It has long been thought that cells that regenerate tissue do so by regressing to a developmentally younger state. Now two University of Washington researchers have demonstrated that cells can regenerate without becoming "younger."
Biologists for years have studied stem cells, the ones responsible for replenishing and regenerating an organisms structures, aiming to find the means to selectively regenerate tissue such as that of the heart or liver in much the same way that the body heals a broken leg.
Much hope rests with non-embryonic stem cells, which can renew themselves and, within limits, produce all the specialized cell types from the type of tissue in which they originate. But scientists have puzzled over just how such cells function, how they can be spurred to create new tissue, and just when in their development it is determined what tissue they can produce.
Gerold Schubiger, a UW biology professor, and Anne Sustar, a research technician in his laboratory, used groups of cells, called imaginal discs, in fruit fly larvae to provide an easily controlled system to study regeneration. Imaginal discs convert genetic information that determines the specific tissue into which the cells will develop in the adult fly. For example, leg discs form only adult legs and wing discs form only adult wings. Normally, all of those cells develop into that specific tissue, either when the fly reaches the adult stage or when regenerating a lost structure, such as parts of a leg disc.
Vince Stricherz | EurekAlert!
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Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
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By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
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COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
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'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
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