Navigation Links
Researchers identify the metabolic signaling pathway responsible for dyslipidemia
Date:4/5/2011

(Boston) - Researchers from Boston University School of Medicine (BUSM), including Yu Li, PhD, and other colleagues, have demonstrated that a nutrient sensing pathway is involved in the disruption of cellular lipid homeostasis in obese and insulin resistant mice fed a diet high in fat and sucrose. This nutrient sensing pathway, which is described in the current on-line issue of Cell Metabolism, may also have implications for the health benefits of polyphenols containing foods against fatty liver, hyperlipidemia, and atherosclerosis associated with obesity and type 2 diabetes.

Although it is well known that elevated serum cholesterol and triglyceride levels and fatty liver are caused by increased hepatic lipid synthesis and/or decreased lipid clearance in patients with obesity and diabetes, the underlying mechanistic pathways of these changes remains unknown.

The master regulators of lipid metabolism that were studied are called AMPK and SREBP. The researchers used a molecular biology approach, cell culture system and animal models to indicate that dysregulation of AMPK, an energy sensor, and SREBP, a protein that is important regulator for lipid biosynthesis, are affected in obesity. Mice fed a diet with high fat and high sucrose became obese and had insulin resistance and elevated circulating levels of cholesterol and triglyceride which led to accelerated atherosclerosis. In contrast, dietary supplementation with S17834, a polyphenol, significantly improved the metabolic disorder, lipid levels and atherosclerosis.

"Our findings suggest that AMPK suppression and SREBP activation are a root cause of fatty liver and hyperlipidemia in type 2 diabetes and its associated vascular complications such as atherosclerosis," said senior author Mengwei Zang, MD, PhD, an assistant professor of medicine at BUSM.

According to the researchers the potential health benefits of polyphenols have been gaining increasing interest. "In our studies, AMPK is potently and persistently activated by polyphenols including the natural compound resveratrol, which is present in red wine, grapes and green tea, as well as the synthetic polyphenol S17834, which is a drug candidate provided by Servier Pharmaceutical Company," explained Zang. "AMPK directly suppresses SREBP via its phosphorylation, inhibiting the activity of its target lipogenic enzymes in the liver, and accounting for the protective effects of the polyphenols on fatty liver, blood lipids and diabetic atherosclerosis," she added.

The researchers believe these findings may lead to the development of new drugs that could stop or slow diabetes progression or improve current treatments.


'/>"/>

Contact: Gina DiGravio
gina.digravio@bmc.org
617-638-8480
Boston University Medical Center
Source:Eurekalert

Related medicine news :

1. Researchers map all the fragile sites of the yeast Saccharomyces cerevisiaes genome
2. UH Case Medical Center researchers publish promising findings for advanced cervical cancer
3. Researchers discover new way to kill pediatric brain tumors
4. Researchers Who Discovered First Genes for Stuttering will Present Findings to the National Stuttering Association
5. Researchers create drug to keep tumor growth switched off
6. Urine protein test might help diagnose kidney damage from lupus, UT Southwestern researchers find
7. GUMC researchers say flower power may reduce resistance to breast cancer drug tamoxifen
8. Clemson researchers develop hands-free texting application
9. Researchers find biomarkers in saliva for detection of early-stage pancreatic cancer
10. Researchers chart genomic map spanning over 2 dozen cancers
11. Researchers discover second protective role for tumor-suppressor
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/2/2016)... New York, NY (PRWEB) , ... December 02, 2016 , ... ... Through an exclusive interview with Mediaplanet, Dr. Murthy explains how he was inspired to ... “Early on I learned that medicine is about more than making diagnoses and prescribing ...
(Date:12/2/2016)... ... 02, 2016 , ... Mediaplanet is proud to announce the ... the innovative treatments, therapeutic technologies, and revolutionized nutrition that are helping patients and ... 6 years in the last 3 decades,” says Dr. Valentine Fuster, a world-renowned ...
(Date:12/2/2016)... ... , ... Rijuven Corp launches rejiva ( http://www.rejiva.com ), a unique wearable technology ... health technology on the market can deliver all that rejiva can. , “Rejiva promotes ... their health than the usual heart rate and steps taken”, adds Evens Augustin, CEO ...
(Date:12/2/2016)... ... December 02, 2016 , ... Today CloudMine, a secure, cloud-based ... named the best Sales Team of 2016 as part of the 2016 SIIA ... the Software & Information Industry Association (SIIA), the principal trade association for the ...
(Date:11/30/2016)... ... 2016 , ... "I hate when the mixture of saliva and toothpaste runs ... inventor from Bridgewater, N.J. "I thought that there had to be a way to ... the patent-pending DEFLECTOR to prevent saliva and toothpaste from running down the brush handle ...
Breaking Medicine News(10 mins):
(Date:12/2/2016)... British Columbia , December 2, 2016 - bioLytical lanza ... las nuevas directrices de la OMS     Continue Reading ... ... , , ... de enfermedades infecciosas, ha anunciado hoy que está expandiendo el lanzamiento de su ...
(Date:12/2/2016)... , December 2, 2016 Persistence ... pacemaker market in its upcoming report titled, "Global Market Study on ... Declining CAGR of -1.4% between 2016 and 2024". The global ... in 2015 and this is likely to decline to ... the global cardiac pacemaker market is anticipated to exhibit ...
(Date:12/2/2016)... , Dec. 2, 2016  LifeVac, the revolutionary device ... in the Emergency Response Training and Support Services (ERTSS) ... to have LifeVac become part of the ERTSS mission ... and CEO of LifeVac. "Having an established network of ... effectively will help leverage our efforts to spread LifeVac,s ...
Breaking Medicine Technology: