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Tag: "chickens" at biology news

Computers to be used to find blueprint for new influenza drug

...g that an influenza outbreak developing from Asian chickens could kill thousands of people. Professor Ian Wil...g another flu outbreak, this time originating from chickens in Asia. “If we are successful, we will have taken important steps in finding a new way of fighting...

Mother birds increase progesterone to hatch females

...tally manipulated levels of progesterone in female chickens during the first meiosis. They injected either a low dose or a high dose of progesterone (dissolved in sesame oil) or a control dose of pure sesame oil. The low dose of progesterone produced 61 percent males, which was very close to the control grou...

First production of human monoclonal antibodies in chicken eggs published in Nature Biotechnology

...c proteins with enhanced properties in the eggs of chickens as an alternative to established mammalian cell culture systems," said Robert J. Etches, Ph.D., D. Sc., Origen Therapeutics vice president, research. "Antibodies produced by this method had very similar physical and biological characteristics to thos...

What comes first…the chicken, the egg, or the bad attitude?

... at the University of Alberta have discovered that chickens raised for meat can choose whether or not they'll ...ilemma. "Some of the broiler breeders (parents of chickens raised for meat) are happy to shift their nutrients from the growth of their bodies to egg productio...

Drug resistant avian influenza viruses more common in Southeast Asia than North America

...anges, the researchers said. For example, treating chickens with amantadine to prevent infection with H5N1 would put selective pressure on the M2 gene to acquire mutations that made it resistant to this antiviral drug. "H5N1 is now endemic-a permanent- resident- in Southeast Asia, including China," Webster s...

Agricultural workers at increased risk for infection with animal flu viruses

...rus "mixing bowl," especially on farms where pigs, chickens and people coexist--is a potential public health concern, the study authors assert. The paper appears online this week in Clinical Infectious Diseases. "Pigs play a role in transmitting influenza virus to humans," says NIAID Director Anthony S. Fau...

Researcher uncovers details of how cancer spreads

...n found in humans, it does lead to tumor growth in chickens and created cancerous cells in the cultured system. In the study, the researchers found that v-Src attaches to an enzyme, called focal adhesion kinase, inside the cell. This association jump-starts a series of cascading interactions between proteins ...

Brazilians sequence genes of pig and poultry killers

...lated bacterium that causes respiratory disease in chickens and turkeys. The researchers also identified the genetic sequence of a non-pathogenic strain of Mycoplasma hyopneumoniae in order to compare it to the pathogenic strain and determine which genes and proteins help the bacterium kill pigs. Edmundo Gr...

USC researchers track down the stem cells that create feathers

...ls within a chicken-feather follicle by giving the chickens water containing a non-radioactive label that was then incorporated and retained only in the putative epithelial stem cells. They showed that these cells were pluripotent-retaining the ability to differentiate into many different cell types-by taking...

Contagious obesity? Identifying the human adenoviruses that may make us fat

...on Biomedical Research Center at LSU, noticed that chickens in India infected with the avian adenovirus SMAM-1...h more visceral fat and body fat compared with the chickens infected with Ad-2, Ad-31 or the control group, even though they didn't eat any more. The Ad-37 grou...

Birds that make teeth

...the capacity to form teeth still resides in normal chickens and can be triggered experimentally by molecular signals. Taken together, the new findings indicate that even though modern birds lost teeth millions of years ago, the potential to form them persists. ...

Forsyth scientists gain greater understanding of how embryos differentiate left from right

...h the study of three different vertebrates (frogs, chickens and zebrafish), marks the first time that a single common mechanism has been identified in left-right patterning in three distinct species. Such a discovery may have far-reaching implications for the understanding of craniofacial development, right-...

Salk researchers make fast strides towards understanding how our body controls walking

... input from the brain, which explains why headless chickens run away from the butcher's block. "Although people have known about the CPG for a long time, they haven't been able to identify the nerve cells that are part of these circuits. Even at closer inspection, the spinal cord is just a jumbled mass of h...

UF scientists restore sight to chickens with blinding disease

...a disease that falls in the LCA family. "Enabling chickens that can't see to peck and eat after treatment is ... to light. In comparison, tests on three untreated chickens showed no meaningful responses. "This is an interesting gene-transfer technique that appears to res...

Origen publishes in Nature a robust and versatile method for creating transgenic chickens

...and versatile technology for genetically modifying chickens that, for the first time, puts avian transgenics o...w technology opens up the possibility of producing chickens with enhanced agronomic traits, including resistance to avian flu. "This research breakthrough came...

Control measures fail to stop spread of new H5N1 virus

...ers found the virus in samples taken from infected chickens in 11 of the last 12 months of the present study, compared with only four months during 2004-05. This indicates an increase in the incidence of H5N1 infection in 2005-2006 compared with previous years, which suggests that H5N1 viruses have not been e...

'Killer' B cells demonstrate evolutionary link between fish and mammal immune systems

... themselves, for example, were first discovered in chickens in the 1960s. According to Sunyer, the Penn findings are not only important for understanding the evolution and function of immune cells in fish but also may point out to novel roles of B cells in mammals. "At this point, we cannot rule out the po...

Scientists find mutations that let bird flu adapt to humans

... cell receptors. By contrast, the viruses found in chickens and ducks could only recognize the receptors on avian cells. The work helps flesh out the changes that have occurred in the worrisome strain of avian influenza virus known as H5N1, a strain some fear could be the organism that will trigger a pande...

'Protecting virus' offers instant flu protection and converts flu infections into their own vaccines

...or domestic animals. Ducks get a gut infection and chickens a combined gut and respiratory infection, so it may be possible to simply deliver the protecting virus to them in their drinking water. One dose should protect a chicken for weeks. Flu is a major problem in the horse racing industry and in domestic...

Bird sex is something else

... their dosage compensation study. The team sampled chickens and zebra finches, and compared the results with data from humans and mice. In several types of finch and embryonic chicken brain tissue, Z chromosome genes were expressed up to 40% higher in ZZ males than ZW females. This contrasts with findings fro...

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