The results of an international clinical trial led by Duke University Medical Center researchers has shown that a new drug is not a suitable replacement for protamine, a drug that has been used for more than 40 years after coronary artery bypass surgery to return thinned blood to its normal state.
While protamine is effective in reversing the blood-thinning properties of heparin, recent studies have shown that its use can cause changes in blood pressure which have been linked to increased mortality in some patients. In addition to its negative effects on blood pressure, protamine can also depress heart function, activate certain immune responses, and lead to pulmonary hypertension, the researchers said. However, they emphasized, the drawbacks of protamine do not compromise the overall success of heart bypass surgery, and patients should not be overly concerned by those drawbacks.
The latest candidate alternative to protamine is heparinase I, a compound naturally produced by Flavobacterium heparinum, a bacterium commonly found in soil and water. The bacterial enzyme from which heparinase I is derived deactivates heparin through a mechanism different than protamine.
Richard Merritt | EurekAlert!
Fine organic particles in the atmosphere are more often solid glass beads than liquid oil droplets
21.04.2017 | Max-Planck-Institut für Chemie
Study overturns seminal research about the developing nervous system
21.04.2017 | University of California - Los Angeles Health Sciences
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
Two researchers at Heidelberg University have developed a model system that enables a better understanding of the processes in a quantum-physical experiment...
Glaciers might seem rather inhospitable environments. However, they are home to a diverse and vibrant microbial community. It’s becoming increasingly clear that they play a bigger role in the carbon cycle than previously thought.
A new study, now published in the journal Nature Geoscience, shows how microbial communities in melting glaciers contribute to the Earth’s carbon cycle, a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
21.04.2017 | Physics and Astronomy
21.04.2017 | Health and Medicine
21.04.2017 | Physics and Astronomy