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Tag: "invades" at biology news

Toxoplasmosis infection trick revealed by scientists

...ed onto the surface of the parasite just before it invades host cells in the human body. They found that the protein known as TgMIC1 binds to certain sugars on the surface of the host cell, assisting the parasite to stick to, and then enter the human cell. Using a novel carbohydrate microarray the team w...

Sandia researchers take new approach to studying how cells respond to pathogens

...he early events in immune response when a pathogen invades a body. Understanding the early steps could lead to better ways to diagnose and stop disease before there are symptoms and development of more effective therapeutics. Most existing research into how immune cells respond has been done by looking at...

Scientists find potential 'off-switch' for HIV virus

...system against illness. When an HIV virus particle invades a T cell, most often it converts the cell into a factory for making other viral particles, killing the cell in the process. Without these T cells, the body loses its ability to repel other infectious bacteria and viruses, and eventually dies from ass...

Molecular 'on/off switch' controls immune defenses against viruses

...e to hepatitis C. It's known that when a virus invades a cell, the RIG-I protein triggers the body to generate an immune response. Once the virus has been cleared out, the LGP2 protein turns off the RIG-I signals. This interaction between RIG-I and LGP2 is vital for properly regulating immunity, but v...

UGA scientists engineer root-knot nematode resistance

..., about 2,000 plant species in all. The nematode invades plant roots, and by feeding on the roots' cells, they cause the roots to grow large galls, or knots, damaging the crop and reducing its yields. Working with assistant research scientist Guozhong Huang and research technician Rex Allen, Hussey discov...

How bad is malaria anemia? It may depend on your genes

...rly childhood. Once in the bloodstream, plasmodium invades liver and red blood cells and makes more copies of itself. Eventually, as red cells break and free plasmodium to infect other cells, and as the body's immune system works to kill infected cells, the total number of red blood cells drops, causing anem...

Scientists aim to thwart use of flu as bioweapon

... from around the nation to discuss exactly how flu invades the body, how the body responds, and how mathematicians, statisticians, and computer scientists are working to help understand the pathogenesis of flu infection. The group will also talk about the potential of flu to be intentionally modified for use...

Study reveals classic symbiotic relationship between ants, bacteria

... fungus they cultivate for food, the parasite that invades the fungus, and the bacteria that the ants harbor to fight the parasite. The phenomenon is a classic example of mutually beneficial symbiosis, and Currie views it as a model system with the potential to shed light on the way other organisms interact...

St. Jude projects 90 percent cure rate for ALL

...tem cell transplantation and treatment of ALL that invades the central nervous system, according to Pui. "We are now testing the feasibility of omitting irradiation for all patients and reserving this treatment for only those children who suffer a relapse," he noted. "Irradiation of the brain can cause seco...

Invasive species harms native hardwoods by killing soil fungus

... of garlic mustard. "This suggests garlic mustard invades the understory of mature forests by poisoning the allies of its main competitors," Stinson says. "By killing off native soil fungi, the appearance of this weed in an intact forest could stifle the next generation of dominant canopy trees. It could al...

Infection 'alarm' yields clues to immune system behavior

... warning message to cells when an infectious agent invades the body. The findings are important because this biological intruder alarm causes the body's immune system to leap into action to fight the infection. Learning more about how this process works, the researchers said, could lead to better treatments ...

UCLA scientists discover immune response to HIV differs, even in identical twins

... to develop a vaccine for everyone." When a virus invades a body, the cellular immune response targets small parts of proteins in the virus. This targeting mechanism itself is genetically determined. ". The virus tries to escape that immune response by mutating and changing shape. The twins' targeting of ...

Same-sex mating by fungi spawned infection outbreak, evidence suggests

...ns. The potentially life-threatening C. neoformans invades the central nervous system to cause disease. It most commonly affects immune-compromised patients such as organ transplant recipients and cancer patients -- whose immune systems are crippled by immunosuppressive drugs or chemotherapy -- and people wi...

Plant wounds trigger bacteria

...ors, which grow when a fragment of the plasmid DNA invades the plant's own DNA. Crown gall tumors mostly strike the trunks or stems of dicot plants, tree or vines near the ground where freezing occurs during winter and a wound forms in spring. Such fruit trees as cherries and peaches, raspberries and high-...

Several minute intermediate stage in virus-cell fusion discovered; opportunity for drug development

...atening infection in the body, a virus such as HIV invades body cells by first merging, or fusing, with the c... a brief pause during the process by which a virus invades a cell provides a possible new drug target in the fight against HIV and other similar microbes. "Ou...

Study: Predatory dinosaurs had bird-like pulmonary system

... The new study, which examined how the air system invades the skeleton in areas such as the neck, chest and hips, finds similarities between the vertebral column of dinosaurs and birds that point to a common soft tissue system as the culprit. Though probably not identical to living birds, "it's nothing like...

Gene discovery sheds light on causes of rare disease, cancer

...ology. Cossart and Veiga detailed how Listeria invades cells by activating cellular machinery that transp...l transport tagged Met, Listeria stows away and invades the cell. By manipulating the gene expression of the cells Listeria was invading, the researche...

Hide and seek: Researchers discover a new way for infectious bacteria to enter cells

...ology. Cossart and Veiga detailed how Listeria invades cells by activating cellular machinery that transp...l transport tagged Met, Listeria stows away and invades the cell. By manipulating the gene expression of the cells Listeria was invading, the researche...

New protein vital for immune response is found in surprise location

...where have previously found that when an RNA virus invades a cell, a protein called RIG-I first intercepts the virus and binds to viral genetic material. That interaction starts a cascade of biochemical reactions that eventually triggers the cell to make a protein called interferon, which in turn fights off ...

Chimp genome reveals a retroviral invasion

...lls) or the germline (sperm or egg). If the virus invades a nonreproductive cell, infection may spread, but ...he host. A retrovirus is called endogenous when it invades the germline and gets passed on to offspring. Because endogenous retroviruses can alter gene functio...

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