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Tag: "animal" at biology news

Global map shows new patterns of extinction risk

... basing conservation decisions on just one type of animal can be very misleading. The study, out in today's issue of Nature, is the culmination of many decades of work by field biologists and analysts, during which the planet was divided up into 100km x 100km grids, and all mammal, bird and amphibian spe...

Low levels of neurotransmitter serotonin may perpetuate child abuse across generations

...t abuse in primates. Other research using rats as animal models has shown that serotonin production is influenced by a mother's treatment of her offspring early in their lives and affects the offsprings's responses to stress in adulthood. In earlier research on abuse of infant monkeys, Maestripieri and ...

NASA snow data helps maintain nation's largest, oldest bison herd

...y at CSUMB. "Ecologists try to best understand how animal populations respond to the changing conditions of the landscape where they live. Snow is a very important factor in the livelihood of all wildlife species in the ecosystem, including the Yellowstone bison population," said Watson. The release of c...

Antibiotic inhibits cancer gene activity

...er cell lines in the laboratory and in preliminary animal experiments before human trials could be planned. Only a tiny fraction of promising candidate drugs enter clinical trials, and few of those are ever approved. Gartel said the participation of the late Robert Costa, professor of biochemistry and mol...

Cloned mice created from fully differentiated cells, a milestone in cloning research

...that adult stem cells are necessary for successful animal cloning, proving instead that cells that have comp...wn kind. This is the first demonstration that an animal can be derived directly from a fully differentiated cell, report lead researchers Xiangzhong (Jerry)...

Signal protein shows promise for blocking tumor promoters in skin cells

...iversity of Pennsylvania School of Medicine. Using animal models, the researchers discovered that Srcasm acts like a brake in epithelial cells, preventing uncontrolled cell growth caused by a family of proteins called Src kinases. This finding, published online in the Journal of Biological Chemistry, sugges...

Neuron cell stickiness may hold key to evolution of the human brain

...abilities that distinguish us from the rest of the animal kingdom," said Rubin. "We have long suspected that it would be a combination of DNA sequences coding for genes and DNA sequences that control when genes are switched on or off. In this study by comparing the entire genome of many organisms to that ...

Unique gene regulation gives chilly bugs survival advantage at bottom of the world

...ut it's still the largest free-roaming terrestrial animal to inhabit Antarctica. The larvae resemble tiny black worms. "It's the largest species that has adapted to living on the continent year-round," said Denlinger, adding that other native animals, such as seals and penguins, spend much of their time i...

Living view in animals shows how cells decide to make proteins

...versity Medical Center have visualized in a living animal how cells use a critical biological process to dic...cing process can change even from day to day as an animal develops, he said, adding that extracting cells and watching them in a culture cannot convey all of ...

Theory of oscillations may explain biological mysteries

...extensions of established theory suggest that many animal and plant populations oscillate in synchrony because of interactions such as predation and competition. Such synchronization can have far-reaching effects. Vandermeer suggests that several well-known biological conundrums, such as the higher-than-exp...

New approach to BSE successful in lab

...d on human beings.?The method is also relevant for animal breeding: in principle it can be used to breed cattle which cannot produce any PrP-C. They would then be resistant to BSE. ...

Are genomic technologies the answer to world hunger?

...o improved yields of food crops for both human and animal consumption. Researchers are also working on 'molecular farming' ?production of pharmaceutical products in plants, with the potential to revolutionise vaccination procedures. However, these technologies are only likely to impact on world hunger if t...

New gene linked to bipolar disorder

... cause bipolar disorder. Using techniques such as animal models will help us to fully understand the mechanisms behind this gene and explore how we might be able to intervene in these mechanisms, to help people with the disorder. "We hope our discovery will eventually lead to new treatments for depressi...

Fight weeds with plant pathogens

...cosystem processes and displacing native plant and animal species. In addition, weeds serve as reservoirs for plant pathogens that impact crops. According to Rosskopf, there are two approaches used for managing weeds with plant pathogens-the classical biological control approach and the bioherbicides app...

Einstein researchers demonstrate a novel approach to treating AIDS

...nd microbiology & immunology. In a series of animal studies beginning in 2001, Dr. Dadachova and her colleagues have successfully used radioimmunotherapy against a variety of disease-causing microbes­first the major fungal pathogen Cryptocccus neoformans, which can cause life-threatening encephaliti...

Lost in the labyrinth

...ues and organs in developing embryos of nearly all animal species. It also helps organisms manage stem cells, by keeping them on hold and preventing their differentiation until the right time. Such pathways are usually switched on and off by external stimuli that help cells respond properly to the environme...

Cities change the songs of birds

...h states that some aspects of the vocal variety of animal communication sounds are shaped by the environment. The authors point out that song divergence within a species as a result of such “environmental shaping?could potentially play a crucial role in the process of speciation, although it is not at all c...

Tiny Tampa Bay fish key to evolution of immune system

...e." Organisms such as plants, fungi and primitive animal life are classified as having an innate immune system, which defends against invaders by recognizing predetermined patterns of molecules. About 520 million years ago, a different form of immunity emerged - the adaptive immune system, shared by humans...

Why do some queen bees eat their worker bee's eggs?

... worker policing. This theory is widespread and in animal behavior textbooks. However, Hamilton's relatedness hypothesis was challenged in 2004 by researchers from the University of Lausanne, Switzerland. They compared 50 species and found no evidence that multiple mating by the queen correlated with red...

Transplanted brain cells hold promise for Parkinson's disease

...neural stem cell transplant essentially enables an animal model for Parkinson’s to continue functioning normally rather than displaying the progressive loss of movement control that characterizes the disease. "We are very cautious but to us, it’s an indication that stem cells have promise for Parkinson’s...

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