A study in rats published today in the open access journal BMC Biology shows that an injection of Granulocyte-Colony Stimulating Factor (G-CSF), whose function in the brain is to control the formation of neurons and counteract neurone death, reduces the size of the area affected by a stroke by a third when injected four hours after the onset of the stroke. The study also shows that regular, delayed injections of G-CSF, starting up to three days after experimental stroke, are effective in restoring motor functions in rats.
G-CSF is known to improve recovery after a stroke, and it is currently being tested for use in humans. The BMC Biology study is the first to show that G-CSF can be effective when injected this late after a stroke event.
Armin Schneider from Sygnis Bioscience AG (formerly known as Axaron Bioscience AG) in Heidelberg, Germany, and Wolf-Rüdiger Schäbitz from the Neurology department in Münster, Germany, together with colleagues from the universities of Heidelberg and Erlangen, used rat models of two different types of stroke to assess the effect of an injection of G-CSF on recovery.
The first model was used to assess the impact of G-CSF on the size of the brain area affected by the stroke, which is identified by the presence of dead neurons. In this model, the animals were injected with a single dose of G-CSF at 60µg/kg body weight four hours after the stroke. The researchers demonstrate that the size of the affected area is reduced by 34.5% in the rats that received G-CSF four hours after the stroke.
The second model was used to assess the effect of G-CSF on the functional performance of the animals. In this model, the rats were injected 10 µg/kg body weight of G-CSF, starting 24 or 72 hours after the stroke, for a period of ten days. Rats treated with G-CSF for ten days after the stroke performed significantly better in an exercise designed to test their physical abilities and coordination than rats that had been treated with placebo.
The results of the current study should help to guide the design of future studies in humans.
Juliette Savin | alfa
Water forms 'spine of hydration' around DNA, group finds
26.05.2017 | Cornell University
How herpesviruses win the footrace against the immune system
26.05.2017 | Helmholtz-Zentrum für Infektionsforschung
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy