Featured Research

from universities, journals, and other organizations

Nutritional Supplement, SAMe, Effective In Preventing Formation Of Primary Liver Cancer In Rats

Date:
August 2, 2009
Source:
Wiley-Blackwell
Summary:
A new study investigated the effectiveness of S-adenosylmethionine in the prevention and treatment of hepatocellular carcinoma or primary liver cancer. SAMe, a widely available nutritional supplement, with little known side effects, was found to be effective in preventing the formation of HCC in rats. However, high enough levels of SAMe were not attainable to successfully treat established HCC.

A new study investigated the effectiveness of S-adenosylmethionine (SAMe) in the prevention and treatment of hepatocellular carcinoma (HCC) or primary liver cancer. SAMe, a widely available nutritional supplement, with little known side effects, was found to be effective in preventing the formation of HCC in rats. However, high enough levels of SAMe were not attainable to successfully treat established HCC.

The findings are available in the August issue of Hepatology.

HCC is the fifth most common cancer and the third most frequent cause of cancer death worldwide. Risk factors for HCC include chronic infection with hepatitis B virus, hepatitis C virus (HCV), dietary aflatoxin, excessive alcohol use, cigarette smoking, diabetes and obesity. The overall 5-year survival for HCC patients is less than 10% and the disease rate is expected to rise due to the high prevalence of HCV in many areas of the world.

Shelly Lu, M.D., of the Keck School of Medicine at the University of Southern California, and colleagues studied the effects of SAMe on chemoprevention and treatment of HCC. In the U.S. the incidence of HCC doubled from 1979 to 1995 and the number of HCC cases for the following 20 to 30 years is projected to increase. “Given these projections, there is a tremendous interest in developing effective chemoprevention strategies,” said Dr. Lu. “And an important property of SAMe that makes it an attractive agent for chemoprevention and treatment of HCC is its ability to selectively kill liver cancer cells,” she added.

During the study researchers injected H4IIE cells into rats and found a 1cm tumor developed in the liver two weeks after injection. A regimen of IV SAMe was started one day after injecting the cells and continued for ten days. The researchers monitored the animals using MRI, ultrasound, and visual inspection to assess the liver tumors. “Treatment with IV SAMe by continuous infusion significantly reduced the tumor size and significantly prevented tumor development after 11 days,” researchers discovered.

Researchers found that if SAMe infusion was started after sizable tumors had already formed it failed to reduce the rate of tumor growth after 24 days of treatment. This is because of a compensatory response of the liver to metabolize SAMe and prevent its accumulation. “The observation that SAMe failed to exert any therapeutic effect in already established HCC is disappointing,” said Dr. Lu. “But whether SAMe can be effective in treating HCC in man remains unclear because this compensatory mechanism may not work properly in human HCC. Nevertheless, effectiveness of SAMe in chemoprevention of human HCC deserves study now.”


Story Source:

The above story is based on materials provided by Wiley-Blackwell. Note: Materials may be edited for content and length.


Journal Reference:

  1. Lu et al. S-adenosylmethionine in the chemoprevention and treatment of hepatocellular carcinoma in a rat model. Hepatology, 2009; 50 (2): 462 DOI: 10.1002/hep.22990

Cite This Page:

Wiley-Blackwell. "Nutritional Supplement, SAMe, Effective In Preventing Formation Of Primary Liver Cancer In Rats." ScienceDaily. ScienceDaily, 2 August 2009. <www.sciencedaily.com/releases/2009/07/090730111156.htm>.
Wiley-Blackwell. (2009, August 2). Nutritional Supplement, SAMe, Effective In Preventing Formation Of Primary Liver Cancer In Rats. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2009/07/090730111156.htm
Wiley-Blackwell. "Nutritional Supplement, SAMe, Effective In Preventing Formation Of Primary Liver Cancer In Rats." ScienceDaily. www.sciencedaily.com/releases/2009/07/090730111156.htm (accessed October 1, 2014).

Share This



More Health & Medicine News

Wednesday, October 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Some Positive Ebola News: Outbreak 'Contained' In Nigeria

Some Positive Ebola News: Outbreak 'Contained' In Nigeria

Newsy (Sep. 30, 2014) The CDC says a new case of Ebola has not been reported in Nigeria for more than 21 days, leading to hopes the outbreak might be nearing its end. Video provided by Newsy
Powered by NewsLook.com
UN Ebola Mission Head: Immediate Action Is Crucial

UN Ebola Mission Head: Immediate Action Is Crucial

AFP (Sep. 30, 2014) The newly appointed head of the United Nations Mission for Ebola Emergency Response (UNMEER), Anthony Banbury, outlines operations to tackle the virus. Duration: 00:39 Video provided by AFP
Powered by NewsLook.com
CDC Confirms First Case of Ebola in US

CDC Confirms First Case of Ebola in US

AP (Sep. 30, 2014) The CDC has confirmed the first diagnosed case of Ebola in the United States. The patient is being treated at a Dallas hospital after traveling earlier this month from Liberia. (Sept. 30) Video provided by AP
Powered by NewsLook.com
New Breast Cancer Drug Extends Lives In Clinical Trial

New Breast Cancer Drug Extends Lives In Clinical Trial

Newsy (Sep. 30, 2014) In a clinical trial, breast cancer patients lived an average of 15 months longer when they received new drug Perjeta along with Herceptin. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins