The enzyme – glutathione peroxidase, or GPx3 – is a natural antioxidant that helps protect organisms from oxidant injury and helps the body naturally repair itself. Researchers have found that patients with high levels of good cholesterol, the GPx3 enzyme does not make a significant difference.
However, those patients with low levels of good cholesterol, the GPx3 enzyme could potentially be a big benefit. The enzyme's link to cardiovascular disease may also help determine cardiovascular risk in patients with low levels of good cholesterol and low levels of the protective GPx3.
The new research, published today by PLoS One, supports the view that natural antioxidants may offer the human body profound benefits.
"In our study, we found that people with high levels of the GPx3 enzyme and low levels of good cholesterol were six times less likely to develop cardiovascular disease than people with low levels of both," said lead author Jordan L. Holtzman, M.D., Ph.D., professor of pharmacology and medicine within the University of Minnesota Medical School. "This GPx3 enzyme gives us a good reason to believe that natural antioxidants like GPx3 are good for heart health."
The combination of low HDL and low GPx3 affects an estimated 50 million people – one in four adults – in the U.S. This condition can lead to fatal heart attacks and strokes. Researchers continue to look for new ways to better predict who is at risk for these diseases and how patients can limit the impact of the disease once it's diagnosed.
"It's important to point out that people should not rush out to their doctors and demand testing for the GPx3 enzyme," said Holtzman. "But in time, we hope that measuring this enzyme will be a common blood test when determining whether a patient is at risk for cardiovascular disease, including heart attacks and strokes."
To arrive at his results, Holtzman and his colleagues studied the three major risk factors for cardiovascular disease: hypertension, smoking and high cholesterol. Data suggests that those with low levels of HDL and GPx3 were six times more likely to die from cardiovascular disease, including heart attack or stroke, than those with low levels of HDL and high levels of GPx3.
The study examined 130 stored samples from the Minnesota Heart Survey from participants who died of cardiovascular disease after 5-12 years of follow-up care. The ages of patients studied ranged from 26-85 years old. Their data was compared to 240 control samples.
"This is an important enzyme for people with low HDL cholesterol," said Holtzman. "We think further research will be important in determining the future role of GPx3 and what drugs may serve to increase its activity in the blood."
The research reported in this publication was supported by the National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD (RO1-HL23727), the Mayo Chair Endowment, School of Public Health, University of Minnesota (DJ), and grant no. 2005R013 from the Netherlands Heart Foundation, Den Haag, the Netherlands (BB).
About the Medical School:
The University of Minnesota Medical School, with its two campuses in the Twin Cities and Duluth, is a leading educator of the next generation of physicians. Our graduates and the school's 3,800 faculty physicians and scientists advance patient care, discover biomedical research breakthroughs with more than $180 million in sponsored research annually, and enhance health through world-class patient care for the state of Minnesota and beyond. Visit www.med.umn.edu to learn more.
Matt DePoint | EurekAlert!
Scientists use nanoparticle-delivered gene therapy to inhibit blinding eye disease in rodents
08.07.2020 | Johns Hopkins Medicine
Deconstructing glioblastoma complexity reveals its pattern of development
08.07.2020 | McGill University
New insight into the spin behavior in an exotic state of matter puts us closer to next-generation spintronic devices
Aside from the deep understanding of the natural world that quantum physics theory offers, scientists worldwide are working tirelessly to bring forth a...
Kiel physics team observed extremely fast electronic changes in real time in a special material class
In physics, they are currently the subject of intensive research; in electronics, they could enable completely new functions. So-called topological materials...
Solar cells based on perovskite compounds could soon make electricity generation from sunlight even more efficient and cheaper. The laboratory efficiency of these perovskite solar cells already exceeds that of the well-known silicon solar cells. An international team led by Stefan Weber from the Max Planck Institute for Polymer Research (MPI-P) in Mainz has found microscopic structures in perovskite crystals that can guide the charge transport in the solar cell. Clever alignment of these "electron highways" could make perovskite solar cells even more powerful.
Solar cells convert sunlight into electricity. During this process, the electrons of the material inside the cell absorb the energy of the light....
Empa researchers have succeeded in applying aerogels to microelectronics: Aerogels based on cellulose nanofibers can effectively shield electromagnetic radiation over a wide frequency range – and they are unrivalled in terms of weight.
Electric motors and electronic devices generate electromagnetic fields that sometimes have to be shielded in order not to affect neighboring electronic...
A promising operating mode for the plasma of a future power plant has been developed at the ASDEX Upgrade fusion device at Max Planck Institute for Plasma...
07.07.2020 | Event News
02.07.2020 | Event News
19.05.2020 | Event News
10.07.2020 | Life Sciences
10.07.2020 | Materials Sciences
10.07.2020 | Life Sciences