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Tag: "body" at biology news

Secret of worm's poison pill box protein could produce new natural insecticide

...h helps the nematode to kill and feed on the dead body of the insect. The toxin not only kills the target...nsect but prevents other predators from eating the body giving free reign to the nematode worms to consume it, multiply and move on. However, until now, res...

Liver regeneration may be simpler than previously thought

... "The human liver is one of the few organs in the body that can regenerate from as little as 25 percent of its tissue," says Seth Karp, assistant professor of surgery at Harvard Medical School, Boston, and main author of the study. "It is not known how the liver does it, but our results provide some deta...

Microbes start immune response by sneaking inside cells

...tant new details to an emerging picture of how the body recognizes invading bacteria and responds. The wor... to attack pathogens and induces fever to help the body fend off infection. IL-1beta plays an important role, too, in excessive immune system activity in in...

Early-stage sperm cells created from human bone marrow

...lls have previously been found to grow into other body tissues such as muscle. They cultured these cells in the laboratory and coaxed them into becoming male reproductive cells, which are scientifically known as ‘germ cells? Genetic markers showed the presence of partly-developed sperm cells calle...

Antibody therapy prevents type 1 diabetes in mice

...pe 1 diabetes, an autoimmune disorder in which the body errantly attacks the insulin-producing cells of th...ght infections and other foreign substances in the body -- directed against a receptor known as CD137 on the surface of a type of immune cell called T-cells...

Childhood obesity among Quebec Cree raises concerns

...Montreal, Canada. The researchers measured height, body mass, waist circumference and skinfold thickness, and also assessed the children’s levels of physical activity and physical fitness. The results from one community, published in the International Journal of Circumpolar Health, indicated of the 82 par...

Why doesn't the immune system attack the small intestine?

...ial nutrients from food and drink and protects the body from invasive microbes, is literally teeming with bacteria, which help break down waste. The presence of so many bacteria is a potential trigger for an immune system response. Why do T cells almost always ignore the small intestine, leaving this vita...

Blame the brain for high blood pressure

...urgency of looking for new mechanisms by which the body controls blood pressure, and finding new therapeutic targets to drive fresh drug development. Professor Paton said: “We are looking at the possibility of treating those patients that fail to respond to conventional therapy for hypertension with dr...

Keeping the body in sync -- The stability of cellular clocks

...nstant light or darkness. Peripheral organs in the body have their own cellular clocks that are reset on a...rom these clocks are the daily rhythmic changes in body temperature, blood pressure, heart rate, concentrations of melatonin and glucocorticoids, urine prod...

Infection detectives use disease 'fingerprints' to track common infections in children

..., but also to understand the prognosis and how the body is responding to therapy," he said. Different v...n leukocytes, the white blood cells th at help the body fight infections. Researchers surmised that if they looked at the leukocytes, they could detect the ...

Scientists find new genes for Crohn's disease

...n the ATG16L1 gene leads to alterations in how the body uses autophagy and therefore may result in increased persistence of [toxic] cellular and bacterial components. This may lead to an inappropriate immune activation and increased risk of Crohn's disease," says co-author Dr. Ramnik Xavier, a gastroenter...

Putting an old drug to a new use

... but also too much iron is bad for our health. Our body stores excess iron in various tissues, where it ca...ential to treat similar conditions in humans. Our body needs most of its iron to make red blood cells. A lack of the metal can lead to dangerous anemias, b...

The price of vanity: Mating with showy males may reduce offspring's ability to fight off pathogens

...mounts of roe, and elevated testosterone increases body size. Thus, as Mank writes: "The benefits of increased body size to roe production and mate selection may, at least in some cases, counter the immunosuppressive...

New cell type identified in cancer development

...ion-induced cell death,?a protective mechanism the body may invoke to prevent pCSCs from maturing into full-blown cancer stem cells." It was a different story with the mice with impaired immune systems, however. In those animals, the pCSCs developed into solid tumors, developing additional mutations i...

Ebola outbreaks killing thousands of gorillas and chimpanzees

...e same fruit tree on a single day. Thus, infective body fluids deposited by one group might easily be encountered by a subsequent group. Chimpanzees and gorillas also fed simultaneously in the same fruit tree at least once every seven days. The study also provided the first evidence that gorillas from...

Scientists find potential 'off-switch' for HIV virus

...he cell in the process. Without these T cells, the body loses its ability to repel other infectious bacteria and viruses, and eventually dies from assaults from these other "opportunistic" infectious invaders. On rare occasions, however, a virus will infect the T cell and become dormant. Why this indi...

Tracing broken wiring in stroke patients

...a lack of awareness or response to the side of the body opposite to the side of the stroke lesion in the brain. The researchers said their findings shed new light on the neurological details of this "spatial neglect." Their findings also demonstrate the value of the magnetic resonance imaging (MRI) techni...

Massey researchers induce cell death in leukemia

...e findings of our study -- as well as the emerging body of preclinical and early clinical data suggesting interactions between HDAC inhibitors and bortezomib in other tumor cell types, particularly hematologic malignancies -- is certainly of interest and warrants further investigation as a potential thera...

Study to explore using magnets to correct 'sunken chest'

... first times magnets have been embedded inside the body to treat a health condition, according to Michael ...been found to have no effect on the heart or other body parts, and studies have demonstrated that long-term exposure to magnetic fields is not harmful. S...

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

... with the condition generally show changes in core body temperatures and other characteristics governed by the circadian clock that are shifted up by three to four hours. The syndrome is passed on in a dominant fashion, meaning that it takes just one copy of the abnormal gene to exhibit symptoms. The UC...

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