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Tag: "microarrays" at biology news

CSIRO scientists join fight to save 'Tassie devil'

... use a variety of techniques including microscopy, microarrays and a range of molecular techniques to search for infectious agents, markers for disease and to determine where the tumours originate. “We will be working in a number of areas including establishing whether a virus or other infectious agents ar...

Study identifies 5 genetic themes key to keeping stem cells in a primitive, flexible state

..., the database includes data from thousands of DNA microarrays submitted mainly by scientists in Canada’s Stem Cell Network. All data is freely available at www.stembase.ca . Lead author Ms. Pearl Campbell noted that understanding how stem cells maintain their identity is key to the emerging field of regene...

Liver regeneration may be simpler than previously thought

...r liver were removed. Using techniques such as DNA microarrays ?which determine which genes are active in a cells ?and software programs that analyze the collected information, the scientists listed all the proteins that help the cells grow and proliferate in both samples. The results were unexpected. The r...

Scientists map key landmarks in human genome

...eosomes are located." The researchers used gene microarrays to which DNA associated with single nucleosomes was added. The nucleosomal DNA was derived from several cancer cell lines including melanoma and breast cancer, as well as several normal human cell types. A critical component of the analysis involved ...

Mutant gene causes severe kidney disease in infants

...p until later in life." U-M scientists used DNA microarrays to analyze blood samples from 26 families around the world who had children diagnosed with steroid-resistant nephrotic syndrome. After eliminating known mutations, the study team was left with DNA from 12 children with the disease. All 12 had inherit...

Researchers identify a key regulator for skin stem cells

... gene on at will in skin cells. They then used DNA microarrays to analyze which genes were affected when Tcf3 was activated. Microarrays, also known as "gene chips," enable scientists to determine the activity of thousands of genes at once. "When we compared the list of genes that Tcf3 repressed or induced, ...

Selecting life: Scientists find new way to search for origin of life

...rwhelmingly large number of possibilities." DNA microarrays provide a means to address this problem. Microarrays are produced robotically to spot tens of thousands of microscopic droplets of DNA from as many genes onto a slide, enabling scientists to measure which genes are turned on. This rapidly developing ...

Unraveling where chimp and human brains diverge

...nd biostatistics, the UCLA team used data from DNA microarrays ?vast collections of tiny DNA spots -- to map the activity of virtually every gene in the genome simultaneously. By comparing gene activity in different areas of the brain, the team identified gene networks that correlated to specific brain regions....

First biomarker for human sleepiness identified in fruit flies

...s to different kinds of sleep deprivation and used microarrays to look for changes in activity in many different genes. Amylase levels consistently changed after sleep loss. Amylases are a family of enzymes found in the saliva that break down starch. To verify amylase's connection to sleep loss, Shaw's lab mo...

Mouse study reveals new clues about virulence of 1918 influenza virus

...d Kash and colleagues examined the mouse RNA using microarrays to determine which genes were activated when exposed to each of the four viruses. This analysis showed that the immune response to the reconstructed 1918 virus containing all eight flu genes was much greater than to any of the other viruses with all ...

Einstein researchers take the pulse of a gene in living cells

...ong part of the body. Researchers customarily use microarrays (also known as "gene chips") to assess gene expre...ther tissues. But with millions of cells involved, microarrays reflect only "average" gene expression. Just how a gene is transcribed in a single cell--continuousl...

Speeding the search for elusive chromosomal errors

...retches of DNA within a sample being tested. These microarrays hold more than 100,000 DNA oligonucleotides, which...ntire complement of DNA in a cell nucleus. "These microarrays provide more rapid and precise results than karyotyping, and offer as much as 50 times higher resolu...

Predicting chemotherapy outcome

...nd Marie Curie University, Villejuif, France, used microarrays to analyse the gene-expression patterns of samples from colon tumours and liver metastases collected from 13 patients with colorectal cancer. The microarray analyses were carried out before the patients were treated with combined chemotherapy of foli...

Absence of critical protein linked to infertility

...e than four years ago. First, researchers used DNA microarrays to identify gene expression under normal and abnormal conditions during implantation. After messenger RNA profiling zeroed in on C/EBPb's activity, the researchers collaborated with Peter F. Johnson of the National Cancer Institute's Laboratory of Pr...

Yale scientists decipher 'wiring pattern' of cell signaling networks

...ts Jason Ptacek and Geeta Devgan used proteome microarrays to assay the thousands of different proteins in a ...in the yeast cell, were tested separately with the microarrays to determine which proteins were modified by each kinase. From the wealth of information generated ...

Carnegie Mellon U. transforms DNA microarrays with standard Internet communications tool

...ivation in living, complex biological systems. DNA microarrays monitor the behavior of thousands of genes over ti...and cost-effective," Bar-Joseph added. "While DNA microarrays are very powerful, they present a sampling problem," Bar-Joseph said. "DNA microarrays only take sta...

Adult stem cells aid recovery in animal model of cerebral palsy

...erpinnings of speciation, the researchers used DNA microarrays to identify global differences in the mosquito gen...in terms of methodology, this study shows that DNA microarrays can be used to identify regions of the genome that are different between two diverging species, allo...

Islands in the Genome Promote Speciation

...erpinnings of speciation, the researchers used DNA microarrays to identify global differences in the mosquito gen...in terms of methodology, this study shows that DNA microarrays can be used to identify regions of the genome that are different between two diverging species, allo...

How Fruitflies Know It's Time for Lunch

...of other neural proteins, the researchers used DNA microarrays to compare gene expression in normal flies to that in klu mutants. Any klu-controlled genes expressed at different levels in klu mutants might contain clues about the neural circuitry modulating feeding behavior. Using microarrays, Melcher and Pankr...

Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer

...tion methods to make thousands of sensors and have microarrays of these to detect cancer proteins." The researchers plan to test the technique with additional breast cancer markers, as well as with markers for other cancers. They are also planning to perform animal studies, examining the sensitivity of the ant...

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(Date:7/9/2014)... Sexual selection refers to species, selection for traits ... type of natural selection enhances opportunities to mate, the ... Biologists at the University of California, Riverside have now ... of a placenta are linked. Describing the life ... the family Poeciliidae, the researchers found that species with ...
(Date:7/9/2014)... July 9, 2014Biofuels derived from the oils produced by ... fuels. To achieve this goal, optimization of cost effective ... pond systems, is needed. Sapphire Energy has developed an ... pond algae cultivation systems, described in Industrial Biotechnology ... publishers. The article is available on the Industrial ...
(Date:7/9/2014)... Guelph scientist that involved fitting bumblebees with tiny ... neonicotinoid pesticide hampers bees, ability to forage for ... professor in Guelph,s School of Environmental Sciences, and ... July 9 in the British Ecological Society,s journal ... how long-term pesticide exposure affects individual bees, day-to-day ...
Breaking Biology News(10 mins):Biologists link sexual selection and placenta formation 2Biologists link sexual selection and placenta formation 3Biologists link sexual selection and placenta formation 4Controlling contamination in open algae ponds for biofuels 2Bee foraging chronically impaired by pesticide exposure: Study 2
(Date:7/9/2014)... -- Vasectomy was associated with a small increased risk ... or lethal prostate cancer according to a new study ... found that the association remained even among men who ... lethal cancer cannot be explained by diagnostic bias. It ... to look at the link between vasectomy and prostate ...
(Date:7/9/2014)... Studying the most common type of lung cancer, researchers ... a role in forming tumors. The new knowledge may ... these genetic changes already are available or are in ... , investigators from The Cancer Genome Atlas (TCGA), including ... Louis, Harvard Medical School and other institutions, studied tumors ...
(Date:7/9/2014)... The Miriam Hospital have found that people with ... depressed have difficulty sticking to a pulmonary rehabilitation ... women, and screening and brief treatment of depression ... study and its findings are published in print ... obstructive pulmonary disease is a common and often ...
(Date:7/9/2014)... KNOXVILLEAmphibian declines and extinctions around the world have ... chytridiomycosis, but new research from the National Institute ... another pathogen, ranavirus, may also contribute. , ... that ranavirus, which causes severe hemorrhage of internal ... populations of wood frogs if they are exposed ...
(Date:7/9/2014)... conducted by researchers at Tufts University School of Dental ... and developmental disabilities, the likelihood of having cavities decreased ... The findings, published in the July/August issue of ... designed to address the oral health of individuals in ... records of 107 patients at one of the eight ...
Breaking Medicine News(10 mins):Health News:Vasectomy may increase risk of aggressive prostate cancer 2Health News:Lung cancer study hints at new treatments 2Health News:Miriam Hospital study examines effect of depressed mood on pulmonary rehab completion 2Health News:Study predicts ranavirus as potential new culprit in amphibian extinctions 2Health News:Adults with special needs see gains, challenges with long term oral care 2Health News:Adults with special needs see gains, challenges with long term oral care 3
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