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  • Jab 'protects mice against brain tumours'

    Jab 'protects mice against brain tumours' By Helen Briggs Health editor, BBC News online A malignant brain tumour is a fast-growing cancer that spreads to other areas of the brain and spine
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    Scientists have developed a vaccine that they say provides some protection against brain tumours in mice.
    The vaccine works by boosting the immune system to attack abnormal cells.
    The approach has not been tested on humans, but clinical trials could begin next year in Germany, say researchers.
    Brain tumours are difficult to treat so more research is urgently needed to give patients better options, said a cancer charity.
    Continue reading the main story “Start Quote
    Using the immune system to attack cancer is an exciting approach to tackling the disease and this research is another step forward in finding new treatments”
    Dr Emma Smith Cancer Research UK
    A team at the National Centre for Tumour Diseases in Heidelberg developed a vaccine that targets brain tumour cells.
    It is based on the natural ability of some patients with brain tumours to mount an immune response against the disease - although this is not enough to stop the tumour growing.
    The mouse experiment showed that a vaccine may be able to boost this natural approach, the researchers said.
    "We can induce an immune response that is similar to what we see in some brain tumour patients who have a natural immunity but it is not strong enough to take care of the tumour," said Prof Michael Platten.
    The team is applying for approval to start a human clinical trial in Germany next year.
    'Exciting approach' "It's still too early to know if the vaccine will be efficacious in humans," he added.
    The charity Cancer Research UK described the research, published in Nature, as "exciting".
    "Using the immune system to attack cancer is an exciting approach to tackling the disease and this research is another step forward in finding new treatments," said Dr Emma Smith, senior science information officer.
    "But this is a very early-stage study and was carried out in mice, so much more research is needed before we know if the vaccine is safe or effectively boosts an immune response against brain tumours in people.
    "Brain tumours are a diverse group of cancers and are difficult to treat, so we urgently need more research to give people better options."
    Other researchers around the world are looking into similar vaccines to stimulate the immune system to fight off cancer.
    A trial started in the UK last year into a similar vaccine to fight brain tumours.
    The approach, known as immunotherapy, is also being tested in the US.

  • #2
    Nasa 'flying saucer' tests Mars tech

    Last updated at 22:54 Share this pagePrint
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    Nasa 'flying saucer' tests Mars tech
    By Jonathan Amos
    Science correspondent, BBC News
    Jump media playerMedia player helpOut of media player. Press enter to return or tab to continue.
    Video cameras captured the launch and most of the flight
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    Space - the new rock and roll
    Mars success depends on 'crazy' landing
    A US space agency (Nasa) experiment on Saturday to test future Mars landing technologies proved largely successful.

    A flying saucer-shaped vehicle was sent high into the atmosphere via a balloon to trial a new type of parachute and an inflatable Kevlar ring that could help slow down a spacecraft as it approaches the Red Planet's surface.

    All of the equipment appeared to work apart from the parachute, which failed to deploy fully.

    The experiment was sent up from Hawaii.

    Nasa hopes the lessons learned will enable it put heavier payloads on Mars in the decades ahead.

    The current limit is about one-and-a-half tonnes.

    Low Density Supersonic Decelerator (LDSD)
    Artist's impression: A rocket motor was used to shoot the vehicle up through the stratosphere
    If humans are ever to go to the planet, this mass capability will have to rise to well beyond 10 tonnes.

    Saturday's test vehicle, known as the Low Density Supersonic Decelerator (LDSD), ditched in the Pacific after its flight.

    Teams were despatched to try to locate the demonstrator so that its data recorder could be recovered.

    This will give engineers the most detailed information on what precisely happened during the experiment.

    Video cameras on the ground and on the LDSD captured most of the flight.

    The helium balloon was launched from the US Navy's Pacific Missile Range Facility in Kauai at just after 08:40 local time (18:40 GMT).

    It took over two hours to raise the saucer-shaped vehicle to roughly 35km (120,000ft), whereupon it was released.

    A rocket motor then kicked the LDSD on up through the stratosphere to above 50km (160,000ft), and to a velocity of Mach 4 (four times the speed of sound) - the sort of conditions a spacecraft approaching Mars might encounter.

    Balloon
    The LDSD was released almost three hours after its carrier balloon left the ground
    As the vehicle began to slow, it deployed the first of its two new atmospheric braking systems.

    This first system was a 6m (20ft) inflatable "doughnut". It enlarged the LDSD's girth and so will have slowed the saucer further by increasing the amount of drag it experienced.

    The second braking system, however, did not come out properly.

    Upward-looking video showed the 30m-diameter supersonic parachute failing to unfurl correctly.

    Nasa engineers said before the test that they would gather valuable data whether the technologies on the LDSD worked properly or not.

    The project hopes to return to Hawaii next year to conduct two further test flights.

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