Mystery still surrounds why women who recover from breast cancer often relapse years later —Dr Marie-Liesse Asselin-Labat is hoping to use her knowledge of breast tissue stem cells to unravel it.
In 2006, she was part of the Walter and Eliza Hall Institute team that discovered breast stem cells.
She then built on this finding with a series of studies exploring how these cells develop and are influenced by oestrogen and other steroids.
Her achievements won her a $20,000 L’Oréal Australia For Women in Science Fellowship in 2010. Breast stem cells are critical to normal breast development, but if the breast becomes cancerous they are also likely to be at heart of the problem.
And that’s been the focus of Marie- Liesse’s work. In a series of high impact papers working with mice, she has explored how these breast stem cells develop into the wide range of cells found in a normal breast and how some of them become aggressive cancer cells.
In 2010 she was lead author of a Nature paper revealing that oestrogen and other steroids can control the function of breast stem cells. “It’s via an indirect mechanism important in understanding how stem cells proliferate, and it could lead to new treatments and new drugs,” she says. “But there are basic questions we still need to answer about breast cancer—such as, ‘What is the cell of origin?’ and ‘What causes a cell to go wrong and turn to cancer?’”
Making cement is the third largest source of carbon emissions in the world after the burning of fossil fuels and deforestation—but the Australian roads of the future could be paved with cement that is made in a process that generates less than half the carbon emissions of traditional methods.
Each year, the world produces about 12 billion tonnes of concrete and about 1.6 billion tonnes of its key ingredient, Portland cement, which is generated by breaking calcium carbonate into carbon dioxide and calcium oxide.
This produces some 2 billion tons of carbon dioxide—so the Geopolymer and Mineral Processing Group (GMPG) at the University of Melbourne, now led by Dr John Provis, went looking for a lower carbon way of making cement.
They have now developed binders and concretes based on a low-CO2 aluminosilicate compounds called geopolymers.
Seabirds on one of Australia’s remotest islands have plastic in their stomachs.
A recent survey found more than 95 per cent of the migratory flesh-footed shearwaters nesting on Lord Howe Island, between Australia and the northern tip of New Zealand, had swallowed plastic garbage.
As if that wasn’t bad enough, plastic has been shown to bind poisonous pollutants. As a result, some shearwaters were found with concentrations of mercury more than 7,000 times the level considered toxic.
The Bill and Melinda Gates Foundation are supporting the efforts of Queensland University of Technology scientists to design a better banana.
The researchers have already added provitamin A—a compound the body converts to Vitamin A—to the East African Highland banana. Now they are working to boost the iron content of the cooking banana that is a staple food of Uganda.
Led by Prof James Dale, director of University’s Centre for Tropical Crops and Biocommodities, the researchers are working with the Ugandan National Agricultural Research Organisation to modify the bananas genetically to raise their micronutrient levels, and then develop disease-resistant strains to distribute to East African farmers. The research is being funded by a $10-million grant from Bill and Melinda Gates Foundation’s Grand Challenges in Global Health Program.
James and his team developed efficient technology for raising nutrient levels in Cavendish bananas through to field trials in Queensland and then transferred it to Uganda. Ugandan scientists are now using these methods to modify East African Highland bananas genetically to increase their biosynthesis of provitamin A and their accumulation of iron.
Part of the project includes ensuring Ugandans will accept the new fruit, which has deep yellow flesh, thanks to the addition of the Vitamin A precursor, beta-carotene.
The first Australian trials have started of a vaccine to prevent koalas from contracting and spreading the deadly sexually transmitted disease, chlamydia.
The trials—supervised by Prof Peter Timms and Prof Ken Beagley from Queensland University of Technology (QUT)’s Institute of Health and Biomedical Innovation—have been undertaken safely both in healthy koalas and koalas that already have chlamydial disease. All vaccinated koalas developed a good immune response to the anti-chlamydia vaccine, which shows great promise of making a significant impact on the disease in the near future.
Chlamydia is a major threat to the continued survival of koalas. Almost all populations in Australia are affected by the disease. It is a significant cause of infertility, urinary tract infections, and inflammation in the lining of the eye which often leads to blindness.
Koala numbers are declining across virtually its whole range. In the Koala Coast region of southeast Queensland in 2008 it was estimated that 2332 koalas had been lost in a three-year monitoring period. That represented a 51 per cent decrease.
By studying chlamydial disease in koalas, QUT researchers hope to understand the condition better in general. They believe their work may also hold the key to developing a successful vaccine for use against the human sexually transmitted disease Chlamydia trachomatis, a major cause of infertility in women.
Photo: Professor Peter Timms is trialling a Chlamydia vaccine for koalas.
A Queensland University of Technology (QUT) engineer is developing techniques to automatically identify people in surveillance videos and recognise their movement and behaviour.
The explosion of video surveillance to make public places safer, says Dr Clinton Fookes of the University’s School of Engineering Systems, has created a new challenge for researchers—to make sense of what cameras and computers see. So he is investigating ways to extract and interpret important information from these visual sources.
The data generated by the proliferation of surveillance cameras, as well as the countless images and videos online, he says, are impossible to intelligently use without sophisticated computer vision technology that can automatically extract information from these sources, collate and report on it in real time.
As Clinton’s work is ideally suited to improving security in public places such as airports, one of his roles is technical director of QUT’s Airports of the Future—a major research project aimed at improving the experience of passengers passing through Australia’s airports.
His research in this field could lead to new discoveries in a range of areas including human-computer interaction, security, medical imaging and robotics.
Photo: Clinton Fookes is technical director of QUT’s Airports of the Future.
New glasses that slow the progression of short-sightedness or myopia are now available. The glasses which incorporate a novel lens design could potentially benefit some of the 3.6 million Australians with myopia and hundreds of millions of people worldwide.
Until now, correcting myopia has relied on measuring the clarity of vision at the very centre of the retina. Corrective lenses were designed to provide the wearer with clear central vision but did nothing for peripheral vision. Studies have now shown that short-sightedness progressively worsens in spite of correction using these traditional lenses.
A sponge that filters hot air and captures carbon dioxide
We need better ways of capturing carbon dioxide emissions from power stations and industry. And we won’t be using hydrogen cars until we’ve developed practical ways of carrying enough hydrogen gas in the fuel tank. Deanna D’Alessandro’s understanding of basic chemistry has led her to create new, incredibly absorbent chemicals that could do both these jobs and much more.
It’s all to do with surface area. Working in California and in Sydney she has constructed crystals that are full of minute holes. One teaspoon of the most effective of her chemicals has the surface area of a rugby field. What’s more, the size and shape of the pores can be customised using light. So she believes she can create molecular sponges that will mop up carbon dioxide, hydrogen, or in theory almost any gas – and then release it on cue. Continue reading Mopping up gases→
The Australian National University, Canberra/The University of Melbourne
In the 1950s it seemed as if medical science was winning the fight against malaria with the help of the ‘wonder drug’ chloroquine. Over the past half century the drug has saved hundreds of millions of lives.
But now the parasite that causes malaria has fought back. Chloroquine-resistant malaria has become common in developing countries. Rowena Martin is working to understand what happened, and to develop new ways of treating malaria. Continue reading Fighting back against malaria→
Walter and Eliza Hall Institute of Medical Research
Most women in Australia who have breast cancer recover. But many then relapse years later.
Marie-Liesse Asselin-Labat wants to know why. If she can solve this mystery, her work will open up opportunities for new drugs and treatments. Her achievements to date suggest that she is well placed to succeed.
In 2006 she was part of the Walter and Eliza Hall Institute of Medical Research team that received global attention for its discovery of breast stem cells – a significant step in understanding how breast cancer starts. Marie-Liesse built on this finding with a series of papers exploring how these cells develop and are influenced by oestrogen and other steroids. Continue reading How does breast cancer start?→
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