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Tag: "reproduce" at biology news

Researchers reveal the infectious impact of salmon farms on wild salmon

...ng cloud of contagions. Sea lice larvae mature and reproduce on the seaward salmon with each louse producing 300-800 eggs. This second round of lice larvae can re-infect the fish in the school and can spread to other previously unexposed populations coming from geographically disparate regions. "At about the ...

First-ever Compounds To Target Only Metastatic Cells Are Highly Effective Against Breast, Prostate, And Colon Cancers

...hers report. Cell culture studies suggest they can reproduce that success in a wide range of other cancers, too. "What's unique about these analogues is that they do all this without affecting primary tumor cells, or their blood supply," Dr. Huang said. "To our knowledge, that's a real first." Exact mechanis...

Study shows nanoshells ideal as chemical nanosensors

... effect has beendifficult to control, predict, and reproduce for practical sensingapplications. Now, Rice researchers have shown that nanoshells canprovide large, clean, reproducible enhancements of this effect, openingthe door for new, all-optical sensing applications."Not only did we find that nanoshells are...

Gene Vaccine Protects Mice Against Development Of Her2/neu Breast Cancer

...ng it impossible for the vector version of virusto reproduce itself, but still allowing the vector to express thetarget protein. For this study, the researchers inserted the gene forthe HER2/neu protein in place of the deleted viral genes and thenpackaged the virus vector into virus-like replicon particles, re...

A comprehensive response to HIV could prevent 10 million AIDS deaths in Africa by 2020

...ng it impossible for the vector version of virusto reproduce itself, but still allowing the vector to express thetarget protein. For this study, the researchers inserted the gene forthe HER2/neu protein in place of the deleted viral genes and thenpackaged the virus vector into virus-like replicon particles, re...

Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals

...e adenovirus that readily enters cells but doesn't reproduce itself. Ahrens injected the vector carrying the MRI reporter gene into brains of living mice and imaged the MRI reporter expression periodically for over a month in the same cohort of animals. The research showed no overt toxicity in the mouse brain ...

Mayo Clinic Researchers Create 'Obedient Virus'; First Step To Use Measles Virus Against Cancer

...iology Natural viruses are cellular parasites. To reproduce more viruses, they need to bind to a partner on their target cell, fuse membranes to enter the target cell and then take over the cellular machinery. When they succeed in doing this, an infection occurs. Viruses are so good at taking over cells that ...

Ancient immune defense mechanism is no match for HIV-1

...can silence the ability of a virus to successfully reproduce itself. Although this mechanism has been artificially manipulated to selectively inhibit specific genes in mammalian cells, it was not known whether mammalian viruses naturally elicit this type of immunity in vertebrate cells. Drs. Yamina Bennasser ...

Chemical Engineer Kao Explores Antibiotic Synthesis With DNA Chips

...ssful reverse engineering hinges on the ability to reproduce the mechanism of overproduction in new strains. Ideally, the exact sequence of base pairs causing the mutation could be found and then directly introduced into a new strain. Drug companies use chemicals and radiation to damage DNA and induce mutatio...

Poaching, logging, and outbreaks of Ebola threaten central African gorillas and chimpanzees

... some populations. The action plan noted that apes reproduce slowly, with limited capacity to recover from decimated populations. "This devastating mix of threats leaves us on the brink of losing some of our closest living relatives," said Russell A. Mittermeier, president of Conservation International and ch...

Scientists take aim at virulent bacteria by decoding machinery of key control enzyme

...de. Dam must move quickly, because if the bacteria reproduce with the wrong methylation pattern, gene expression will be foiled and they will lose their virulence. "For the first time, using the 3-D crystal structure, we have been able to see the specific Dam structure in action, including the way it binds to...

Achilles heel of the herpes virus possibly found

.... It can get inside almost any kind of human cell, reproduce in vast numbers, and linger for years in the body, causing everything from recurrent genital blisters to sores around the mouth. Its complications can kill, and it may increase susceptibility to many nerve and brain disorders. But until now, scienti...

Insects develop resistance to engineered crops

...al-gene plants or mixed populations and allowed to reproduce for two years. The researchers found that after 26 generations of the insect living in the greenhouse with single-gene and dual-gene plants housed together, all the plants were eventually damaged by the insects, because over time, greater numbers of...

Secrets to antibody's success against West Nile Virus surprise scientists

...er viruses may have developed tricks that let them reproduce inside macrophages, the immune cells that normally consume and destroy any object that they find covered in antibodies. In effect, these tricks turn antibodies that should be death warrants into passes into cells where invaders can reproduce. Frem...

Virologist finds contagious equine flu in dogs

...eptor to bind to in order to enter the cell and to reproduce sufficiently in the new host. "There are probably many examples of viruses jumping species, but then it becomes a dead-end issue," said Dubovi. Researchers have long known that equine flu was capable of growing in dogs, since scientists experimentin...

3D Atlas Will Help Navigate The Spinal Cord

...nsively depict transverse and horizontal sections, reproduce these in 3D and make some parallel observations in the human spinal cord (when tissue becomes available), thus supporting both experimental and clinical approaches. ...

Researchers create infectious hepatitis C virus in a test tube

...illion people around the world. "The inability to reproduce aspects of the hepatitis C virus life cycle in cel... understood because scientists have been unable to reproduce an infectious form of HCV that they can observe in cell cultures. The method developed by Rice and h...

Microbe has huge role in ocean life, carbon cycle

...s a complete set of biosynthetic pathways, and can reproduce efficiently by consuming dissolved organic matter. "By comparison, humans are mostly junk DNA, with large parts of the human genome having no important function," Giovannoni said. This type of genome streamlining, researchers say, appears to be a m...

Geckos: It's not always about sex

...of all-female geckos doesn't need sex or a male to reproduce and, contrary to expectations, these "Wonder Woman... the hybrid forms of Bynoe's geckos could not only reproduce through parthenogenesis, but were "super tough," just like a mule. Kearney shipped Bynoe's geckos f...

Secret sex life of killer fungus?

...gus has always been thought to lack the ability to reproduce sexually, but new discoveries by a multinational g...e results are important because if the fungus does reproduce sexually as part of its life cycle, it might evolve more rapidly to become resistant to antifungal d...

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