INFORMATION:
http://www.aerzteblatt.de/pdf.asp?id=169088
Cell-assisted lipotransfer: Safety not demonstrated
2015-04-28
(Press-News.org) In reconstructive and esthetic medicine, a technique called cell-assisted lipotransfer, i.e., the grafting of the patient's own adipose tissue to another site in the body after mixing with autologous stem cells, is being increasingly used and aggressively promoted. This technique has not been shown to yield better outcomes than conventional lipotransfer without cell enrichment, as discussed by Soraya Grabin and coauthors in a current article in Deutsches Ärzteblatt International (Dtsch Arztebl Int 2015; 112: 255-61). The vitally important matter of safety--in particular, the question whether the added stem cells might promote tumor growth--has not yet been settled either.
In conventional autologous fat grafting, which has a long tradition in reconstructive and esthetic surgery, adipose tissue is aspirated from the patient's subcutaneous fat, cleansed, and then transplanted to the desired site. The admixture of stem cells to the graft in cell-assisted lipotransfer is intended to improve the outcome, but the pertinent clinical trials carried out to date have not shown that cell-assisted lipotransfer is generally superior to conventional autologous lipotransfer. The authors consider it a critical problem that the oncological risks of stem-cell treatment are still unclear. The similarity of stem cells to cancer cells makes safety a major concern that requires careful study. The long-term effects of cell-assisted lipotransfer are not yet known either. The authors emphasize that, for now, cell-assisted lipotransfer should only be performed in clinical trials.
ELSE PRESS RELEASES FROM THIS DATE:
Researchers develop new computer-based vision screening test for young children
2015-04-28
San Francisco, CA, April 28, 2015 - Many eye disorders in young children are asymptomatic and may remain undetected without testing. Since effective treatments are available for many of those conditions, early identification and intervention are critical to prevent potentially permanent vision problems. A new report published in the Journal of the American Association for Pediatric Ophthalmology and Strabismus (AAPOS) describes the effectiveness of a new computer-based vision-screening test, the Jaeb Visual Acuity Screener (JVAS), which is suitable for use in schools and ...
Human hunting weapons may not have caused the demise of the Neanderthals
2015-04-28
Amsterdam, April 28, 2015 - The demise of Neanderthals may have nothing to do with innovative hunting weapons carried by humans from west Asia, according to a new study published in the Journal of Human Evolution. The researchers, from Nagoya University and The University of Tokyo, Japan, say their findings mean that we may need to rethink the reasons humans survived Neanderthals - and that we may not have behaved as differently as we thought.
The researchers looked at innovative stone weapons used by humans about 42,000-34,000 years ago. Traditionally, anthropologists ...
Burmese python habitat use patterns may help control efforts
2015-04-28
EVERGLADES NATIONAL PARK, Fla.-- The largest and longest Burmese Python tracking study of its kind -- here or in its native range -- is providing researchers and resource managers new information that may help target control efforts of this invasive snake, according to a new study led by the U.S. Geological Survey.
Among the findings, scientists have identified the size of a Burmese python's home range and discovered they share some "common areas" that multiple snakes use.
"These high-use areas may be optimal locations for control efforts and further studies on the ...
Framing time in days instead of years could spur action toward goals
2015-04-28
People starting to plan for retirement or other big goals should pull out a calculator and multiply the years ahead by 365. Measuring time in days instead of months, or months instead of years, can make future events seem closer and thus more urgent, according to new research published in Psychological Science, a journal of the Association for Psychological Science.
When units of time were manipulated to bring important events closer to the forefront psychologically, people reported that they should start to plan and save significantly earlier, even when future events ...
When mediated by superconductivity, light pushes matter million times more
2015-04-28
When a mirror reflects light, it experiences a slight push. This radiation pressure can be increased considerably with the help of a small superconducting island. This was revealed by the joint research done in the Aalto University and the Universities of Jyväskylä and Oulu. The finding paves a way for the studies of mechanical oscillations at the level of a single photon, the quantum of light. The results of the research were published in Nature Communications in April.
In our everyday lives, the effects of the radiation pressure of light can be neglected. ...
Heat makes electrons' spin in magnetic superconductors
2015-04-28
Physicists have shown how heat can be exploited for controlling magnetic properties of matter. The finding helps in the development of more efficient mass memories. The result was published yesterday in Physical Review Letters. The international research group behind the breakthrough included Finnish researchers from the University of Jyväskylä and Aalto University.
The ability to control the huge amount of information within the Internet is largely based on the ability to use the magnetic properties of electrons for reading memory devices. The phenomenon is ...
Embracing the 5G era
2015-04-28
To meet the demands of 2020, the 5G research has attracted global attention and made remarkable progress. 5G will be the first meaningful unified wideband mobile communication system. A recent research has systematically overviewed the latest progress on the 5G research and highlighted the network architecture and several promising techniques which could be employed in the future 5G systems. The research also foresees potential research keypoints and directions.
The related research paper "Key techniques for 5G wireless communications: network architecture, physical layer, ...
Mathematics reveals how fluid flow affects bacteria
2015-04-28
Researchers from the University of Liverpool have used mathematical equations to shed new light on how flowing fluid hinders the movement of bacteria in their search for food.
Many bacteria are mobile and inhabit a variety of dynamic fluid environments: from turbulent oceans to medical devices such as catheters.
Mathematicians from the Universities of Liverpool and Manchester developed a new set of equations to study how flowing fluid affected the movement of bacteria and how the swimming behaviour of the bacteria themselves affected their travel.
Bacteria can ...
Childhood obesity -- 1 epidemic or 2?
2015-04-28
New research has indicated that obesity in children has quite different causes at different ages. The research, led by the University of Exeter Medical School and part of the internationally respected EarlyBird Study, could have far-reaching implications for attempts to reduce the global epidemic of childhood obesity, as it indicates that very different approaches may be needed at various stages of development.
In a study published today (Monday April 27) in the International Journal of Obesity, scientists compared data on contemporary children with those of the 1980's. ...
Quantum particles at play: Game theory elucidates the collective behavior of bosons
2015-04-28
Quantum particles behave in strange ways and are often difficult to study experimentally. Using mathematical methods drawn from game theory, physicists of Ludwig-Maximilias-Universitaet (LMU) in Munich have shown how bosons, which like to enter the same state, can form multiple groups.
When scientists explore the mysterious behavior of quantum particles, they soon reach the limits of present-day experimental research. From there on, progress is only possible with the aid of theoretical ideas. NIM investigator Professor Dr. Erwin Frey and his team at the Dept. of Statistical ...