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Tag: "plasma" at biology news

First human study confirms that immune cells can be a primary cause of bone loss in gum disease

...ccupancy of 50-60% of such cellular infiltrates by plasma cells (ultimately, differentiated B cells) makes periodontal disease very distinct from other chronic infectious diseases. B cells are known to produce a weapon (antibody) that normally attacks bacteria and protects our body from bacterial infection....

Mayo Clinic researchers discover cancer cells may move via wave stimulation

...ircular ruffled surface structures on the exterior plasma membrane of a cell that can be observed through a conventional light microscope. They form in response to stimulation from EGF and exist for 10 to 20 minutes before disappearing. Waves intrigue researchers because wave-based internalization of activa...

Dying of excitement

...e mammalian central nervous system (CNS) -- in the plasma and cerebral spinal fluid. One possible explanati...patients, those with the mutated allele had higher plasma levels of glutamate and were more likely to suffer from post-stroke neurological problems than those...

Dogs keep dying: Many owners unaware of toxic dog food

...ire collection of a special blood sample (citrated plasma sample) and an assessment by Cornell's Animal Health Diagnostic Center. Any dog suspected of aflatoxin poisoning should also have a liver specimen sent to Cornell to definitively confirm the pathologic changes in the liver unique for aflatoxin toxic...

Polymer aids in blood clotting, pointing way to new treatment

...he effect of adding polyphosphate to platelet-poor plasma in a series of in-vitro experiments to see if it enhanced blood clotting. The results were dramatic, Morrissey said, adding that the presence of polyphosphate may help explain how platelets accelerate the process of blood clotting. Polyphosphate is ...

HPV subtype associated with squamous cell skin cancers

...arched for antibodies to 16 different HPV types in plasma samples from 252 patients with SCC, 525 patients with basal cell carcinomas (BCC), and 461 control subjects. The authors detected genus beta type HPV antibodies in patients diagnosed with SCC more frequently than in control subjects, particularly H...

Anti-HIV drug has potential to prevent transmission in women

...f of these women had low tenofovir levels in their plasma at one or more times during the 14-day study. Further evaluation is needed to determine if absorption of tenofovir into the bloodstream could be beneficial in enhancing the gel's effectiveness or could cause adverse long-term side effects. The study...

Forsyth scientists gain greater understanding of how embryos differentiate left from right

...few cell cleavages in frog embryos. H+-flux across plasma membranes is thus asymmetric at the four- and eight-cell stages, and this asymmetry requires H+-V-ATPase activity. Artificially equalizing the asymmetry in H+ flux, by increasing or decreasing it on both sides equally, both randomized the location of...

Human albumin from tobacco plants

...he price at the pharmacy of albumin produced using plasma is 4 euros per gram, that obtained from yeasts or mammal cells costs between 300 and 4,000 euros per gram. Another option worked on over recent years has been the production of albumin from vegetables, always using nuclear transformation. The novel...

Common bacteria pirate natural mechanism to get inside cells

...Some bacteria and viruses bind to receptors on the plasma membrane and use them to go inside, and that is ho...s to make this move. "When there is a signal, the plasma membrane on the cell surface invaginates ?think of a plasma membrane as a balloon and you poke your ...

Membrane research opens window to benefits for plants, humans

...ddresses the mechanism of gating and regulation of plasma membrane proteins in full detail. "We could see how every single atom moves and how collective motions of a large number of atoms resulted in the opening of the channel," he said. Aquaporins -- discovered in 1991 by Peter Agre, now vice chancellor f...

Past illegal blood donation in China linked to hepatitis C virus infection

...patitis C virus (HCV) infection rates in blood and plasma donors during the 1980s and early 1990s, and that ...nors, and about 3% in non-donors. Selling blood or plasma was the strongest independent predictor for HCV-positive findings. Receiving a blood transfusion was...

Zinc supplements safe for HIV-infected children

...es since the last visit. In addition, HIV-1 RNA in plasma and CD4+ T lymphocyte cell counts were measured on...mentation. The study authors found no increase in plasma HIV-1 viral load measurements in the children receiving zinc, meaning that zinc supplementation is s...

Water management in cells

...estigated the uptake and secretion of water by the plasma membrane of animal and human cells. Cell volume ...nce between water uptake and secretion by the cell plasma membrane. A cell can regulate its volume by adjusting the salt concentrations in and around the cell...

Solution to 'legionella'

... in the water. This wave front produces a luminous plasma around the bubbles, as well as high pressure and temperatures. These pressures and temperatures have two effects: on the one hand, they eliminate the circulating bacteria and, on the other, they generate an oxidative stress that is transmitted throu...

Suppressing growth hormone in early adulthood may prevent cancer

...s could be given as preventative measures to lower plasma IGF-1 before the onset of disease, especially in h... these rats, we found that a modest suppression of plasma IGF-1 beginning shortly after puberty and continued throughout life reduces the incidence of kidney ...

Measuring hidden parasites in falciparum malaria

...t least 1 million deaths annually. Estimates of plasma PfHRP2 concentrations may be useful as a research tool to assess patients' parasite loads and may also provide one way of assessing the severity of a patient's disease. ...

Redesigned protein accelerates blood clotting

...ing each form of factor VIII into hemophilic blood plasma and recording the time it took to cause clotting. Fay, along with Hironao Wakabayashi, M.D., a research assistant professor at the University of Rochester Medical Center and co-inventor, have filed a patent application for the factor VIII redesign u...

Microscopic brain imaging in the palm of your hand

...exams in humans. The fluorescein labeled the blood plasma so the vessels in the brain could be clearly seen. There are many different options for further exploration, now that the technique has been successfully demonstrated, ranging from biomedical research to clinical imaging applications. The Stanford ...

Mechanism for the captation of nutrients in plants- unknown to date

...ticipation of specific transporters present in the plasma membranes - a model implying that, if hundreds of ...scarding the existence of specific transporters in plasma membranes, their number and relevance is considerably inferior to what has been believed to date. In...

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