Navigation Links
Discovery shows fat triggers rheumatoid arthritis
Date:5/8/2013

AURORA, Colo. (May 8, 2013) Scientists have discovered that fat cells in the knee secrete a protein linked to arthritis, a finding that paves the way for new gene therapies that could offer relief and mobility to millions worldwide.

"We found that fat in the knee joints secretes a protein called pro-factor D which gives rise to another protein known as factor D that is linked to arthritis," said Nirmal Banda, Ph.D., associate professor of medicine in the Division of Rheumatology at the University of Colorado School of Medicine. "Without factor D, mice cannot get rheumatoid arthritis."

Rheumatoid arthritis is an autoimmune condition that gradually destroy bones, muscles, joints, cartilage and other connective tissue. Over 1% or about 1.3 million Americans suffer from it.

Banda, senior author of the study published this week in the Journal of Immunology, has spent the last 14 years tracking down the causes of rheumatoid arthritis in collaboration with CU School of Medicine professors Michael Holers, MD, and William Arend, MD.

Now, with the discovery of pro-factor D in mice with rheumatoid arthritis, he is working on gene therapies to eliminate the protein in localized areas. However, these findings still need to be extended to humans.

"We are looking at vaccines, drugs or inhibitors to stop the local secretion of pro-factor D in the mouse," he said. "Our goal would be to stop the disease before it progresses and leads to joint destruction."

Factor D is part of the complement system, a complex array of over 40 proteins that help the body fight off bacteria and other pathogens. In studies with arthritic mice, Banda previously found that the complement pathway involving factor D made the mice susceptible to inflammatory arthritis.

In his latest study, he discovered that removing factor D, rather than the entire complement system, achieves the same result without compromising other parts of the system that can fight infection.

"We know that fat is normally present around all organs of the body," he said. "But what we didn't know until now was that the fat is secreting this protein which actually triggers arthritis in the joints."

He noted that fat does the same thing in all the joints, not just the knees. That means new medications resulting from this discovery could treat inflammatory arthritis throughout the body.

While it's theoretically possible to destroy the entire complement system in humans to prevent arthritis, it eventually returns along with a renewed risk of contracting the disease. In the meantime, patients can get infections and other complications because they lack this critical part of the immune system.

"The complement system is both friend and foe," Banda said. "We believe we can shut down one part of the complement system that triggers disease without shutting down the rest. If so, we will be making a major stride toward treating and perhaps even curing rheumatoid arthritis."


'/>"/>

Contact: David Kelly
david.kelly@ucdenver.edu
303-724-7903
University of Colorado Denver
Source:Eurekalert

Related biology news :

1. Pitt discovery holds potential in destroying drug-resistant bacteria
2. Discovery of new hormone opens doors to new type 2 diabetes treatments
3. Discovery may help prevent chemotherapy-induced anemia
4. Discovery may help prevent HIV reservoirs from forming
5. An important discovery in breast cancer by IRCM researchers
6. Genetic discovery found to influence obesity in people of African ancestry
7. Accidental discovery may lead to improved polymers
8. Gene discovery may yield lettuce that will sprout in hot weather
9. UGA discovery may allow scientists to make fuel from CO2 in the atmosphere
10. Discovery could increase efficacy of promising cystic fibrosis drug
11. Discovery of first motor with revolution motion in a virus-killing bacteria advances nanotechnology
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/22/2016)... 2016 On Monday, the Department of Homeland ... share solutions for the Biometric Exit Program. The Request ... Protection (CBP), explains that CBP intends to add biometrics ... the United States , in order to deter ... Logo - http://photos.prnewswire.com/prnh/20160622/382209LOGO ...
(Date:6/9/2016)...  Perkotek an innovation leader in attendance control systems is proud to announce the ... employers to make sure the right employees are actually signing in, and to even ... ... ... ...
(Date:6/2/2016)... NEW YORK , June 2, 2016   The ... (Weather), is announcing Watson Ads, an industry-first capability in which ... advertising, by being able to ask questions via voice or ... Marketers have long ... with the consumer, that can be personal, relevant and valuable; ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the ... the Supplyframe Design Lab . Located in Pasadena, Calif., the Design Lab’s ... how hardware projects are designed, built and brought to market. , The Design ...
(Date:6/23/2016)... ... ... In a new case report published today in STEM CELLS Translational Medicine, ... after being treated for breast cancer benefitted from an injection of stem cells derived ... debilitating, frequent side effect of cancer treatment. , Lymphedema refers to the ...
(Date:6/23/2016)... Calif. , June 23, 2016  Blueprint Bio, ... biological discoveries to the medical community, has closed its ... Matthew Nunez . "We have received ... with the capital we need to meet our current ... essentially provide us the runway to complete validation on ...
(Date:6/23/2016)... YORK , June 23, 2016 ... trading session at 4,833.32, down 0.22%; the Dow Jones Industrial ... S&P 500 closed at 2,085.45, down 0.17%. Stock-Callers.com has initiated ... INFI ), Nektar Therapeutics (NASDAQ: NKTR ), ... Therapeutics Inc. (NASDAQ: BIND ). Learn more about ...
Breaking Biology Technology: