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Tag: "human" at biology news

Woman's Day and For Womens of Science

...conomic and health effects of mercury pollution on human populations, and its effects on the world's fisher... the mercury in Earth's atmosphere attributable to human activities today. Little is known about the behavior of mercury in marine ecosystems and methylmer...

Mercury contamination of fish warrants worldwide public warning

...conomic and health effects of mercury pollution on human populations, and its effects on the world's fisher... the mercury in Earth's atmosphere attributable to human activities today. Little is known about the behavior of mercury in marine ecosystems and methylmer...

Bypassing eggs, flu vaccine grown in insect cells shows promise

...?is a growing business. A similar technology using human cell lines is used to produce the hepatitis B vaccine, while one form of a vaccine against human papilloma virus is made using the same insect cell line used in the JAMA study. In the study cond...

Enhancing activity of marijuana-like chemicals in brain helps treat

...mics dopamine, in mice with a condition similar to human Parkinson's disease, resulting in a small improvement in the mice. "That was sort of expected," said Malenka. "The cool new finding came when we thought to use drugs that boost the activity of endocannabinoids." Based on prior knowledge of endo...

Prehistoric origins of stomach ulcers uncovered

...ost painful stomach ulcers has been present in the human digestive system since modern man migrated from Af...s. They found that the genetic differences between human populations that arose as they dispersed from Eastern Africa over thousands of years are mirrored in...

Scientists learn the origin of rogue B cells

...sing a technique in which they inserted a piece of human gene into the cells of laboratory mice, the researchers created a model for visualizing the process in live animals. "Most of what scientists do is to create systems to visualize complex phenomena, then to allow nature to give you the answers to your...

Mimicking how the brain recognizes street scenes

...retina. "And once you have a good model of how the human brain works," Serre explained, "you can break it to mimic a brain disorder." One brain disorder that involves distortions in visual perception is schizophrenia, but nobody understands the neurobiological basis for those distortions. "The versatil...

Bacterial walls come tumbling down

...hers focused on Staphylococcus aureus, a notorious human pathogen. An epidemic strain of the bacteria known...me." Although moenomycin is poorly absorbed by the human body, the new understanding of exactly how it interferes with bacterial enzyme function should help ...

NIAID DNA vaccine for H5N1 avian influenza enters human trial

The first human trial of a DNA vaccine designed to prevent H5N1 av... material. Once inside the body, the DNA instructs human cells to make proteins that act as a vaccine against the virus. VRC Director Gary Nabel, M.D., P...

Soft-cell approach cuts animal tests

... Shahnaz Bakand and Chris Winder, directly exposes human cells to airborne toxicants and measures cytotoxic...Little is known about their toxicity and safety to human health but this new category of pollutants poses possible dangers, both medically and environmentall...

Hotspots of mercury contamination identified in eastern North America

...ations of the element exceed those established for human or wildlife health. The team focused on levels of the potent neurotoxin in yellow perch and common loons, but it also took into account contamination in other fish, birds, and mammals. In addition to these hotspots in New England, New York, and Nova ...

Genes set scene for metastasis

...MSKCC) have identified a set of genes expressed in human breast cancer cells that work together to remodel ...MP1 and MMP2 (matrix enzymes that are expressed in human breast cancer cells). The researchers conclude that drug combinations that target one or more of...

Lithium builds gray matter in bipolar brains, UCLA study shows

...hat may be affected by lithium treatment in living human subjects, said Bearden. "We used a novel method for brain imaging analysis that is exquisitely sensitive to subtle differences in brain structure," she said. "This type of imaging has not been used before to study bipolar patients. We also reveal...

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

...lls, they extended those insights to stem cells of human origin, both human neural stem cells and human embryonic stem cells, and, in fact, had the opportunity, for the first t...

Synthetic peptide targets latent papilloma virus infections

...ly marketed vaccine promises to drastically reduce human papilloma virus (HPV) infections, the major cause ...k generally for many different genetic variants of human papilloma virus, though it's too early to say how many of the genotypes of this virus will respond,"...

Massive coral death attributed to earthquake

...ll reef damage should be immediately attributed to human influences." Many other reefs, particularly in the Pulau Banyak, continue to be damaged by destructive fishing including bombing and the use of cyanide. These practices are now illegal in Indonesia, and need immediate attention. Dr Campbell con...

Scientists find hormone activity explains adolescent mood swings

...hers used a mouse model that reliably predicts the human condition. In this rodent model, the alpha4-beta2-... Dr. Smith and colleagues identified the site on human recombinant alpha4-beta2-delta GABA-A receptors that produced the anxiety response, and were able to...

Common gene version optimizes thinking -- but with a possible downside

...t study to explore the effects of variation in the human gene for a brain master switch, DARPP-32. The re...shapes and controls a circuit coursing between the human striatum and prefrontal cortex that affects key brain functions implicated in schizophrenia, such as...

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

Studies of human tumor cells implanted in mice have shown that the ...nd that they could reduce the growth and spread of human breast tumors in mice by simultaneously targeting two of the proteins produced by these genes, using...

New study challenges 'critical period' in childhood vision development

Understanding how the human brain learns to perceive objects is one of the ultimate challenges in neuroscience. In 2003, Pawan Sinha, a professor at the Massachusetts Institute of Technology, launched an initiative with the hopes of shedding some light on the acquisition of vi...

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