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Tag: "cultures" at biology news

Yellowstone microbes fueled by hydrogen, according to U. of Colorado study

...traditional techniques of microbiology thatutilize cultures grown in the lab, the CU-Boulder team used methodologydeveloped by Pace to genetically analyze the composition of themicrobial community as it appeared in the field. "We didn't look atwhat grows in a culture dish, we looked at the RNA of samples dire...

Lack of enzyme turns fat cells into fat burners

... studied the oxidation of fatty acid andglucose in cultures of fat cells isolated from both normal and mutantmice that lacked ACC2. When the mice were fed a normal diet, fatty acidoxidation was 80 percent higher in the fat cells of the mice lackingACC2 when compared to normal mice. When they were fed a high f...

Poor prenatal nutrition permanently damages function of insulin-producing cells in the pancreas

...pancreatic beta cells, which produce insulin. But cultures of the beta cells revealed the answer: the undernourished mice had an abnormal way of responding to glucose. "They were somehow 'programmed' to secrete a limited amount of insulin later in life, no matter what signal they got from glucose," Dr. Patti...

Neuronal 'traffic jam' marks early Alzheimer's disease

...ictions of the transport hypothesis, then neuronal cultures could prove valuable in testing diagnostic and therapeutic approaches, said Goldstein. The researchers are also analyzing more brain tissue samples from humans with Alzheimer's disease, to confirm their findings of the early transport defects and th...

Novel Therapy Tested in Mice Could Chase Away Cat Allergies

...easured more than 90 percent less histamine in the cultures with GFD,?says Dr. Saxon. “Those results suggested that GFD successfully prevented the immune cells from reacting to cat allergen. The next step was to test GFD in mice that we had made allergic to the allergenic protein found in cat saliva and dande...

Scientists rid stem cell culture of key animal cells

...ifferent developmental pathways. Maintaining stock cultures in their undifferentiated state is critical. The feeder cell dogma now can be overturned, says lead investigator Ren-He Xu, a senior scientist at WiCell, a private, nonprofit research institute. "This work completely gets rid of the need for feeder ...

New SARS Protein Linked To Important Cell Doorway

...lar microbiology, applied those antibodies to cell cultures infected with the SARS virus, revealing that the virus does produce the orf7a protein. "We learned that the virus does make the protein, but we also got a big surprise when we looked at where the protein was," says Diamond. "Based on our analysis of...

Epstein-Barr virus protein crucial to its role in blood cancers

... Molecular and Cellular Biology. Using human cell cultures infected with the Epstein-Barr virus, the investigators found that a specific viral protein targets a molecule that normally regulates the cell-cycle progression, or duplication process, of resting B cells. In the presence of this viral protein ?call...

Defensins neutralize anthrax toxin

... Molecular and Cellular Biology. Using human cell cultures infected with the Epstein-Barr virus, the investigators found that a specific viral protein targets a molecule that normally regulates the cell-cycle progression, or duplication process, of resting B cells. In the presence of this viral protein ?call...

Canadian youth 4th highest in international obesity study

...milar associations were found across countries and cultures demonstrates the robustness of these findings," says Dr. Janssen. "Physical activity interventions should be a fundamental component of health campaigns aimed at reducing the global obesity epidemic." ...

Genetic defects give the immune system the green light to attack the pancreas

...d a unique set of cutting-edge technologies, using cultures of thymus cells from transgenic mice, together with DNA chips and “genome scans.?They compared non-obese diabetic (NOD) mice, which researchers elsewhere had shown to have the tolerance defect, with diabetes-resistant controls. They looked for region...

Scientists discover that three overlapping signals in embryo help get the backbone right

...y the UC Berkeley research group, has been used in cultures to maintain the growth of neural stem cells. The new UC Berkeley experiments, on frogs, show that some steps in early embryonic development are so critical that many overlapping signals are needed to ensure that cells go down the right path. The for...

Advancements In Genomics Foster Deep Sea Discoveries

... by Art Yayanos, who was the first to isolate pure cultures of high-pressure-adapted microbes from their native environments. This work was funded at Scripps Institution by the National Science Foundation. ...

Could microbes solve Russia's chemical weapons conundrum?

... (PHT). Ermakova's research team grew P putida in cultures containing mustard RM. They then moni-tored the levels of PHT derivatives in the cultures until the bacteria stopped growing, using monoethanolamine (MEA) and ethylene glycol (EG) ?both resi...

MUHC researchers make cancer target breakthrough

...olon cancer tumors in both laboratory-based tissue cultures and in mice. "Discovering that the antisense works in animal models is a major step forward, and gives us hope that this might also work in humans," explains Dr. Rozen. The research, funded by Strida Pharma--a McGill University spin-off company--als...

Mouse with designer liver has enhanced glucose tolerance, insulin response

... inside cells. Biochemical studies on Gab1 in cell cultures suggested that Gab1 is also involved in insulin signaling, but it is not clear how Gab1 acts to control insulin activity in the liver. To learn how Gab1 functions in the liver, Feng used a highly advanced genetic engineering technology, called tissu...

Innovative collaboration brings Arctic science into the classroom

...esearch effort and at the same time learning about cultures and ways of life in other parts of the Arctic. "This is a win-win situation, and it's a lot of fun!" says Holmes. The majority or Holmes' current research takes place in the Arctic (field sites are in Russia, Canada, and Alaska), and addresses how c...

Newly Discovered 'Branding' Process Helps Immune System Cells Pick Their Fights

...e Sciences, conducted their studies in mice and in cultures of mouse cells. Jeremy Herzog, a research associate in Unanue's lab, did many of the experiments and was the lead author of the study. T cells belong to a class of immune cells known as thymic-lymphocytes, which in turn are a component of the branch...

Human Eggs Can Develop From Ovarian Surface Cells In Vitro

...ress release is based on the article: Oogenesis in cultures derived from adult human ovaries Antonin Bukovsky, Marta Svetlikova and Michael R Caudle Reproductive Biology and Endocrinology, 2005, 3:17 (5 May 2005) This article is available free of charge, according to Reproductive Biology and Endocrinology's ...

Chemical Engineer Kao Explores Antibiotic Synthesis With DNA Chips

...ies of all RNA transcripts in the mutant bacterial cultures of interest. With this clever trick, one can get D...sion. In Kao's experiment, DNA copies of RNA from cultures of erythromycin-producing bacteria were infused with fluorescent dye and applied to the microarray. ...

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