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Tag: "body" at biology news

Major gene study uncovers secrets of leukemia

...y rapidly and overwhelm the normal blood cells the body needs to survive. The St. Jude team used micro...to normally functioning lymphocytes. Normally, the body eliminates differentiated B lymphocytes that have failed to assemble the right genes to make effecti...

Penn researchers show how nanocylinders deliver medicine better than nanospheres

...ry of how to more effectively deliver drugs to the body could also improve the treatment of such other illnesses as cardiovascular disease as well as other types of cancers. This discovery is also helping scientists understand why some viruses are so effective. "Cylindrical delivery systems exist in n...

Scripps research study shows humans and plants share common regulatory pathway

...on with different multi-protein complexes. A large body of evidence also suggests that the protein plays a role in regulating pathogen resistance in plants. Various genetic studies have identified SGT1 as a crucial component for pathogen resistance in plants through regulation of expression and activities...

The penalty of having a sister -- why sibling sex matters for male saiga antelopes

...some mothers carrying young up to 38% of their own body weight. The research was carried out on populations of saiga antelopes living on the Eurasian steppe in the autonomous Republic of Kalmykia, Russia. Data from saiga antelope monitoring during Soviet times from the Betpak-dala saiga populat...

Nanotextured implant materials: blending in, not fighting back

...lastic, titanium, and ceramic substitutes ?but the body does not always accept such substitutes seamlessly... Webster. "We're trying to find materials that the body accepts, rather than develop drugs or develop materials that will kill a cell ?no matter if it kills...

Imaging pinpoints brain regions that 'see the future'

...r past experiences, including memories of specific body movements and visual perspective changes ?data stored as we navigated through similar settings in the past. These findings, McDermott suggests, offer strong support for a relatively recent theory of memory, which posits that remembering the past a...

New player in commitment to life as a fat cell

...signed to explore the effects of XOR inhibitors on body weight, and in light of our findings, such studies may be warranted," they added....

Tracking sperm whales and jumbo squid

...les were primarily preying on jumbo squid of large body size," the authors wrote. "Whales did occasionally dive beyond 500 meters, especially during daytime when the squid were deep, and we assume these also represent foraging dives." Night and day During the day, whales and squid spent about 75 p...

Discovery could lead to better control of hemorrhagic fever viruses

...studies have shown that when the iron level in the body is low, the number of transferrin receptors in tissues increases. Consistent with these findings, Choe's team found that New World arenaviruses infect cells more efficiently when iron levels are low, and that adding iron to cultured cells makes them ...

How appetite-stimulating brain cells work overtime during fasting

...ved is very similar to the one that regulates core body temperature in peripheral body tissues, Diano added. Thyroid hormones are known to play major roles during development as well a...

Scientists learn the origin of rogue B cells

...ople, the immune system turns against parts of the body it is designed to protect, leading to autoimmune d...ecognizes a component of one's own body. While the body has a built-in mechanism to correct these errant cells, the NIAMS researchers discovered this doesn'...

Female Antarctic seals give cold shoulder to local males

...o assess male genetic traits visually by examining body size and condition, dominant behaviours, or territory quality. Another possibility is that females can use smell to determine whether they are related to the male. Commenting on the practical implications for fur seal populations, Dr Hoffman said,...

Fighting influenza & co. with 40,000 blood samples

...diseases it has already been proven that the older body can no longer produce a sufficient amount of effec...e pathogen, the Epstein-Barr virus, remains in the body for life and could permanently weaken the body's immune system with increasing age, a theory which i...

Misusing vitamin to foil drug test may be toxic; plus, it doesn't work

...tely unfounded claim that it can rapidly clear the body of drugs such as cannabis and cocaine. However, ni... it is easily excreted from the body. However, the body has its limits, and some of these patients took 300 times the daily recommended dose of niacin." Dr....

Soft-cell approach cuts animal tests

...walls in organisms, and their reactions inside the body are relatively unknown. "These tiny new substa...depending on their site of action within the human body without using animals. For example, when assessing the toxicity of formaldehyde, which is known to h...

When your brain talks, your muscles don't always listen

...." Knight has always been interested in how the body adapts to exercise. When he entered college years ...w the site of injury," Knight said, "so their core body temperature can reach dangerous levels." In graduate school, he decided to pursue motor control r...

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

...cells instrumental in controlling and coordinating body movement and results in inexorable deterioration of the brain and spinal cord. Children suffering with Sandhoff rarely see their sixth birthday. Sandhoff mice are similarly affected. Tay-Sachs is predominant to Ashkenazi Jewish populations, while San...

Africa's first large-scale HIV vaccine study launches

...ce a cellular immune response to HIV and cause the body to make killer cells that are programmed to recognize and destroy cells that are infected with HIV. The studies already completed with this vaccine suggest that it is generally well tolerated and that the response of the immune system or immunogenici...

Cancer-killing invention also harvests stem cells

...o, in which case the device resides outside of the body ?either way, the device kills cancer cells and cap...-killing invention is to implant the device in the body before primary tumor surgery or chemotherapy. When doctors remove a primary tumor, the procedure it...

Antifungal drug kills TB bug

...s. "In humans, P450s oxygenate molecules in the body and are essential for steroid metabolism; they are also prevalent in the liver where they help us detoxify and dispose of countless chemicals and toxins that enter our system. Most bacteria have few, if any, P450s but we discovered that the TB bacter...

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