SEP 15, 2018 11:55 AM PDT

Data-based Health Management Tool for Aortic Aneurysm

WRITTEN BY: Carmen Leitch

Mistakes happen, even in the genome. Sometimes one of those errors can lead to a chronic illness that a person deals with throughout their lifetime. In many other cases, however, the cause of a disease is far more complex. Now that we know more about the human genome, scientists are looking for ways to identify people who are at risk for getting complex disorders that involve errors in many different genes. Now, researchers at Stanford have used artificial intelligence to create a health management tool they called  HEAL (hierarchical estimate from agnostic learning), for predicting the risk of developing cardiovascular disease from a person's genome.


In this work, which was reported in Cell and is outlined in the video, a massive amount of genetic and health record data was assessed in order to create the tool; it accurately diagnosed abdominal aortic aneurysm (AAA) in 300 patients. AAA has been blamed on a combination of genes and environmental factors and is a leading cause of death in western nations. 

The HEAL tool could be utilized for other diseases as well, suggested the authors. "For example, we know that smoking has a tremendous influence on AAA development," explained co-author Philip S. Tsao, professor of medicine at Stanford University School of Medicine. "If you knew you had a genetic predilection for AAA, you would strongly be advised not to pick up a smoking habit."

Tsao said that other disorders like autism, schizophrenia, diseases of aging, and other cardiovascular diseases might one day be prevented, diagnosed or treated with HEAL. "Our study presents a new framework for disease genome analysis," he noted.

The combined influence of genetics and lifestyle usually predicts disease outcomes, and that can make it difficult to anticipate individual risk or make an early diagnosis for many diseases, said Michael Snyder, study co-author and director of genomics and personalized medicine at Stanford. HEAL's model sets a genomic baseline for a disease and also provides guidelines.

This graphical abstract illustrates how a machine-learning approach integrating personal genomes and electronic health records can predict clinical outcomes associated with abdominal aortic aneurysm and can model the effectiveness of adjusting personal lifestyles based on a given individual's genome. / Credit: Li et al./Cell

HEAL may also free patients from the inconveniences of multiple visits to the doctor to have a discussion. "In the long run, the patient would not visit the office at all unless they need to," Snyder said. "They could mail in their saliva sample, get back their genome sequence, and get return of results through video teleconference."

The tool can create a risk score that would come with lifestyle and treatment recommendations. The risk scores don’t mean a person is definitely getting a disease, warned Snyder. "We need to educate both the physician and patient about that," he added.

Machine learning combined physiological, lifestyle and genome data from 313 AAA patients and 16 healthy controls. The team identified 60 genes that are involved in AAA in some way. They followed up on those genes in tissue and a mouse model.

"These 60 genes form the basis for a risk model for the disease," Snyder said. "It is now possible to determine a person's risk for AAA right from their genome sequence. This is important because the disease is irreversible, and most people discover they have AAA when their aorta bursts, which is usually lethal."

While knowing the details of our genome could provide huge benefits, it may also come with privacy risks. "The genome data belongs to the person and it is up to them to decide how to share it," Snyder added. "If placed in a medical database, it should be secure."

Our genome can indicate the diseases we're at risk for, and how our habits will influence that risk. / Image credit: Adapted from Pixabay


Sources: AAAS/Eurekalert! via Cell Press, Cell

About the Author
  • Experienced research scientist and technical expert with authorships on 28 peer-reviewed publications, traveler to over 60 countries, published photographer and internationally-exhibited painter, volunteer trained in disaster-response, CPR and DV counseling.
You May Also Like
APR 07, 2020
Genetics & Genomics
APR 07, 2020
One Gene Can Accelerate or Slow ALS Progression
Mutations in a single gene had different biological impacts depending on the context.
MAY 05, 2020
Cell & Molecular Biology
MAY 05, 2020
Preprint Suggests Sars-CoV-2 Mutation Makes it More Transmissable
Samples obtained from patients from all over the world have been used to sequence the genomes of the viral strains infec ...
MAY 07, 2020
Genetics & Genomics
MAY 07, 2020
Will the Next Outbreak Come From Cattle?
Many species of Campylobacter bacteria are infectious and can cause a disease called campylobacteriosis in animals and p ...
JUN 22, 2020
Genetics & Genomics
JUN 22, 2020
People That Acquire Genetic Mutations Faster May Not Live as Long
Every cell in our boy carries a copy of the genome in its nucleus. Some cells are constantly replenished, and the genome ...
JUN 22, 2020
Microbiology
JUN 22, 2020
A Human Gut Microbe Can Help Maintain Healthy Cholesterol Levels
The world is full of microorganisms, and our bodies are one of the many places they have colonized. These gut microbes c ...
JUN 24, 2020
Microbiology
JUN 24, 2020
Genetic Variations Can Affect the Gut Microbiome
The small variations in the human genome aren't the only thing that make us unique. We also each carry communities of mi ...
Loading Comments...