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Tag: "depends" at biology news

Spleen may be source of versatile stem cells

...ncells of the nervous system, development of which depends on thecorrect production of Hox11."We know that if you have a major loss of blood, the spleen is turnedon to supplement the bone marrow in replenishing your blood supply. Wemay find that the spleen kicks in to help with many more biologicalemergencie...

It's not all genetic: Common epigenetic problem doubles cancer risk in mice

...most genes, the copy of IGF2 that should be silent depends only on which parent it came from, a situation called genomic imprinting. For IGF2, the copy inherited from the mother is always supposed to be turned off. In the mice and in some people, however, cells lack the epigenetic "marks" that sit on the DN...

Novel Enzyme Shows Potential As An Anti-HIV Target

...ion by modifying Tat. The regulation of HIV genes depends on a complex interplay between proviral DNA, cellu...re deacetylated. Thus, efficient viral replication depends on adequate Tat supplies. And since HIV gene expression relies on SIRT1’s enzymatic activity, inhibi...

The secret lives of whales

...s because 70% of all humanity (4.2 billion people) depends on seafood as its primary source of animal protein, and if the fish are seriously polluted, they may soon be unsafe to eat.?/p> Payne reasoned that by taking biopsy samples from whales and analyzing their contaminant loads, he could map levels of...

Researchers reveal the infectious impact of salmon farms on wild salmon

...e spark plugs of the entire ecosystems ?everything depends on them ?from salmon to whales to seabirds. Every commercially important fish is either directly or indirectly dependent on herring." "Previous studies have been dismissed by industry, but past studies haven't looked at such large samples or the spa...

A bacterial genome reveals new targets to combat infectious disease

...iety of other vitamins and cofactors, and probably depends on the nematode to supply them. One discovery of possible significance is the presence in the bacterium of the synthetic pathway for heme - the oxygen-carrying iron component of hemoglobin. The nematode may require heme for synthesis of developmenta...

Weill Cornell Research Reveals Secrets Of Trafficking Within Cells

...f these cells -- and others throughout the body -- depends on an internal process called endocytosis to keep the flow of cellular nutrients and information healthy and strong. It's an incredibly important life process, and now researchers at Weill Medical College of Cornell University in New York City have ...

Open microfluidic and nanofluidic systems

...ntally observed polymorphism of the wetting liquid depends only on two parameters: (i) the channel geometry, i.e., the ratio of the channel depth to the channel width; and (ii) the interaction between substrate material and liquid. One has to distinguish seven different liquid morphologies which involve loca...

Circles Of DNA Might Help Predict Success Of Stem Cell Transplantation

...e. The target that a T cell recognizes and attacks depends on the makeup of its receptor, which is constructed of protein building blocks. Each protein building block is coded by a specific gene. sjTRECs form during a "mix-and-match" rearrangement of these genes into any one of countless combinations. The ri...

Artifical cornea lets woman blind 20 years see

...rosthesis" can be inserted into it. The next step depends on the artificial cornea model being used, but typically includes connecting a front plate to a back plate with the donor cornea tissue sandwiched in between. The surgeon then removes most of the damaged cornea from the patient's eye so that the new ...

Fibril Shape Is The Basis Of Prion Strains And Cross-species Prion Infection

...y of prions in one species to infect other species depends on the shape of the toxic threadlike fibers produced by the prion. Two studies on the topic appear in the 8 April issue of the journal Cell. Although research suggests that prions from one species rarely infect other species, some scientists believ...

Computational Method Speeds Mapping of Cell Signaling Networks

... signal molecules A and B, it can detect whether B depends on A for transfer of the signal. The team's analysis predicted all but three of 18 well-studied T-cell network relationships. Although the work was largely a "proof of principle" report designed to demonstrate the usefulness of their method, their s...

Super predators and mass extinctions

...d the cycle begins again. The period of the cycle depends on mutation rates in the model. The lower the mutation rate, the longer the periods between super predators. For a sufficiently low mutation rate, the model can lead to cycles that correspond to our 26 million year mass extinctions. Previous models ...

Some Brain Cells 'Change Channels' To Fine-tune The Message

... its responsiveness, a brain cell's activity level depends on its neighbors, the nerves and other cells that connect to it. Although they don't physically touch, the cell and its neighbor are so close to one another at these connection points, called synapses, that molecules released from one cell travel imm...

Brain-injury rehabilitation depends on acetylcholine circuitry

...in to recover from such injury as stroke or trauma depends on a particular circuitry of neurons that "talk" t...e researchers also noted that brain circuitry that depends on other types of neurotransmitters such as noradrenalin, dopamine, or serotonin have also been impl...

Cooperation is key—a new way of looking at MicroRNA and how it controls gene expression

...target mRNA," says Han. "[This targeting] not only depends on their complementary sequence but on whether these proteins are around to stabilize them." Han and his Scripps Research colleagues collaborated with researchers at the Novartis Institutes for Biomedical Research in Basel, Switzerland, and at the H...

The evolutionary triumph of flower power

... attractive. So the job of propagating the species depends mainly on us. A recent article in the journal "Evolutionary Psychology" by McGuire; Jeannette Haviland-Jones, a professor of psychology at Rutgers, The State University of New Jersey; and others, states that in spite of some basic survival uses such...

Discovery clarifies role of peptide in biological clock

...ur brain. The timekeeping mechanism in these cells depends on daily cycles in gene activity. Herzog found in his latest study that the percentage of rhythmic cells in the mutant SCN was very low, and he believes these rhythmic neurons are specialized circadian pacemakers. "We suspect that at least some of ...

Precise Timing Enabled Pig-to-rat Transplants To Cure Diabetes

... pancreatic anlagen into non-immunosuppressed rats depends on obtaining anlagen prior to embryonic day 35. Transplant Immunology, vol. 15, issue 1, Sept. 2005. ...

Rabies spread speeds up

...ted rabid mammal. Controlling the spread of rabies depends on predicting the spatial dynamics of the disease ... make a strong case that halting its western march depends on a strategy based on early detection and high-powered intervention programs - a sensible approach ...

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Breaking Biology News(10 mins):Gene doubling shapes the world: Instant speciation, biodiversity, and the root of our existence 2Gene doubling shapes the world: Instant speciation, biodiversity, and the root of our existence 3Gene doubling shapes the world: Instant speciation, biodiversity, and the root of our existence 4Contaminated water linked to pregnancy complications, BU study finds 2Adolescent exposure to thc may cause immune systems to go up in smoke 2
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