Immune proteins called HLA molecules help to activate killer T cell responses against pathogens. But according to a study that will be published online on December 14th in the Journal of Experimental Medicine (www.jem.org), one particular group of HLA molecules cripples this activation, perhaps explaining why HIV-infected individuals who express these HLAs progress to AIDS more rapidly than others.
Body
DURHAM, N.C. – As good as laparoscopy is in preventing some of the stresses of open surgery on the body, it does have drawbacks, including reduced blood flow and organ dysfunction. Laparoscopy is a type of surgery in the abdomen done through small incisions.
By adding another gas to the carbon dioxide used to inflate the surgical area during laparoscopy, researchers at Duke University Medical Center have found they can preserve more normal blood flow during noninvasive surgery.
Biologists have identified plant enzymes that may help to engineer plants that take advantage of elevated carbon dioxide to use water more efficiently. The finding could help to engineer crops that take advantage of rising greenhouse gases.
Plants take in the carbon dioxide they need for photosynthesis through microscopic breathing pores in the surface of leaves. But for each molecule of the gas gained, they lose hundreds of water molecules through these same openings. The pores can tighten to save water when CO2 is abundant, but scientists didn't know how that worked until now.
New Haven, Conn.—A team led by Yale University researchers has used nanosensors to measure cancer biomarkers in whole blood for the first time. Their findings, which appear December 13 in the advanced online publication of Nature Nanotechnology, could dramatically simplify the way physicians test for biomarkers of cancer and other diseases.
Scientists have discovered five genetic variants that are associated with the health of the human lung. The research by an international consortium of 96 scientists from 63 centres in Europe and Australia sheds new light on the molecular basis of lung diseases.
LA JOLLA, CA—December 10, 2009—Researchers at The Scripps Research Institute have solved a 10-year-old mystery of how a single protein from an ancient family of enzymes can have two completely distinct roles in the body. In addition to providing guidance for understanding other molecules in the family, the research supplies a theoretical underpinning for the protein's possible use for combating diseases including cancer and macular degeneration.
SAN ANTONIO, TX—A new antibody-drug compound shrank or halted the growth of metastatic breast tumors in almost half of a group of patients whose HER2-positive cancer had become resistant to standard therapies, according to early data from a multicenter Phase 2 clinical trial led by a Dana-Farber Cancer Institute researcher.
The findings will be presented at the 32nd annual CTRC-AACR San Antonio Breast Cancer Symposium on Saturday, Dec. 12 (Abstract 710, Henry B. Gonzalez Convention Center, Exhibit Hall B, 7-9 a.m. CT).
Scientists studying how bacteria under stress collectively weigh and initiate different survival strategies say they have gained new insights into how humans make strategic decisions that affect their health, wealth and the fate of others in society.
COLLEGE STATION – A gene commonly studied by cancer researchers has been linked to the metabolic inflammation that leads to diabetes.
Understanding how the gene works means scientists may be closer to finding ways to prevent or cure diabetes, according to a study by Texas AgriLife Research appearing in the Journal of Biological Chemistry.
Tampa, FL (Dec. 11, 2009) -- Most patients with heart failure likely to benefit from a pacemaker including the capacity for cardiac resynchronization therapy (CRT) do not receive such an implantable device, reports a national study in the December 2009 issue of the American Heart Journal. Less than half who qualify for the device therapy may actually get it, the large-scale study led by University of South Florida cardiologist Anne Curtis, MD, found.
For nearly two decades, Ivy Pike, an associate professor of anthropology at the University of Arizona, has been studying ethnic groups in rural northern Kenya to understand how violence shapes the health of those eking out a living there.
SAN ANTONIO – Black women with hormone receptor (HR)-positive breast cancer had worse disease-free and overall survival, according to data presented at the CTRC-AACR Annual San Antonio Breast Cancer Symposium, held Dec. 9-13, 2009.
"Black women had a higher risk for disease recurrence and inferior survival compared with women of other races," said Joseph A. Sparano, M.D., professor of medicine and women's health at Albert Einstein Medical College of Medicine and associate chairman of the Department of Oncology at Montefiore Medical Center in Bronx, N.Y.
Montreal, December 11, 2009 – Canadian researchers have discovered a novel molecular mechanism that prevents cancer. In the December 11 edition of the prestigious journal Molecular Cell, scientists from the Université de Montréal and the Université de Sherbrooke explain how they found that the SOCS1 molecule prevents the cancer-causing activity of cytokines, hormones that are culprits in cancer-prone chronic inflammation diseases such as Crohns, in smokers and people exposed to asbestos.
How does a cell manage to identify and degrade the diverse types of defective proteins and thus protect the body against serious diseases? The researchers Sabine C. Horn, Professor Thomas Sommer, Professor Udo Heinemann and Dr. Ernst Jarosch of the Max Delbrück Center for Molecular Medicine (MDC) Berlin-Buch, Germany, have now found a crucial piece in this puzzle. In an enzyme complex that plays a critical role in the quality control of proteins, they discovered a scaffold regulating the identification and disposal of various defectively produced proteins.
SAN ANTONIO – Anti-estrogens as therapy for breast cancer may also reduce the risk of death from lung cancer, according to study results presented at the CTRC-AACR San Antonio Breast Cancer Symposium, held here Dec. 9-13, 2009.
"We found a reduction in lung cancer mortality among women treated with anti-estrogens for breast cancer. This work builds on previous studies that had suggested estrogens have a role in lung cancer development and progression," said Elisabetta Rapiti, M.D., M.P.H., medical researcher with the Geneva Cancer Registry, University of Geneva, Switzerland.