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Tag: "culture" at biology news

Brittlestar provides new model for stem cell research

...tudy the cells in the living organism, not just in culture in the lab." The researchers are particularly interested in studying the recovery of the nervous system which could have possible applications in the future for understanding and treating neurodegenerative diseases. Using the brittlestar as a model...

New method for identifying microbes

...to identify species is slow and error prone as the culture conditions often screen out important members of the community. Sequencing entire genomes, while highly specific and informative, would be too labor intensive and costly. So scientists have been searching for ways to identify key segments of genetic ...

Study fishes out new role for prostaglandins

...hat…if you just put some prostaglandin back in the culture medium, you rescue the phenotype." In another set of embryos, the researchers blocked prostaglandin receptors, EP2 and EP4. Blocking the EP4 receptor caused defects similar to those associated with blocking PGE2 synthesis. When the researchers anal...

Wisconsin scientists grow two new stem cell lines in animal cell-free culture

...ison, have developed a precisely defined stem cell culture system free of animal cells and used it to derived...oser to clinical reality by completely ridding the culture medium in which they are grown of animal products that could harbor viruses or other deleterious age...

APS lecturer shows rare video of 'teacher-student' immune cell interactions in live animal

...own about some aspects of this process from tissue culture studies, but this has never been observed before in vivo. That has largely been a black box," he said. His group has explored the first days after a T cell encounters the one antigen it will learn to recognize, von Andrian said. During this time int...

Technique speeds up detecting, treating wound bacteria

...l in detecting flora that can't easily be grown in culture because no one's been able to determine just what the bacteria like in the way of nutrients and environmental conditions. The earlier the lab staff has answers, the earlier the correct treatment can begin. Initial treatment is necessarily empiric. ...

Chimpanzees can transmit cultural behavior to multiple 'generations'

...ted generations equaling approximately 90 years of culture in the wild. A comparative benchmark study with three-year-old human children, conducted by St. Andrews researcher Emma Flynn, PhD, revealed similar results, providing further evidence chimpanzees, like humans, are creatures of culture. In the stud...

Neuronal cell cultures kept on the straight and narrow

...ST researchers detail a microfluidics technique to culture neuronal cells in relative isolation on a variety of cell-culture surfaces, and to pattern the cells on the surface to study the effects of geometry on cell development. The trick is to mask the substrate with multiple alternating layers of positivel...

First human study confirms that immune cells can be a primary cause of bone loss in gum disease

...ne destructive cells (osteoclasts) in a laboratory culture system, in spite of the elevated presence of B and T lymphocytes. Since it has never been reported that any bacteria per se invade and resorb bone independent of osteoclast activation, RANKL expression by T cells and B cells proves to be one of the m...

With few factors, adult cells take on character of embryonic stem cells

..., they added, and the process may require specific culture environments. It also remains unclear whether iPS cells can do everything that embryonic stem cells can. ...

DOE JGI finishes 100th microbial genome

...crobiology. Especially where, through conventional culture methods, we are unable to shed light on the metabolic profiles of these microorganisms and their environmental implications, DNA sequencing provides us a welcome set of tools." "The power of DOE JGI sequencing microbes, and other organisms, is that ...

Nutrition a major factor in rise in twin pregnancies

...t the increase we've seen coincides with improving culture conditions and that it started before any manipula...o be a natural adaptation to improved nutrition or culture conditions, it could prove difficult to reverse as embryo quality continues to improve ?whether in t...

How IVF could be causing genetic errors in embryos

...imprinting in mouse embryos had shown that certain culture media and concentrations of oxygen altered the exp...rnia, San Francisco, USA, said: "We found that the culture of mouse embryos in the laboratory is sufficient to alter the expression of several imprinted genes ...

Neurons grown from embryonic stem cells restore function in paralyzed rats

...tion, they added three nerve growth factors to the culture medium. Most of the cells were also cultured with a substance called dibutyrl cAMP (dbcAMP) that helps to overcome axon-inhibiting signals from myelin, the substance that insulates nerve fibers in the spinal cord. The cells were transplanted into ...

Fish virus in Northeast spreading to other fish species

...ure." The researchers are using a classical cell culture technique to perform the initial stage of the diagnostic testing. This technique can take two to four weeks to yield results. Cornell researchers are developing a molecular-based test for VHSV based on a specific gene sequence in the virus. Once ava...

HIV infection requires an accomplice: B cells with special protein direct HIV to T cells

...ce activated, the DC-SIGN B cells were placed in a culture with T cells and a small amount of virus. Within 24 hours, HIV had begun invading the T cells, yet the B cells were spared. Although they did not become infected, B cells nonetheless harbored virus that was transmissible to T cells for up to two days...

T cells activated to fight HIV basis for dendritic cell therapeutic vaccine

...nto mature dendritic cells, and they were grown in culture with the addition of various substances to boost t...igen still present, these CD4 cells were placed in culture with the beefed up dendritic cells. Recognizing the cells as foreign, the dendritic cells processed ...

Experimental RNA-based drug kills prostate cancer cells effectively and safely

...r cell. The researchers first tested the drug in culture dishes containing cancer cells. They found that the drug effectively bound to prostate cancer cells, entered them and shut off production of the target protein, PLK1. The researchers then moved into mouse experiments. They injected the drug directl...

With few factors, adult cells take on character of embryonic stem cells

..., they added, and the process may require specific culture environments. It also remains unclear whether iPS cells can do everything that embryonic stem cells can. ...

Wild meerkats school their young

...lution and for us to examine the relations between culture in our own species and cultural behaviour in other animals." Like any good teacher, the helpers would also monitor the pup after they had provided it with food. If the pup was reluctant to handle the prey, the older meerkat would nudge the item to...

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