A new study of genetic and health information from more than 15,000 women uncovered several potential ways that type 2 diabetes and cardiovascular disease may be related at the level of genes, proteins, and fundamental physiology.
Type 2 diabetes (T2D) and cardiovascular disease (CVD) appear to have a lot in common. They share risk factors such as obesity and they often occur together. If they also share the same genetic underpinings, then doctors could devise a way to treat them together too.
With that hope in mind, scientists applied multiple layers of analysis to the genomics of more than 15,000 women. In a new study they report finding eight molecular pathways shared in both diseases as well as several “key driver” genes that appear to orchestrate the gene networks in which these pathways connect and interact.
The scientists started by looking for individual genetic differences in women of three different ethnicities who had either or both of the conditions compared to similar but healthy women – a technique called a Genome Wide Association Study (GWAS).
But the team members didn’t stop there. They also analyzed the women’s genetic differences in the context of the complex pathways in which genes and their protein products interact to affect physiology and health.
“Looking at genes one by one is standard,” said Dr. Simin Liu, professor of epidemiology and medicine in the Brown University School of Public Health and a co-senior author of the study published in the American Heart Association journal Circulation: Cardiovascular Genetics. “But ultimately, the interactions of biology are fundamentally organized in a pathway and network manner.”
The study drew upon the genetic samples and health records of 8,155 black women, 3,494 Hispanic women and 3,697 white women gathered by the Women’s Health Initiative, a major research project funded by the National Heart, Lung and Blood Institute.
In comparing women with CVD and T2D to healthy women, lead author Kei Hang K. Chan, a postdoctoral fellow at the Center for Population Health and Clinical Epidemiology, and the team found key differences in eight pathways regulating cell adhesion (how cells stick within tissues), calcium signaling (how cells communicate), axon guidance (how neurons find their paths to connect with target sites), extracellular matrix (structural support within tissue), and various forms of cardiomyopathy (heart muscle problems).
These were all common across ethnicities. In addition the team found a few pathways that were ethnicity-specific between T2D and CVD.
Chan used five different methodologies to conduct these pathway analyses, reporting only those pathways that showed up as significant by at least two methods.
From there, the analysis moved further by subjecting the genes and their pathways to a network analysis to identify genes that could be “key drivers” of the diseases. The paper highlights a “top ten” list of them.
“These [key driver] genes represent central network genes which, when perturbed, can potentially affect a large number of genes involved in the CVD and T2D pathways and thus exert stronger impact on diseases,” wrote the authors, including co-senior author Xia Yang of the University of California–Los Angeles.
Potential therapeutic targets
To assess whether those genes made sense as key drivers, the research team looked them up in multiple databases that researchers have compiled about the importance of the genes in the health of mouse models.
In the paper they discuss the pathways they implicate in terms of how they could reasonably relate to the disease. For example, axon guidance, normally of note in how developing fetuses build the nervous system, involves mechanisms that also happen to sustain beta cells in the pancreas, which lies at the heart of diabetes. A breakdown in that pathway could leave the cells more vulnerable, affecting the processing of sugars.
With the pathways and key driver genes identified, Liu said, there are now ample opportunities for follow-up, both to refine the understanding of the role these pathways may play in vascular health outcomes and to design and test treatments that may repair them.
“Using a systems biology framework that integrates GWAS, pathways, gene expression, networks, and phenotypic information from both human and mouse populations, we were able to derive novel mechanistic insights and identify potential therapeutic targets,” the researchers wrote.
In addition to Liu, Chan, and Yang, other authors are Dr. Yen-Tsung Huang of Brown; Qingying Meng, Eric Sobel, and Aldons Lusis of UCLA; Chunyuan Wu and Lesley Tinker of the Fred Hutchinson Cancer Research Center in Seattle; and Alexander Reiner of the University of Washington.
The National Institutes of Health, the American Heart Association and the Leducq Foundation supported the research.
Note to Editors:
Editors: Brown University has a fiber link television studio available for domestic and international live and taped interviews, and maintains an ISDN line for radio interviews. For more information, call (401) 863-2476.
David Orenstein | EurekAlert!
Antibiotic effective against drug-resistant bacteria in pediatric skin infections
17.02.2017 | University of California - San Diego
Tiny magnetic implant offers new drug delivery method
14.02.2017 | University of British Columbia
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
17.02.2017 | Medical Engineering
17.02.2017 | Medical Engineering
17.02.2017 | Health and Medicine