Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researchers surprised to find fatty liver disease poses no excess risk for death

24.11.2011
Condition prevalent among those with heart disease and obesity

Non-alcoholic fatty liver disease (NAFLD) is a common condition associated with obesity and heart disease long thought to undermine health and longevity. But a new study by Johns Hopkins researchers suggests the condition does not affect survival.

A report on the study was published online last week in BMJ, the British medical journal.

"Physicians have considered fatty liver disease a really worrisome risk factor for cardiovascular disease," says study leader Mariana Lazo, M.D., Ph.D., a postdoctoral fellow at the Johns Hopkins University School of Medicine's Welch Center for Prevention, Epidemiology, and Clinical Research. "Our data analysis shows this doesn't appear to be the case. We were surprised to say the least because we expected to learn by how much non-alcoholic fatty liver disease increased the risk of death and instead found the answer was not at all."

Using health information collected from 11,371 Americans between 1994 and 1998 and followed for up to 18 years as part of the Third National Health and Nutrition Examination Survey (NHANES III), the researchers checked liver enzyme levels and ultrasound tests for evidence of NAFLD, and ultimately looked at death rates associated with NAFLD. The participants ranged in age from 20 to 74 during the data collection years. Because the ultrasounds were originally taken to assess gallbladder health, Lazo and colleagues from Johns Hopkins looked at each recording to determine the presence of fat in each person's liver. People whose livers are 5 percent fat or more are considered to have NAFLD.

The Johns Hopkins team found no increase in mortality among those with NAFLD, which was identified in approximately 20 percent of the NHANES participants. At the end of the follow-up period, mortality from all causes was 22 percent, or 1,836 individuals. Cardiovascular disease was the cause of death for 716 participants, cancer for 480 and liver disease for 44.

Although the researchers found no increase in deaths, Lazo says further study is needed to determine whether more advanced NAFLD has serious long-term consequences for the liver, a vital organ that turns what we eat and drink into nutrients and filters harmful substances from the blood.

NAFLD, which some researchers have called the nation's next epidemic, is characterized by the liver's inability to break down fats and fatty build up in the organ. Found in roughly one in three Americans, it is most prevalent in those who are obese, and those with diabetes and cardiovascular disease. The spectrum of disease ranges from simple fat build-up to inflammation to the scarring and poor liver function that characterize cirrhosis. Chronic liver disease has long been associated with long-term alcohol consumption, but as the name suggests, NAFLD is found in those who are not heavy drinkers.

"We don't yet know why mortality is not affected or whether there might be some actual protective effect of non-alcoholic fatty liver disease," she says, "but it looks like the liver's ability to accumulate fat may somehow shield the body from the detrimental effects of other health problems such as obesity and diabetes," she says.

There is no treatment for NAFLD, other than lifestyle changes, including weight loss, and only a liver biopsy can determine how serious NAFLD is. Lazo says she hopes new methods are developed that more easily identify more advanced stages of NAFLD, which may not be harmless.

Still, she says, her research suggests that with respect to long-term survival of people with non-alcoholic fatty liver disease, "it may not matter if you have the disease or not."

The research was supported by grants from the National Institute of Diabetes and Digestive Diseases and the American Diabetes Association.

Other Johns Hopkins researchers involved in the study include Ruben Hernaez, M.D., Ph.D.; Susanne Bonekamp, Ph.D.; Ihab R. Kamel, M.D., Ph.D.; Frederick L. Brancati, M.D.; Eliseo Guallar, M.D., M.P.H.; and Jeanne M. Clark, M.D., M.P.H.

For more information: http://www.jhsph.edu/welchcenter/

Stephanie Desmon | EurekAlert!
Further information:
http://www.jhmi.edu

More articles from Health and Medicine:

nachricht Millions through license revenues
27.04.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht New High-Performance Center Translational Medical Engineering
26.04.2017 | Fraunhofer ITEM

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Making lightweight construction suitable for series production

More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.

Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...

Im Focus: Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Fighting drug resistant tuberculosis – InfectoGnostics meets MYCO-NET² partners in Peru

28.04.2017 | Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

 
Latest News

Wireless power can drive tiny electronic devices in the GI tract

28.04.2017 | Medical Engineering

Ice cave in Transylvania yields window into region's past

28.04.2017 | Earth Sciences

Nose2Brain – Better Therapy for Multiple Sclerosis

28.04.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>