Body

CAMBRIDGE, Mass.--MIT and Boston University engineers have designed cells that can count and "remember" cellular events, using simple circuits in which a series of genes are activated in a specific order.

Such circuits, which mimic those found on computer chips, could be used to count the number of times a cell divides, or to study a sequence of developmental stages. They could also serve as biosensors that count exposures to different toxins.

BOSTON (05-28-09) -- Biomedical engineers at Boston University have taught bacteria how to count. Professor James J. Collins and colleagues have wired a new sequence of genes that allow the microbes to count discrete events, opening the door for a host of potential applications, which could include drug delivery and sensing environmental hazards.

Researchers at the University of California, San Francisco, and collaborators at Harvard Medical School have linked a specialized protein in human muscles to the process that clears glucose out of the bloodstream, shedding light on what goes wrong in type 2 diabetes on a cellular level.

Establishing the function of this protein, which significantly is not present in mice, has broad implications for both the future study and possible therapies for diabetes, according to an article published in the May 29, 2009 issue of the journal "Science."

A new combination therapy of daily consensus interferon (CIFN) and ribavirin is effective for some people with chronic hepatitis C (HCV) who do not respond to standard therapy. The treatment works particularly well in interferon-sensitive patients who have lower fibrosis scores, according to a new study in the June issue of Hepatology, a journal published by John Wiley & Sons on behalf of the American Association for the Study of Liver Diseases (AASLD).

Two new studies address donor factors that could affect outcomes for liver transplant recipients, particularly those with chronic hepatitis C (HCV). One found that donor steatosis, or fat in the liver, does not affect liver disease progression or three-year survival in recipients with or without HCV. However, transplants from people higher on the Donor Risk Index did adversely affect the outcomes of HCV-positive recipients more than recipients without HCV.

These studies are in the June issue of Liver Transplantation, a journal published by John Wiley & Sons.

Wagga Wagga, Australia - May 28, 2009 – A new study appearing in Congestive Heart Failure has found that the presence of anemia in patients with chronic heart failure is associated with a significantly increased risk of death. The findings also show that anemia is associated with a poorer degree of left ventricular function and a lower left ventricular ejection fraction, an objective measure of cardiac function.

CLEVELAND— Here's one more reason to keep your teeth healthy.

People, who suffer from gum disease and also have a severe form of rheumatoid arthritis, reduced their arthritic pain, number of swollen joints and the degree of morning stiffness when they cured their dental problems. Researchers from the Case Western Reserve University School of Dental Medicine and University Hospitals of Cleveland reported on this new intervention for arthritis in the Journal of Periodontology.

Researchers from the Ludwig Institute for Cancer Research at the University of California, San Diego School of Medicine have uncovered a remarkable property of the contractile ring, a structure required for cell division. Understanding how the contractile ring works to divide the cell may facilitate development of therapies to prevent uncontrolled cell division in cancer.

Settling the growing debate over ownership of Arctic Ocean resources is complicated by the fact that the various countries involved have different understandings of the geography of the place.

Phil Steinberg, an associate professor in the Department of Geography at Florida State University in Tallahassee, says coming to terms with those divergent views is the first necessary step to resolving what is becoming a prickly international issue as global warming opens up more of the Arctic Ocean.

Mice carrying a "humanized version" of a gene believed to influence speech and language may not actually talk, but they nonetheless do have a lot to say about our evolutionary past, according to a report in the May 29th issue of the journal Cell, a Cell Press publication.

Two studies in the May 29th issue of Cell, a Cell Press publication, have taken advantage of new technological advances to search for and find previously unknown weaknesses in a hard to treat form of cancer. The discoveries lend new hope in the fight again tumors that are today considered "undruggable."

BOSTON, Mass. (May 28, 2009) — Corrupt lifestyles and vices go hand in hand; each feeds the other. But even the worst miscreant needs customary societal amenities to get by. It's the same with cancer cells. While they rely on vices in the form of genetic mutations to wreak havoc, they must sustain their activity, and that requires equal parts vice and virtue.

Howard Hughes Medical Institute researchers have identified many potential new drug targets for cancers long deemed "untouchable" due to the type of genetic mutation they contain. These studies are beginning to reveal new ways of attacking cancer by targeting a largely hidden network of normal genes that cancer cells rely on for survival.

(May 28, 2009) - As the best drugs become increasingly resistant to superbugs, McMaster University researchers have discovered a completely different way of looking for a new antibiotic.

ORLANDO, Fla.--A new blood test used in combination with a conventional prostate-specific antigen (PSA) screening sharply increases the accuracy of prostate cancer diagnosis, and could eliminate tens of thousands of unneeded, painful, and costly prostate biopsies annually, according to a study led by researchers at Dana-Farber Cancer Institute.