Featured Research

from universities, journals, and other organizations

No firm conclusions about HDL cholesterol can be drawn from JUPITER sub-analysis

Date:
July 23, 2010
Source:
European Society of Cardiology
Summary:
The European Society of Cardiology is concerned that interpretations of a paper about cholesterol could act to deter ongoing research efforts into developing new therapeutic strategies to increase high density lipoprotein (HDL) cholesterol. Caution, the ESC experts advise, should be displayed in the interpretation of the results.

The European Society of Cardiology (ESC) is concerned that interpretations of a paper about cholesterol, published in the Lancet, could act to deter ongoing research efforts into developing new therapeutic strategies to increase high density lipoprotein (HDL) cholesterol. Caution, the ESC experts advise, should be displayed in the interpretation of the results.

In the Lancet study, Paul Ridker and colleagues, from Brigham and Women's Hospital (Boston, MA, USA), undertook a retrospective post-hoc analysis of the JUPITER trial. The results show that if a normal, healthy individual has level of low density lipoprotein (LDL), known as "bad cholesterol," substantially lowered with a potent statin, then the level of HDL "good cholesterol" in that person no longer bears any relation to the remaining cardiovascular risk.

The original JUPITER trial was designed to answer the critical question of whether rosuvastatin prevents cardiovascular disease among healthy people with normal LDL cholesterol levels, but increased levels of high-sensitivity C-reactive protein, a marker of chronic low level inflammation, considered a new risk factor for cardiovascular events.

The current Lancet study showed that when 17,802 subjects were divided into quartiles of HDL cholesterol concentrations, HDL cholesterol concentrations were inversely related to vascular risk at the end of study for individuals randomised to placebo, with the top quartile having a 46% reduced risk compared to the bottom quartile (p=0.0039). In contrast, however, among those subjects given active treatment with rosuvastatin, vascular risk was calculated to be similar for subjects in both the top and bottom HDL quartiles (p=0.82)

"Although measurement of HDL-cholesterol concentration is useful as part of initial cardiovascular risk assessment, HDL-cholesterol concentrations are not predictive of residual vascular risk among patients treated with potent statin therapy who attain very low concentrations of LDL cholesterol," the authors of the study conclude.

ESC spokesperson Professor Dan Atar, from Oslo University Hospital, Norway, believes there are dangers in interpreting the study as showing that raising HDL levels produces no beneficial cardiovascular effects. "It's a matter of statistics. If you're looking at populations with a very low incidence of cardiovascular events, and then with an intervention of any kind you reduce the risk of events even further, it's logical that you'll washout the influence of any other effect. These patients already have achieved such low levels of LDL that no other marker will prevail as a predictor of the few remaining events."

He added that he had concerns that readers of the paper might not appreciate that more data was needed before the scientific community could make a qualified decision about whether raising HDL levels was beneficial or not. "With subgroup analyses, such as the one presented here, you just can't make such judgements," he said.

In fact, previous studies, such as the Helsinki Heart Study and the VA-HIT Study, have been successful in raising HDL and reducing cardiovascular events, using gemfibrozil, however this agent also concomitantly lowers LDL. Additionally, the drug nicacin has been shown to be effective at elevating HDL and reducing cardiovascular morbidity in the Coronary Drug Project Study, but this strategy could not easily be implemented into clinical practice due to unpleasant side effects, notably flushing. It is hoped that laropiprant, a novel flushing pathway inhibitor, will overcome this limitation.

A clearer indication of the benefit of raising HDL, Atar added, will come from the ongoing phase III Heart Protection Study 2-Treatment of HDL to Reduce the Incidence of Vascular Events (HPS2-THRIVE), which has enrolled 25,000 patients to investigate whether the combination of niacin/laropiprant can further reduce the risk for myocardial infarction, stroke and the need for revascularisation in patients already treated to lower LDL.


Story Source:

The above story is based on materials provided by European Society of Cardiology. Note: Materials may be edited for content and length.


Cite This Page:

European Society of Cardiology. "No firm conclusions about HDL cholesterol can be drawn from JUPITER sub-analysis." ScienceDaily. ScienceDaily, 23 July 2010. <www.sciencedaily.com/releases/2010/07/100723123940.htm>.
European Society of Cardiology. (2010, July 23). No firm conclusions about HDL cholesterol can be drawn from JUPITER sub-analysis. ScienceDaily. Retrieved July 23, 2014 from www.sciencedaily.com/releases/2010/07/100723123940.htm
European Society of Cardiology. "No firm conclusions about HDL cholesterol can be drawn from JUPITER sub-analysis." ScienceDaily. www.sciencedaily.com/releases/2010/07/100723123940.htm (accessed July 23, 2014).

Share This




More Health & Medicine News

Wednesday, July 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Courts Conflicted Over Healthcare Law

Courts Conflicted Over Healthcare Law

AP (July 22, 2014) Two federal appeals courts issued conflicting rulings Tuesday on the legality of the federally-run healthcare exchange that operates in 36 states. (July 22) Video provided by AP
Powered by NewsLook.com
Why Do People Believe We Only Use 10 Percent Of Our Brains?

Why Do People Believe We Only Use 10 Percent Of Our Brains?

Newsy (July 22, 2014) The new sci-fi thriller "Lucy" is making people question whether we really use all our brainpower. But, as scientists have insisted for years, we do. Video provided by Newsy
Powered by NewsLook.com
Scientists Find New Way To Make Human Platelets

Scientists Find New Way To Make Human Platelets

Newsy (July 22, 2014) Boston scientists have discovered a new way to create fully functioning human platelets using a bioreactor and human stem cells. Video provided by Newsy
Powered by NewsLook.com
Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

TheStreet (July 21, 2014) New research shows Gilead Science's drug Sovaldi helps in curing hepatitis C in those who suffer from HIV. In a medical study, the combination of Gilead's Hep C drug with anti-viral drug Ribavirin cured 76% of HIV-positive patients suffering from the most common hepatitis C strain. Hepatitis C and related complications have been a top cause of death in HIV-positive patients. Typical medication used to treat the disease, including interferon proteins, tended to react badly with HIV drugs. However, Sovaldi's %1,000-a-pill price tag could limit the number of patients able to access the treatment. TheStreet's Keris Lahiff reports from New York. Video provided by TheStreet
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