Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert
...ns science team. The rover followed a transect and stopped occasionally to perform detailed surface inspection, effectively creating a "macroscopic quilt" of geologic and biological data in selected 10 by 10 centimeter panels. After the rover departed a region, the ground truth science team collected samples...High cholesterol levels accelerate growth of prostate cancer
...way was inhibited, apoptosis increased, and tumors stopped proliferating. Replenishing cell membranes with cholesterol reversed this inhibitory effect. "Our study opens up a new paradigm in thinking about how cancer might be controlled pharmacologically by manipulating cholesterol," says Freeman. "Our da...JCI table of contents April 1, 2005
...erfusion, occurring when blood flow is temporarily stopped and, upon restoration, leads to massive inflammation and death of liver cells. Studies have shown that a protein called NF kappa B plays a role in this type of injury, but its precise function is unclear. In a study appearing online on March 17, in ...World's largest rainforest drying experiment completes first phase
...rees, measuring 4 to 10 inches in diameter, simply stopped growing during the end of the dry season of 2000, following the first period of rainfall exclusion, as the trees of similar size continued to grow in the "control" forest plot. The trees slow down the amount of water that they lose from their leaves...Deficiency of growth hormone and IGF-1 reduces cancer and kidney disease, but creates other problems
...f age rat adolescence. Then hormone treatment was stopped and the animals had lower growth hormone and IGF-1 levels the rest of their lives. That had an effect on cancer: 88 percent of "normal" male rats have tumors at death. The male rats that had a lifelong deficiency of growth hormone had substantially ...Urine helps infectious yeast stick
...uld only happen if Sir3 and the other proteins had stopped covering them up for some reason. No drug resistance developed in blood, but Domergue did detect it in a mouse model of bladder infection that had been developed by collaborator David Johnson of the University of Maryland School of Medicine. Turning...Immune cells in the liver take a ride
...in, the cells behaved like athletes. They abruptly stopped and remained still, signaling that they had found the antigen and were ready to undertake their next task of alerting the immune system. And there was yet another surprise. Drs. Littman and Dustin had expected that replacing the CXCR6 gene woul...Understanding natural killers could lead to new hepatitis treatments
...The researchers observed that the roving NKT cells stopped their movement when alerted by a foreign protein, called an antigen, "We think this is a reflection of their normal function of searching for antigen," said Littman. "Whenever there is detection of antigen reflecting some kind of damage or local infe...Elephant seal pups suffer from ocean warming
... After 1999, however, the declining trend abruptly stopped and the weaning weight of the pups increased to eventually reach 130 kg. This change coincided with the cooling of the ocean at the beginning of the new century. "Despite ranging widely and foraging deeply in cold waters beyond coastal thermoclines i...Buying time through 'hibernation on demand'
...o death. Before she was resuscitated her heart had stopped beating for two hours and her temperature had plun...e hydrogen sulfide and room-air cocktail, the mice stopped moving and appeared to lose consciousness, their respiration dropped from the normal 120 breaths per...Viral protein influences key cell-signaling pathway
...el with an HTLV-1 that lacked the p12 gene, and it stopped the virus from replicating almost entirely. "That told us this gene was important," he says. Subsequent research led by Lairmore showed that the p12 protein travels to the network of membranes within the cell known as the rough endoplasmic reticulu...Unexpected lock and key mechanism found for the assembly of tumor blood vessels
...anoma and lung cancer. Inhibitors of the integrin stopped new blood vessel growth and suppressed tumor growth, indicating that the integrin helped in the creation of tumors "Our study marks the first time this integrin was found to play a key role in angiogenesis," said Varner. "This integrin is known to r...Gene variants predict bleeding after heart surgery
...o keep blood pumping while surgeons operate on the stopped heart. "However, these risk factors we use now are poorly predictive of which patients are more likely to bleed," Welsby continued. "Also, these factors are only partially successful in accounting for the striking variability in outcomes among patien......cells through the administration of TET. When they stopped the TET, the "switch" turned on, triggering ferritin molecules to increase their numbers, thereby causing an increase in iron uptake within the tumor cells. The contrast between the iron content in these and in the normal surrounding cells showed up ...Hopeful results from interrupted Alzheimer's vaccine study
...s up in Alzheimer's-affected brains. The study was stopped early in 2002 after a few participants developed b...ll effects -- and then the Phase II trial that was stopped early. "With the full agreement of both sponsors, Elan and Wyeth, we halted the study as soon as we...Logging changed ecological balance for monkeys, damaged health
...Twenty-eight years after intense selective logging stopped in the region now known as Uganda's Kibale National Park, the red-tailed guenon (Cercophithecus ascanius) is a primate still in decline. The logging practice, scientists report in a new study, changed the ecological balance for these monkeys, leading...Scientists report tissue engineering success
...ble progress in the past decade, but advances have stopped short of clinical application for most tissues. For elderly patients tissue-engineered arteries could provide grafts for bypass surgery. However, generating robust vessels using cells from elderly donors with vascular disease is difficult. One obstac...UQ leads $10m study to fight dengue
...f the life-threatening dengue fever virus could be stopped in its tracks if University of Queensland scientists successfully complete a new $10 million (AUD) research project. The work is funded by the Bill and Melinda Gates Foundation "Grand Challenges in Global Health" (GCGH) initiative. The UQ research ...Cut global warming by becoming vegetarian
...uld be controlled if we all became vegetarians and stopped eating meat. That's the view of British physicist Alan Calverd, who thinks that giving up pork chops, lamb cutlets and chicken burgers would do more for the environment than burning less oil and gas. Writing in this month's Physics World, Calvert ca......mice. The double-loaded nanocell shrank the tumor, stopped angiogenesis and avoided systemic toxicity much better than other treatment and delivery variations. But it is patient survival and quality of life that really inspire this research, Sasisekharan said. Eighty percent of the nanocell mice survived be...