Navigation Links
Ohio State researchers restore immune function in spinal injured mice
Date:8/6/2013

COLUMBUS, Ohio 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.


'/>"/>

Contact: Eileen Scahill
Eileen.Scahill@osumc.edu
614-293-3737
Ohio State University Wexner Medical Center
Source:Eurekalert

Related medicine news :

1. Study reveals how cancer drug causes diabetic-like state
2. New drug prevents spread of human prostate cancer cells
3. 2 genetic deletions in human genome linked to the development of aggressive prostate cancer
4. Intensity Modulated Radiation Therapy optimal for localized prostate cancer
5. Study examines adverse effects among different radiation therapies for prostate cancer
6. Study Casts Doubt on Value of Pricey Prostate Cancer Therapy
7. Warren Buffett Has Early Stage Prostate Cancer
8. Majority of states fail to address youth exposure to alcohol marketing
9. Genetic abnormalities in benign or malignant tissues predict relapse of prostate cancer
10. PSA screening to detect prostate cancer can be beneficial to younger and at-risk men
11. Mayo Clinic researchers discover biomarkers for prostate cancer detection, recurrence
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/24/2017)... ... 24, 2017 , ... Texas Physical Therapy Specialists (TexPTS) is pleased to ... Road. The clinic is the group’s 7th location in San Antonio and 23rd in ... will provide care from the clinic, which opened March 22, 2017. , ...
(Date:3/24/2017)... ... 24, 2017 , ... Shamanic healer and teacher Anahata Ananda ... Spiritual Awakening, proudly presents her Sacred Peru retreat with world famous shaman ... journey during the Summer Solstice will also be her final international retreat, Anahata ...
(Date:3/24/2017)... ... 24, 2017 , ... Northridge dentists, Dr. Michel ... sleep apnea and TMJ at their office. TMJ, or temporomandibular joint disorder, has ... type, is increasingly being treated at dental offices with newly developed procedures and ...
(Date:3/24/2017)... ... March 24, 2017 , ... Viewers who like to educate themselves on ... cultural practices, goods, services, and societal issues tend to appreciate and love the "Informed" ... practice of utilizing running events for causes around the world. , Running ...
(Date:3/24/2017)... ... March 24, 2017 , ... Judy Buchanan, ... Master in Frederick, MD. Judy says, “I am passionate about sharing Reiki as ... a very difficult and challenging time.” , A Certified Medical Reiki™ Master trained ...
Breaking Medicine News(10 mins):
(Date:3/23/2017)... 2017 Executive Summary ... extensive primary research (inputs from industry experts, companies, ... present the analysis of global heart valve devices ... Repair); Replacement Procedure By Technique (Mechanical, Bioprosthetic, Transcatheter ... Devices, Balloon Valvuloplasty, Transcatheter Mitral Valve Repair (TMVR)), ...
(Date:3/23/2017)... LONDON , March 23, 2017 ... the years along with the prevalence of allergic ... preventative measures are currently revolutionising the ways in ... Allergies 2017 promises to be both ... discussion amongst the allergy interest groups, immunologists, research ...
(Date:3/23/2017)... Summary Global ... guide Primary Hyperoxaluria - Pipeline Review, H1 2017, ... Urinary System And Sex Hormones) pipeline landscape. ... recurrent kidney and bladder stones. It results from ... include blood in the urine, pain when urinating, ...
Breaking Medicine Technology: