Featured Research

from universities, journals, and other organizations

Link to increased atherosclerosis risk in lupus patients uncovered

Date:
January 27, 2011
Source:
Wiley - Blackwell
Summary:
Researchers have demonstrated interferon-alpha (IFN-α) is associated with increased risk of atherosclerosis in patients with systemic lupus erythematosus (SLE). For the first time, IFN-α priming was shown to promote lipid uptake and foam cell formation—a crucial step in plaque build-up. This activation of the IFN signaling pathway may be linked to the premature atherosclerosis risk in SLE.

Researchers in China have demonstrated interferon-alpha (IFN-α) is associated with increased risk of atherosclerosis in patients with systemic lupus erythematosus (SLE). For the first time, IFN-α priming was shown to promote lipid uptake and foam cell formation -- a crucial step in plaque build-up. This activation of the IFN signaling pathway may be linked to the premature atherosclerosis risk in SLE.

Full findings of this novel study are available in the February issue of Arthritis & Rheumatism, a journal published by Wiley-Blackwell on behalf of the American College of Rheumatology.

SLE or lupus is a chronic, multisystem autoimmune disease that causes wide-spread inflammation in the body and can affect multiple organs. The Lupus Foundation of American estimates that up to 1.5 million Americans and more than 5 million people worldwide have some form of lupus (systemic, discoid, or drug-induced), which occurs more frequently in women. While prior studies have established that SLE patients demonstrated an increased incidence of premature atherosclerosis, they do not explain what may cause the greater cardiovascular risk.

"Although traditional risk factors such as hypertension, high cholesterol, and diabetes mellitus are thought to be important in mediating an increased risk for atherosclerosis in SLE, they fail to adequately explain the higher incidence of atherosclerotic diseases in SLE patients," said Nan Shen, M.D., Director of the Shanghai Institute of Rheumatology at Ren Ji Hospital and lead author of the study. To further investigate the cause of premature atherosclerosis in SLE, researchers recruited 42 patients with lupus and 42 healthy volunteers for their study. Blood samples were taken from all participants and peripheral blood monocytes were isolated and analyzed. Peripheral blood mononuclear cells (PBMCs) play an important role in the immune system's ability to fight infection.

Research data suggested that IFN-α priming promoted the formation of macrophage-derived foam cells in SLE patients. Specifically, researchers found macrophage scavenger receptor A (SR-A) expression by IFN-α was associated with enhanced lipid uptake and an increased number of foam cells. The initiating force for the occurrence of atherosclerosis is the accumulation of cholesterol-laden foam cells in the arterial wall. The team also established that expression of SR-A was significantly elevated in PBMCs of lupus patients and was positively correlated with IFN signaling activity.

Dr. Shen concluded, "Our findings further understanding of the mechanisms involved in the development of atherosclerosis in autoimmune disease and may provide potential therapeutic targets for the prevention and treatment of premature cardiovascular disease in lupus patients."


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. Jia Li, Qiong Fu, Huijuan Cui, Bo Qu, Wen Pan, Nan Shen, Chunde Bao. Interferon-α priming promotes lipid uptake and macrophage-derived foam cell formation: A novel link between interferon-α and atherosclerosis in lupus. Arthritis & Rheumatism, 2010; DOI: 10.1002/art.30165

Cite This Page:

Wiley - Blackwell. "Link to increased atherosclerosis risk in lupus patients uncovered." ScienceDaily. ScienceDaily, 27 January 2011. <www.sciencedaily.com/releases/2011/01/110127090445.htm>.
Wiley - Blackwell. (2011, January 27). Link to increased atherosclerosis risk in lupus patients uncovered. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2011/01/110127090445.htm
Wiley - Blackwell. "Link to increased atherosclerosis risk in lupus patients uncovered." ScienceDaily. www.sciencedaily.com/releases/2011/01/110127090445.htm (accessed July 31, 2014).

Share This




More Health & Medicine News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Health Insurers' Profits Slide

Health Insurers' Profits Slide

Reuters - Business Video Online (July 30, 2014) Obamacare-related costs were said to be behind the profit plunge at Wellpoint and Humana, but Wellpoint sees the new exchanges boosting its earnings for the full year. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Concern Grows Over Worsening Ebola Crisis

Concern Grows Over Worsening Ebola Crisis

AFP (July 30, 2014) Pan-African airline ASKY has suspended all flights to and from the capitals of Liberia and Sierra Leone amid the worsening Ebola health crisis, which has so far caused 672 deaths in Guinea, Liberia and Sierra Leone. Duration: 00:43 Video provided by AFP
Powered by NewsLook.com
At Least 20 Chikungunya Cases in New Jersey

At Least 20 Chikungunya Cases in New Jersey

AP (July 30, 2014) At least 20 New Jersey residents have tested positive for chikungunya, a mosquito-borne virus that has spread through the Caribbean. (July 30) Video provided by AP
Powered by NewsLook.com
Xtreme Eating: Your Daily Caloric Intake All On One Plate

Xtreme Eating: Your Daily Caloric Intake All On One Plate

Newsy (July 30, 2014) The Center for Science in the Public Interest released its 2014 list of single meals with whopping calorie counts. 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:
from the past week

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