Tag: "killer" at biology news
Devices tease out individual sounds from underwater racket
...oise, Nystuen has found. It's also heavily used by killer
whales. "If the food is there, do the orcas care?" he asks. "That's one for the biologists to determine."...
Hopes raised for effectiveness of multiple sclerosis drug
...umber of immune cells known as "regulatory natural killer
cells," which are very rare in normal human blood, increased. Regulatory natural killer
cells are known to proliferate in special conditions, such as pregnancy or bone marrow transplantati...
Tiny water purification packet helps save lives worldwide
...atically reduce pathogen-induced diarrhea the top killer
of children in much of the developing world. The packets also show promise for boosting water safety during emergencies and natural disasters, such as earthquakes, floods and hurricanes, where water purity is suddenly compromised, the researchers sa...
Front-line immune cells mature in four stages, study shows
... immune cells. The researchers found that natural killer
(NK) cells, one of the body's front-line defenses against cancer and infections, mature from progenitor stem cells in four discrete stages. They also found that this happens in secondary lymphoid tissue such as tonsils and lymph glands. Key discover...
Mouse study reveals human X-SCID gene therapy poses substantial cancer risk
...tem cells, including T cells, B cells, and natural killer
cells. These immune system cells that kill invading viruses and bacteria, produce antibodies as well as help regulate the entire immune system. Without the common gamma chain, these cells cannot develop normally, and are unable to protect the body. R...
Knowledge of dendritic cells branches out
...drites" of the DC to activate the immune system's killer
T cells. These activated T cells then eliminate the existing infection and resist any future attack by memorizing that infection. DC also have an important educative role to play in preventing autoimmune diseases, such as type 1 diabetes and Multipl...
White blood cells from cancer-resistant mice cure cancers in ordinary mice
...he transplanted white blood cells included natural killer
cells, and other white blood cells called neutroph...olleagues also showed that highly purified natural killer
cells, macrophages and neutrophils taken from the cancer-resistant mice killed many different types ...
Whale bubble nets, saxophone sounds, ultrasonic laser
...water tail slaps that stun herring prey. Icelandic killer
whales employ an additional tactic, as discovered ...rey capture, but conveniently falls outside of the killer
whale's own hearing range (4aAO2). In the Gulf of Alaska, humpback whales work in groups to capture...
Colombian frog believed extinct found alive
...pecies of Harlequin frog believed extinct due to a killer
fungus wiping out amphibian populations in Central and South America. The discovery of what could be the last population of the painted frog (Atelopus ebenoides marinkellei) indicates the species has survived the fungus, providing hope that other spe...
Research reveals control of potent immune regulator
...d interferon gamma (IFNg) is controlled in natural killer
(NK) cells, immune cells that typically defend the body against cancer and infections. IFNg, produced by NK cells and other cell types, plays a critical role in killing pathogen-infected cells and in defending against tumor cells. However, overprodu...
Natural born killers
...lecular signals that trigger maturation of natural killer
cells, an important group of immune system cells, ... issue of Nature Immunology. Born to kill, natural killer
cells are constantly on the prowl for potentially dangerous invaders, ready to unleash their deadly ...
JCI table of contents: June 22, 2006
...blishes infection in B cells, macrophages, natural killer
cells, and dendritic cells in these animals. Importantly, viral growth was dramatically inhibited by administration of the antiviral drug ganciclovir. This mouse model promises to be a powerful tool to study the pathogenesis of KSHV, including the ro...
Epilepsy drug eases symptoms of inherited disorder that weakens muscles
...and reduce incidence of pneumonia, the most common killer
of patients with SMA III and IV. Valproate's side effects can include weight gain, hair loss and acne. One patient stopped taking the drug because she was concerned about weight gain. "Adding weight can be a problem in patients who are already weak, ...
American Chemical Society national meeting: San Francisco, Sept. 10-14
... The latest progress in finding new biomarkers for killer
diseases New protein-based drugs and delivery of genes for gene therapy ...
Boosting killer cells might improve breast-cancer drug
...er-killing activity of immune cells called natural killer
(NK) cells, which attack the tumor. The findings by researchers at the Ohio State University Comprehensive Cancer Center Arthur G. James Cancer Hospital and Richard J. Solove Research Institute are published in the July 1 issue of The Journal of ...
Honey helps problem wounds
...to side-effects among children.'Effective bacteria killer
It has already been proved that medihoney even puts paid to multi-resistant germs such as MRSA. In this respect medihoney is neck and neck in the race to beat the antibiotic mupirocin, currently the local MRSA antibiotic of choice. This is shown by ...
Mosquito spray increases toxicity of pyrethroids in creek, study finds
... in California, ranging from cans of household bug killer
to commercial pest control sprays. Prior studies by Weston and colleagues have shown that pyrethroids exist in agricultural and urban streams at levels toxic to sensitive aquatic life. General urban pesticide use, such as applying insecticides on l...
Study shows how protein raises antibody output
...e against bacteria that cause pneumonia, a leading killer
of people with weakened immunity such as cancer and HIV/AIDS, and of controlling autoimmune diseases. "Our findings describe a previously unknown signaling pathway in B cells that helps regulate antibody production," says principal investigator Vi...
How HIV 'exhausts' killer T cells
... the human immunodeficiency virus (HIV) "exhausts" killer
T cells that would otherwise attack the virus. The...scientists showed that they could reinvigorate the killer
T cells by blocking that inhibitory switch, which is called programmed death-1 (PD-1). The study...
LIAI scientists identify immune system trigger for fighting Lyme disease
...riggers an immune response from the body's natural killer
(NK) T cells, a type of white blood cell. The fin...al Nature Immunology in a paper entitled, "Natural killer
T cells recognize diacylglycerol antigens from pathogenic bacteria." This was the second major fi...
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