Research

Contact: Emily Hartman or Paula Darte: 202-476-4500.
About Children’s National Medical Center
Children’s National Medical Center in Washington, DC, has been serving the nation’s children since 1870. Home to Children’s Research Institute and the Sheikh Zayed Institute for Pediatric Surgical Innovation, Children’s National is consistently ranked among the top pediatric hospitals by U.S.News & World Report and the Leapfrog Group. With 303 beds, more than 1,330 nurses, 550 physicians, and seven regional outpatient centers, Children’s National is the only exclusive provider of acute pediatric care in the Washington metropolitan area. Children’s National has been recognized by the American Nurses Credentialing Center as a Magnet® designated hospital, the highest level of recognition for nursing excellence that a medical center can achieve. For more information, visit www.ChildrensNational.org, receive the latest news from the Children's National press room, or follow us Facebook and Twitter.

Emily Hartman | EurekAlert!
Further information:
http://www.childrensnational.org

More articles from Health and Medicine:

nachricht One gene closer to regenerative therapy for muscular disorders
01.06.2017 | Cincinnati Children's Hospital Medical Center

nachricht The gut microbiota plays a key role in treatment with classic diabetes medication
01.06.2017 | University of Gothenburg

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>