Archive for October 2009
Posted October 30, 2009on:
An interdisciplinary team of researchers has created a new, ultra-sensitive technique to analyze life-sustaining protein molecules. The technique may profoundly change the methodology of biomolecular studies and chart a new path to effective diagnostics and early treatment of complex diseases.Researchers from Boston University and Tufts University near Boston recently demonstrated an infrared spectroscopy technique that can directly identify the “vibrational fingerprints” of extremely small quantities of proteins, the machinery involved in maintaining living organisms.
An article published online on September 1, 2009 in the Journal of Gerontology: Medical Sciences reported the results of a study of men and women aged 65 and older which revealed risk factors associated with dying over a 13 year average period.
Scientists have generated the most comprehensive map of the structural variation that exists among normal, healthy humans, according to a study published online today in Nature. Understanding normal variation between individuals is critical to identifying abnormal changes that may contribute to a wide variety of heritable diseases.
Image: Wikimedia commons
“I think it’s considered to be a landmark paper,” said geneticist Frank Speleman of the Center for Medical Genetics at Ghent University Hospital in Belgium, who was not involved in the work. “It’s quite important in the complete context of genome wide association studies and genetic predisposition.”
Posted October 29, 2009on:
University of Washington (UW) researchers have succeeded in engineering human tissue patches free of some problems that have stymied stem-cell repair for damaged hearts.
The disk-shaped patches can be fabricated in sizes ranging from less than a millimeter to a half-inch in diameter. Until now, engineering tissue for heart repair has been hampered by cells dying at the transplant core, because nutrients and oxygen reached the edges of the patch but not the center. To make matters worse, the scaffolding materials to position the cells often proved to be harmful.
| VIDEO: University of Washington researchers in the Chuck Murry lab at the UW Institute of Stem Cell and Regenerative medicine engineered this heart repair patch from a mix of stem cells….
Heart tissue patches composed only of heart muscle cells couldn’t grow big enough or survive long enough to take hold after they were implanted in rodents, the researchers noted in their article, published last month in the Proceedings of the National Academy of Sciences. The researchers decided to look at the possibility of building new tissue with supply lines for the oxygen and nutrients that living cells require. Read the rest of this entry »
A Swiss research team has found that using an animal’s own brain cells (autologous transplant) to replace degenerated neurons in select brain areas of donor primates with simulated but asymptomatic Parkinson’s disease and previously in a motor cortex lesion model, provides a degree of brain protection and may be useful in repairing brain lesions and restoring function. Read the rest of this entry »
Researchers have shown how an antiviral protein produced by the immune system, dubbed tetherin, tames HIV and other viruses by literally putting them on a leash, to prevent their escape from infected cells. The insights reported in the October 30th issue of the journal Cell, a Cell Press publication, allowed the research team to design a completely artificial protein — one that did not resemble native tetherin in its sequence at all — that could nonetheless put a similar stop to the virus. Read the rest of this entry »
Simvastatin, a commonly used, cholesterol-lowering drug, may prevent Parkinson’s disease from progressing further. Neurological researchers at Rush University Medical Center conducted a study examining the use of the FDA-approved medication in mice with Parkinson’s disease and found that the drug successfully reverses the biochemical, cellular and anatomical changes caused by the disease. Read the rest of this entry »