Myocardial infarction, caused by coronary artery occlusion, can lead up to loss of muscle tissue of the heart and functional detriment, even at times where rapid reperfusion strategies like PTCA or thrombolysis are at hand. In the study presented here, we investigated embryonic endothelial progenitor cells as therapy for ischemia reperfusion injury in a large animal model (pig). This model, which induces an infarct of predictable size in a pig heart, was used to test the cardioprotective potential of the embryonic cells, since adult endothelial progenitor cells (EPCs) have been used in similar models with success and are utilized in ongoing patient studies.
Endothelial progenitor cells are cells which are able to differentiate into endothelial cells and replace the inner vascular wall.In this study, we used 5x106 embryonic endothelial progenitor cells, a number relatively modest with respect to the size of the targeted infarct region. To compensate for this modest cell number, we used a regional delivery system, called retroinfusion, which infuses the cells through the vein draining the infarct region. (Previous studies had shown a substantial increase of efficacy using this application mode).
We now found that indeed retroinfusion of 5x106 embryonic EPCs sufficed to reduce infarct size and improve regional myocardial function in the ischemic area. Interestingly, systemic application of the same number of cells had no significant effect, indicating the relevance of the regional application. The superiority of the regional delivery was confirmed in tests using radioactively labeled cells, where retroinfusion yielded a sixfold higher amount of recruited cells in the heart than systemic application.
Camilla Dormer | alfa
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The world's highest gain high power laser amplifier - by many orders of magnitude - has been developed in research led at the University of Strathclyde.
The researchers demonstrated the feasibility of using plasma to amplify short laser pulses of picojoule-level energy up to 100 millijoules, which is a 'gain'...
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.
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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.
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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...
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