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Tag: "changes" at biology news

St. Jude study solves mystery of mammalian ears

...if altering the position of the cilia in the fluid changes the ability of the cilia to amplify sound, then hearing should be affected when the mutant prestin made the cell extend itself. Therefore, the team developed a line of genetically modified mice that carried only mutant prestin in their outer hair cel...

Researchers discover inherited mutation for leukemia

... geneticists have come to believe that such subtle changes are common causes of cancer, and this is one of the first, strong examples of that principle." The study succeeded because it combined the field of gene mutation research and the new field of epigenetics, which identifies genes silenced by faulty...

Releasing fish for the future

...cols designed to maximise fish survival via subtle changes to management practices. Owing to bag limits, legal sizes and non-consumptive angling, between 30 and 50% of the total recreational catch is released each year in Australia. This amounts to more than 47 million fish being caught and released annua...

Cigarette smoke alters DNA in sperm, genetic damage could pass to offspring

...s have demonstrated in mice that smoking can cause changes in the DNA sequence of sperm cells, alterations th...inherited, these mutations persist as irreversible changes in the genetic composition of off-spring.” said Carole Yauk, Ph.D., lead author of the study and res...

Simulations unravel outer membrane transport mechanism

...ehow draws the luminal domain out of the barrel or changes its conformation to make way for the large molecul...l motions of atoms that guide large conformational changes happen on a very short time scale: femtoseconds,” Tajkhorshid said. Each step relies on the completi...

CSIRO scientists join fight to save 'Tassie devil'

...’s hair to determine if any chemical or structural changes can be detected that can be correlated with the disease. “We are hoping we can work together to develop a pre-clinical diagnostic test based on recent developments in the diagnosis of human breast cancer,” Dr Church said. “Such a test would enab...

Hormone helps mice 'hibernate,' survive starvation

..., all geared to promote survival. “This hormone changes the metabolism and behavior of mice in the face of inadequate nutrition,” said Dr. Steven Kliewer, professor of molecular biology and pharmacology at UT Southwestern and the study’s senior author. “We hope to manipulate this hormone-receptor signalin...

Largest synthetic gene ever built offers insights into anti-malarial drug resistance

...site when it is growing inside the red cell. These changes affect how drugs like chloroquine enter the parasite, and how efficiently they bind to pre-crystalline heme. If these drugs can't enter blood cells as efficiently, and if the efficiency of heme binding is pushed in the wrong direction, they can't pre...

Study shows big power of small RNAs, not just proteins, in halting cancer

...sions, CSHL researchers found a connection between changes in the p53 pathway and the loss of a specific family of miRNAs, known as miR-34. The fact that p53 uses miRNAs to stop tumor cell growth reveals a completely new dimension of this critical cancer fighting pathway and its ability to trigger the gene...

Columbine flowers develop long nectar spurs in response to pollinators

...anismal systems. "In the case of these flowers, changes appear to happen relatively rapidly in response to changes in pollinators," said Zamer....

Ancient DNA traces the woolly mammoth's disappearance

...tists tended to think that the major environmental changes happened about fifteen to twenty-five thousand years ago, when the glaciers reached their fullest extent. The findings also offered early human hunters a potential alibi; they didn’t come on the scene in large numbers until even later. In search o...

Salty oceans provide early warning for climate change

...ation. Models and data both indicate that these changes in ocean circulation occur over very short time-sc...t could act as an early warning system for climate changes 10-20 years down the road,” he says....

Undergraduate research shows leaderless honeybee organizing

...bees perform their jobs more actively, perhaps) or changes bees response to other signals. Pierce and Sch...e egg layer whose own behavior is programmed, with changes dictated by signals delivered by older workers. This does not mean, however, that the colony is c...

Study shows lizard moms dress their children for success

...example in which exposure to the mother's hormones changes such a fundamental aspect of appearance. Even more exciting is that the mother has different patterns at her disposal, so she can ensure a good match between back patterns and other traits that her offspring possess," said Lesley Lancaster, a UCSC gr...

Marine phytoplankton changes form to protect itself from different predators

...gy at the Georgia Institute of Technology. “These changes in form made nearly a 100-fold difference in the a...rence could be dramatic. “When one of these cells changes to the biggest colony form, although it takes a while, it’s like changing from a mosquito to 76 blue...

Researchers demonstrate way to control tree height

..., in fact, just about any height in between. Other changes can also affect foliage shapes or color in very attractive ways, and some might have value in cleaning up environmental pollution. In their studies, OSU scientists were able to create young poplar trees, which grow rapidly and can reach a mature h...

Researchers discover 'acquired' DNA key to certain bacterial infection

... a cause of syndromes may be decreasing because of changes in treatment for HIV-infected patients, according to the Centers for Disease Control and Prevention, which estimates that 1 out of 100,000 persons may be affected. However, CDC also notes that the bacterium’s resistance to antibiotics – already a pro...

Prey not hard-wired to fear predators

...vegetation used by these migrants. “It is not just changes in climate or disease may alter our big remote wild landscapes, but so do the actions of conservationists and public agencies by restoring ecosystems to bring native carnivores back to where they once thrived.” said Dr. Berger. Berger’s study, wh...

Turn-ons and turn-offs for neurons

...by mechanisms involving gene accessibility without changes in DNA sequences, a process called epigenetics ("above and beyond the gene”). Switching gene expression “on” and “off” is of utmost importance when studying gene function in the adult nervous system. In the early 1990s, scientists described a tetr...

Gene therapy study shows safety and statistically significant improvement in Parkinson's disease

...ical improvement also correlated well to metabolic changes in glucose utilization as measured by PET scan. The PET scan data revealed a significant improvement (p<0.001) in brain metabolism on the treated side of the brain compared to the untreated side. No adverse events related to the gene therapy proc...

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