Tag: "uptake" at biology news

Gene Discovery Could Overcome Aluminum Barrier To Higher Wheat Yields Worldwide

...sterious role of protein synthesis in blocking the uptake of aluminum in the cereal plant's roots. He works at the ARS <a href="http://www.agron.missouri.edu/ars_columbia/pgru.html">Plant Genetics Research Unit in Columbia, Mo. "If the international collaboration and support continues, we should b...

High Levels of Vitamin C Prove Toxic to HIV

...e immune system. The researchers studied vitamin C uptake and its effects on AIDS-virus production inHIV-inf... experience a three- to five-fold increase in the uptake of vitamin C in the form of dehydroascorbic acid; and accumulate two to three times more vitamin C i...

Erodible plastic microspheres could be effective oral drug delivery system

...ts. After three andsix hours, there was an intense uptake of the spheres by cells lining theintestines, live...ivity of dicumarol could beexplained by intestinal uptake of up to 47 percent of the microspheres afterfeeding. Usually, when dicumarol is administered orally...

Researcher Discovers Plant Genes For Phosphate Uptake

... would cause the plants to beef up their phosphate uptake mechanisms. It did. Then they probed the DNA libraries of the starved plants for genes that produce phosphate transporter proteins. They found the genes there, isolated them, and decoded them. They also noted that the phosphate-starved plants sent o...

Cellular 'Short Circuit' Causes Insulin Resistance

...y messages from theinsulin receptor to the glucose uptake machinery in cells undergoexcessive phosphorylation (a process in which they acquire phosphorusatoms). Such abnormal phosphorylation generates a "short circuit" thatprevents the insulin receptors from communicating their "messages" tothe cells' inter...

Gene Therapy Enables Transplantation Without Immunosuppressive Drugs

...r harvesting and prior to engraftment,resulting in uptake by the organ. The procedure is performed in low-temperatureconditions that further enhance preservation of the organ. After the transplant surgery, the gene is expressed in the liver in theform of the CTLA4Ig protein. This protein blocks the ...

Carbon In Boreal Forests: Temporary Or Permanent?

...tures under natural conditions, its rate of carbon uptake fromthe atmosphere gradually decreases to zero. A mature stand is more susceptibleto increased mortality from insects, diseases and forest fires, eventuallyreturning the carbon stored in vegetation and soils to the atmosphere. In turn,seedling regrow...

Growth Factors Shown To Increase Vitamin C In The Immune System

...sh a role for the growth factors in stimulatingthe uptake of vitamin C in host defense cells, connecting increased vitaminC uptake with activation of immune function," said Dr. Golde. Although many claims have been made for the pos...

Rockefeller University Researchers Hunt For Type 2 Diabetes Susceptibility Genes

...issues such as muscle, leading to impaired glucose uptake fromthe blood and increased levels of blood glucose. Type 2 diabetes is the mostcommon form of diabetes, accounting for 90 to 95 percent of cases. In about 5percent of cases, inheritance follows a classic autosomal dominantpattern?anyone in a family ...

Cystic Fibrosis Gene Protects Against Typhoid Fever

...s from the cell membrane. These agents blocked the uptake of S. typhi by CFTR, thus identifying theprotruding CFTR segment as the S. typhi binding site through which it enterscells. "Uptake and ingestion of S. typhi by epithelial cells is part of the body'snormal protective response," explains Dr. Pier. "E...

As A 'Carbon Sponge,' Iron-Poor Coastal Waters Can't Always Do The Job, NaturePaper Shows

...ersial and notyet fully understood, but biological uptake of carbon dioxide by the coastalocean is one important piece of the fossil-fuel puzzle," Hutchins says. "Globalclimate-change models reflect a host of complex physical events--including theamount of carbon dioxide stored by oceans. If certain near-sh...

Chemical In Oyster Shells May Help Clean Oil Spills

... use in agriculture. The polymer enhancesplants -- uptake of nutrients from the soil, which could allow farmers to use lessfertizer -- subsequently saving them money and protecting the environment. Wheeler and Donlar Corp.'s work with the degradable polymer won them theEnvironmental Protection Agenc...

Purdue Golf Course Serves Double Duty As Research Lab

...cess; and reduced water infiltration and nutrient uptake are all obstacles to growing trees in new housing developments. New golf course construction presents many of the same landscaping problems. Urban forester Rita McKenzie and Harvey Holt, professor of forestry, have planted 1,300 bare-root gre...

Duke Studies Show U.S. Central Plains Vulnerable To Global Warming

...ou go north tosouth, the overall balance of carbon uptake and release in the scars, and thescars' re-growth,... release of carbon dioxide, might cause atransient uptake as these scars reform into peat. The transient dynamics on thedecades to centuries scale could be ve...

Scientists Closer To Locating Gene That May Explain Cholesterol Absorption

... explain the mechanismsresponsible for cholesterol uptake from the diet and on mechanisms that protectsus from absorbing and retaining substances in food that are potentiallyharmful," said co-author Dr. Michael Brownstein, chief of the NIH's Section onGenetics: People Investigating Genes. The resear...

Pitt Neuroscientists Uncover Mechanism For Neuron Death, Counter Long-Held Assumptions About This Process

...also exposed the cells to chemicals that block the uptake of calcium bymitochondria. Cells that received high levels of calcium but no mitochondrialblockers died. Cells that were exposed to high calcium concentrations andmitochondrial calcium blockers lived. Calcium ultimately may ruin mitochondri...

Researchers Announce Breakthrough In Transgenic Animal Technology

... - into the exposed genome of the oocyteresults in uptake of a new, fully heritable, genetic characteristic. The vectorsused build on the work of the late Howard Temin, a UW-Madison researcher who wona Nobel Prize for his work in describing reverse transcription, in which RNA isused as a template for copyin...

New Discovery Offers Hope For Controlling Cholesterol, Atherosclerosis

...covered protein is directlyinvolved infacilitating uptake of dietary lipids and offers a better target for drugs tocombat obesityand heart disease. The finding is detailed in both the web and Dec. 22 print editions of thepeer-reviewedjournal Biochemistry, published by the American Chemical Society, the worl...

Search For Iron Transport Mechanism Leads To "Hephaestus," God Of Metal Working,Who Insight Into Iron-Deficiency Anemia

...tified one of the key components of the whole iron uptake system,"said the lead author of the study, Christopher Vulpe, MD, PhD, who led the studyas a postdoctoral fellow in the laboratory of Jane Gitschier, PhD, a professorof medicine and pediatrics at UCSF, a Howard Hughes Medical InstituteInvestigator an...

Researchers isolate gene that helps plants take in iron from soil

...such as the leaves orfruits, or may be involved in uptake of other metals such as copper.Manipulating these genes could boost "green" technologies such asphytoremediation, a method of removing pollutants from industrial wasteland bygrowing plants on it. The work by the U.S.-based team was funded by the Nat...

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