At the Institut Curie, two CNRS teams have just reported crucial information on the orientation of cells as they divide. The cell division axis determines not only the position of the daughter cells but also their contents and hence their fate. The researchers have shown that the orientation of division depends on focal adhesions of the cell with its surroundings. They have also identified a new molecule that controls the localization of cellular determinants of so-called asymmetric cell division, thus giving rise to two different cells.
These two studies published in the October and November 2005 issues of Nature Cell Biology shed new light on one of the essential mechanisms in the life of a cell whose deregulation may give rise to cancer.
Division is an essential stage in the life of all cells: it participates in the body’s growth, wound repair, combating infection and in cell turnover. Within our bodies at any given moment some 250,000 million cells are dividing, that is 250,000 million mother cells are in the process of forming 500 000 million daughter cells. As individuals, however, we observe no change. This is because each newly formed cell has a well determined location. The mother cell has a given place among other cells in a tissue and, to avoid perturbing this organization, the daughter cells it produces are also appropriately placed. This very precise positioning is indispensable in maintaining the shape of our tissues and organs. The constraints imposed by the environment influence the division and position of the daughter cells.
Reptile vocalization is surprisingly flexible
30.05.2017 | Max-Planck-Institut für Ornithologie
New photocatalyst speeds up the conversion of carbon dioxide into chemical resources
29.05.2017 | DGIST (Daegu Gyeongbuk Institute of Science and Technology)
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.
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...
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