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Tag: "interaction" at biology news

Study identifies substances in grapefruit juice that interact dangerously with some drugs

...ive ingredients in grapefruit juice that cause the interaction with medications," said Dr. Paul Watkins, the Dr. ...ice behaved like orange juice and did not cause an interaction with felodipine. Watkins notes that there are several implications of this work. "First, it shoul...

Robots manipulating animal behaviour

...tween the artificial and natural agents ?a two-way interaction that is unique and very promising for sciences such as biology and robotics." Not only did the insbots act like and interact with the insects, they even succeeded in changing the roaches' behaviour. For example, the darkness-loving insects followed...

Orange, grapefruit juice for breakfast builds bones in rats

...g that until researchers completely understand the interaction of grapefruit juice and certain medications, a person should ask a doctor. "In general, people should eat a variety of all the colors (in food) to get all of the beneficial compounds," Patil added. "And eat fresh." ...

New strategy developed to combat West Nile Virus

...st Nile Virus appears to be triggered by a complex interaction of mosquitoes, nesting birds and specific weather patterns, scientists say, which leads to "amplification" of the virus within mosquito populations. Researchers from Oregon State University and the University of Florida have identified how those fac...

Stomach receptor for H. pylori discovered

...or the bacteria Helicobacter pylori. Blocking this interaction could lead to new drugs that reduce the risk of pe...jection of bacterial proteins into the cells. This interaction can lead to peptic ulcer disease, gastric adenocarcinoma, and non-Hodgkins lymphoma of the stomach. ...

Study defines effective microbicide design for HIV/AIDS prevention

...a mathematical model that simulates the biological interaction between HIV contained in semen and the protective coating that accumulates on the lining of a woman's vagina after she applies a topical microbicide. The model describes the diffusion of the virus and active ingredients into the tissues, as well as t...

Immune cell communication key to hunting viruses, Jefferson immunologists show

...very strong contribution of non-viral peptide-MHC interaction with a co-receptor," he says. "Such cooperativity we think can be achieved when MHC complexes are close to each other. "We've shown that when we try to mimic the positioning of MHC protein on quantum dots, which we believe is similar to what it ...

MIT creates 3-D scaffold for growing stem cells

...nteraction, cell migrations, tumor and cancer cell interaction with normal cells, cell-based drug testing and other diverse applications. "I believe that in the next 20 years all cell cultures will be in 3D with the designer scaffolds, and most textbooks about cell biology will have to be revised when people o...

Molecular 'on/off switch' controls immune defenses against viruses

... but also turns off those defenses by manipulating interaction of key cellular proteins, UT Southwestern Medical ... LGP2 protein turns off the RIG-I signals. This interaction between RIG-I and LGP2 is vital for properly regulating immunity, but viruses such as hepatitis C ca...

UNC scientists solve mystery of how largest cellular motor protein powers movement

... Dokholyan pointed out that disruption of dynein’s interaction with a particular regulator protein causes defects in nerve cell transmission and mimics the symptoms of people with amyotrophic lateral sclerosis (ALS). ...

Restoring tamoxifen sensitivity in resistant breast cancer cells

...ivision. If the cell is a breast cancer cell, this interaction leads to tumor growth. In women with estrogen receptor-positive cancers, cancer cell growth is strongly influenced by estrogen. Tamoxifen works by binding to estrogen receptors in place of estrogen and blocking the signals that lead to cell divisio...

Spike in testicular cancer is focus

... will try to assess the potential gene environment interaction on the manifestations of the disease.? ...

Changing length of days reverses how estrogen affects aggressiveness in mice

...r said. "We wanted to find out more about how this interaction takes place in mice." In one study, they looked at how day length interacted with two types of receptors in parts of the brain that affect aggression ?estrogen receptor alpha and estrogen receptor beta. These receptors are like docking stations th...

Three-dimensional, miniature endoscope opens new diagnostic possibilities

...ich calculates structural information based on the interaction between two waves of light, provides the data required to create three-dimensional images. To demonstrate the device's application in a live animal, the researchers used the system to image metastatic ovarian tumors on the abdominal wall of a mou...

Study: Living coral reefs provide better protection from tsunami waves

...he overarching element was the wave itself and its interaction with all these obstacles. Eventually, Kunkel found a set of equations that provided a limited but comprehensive picture of a tsunami strike. "We had to idealize a number of factors, because we wanted to create a model that could be used for a gene...

Therapeutic role found for carbon monoxide

...ated co-cultures. "We concluded that the physical interaction between the two cell types plus the ability to generate NO was crucial for the positive CO effects," he says, adding that studies are now underway to determine the mechanism by which CO exposure leads to the increase in NO generation. "Our hope is t...

Researchers find docking sites for glucocorticoid receptor and Hsp90

...t in some as-yet-undetermined way to inhibit Hsp90 interaction with client proteins. __IMAGE_2 Tapping into that knowledge, scientists may be able to develop synthetic molecules that would control specific Hsp90 activity, such as directing the response of cells to glucocorticoids, said the study's principa...

Bitter taste identifies poisons in foods

...taste perception of vegetables is influenced by an interaction between variants of taste genes and the presence of naturally-occurring toxins in a given vegetable. The study appears in the September 19 issue of Current Biology. Scientists have long assumed that bitter taste evolved as a defense mechanism to det...

Innovative movies show real-time immune-cell activity within tumors

...ly uneven. Greater insights into the mechanisms of interaction between T cells and tumor cells could provide vital new information to advance these efforts. "Through adoptive transfer," Weninger explains, "we were able to compare two situations, one in which the T cells recognize something on the tumor and one...

Pleasure and pain: Study shows brain's 'pleasure chemical' is involved in response to pain too

... basal ganglia may represent an important point of interaction between the neurobiologies of emotion, reward and pain regulation. The new findings build on previous pain research by Zubieta and his team, which has shown individual variation in the rating of pain, and has visualized the brain's own painkille...

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