Tag: "classic" at biology news

Study shows lizard moms dress their children for success

...ects were inhibited by yellow genes. "This is a classic example of an interaction between genes and environmental influences on traits," Lancaster said. "Females provide an estradiol-rich prenatal environment to their entire clutch, but different progeny respond to it in different ways depending on which ...

Surprising origin of cell's internal highways

...vision by altering microtubule dynamics. "Many classic chemotherapy strategies affect microtubules, although it's not quite clear how these drugs influence cancer cells differently than normal cells," said Kaverina. "Both microtubule regulation of proliferation and microtubule regulation of migration and...

Technique monitors thousands of molecules simultaneously

...offered the Great Wall of China as an example of a classic logistics problem ?the structure itself was simple, but getting the tools and manpower necessary for the task to the remote regions it was built in on the scale necessary was "a logistical nightmare." Getting 12,000 electrodes per square centimeter...

The quest for an effective HIV vaccine presents new possibilities, challenges

... thwarted scientists?efforts thus far to develop a classic preventive vaccine for the virus because of its ability to integrate into target cells and evade clearance by the immune system. The interaction between HIV and the immune system is complex, and how different HIV-specific immune responses help to con...

In obesity, brain becomes 'unaware' of fat

...ot doing its job,?Cowley said. “It’s an example of classic hormone resistance.? Cowley’s group set out to show exactly where that breakdown occurs. The researchers fed mice a high-fat diet for 20 weeks, a long time for the mice, which live only for a couple of years. For reasons that remain unclear, some o...

Gene found for rare disorder may reveal new pathway in mental retardation

...al height, whereas only 5 percent of patients with classic CdLS achieve normal height. The patients with the SMCIA and SMC3 mutations had milder versions of the distinctive facial features found in classical CdLS, such as thin eyebrows that join together, long eyelashes, thin lips and excessive body hair. ...

'Guardian of the genome' protein found to underlie skin tanning

...that it occurs as a result of stress, and p53 is a classic 'stress' protein, going into action when cells experience stress-related DNA damage. What we've learned about p53 suggests that it may trigger the hyperpigmentation process." There is even the possibility that p53 protects against skin damage in a...

UBC researchers reveal dwarf aquatic plants' hidden ancestry

... misunderstandings in botanical history. "It’s a classic case of mistaken identity," says Sean Graham, an associate professor and researcher with the UBC Botanical Garden and Centre for Plant Research in the Faculty of Land and Food Systems. "And it took DNA sequence evidence coupled with a critical re-exa...

Making mice with enhanced color vision

... To address this question, the researchers used a classic preference test; mice set before three light panels were trained to touch the one panel that appeared to differ from the other two. A correct answer was rewarded with a drop of soy milk. To circumvent thorny issues related to the subjective natur...

Microbes compete with animals for food by making it stink

...ogens in ecological communities. But their role as classic consumers who produce chemicals to compete with larger animals could be an important and common interaction within many ecosystems -- and one that scientists often overlook, according to the authors of a paper published this week in the journal Ecolo...

Weighty viruses

...he special structure of the ion trap; instead of a classic quadrupole ion trap, Chang and co-workers chose to use a cylindrical ion trap (CIT). In this type of trap, the movement of the trapped ions is considerably more complex and not mathematically ascertainable. However, it has the advantage of a much sim...

First major study of mammalian 'disorderly' proteins

...d transmitting signals within them." Unlike the classic description of proteins described in science textbooks, IUPs are not completely locked into rigid, 3-D shapes that determine their function in the cell. Instead, IUPs have varying amounts of flexibility within their sometimes spaghetti-like structure...

Researchers in Montréal and the US create model of key immune-system component

...s Drosophila," Dr. Stuart continues. "By combining classic cell biology with the newer approaches of proteomics, functional genomics and computational analysis, we have generated a model of that we believe will facilitate our understanding of infectious diseases and expedite the development of new strategies...

'Allergy cells' can aggravate cancer and psoriasis

...se of a number of substances that give rise to the classic allergic symptoms, such as swelling, congestion and itching. The explosive reactions are activated when an allergen (such as pollen particles) binds to receptors on the surface of the mast cell, which then opens and secretes part of its contents. I...

Leading reason for corneal transplants comes into focus

...ite slightly different symptoms. "I knew it wasn't classic Fuchs, but rather something new," remembers Gottsch. "In the end, it wasn't Fuchs at all, but a sort of mutated distant cousin of the disease. It made me wonder, however, if there were more genetic variants of the disease out there." He stopped wo...

Squid-inspired design could mean better handling of underwater vehicles

...echnology - seemingly inspired by the plots of two classic sci-fi films - may soon allow doctors to guide tiny capsules with jet thrusters through the human digestive tract, enabling them to diagnose disease and dispense medications. Kamran Mohseni, an assistant professor of aerospace engineering sciences...

Worms produce surprise insight into human fever

...e immunity plus a surprising insight into another classic metazoan response to infection fever. The first pathway was p38 MAPK/CED-3, which is also required for the activation of programmed cell death under certain stresses. The other was a heat shock transcription factor-1 (HSF-1) pathway, which is ...

Newly discovered behavior in cancer cells signals dangerous metastasis

... produces dictate which way the cell shifts. In a classic example of survival of the fittest, a cancer cell's ability to toggle between epithelial and mesenchymal enables the most malignant cells to aggressively invade and then peacefully adapt in unfamiliar territory, the scientists said. "The prevailing ...

Paramecia adapt their swimming to changing gravitational force

...ng in water, the force is always against them. The classic example is the slipper-shaped paramecium, which consistently swims harder going up than going down, just to keep from sinking. Now physicists Karine Guevorkian and James Valles of Brown University have worked out a way to turn gravity on its head and...

History-hunting geneticists can still follow familiar trail

...ntly some scientists have raised doubts about this classic genetic system to study ancient migrations of people and to estimate the populations of people or animals as they existed tens of thousands of years ago. But University of Florida researchers writing this month in an online edition of Science vali...

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