Featured Research

from universities, journals, and other organizations

Niacin's Role In Maintaining Good Cholesterol

Date:
June 6, 2008
Source:
American Society for Biochemistry and Molecular Biology
Summary:
A research team has uncovered the likely target of niacin in the liver, which should provide a clearer picture of how this vitamin helps maintain adequate HDL-cholesterol levels in the blood and thus lower the risk of heart disease.

A research team has uncovered the likely target of niacin (vitamin B3) in the liver, which should provide a clearer picture of how this vitamin helps maintain adequate HDL-cholesterol levels in the blood and thus lower the risk of heart disease.

Related Articles


While niacin can increase plasma HDL levels, the mechanism of how it works has been mysterious, although it's believed that niacin does not actually increase HDL production. Recent work had uncovered that a component of ATP synthase (the protein that makes ATP) is present on the surface of liver cells, and this subunit known as the 'beta chain' can take up HDL.

Now, Moti Kashyap and colleagues found that this beta chain is the basis of niacin's effect. They added niacin to samples of human liver cells and found that treatment reduced the presence of Beta chain on the cell surface by ~27%, and as a result HDL uptake was reduced by ~35%. In comparison, nicotinamide, a related molecule with no clinical benefit, had far weaker effects.

These results indicate niacin hinders the liver from removing HDL from the blood, thus maintaining high plasma HDL levels. Importantly, niacin does not affect another major pathway known as "Reverse Cholesterol Transport." Therefore, it maintains HDL levels while still allowing the removal of other cholesterol types, explaining why niacin is especially beneficial.

The work also identifies a new drug target, as no other drug in currently known to raise HDL by inhibiting the surface expression of the beta chain of ATP synthase.

Article: Niacin inhibits surface expression of ATP synthase B-chain in HepG2 cells: implications for raising HDL


Story Source:

The above story is based on materials provided by American Society for Biochemistry and Molecular Biology. Note: Materials may be edited for content and length.


Journal Reference:

  1. Lin-Hua Zhang, Vaijinath S. Kamanna, Michael C. Zhang, and Moti L. Kashyap. Niacin inhibits surface expression of ATP synthase %u03B2 chain in HepG2 cells: implications for raising HDL. J. Lipid Res, 49: 1195-1201 DOI: 10.1194/jlr.M700426-JLR200

Cite This Page:

American Society for Biochemistry and Molecular Biology. "Niacin's Role In Maintaining Good Cholesterol." ScienceDaily. ScienceDaily, 6 June 2008. <www.sciencedaily.com/releases/2008/06/080605150904.htm>.
American Society for Biochemistry and Molecular Biology. (2008, June 6). Niacin's Role In Maintaining Good Cholesterol. ScienceDaily. Retrieved November 28, 2014 from www.sciencedaily.com/releases/2008/06/080605150904.htm
American Society for Biochemistry and Molecular Biology. "Niacin's Role In Maintaining Good Cholesterol." ScienceDaily. www.sciencedaily.com/releases/2008/06/080605150904.htm (accessed November 28, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, November 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Rural India's Low-Cost Sanitary Pad Revolution

Rural India's Low-Cost Sanitary Pad Revolution

AFP (Nov. 28, 2014) — One man hopes his invention -– a machine that produces cheap sanitary pads –- will help empower Indian women. Duration: 01:51 Video provided by AFP
Powered by NewsLook.com
Research on Bats Could Help Develop Drugs Against Ebola

Research on Bats Could Help Develop Drugs Against Ebola

AFP (Nov. 28, 2014) — In Africa's only biosafety level 4 laboratory, scientists have been carrying out experiments on bats to understand how virus like Ebola are being transmitted, and how some of them resist to it. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
Ebola Leaves Orphans Alone in Sierra Leone

Ebola Leaves Orphans Alone in Sierra Leone

AFP (Nov. 27, 2014) — The Ebola epidemic sweeping Sierra Leone is having a profound effect on the country's children, many of whom have been left without any family members to support them. Duration: 01:02 Video provided by AFP
Powered by NewsLook.com
Experimental Ebola Vaccine Shows Promise In Human Trial

Experimental Ebola Vaccine Shows Promise In Human Trial

Newsy (Nov. 27, 2014) — A recent test of a prototype Ebola vaccine generated an immune response to the disease in subjects. 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