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Found results: 3396

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Not every beta-amyloid is bad

With the introduction of insoluble, as well as soluble one- and three-molecular forms of beta-amyloid, no recorded effects were observed. However, the introduction of a two-molecular soluble beta-amyloid caused the development of symptoms characteristic of Alzheimer's disease in rats.

24.06.2008
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Two new ways to fight atherosclerosis

Harvard researchers have deciphered the mechanisms underlying the fact that the ROCK1 protein significantly suppresses inflammation of the vascular walls in atherosclerosis, which is the main cause of heart attacks and strokes. The authors found that ROCK1 is necessary for immune cells – macrophages – to clean the walls of blood vessels from fat deposits. A normal side effect of such cleansing is inflammation, but often this process gets out of control, which causes the opposite result - the growth of atherosclerotic plaques and blockage of arteries.

24.06.2008
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The virus is half a meter in diameter

The exact model of the African catarrhal fever virus exceeds the size of the original by more than five million times. It will help veterinarians develop more effective drugs to combat the spread of infection.

24.06.2008
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A surgeon from the Guinness Book of Records

On June 22, 2008, surgeon Fyodor Uglov died in St. Petersburg at the 104th year of his life. He got into the Guinness Book of Records as the world's oldest practicing surgeon.

24.06.2008
News

A healthy lifestyle protects against cancer by changing the activity of genes

A healthy lifestyle significantly changes the expression of hundreds of genes. The activity of a large number of genes, including several involved in the formation of tumors, decreases, while the work of other genes, including several involved in the fight against various diseases, is noticeably activated.

24.06.2008
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Hormone therapy in menopause: good or bad?

The changes occurring with the vessels during menopause are very complex and multifaceted, and the authors emphasize that the currently available knowledge is insufficient to determine the best method of hormone replacement therapy.

24.06.2008
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Testosterone prolongs life

Compared with high testosterone levels, low levels of this hormone increase the risk of death (from any cause) by 2.5 times during the next 10 years of life.

24.06.2008
News

Stem Fake

Operatives of the Ministry of Internal Affairs of the Russian Federation are investigating a criminal case of fraud with the production and sale of the drug "Stemamine" in Russia, allegedly containing stem cells.

24.06.2008
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Opiates and cannabinoids affect sperm motility

Using a set of techniques, the authors found three types of opiate receptors (delta, kappa and mu) and two types of cannabinoid receptors (CB1 and CB2) on the surface of human spermatozoa. Moreover, receptors of all types are found on the head, middle part and tail of spermatozoa.

23.06.2008
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Too much fat is bad for memory

Assuming that the revealed relationship extends to humans, the results of this work are another argument in favor of limiting the use of cholesterol and saturated fats.

20.06.2008
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Inoperable melanoma was cured by the patient's own immune cells

American scientists have managed to completely cure a patient with inoperable metastasized melanoma with the help of his own immune cells. During two years of follow-up after therapy, the 55-year-old man did not show any signs of a tumor.

20.06.2008
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Nanomagnetic genes

Using the gene of a magnetic field-sensitive bacterium, Emory University scientists have created genetically modified mammalian cells capable of synthesizing magnetic nanoparticles.

19.06.2008
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No male can resist superpheromones

The detected pheromones activate specialized olfactory cells 30 times more strongly than all previously known urine pheromones of female mice combined. In addition, some of the new compounds selectively activate individual cells. This means that the male brain can evaluate various aspects of female health through selective analysis of individual pheromones.

19.06.2008
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Cancer cells: find and neutralize!

Researchers from Seoul National University have developed a method of cancer gene therapy by introducing a gene into tumor cells, the protein product of which tracks and destroys cancer cells, increasing the ability of the cell membrane to absorb iodine and its radioactive isotope. To improve the visualization of cancer cells, a reporter gene was also introduced, triggering the synthesis of a fluorescent protein during the expression of a therapeutic gene.

19.06.2008
News

Double blow to the tumor

Scientists at the University of Missouri have developed a new non-toxic treatment method that effectively destroys breast cancer cells. The method consists in the introduction of a combination of a compound with a small molecular weight acting on tumor cells and an antibody selectively blocking the blood vessels of the tumor.

19.06.2008
News

Another mechanism of alcoholic brain damage

In chronic alcoholism, regions of the brain that are sensitive to the toxic effects of alcohol are characterized by pronounced resistance to insulin and insulin-like growth factor. The resistance of the frontal lobe and cerebellum regions to these hormones was accompanied by the destruction of cells and intercellular contacts, as well as a decrease in the levels of neurotransmitters necessary for learning, memorization and motor function.

18.06.2008
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Antibody-coated nanotubes will "fry" the tumor

When the lymphoma cells were introduced into the culture, the nanotubes coated with antibodies bound to the cell surface, and the subsequent exposure to near-infrared light caused them to warm up to a temperature sufficient to destroy the cells.

18.06.2008
News

Rejuvenation Recipe: More Notch and Less TGF-beta

Notch and TGF-beta regulate the activity of stem cells and other organs, including the brain, so the proposed approach can theoretically be used, if not for rejuvenation of the whole body, then at least for the restoration of physical damage to soft tissues and elimination of the consequences of stroke.

18.06.2008