Navigation Links
Study Finds Parkinson’s Cell Death Blocked by Stopping Inflammatory Facto

Blocking one of the body’s natural inflammatory factors gives substantial protection against cell death in the brain associated with Parkinson’s disease//, researchers at UT Southwestern Medical Center have found in a study on rats.

By using a drug against an inflammatory molecule called tumor necrosis factor or TNF, the researchers saw a 50 percent drop in dopamine neuron death in the brains of rats injected with compounds that cause Parkinson’s-like cell death.

“Our findings suggest that TNF-dependent inflammation may be part of the progressive features of Parkinson’s disease, and this gives us an opportunity with anti-TNF therapy to slow down or prevent the progression of the disease,” said Dr. Malú Tansey, assistant professor of physiology at UT Southwestern and senior author of the study. “Our prediction is that independent of the environmental toxin or trigger that induces its production in the midbrain, TNF is likely to be a common mediator of dopamine neuron death.”

Tumor necrosis factor is necessary for a functioning immune system. Its effects include the local inflammation and redness around wounds, and the painful swelling around joints in rheumatoid arthritis. TNF also activates other cells – including cells in the brain called microglia – that eat bacteria and other pathogens.

While the results point in a direction for treating neurodegenerative diseases with anti-inflammatories, a few problems will need to be addressed before anti-TNF therapies could come into widespread use to fight neurodegeneration, Dr. Tansey said. For instance, commercially available anti-TNF drugs as well as the new drug used in this study are too large to independently cross from the bloodstream into brain tissue.

Parkinson’s disease affects 5 percent of people over 65, and is the second most common neurodegenerative disease after Alzheimer’s. Parkinson’s disease comes about because of the death of a certain class of ner ve cells in an area of the brain called the substantia nigra. By the time serious symptoms appear, more than 80 percent of the dopamine-producing nerve cells are already dead, and the damage is irreversible.

In addition to its beneficial role, TNF has been a suspected player in Parkinson’s because elevated levels of it are found in post-mortem brains and cerebrospinal fluid of people with the disease. A previous study by other researchers found that non-steroidal anti-inflammatory drugs that block production of TNF and related molecules can reduce the risk of developing Parkinson’s by 46 percent.

In the current study, UT Southwestern researchers injected two different substances into the rats’ brains to cause cell death in the substantia nigra – low-dose infusion of LPS, a toxin from bacteria often used to mimic chronic inflammation of the central nervous system, and 6-hydroxydopamine, which kills cells by creating an overwhelming amount of reactive oxygen and nitrogen molecules. Cell death was measured by counting neurons in stained brain slices.

When an experimental TNF inhibitor called XENP345, designed specifically to block soluble TNF, was also introduced into the brain, dopamine neuron death was reduced by about half.

The same effect was found on cultured dopamine neurons exposed to either toxin.

The researchers are now looking into why TNF inhibition did not fully protect against cell death. For example, the drug may not have been able to fully diffuse throughout the tissue, it might take longer to work than the weeks allowed in the experiment, or dopamine neuron loss might also involve processes independent of TNF.

“If an intervention could still reduce the extent or rate of cell death by 50 percent, it could make a huge difference in the life of a Parkinson’s disease patient,” Dr. Tansey said.


Related medicine news :

1. Tomato Sauce reduces Cancer Risk- Study
2. Study on obesity and heart failure
3. National Lung Study in the process
4. Study casts doubt on keyboard ills
5. Study reveals how stress can make you sick
6. Study reveals how stress can make you sick
7. Study supports vegetable diet
8. Study to look at early surgery to treat epilepsy
9. Its Never Too Late to Stop Smoking,Study Finds
10. New Technique to Study Infants Brain.
11. Groundbreaking Study Gives Hope For Patients With Kidney Cancer
Post Your Comments:

(Date:10/13/2017)... ... 2017 , ... The Visiting Nurse Association (VNA) of Somerset Hills is proud ... and unique items from across the nation, this holiday-themed event will raise funds and ... the VNA. The boutique will be open Saturday, November 4 (10:00 a.m. – ...
(Date:10/13/2017)... ... October 13, 2017 , ... Coveros, a ... has been awarded a contract by the Center for Medicare and Medicaid Services ... accelerate the enterprise use of Agile methodologies in a consistent and high value ...
(Date:10/12/2017)... (PRWEB) , ... October 12, 2017 , ... Planet Fitness, ... the U.S., announced today its plans to open a flagship location in Covington, LA ... the former Rooms To Go store next to Office Depot in the Holiday Square ...
(Date:10/12/2017)... ... October 12, 2017 , ... Information ... we intend to develop to enable prevention of a major side effect of ... loss, especially in pediatric patients. For cisplatin, hearing loss is FDA listed on-label ...
(Date:10/12/2017)... ... October 12, 2017 , ... Women-owned and Grand Rapids-based ... and Brightest in Wellness® by Best and Brightest. OnSite Wellness will be honored ... 20 from 7:30 a.m. to 2 p.m. at the Henry Autograph Collection Hotel, ...
Breaking Medicine News(10 mins):
(Date:10/12/2017)...   Divoti USA will engrave and process ... of the latest FDA requirements, which stipulates new criteria regarding medical ... need of Medical ID jewelry such as Medical ID Bracelets, can ... in terms of the new FDA requirements . ... Divoti offers this dark mark fiber laser ...
(Date:10/11/2017)... Holdings, Inc. ("Hill-Rom") (NYSE: HRC), today provided an update ... Puerto Rico , where the company manufactures ... Following a comprehensive onsite assessment, the ... temporary loss of power and minimal water damage due ... have resumed, and the company expects to return to ...
(Date:10/4/2017)... Korea , Oct. 4, 2017  South Korean-based ... next-generation CPR training aide "cprCUBE" on Kickstarter. The device ... compression during cardiac arrests with better efficiency compared to ... also offers real-time feedback on efficacy of the compression ... crowdfunding campaign has a goal to raise $5,000. ...
Breaking Medicine Technology: