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Tag: "connection" at biology news

Slow brain waves play key role in coordinating complex activity

..." Knight and his colleagues continue to probe the connection between waves of different frequency in the brain and are building a more closely spaced grid of electrodes that can measure finer detail on the brain's surface. They also plan to combine brain grid recordings with recordings from individual neurons ...

Two central mysteries in genome inheritance solved at UCSD

... a protein group that forms the chromosome-spindle connection involved in pulling apart the two replicas of the ...lymers during this time, and interfering with this connection ?using drugs that bind to microtubule polymers ?is a common chemotherapy strategy used to target and...

A new male-specific gene in algae unveils an origin of male and female

...ir new work, the researchers established a genetic connection between male sexuality of an oogamous multicellular green algae species, Pleodorina starrii, and one of the mating types of its isogamous ancestor, the unicellular alga Clamydomonas reinhardtii. In C. reinhardtii, isogamous sexual reproduction occ...

History-hunting geneticists can still follow familiar trail

...lation than a smaller population." However, the connection between mtDNA and population size was questioned this year when French scientists analyzed vast groups of gene sequences from more than 3,000 animal species. They speculated that an evolutionary tendency for species to keep helpful genes and sift out...

76 percent of workers older than 60 years of age are overweight or obese

...cludes, according to his analysis, that there is a connection between metabolic syndrome and minor degrees of renal dysfunction. Metabolic Syndrome and cardiovascular illness The metabolic syndrome has acquired increasing interest in the area of prevention. In the first place, this syndrome is associate...

Fatty fish protects against cancer

...re sent a questionnaire on their dietary habits in connection with their mammography scan. Now, with the help of another questionnaire a decade later and the cancer registry, scientists at Karolinska Institutet have concluded that women who eat fatty fish gain significant protection against renal cancer. At le...

'Killer' B cells demonstrate evolutionary link between fish and mammal immune systems

...iology. "I believe it is evidence for a very real connection between the most primitive forms of immunological defense, which has survived in fish, and the more advanced, adaptive immune response seen in humans and other mammals." About 400 million years ago, the earliest ancestors of modern fish split off of...

Age-related changes in DNA repair illuminate the connection between age and genetic damage

... to ensure the healthy functioning of cells, and a connection between aging and DNA damage has long been suspected. One line of evidence supporting the connection is that defects in certain genes needed for DNA repair produce maladies that mimic those of accelera...

Jefferson scientists find aging gene also protects against prostate cancer development

...Richard Pestell, M.D., Ph.D., hope the newly found connection will aid in better understanding the development of prostate cancer and lead to new drugs against the disease. SIRT1 is a member of a family of enzymes called sirtuins that have far-reaching influence in all organisms, including roles in metabolism...

Study suggests evolutionary link between diet, brain size in orangutans

...first demonstration in primates of an evolutionary connection between available food supplies and brain size. Based on their comparative study, the scientists say orangutans confined to part of Borneo where food supplies are frequently depleted may have evolved through the process of natural selection comparat...

A reason why video games are hard to give up

...opportunities for achievement, freedom, and even a connection to other players. Those benefits trumped a shallow sense of fun, which doesn't keep players as interested. "It's our contention that the psychological 'pull' of games is largely due to their capacity to engender feelings of autonomy, competenc...

MIT finds most complex protein knot ever seen

...nd in yeast, supporting the theory that there is a connection between the knot and the protein's function. This also seems to suggest that the knot has been "highly preserved throughout evolution," Virnau said. Until now, scientists have not paid much attention to knots in proteins, but the MIT researchers ho...

Electronic chip, interacting with the brain, modifies pathways for controlling movement

... cord, or muscle, and thereby set up an artificial connection that operates continuously during normal behavior. This recurrent brain-computer interface creates an artificial motor pathway that the brain may learn to use to compensate for impaired pathways." Jackson found that, when the brain-computer interfa...

Worm links cancer risk to ageing

...o have dual functions opens a new way to study the connection between ageing and cancer." Scientists have long known that, statistically, ageing is a huge factor for cancer but have so far struggled to understand why that is. Professor Lithgow said: "If we look at checkpoint proteins as a gear, we have known ...

What controls stickiness of 'smart' chromosomal glue

... holding the chromosomes together at their central connection point, the centromere. Only in a second stage of meiosis that gives rise to haploid sperm or egg cells do centromeric cohesins become cleaved. This precisely controlled centromeric "stickiness" is essential for the accurate segregation of sister chro...

Researchers attack tumor cells by exploiting dependency on sugar metabolism

...the June issue of Cancer Cell reveals a functional connection between carbohydrate-driven energy production and tumor maintenance. Importantly, the results suggest that inhibition of a specific aspect of glucose metabolism may represent an attractive and potentially well-tolerated approach to interfering with t...

In drug design, a loose fit may be best bet

...eceptor are, the scientists conclude, with a loose connection being more effective than a tight one. The finding... be the case, the researchers suggest that a loose connection between hormone and GPCR may allow a hormone to repetitively dock to and undock from its associated ...

Gene first linked to rare disease may trigger skin cancer, other tumors

A gene first identified in connection with a rare disease in which patients develop mult...ancer-promoting protein Bcl-3, first identified in connection with some forms of leukemia. That modification bars the oncogenic protein's entry into the cell nucl...

U of M researchers find immune-activating cells in intestines

...ue of the journal Immunity, released today. "This connection between the group of cells and immune response will help in studying and developing treatments for diseases that affect the gastrointestinal system," said Stephen McSorley, Ph.D., professor of medicine and primary investigator on the project. Resea...

Genes discovered that allow gum disease bacterium to invade arteries

... offering one possible explanation for a perceived connection between gum disease and heart disease. Scientists from the University of Florida, Gainesville, present their findings today at the 106th General Meeting of the American Society for Microbiology in Orlando, Florida. "Aside from lifestyle and geneti...

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