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Body uses a 'dual key' system to secure immune system

"Dual key" activation, in which two people must act in concert to launch a weapon, is often installed to safeguard highly destructive arms.

2 Apr 2007

Environmental contamination could affect the evolution of wildlife through changes in mating behavior

Female rats avoid males whose great-grandfathers were exposed to a common fruit crop fungicide, preferring instead males whose ancestors were uncontaminated, researchers from The University of Texas at Austin have discovered.

2 Apr 2007

Bacteria biosensor prototype

Common bacteria with an overt reaction to toxins that cause oxidative stress show promise as a biosensor to predict public health threats.

2 Apr 2007

Xenotransplantation - what are the barriers?

Given the huge shortage of donor organs, researchers have been trying to find ways to transplant animal organs across different species (known as "xenotransplantation"), with the eventual aim of transplanting animal organs into humans.

2 Apr 2007

Scientists invent way to reversibly silence brain cells using pulses of yellow light

Scientists at the MIT Media Lab have invented a way to reversibly silence brain cells using pulses of yellow light, offering the prospect of controlling the haywire neuron activity that occurs in diseases such as epilepsy and Parkinson's disease.

2 Apr 2007

Scientists uncover bacterial cloaking

Scientists have uncovered the workings of a method bacteria responsible for diseases such as meningitis and blood disorders use to hide from the body's immune system.

2 Apr 2007

What forced early hominins onto two legs?

The next time you are struggling to carry your bags home from the supermarket just remember that this could, in fact, be the reason you are able to walk upright on two legs at all!

2 Apr 2007

New insight on tree frog adhesion

Tree frogs have the unique ability to stick to smooth surfaces even when they are tilted well beyond the vertical - some small tree frogs can even adhere when completely upside down.

2 Apr 2007

Scientists create small molecules to probe proteins deep inside cell membrane

Proteins, which form much of the molecular machinery required for life, are the targets of most drug molecules.

2 Apr 2007

Scientists identify how development of different species uses same genes with distinct features

Biologists at New York University have identified how different species use common genes to control their early development and alter how these genes are used to accommodate their own features.

2 Apr 2007

One species of insect shown to deliberately cultivate bacteria in its antennae

Bacteria live in, on and around us and other organisms with sometimes very beneficial results.

2 Apr 2007

Single-walled carbon nanotubes may pose health risks

DNA-wrapped single-walled carbon nanotubes (SWCNTs) shorter than about 200 nanometers readily enter into human lung cells and so may pose an increased risk to health, according to scientists at the National Institute of Standards and Technology (NIST).

2 Apr 2007

Penn State scientists reveal structure of gateways to gene control

Scientists at Penn State University will reveal in the 29 March 2007 issue of the journal Nature the first complete high-resolution map of important structures that control how genes are packaged and regulated throughout an entire genome.

31 Mar 2007

Tiny injected gel particles to help chronic lower back pain

Scientists at The University of Manchester believe injections of tiny sponge-like particles could provide an alternative to major surgery in the treatment of chronic lower back pain.

From The University of Manchester 21 Mar 2007

Nanotechnology reveals hidden fingerprints

Hidden fingerprints can be now be revealed quickly and reliably thanks to two developments in nanotechnology.

14 Mar 2007

Scientists test 'secret weapon' against tumours

Cancer Research UK scientists in Glasgow have devised a new method of attacking cancer cells. They report the findings in the Journal of Clinical Investigation.

11 Mar 2007

When it comes to antioxidants, orange could be the new red!

Scientists say a special variety of orange tomatoes may be healthier than the usual bright red ones.

8 Mar 2007

Drug delivery system that consists of nanocrystals of a hydrophobic drug

The problem of efficiently delivering drugs, especially those that are hydrophobic or water-repellant, to tumors or other disease sites has long challenged scientists to develop innovative delivery systems that keep these drugs intact until reaching their targets.

8 Mar 2007

Improvement of cancer-targeting therapy, using nanocarriers for intractable solid tumors by inhibition of TGF-beta signaling

Administering a small amount of a potent but potentially toxic anticancer agent along with nanoparticles loaded with a second anticancer agent produced a dramatic inhibition of tumor growth in normally intractable cancers. These findings suggest a new approach to treating malignancies such as pancreatic cancer and diffuse gastric cancer.

5 Mar 2007

Magnetic nanocrystals used to carry tumor-killing drugs

Imagine using a focused magnetic field to concentrate anticancer drugs in and around tumors, and then turning off the magnetic field so that the drugs then leave the body.

5 Mar 2007