Tag: "metabolism" at biology news

Friendly microbes control intestinal genes, study finds

...ted several mouse genes involved in absorption and metabolism of sugars and fats. It also activated genes that control the integrity of the cellular barrier that lines the intestine and separates us from dangerous organisms and ingested substances. Other genes affected by the bacterium regulate how potentially ...

Rat study shows high-fat diet impairs concentration and memory

...ially energy -- in order to function. When glucose metabolism is impeded by saturated fatty acids, it's like clogging the brain and starving it of energy," says Dr. Carol Greenwood, a professor in the Department of Nutritional Sciences at the University of Toronto and scientist at Baycrest Centre's Kunin-Lunenf...

Fetal and prepubertal growth both programme cholesterol metabolism in adulthood

Birthweight, subsequent growth, and cholesterol metabolism in children 8-12 years old born preterm 2001;84: 212-17 The body's ability to process cholesterol as an adult is likely to be programmed by size at birth, shows research in Archives of Disease in Childhood. But just as important are the years betwe...

Scientists find great-granddaddy of enzyme family

...rocess, with one organism carrying out part of the metabolism and a second organism doing another part, illustrates how early bacteria may have evolved together to undertake complex tasks. "This particular protein is an excellent model of very early cooperation between bacteria," Sanders says. "And that coopera...

More light makes redfish grown faster

...emical, thyroxine, which regulates fish growth and metabolism - the way fish receive and use energy. "Although we still do not know exactly how the thyroid regulates fish growth, the work we have done indicates that animals that are happy and healthy and are growing very actively have very high thyroid hormone ...

Alcohol, sucrose and genetics influence cardiovascular risk

...ms whereby E2 and E4 alleles cause different lipid metabolism responses to nutrients. He suggests that, in such complex research, it is important to keep in mind that multiple comparisons of genotypes and different nutrients, as well as a low frequency of some genotypes, call for additional verifications of ind...

Common genetic differences affect vulnerability to childhood leukemia, new study shows

... scrutiny of the role of folic acid and folic acid metabolism in causing childhood leukemia. "Future studies may suggest methods to exploit folic acid biochemical pathways to treat leukemia," he suggested....

UCSD researchers create a home for liver cells on a silicon chip

...d then eliminated from the body. In general, the metabolism of a drug by the liver will dictate its clinical value. Bhatia says that by introducing various drugs onto the bioreactor, she can test how the substances are detoxified by the liver cells without the need for whole body animal experiments. She can ...

A stomach enzyme deficit may place women at more risk from drinking alcohol

...er blood alcohol levels than men do. The stomach's metabolism of alcohol may be a link between women's greater r...e stomach before it enters the blood stream. This metabolism of alcohol is due to the activity of gastric alcohol dehydrogenase (ADH) isozymes. The stomach's me...

Activity decrease in exercising older adults linked to decline in resting metabolism

...activity showed significant drops in their resting metabolism in less than a week, even though they had reduced their caloric intake accordingly. Such a metabolic slowdown can set the stage for weight gain and associated problems like increased risks for cardiovascular disease and other metabolic diseases like...

Lipoprotein lipase: Location, location, location.

...f the released protein is inactive, so lipoprotein metabolism begins in the bloodstream of transgenic mice. The generation of fatty acids within the circulation, rather than in the muscle and other tissues, profoundly alter the blood lipid profile of LpL transgenic mice, even those that also carry the normal g...

Making you fat - when you need it

...y can be used elsewhere. When normal hepatic lipid metabolism is disrupted, it can lead to diseases such as atherosclerosis and developmental brain defects. Some of the steps controlling how lipids are made within a cell are known. A set of factors called SREBPs (for sterol regulatory element binding proteins...

When Shewanella meets goethite: Evidence found of recognition between animate and inanimate objects

...ransfer reactions. Also, Shewanella can couple the metabolism (i.e., breakdown) of organic contaminants, many of which are found in oxygen-poor environments, to their electron transfer process. By giving Shewanella minerals, such as like goethite, to live and breath in oxygen-poor environments, we may be able t...

Genetic deficiency may explain sudden infant death syndrome

...g energy for skeletal muscle and the heart and for metabolism in the liver, according to Jamal A. Ibdah, M.D., P...) at Wake Forest. The energy ordinarily comes from metabolism of fatty acids. Ibdah set out to demonstrate effects in mice by "knocking out" the gene that prod...

Resistance training complements aerobic exercise for women

...burn more calories during the workout but increase metabolism for less than an hour afterward. Results were publ...tance training could have a more lasting effect on metabolism than aerobic exercise. It burns fat and increases muscle mass." Researchers followed a dozen women ...

Chemists characterize regulators of zinc intake and export in cells

... improve our knowledge of diseases related to zinc metabolism as well as influence future drug design and pharma...teria E. coli, which provides a good model of zinc metabolism in animal cells. They found that when the amount of zinc in the cell increases to a point where zinc...

'Grow-in-the-dark' algae may promise dietary supplements, glowing pigments, and more, say Science authors

...rch "demonstrates that a fundamental change in the metabolism of an organism can be accomplished through the introduction of a single gene." They acknowledge, however, that a one-gene solution will probably be the exception and not the rule for future metabolic engineering projects. In the case of P. tricornut...

Exercise effects dependent on time of day

...that the response of the systems regulating energy metabolism and some hormones differs according to when in the...strong evidence for substantial changes in glucose metabolism and an array of hormonal responses to 1-hour, high-intensity exercise, dependent on the timing of th...

Acute zinc depletion affects homeostasis by reducing the rate of release from skeletal muscle

...on. The authors used a compartmental model of zinc metabolism to explain the marked decrease in plasma zinc mass that could not be accounted for by zinc excretion. They concluded that zinc depletion was due to a 60% reduction in the rate of zinc release into the plasma from the most slowly turning over zinc poo...

Walnut consumption may reduce heart disease risk by beneficially redistributing cholesterol

...alnuts is favorable, and that walnuts affect lipid metabolism differently than other food sources of n-3 and n-6 fatty acids, such as fish oil and soybean products....

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