mediated

A new mechanism of regulating RNA degradation

...egulated by cell signaling pathways, such as those mediated by changes in growth conditions." That would allow the cell to differentially control the level of SMD-target RNAs, while leaving the NMD-regulated RNAs untouched. This is likely to be the "tip of the iceberg" for Staufen1's function in mammalian ce...

FDA Approves Human Hookworm Vaccine for Phase I Safety Trials

...egulated by cell signaling pathways, such as those mediated by changes in growth conditions." That would allow the cell to differentially control the level of SMD-target RNAs, while leaving the NMD-regulated RNAs untouched. This is likely to be the "tip of the iceberg" for Staufen1's function in mammalian ce...

U of M researcher examines newly emerging deadly disease

...curs. In addition, because toxic shock syndrome is mediated by superantigens, it is possible that intravenous immunoglobulin therapy may be indicated. Of the five patients observed in the Minneapolis-St. Paul area during the period of 2000-2004, four of the patients were previously healthy and four of the pat...

Yale researchers identify molecule for detecting parasitic infection in humans

...nition of T. gondii by the innate immune system is mediated by a new member of the TLR family, TLR 11, that we discovered last year," said Sankar Ghosh, professor of immunobiology at Yale School of Medicine. "We further found that the specific recognition molecule was Toxoplasma profilin. The innate immune sy...

Stopping smallpox in its tracks: A new anti-viral approach

...apy ?a low molecular weight inhibitor of signaling mediated by the smallpox growth factor (SPGF). SPGF targets the erbB-1 signaling molecule, which normally initiates an intracellular cascade that facilitates viral replication. This study shows that drugs that interfere with erbB-1 signaling inhibit SPGF-in...

Key mechanism in genetic inheritance during cell division identified

...at binding between the ring and the microtubule is mediated by flexible domains, and is largely electrostatic in nature. This could allow for lateral sliding or diffusion of Dam1 rings along microtubules. Analysis of the Dam1 rings after disassembly of microtubules, revealed an accumulation of rings at the en...

Researchers develop assay that could be applied to drug screening

...rtant routes for cargo internalization is clathrin mediated endocytosis (CME). CME is of fundamental importanc...merization. "The role played by actin in clathrin mediated endocytosis has been controversial for a long time," Zenisek said. "We've now shown in live cells th...

Gene Bridges And Covalys To Develop Restriction-Enzyme-Free SNAP-tag Gene Fusion Kits

...atented Red/ET Recombination, also known as lambda mediated cloning, enables cloning and precise manipulation and modification of DNA molecules regardless of restriction sites and is particularly useful for the rapid generation of targeting vectors, modification of BACs and E. coli chromosomes, as well as vir...

When in danger humans are similar to a deer in the headlights

... species when confronted with threatening stimuli, mediated by neural circuits that promote defensive survival," author Eliane Volchan explains. This study is published in the current issue of Psychophysiology. Media wishing to receive a PDF of the full article please contact journalnews@bos.blackwellpublish...

Stem cells bring fast direct improvement, without differentiation, in acute renal failure

...IGF-1, all known to improve renal function in ARF, mediated by their antiapoptotic, mitogenic and other cytokine actions," the paper said. "Specifically, these as yet incompletely defined paracrine actions of MSC result in the renal downregulation of proinflammatory cytokines IL-1-beta, TNF-alpha, and IFN-ga...

Studies on human genome variation provide insight into disease

...lves a deletion on chromosome 22. The deletion is mediated by rare repetitive sequences that flank genes crucial for proper development of the heart, face, and upper thorax. Dr. Bernice Morrow and her colleagues describe in this month's issue of Genome Research how they examined these flanking repetitive ...

Housecat-sized Siberian tiger cubs get collared

...lves a deletion on chromosome 22. The deletion is mediated by rare repetitive sequences that flank genes crucial for proper development of the heart, face, and upper thorax. Dr. Bernice Morrow and her colleagues describe in this month's issue of Genome Research how they examined these flanking repetitive ...

Plant gene related to cancer treatment may foster new oncology drugs

... that both the uptake and release of molecules are mediated by interaction between the PGP transporter proteins and PIN facilitator proteins," Murphy said. ...

Membrane research opens window to benefits for plants, humans

...e two types of closing events, both mechanisms are mediated through the same structural elements of the protein -- that is by plugging the cytoplasmic entrance of the channel with an eolongated intracellular loop." By atomic scale, the structural difference between open and closed channels is telling. When ...

Synthetic Protein Eases Arthritis Symptoms in Mice

... both TNFRs and thereby inhibit beneficial actions mediated by TNFR-2. The scientists next aim to develop a more stable form of P60 PLAD. Ultimately, they hope to test the protein in clinical trials. The research was also supported by the National Institute of General Medical Sciences, part of the NIH. ...

Have a taste for fat? Yes! A sensor in the mouth promotes preference for fatty foods

...at and the changes in gastrointenstinal secretions mediated by oral delivery of lipids. These findings unveil one potential pathway mediating fat taste. The data suggest that an alteration in the fat perception system might increase obesity risk through feeding dysregulation. In an accompanying commentary...

UCSD study finds anthrax toxins also harmful to fruit flies

...similar mechanistically to wound healing, which is mediated by the same signaling pathway in humans. The EF toxin is also lethal when applied to fly larvae and can cause severe malformation in the wings of adult fruit flies--an effect that can also be understood as an interruption of another unrelated signal...

Common bacteria pirate natural mechanism to get inside cells

...ystem," says Dr. Daaka. "We think their hiding is mediated through dynamin. This is not only applicable to this particular pathogen but for many more." Dr. Daaka, who studies receptor signaling, likens receptors to television antennae that control relay of signals from outside the cell to inside by turning ...

GlycoFi announces the first production of antibodies with human glycosylation in yeast

...glycoforms showed significantly increased antibody mediated cell killing compared to Rituxan®. "By controlling the sugar structures on antibodies we have shown that the antibodies ability to kill cancer cells can be significantly improved and that therapeutic proteins can be optimized by controlling their su...

Darkness unveils vital metabolic fuel switch between sugar and fat

...time delays pointed to the gene's expression being mediated by something in the blood. Another lab test showed elevated levels of 5'-AMP in the blood of mice exposed to constant darkness compared to those kept in the regular light-dark cycle. To confirm the connection, the team injected 5'-AMP into mice exp...

New insight into machinery of immune cells' 'tentacles'

...t. "The prevailing dogma was that this function is mediated by a protein called WASp. However, mice lacking WASp can still form immunological synapses, so we proposed that there was another unidentified pathway that regulated the process." In their experiments, the researchers concentrated on a protein calle...

Montreal researchers identify defects of immune cells

...n these transgenic mice by preventing T lymphocyte mediated acquired immunity to Candida albicans. The results also showed extensive perturbations in the production of cytokines required for protection against oral candidiasis in the transgenic mice. "These findings regarding the specific immune defects whic...

Life and death in the hippocampus: what young neurons need to survive

...ge. "Now we show that stimulation may, in part, be mediated through the NMDA receptor." Those studies had also shown that young and middle-aged "exercised" rats perform better on learning tasks such as maze swimming, indicating that new neurons are more than just a backup supply but actually enhance learnin...

Neural stem cell gene plays crucial role in eye development

...evelopment in these mice results from loss of SOX2 mediated maintenance of the neural progenitor cell population in the eye. According to Pevny, the study demonstrates that normal development of the eye is contingent upon having the right amount of SOX2, expressed at the right time and place. "Too little SO...

Higher levels of obesity associated with greater health risks

... of the obesity-related mortality and CHD risk was mediated by diabetes, hypertension, and hyperlipidemia [high cholesterol levels]. In white women, as other studies have found, weight-related all-cause mortality risk was modified by age, with obesity conferring less risk among older women. Smoking may modify...

Selectively blocking inflammatory signals may protect mice from MS

...ted from the "harsh environment" present in immune mediated demyelinated lesions, said Popko. ...

PNAS study reveals why organs fail following massive trauma

...es and proteins that play a central role in T-cell mediated immune and organ failure. Given that severe trauma effects as many as 20 percent of the 20,000 or so human genes, finding the genes and proteins involved in T cell anergy and apoptosis amid this storm has been a challenge. Researchers took blood sa...

Pleasure and pain: Study shows brain's 'pleasure chemical' is involved in response to pain too

...sk for drug abuse after initial exposures could be mediated by individual differences in the response of this neurotransmitter system to various forms of stress, with pain being itself a physical and emotional stressor," write the authors, led by David J. Scott, Ph.D., a graduate student at MBNI. "The dopamin...

Most important actors in the growth process of neurons identified

...ly, the researchers have found that axon growth is mediated by an interaction among three signal cascades: Wnt, FGF and JNK. JNK is necessary for stimulating the growth of axons. Wnt activates JNK and FGF inactivates JNK, so the right balance between Wnt and FGF provides for a precise regulation of the growth...

Distinguishing friend from foe in the battle against cancer

...sistance to the chemotherapeutic drug rapamycin is mediated by the survival factor NF-kB. Rapamycin, like the...use they couldn't activate a major line of defense mediated by the Nuclear Factor kappa B, known as NF-kB, which triggers both inflammatory and survival respons...

Erectile dysfunction in diabetes is due to selective defect in the brain

...The researchers hypothesized that the blunted NMDA mediated responses in diabetes reflects an impaired NO mech...VN. The involvement of an NO mechanism in the NMDA mediated behavioral response was also explored. Methodology The rats were exposed to a light/dark cyc...

What recognizes what in plant disease resistance?

...epeat domain, the authors show that association is mediated by a completely different region on N's Toll-interleukin-1 receptor homology domain, which is structurally similar to animal innate immunity molecules. These findings provide novel insights into how R proteins recognize pathogen Avr proteins and shou...

Individual differences in a clock gene predict decline of performance during sleep deprivation

...hat the effects of this gene on performance may be mediated by its effects on sleep. When the volunteers were allowed to sleep normally, those possessing only the longer form of the gene spent about 50% more of their time in slow-wave sleep, the deepest form of sleep. Slow-wave sleep is a marker of sleep need...

Mechanism of nicotine's learning effects explored

...BAergic neurons affected signaling between neurons mediated by the key substance calcium. The researchers also discovered key details of the mechanisms by which nicotine excites different kinds of “interneurons?in the prefrontal cortex. Interneurons are the way-stations for neuronal impulses, passing neuro...

To sleep, perchance to dream: New insight into melatonin production

...rchers found that rodent AANAT mRNA translation is mediated by IRES (internal ribosome entry site) elements in the 5' end of the transcript, through binding of another protein, called hnRNP Q. In fact, siRNA knock-down of hnRNP Q reduced AANAT and melatonin production under nocturnal conditions. ...

HIV and malaria combine to adversely affect pregnant women and their infants

...researchers demonstrated that protection to PAM is mediated by a special type of antibody that allows women to preferentially clear the parasites in their placentas. They found that HIV-infected women lose these antibodies and again become susceptible to the ravages of PAM. The findings, according to Kain,...

Researchers track how spores break out of dormant state

...ntify the earliest stages of a wide range of spore mediated diseases, including botulism, gas gangrene and pulmonary anthrax,” said Alexander Malkin, senior author from LLNL’s Biosciences and Biotechnology Division. “But it’s also important to gain fundamental insights into the key events in bacterial cell de...

Scratch no more: Gene for itch sensation discovered

...painful stimuli, indicating that pain and itch are mediated by separate sets of genes in the spinal cord. This suggests that drugs can be used to suppress the itch sensation without affecting the pain sensation, according to Chen. And because pain can be an important protective cue that warns of danger, it ma...

Genomic Analysis Uncovers New Targets for HIV Vaccine

...hat a vaccine could be designed to elicit an HLA-C mediated response which HIV-1 might be unable to defuse. "This study was the first time a genome-wide approach has been used for an infectious disease," Goldstein said. "Past studies have looked at individual candidate genes. Since different people respond d...