wall 2 2

Tag: "wall" at biology news

Genetic defenders protect crops from fungal disease

...eeding structures called haustoria. The plant cell wall is the primary barrier to this invasion and one of... "The resistance mechanisms operating at the cell wall seem to be surprisingly simple," Somerville said. "This suggests it might be possible to reverse eng...

Breaking the mold: Research teams sequence three fungus genomes

...n central metabolic pathways, cell signaling, cell wall biosynthesis, pigment biosynthesis, and secondary metabolite production. In other words, A. fumigatus 's virulence genes are likely complex and mixed up with normal metabolic capabilities, Nierman says. He and his colleagues now plan to systematical...

USC researchers track down the stem cells that create feathers

...stributed in a ring configuration around the inner wall of the vase-shaped feather follicle. This is different from hair stem cells, which are located in a bulge outside the follicle," explains Cheng-Ming Chuong, M.D., Ph.D., professor of pathology at the Keck School and principal investigator on this stu...

Biologists discover new pathway into plant cells

...known that viruses and bacteria can penetrate cell wall barriers and disrupt plant cells, but never before...this is just a protein by itself crossing the cell wall barrier without disrupting its integrity. This is a significant fundamental advance in our understan...

Wisconsin scientists discover a master key to microbes' pathogenic lifestyles

...ges in the organism's metabolism, cell shape, cell wall composition, and changes in virulence gene expressions." These changes, according to Klein, are really a survival program for the microbe, conferring resistance to the host's immune responses. The diseases caused by the fungi can be especially seri...

Discovery of new molecular tools for biosynthesis could lead to advances in use of pectin

...-cellulosic and pectic polysaccharides of the cell wall has, until the 21st century, been slow to unfold."...rocess of manipulating the quality and quantity of wall polysaccharides is crucial and badly needed. "The work [described in the UGA paper] represents a si...

Formation of cellulose fibers tracked for the first time

...unctional connection between synthesis of the cell wall and an array of protein fibers--called microtubules--that help to shape growing plant cells from the inside. "The more we understand about cellulose, the easier it will be to modify it," said Chris Somerville, director of the Carnegie department. "W...

Absence of critical protein linked to infertility

...id. During this period, an embryo attaches to the wall of the uterus, advances into it and eventually attaches to the blood supply and forms the placenta. For a successful pregnancy to occur, stromal cells of the uterus must be transformed into decidual cells, which secrete nutrients that allow the embry...

UCSD team unmasks family of immune system invaders

...ial cells. The epithelial cells form a protective wall without any doors, a barrier that blocks bacterial entry from the intestine and colon into the rest of the body. However, bacterial pathogens can inject effector proteins into the intestinal epithelial cells, creating a door in the barrier. "As a r...

Potential heart benefit found in stem cells

... transplant's effect on the thickness of the heart wall following a heart attack. To test the hypothesis... hearts were removed to measure the left ventricle wall thickness and the density of the corresponding capillaries in four areas: the damaged or infarct ar...

Scientists re-engineer a well-known antibiotic to counter drug resistance

...iotic that attacks the bacteria by inhibiting cell wall synthesis, significantly increasing the drug's spe...analogous single atom change in the bacterial cell wall that accounts for the resistance. The results, Boger added, suggest that no matter how the VRE alt...

Gut protein found to protect against infection and intestinal breakdown

...The researchers focused on a molecule ?FXR ?in the wall of the lining, which binds to bile acids. When FXR was activated by a synthetic binding chemical called GW4064, it was found to activate several genes that are known to protect the intestinal lining or attack bacteria. The research team also found t...

A step forward in the fight against bacterial infections

...o action. One such component of the bacterial cell wall is LPS. The binding of LPS with its specific receptor in our immune system − TLR4 − initiates a long series of reactions that bring on an inflammation, which eliminates the bacteria from our body. Of course, this chain of reactions is str...

Spinal cord bridge bypasses injury to restore mobility

... their sugar branches, thereby preventing the scar wall from building. In a National Institutes of Health-supported animal study, 12 rats had spinal injuries at the cervical level 3 (C3) that resulted in impaired motor functions to their right side limbs. The animals had trouble moving, climbing or groo...

New GI technologies improve internal organ visualization

...interventions. The heart's close proximity to the wall of the esophagus has led researchers to study the ...y as well as the close proximity of the intestinal wall to vasculature, an EUS-guided approach to perform selective angiography is feasible. Safe access to...

No cell walls, no new cancer cells

...als for their walls. And as with a house, the cell wall needs to be built at just the right moment to protect and allow the construction of internal components. A team from the Uppsala Branch of the global Ludwig Institute for Cancer Research (LICR) has not only shown how the cell gets this timing right, ...

No-mow grass may be coming to your yard soon

... are predicted to be involved in growth, like cell wall metabolism. Their up-expression would be predicted to promote cell expansion," according to Chory. The work of other groups, she noted, has shown that brassinosteroids can negatively regulate their own expression as part of a feedback loop that, ul...

Got inexpensive contrast agent? Milk plays new role in imaging

...ontrast to allow better visualization of the bowel wall and clearer delineation between the bowel cavity a...testinal cavity appears dark, while the intestinal wall appears bright due to intravenous contrast enhancement. The dark intestinal cavity contrasting with ...

Cell wall of pneumonia bacteria can cause brain and heart damage

...te to this damage by increasing the number of cell wall pieces shed by dying bacteria. The team also demon...ijack" a protein on the lining of the blood vessel wall and use it to slip out of the bloodstream and into the brain and heart. A report on this study appea...

Microcapsules like it hot and salty

... is important that the permeability of the capsule wall can be adjusted precisely. When the microcontainer is filled, the wall must initially allow the active substance through to the inside. Then the capsule shell must be seal...

1 2 3 4