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Tag: "continued" at biology news

Study Links Ebola Outbreaks To Animal Carcasses

...where bushmeat is still a source of sustenance and continued monitoring of wildlife in the region. We have identified a 'win ?win' opportunity by using this information to both protect endangered apes from illegal hunting and to protect humans from deadly outbreaks." The paper provides definitive proof for th...

Scientists rid stem cell culture of key animal cells

...mination" from animal pathogens, Xu warns that the continued use of serum replacement and Matrigel means that contamination remains a concern. The ultimate goal, he says, would be to culture stem cells in media completely free of any animal products. ...

U-M scientists find genes that control growth of common skin cancer

...t sustained expression of Gli2 is necessary forthe continued growth of these tumors. When Dlugosz and colleaguesturned Gli2 off, the BCC tumor cells stopped growing and wereeliminated by a programmed cell death process. These results areconsistent with previous work from other labs studying differentHh-associa...

The Shapes Of Life: NIGMS Project Yields More Than 1,000 Protein Structures

...ing protein structures, Norvell said there will be continued development of new technology: “As we reach for higher-hanging fruit ?protein structures that are more complex and harder to solve ?we will need to develop additional tools and methods.?/p> As part of the PSI effort, all the structures determined...

World's largest rainforest drying experiment completes first phase

...f 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 by closing their stomates. The trees adjust to the resulting reduction in photosynthesis by diverting less of the sugar and other carbohydr...

Drug-resistant bacteria on poultry products differ by brand

...gering resistant strains rather than the result of continued drug use, then one has to conclude that fluoroquinolone use in poultry production presents a long-term threat to people." The study was supported by the Johns Hopkins Center for a Livable Future and by the Heinz Family Foundation. E. Johnson, R. Va...

Molecular models advance the fight against malaria

... anti-malarial drugs, Trumpower and his colleagues continued their work on previous studies using yeast enzymes to explore atovaquone resistance. It is not possible to grow enough malaria parasites to isolate and study the respiratory enzyme cytochrome bc1 complex, which the parasites need to live and multiply...

Stem cells from brain transformed to produce insulin at Stanford

...l, proteins normally made by islet cells, and they continued to make some proteins found in neurons. Nonetheles... insulin. After four weeks the cells had survived, continued to produce insulin and had not changed into other cell types or formed tumors. Kim noted that the a...

Birds brains reveal source of songs

...eady learned the correct song had no affect on its continued proficiency. The researchers then learned that the AFP neurons produce random bursts of activity coinciding with new variations in the practice routine. "We think the bursts of these neurons 'kick' the motor pathway that is producing a song, jarrin...

Protein That Promotes Survival Of Stem Cells Might Be Key To Poor Leukemia Prognosis

...in the laboratory. However, BM cells with the gene continued to flourish. In contrast, liver cells were unaffected following loss of Mcl-1, demonstrating that Mcl-1 is important only in certain cell types. Finally, the investigators showed that growth factors (natural proteins that stimulate cells to grow), su...

Youth With HIV Take More Risks After New Meds Introduced

...ky behavior, "these findings indicate the need for continued attention to the issue of sexual risk and the impact of HAART," Lightfoot says. The new study also suggests the lives of some HIV-positive teens have not improved with HAART. Lightfoot and colleagues found that the post-HAART group was in worse heal...

Biologists discover why 10% of Europeans are safe from HIV

...ar after the Great Plague of London in 1665-66 but continued in Sweden, Copenhagen, Russia, Poland and Hungary until 1800. This maintenance of haemorrhagic plague provided continuing selection pressure on the CCR5-delta32 mutation and explains why it occurs today at its highest frequency in Scandinavia and Rus...

First North American Encapsulated Islet Transplant without Long-term Immune Suppression into a Patient with Type 1 Diabetes

...ar after the Great Plague of London in 1665-66 but continued in Sweden, Copenhagen, Russia, Poland and Hungary until 1800. This maintenance of haemorrhagic plague provided continuing selection pressure on the CCR5-delta32 mutation and explains why it occurs today at its highest frequency in Scandinavia and Rus...

Researchers discover underwater volcano

... future cruises," said Staudigel. Within decades, continued growth of Nafanua could bring the summit of this volcano from its current depth of 600 meters to a depth of approximately 200 meters-close enough to the sea surface that it could provide a potential hazard to ocean navigation and coastal communities....

Measuring hormone cuts antibiotic use in half in pneumonia patients

...aid. "Once the treatment is started, it is usually continued for 10 to 14 days, because nobody knows when you can stop without a risk for the patient," he said. Because levels of procalcitonin have been found to be elevated in patients with bacterial infection but not viral infection or other inflammatory dis...

Changing ecosystems throw scientists mega-challenges

...quality and accessibility of water," it says. With continued human population growth and the uncertain impacts of of environmental change, the report states, ensuring an adequate quantity and quality of freshwater for sustaining all forms of like is a growing challenge. " Integrated, multidisciplinary, and mul...

Precise Timing Enabled Pig-to-rat Transplants To Cure Diabetes

...rtilization, the rats rejected the pig tissues and continued to be diabetic," says Hammerman, who is an endocrinologist and director of the Renal Division at Barnes-Jewish Hospital. Hammerman and Rogers are leaders in the emerging field of organogenesis, which focuses on growing organs from stem cells and oth...

15 generations of untrained jocks, couch potatoes show big physiological adaptations

...be expected, the UCSD physiologists found that the continued selection led to significantly greater differences in endurance and oxygen consumption (44%) between the two groups of G15 rats than were seen at G7. "This enhanced divergence at G15 was due in part to an increased skeletal muscle oxygen conductance...

Census of Marine Life explorers surprised by diversity, density of Arctic creatures

...ean system, scientists are eager to understand how continued climate change, if realized, will affect it and the other oceans in turn. For example, the Larsen B ice shelf on the Antarctic Peninsula collapsed in early 2002. Roughly 500 billion tonnes of ice sheet (3,250 square kilometers, about the size of Rho...

NCI Researchers Confirm the Effectiveness of Immunotherapy Approach to Treating Melanoma

...thy that there were three (9 percent) patients who continued to experience complete disappearance of tumors. This result is particularly significant because these patients had not responded to standard treatments or chemotherapies used in treating patients with melanoma. Thirteen patients relapsed after posit...

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