Navigation Links
Scientists find obesity alone does not cause arthritis in animals
Date:9/28/2009

DURHAM, N.C. The link between obesity and osteoarthritis may be more than just the wear and tear on the skeleton caused by added weight.

A Duke University study has found that the absence of the appetite hormone leptin can determine whether obese mice experience arthritis, no matter how heavy they are.

"We were completely surprised to find that mice that became extremely obese had no arthritis if their bodies didn't have leptin," said Farshid Guilak, Ph.D., director of orthopaedic research in the Duke Department of Surgery. "Although there was some earlier evidence that leptin might be involved in the arthritis disease process, we didn't think that there would be no arthritis at all."

In fact, the joints from the obese mice in the study appearing in the journal Arthritis & Rheumatism looked better than those of the normal control mice, Guilak said. "However, in another study, we found that mice that gained half as much weight on a high-fat diet but processed leptin normally showed significant knee osteoarthritis."

Leptin influences many of the factors involved in osteoarthritis--body weight, inflammation, sex hormone levels, and bone metabolism, said lead author Tim Griffin, Ph.D., who was at Duke Orthopaedic Department and now is an assistant member of the Free Radical Biology and Aging Program at the Oklahoma Medical Research Foundation. "That also makes leptin challenging to study, however, because it's difficult to isolate which pathway is being altered to prevent the development of osteoarthritis."

Leptin is a well-known regulator of appetite, but this is the first time scientists have reported a role for leptin as a metabolic link between obesity and altered cartilage metabolism in joints.

The role of obesity as a risk factor for arthritis is well characterized, but it was thought to be merely a case of overloading joints with extra weight. "It hadn't been studied beyond that," Guilak said.
'/>"/>

Contact: Mary Jane Gore
mary.gore@duke.edu
919-660-1309
Duke University Medical Center
Source:Eurekalert

Page: 1 2 3

Related medicine news :

1. New prion protein discovered by Canadian scientists may offer insight into mad cow disease
2. Scientists Probe Sepsis Deadly Secrets
3. Scientists puzzled by severe allergic reaction to cancer drug in the middle Southern US
4. Scientists Develop Natural Protection for Stored Foods
5. Scientists detect presence of marburg virus in african fruit bats
6. Scientists Spot Brains Free Will Center
7. Scientists ID Likely Culprit in Popcorn Lung
8. Scientists explain how insulin secreting cells maintain their glucose sensitivity
9. Scripps Research scientists shed new light on how antibodies fight HIV
10. Scientists, physicians present latest findings in personalized cancer treatment and prevention
11. Scientists demonstate link between genetic variant and effectiveness of smoking cessation meds
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/12/2014)... The Passenger Information System market is estimated ... million by 2019, at an expected CAGR of 26.5% ... public transport infrastructure in North America is well developed ... every corner of the region. The growing ridership figures ... service providers are driving the North American Passenger Information ...
(Date:7/12/2014)... HealthDay Reporter SATURDAY, July 12, 2014 ... surgical technique used to grind up uterine growths and remove ... cancer to other parts of a woman,s body, U.S. health ... and Drug Administration also said that women who do undergo ... a written consent stating that they understand the potential risks, ...
(Date:7/12/2014)... July 12, 2014 The Security Analytics ... 2013 to $3,376.6 million by 2019, at an expected ... 2019. The challenges to counter the increasing number of ... of outdated cyber defense systems in organizations are enormous. ... and remodeling their existing architecture to develop better and ...
(Date:7/12/2014)... (HealthDay News) -- If you make exercise fun, you,ll eat ... experiment, 56 adults were led on a 1.4-mile walk and ... a scenic walk. The participants were given lunch after the ... outing ate 35 percent more chocolate pudding for dessert than ... In another experiment, 46 adults were given mid-afternoon snacks after ...
(Date:7/12/2014)... “After my mom’s stroke, she loss the use of her right ... of his left side. Eating became a difficult task for them ... them enjoy eating again,” said an inventor, from Fayetteville, N.C. As ... PLATE (P C H PLATE). , The PATRICIA CAROL HALL PLATE ... for individuals who suffer from stroke, experience tremors or loss of ...
Breaking Medicine News(10 mins):Health News:North America Passenger Information System (ICT) Market worth $5,486.88 Million by 2019 - New Report by MicroMarket Monitor 2Health News:North America Passenger Information System (ICT) Market worth $5,486.88 Million by 2019 - New Report by MicroMarket Monitor 3Health News:North America Passenger Information System (ICT) Market worth $5,486.88 Million by 2019 - New Report by MicroMarket Monitor 4Health News:FDA Advisers Weigh Risks of Procedure for Removal of Uterine Fibroids 2Health News:FDA Advisers Weigh Risks of Procedure for Removal of Uterine Fibroids 3Health News:North America Security Analytics Market Worth $1,215.2 Million by 2019 - New Report by MicroMarket Monitor 2Health News:North America Security Analytics Market Worth $1,215.2 Million by 2019 - New Report by MicroMarket Monitor 3Health News:North America Security Analytics Market Worth $1,215.2 Million by 2019 - New Report by MicroMarket Monitor 4Health News:Make Exercise Fun, Eat Less Afterwards 2
... COLUMBIA, Mo. Most people have witnessed otherwise intelligent ... intoxicated, but what specifically happens in the brain to ... effects on brain activity from the University of Missouri ... people when they are making a mistake, ultimately reducing ...
... September 1, 2011Scientists involved in DNA vaccine research are ... effective delivery systems and the development of more efficient ... Top investigators in the field recently discussed these and ... "DNA Vaccines: Building on Clinical Progress and Exploring New ...
... THURSDAY, Sept. 1 (HealthDay News) -- Most children need to get ... last year, the American Academy of Pediatrics says. The 2011-12 ... year,s vaccine, but a person,s immunity decreases by as much as ... it,s important for children to get another flu shot this year, ...
... --,Molecular signals from stem cells within the skin,s fatty layer ... to new treatments for baldness in people, researchers report. ... to talk to the dormant stem cells at the base ... hair to grow again," senior study author Valerie Horsley, an ...
... engineer? Sex hormones strongly influence people,s interests, which ... to psychologists. , "Our results provide strong support ... by working with things versus people," said Adriene ... Sheri A. Berenbaum, professor of psychology and pediatrics, ...
... THURSDAY, Sept. 1 (HealthDay News) -- The intensity of exercise, ... your chances of living a longer life, a new study ... that men with high levels of cycling intensity lived 5.3 ... longer, than men with low intensity. Among female cyclists, ...
Cached Medicine News:Health News:Alcohol dulls brain 'alarm' that monitors mistakes, MU study finds 2Health News:GEN reports on advances in DNA vaccine delivery and production 2Health News:Last Year's Flu Shot Won't Protect Kids This Season 2Health News:Mouse Study Could Give New Clues to Fighting Baldness 2Health News:Sex hormones impact career choices 2
(Date:7/11/2014)... 2014 Show organisers ... Health Expo 2014 were a brand new ... London , plus a 10% ...        (Logo: http://photos.prnewswire.com/prnh/20130723/629764-a) ...      (Photo: http://photos.prnewswire.com/prnh/20140711/696892-b ...
(Date:7/10/2014)... CLEVELAND , July 10, 2014  The U.S. ... a three-year grant to University Hospitals (UH) Case Medical ... a new national model aimed at improving care for ... Oncology Care," the project will test a unique model ... patients with late-stage disease, significant comorbidities, or demonstrated need ...
(Date:7/10/2014)... July 10, 2014 Yesterday, former Congressman ... medical device manufacturing facility. Rep. Kennedy and ... monitors facilitate cutting-edge research in neurological disease and ... mental health advocate, Garen Staglin , created ... fostering fundamental changes that will radically accelerate the ...
Breaking Medicine Technology:UK's Flagship Health & Safety Event Has Successful Inaugural Year in London 2UK's Flagship Health & Safety Event Has Successful Inaugural Year in London 3UK's Flagship Health & Safety Event Has Successful Inaugural Year in London 4University Hospitals Case Medical Center Awarded $4.7 Million Grant from U.S. Department of Health and Human Services 2University Hospitals Case Medical Center Awarded $4.7 Million Grant from U.S. Department of Health and Human Services 3University Hospitals Case Medical Center Awarded $4.7 Million Grant from U.S. Department of Health and Human Services 4Representative Patrick Kennedy visits Moberg's medical device facility to discuss improvement in brain injury care 2
... Voreloxin Demonstrates Promising Clinical Activity in Patients with ... Difficult-to-Treat ... Sunesis,Pharmaceuticals, Inc. (Nasdaq: SNSS ) presented data from three ... the Chemotherapy Foundation Symposium held in New York on November ...
... 5 Medarex, Inc.,(Nasdaq: MEDX ) today ... of,an undisclosed amount from its licensing partner, Centocor ... trial of CNTO 95, a fully human antibody,targeting ... The CNTO 95 human antibody was generated using ...
Cached Medicine Technology:Sunesis Pharmaceuticals Presents Clinical Trial Data of Voreloxin in Patients with Acute Myeloid Leukemia and Ovarian Cancer at the Chemotherapy Foundation Symposium 2Sunesis Pharmaceuticals Presents Clinical Trial Data of Voreloxin in Patients with Acute Myeloid Leukemia and Ovarian Cancer at the Chemotherapy Foundation Symposium 3Sunesis Pharmaceuticals Presents Clinical Trial Data of Voreloxin in Patients with Acute Myeloid Leukemia and Ovarian Cancer at the Chemotherapy Foundation Symposium 4Sunesis Pharmaceuticals Presents Clinical Trial Data of Voreloxin in Patients with Acute Myeloid Leukemia and Ovarian Cancer at the Chemotherapy Foundation Symposium 5Medarex Receives Milestone Payment for Investigational Antibody Targeting Integrin Receptors 2
... is a national reference laboratory and a ... development. ARUP offers an extensive test menu ... in clinical and anatomic pathology. Owned by ... include more than half of the nation's ...
... a national reference laboratory and a worldwide ... ARUP offers an extensive test menu of ... clinical and anatomic pathology. Owned by the ... more than half of the nation's university ...
... ARUP Laboratories is a national reference laboratory ... research and development. ARUP offers an extensive ... medical tests in clinical and anatomic pathology. ... Laboratories' clients include more than half of ...
... Laboratories is a national reference laboratory and ... and development. ARUP offers an extensive test ... tests in clinical and anatomic pathology. Owned ... clients include more than half of the ...
Medicine Products: