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Tag: "when" at biology news

First-ever Compounds To Target Only Metastatic Cells Are Highly Effective Against Breast, Prostate, And Colon Cancers

...usive. However, a new avenue of research opened up when Dr. Huang's team noticed that the Streptomyces bacterium -- the bug that gives us the antibiotic streptomycin -- also produces a natural compound called migrastatin, which appears to inhibit cell migration. Natural migrastatin's effect is relatively...

Discovery of key protein's shape could lead to improved bacterial pneumonia vaccine

...r shape. It also can show how thatshape can change when the protein interacts with another molecule.“This work required that we develop new NMR methods in order todetermine the shape of this protein, which undergoes changes as itinteracts with pIgR,?said Rensheng Luo, Ph.D., a post-doctoral fellowin St. J...

Critical role in programmed cell death identified

...scientists know exactly which cells are dying, and when and where. During development, 1,090 cells form, b...ath defect die. The researchers demonstrated that when they cause worm mitochondria to fragment without instructing cells to die, the cells still die and w...

Study: Soap And Water Work Best In Ridding Hands Of Disease Viruses

...ime, too, the UNC researchers tested what happened when people cleaned their hands for only 10 seconds, Sickbert-Bennett said. That represented the average length of time researchers observed busy health-care personnel washing or otherwise disinfecting their hands at work. "Previous studies have had peop...

New comparative toxicogenomics database

...r shape. It also can show how thatshape can change when the protein interacts with another molecule.“This work required that we develop new NMR methods in order todetermine the shape of this protein, which undergoes changes as itinteracts with pIgR,?said Rensheng Luo, Ph.D., a post-doctoral fellowin St. J...

Taking Aim With Nanoparticle PEBBLEs

...d others to deliver a deadly cargo to cancer cells when triggered by exposure to light. Unlike chemotherapy drugs that attack tumors by invading cancer cells and disrupting their DNA, PEBBLEs never enter the cells they target. Instead, they attach to the outside of the targeted cell and shoot reactive ox...

ASU researchers finds novel chemistry at work to provide parrot's vibrant red colors

...nary novelty, and one we should carefully consider when we think about why parrots are so strikingly colorful," McGraw said. McGraw has been studying the colors of birds for seven years. He first became interested in the behavioral significance of bird colors as a form of visual communication within a sp...

Genetically modified natural killer immune cells attack, kill leukemia cells

... NK cells so that they would become potent killers when they encountered leukemic cells. In order to grow large populations of NK cells, the team started with samples of blood containing a variety of different immune system cells. They placed this sample into a dish containing a type of human leukemia ce...

Transport System Smuggles Medicines Into Brain

...nary novelty, and one we should carefully consider when we think about why parrots are so strikingly colorful," McGraw said. McGraw has been studying the colors of birds for seven years. He first became interested in the behavioral significance of bird colors as a form of visual communication within a sp...

Scientists develop new color-coded test for protein folding

...veloped a simple test that instantly changes color when a protein molecule attached to a gold nanoparticle...is a simple and inexpensive sensor for determining when a protein changes its conformation," said study co-author Richard N. Zare, the Marguerite Blake Wilb...

Placenta Is A Rich Source Of Blood Stem Cells

...cells and can give rise to a complete blood system when transplanted into an adult. Unlike other sites where blood stem cells are found during embryonic development, such as the liver, the stem cells in the placenta can increase in number without giving rise to mature, specialized cells. ''There must be ...

Highly adaptable genome in gut bacterium key to intestinal health

...ts more than a quarter of its genes into high gear when its host's diet changes from sugar to complex carb... Center for Genome Sciences. "Instead of dying off when its usual source of food is gone, B. theta has evolved an elaborate mechanism for sensing changes in...

Amino acids in nectar enhance butterfly fecundity: A long awaited link

...itrogen poor larval food conditions laid more eggs when fed nectar containing amino acids. These results provide the long missing evolutionary link between costly nectar amino acid production by plants, nectar preferences of and fitness benefits to butterflies. This article by Jovanne Mevi-Schütz and And...

Same mutation aided evolution in many fish species, Stanford study finds

...on into today's broad spectrum of shapes and sizes when the last Ice Age ended roughly 10,000 years ago. B...ish quickly evolved into such distinct populations when they colonized new freshwater lakes and streams, they are an ideal model for understanding how anima...

Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

...ng on islands free of predators began disappearing when fur traders started introducing foxes onto islands...ractice escalated between the 1890s and the 1930s, when the U.S. government worked to establish fox farming businesses on the islands. Mostly arctic foxes a...

Gene Therapy For Parkinson's Disease Moves Forward In Animals

...y to treat the devastating side effects that occur when treating the disease in its later stages. By inse... which carries messages that tell the body how and when to move. In tests with 31 monkeys, including a control group, scientists inserted copies of a gene t...

Researchers trace evolution to relatively simple genetic changes

...ne fish colonized new freshwater lakes and streams when the last ice age ended 10,000 to 15,000 years ago....at happens to the ectodysplasin signaling molecule when its gene is mutated in humans, and in fish, shows a major difference. The human protein suffers "a h...

Scientists reveal molecular secrets of the malaria parasite

...omplex life cycle is helping researchersunderstand when different genes switch on and off as the pathogens...ccines that would impede the parasiteduring stages when it is particularly vulnerable to intervention. "We hope this project will help vaccine researchers ...

Octopuses occasionally stroll around on two arms, UC Berkeley biologists report

...ne fish colonized new freshwater lakes and streams when the last ice age ended 10,000 to 15,000 years ago....at happens to the ectodysplasin signaling molecule when its gene is mutated in humans, and in fish, shows a major difference. The human protein suffers "a h...

Studies reveal methods viruses use to sidestep immune system

... RIG-I, turns on a cascade of host immune defenses when the hepatitis C virus (HCV) replicates in cultured human cells. Those immune defenses should fight off the virus, but in a separate study, scheduled to appear online this week and in an upcoming issue of the Proceedings of the National Academy of Sc...

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