Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Massive DNA study points to new heart drug targets and a key role for triglycerides

07.10.2013
Open collaboration among global genetic researchers, coordinated by U-M team, provides strong foundation for further research

A global hunt for genes that influence heart disease risk has uncovered 157 changes in human DNA that alter the levels of cholesterol and other blood fats – a discovery that could lead to new medications.

Each of the changes points to genes that can modify levels of cholesterol and other blood fats and are potential drug targets. Many of the changes point to genes not previously linked to blood fats, also called lipids. A surprising number of the variations were also associated with coronary artery disease, type 2 diabetes, obesity, and high blood pressure.

The research also reveals that triglycerides – another type of blood lipid – play a larger role in heart disease risk than previously thought.

The results, published in two new papers appearing simultaneously in the journal Nature Genetics, come from the Global Lipids Genetics Consortium -- a worldwide team of scientists who pooled genetic and clinical information from more than 188,000 people from many countries and heritages.

The analysis of the combined data was led by a team from the University of Michigan Medical School and School of Public Health. They used sophisticated computing and statistical techniques to search for genetic variations that modify blood lipid levels.

The results increase by more than a third the total number of genetic variants linked to blood lipids. All but one of the variants associated with blood lipids are near stretches of DNA that encode proteins.

"These results give us 62 new clues about lipid biology, and more places to look than we had before," says Cristen Willer, Ph.D., the lead author of one paper and an assistant professor of Internal Medicine, Human Genetics and Computational Medicine & Bioinformatics at the U-M Medical School. "Once we take the time to truly understand these clues, we'll have a better understanding of lipid biology and cardiovascular disease -- and potentially new targets for treatment."

But, cautions senior author and U-M School of Public Health Professor Gonçalo Abecasis, Ph.D., it will take much further work to study the implicated genes and to find and test potential drugs that could target them. The consortium's "open science" approach will include publishing further detail online for other researchers to use freely toward this goal.

A further analysis of the massive dataset, published as a letter with lead authors Sekar Kathiresan and Ron Do from Harvard University and the Broad Institute, suggests that triglyceride levels have more impact on cardiovascular disease risk than previously thought.

This analysis found that genetic variations that increase triglyceride or LDL-cholesterol levels are also associated with higher incidence of heart disease. But the analysis also casts further doubt on the role of high density lipoprotein, known commonly as HDL or "good cholesterol", in heart disease risk. In recent years, many drugs that modify HDL cholesterol have failed to show a benefit in preventing heart disease.

"We couldn't have done this on our own. Great scientists are usually very competitive, but it is great when we come together and accelerate progress." says Abecasis, who is the Felix E. Moore Collegiate Professor of Biostatistics, and director of the U-M Computational and Translational Genomics Initiative.

The right tool for the right SNPs

The GLGC is focused on finding, cataloging and analyzing genetic variations that modify blood lipids and heart disease risk. The researchers had access to a new tool – a custom DNA analysis chip they helped design that allows inexpensive analysis of DNA in studies of cardiovascular and metabolic traits.

Combined with genome-wide association study (GWAS) techniques, and the sheer number and diversity of the participants engaged by the researchers, the chip helped make the research possible on a much larger scale than ever before.

U-M graduate students Ellen M. Schmidt and Sebanti Sengupta – studying Bioinformatics and Biostatistics, respectively – played key roles in analysis of data, blending their skills to handle a massive amount of data and feed it through powerful computers.

Next steps

Willer says the new knowledge published in the papers should fuel drug development and experiments in animal models of cardiovascular risk. But in her specialty, probing huge amounts of genetic data, the next steps include looking for "networks" of genes that interact with one another, to try to glean clues about the function of the lesser-understood genes.

Looking for rare genetic variants that are linked with the most severe forms of lipid disorder and heart disease is another challenge, she says. The overlap between these rare, serious variations, and the more common but less severe variations, could help understanding of basic lipid biology.

In addition to the U-M authors mentioned above, the research team included U-M biostatistics professor Michael Boehnke, Ph.D., and dozens of scientists and students from around the world. A full list of authors and affiliations is on each of the papers.

Dr. Willer holds a Pathway to Independence Award (K99/R00) from the National Heart, Lung, and Blood Institute. Ellen Schmidt holds a National Science Foundation Open Data fellowship. Other funding came from the funders of each of the genetic cohort studies that contributed data to the GLGC.

Reference: Nature Genetics, doi:10.1038/ng.2797 and doi:10.1038/ng.2795

Kara Gavin | EurekAlert!
Further information:
http://www.umich.edu

More articles from Life Sciences:

nachricht MicroRNA helps cancer evade immune system
19.09.2017 | Salk Institute

nachricht Ruby: Jacobs University scientists are collaborating in the development of a new type of chocolate
18.09.2017 | Jacobs University Bremen gGmbH

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Ultrafast snapshots of relaxing electrons in solids

Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!

When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...

Im Focus: Quantum Sensors Decipher Magnetic Ordering in a New Semiconducting Material

For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.

Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...

Im Focus: Fast, convenient & standardized: New lab innovation for automated tissue engineering & drug

MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems Holding GmbH about commercial use of a multi-well tissue plate for automated and reliable tissue engineering & drug testing.

MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems...

Im Focus: Silencing bacteria

HZI researchers pave the way for new agents that render hospital pathogens mute

Pathogenic bacteria are becoming resistant to common antibiotics to an ever increasing degree. One of the most difficult germs is Pseudomonas aeruginosa, a...

Im Focus: Artificial Enzymes for Hydrogen Conversion

Scientists from the MPI for Chemical Energy Conversion report in the first issue of the new journal JOULE.

Cell Press has just released the first issue of Joule, a new journal dedicated to sustainable energy research. In this issue James Birrell, Olaf Rüdiger,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

“Lasers in Composites Symposium” in Aachen – from Science to Application

19.09.2017 | Event News

I-ESA 2018 – Call for Papers

12.09.2017 | Event News

EMBO at Basel Life, a new conference on current and emerging life science research

06.09.2017 | Event News

 
Latest News

“Lasers in Composites Symposium” in Aachen – from Science to Application

19.09.2017 | Event News

New quantum phenomena in graphene superlattices

19.09.2017 | Physics and Astronomy

A simple additive to improve film quality

19.09.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>