viruses 2 10

Tag: "viruses" at biology news

Ancient ants arose 140-168 million years ago

...illance tool for the detection of pathogenic human viruses in complex environmental samples such as human and animal waste." Typically, bacteria and viruses are identified by cultivation on selective media and cell lines. However, this process does not work...

Unraveling the viral mechanism

...the door to a better understanding of a variety of viruses that infect people and animals. In a report that ...se tools to understand better how this and similar viruses infect nerve cells and, some day, interrupt that disease process. The advance occurred because of i...

Landmark discovery of a Kaposi's sarcoma-associated herpesvirus receptor

... interested in KSHV because of his interest in how viruses enter cells. A decade ago, his research team was the first to identify CXCR4 as one of the coreceptors that allows HIV to gain entry into cells of the immune system. This discovery quickly led to the identification by Dr. Berger's group and several o...

Wisconsin scientists grow two new stem cell lines in animal cell-free culture

...hey are grown of animal products that could harbor viruses or other deleterious agents. Successfully growing...ving in culture. Some scientists worry that animal viruses and other problematic agents might be taken up in the human cells and infect human patients, should ...

MIT researchers build tiny batteries with viruses

...ts have harnessed the construction talents of tiny viruses to build ultra-small "nanowire" structures for use...terials - cobalt oxide and gold. And because these viruses are negatively charged, they can be complexed between oppositely charged polymers to form thin, flex...

Hopkins study suggests commercially available antibiotic may help fight dementia in HIV patients

...roduced during its normal life cycle, though other viruses make similar proteins. Dementia is a common side effect of long-term HIV infection, but there are no known specific treatments for this complication. According to Rumbaugh, Tat and gp120 are believed to cause dementia by reducing the expression of a ...

New protein target may advance design of HIV and cancer drugs

...he spread of the virus. "When we target specific viruses with drugs, over time patients can become resistant to treatment and the drug becomes ineffective. Therefore, novel biological processes and proteins are attractive targets for antiviral drug development," said lead author Nicholas Farrell, Ph.D., pr...

New human retrovirus originated in mice

...ed evidence contesting that theory. To screen for viruses in the prostate tissue samples, DeRisi and Ganem u...ed as tiny spots on a small glass chip. To detect viruses from tissue samples, the researchers isolated genetic material from each sample and tagged the genet...

Mice lacking key immune component still control chronic viral infections

...e and is closely related to the human gamma herpes viruses Epstein-Barr virus (EBV, the cause of mononucleosi...of cancer known as Kaposi's sarcoma). Other herpes viruses that infect humans include the alpha herpes viruses herpes simplex virus 1 and 2, which cause cold s...

Revolution in the fight against cancer & viruses

...iRNA, that are being developed into drugs to fight viruses and cancer," he said. "We've now taken this a step...s being developed as a weapon in the fight against viruses and cancer," said Professor Williams. ...

For Stanford scientists, RNAi gene therapy takes two steps forward, one step back

... off an overactive gene. With key genes shut off, viruses such as hepatitis B, hepatitis C or HIV are unable to multiply and cause disease. However, some reports had suggested that RNAi gene therapy might induce an immune reaction or switch off the wrong gene or genes. As these concerns faded, things began...

Viral genetic differences are possible key to HIV dementia

...f a "genetic signature" common to the CNS-specific viruses in all 18 individuals, recounts Pillai. They found such a pattern, consisting of four amino acids, within a subregion of the viral envelope gene known as the V3 loop. "The identification of these signature mutations presents convincing evidence tha...

Researchers add crucial information on how the body's T cells react to parasitic diseases

...ble complexity of the problem. In organisms like viruses and bacteria, which have relatively small genomes, analysis can be more direct; however, understanding the targets of the T cell response in complex pathogens such as T. cruzi requires much more. Scientists must integrate information generated from t...

Scientists aim to thwart use of flu as bioweapon

...lu, and ways to prevent that from happening. "Flu viruses are deadly ?witness the 1918 Spanish flu which killed millions of people ?and with modification, they can be made even more deadly," said Hulin Wu, Ph.D., professor in the Department of Biostatistics and Computational Biology and director of the mode...

The structure of a virus infecting bacteria resembles a human virus

...ting bacteria, resembles that of certain dangerous viruses that infect people. Studying this bacteriophage reveals various characteristics about viruses and their life cycle without having to study actual human viruses. Structural biologists Juha Huis...

Magnetism and mimicry of nature hold hope for better medicine, environmental safety

...e clearer pictures of the proteins, DNA, bacteria, viruses and chemicals present in liquids, explains Antonio Garcia, a professor in the Harrington Department of Bioengineering in ASU's Ira A. Fulton School of Engineering. The new method holds hope for significant improvements in such areas as prognosis an...

Research reveals inner workings of immune system 'thermostat'

When bacteria, viruses or parasites attack, immune system cells unleash the soldiers. These "hot" protein compounds kill invaders ?but also trigger inflammation, which, if unchecked, can destroy tissue, induce shock and kill the host. So immune system cells let loose anoth...

Viral hitchhiker inhibits Wolbachia bacteria's ability to proliferate

...d the virus was somehow inducing this process. But viruses pirate cells to reproduce, often killing the cells...copy, the scientists quantified the number of WO-B viruses and Wolbachia cells in the testes of a common host: the fruit-fly-sized jewel wasp, Nasonia vitripen...

Study details hepatitis C ability to block immune system response

... different viral infections, many human pathogenic viruses have evolved distinct strategies to inhibit the early signaling events leading to interferon production. HCV is no different. "We have previously demonstrated that many interferon stimulated genes with antiviral activity are induced in the liver dur...

H5N1 vaccine could be basis for life-saving stockpile

...internationally renowned expert on avian influenza viruses and is senior author of the report in JID. Cross-reactive immunity is the protection that a virus vaccine confers against not only the same virus, but also against variants of the original virus. "Such cross-protection would allow the use of a stoc...

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