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Tag: "invasion" at biology news

Surprising origin of cell's internal highways

...ration and microtubule regulation of migration and invasion probably contribute to the therapeutic effects." ...t of microtubules might offer insight into how the invasion of cancer cells into surrounding tissues could be halted. ...

How plague-causing bacteria disarm host defense

...t the body's immune system through a sophisticated invasion system that injects the effector proteins directly into the host cell's cytoplasm. "More than a decade after its discovery, our understanding of YpkA is still incomplete," Navarro said. "But Yersinia has maintained YpkA over millions of years, so...

Hives ferment a yeasty brew, attract beetle pest

...g their hives. The beetles are also aided in their invasion by a yeast that naturally occurs on pollen and produces, as a fermentation product, the alarm chemical that draws the beetles. "It is possible that bees are being habituated to a low level of alarm hormone," says James H. Tumlinson, the Ralph O. M...

Whiteflies and plant viruses can help each other to speed up biological invasion

...ean/North Africa region, and its recent widespread invasion has been assisted by the worldwide flower trade. The question remains how this pest can increase so rapidly and displace native biotypes of whitefly after it has been transported to new localities. The research compared development, survival, fec...

Mechanisms involved with tumor relapse identified

...te blood cells of the immune system in response to invasion by pathogens or tumors in order to protect the host against infection or cancers. Production of interferon gamma by lymphocytes against tumors is considered a sign of good prognosis; however, recent study findings indicate that this may not be the ca...

Inflammation may play role in metastasis of prostate cancer

...ound a way to turn off Maspin, which may depend on invasion of the tumor with RANK ligand-producing cells that activate IKKa," said Karin. Malignancies progress through stages. In early, non-metastatic tumors, a high level of Maspin is present, but it is turned off in late stages. Early tumors contain low...

New bird, bat species revealed by extensive DNA barcode studies

...l, cancer is a metaphorical example of the perfect invasion by a founder species. Like the first pregnant finch that landed on a deserted island in the Galapagos Archipelago, the first cancer cell in the human body has to undergo many mutations through many generations to establish itself as an invader of dif...

Cancer that colonizes our bodies

...l, cancer is a metaphorical example of the perfect invasion by a founder species. Like the first pregnant finch that landed on a deserted island in the Galapagos Archipelago, the first cancer cell in the human body has to undergo many mutations through many generations to establish itself as an invader of dif...

Key to zebrafish heart regeneration uncovered

...tops," Poss said. "The new blood vessels show poor invasion of the newly regenerating cells, halting the formation of new heart muscle." Poss said that a continued understanding of the processes involved in regeneration of the zebrafish heart could lead to therapies to repair human heart muscle damaged by ...

Math model predicts cancer behavior

... develop the kind of mathematical model for cancer invasion powerful enough for this purpose. The result was p...cotland developed a computational model for cancer invasion and described the model in the Dec. 1 issue of Cell. The model ?a series of mathematical equations t...

The biggest bug in gut discomfort

...with the Golgi apparatus. The resulting full-scale invasion of millions of cells lining the gut can’t be ignored. ...

Edge density key to controlling gypsy moth spread

...ges of the gypsy moth range may help to slow their invasion into virgin territory, according to a team of rese...d of the gypsy moth in the U.S. and found that its invasion has been characterized by regular periods of rapid spread interspersed between periods of little exp...

Two-faced protein can stop metastasis or promote it, researchers say

... p120 catenin, is a key player in both suppressing invasion and promoting it," says the study's senior author, Panos Anastasiadis, Ph.D., a Mayo Clinic cancer researcher. "This is very exciting, because the findings open up a whole new field of discovery for novel therapeutics that should be applicable to mos...

A new understanding of how cells defend themselves against bacterial pore-forming toxins

...pathway that allows epithelial cells to survive an invasion by a pore-forming toxin will prove valuable as biomedical researchers try to develop drugs to fight antibiotic-resistant strains of bacteria that use these toxins as part of their hijacking strategy. ...

Bacteria have their own immune system protecting against outside DNA

...t into how bacteria can protect themselves from an invasion by foreign DNA, yet still take in genetic information from diverse sources that makes them more virulent. "By harnessing foreign DNA, bacteria that cause typhoid, dysentery, cholera and plague have evolved from harmless organisms into feared pathoge...

Ecosystem services and invasive species

...S. Though the initial impact brought about by this invasion has alarmed scientists, this decline is not the first of its kind. Pollen records from its native range indicate that there was a decline in hemlocks that coincided with the population explosion of the Hemlock looper moth (Lambdina fiscellaria) appro...

Bacteria give up secrets in war waged on plants

...the way they get a foothold in plants to launch an invasion -- is less of a secret, according to research published this week by Michigan State University scientists. Under study is the bacterial pathogen Pseudomonas syringae, better known as the disease agent of bacterial speck. The pathogen reared its spe...

Genes discovered that allow gum disease bacterium to invade arteries

...ed that all four mutated strains were defective in invasion of the artery cells and that their ability to surv...ults show that these four genes play a role in the invasion and survival of P. gingivalis inside artery cells," says Rodrigues. "The knowledge of how this path...

Survival of the selfless - scientists find cheats don't always prosper

..."This evidence that a cooperative group can resist invasion by exploitative cheats is unexpected and gives us greater insight into how cooperation evolves. This is important because we live in a world in which cooperations exists at every level, from genes working together to build functioning individuals to ...

Brain's own cannabis compound protects against inflammation

...ain-cell-exciting chemical, called NMDA, caused an invasion of the brain's immune cells, called microglia, and an increase in AEA levels. Importantly, they found that adding AEA to such damaged brain tissue abolished inflammatory damage to the brain cells, but did not reduce the primary "excitotoxic" damage ...

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