Tag: "multiply" at biology news

Pathogenic yeasts and fungi: A growing health concern

... filamentous row of cells. Like other yeasts, they multiply through cell division, or grow as filaments. It is this filamentation that enables Candida's cell walls to bind to the respiratory tract. "This ability to exist in two different forms give fungi a real advantage and flexibility to deal with immune sy...

Cadmium studies suggest new pathway to human cancer

...e corrective mechanisms, mutations would occur and multiply in cell after cell, which could lead to cancer, reproductive problems, birth defects or other ills. "What we have shown," Dr. Gordenin continued, "is that environmental factors such as cadmium can cause high levels of mutations not only by dam...

West Nile virus warning system from climate data

...ct the virus into humans and animals, where it can multiply and sometimes cause illness. It is outdoor temperatures that determine both the rate at which the virus replicates and the rate at which mosquitoes age. While mosquitoes can live as long as three or four months in a laboratory, their life span in th...

Scientists identify genetic link between cancer and aging

...haracteristic ability of tumor cells in culture to multiply indefinitely and thus to exhibit permanent youth. Our results are consistent with the hypothesis that genetic programs that limit organismal aging may, at the cellular level, promote tumor development, thus constituting a double sword. On the posit...

Public Library of Science acts to increase public access to scientific research

...quation that drives the Public Library of Science multiply knowledge by access and you can really accelerate progress." In addition to the television commercial, an extensive grassroots campaign is under way utilizing PLoS's 33,000 supporters at institutions worldwide to raise awareness of PLoS among the sci...

Wildlife markets and disease transmission

...thogens creates optimal conditions for diseases to multiply rapidly and jump between species to exploit new potential hosts -- something the most "successful" diseases do all too well.Under this scenario, two problems are created. First is the high risk of new diseases spreading into human populations. Second...

University of Rochester scientists test new method to attack cancer

...usual 50 to 100. Over time, a few cancer cells can multiply into a golf-ball-sized tumor or spread to other parts of the body. Since researchers discovered the important role telomerase plays in most cancers in the mid-1990s, much attention has been focused on finding a way to attack them. Several methods are...

Dual action anthrax vaccine more effective

...bodies in those individuals to combat bacilli that multiply in victims long after antibiotic treatment has ended. To make the vaccine, the scientists chemically joined two anthrax molecules that are the bacterium's major virulence factors in disease, but in a vaccine act as antigens, stimulating an infected p...

How tea works against skin cancer

...may "order" cells to divide and multiply. If cells multiply too long or too fast, the result is cancer. UV light can activate such a pathway in the skin. Work led by Allan Conney of Rutgers has already shown that caffeine, a well-known component of tea, blocks ultraviolet light-induced carcinogenesis, said Do...

Genetic clues may show which women face breast cancer risk from HRT

...cation. Researchers believe the more breast cells multiply over a lifetime, the greater the breast cancer risk. The estrogen and progesterone naturally present in young women cause breast cells to multiply, but as a woman enters menopause, hormone levels plummet and breast cell multiplication slows. Hormone ...

Setting the evolutionary record straight

...le to perish", whereas the best adapted survive to multiply the race. Thereby species would be continually adapting to local conditions, and also able to meet the demands of a changing environment."Although he never used the term, Hutton clearly articulated the principle of evolution by natural selection," sa...

Bad Mileage: 98 tons of plants per gallon

...in ancient plant material actually ends up as oil, multiply 4.14 kilograms by 10,750 to get roughly 44,500 kilograms of carbon in ancient plant matter to make a gallon of gas. About half of plant matter is carbon, so double the 44,500 kilograms to get 89,000 kilograms or 89 metric tons of ancient plant ma...

It's feast or famine: Predators may drive lemming cycles, Science researchers say

... plentiful prey or left the area, the lemmings can multiply fast enough to reach their peak once again. To test their hypothesis, the researchers constructed a numerical model that incorporated many aspects of each species' population dynamics, such as how fast the animals reproduce, how long they live and ho...

Growth hormone activates gene involved in healing damaged tissue

...tivity found in old age, and liver cells failed to multiply rapidly enough for a quick recovery. Further tests were done with genetically engineered mice in whose liver cells the Foxm1b gene had been disabled. In these mice, growth hormone injections failed to stimulate recovery when the liver was partially ...

Gene mutation leads to super-virulent strain of TB

...uding AIDS, diabetes or cancer, that they begin to multiply again and cause the active TB disease. "What we have learned is that the granuloma shield not only protects the host, it also protects the TB bacteria from the host's other immune cells and antibiotic drugs that may otherwise kill the bacteria," ...

Regenerative chemical turns muscle cells into stem cells

...tiation and form progenitor cells, which will then multiply and redifferentiate into specialized cells as they form an identical replacement to the missing limb or tail. In humans, the liver is unique in its regenerative capacity, possibly also involving dedifferentiation mechanism. The Scripps Research s...

Study by UCSD gives new insight into how anthrax bacteria can evade a host's immune response

...host immune response, anthrax bacteria are able to multiply unchecked. According to the Centers for Disease Control, approximately 75 percent of people infected with inhalation anthrax die, even with all possible supportive care including appropriate antibiotics. "Although it was known for quite some time th...

JCI Table of Contents, January 15 2004

...t in OspC. These bacteria were able to survive and multiply in feeding ticks; however, they were unable to invade tick salivary glands. The results agreed with their findings that OspC binds to tick salivary gland extracts and that antibody inhibition of OspC inhibits the ability of B. burgdorferi to invade t...

Inhibition of Borrelia burgdorferi protein may reduce Lyme disease transmission

...t in OspC. These bacteria were able to survive and multiply in feeding ticks; however, they were unable to invade tick salivary glands. The results agreed with their findings that OspC binds to tick salivary gland extracts and that antibody inhibition of OspC inhibits the ability of B. burgdorferi to invade t...

U. of Colorado professor pioneering tissue engineering from knees to hearts to brains

...n be injected with chondrocite cells that grow and multiply in the gel-like substance. The scaffolds, which can be injected into the knee as a fluid, dissolve after tissue regeneration, degrading over time as cartilage re-grows in knees. "We and other tissue engineers now use this method to stimulate the gr...

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