Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Arthritis drug might prove effective in fighting the flu

27.05.2009
University of Maryland researchers see potential new treatment approach in targeting immune response to virus

Researchers at the University of Maryland School of Medicine have found that an approved drug for treating rheumatoid arthritis reduces severe illness and death in mice exposed to the Influenza A virus.

Their findings suggest that tempering the response of the body's immune system to influenza infection may alleviate some of the more severe symptoms and even reduce mortality from this virus.

The scientists report in the June 1 edition of The Journal of Immunology, which is now available online, that mice infected with the Influenza A virus responded favorably to a drug called Abatacept, which is commonly used to treat people with rheumatoid arthritis. The mice had been given "memory" T-cells, or white blood cells that have been primed to fight the invading virus as the result of previous exposure to Influenza A.

"We found that treating the mice with Abatacept minimized tissue damage caused by the immune response, but still enabled the body to rid itself of the virus. The mice didn't become as sick, recovered much faster and had much less damage to the lungs, compared to mice that weren't given the drug," says Donna L. Farber, Ph.D., a professor of surgery and microbiology and immunology at the University of Maryland School of Medicine and the study's senior author.

"Moreover, treatment with Abatacept significantly improved survival for mice infected with a lethal dose of influenza virus," Dr. Farber says. "The survival rate for the treated mice was 80 percent, compared to 50 percent for the mice that weren't treated."

She explains that the drug does not interrupt the immune system's early, rapid attack in the lungs, which helps to kill the virus, but it prevents "memory" T-cells from overreacting, which produces multiple negative effects. "It's this overactive immune response that can make you feel sick – and can also lead to pneumonia," she says.

The study's lead author, John R. Teijaro, a researcher in Dr. Farber's lab, notes that tissue damage caused by this vigorous immune response – often most prevalent in young, healthy people – is thought to be the leading cause of death from pandemic strains of flu, such as the avian flu and the 1918 Spanish flu. It is also thought to be true of the early cases of H1N1 "swine" flu.

Dr. Farber says, "We believe that our findings are very significant because they provide a potential new treatment for infection by the influenza virus – one that would dampen the immune response, yet still preserve its protective effects."

The researchers are now testing Abatacept in mice that have not previously been exposed to the flu virus, trying to determine how well they respond to the drug once they have become very sick. Instead of having "memory" T-cells, these mice have what are known as "naïve" T-cells, which have never been activated by being exposed to influenza previously. Depending on the results, Dr. Farber hopes to one day bring this promising new immunotherapy to the clinic for the benefit of patients.

E. Albert Reece, M.D., Ph.D., M.B.A., vice president for medical affairs, University of Maryland, and dean of the University of Maryland School of Medicine, says, "The results of this study are very promising. Influenza is a significant public health problem, affecting millions around the world each year. We hope that this study – and Dr. Farber's continuing research – will pave the way for identifying an effective treatment," Dr. Reece says.

Abatacept, which is manufactured by Bristol-Myers Squibb and marketed under the name Orencia, is already approved by the U.S. Food and Drug Administration for treatment of rheumatoid arthritis. The drug is not approved for treating influenza.

The study, funded by the National Institutes of Health and Bristol-Myers Squibb, is available online at http://www.jimmunol.org/cgi/content/full/182/11/6834. The Journal of Immunology is a peer-reviewed publication of the American Association of Immunologists.

There are three types of seasonal influenza, A, B and C, and a number of subtypes of Influenza A, including a new strain of the H1N1 virus, also known as the "swine flu," which has recently emerged and caused illness and a number of deaths this year in Mexico, the United States and other countries around the world.

Vaccination is the most effective way to prevent someone from getting the flu or having a serious case of the disease. An antiviral drug, Tamiflu, can help to prevent the flu virus from spreading within the body if it is taken within 48 hours of the first symptoms.

Dr. Farber points out that an immunotherapy with a drug such as Abatacept would be effective against different strains of the virus because the target of the drug would be the immune system, not the virus itself. "We're very excited about the potential of developing a new therapy, which possibly could be given to people even after they are very sick," she says.

Karen Warmkessel | EurekAlert!
Further information:
http://www.umm.edu

More articles from Life Sciences:

nachricht Flow of cerebrospinal fluid regulates neural stem cell division
22.05.2018 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt

nachricht Chemists at FAU successfully demonstrate imine hydrogenation with inexpensive main group metal
22.05.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

Im Focus: Computer-Designed Customized Regenerative Heart Valves

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...

Im Focus: Light-induced superconductivity under high pressure

A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.

Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Supersonic waves may help electronics beat the heat

18.05.2018 | Power and Electrical Engineering

Keeping a Close Eye on Ice Loss

18.05.2018 | Information Technology

CrowdWater: An App for Flood Research

18.05.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>