Tag: "channels" at biology news

Study implicates potassium channel mutations in neurodegeneration and mental retardation

... codes for one of the proteins that form potassium channels pore-like openings in the cell membrane that cont...ave found abnormalities in the number of potassium channels in Parkinson's, Alzheimer's, and Huntington's diseases. Together with the new study, these findings...

Mechanism for memory revealed in neurons of electric fish

... by turning on special cell membrane channels. The channels give the fish neurons the ability to retain a memo...utation that neurons do," says Zakon. "We have ion channels [in the neurons] and we know those are activated. The mystery is how a short stimulus leads to such ...

VCU study shows Levitra may protect the heart

...age of the heart by opening the mitochondrial KATP channels in cardiac cells. Mitochondria are cellular organelles critical for converting oxygen into ATP, the key fuel for cellular function. "This study provides important information about the mechanism by which the PDE-5 inhibitors work. Furthermore, it is...

JCI table of contents, February 9, 2006

...inhibitor of normal ROMK in kidney cells. The ROMK channels from Cftr-deficient mice also demonstrated an impa... PKA-regulated ATP sensitivity of Kir1.1 potassium channels in mouse kidney AUTHOR CONTACT: Steven C. Hebert Yale University School of Medicine, New Haven, Con...

How sperm crack the whip

...atSper1 block fertilization in mice. And since the channels in human sperm are very similar, there's no reason to believe you couldn't develop a male or female birth control pill that would block the protein before it functions to hyperactivate sperm, preventing fertilization," he said....

Capturing the electrical activity of sperm

...ity will also allow the researchers to study other channels that regulate sperm behavior. For example, the sperm head also contains calcium channels whose identity and functions are unknown. The channels may help the sperm release enzymes that disso...

Stable polymer nanotubes may have a biotech future

...T nanotubes may have biotechnology applications as channels for tiny volumes of chemicals in nanofluidic reactor devices, for example, or as the "world's smallest hypodermic needles" for injecting molecules one at a time. Carbon nanotubes are of keen interest in nanotechnology research, especially for making ...

Gene variation increases SIDS risk in African Americans

...ade no difference. Cells with the normal or Y1103 channels "were found to function indistinguishably," the au...re acidic environment, the cells with the abnormal channels began to misbehave. In normal cells, these sodium channels are closed at rest. In response to ele...

Molecular force field helps cancer cells defend against attack

..., or VEGFR-3. The protein is tied to the growth of channels in the lymph system that serve as cellular superhighways for cancer spread and is found in breast, colon and thyroid tumors. Cance and colleagues were the first to pull FAK out of human tumors and to show that human cancers make the molecule in large...

Secrets of the sea yield stronger artificial bone

...are expelled from the forming ice and entrapped in channels between the ice crystals. The result is a layered structure that roughly resembles nacre's wafer-like construction. The Berkeley Lab team believed this same freezing process could be used to cast an exquisitely layered material that comes close to mi...

Cardiovascular and immunology research alliance announced by Yale and Boehringer Ingelheim

... line blood vessels, the identification of calcium channels in cells that mediate immunity, the protection of kidney blood vessels from hypertension, and the therapeutic potential of the regulatory protein HIF-1a in the cardiovascular system. Both the projects and the funding will be flexible and have two ph...

Master genetic switch found for chronic pain

...nerve cells was impaired. The animals had lost ion channels known to be involved in reacting to painful heat o...ranscriptional control program for many of the ion channels and receptors known to transduce noxious stimuli has intriguing implications for the design of more ...

Academy honors 15 for major contributions to science

...rphology and dynamics of natural and managed river channels at a range of scales." The prize was established by a bequest of Emily B. Warren in memory of her father and has been presented since 1969. Also to be honored at the April 23 ceremony is NORMAN R. AUGUSTINE, retired chairman and CEO, Lockheed Martin...

Protein 'nanosprings' most resilient found in nature

...sduction. Ankyrin proteins also coordinate the ion channels and transporters that control the beating of the heart. In 2004, Bennett's team linked mutations in the gene ankyrin-B to an inherited cardiac arrhythmia syndrome that can lead to sudden death ( http://www.dukemednews.org/news/article.php?id=9389 ). ...

Machinery of the 'marijuana munchies'

...he endocannabinoid effects by inhibiting pore-like channels in the neurons that regulate the flow of calcium into the neurons. Such calcium is necessary for the synthesis of endocannabinoids. In further studies of mice genetically altered to be leptin deficient, the researchers found the DSI to be more prolon...

Aquaporin and obesity

...ommon to human obesity and the evaluation of these channels as a possible means for therapeutic treatment. Pioneering team The Multidisciplinary Team of diagnosis and treatment of obesity is a project begun in 1999. Later, the Hospital aided in the creation of the Metabolic Research Laboratory of the Un...

Membrane research opens window to benefits for plants, humans

... conserved in them. "Plant cells close their water channels in response to drought stress in order to preserve... the structural difference between open and closed channels is telling. When open, the protein allows water to go through; when closed, its pore size is reduced...

Sahara's edge studied from ground, air and space to improve water management

...superior in geometric resolution and the number of channels or polarisations to the capability of presently orbiting satellites - will also be used to anticipate the performance and usefulness of future satellite sensors. Aquifer and TIGER The Aquifer Project has in addition to SASS a second working area,...

New technique helps researchers determine amino-acid charge

...acking. All cells have membrane proteins that form channels to allow water and/or ions to pass through. Malfunctions have been linked to such problems as hypertension, abnormal insulin secretion, abnormal heart conditions and brain seizures. As a result, these membrane proteins are often targeted by drug trea...

Leibniz Prize winners 2006

...ning the interactions between the various membrane channels and neurotransmitters involved in these communication processes and to representing the sequence in which this communication takes place. His work is related to the research conducted by Nobel Prize laureate Erwin Neher, and it has advanced progress ...

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(Date:7/24/2014)... NEW YORK, NY (July 24, 2014) Scientists ... Research Institute are one step closer to creating ... from a patient,s own cells. , For ... stem (iPS) cells lines from skin samples of ... they developed an accelerated protocol to induce these ...
(Date:7/24/2014)... numbers have decreased by 45% on average over a ... reports a study on the impact of humans on ... enormous benefits invertebrates such as insects, spiders, crustaceans, slugs ... and pest control for crops, decomposition for nutrient cycling, ... in Science and led by UCL, Stanford ...
(Date:7/24/2014)... A new study has identified two factors that ... increase the production of highly qualified physics teachers. ... to champion physics teacher education in combination with ... initiatives remain viable. Science, Technology, Engineering and Math ... and the study points the way for institutions ...
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