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Tag: "walls" at biology news

Bioartificial kidney under study at MCG

...able for transplant. The cells are grown into the walls of thousands of hollow fibers contained in a cartridge similar to those used for traditional dialysis. With dialysis, a patient's blood runs through the fibers and a solution with the normal composition of electrolytes runs on the outside. Through o...

Great White shark evolution debate involves WSU Lake Campus geology professor

...is apparent when entering his office. The door and walls have pictures of shark teeth, and there are posted references to fossils and a geological time table. The research scientist makes imprints of the teeth, then digitizes the picture to establish grids of different combinations that are analyzed by a ...

Polymers with copper show promise for implanted sensors

...ccurs in the human body to prevent clotting on the walls of your own blood vessels," said Meyerhoff. "Your endothelial cells---the cells that line all of your blood vessels---generate nitric oxide. The nitric oxide produced in this layer of cells diffuses back into the blood vessel walls, where it relaxes ...

Molecule that usually protects infection-fighting cells may cause plaque deposits inside arteries

...go on to encourage buildup of fats on the interior walls of arteries, according to Dr. Toru Miyazaki, senio...hardening of the arteries," occurs when the inside walls of an artery become thicker and less elastic. This narrows the space for blood flow and can lead to...

Key mechanism in genetic inheritance during cell division identified

...tay attached to microtubules, hollow fibers in the walls of biological cells that are responsible for the f...leton in biological cells that gives shape to cell walls and other structures, and controls the transportation of substances in and out of a cell. During cel...

Researchers unlock mechanism creating jigsaw puzzle-like plant cells

...ay a critical role in the development of leaf cell walls and leaf structures in a controlled and ordered way and that genetically over expressing one or the other leads to cells lacking the interlocking jigsaw puzzle appearance. While the researchers unlocked a fascinating mechanism of biochemical crossta...

Grizzlies set to invade high Arctic?

...aw prints in the mud. And from the cabin's outside walls and a guy wire attached to the roof they collected two intriguing brown hairs. These were sent for analysis to Wildlife Genetics International Inc. in Nelson, British Columbia, one of the world's premier bear DNA labs. The result: the genetic analysi...

Newly Discovered 'Branding' Process Helps Immune System Cells Pick Their Fights

...tists suspect oxidative damage in the blood vessel walls may lead to immune reactivity that contributes to narrowing and stiffening of blood vessels. ### Herzog J, Maekawa Y, Cirrito TP, Illian BS, Unanue ER. Activated antigen-presenting cells select and present chemically modified peptides recognized by...

Natural Killers Could Lead to New Hepatitis Treatments

... coming to a stop and then crossing through vessel walls in response to a signal.?/p> The researchers observed that the roving NKT cells stopped their movement when alerted by a foreign protein, called an antigen, “We think this is a reflection of their normal function of searching for antigen,?said Li...

Searching the depths of the straits of Florida for disease cures

...g its length. Prior to that cruise the steep rocky walls had only been seen from submersibles by geologists...feet, which suggests that they will find the rocky walls that most commonly foster diverse deep-water ecosystems. The Cay Sal Bank is located on the edge of...

The making and breaking of microtubules

...ide by side, extending longitudinally, to form the walls of a cylindrical microtubule. The so-called minus end of the microtubule grows slowly and is often anchored to a cellular structure. The other end, the plus end, is a hotbed of activity. In the presence of GTP the microtubule's protofilaments acquir...

Researchers find first evidence of venom system in extinct mammal

...n venomous snakes. He added that the fact that the walls of the groove are covered with enamel indicates the groove is not a product of post-mortem exposure and splitting but rather is the natural design of the tooth. "The groove in these teeth would have acted as a gutter, conducting fluid from its source...

Scripps research scientists solve structure of a critical innate immune system protein

...popolysaccharide, a chemical component of the cell walls of certain bacteria like Neisseria meningitides--one of the leading causes of bacterial meningitis. TLR9 recognizes bacterial DNA that contains distinguishing CpG dinucleotides motifs . TLR3 in Detail Likewise, TLR3 recognizes double-stranded RNA, ...

New lead reported in tumor angiogenesis

...n displayed on the surfaces of cells that line the walls of our blood vessels. This physical interaction, l...dothelial cells, which are the cells that line the walls of the blood vessels, there is no indication that resistance is a problem. It's an intriguing idea, ...

Discovery of T-cell 'traffic control' boosts new drug promise

... and a tendency for airways to constrict as muscle walls develop abnormally, Goetzl says. "Fully exploiting this approach for treatment of autoimmune diseases and transplant rejection will depend on developing new drugs that block only the immune type of S1P receptor," he adds. "But early studies by a num...

Device traps, disables harmful bacteria

...- a poison present in gram-negative bacterial cell walls that can cause severe inflammatory responses -- with and without the air filters operating under similar conditions. They compared the performance of the filters twice, one year apart, and found that the filters reduced concentrations of culturable b...

Why do aneurysms form? New studies suggest leading role for white blood cells

...rophage whit blood cells were present in the aorta walls of the rats that lacked L-selectin. "Much further research is needed, but it's possible that a treatment based on L-selectin could be developed to prevent AAA development in high-risk patients," says Upchurch. "In addition to better screening and ad...

One bacteria stops another on contact

...y has indicated that E. coli cells may hide in the walls of the bladder and urinary tract in a dormant state, explained Low. It is possible that the newly discovered CDI system contributes to this process. "By studying the CDI system, we hope to understand more about how bacteria interact with each other ...

How HIV disables the cells' call for help

...d that FP locks on to several proteins on the cell walls that are involved in invoking a large-scale immune response, effectively shutting them down. From their new understanding of how a tiny virus can gain control of the body's immune response, the scientists made an intuitive leap. In autoimmune diseas...

Environmental lessons from tsunami as world's coastal population doubles

...stal disaster than man-made structures such as sea walls or artificial reefs. Globally 23 per cent of the world's population (1.2 billion people) live within 100 km of the coast and this figure is likely to increase to 50 per cent in the next twenty five years as people flock to coastal cities ?many these...

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