Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Ohio State researchers restore immune function in spinal injured mice

07.08.2013
In a new study, researchers at The Center for Brain and Spinal Cord Repair at The Ohio State University Wexner Medical Center show that is possible to restore immune function in spinal injured mice.

People with spinal cord injury often are immune compromised, which makes them more susceptible to infections. Why these people become immune-suppressed is not known, but the Ohio State study found that a disorder called autonomic dysreflexia can cause immune suppression.

Autonomic dysreflexia is a potentially dangerous complication of high-level spinal cord injury characterized by exaggerated activation of spinal autonomic (sympathetic) reflexes. This can cause an abrupt onset of excessively high blood pressure that can cause pulmonary embolism, stroke and in severe cases, death.

"Our research offers an explanation for why people with spinal cord injuries develop a condition referred to as 'central immune depression syndrome.' Their immune systems, which are required to fight off infection, are suppressed due to damage or malfunction in regions of the spinal cord that help control immune function," said principal investigator Phillip G. Popovich, Ph.D., Professor of Neuroscience in Ohio State's College of Medicine and Director of Ohio State's Center for Brain and Spinal Cord Repair.

The study is published in the Journal of Neuroscience.

Researchers found that autonomic dysreflexia develops spontaneously in spinal cord injured mice, and becomes more frequent as time passes from the initial spinal cord injury.

They also found that simple, everyday occurrences that activate normal spinal autonomic reflexes, such as having bowel movements or emptying the bladder, become hyperactive and suppress immune function in people with spinal cord injury.

In the study, Popovich and colleagues were able to restore immune function in mice with spinal cord injuries using drugs that inhibit norepinephrine and glucocorticoids, immune modulatory hormones that are produced during the onset and progression of AD. They also observed in a patient with a high-level spinal cord injury that briefly inducing autonomic dysreflexia impaired immune function, confirming that their findings in mice have relevance to humans.

"Although we don't know how to fix this yet, we also show that it is possible to restore immune function in spinal injured mice," Popovich said. "After spinal cord injury, the ability of the spinal cord to control the immune system is impaired. As result, these individuals become susceptible to infection, and often die from these infections. For those that survive, the infections can impair what little function they have left after the spinal cord injury."

The study found that autonomic dysreflexia causes immune suppression in part by releasing into blood and immune organs high levels of immune modulatory hormones that non-selectively kill mature and immature white blood cells in the spleen, said first author Yi Zhang, a post-doctoral neuroscience researcher at Ohio State.

"Our research is laying the groundwork for potential therapeutic targets for reversing central immune depression syndrome," Zhang said, adding that further research is needed.

Ohio State's Center for Brain and Spinal Cord Repair is an interdisciplinary collaboration of basic and clinical scientists working to promote recovery and repair and to discover new treatments for individuals who suffer from brain or spinal cord injuries.

Ohio State researchers involved in this study are Zhen Guan, Brenda Reader, Todd Shawler, Shweta Mandrekar-Colucci, Kun Huang, Zachary Weil, Anna Bratasz, Jonathan Wells, Nicole Powell, John Sheridan and Caroline Whitacre.

Other researchers involved in this study include Alexander Rabchevsky, University of Kentucky and Mark Nash, University of Miami Miller School of Medicine.

This research was supported by the National Institutes of Health (R21 NS067260) and the Ray W. Poppleton Endowment.

Eileen Scahill | EurekAlert!
Further information:
http://www.osumc.edu

More articles from Studies and Analyses:

nachricht Amputees can learn to control a robotic arm with their minds
28.11.2017 | University of Chicago Medical Center

nachricht The importance of biodiversity in forests could increase due to climate change
17.11.2017 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

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

Im Focus: First-of-its-kind chemical oscillator offers new level of molecular control

DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.

Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

Engineers program tiny robots to move, think like insects

15.12.2017 | Power and Electrical Engineering

One in 5 materials chemistry papers may be wrong, study suggests

15.12.2017 | Materials Sciences

New antbird species discovered in Peru by LSU ornithologists

15.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>