Brain aneurysms of all sizes — even small ones the size of a pea — are up to 12 times more likely to rupture if they are growing, according to a new UCLA study. Published July 2 in the online edition of the journal Radiology, the discovery counters current guidelines suggesting that small aneurysms pose a low risk for rupture, and it emphasizes the need for regular monitoring and earlier treatment. "Until now, we believed that large aneurysms presented the highest risk for rupture and that smaller aneurysms may not require monitoring," said lead author Dr. J. Pablo ...

University of Adelaide research has produced a potential new antibiotic which could help in the battle against bacterial resistance to antibiotics. The potential new antibiotic targets a bacterial enzyme critical to metabolic processes. The compound is a protein inhibitor which binds to the enzyme (called biotin protein ligase), stopping its action and interrupting the life cycle of the bacteria. "Existing antibiotics target the bacterial cell membranes but this potential new antibiotic operates in a completely different way," says Professor Andrew Abell, project ...

July 3, 2013, Shenzhen, China – The international team, which included researchers from University of Copenhagen, BGI and other institutes, has successfully sequenced and analyzed the short pieces of DNA preserved in bone-remnants from a horse frozen for the last 700,000 years in the permafrost of Yukon, Canada. This is the oldest genome reported so far, which is ten times as old as the ancient Denisovan genome reported in last year. The work here laid a solid foundation for researchers to further decode other extinct species and clarify biology evolution. The Thistle ...

PHILADELPHIA - Neurodegenerative diseases are not all alike. Two individuals suffering from the same disease may experience very different age of onset, symptoms, severity, and constellation of impairments, as well as different rates of disease progression. Researchers in the Perelman School of Medicine at the University of Pennsylvania have shown one disease protein can morph into different strains and promote misfolding of other disease proteins commonly found in Alzheimer's, Parkinson's and other related neurodegenerative diseases. Virginia M.Y. Lee, PhD, MBA, professor ...

For young lizards born into this unpredictable world, their very first meal can be a major life changer. So say researchers who report evidence on July 3 in Current Biology, a Cell Press publication, that this early detail influences how the lizards disperse from their birthplaces, how they grow, and whether they survive. A quick or slow meal even influences the lizards' reproductive success two years later in a surprising way. The findings demonstrate something very important: fleeting moments in time really can change the lives of individuals and the evolutionary paths ...

PROVIDENCE, R.I. [Brown University] — Researchers are striving to understand the different genetic structures that underlie at least a subset of autism spectrum disorders. In cases where the genetic code is in error, did that happen anew in the patient, perhaps through mutation or copying error, or was it inherited? A new study in the American Journal of Human Genetics finds evidence that there may often be a recessive, inherited genetic contribution in autism with significant intellectual disability. The authors also make predictions in the study regarding how far back ...

Scientists have identified the genetic cause of a rare skin condition that causes the hands and feet to turn white and spongy when exposed to water. The study, led by researchers from Queen Mary, University of London, has provided scientists with an insight into how the skin barrier functions and could help with research into a variety of conditions. Diffuse non-epidermolytic palmoplantar keratoderma (NEPPK) is a rare condition in which individuals have thickened, yellowish skin over their palms and soles, thickened nails and suffer from excessive sweating. When their ...

Thousands of sequences that control genes are active in the developing human limb and may have driven the evolution of the human hand and foot, a comparative genomics study led by Yale School of Medicine researchers has found The research, published online July 3 in the journal Cell, does not pinpoint the exact genetic mechanisms that control development of human limbs, but instead provides scientists with the first genome-wide view of candidates to investigate. "We now have a parts list that may account for these biological changes," said James P. Noonan, associate ...

In a study that could change the way scientists view the process of protein production in humans, University of Chicago researchers have found a single gene that encodes two separate proteins from the same sequence of messenger RNA. Published online July 3 in Cell, their finding elucidates a previously unknown mechanism in human gene expression and opens the door for new therapeutic strategies against a thus-far untreatable neurological disease. "This is the first example of a mechanism in a higher organism in which one gene creates two proteins from the same mRNA transcript, ...

CAMBRIDGE, Mass. (July 3, 2013) – In a discovery that sheds new light on the aggressiveness of certain breast cancers, Whitehead Institute researchers have identified a transcription factor, known as ZEB1, that is capable of converting non-aggressive basal-type cancer cells into highly malignant, tumor-forming cancer stem cells (CSCs). Intriguingly, luminal breast cancer cells, which are associated with a much better clinical prognosis, carry this gene in a state in which it seems to be permanently shut down. The researchers, whose findings are published this week ...

It only takes one bad apple to spoil the bunch, and the same may be true of certain proteins in the brain. Studies have suggested that just one rogue protein (in this case, a protein that is misfolded or shaped the wrong way) can act as a seed, leading to the misfolding of nearby proteins. According to an NIH-funded study, various forms of these seeds — originating from the same protein — may lead to different patterns of misfolding that result in neurological disorders with unique sets of symptoms. "This study has important implications for Parkinson's disease and other ...

Tweezers are a handy instrument when it comes to removing a splinter or plucking an eyebrow. In new research, Hao Yan and his colleagues at Arizona State University's Biodesign Institute describe a pair of tweezers shrunk down to an astonishingly tiny scale. When the jaws of these tools are in the open position, the distance between the two arms is about 16 nanometers—over 30,000 times smaller than a single grain of sand. The group demonstrated that the nanotweezers, fabricated by means of the base-pairing properties of DNA, could be used to keep biological molecules ...

Lugano-Barcelona, 3 July 2013 -- For patients with advanced gastric cancer, treatment with chemotherapy after surgery can reduce the risk of cancer related death by 34% over five years compared to surgery alone, researchers said at the 15th ESMO World Congress in Gastrointestinal Cancer. At the meeting Prof Sung Hoon Noh, a gastric surgeon from Yonsei University College of Medicine, Korea, presented 5-year follow-up from the phase III CLASSIC trial, which added combination chemotherapy to a standard surgical procedure called D2 gastrectomy. The chemotherapy regimen studied ...

CAMBRIDGE, Mass. (July 3, 2013) – Whitehead Institute researchers have determined that the transcription factor Nanog, which plays a critical role in the self-renewal of embryonic stem cells, is expressed in a manner similar to other pluripotency markers. This finding contradicts the field's presumptions about this important gene and its role in the differentiation of embryonic stem cells. A large body of research has reported that Nanog is allelically regulated—that is, only one copy of the gene is expressed at any given time—and fluctuations in its expression are responsible ...

BOSTON -- A mere 25 years ago, noncoding RNAs were considered nothing more than "background noise" in the overall genomic landscape. Now, two new studies reveal that one of these tiny noncoding molecules – microRNA-22 – plays an outsized role in two types of cancer. Reported on-line today in the journals Cell and Cell Stem Cell, the two papers demonstrate in mouse models that miR-22 drives both the onset and spread of breast cancer, as well as the onset of blood cancer. The findings, led by investigators at Beth Israel Deaconess Medical Center (BIDMC), further suggest ...

CLEVELAND, Ohio (July 3, 2013)—Women with HIV are living longer, so more are entering menopause. As they do, they suffer more severe hot flashes than women without HIV, and their hot flashes take a heavier toll on their quality of life and daily functioning, found researchers at Massachusetts General Hospital. Their study was published online today in Menopause, the journal of The North American Menopause Society. That toll has the potential to undermine an already shaky foundation for their lives, compromising their health, HIV treatment, and ability to abstain from ...

Lugano-Barcelona-- New data on an emerging treatment that aims to fight colorectal cancer by stimulating the immune system have been presented at the ESMO 15th World Congress on Gastrointestinal Cancer. The findings confirm the biological action of the drug called MGN1703 and suggest it may be possible to identify which gastrointestinal cancer patients will benefit most from the treatment, reported Prof Hans-Joachim Schmoll from Martin Luther University, Halle, Germany. MGN1703 is a small DNA molecule recognised by a receptor --called toll-like receptor 9-- that is ...

Millions more people could get access to life-saving HIV drug therapy, following a landmark study led by Australian researchers based at the Kirby Institute at the University of New South Wales (UNSW). The researchers have found a lower daily dose of an important HIV drug therapy is safe and as effective in suppressing the virus as the standard recommended dose. The findings have been presented at the International AIDS Society Conference in Kuala Lumpur, Malaysia. "This has the potential to affect the treatment of millions of HIV positive people," says UNSW Professor ...

New research shows that existing copper resources can sustain increasing world-wide demand for at least a century, meaning social and environmental concerns could be the most important restrictions on future copper production. Researchers from Monash University have conducted the most systematic and robust compilation and analysis of worldwide copper resources to date. Contrary to predictions estimating that supplies of this important metal would run out in around 30 years, the research has found there are plenty of resources within the reach of current technologies. ...

Jena (Germany) Spain, France and Great Britain – these are the favourite countries of young Germans who study abroad under the ERASMUS programme. More and more German students consider one or two terms at a university abroad an essential part of their CVs. As a consequence, the number of students who spent some time at a foreign university has more than doubled over the last few years and it is estimated that about a quarter of all German students have gained some form of international experiences. And that is worth it – not only in terms of university and career success. ...

According to the new research results of the VTT Technical Research Centre of Finland, lignocellulosic biomass can be used in the production of high-quality biofuels for the price of less than one euro per litre. A new technology developed in Finland allows the transfer of more than half the energy of wood raw materials to the end-product. The technology is considered ready for the construction of a commercial-scale production plant in Europe. VTT has assessed the techno-economics of the production of renewable liquid transportation fuels from forest residues. The case ...

The European League Against Rheumatism (EULAR) has released updated recommendations for the management of RA. According to this latest guidance, treatment with disease-modifying anti-rheumatic drugs (DMARDs) should be initiated as soon as a diagnosis of RA is made, with the aim of reaching a target of remission or low disease activity in every patient. As first-line treatment, EULAR recommends rheumatologists administer methotrexate (MTX) or combination therapy of MTX with other conventional synthetic DMARDs. Low-dose glucocorticoids should also be considered in combination ...

Scientists at the University of Liverpool have shown that young people who show impulsive tendencies are more prone to drinking heavily at an early age. The research suggests that targeting personality traits, such as impulsivity, could potentially be a successful intervention in preventing adolescent drinking from developing into problems with alcohol in later life. Studies in the UK show that approximately 24% of 12 year olds have reported at least one episode of alcohol consumption, rising to 77% of 15 year olds. Previous research has suggested that impulsive ...

Amsterdam, July 3, 2013 - Elsevier, a world-leading provider of scientific, technical and medical information products and services, today announced the publication of a recent retrospective study in Reproductive BioMedicine Online to better understand treatment considerations and outcomes for same-sex male couples and single men when using assisted reproduction treatment. The number of same-sex male couples and single men using assisted reproduction assistance to have a family has been increasing over time (since 2003 a 21-fold increase has been reported). However, there ...

Exercise, even in small doses, changes the expression of our innate DNA. New research from Lund University in Sweden has described for the first time what happens on an epigenetic level in fat cells when we undertake physical activity. "Our study shows the positive effects of exercise, because the epigenetic pattern of genes that affect fat storage in the body changes", says Charlotte Ling, Associate Professor at Lund University Diabetes Centre. The cells of the body contain DNA, which contains genes. We inherit our genes and they cannot be changed. The genes, however, ...