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Tag: "cycle" at biology news

Research details how a virus hijacks cell signals to cause infection

...is investigations revealed steps in a virus's life cycle that were previously unknown. "Eventually this understanding may yield clinical benefits, by contributing to future therapies to block viral infections. For now, we have learned more about cell functions, and how viruses may evolve unexpected methods...

High resolution 'snapshots' detail dynamics of a cocaine antibody

...hat occur during the antibody's complete catalytic cycle show the molecular basis for catalysis and reveal ... health issues. With the snapshots of the complete cycle of the cocaine antibody catalytic reaction, we have shed new light on the sequence of events in an a...

'Genetic network' guards against lethal DNA damage

...A replication, the halting of replication and cell cycle progression by "checkpoints" so that damaged DNA can undergo repair, and responses to oxidative stress necessary for reducing the intracellular levels of highly reactive molecules that bind to and damage DNA. The yeast has about 6,000 genes, of whic...

Strawberries by design

...o the small size of its genome, short reproductive cycle and small plant size, F. vesca is an ideal model system for genomics in commercial strawberry. The rapid growth of new shoots, the high number of seeds generated and the ease in which new plants may be established, make this plant an ideal candidate ...

Rewind, please: Nature paper shows that cell division is reversible

...f the journal Nature. "No one has gotten the cell cycle to go backwards before now," said Gorbsky, who hol... OMRF. "This shows that certain events in the cell cycle that have long been assumed irreversible may, in fact, be reversible." Cell division occurs millio...

Mayo Clinic researchers challenge sepsis theory

...the receptors (toll-like receptors) set the sepsis cycle into motion. "This finding was very exciting," notes Dr. Platt. "It explained how the sepsis syndrome can occur when there isn't an infection -- which it does in some cases." However, Drs. Brunn and Platt saw an obvious problem with this explanation...

Fruit fly reveals a potential connection between dementia and cancer

..., loss of neurons could be prevented when the cell cycle was genetically blocked or when flies were fed anticancer drugs. Cell-cycle activation depended upon a hyperactive cell growth molecule, TOR (target of rapamycin), also known to be abnormally activated in Alzheimer's disease. By establishing these ca...

Hopkins researchers discover genetic switch that turns off an oxygen-poor cell's combustion engine

...down the glucose without using oxygen; and the TCA cycle in the mitochondrion, which normally uses oxygen t...cell produces acetyl CoA and feeds it into the TCA cycle within the mitochondrion. The mitochondrion then processes acetyl CoA using oxygen to obtain large a...

Vital ocean prey play active role in environment

...ganisms of the open sea, key aspects of their life cycle have remained murky. Understanding krill is impor...uveniles are found inshore of the adults. The life cycle thus keeps krill in younger stages separate from adults, which reduces competition for food and less...

US woman gives birth to baby from world's first frozen donor egg bank

...fresh donor eggs such as synchronizing the donor's cycle with the cycle of the infertile woman are virtually eliminated with frozen donor eggs from the CEI bank. Frozen don...

The critical importance of mangroves to ocean life

...matter is an important player in the global carbon cycle that regulates atmospheric carbon dioxide and climate. "To understand global biogeochemical cycles it is crucial to quantify the sources of marine dissolved organic carbon," Dittmar writes. "Here we show that mangroves play an unexpected role in the...

Oxidation defense in mosquitoes benefits malaria parasite

...d be synthesized, and that would allow the malaria cycle to be interrupted, therefore representing a novel avenue for the treatment of malaria. ...

New fruit fly protein illuminates circadian response to light

...n the fruit flies were shifted from one light-dark cycle to another, the mutant flies took two days longer to adjust their sleep-wake cycle to the new light-dark schedule. "The behavior of the mutant flies is similar to that displayed in a...

Novel connection found between biological clock and cancer

...lock, suggesting links among circadian timing, the cycle of cell division, and the propensity for cancer. ... mutation can affect the clock as well as the cell cycle is novel," says Jay Dunlap, professor and chair of genetics at DMS. "It suggests a fundamental conne...

UGA study explains peaks and troughs of dengue epidemics

...data together, you see about an average three-year cycle with some seasonal component to it." In addition to helping resolve a long-standing debate in public health, the study, published this week in the early online edition of the journal Proceedings of the National Academy of Sciences, gives researcher...

Iron critical to ocean productivity, carbon uptake

...cence. The role of the ocean in the global carbon cycle is critical ?and nowhere is it more pronounced tha... new cells. A better understanding of this carbon cycle is a key to studying global climate change. Iron fertilization of phytoplankton is also a key to a h...

Cycles of cell death, proliferation key to liver cancer

... regeneration in liver tissue, it is the repeating cycle of damage, inflammation and regeneration that leads to liver cancer," said Karin. "However, this knowledge is not satisfactory until we find out if it applies to humans." ...

The structure of a virus infecting bacteria resembles a human virus

...rious characteristics about viruses and their life cycle without having to study actual human viruses. St...n determine various characteristics about the life cycle of viruses that are much harder to study using dangerous human viruses. The newly described structur...

Wild bees and the flowers they pollinate are disappearing together

... or indeed whether the two are locked in a vicious cycle in which each is affecting the other. It's also not clear as of yet what the ultimate causes of the declines are, although land use change, agricultural chemicals and climate change may be important factors. The researchers hope to clarify these iss...

Internal body clock dictates timing of different types of stroke

...ng the different types, by dividing the wake-sleep cycle into 12 two hour intervals. Men tended to be around five years younger than women for all the different types, but there was little variation between the sexes in respect of the timing of the various types of stroke. All three stroke types regist...

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