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Found results: 3396

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Choose: stress and depression or gluttony and obesity?

Researchers have shown in experiments on mice that chronic stress leads to an increase in the concentration of ghrelin in the body. At the same time, the manifestations of depression and anxiety decrease, but a side effect of this beneficial property is increased food intake in experimental animals and, as a result, inevitable obesity.

18.06.2008
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DNA and the brain (In search of genes for mental illness)

One of the hottest areas of research today is genetics in psychiatry. James Watson, who will come to Moscow at the invitation of the Russian Academy of Sciences, will tell about how DNA works in the holy of holies of our body – in the brain, how genes affect the formation of schizophrenia, autism and other mental disorders.

18.06.2008
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Unique video recording: ovulation close-up

The process of egg release from the mature follicle was recorded by an endoscope camera inserted into the pelvic cavity of the patient. The video shows how a reddish protrusion appears in the hole formed by the action of enzymes in the wall of the follicle, and from it – an egg, which is sent to the fallopian tube.

17.06.2008
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Pregnant and lactating women should refrain from eating too fatty foods

The authors fed rats with fat-rich food during pregnancy and lactation. The control group received the usual balanced feed. After stopping feeding with mother's milk, the cubs began to be given regular or fat-rich food. The time of puberty was recorded by traditional methods. In addition, the amount of fat in the body and the levels of sex hormones in the blood were evaluated in mature animals.

17.06.2008
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Melanopsin will help to adjust the biological clock

The researchers created genetically modified mice with melanopsin-expressing cells sensitive to diphtheria toxin. Treatment of the retina of 8-week-old mice with this toxin did not affect their visual abilities at all, but completely deprived the biological clock of the animals of sensitivity to light.

17.06.2008
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Tumors are provocateurs

The authors injected "provoking" human breast cancer tumor cells into animals simultaneously with passive "reacting" cells of human origin. Such passive cells formed extremely rapidly growing tumors, but only in the presence of provoking malignant cells.

16.06.2008
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microRNA-155 and B-lymphocytes: mutate, but in moderation!

By controlling the level of the AID enzyme, microRNA-155 regulates the fight of the immune system against microbes, while preventing the formation of very aggressive malignant diseases: leukemia and B-cell lymphomas.

16.06.2008
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A vegan should be in jail!

A 12-year-old Scottish woman, put on a strict vegetarian diet by her parents, was hospitalized with a severe bone development disorder. Her spine is similar to the spine of an 80-year-old old woman. This is not the first case. For example, last year in the United States, a vegetarian couple was sentenced to life imprisonment for bringing their six-week-old child to starvation.

11.06.2008
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How to monitor the immune system

Scientists at the University of California have developed a contrast agent for positron emission tomography, which allows in vivo monitoring of the immune response during the development of many diseases.

11.06.2008
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Brain helps fight Cancer

Beta-endorphin-producing neurons not only improve a person's morale, but also play a role in regulating stress reactions and immune functions that provide control over the formation and progression of tumors.

10.06.2008
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DLC1 is another anti–oncogene

Tumor suppressor genes, or anti-oncogenes, perform important functions in the work of intercellular interaction systems that prevent uncontrolled cell growth and proliferation.

10.06.2008
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Sugar substitutes? You can't fool the brain!

Despite the fact that sugar and sweeteners initiate the same taste recognition mechanisms (people are not able to distinguish their solutions by taste), sugar activates the brain regions associated with the formation of a sense of pleasure more strongly.

09.06.2008