Tag: "reactive" at biology news

New factor implicated in allergy and asthma attacks

... extract containing NADPH oxidase produce damaging reactive oxygen species in cell culture and, in experiments...m which NADPH oxidase had been removed produced no reactive oxygen species, and resulted in a much smaller increase in numbers of inflammatory immune cells. "We...

Gene expression in the aging brain

...one to DNA and proteins by "free-radicals" (highly reactive molecules produced by the metabolic activity of mitochondria). It predicts that more metabolically active tissues will show greater age-related differential gene expression. The results of this study support this theory since the more metabolically a...

JCI Table of contents August 1, 2005

...PH oxidases. These pollen NADPH oxidases increase reactive oxygen species in the lung and other pro-inflammatory factors in the fluid lining the airways. Removal of NADPH oxidase activity from the pollen inhibited allergic airway inflammation in sensitized mice. Thus, oxidative stress generated by pollen N...

Tips from the Journals of the American Society for Microbiology

...mily. In the study a new diagnostic tool that uses reactive primers to detect for each family of viruses followed by DNA probe technology to differentiate between virus species within each family was tested. Researchers were able to accurately identify herpesviruses, specifically herpes simplex virus type 1 ...

Dangerous tricksters: Some bacterie use immune cells to reproduce

...the phagosome and confront the microbe with highly reactive digestive enzymes. A few hours after the first alarm bells have rung there is nothing left of the bacterium, and the potential danger has been eliminated. Multiplication inside the killer This is what normally happens. However, a whole range of pat...

Preserving a 460 year old wreck

...ater. This helped to understand how accessible and reactive the different sulphur compounds found are to acid-producing oxidation. Plenty of iron and pyrite is also present in the Mary Rose, which is a concern, since in the moist wood iron ions can catalyse the conversion of sulphur to sulphuric acid in the ...

Fast, accurate detection of explosives on airport luggage possible

...ork with DESI, which involves directing a spray of reactive chemicals onto a surface to dislodge suspicious chemicals and sucking the mixture into a spectrometer for analysis, has allowed them to detect hazardous substances at unprecedentedly low quantities and with equally unprecedented speed. "Trace and res...

EPA-led group finds same protein that attracts nutrient iron protects lung from particles

...esulting in cellular iron uptake, and limiting the reactive oxygen species generated by iron and other redox-active metals." Next steps Ghio said the mechanisms uncovered in their experiments so far indicate that "if we follow the iron, we may be able to change the types of toxic reactions to all kinds of p...

Anti-aging hormone reduces reactive oxygen species

... increasing the cell's ability to detoxify harmful reactive oxygen species. The research appears as the "Paper...easing the ability of the cell to detoxify harmful reactive oxygen species, thereby increasing resistance to oxidative stress of the body." The protein acts by...

UCR environmental scientists propose chemical solution to cleaning California's Salton Sea

...mer acts as a coagulant aid by chemically bridging reactive groups and increasing floc size....

University of Utah hydrogel plays critical part in organ 'printing' study

...nsists of two sugar chains that, when mixed with a reactive substance, crosslink--the chemical equivalent of weaving cloth--and change within minutes from liquid into gel. The hydrogel breaks down and the cells use these fragments to build a scaffolding that induces tissue regeneration and, in the cases of wo...

Reify corporation announces Myosight(tm)

...chnology has been essential in our research on how reactive oxygen species mediate cardiomyocyte phenotypes. The ability to perform experiments and generate results from a wide range of cells all at once saved us significant time and effort, and gave us a high degree of confidence in our research results. In ...

Innovative research set to push boundaries of cancer care

...ll exposed to radiation split apart, creating high reactive oxygen free radicals capable of damaging cellular molecules. Radiation can damage epithelial cells and lead to permanent hair loss, among other effects, and certain types of systemic chemotherapy can produce hearing loss and damage to a number of org...

Recycled or revamped therapeutics find novel anti-cancer applications

...er cells at high concentrations, ZIO-101 increases reactive oxygen species within cancer cells leading to thei...hat consume themselves create excessive amounts of reactive oxidative stress a molecular event that can promote additional lesions in the genetic code that fur...

JCI table of contents: November 23 2005

Immunological karma: T cells reactive to old flu infections make unrelated viral infections worse Childhood infection with Epstein-Barr virus (EBV) is often asymptomatic, while the same infection in adolescents and adults causes infectious mononucleosis (IM). Liisa Selin and colleagues...

The unfolding of amyloid's true colors

...{alpha} amyloid fibrils bind and orient the highly reactive organic melanin precursors, mitigating the cellular toxicity observed when M{alpha} amyloid production is halted by mutation. The authors also raise the intriguing idea that, given the propensity for many proteins to form amyloid fibrils, this confo...

Mercury in atmosphere could be washed out more easily than earlier believed

...cluded significant concentrations of a type called reactive gaseous mercury. "After nearly half a year of resu...rth in remote, unspoiled regions. The type called reactive gaseous mercury basic, or elemental, mercury that has combined with another substance is important...

Hearing loss from chemotherapy underestimated

... as a free radical scavenger, it hunts down highly reactive atom clusters believed to cause similar hearing loss caused by noise trauma. The main aim is to determine a safely tolerated dose of NAC in humans. Once the safe dose is determined, Phase 2 efficacy testing begins to see if NAC, combined with STS, wi...

Fat overload kills mammalian cells key culprit identified

...sence allowed cells to withstand assault by highly reactive oxygen molecules. According to study authors, this indicates that EF1A-1 probably contributes to cell death from oxidative stress, which is known to stem from high lipid levels. Cytoskeletal changes seen in cells missing EF1A-1 suggested to the resea...

Scientists find unusual lung-cancer tumor-suppressor gene

...ation, and that drugs that reverse methylation can reactive it. The researchers also used a lung-cancer cell line to show that if the active version of the TCF21 gene is placed in tumor cells, the active gene will slow the cells' growth rate. Lastly, the researchers showed that mice injected with lung-tumor...

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(Date:8/21/2014)... tube connectors, designed by an international standards process, will ... According to an invited review published in the OnlineFirst ... NCP ), the official journal of the American Society ... will greatly reduce the occurrence of misconnection that can ... connectors, which are used to join medical devices, components, ...
(Date:8/21/2014)... the pancreas digesting itself resulting in severe abdominal pain, ... around 20,000 patients are diagnosed with the disease resulting ... treatment is restricted to intravenous fluid and nutritional support. ... Life Sciences, who led the research, said "The major ... stones and excessive alcohol intake combined with a high ...
(Date:8/20/2014)... University of Tennessee, Knoxville, research finds life can persist ... professor was part of a team that examined waters ... Antarctic ice sheet and found the extreme environment supports ... by Jill Mikucki and her colleagues has implications for ... in the solar system. The findings are published in ...
Breaking Biology News(10 mins):New feeding tube connectors will improve patient safety 2Insulin offers new hope for the treatment of acute pancreatitis 2University of Tennessee research uncovers subglacial life beneath Antarctic ice sheet 2
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