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Tag: "inside" at biology news

Hybrid molecule causes cancer cells to self-destruct

...s a cell's surface, then is split apart by enzymes inside the cell. Once inside the cell, ManNAc is processed into another sugar known as sialic acid that plays key roles in cancer...

Soft-cell approach cuts animal tests

...The cells are grown on a porous polyester membrane inside a small diffusion chamber and then exposed to sele...rough cell walls in organisms, and their reactions inside the body are relatively unknown. "These tiny new substances are the tip of a huge chemical icebe...

3 proteins may play important role in nerve-cell repair

...se in the level of an important signaling molecule inside the nerve cells called cAMP. This molecule plays a key role in regulating nerve-cell growth, differentiation and survival, and the regeneration of long parts of the cell called axons that carry the nerve impulses. Levels of cAMP drop in mammalian...

Anti-wrinkle compound causes pathological reaction in skin cells

... which act as reservoirs and interface between the inside and the outside of the cell. In the hours following the application of DMAE, the researchers observed an important slowing down of cell division—sometimes coming to a complete stop, the inhibition of certain metabolic reactions, and the death of a...

Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex

...n 2005 that they had found evidence of soft tissue inside the fossilized femur, a discovery widely covered. After seeing one such story in the New York Times, Cantley contacted Asara who, in 2002, had sequenced collagen fragments from 100,000- to 300,000-year-old mammoth bone samples sent by Schweitzer and ...

Bacteria control how infectious they become, study finds

...n, the process of transferring genetic information inside a cell and one of the first steps of gene expression. “Making RfaH work only at specific sites is, in a sense, a genius way to prevent it from interfering with NusG,?Artsimovitch said. “It seems that the only genes that RfaH can't regulate are tho...

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

...ts with the help of a bacterium which they harbour inside their intestine. The bacterium uses a protein (XptA1) a toxin which helps the nematode to kill and feed on the dead body of the insect. The toxin not only kills the target insect but prevents other predators from eating the body giving free reig...

Microbes start immune response by sneaking inside cells

...ts describe their findings that bacteria can barge inside these guard cells and independently initiate a pow... “In our study, the presence of bacterial microbes inside the cell is what triggers the immune response. That creates a new perspective for developing new dru...

Penn study on olfactory nerve cells shows why we smell better when we sniff

... olfactory epithelium, is a smell-sensitive tissue inside the nasal cavity. Synchronized Breathing The septal organ is only about 1 percent the size of the main olfactory epithelium and isn't shared by all mammals. Mice, for example, have a septal organ. Humans do not. But in this study, Ma's group ...

ATR checkpoint-activating DNA structure

...how checkpoint signals are generated and regulated inside the cell....

MU researcher placing eye implants in cats to help humans see

...moving the vitreous, which is the gelatinous fluid inside the back part of the eyeball, Narfstrom creates a small blister in the retina and a small opening, large enough for the microchip, which is just two millimeters in diameter and 23 micrometers (one-millionth of a meter) thick. The chip includes sev...

Scientists discover stage at which an embryonic cell is fated to become a stem cell

...nes that direct smaller daughter cells towards the inside of the embryo. These become the inner cell mass o...development with identical cells and only as these inside and outside cells form do differences between cells first emerge. However, research led by Profes...

Scientists sequence genome of parasite responsible for common sexually transmitted infection

... symptoms. Those that do may experience irritation inside the penis, mild discharge, or a slight burning sensation after urination or ejaculation. Symptoms in both men and women generally appear within five to 28 days of exposure to the parasite. Both men and women with trichomoniasis have an increased ...

Study to explore using magnets to correct 'sunken chest'

... one of the first times magnets have been embedded inside the body to treat a health condition, according to Michael Harrison, MD, professor of surgery and pediatrics emeritus at UCSF and lead investigator of the study. "We needed to apply a force to gradually remodel the chest wall without piercing the...

World's largest flower evolved from family of much tinier blooms

...aculty of Arts and Sciences. "As a parasite living inside the tissue of a tropical vine, the plant lacks leaves, shoots, or roots, making it difficult to compare to more conventional plants. Most efforts to place plants in the botanical tree of life in the past 25 years have tracked ancestry using molecular...

Hofmeyr skull supports the 'Out of Africa' theory

...t had been absorbed by sand grains that filled the inside of the skullâ?super>TM s braincase. At this age, the skull fills a significant void in the human fossil record of sub-Saharan Africa from the period between about 70,000 and 15,000 years ago. During this critical period, the archaeological tradit...

Study identifies risk factors for spread of respiratory infections in hospitals

... hospitals to increase the number of hospital beds inside a ward to meet the increasing demand, especially during an epidemic. When the distance between beds is reduced, exhaled droplets can spread from one patient to adjacent patients, spreading infection. Health care staff working while sick are an ob...

Illuminating the dark side of plants

...n to the toxic plants encountered everywhere, both inside and outside the home. This clearly structured and colorfully illustrated guidebook, co-published by The New York Botanical Garden Press and Springer, is an indispensable resource for hikers, gardeners, parents of small children, pet owners, physicia...

Carnegie Mellon University research shows how sensory-deprived brain compensates

... not only stimulate a predicted cluster of neurons inside the brain; it could also activate nearby neurons. While some degree of plasticity would be expected, the growth of brain activity seen in the experiments was striking, Barth says. "What this tells us is that the parts of the brain processing s...

Prenatal cocaine's lasting cellular effects

... showed the receptor was predominantly sequestered inside the cells. "The fascinating thing is that this effect appears permanent," said Stanwood. This implies that cocaine exposure during a brief, sensitive period of neural development can lead to long-lasting effects at the cellular level. This c...

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