Navigation Links
Fat associated with chemical changes in DNA that may help explain obesity-related disease
Date:1/20/2011

AUGUSTA, Ga. Fat appears to associate with some distinctive chemical changes in the DNA a finding that may help explain why obesity can increase the risk for chronic problems such as cardiovascular disease and diabetes, researchers report.

The finding, published in BMC Medicine, may one day help identify those at risk and reduce it, according to Dr. Xiaoling Wang, genetic epidemiologist at the Medical College of Georgia's Georgia Prevention Institute.

"Losing fat is very difficult; we know that. We also know it causes many diseases so we want to identify and target pathways to reduce those diseases," Wang said.

Fat used to be viewed as essentially padding and a ready energy source but scientists are learning it's more like a factory that makes chemicals and compounds such as hormones and proteins. Studies comparing two groups of obese versus lean teens found higher levels of chemical change, or methylation, in a portion of the UBASH3A gene and lower levels in part of the TRIM3 gene.

Both genes are known to have roles in regulating the immune system, which is often dysregulated in obese individuals. Dysregulation can result in a level of chronic inflammation that contributes to diseases such as cardiovascular disease, diabetes and cancer. Methylation can impact immune function by affecting gene expression levels which ultimately impacts downstream functions of the proteins produced by genes.

"You need to know disease pathways to find novel medications," Wang said. "We generally know they have a dysregulation of the immune function, but we didn't know the specific site." She believes she found at least two sites in the UBASH3A and TRIM3 gene. Her initial search was broad: a genome-wide screen of seven obese and seven lean teens that enabled her to identify genes most different between the two. She ranked the differences and, in a much larger study of 46 obese and 46 lean controls, looked at the same sites in the top six genes and found again the distinctive methylation pattern in UBASH3A and TRIM3.

Wang now wants to clarify whether fat causes the DNA changes or vice versa and confirm that the changes contribute to the immune dysfunction associated with obesity.

She notes that because obesity does not always lead to related diseases, it's important to have a way to not just intervene, but to identify those most at risk. Factors such as fitness, body shape and environment probably are also predictors for related disease.

" (T)he public health message of 'eat less and exercise more' appears to have fallen on deaf ears," Drs. Paul W. Franks and Charlotte Ling of Sweden's Skne University Hospital, Lund University write in an accompanying editorial. "Thus, despite the apparently simple explanation and remedy for obesity, this knowledge is not enough. We are saddled with a challenge, which is to unravel the mechanisms by which obesity emerges and to understand how its presence causes disease and death, with the hope that somewhere within the details hides the solution to the problem." They note that Wang's study provides "tentative evidence" that DNA methylation at the two gene sites may be implicated in obesity-related disease.


'/>"/>

Contact: Toni Baker
tbaker@mcg.edu
706-721-4421
Medical College of Georgia
Source:Eurekalert  

Related medicine news :

1. Discovery of a gene associated with a leukemia mostly affecting children
2. Blood Type O Associated With Less Risk for Heart Attack
3. Abstinence, heavy drinking, binge drinking associated with increased risk of cognitive impairment
4. Malfunctioning gene associated with Lou Gehrigs disease leads to nerve-cell death in mice
5. Extreme obesity associated with higher risk of death for 2009 H1N1 patients
6. Consistent exercise associated with lower risk of colon cancer death
7. Poor breast cancer prognosis associated with presence of circulating tumor, cancer stem cells
8. Lower levels of education are associated with increased risks of heart failure
9. Low and high vitamin D levels in older women associated with increased likelihood of frailty
10. Early physical therapy for low back pain associated with less subsequent health care utilization
11. Genetic mutations associated with increased PSA and prostate cancer
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fat associated with chemical changes in DNA that may help explain obesity-related disease
(Date:2/11/2016)... Colorado (PRWEB) , ... February 11, 2016 , ... Colorado ... Review as one of 334 spine surgeons to know in 2016 . The ... in the field of spine surgery. , Dr. Corenman understands the importance of ...
(Date:2/11/2016)... ... February 11, 2016 , ... Talix today announced ... , will be presenting at the 2016 HIMSS Annual Conference & Exhibition, taking ... During his session, “ Coding for Care: Using Data Analytics for Risk Adjustment ...
(Date:2/11/2016)... Rock, AR (PRWEB) , ... February 11, 2016 , ... ... in their community by announcing a new fundraiser in support of a local boy ... also hopes the campaign will bring awareness to, and rally support for, all local ...
(Date:2/11/2016)... ... February 11, 2016 , ... Pixel Film Studios brings the spirit of the ... the Christmas edition of the ProDrop series. Pick and choose from 30 unique designs ... spirit of Christmas using ProDrop's wintry generators. ProDrop Christmas is a Final Cut Pro ...
(Date:2/11/2016)... , ... February 11, 2016 , ... ... exhibiting at the American Academy of Dermatology Annual Meeting at the Walter E. ... is to raise awareness for both the condition of hyperhidrosis (excessive sweating) and ...
Breaking Medicine News(10 mins):
(Date:2/11/2016)... 11, 2016 Transformational M&A achieved through ...   --> Transformational M&A achieved through NPS and ... --> Transformational M&A achieved through NPS and Dyax ... Positioned for future growth with most robust pipeline in Shire ... for future growth with most robust pipeline in Shire ...
(Date:2/11/2016)... Brain Cancer patients in the Mid-South now ... Cancer Center . Optune™, a portable device ... replication causing death of cancer cells, is the first ... a significant extension in overall survival rates for newly ... Center is the only medical center in ...
(Date:2/11/2016)... Jeffrey Zucker , vice president of Feasibility and ... year,s Summit for Clinical Operations Executives (SCOPE), being held Feb. ... Zucker will discuss how sponsors can rebuild and ... Site Study Activation and Performance" portion of the conference. His ... a.m. --> --> In ...
Breaking Medicine Technology: