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Tag: "interacting" at biology news

Interaction between lymph and liver cells may affect immune response

...n that naïve T lymphocytes are capable of directly interacting with hepatocytes contradicts the dogma that naïve T cells cannot gain access to peripheral non-lymphoid tissues," the authors state, adding that the study furthers the notion that liver cells may be involved in hepatic immune tolerance. "Like any goo...

With fruit fly sex, researchers find mind-body connection

...ehavior. Other scientists have found that a web of interacting genes control courtship and receptivity. McKeown wanted to settle the debate. McKeown suspected that multiple genes shape behavior and that doublesex played a role. But experimenting with doublesex is difficult. When both copies of the gene are re...

Nanoparticle assembly enters the fast lane

...partially rigid, double-stranded DNA, which forces interacting linker segments of DNA to extend away from the gold surface, allowing for more efficient assembly. "By using properties of DNA, we can increase assembly kinetics, or speed, by relatively simple means without a lot of synthetic steps," Maye said....

Caterpillars tell us how bacteria cause disease

... leading the study, explained: "Bacteria have been interacting with simple animals such as amoeba and insects for a staggering length of evolutionary time. It seems likely that most virulence genes around today probably first evolved to work against these hosts". With funding from the Biotechnology and Biolog...

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

... the tissue. This, we found, was because they were interacting directly with the tumor cells in place. In several instances, we were actually able to see the tumor cells dying ?the first time that has ever been observed in real-time in living animals. Then, once the tumor cells had been destroyed, we saw a drama...

Otherworldly bacteria discovered two miles down

...ct that because the chemical signature arises from interacting with the fracture's wall rock," commented Rumble. "It is possible that communities like this can sustain themselves indefinitely, given enough input from geological processes. Time will tell how many more we might find in Earth's crust, but it is esp...

Complexity constrains evolution of human brain genes

...within the brain. "We know that proteins with more interacting partners evolve more slowly," Wu said. "Mutations that disrupt existing interactions aren't tolerated." Although the gene sequences from human and chimpanzee remain very similar, previous studies in tissues other than the brain have shown that gen...

Plants' role in global warming re-examined

...s upon having a thorough understanding of multiple interacting factors, including plant respiration. "The fact is that plants adapt to higher temperatures and their levels of respiration adjust downward." While some previous climate-carbon simulations have included differentiation among vegetation types, none ...

Inheriting a tendency to brain infection

... are complex, involving different genetic variants interacting with each other and with the environment in subtle ways that add up to an overall predisposition or resistance. However, Michael Levin, professor of pediatrics and international child health at Imperial College, London, does not think the two the...

Mouse study reveals new clues about virulence of 1918 influenza virus

...mbination of all eight of the 1918 flu virus genes interacting synergistically that accounts for the exceptional virulence of this virus. Michael G. Katze, Ph.D., of the University of Washington School of Medicine, Seattle, a grantee of the National Institute of Allergy and Infectious Diseases (NIAID), one of ...

Robots manipulating animal behaviour

... competitiveness and a decrease in costs. "A robot interacting with animals, even if it is not mobile, could be used for numerous tasks, such as herding or milking. Our project demonstrates that the fields of biology and IT can work together more closely in future." Though the project has officially ended, some...

Large-scale genomics project will hunt genes behind common childhood diseases

... thought to involve the contributions of multiple, interacting genes. The Center's researchers will then work to translate the genetic knowledge into precisely targeted treatments for the diseases in question, customizing treatments to a child's genetic profile. "We are following a trail blazed by the Human Gen...

Birds going extinct faster due to human activities

...l in the body, acquire their identities in part by interacting with their surroundings - even when they are outside of the body in a laboratory dish, University of Florida scientists report. Using an animal model of embryonic stem cell development, researchers with UF's McKnight Brain Institute have begun to a...

Medium is the message for stem cells in search of identities

...l in the body, acquire their identities in part by interacting with their surroundings - even when they are outside of the body in a laboratory dish, University of Florida scientists report. Using an animal model of embryonic stem cell development, researchers with UF's McKnight Brain Institute have begun to a...

Variations in detoxifying genes linked to Lou Gehrig's disease

...c ALS is modulated by variations in multiple genes interacting with each other and environmental exposures. The genes for human paraoxanases (PON 1, PON 2 and PON 3), which are located on chromosome 7q21.3, code for the production of detoxifying enzymes involved in the metabolism of a variety of drugs, organop...

Report focuses on the role good microbes play in future medicine

...ase through a number of mechanisms. One way is by interacting directly with the disease-causing microbes, making... disease. Probiotics also help prevent disease by interacting with and strengthening the immune system. "Exposure to commensal organisms is necessary for the a...

Compound in dairy products targets diabetes

...tors of the receptors by getting into the cell and interacting with the PPARs to regulate glucose and fat metabolism," says Vanden Heuvel. Early human trials indicate that when administered for longer than 8 weeks, CLA improves the body's misregulation of insulin and lowers the level of glucose in the blood ...

Meth promotes spread of virus in HIV-infected users

...swer. "Since meth mediates its effects through interacting with dopamine receptors present on the cells, and meth increases DC-SIGN, which are the HIV attachment receptors, use of dopamine receptor blockers during HIV infection in meth users could be beneficial therapeutically to reduce HIV infection in the...

New bird flu drug promises to beat the problem of resistance

... much tighter to the neuraminidase. Rather than interacting with the molecules on the surface of the infected cell, the neuraminidase enzyme binds to the drug instead. The drug physically gets in the way and inhibits the action of the enzyme. This stops the virus from spreading to new cells and helps to red...

Defense peptide found in primates may block some human HIV transmissions

... is unclear, but it may be a result of retrocyclin interacting with more than one target on both the cell and virus. Viruses that have to defeat more than one antiviral mechanism often develop resistance at a much slower pace. The next phase of Cole's research will delve more into the mutations that HIV-1 can ...

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