Tag: "rise" at biology news

3 proteins may play important role in nerve-cell repair

...of the proteins were associated with a significant rise in the level of an important signaling molecule inside the nerve cells called cAMP. This molecule plays a key role in regulating nerve-cell growth, differentiation and survival, and the regeneration of long parts of the cell called axons that carry t...

Stem cells act through multiple mechanisms to benefit mice with neurodegenerative disease

...ors, deformation, a worsening of symptoms, or gave rise to inappropriate cells types. Neither cell type was rejected by the immune system. In fact, no immunosuppression was needed at all. Finally, the human embryonic stem cells were grown without mouse feeder layers and in a "defined" culture medium that ...

Antifungal drug kills TB bug

...ne per second. Of equal concern is the dramatic rise in the incidence of new strains of TB that are resistant to traditional antibiotics. As a result, the World Health Organisation, the Bill Gates Foundation and the European Union have all launched initiatives to tackle the problem. Now, biologists ...

Scientists discover new, readily available source of stem cells

...otic fluid ? estimated at 1 percent ?that can give rise to many of the specialized cell types found in the... "The full range of cells that AFS cells can give rise to remains to be determined," said Atala. "So far, we've been successful with every cell type we've ...

Indicators for risk of heart disease are higher in passive smokers

...k, home or elsewhere results in a disproportionate rise in markers that increase the risk of cardiovascular disease, University of Nottingham researchers have found. A new study published in Circulation, a journal of the American Heart Association, measured the level of cotinine in participants' blood, r...

How badger culling creates conditions for spread of bovine TB

...ng policies have been accompanied by an inexorable rise in the incidence of TB in cattle. Indeed, it has become apparent that the various strategies may actually have been a contributory factor to the increase in disease through perturbation. The results presented in this paper lend weight to this argumen...

Tumor-suppressor gene is critical for placenta development

...chers shut off the Rb gene in stem cells that give rise to most of the placenta, resulting in an abnormal ... These stem cells divided far too often. They gave rise to too many cells and formed a defective placenta, especially where the placenta interacts with the ...

University of Alberta researchers unravel intricate animal patterns

...il to the core elements of communication that give rise to the patterns found in large scale groups." In particular, the researchers looked at the direction from which animals can receive signals from their neighbors. "For example, some species of birds use directional communication, and therefore, we ...

UBC researchers reveal dwarf aquatic plants' hidden ancestry

...ave been piecing together the details of the rapid rise and early diversification of flowering plants," says Graham. "Discovering this living plant’s ancient heritage makes us re-evaluate our understanding of early flowering-plant evolution. For botanists, this is like finding something you thought was a ...

Gene that makes people 'early to bed and early to rise' demystified

...inserted into otherwise normal mice causes them to rise early, symptoms that mirror those in people with FASPS. In contrast, a mutation that mimicked an increase in phosphorylation at amino acid 662 increased the transcription of PER2 and pushed the animals' sleep pattern later. Their studies in mice re...

Protein sensor for fatty acid buildup in mitochondria

...als who have mutations in the PANK2 gene that give rise to PanK-associated neurodegeneration (PKAN), an inherited disease in which patients have intellectual impairment and difficulty in walking and speaking. "The new understanding of PanK2 activity and its location in the cell suggests a potential tr...

Warming oceans threaten Antarctic glaciers

...se two ice-sheets were responsible for a sea level rise of 0.35 millimetres per year over the past decade ...ising concerns that global sea level could rapidly rise if the oceans continue to warm. Dr. Andrew Shepherd, at the University of Edinburgh’s School of G...

Global 'sunscreen' has likely thinned, report NASA scientists

... early 1990s could have given an extra push to the rise in global surface temperatures. The finding, publi...serving satellites, finding out whether the recent rise and fall of aerosols is due to human activity or natural changes will have to await the planned laun...

New research shows that flu is a trigger of heart attacks

...ows that influenza epidemics are associated with a rise in deaths from heart disease and that flu can actu...own that influenza epidemics are associated with a rise in coronary deaths. This calls for more intensive efforts to increase the vaccination rate in people...

How genetic malfunction causes a form of retardation

...e, could explain how the genetic abnormality gives rise to the neural pathology of the disorder. More broadly, they said, the new insight into the mechanism underlying NS could apply to other inherited forms of retardation. Freda Miller of the Hospital for Sick Children and University of Toronto and coll...

Mystery of fossilized trees is solved

...gnificant moment in the history of the planet. The rise of the forests removed a lot of Carbon Dioxide from the atmosphere. This caused temperatures to drop and the planet became very similar to its present-day condition." Dr Berry worked with colleagues from Binghampton University, New York and from N...

The origin of the brain lies in a worm

The rise of the central nervous system (CNS) in animal evol...em, what it might have looked like and how it gave rise to the diversity of nervous systems seen in animals today is what Detlev Arendt and his group study ...

Parasite infection may benefit MS patients

A steady rise in autoimmune diseases such as multiple sclerosis (MS) has been noted in recent decades, and environmental factors could be the cause of this increase. One theory, similar to the "hygiene hypothesis" in which an excessively germ-free environment may ...

Can engineered immune cells stop AIDS?

...AIDS Day (Dec. 1, 2006) that the disease is on the rise again. More than 39 million people around the world are now infected with HIV, the foundation reported. "I think we are finally on the right track," Wang says. "If scientists can find a way to genetically engineer immune cells to neutralize HIV, we...

Leukemic cells find safe haven in bone marrow

..., the researchers reported. Mesenchymal cells give rise to a variety of different tissues, such as osteoblasts (bone-building cells) and chondrocytes (cartilage-building cells), and form the nurturing environment where normal blood cells and leukemic cells grow. "Leukemic cells that resist asparagina...

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