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Tag: "escape" at biology news

Analysis of breast-cancer gene role offers promising target

...nes to break down and allowing the cancer cells to escape into the bloodstream and to adjacent tissues. The result is metastasizing breast cancer. About 20 percent to 25 percent of breast-cancer patients were shown to have uPAR gene amplification, which means they carry too many copies of the gene. "The ...

Cell wall of pneumonia bacteria can cause brain and heart damage

...d that pieces of cell wall from S. pneumoniae that escape from the bloodstream enter neurons (brain cells). ...the researchers showed how the cell wall fragments escape the bloodstream and enter cells. Specifically, they demonstrated that pieces of the bacterial cell w...

Complexity constrains evolution of human brain genes

...ecies with smaller population size can more easily escape the harsh scrutiny of natural selection. When they compared the pace of evolution among genes expressed in the brain, however, the order was reversed. When calibrated against the genomic average, brain genes in humans evolved more slowly than in o...

Radiologists attempt to solve mystery of Tut's demise

...ges," Dr. Selim said. Dr. Selim's team did not escape the so-called curse that is said to plague anyone who disrupts the remains of the boy king. "While performing the CT scan of King Tut, we had several strange occurrences," he said. "The electricity suddenly went out, the CT scanner could not be st...

Researchers map spread of pathogens in the human body

...t individual bacteria and their progenies cleverly escape from host cells and distribute to new sites of the body, continuously staying one step ahead of the immune response. The type of spread varies between different bacteria, thus posing challenges for the rational treatment or prevention of these infect...

Malaria vaccine prompts victims' immune system to eliminate parasite from mosquitoes

...r produced limited immunity. The Plasmodium cells escape the human immune system by hiding in liver and blood cells, making them difficult to target with a vaccine. During the human phase of the infection, these cells, for the most part, exist in an asexual form. Some of the Plasmodium cells, however,...

Too mellow for our predatory world

...crease, which limits their ability to successfully escape from newly introduced predators (Proceedings of th...to fly. This would greatly reduce their ability to escape should new predators appear. In contrast to such "hard wired" traits, however, behavioural patterns ...

HIV exploits competition among T-cells

... human immune system's T cells allows the virus to escape destruction and eventually develop into full-blown...se, a small amount of virus mutates fast enough to escape initial detection and continues to mutate over time. The third phase, AIDS, occurs when the virus ha...

Fishy cooperation

...er hunts in open waters around the reef. Prey can escape from the grouper by hiding in a crevice and from the moray eel by leaving the reef, but prey has nowhere to go if hunted by a combination of these two predators. The article offers a description and accompanying videos, such as the one showing a grou...

Cities change the songs of birds

... these capacities may have no other choice than to escape city life. ...

Researchers show that veins stiffen as we age

...nute period, and then slowly deflated to let blood escape from the limbs, the blood volume was measured, recorded, and graphed. The consistently lower blood volume under pressure pointed to the less springy veins of the older participants. Graphic courtesy of the American Medical Association " Based on p...

The great escape -- fleeing fish fall in line

...uring a predator attack it is a case that all fish escape at once in the desperate hurry to escape as quickly as possible. However, new research indicates that this is not the case, and in fact fish...

Vaccine to cope with viral diversity in HIV

...vels of genetic diversity and acquire mutations to escape immune pressures contributes to our difficulties in producing a vaccine. David Nickle et al present here an efficient algorithm to develop vaccines that cope with the diversity of HIV or other variable pathogens. This computational method clarifies ...

Light-based probe 'sees' early cancers in first tests on human tissue

...e, making it less likely for a cancerous lesion to escape detection. Wax and his former graduate student John Pyhtila reported in the March 2007 issue of Gastrointestinal Endoscopy that their fiber-optic device reliably differentiated between healthy and precancerous digestive tissue taken from the stoma...

A case of mistaken identity for the ivory-billed woodpecker?

...its wings did reach 8.6 beats per second during an escape flight. He also found that as Pileated Woodpeckers fly away from the camera, their plumage is hard to distinguish from the Ivory-billed Woodpecker's. He suggests that the Pileated Woodpecker's distinctive black trailing wing edges can be spotted in t...

Scientists find potential 'off-switch' for HIV virus

...ctious virus in a victim's body, some viruses will escape because they have hidden by going dormant. Eventually, these dormant viruses wake up and the infection returns, so it makes sense to try to keep the virus asleep if possible." HIV weakens the body's immune system by invading CD4+ T cells, which in...

Mechanisms involved with tumor relapse identified

...of HER-2/neu is a mechanism that tumors utilize to escape the immune-mediated destruction," he said. Since 2000, Manjili and his colleagues have been employing animal models of breast cancer to evaluate anti-tumor efficacy of a vaccine formulation they created. This vaccine formulation combines a heat sh...

A genetic 'gang of 4' drives spread of breast cancer

...ong the four genes also enables cancerous cells to escape into the bloodstream and penetrate through blood v...essels that did form allowed fewer cancer cells to escape into circulation. The researchers next explored how loss of the four abnormal genes affected the m...

Tracking sperm whales and jumbo squid

...time, or at night after it has made a deep dive to escape the warm, stressful conditions at the surface. "By hunting deep in this cold, hypoxic environment at night, as well as during the day, sperm whales may favor jumbo squid that are in some way compromised and thus easier to capture," the authors wro...

The quest for an effective HIV vaccine presents new possibilities, challenges

...s outer envelope protein, which allow the virus to escape detection. While early efforts to develop an HIV vaccine focused on the viral envelope, an improved understanding of how HIV causes disease has brought increased attention to the role that T cells could play in an HIV vaccine by spurring cellular...

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