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Tag: "artificially" at biology news

Scientists ID molecular 'switch' in liver that triggers harmful effects of saturated and trans fats

... Trans-unsaturated fatty acids, or trans fats, are artificially produced solid fats used in shortening and margarine, baked goods, and the oils used to cook french fries and other fast food. Studies have shown that trans fats not only raise LDL levels in the bloodstream but lower high-density lipoproteins (HDL, o...

Ophthalmologists Use Artificial Silicon Retina Microchip To Treat Vision Loss

... use of the subretinal space to hold a device that artificially stimulates the retina seems a logical step in replacing the loss of photoreceptor cells of the retina. If the implant is tolerated well and is able to successfully stimulate the retina, it may open up new opportunities for restoring sight in patients...

Ophthalmologists implant five patients with artificial silicon retina microchip

... use of the subretinal space to hold a device that artificially stimulates the retina seems a logical step in replacing the loss of photoreceptor cells of the retina. If the implant is tolerated well and is able to successfully stimulate the retina, it may open up new opportunities for restoring sight in patients...

Liposome finding implies electrical effect on cell development

... liposomes ?cell-like "water balloons" composed of artificially created phospholipid bilayers similar to natural cell membranes ?have revealed unexpected behavior in the presence of electrical fields that may provide a paradigm-shifting change in science's understanding of biomembrane function in operating living...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...r. Scientists suspect that many harmful blooms are artificially fueled by fertilizer runoff from farms, which dump...ides and dead zones According to the researchers, artificially induced algal blooms could have major impacts on recreational and commercial fishing, major industri...

Ancient immune defense mechanism is no match for HIV-1

...reproduce itself. Although this mechanism has been artificially manipulated to selectively inhibit specific genes in mammalian cells, it was not known whether mammalian viruses naturally elicit this type of immunity in vertebrate cells. Drs. Yamina Bennasser and Kuan-Teh Jeang from the Molecular Virology Section...

Natural Killers Could Lead to New Hepatitis Treatments

...ced patrolling, as well as a decreased severity of artificially induced hepatitis. “So, all the evidence we can obtain so far points to CXCR6 being involved in promoting survival of these NKT cells when they get into the environment of the liver, and that's how the cells tend to accumulate there,?said Littman. “...

Researchers pioneer new gene therapy technique using natural repair process

... The findings are available online in Nature. By artificially initiating a DNA repair process known as homologous recombination, Dr. Matthew Porteus of UT Southwestern, working with scientists from Richmond, Calif.-based Sangamo Biosciences, was able to replace a mutated version of the gene that encodes a porti...

ORNL, UC Berkeley unravel real-world clues to Earth's mysteries

...ese communities. This is because the commonly used artificially cultivated organisms lack the diversity found in nature, so potentially critical community and environmental interactions go unsampled. Raymond Orbach, director of DOE's Office of Science, noted that this research offers a glimpse of what will be po...

Scientists succeed in cloning human embryos from eggs matured in the lab

...r time for nuclear re-programming the oocytes were artificially activated by incubation in a medium containing calcium ionophore, which enabled the injected nucleus to prepare for the first embryonic division. Mr Heindryckx said: "Eighteen out of the 25 in vitro matured MII oocytes survived this nuclear transfer...

Invitrogen Launches i-Path -- A Unique Systems Biology Platform at BIO 2005

...r time for nuclear re-programming the oocytes were artificially activated by incubation in a medium containing calcium ionophore, which enabled the injected nucleus to prepare for the first embryonic division. Mr Heindryckx said: "Eighteen out of the 25 in vitro matured MII oocytes survived this nuclear transfer...

Why do aneurysms form? New studies suggest leading role for white blood cells

...t the levels of the cells circulating in the blood artificially low. They applied the enzyme elastase to the aortas of these mice and normal control mice. Two-thirds of the control mice developed an aneurysm at the injury site within two weeks, with an aneurysm area twice the normal size on average. In contrast, ...

DNA size a crucial factor in genetic mutations, study finds

... system readily used a base-or nucleotide-that was artificially created is itself groundbreaking. ''Here we have, I think, the first example of an efficient, human-designed nucleotide working in a live cell,'' he says. Kool and the gang are now exploring ''the funny finding that the bugs prefer DNA that's larger...

Bacteria that cause tooth decay able to survive without important biochemical pathway

...not contend with sudden environmental change. When artificially shocked with acid to a pH below that where tooth demineralization begins, the altered bacteria became sick and unable to grow. Shocking the bacteria with other environmental stressors, such as high salt levels or the presence of hydrogen peroxide, al...

Picking apart how neurons learn

... receptors from cell surfaces. When PICK1 is added artificially back into these neurons, AMPA receptors are removed and LTD is restored, showing that PICK1 is necessary for LTD. Mice lacking the part of the AMPA receptor thought to physically interact with PICK1 also do not establish LTD. This result confirms t...

Taking a bite out of a fellow worker helps wasps recruit new foragers

... Behaviour, he describes an experiment in which he artificially removed active foragers from four wasp colonies to see how new foragers are recruited. He found that biting was directed at certain individuals, who previously hadn't left the nest, to induce them to begin foraging. The rate of being bitten increas...

Single microRNA causes cancer in transgenic mouse

... the study suggests that a newly emerging class of artificially designed molecules (called antagomirs) may be able to block miR 155 expression and be an effective therapeutic strategy in patients with acute lymphoblastic leukemia or high grade lymphomas. ...

Loosen leash on cancer protein 'watchdog,' researchers say

...tein, known only by the technical name of p53, was artificially increased in the cells of laboratory mice, those known to have a hereditary predisposition for developing cancer showed a marked decrease in tumor development when compared with mice that had normal p53 activity. The study also indicated that the tr...

More evidence mammals, fruit flies share make-up on function of biological clocks

...r a mutant version of Cry, or with Cry produced at artificially high levels. In both cases, they found that the clock had stopped ?with high levels of clock gene expression when Cry was mutated, and low levels when Cry was over-produced. These results indicated that Cry normally inhibits clock gene expression in ...

Chewing up a key regulator of fat synthesis keeps mice lean despite a high-fat diet

... Qi, Ph.D., reasoned that keeping the TRB3 pathway artificially "on" during both fasting and feeding might melt away fat depots. And that's exactly what happened. Mice genetically engineered to express permanently elevated levels of TRB3 protein in fat tissue were 10-20 percent skinnier than normal mice. "Even w...

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