THE CHANG LAB

Media and News

  • Smart probiotics: Wiring friendly bacteria to take out disease
    Jun 3, 2015 / New Scientist
    MATTHEW WOOK CHANG has opened an academy for assassins. His trainees are deadly. By rewiring the genes of the common gut bacterium Escherichia coli, Chang has created a killer that can detect, chase down and destroy microbes that make us sick.
    His primary target is Pseudomonas aeruginosa, a bacterium that seizes any chance to infect people with weak immune systems. It can wreak havoc in hospital wards, in the lungs of those with cystic fibrosis, and in the guts of premature babies. In 2013, Chang put his assassins through their paces in a lab flask. They have since been hanging out in the guts of mice, keeping them safe. “We’re about to wrap up animal studies,” he says. “The survival rate of the mice was significantly increased.” He is now training up assassins for other ...
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  • Set a thief…
    Genetically engineered bacteria can be used to attack other bacterial species
    Oct 12, 2013 / The Economist
    BIOFILMS are a problem in medicine. When bacteria gang up to form the continuous sheets that bear this name they are far harder to kill with antibiotics than when they just float around as individual cells. Biofilms on devices such as implants are thus difficult to shift, and those growing on the surfaces of human organs are frequently lethal. But Matthew Chang, a biochemical engineer at Nanyang Technological University in Singapore, has worked out a new way to attack them. His weapon is a different type of bacterium, which he has genetically engineered into a finely honed anti-biofilm missile.
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  • Scientists develop reprogrammed E. coli to treat resistant infections
    Oct 8, 2013 / Vaccine News Daily
    Researchers developed a new type of E. colibacteria to kill off tough-to-treat infections in the lungs, the bladder and on implanted medical devices, according to a study recently published in ACS Synthetic Biology.
    Matthew Wook Chang from Nanyang Technological University in Singapore and his colleagues reprogrammed E. coli to kill off a group of bacteria known as biofilms. Biofilm infections occur when bacteria hide away under a protective barrier of DNA, proteins and sugars that make them resistant to conventional therapies.
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  • Ready, aim, fire! E.coli reprogrammed to target biofilms
    Oct 7, 2013 / Food Quality News
    Researchers reprogrammed the bacterium to specifically recognize, migrate toward, and eradicate both dispersed and biofilm-encased pathogenic Pseudomonas aeruginosa cells.
    Pseudomonas aeruginosa is an environmental bacterium which can be found in food such as vegetables and drinking water, according to the Drinking Water Research Foundation (DWRF).
    Matthew Wook Chang et al explained that the biofilm infections are difficult to treat because the bacteria hide away under a protective barrier of sugars, DNA and proteins which makes them very resistant to conventional therapies.
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  • Recruiting E. coli to combat hard-to-treat bacterial infections
    Oct 02, 2013 / Science Daily
    The notorious bacteria E. coli is best known for making people sick, but scientists have reprogrammed the microbe -- which also comes in harmless varieties -- to make it seek out and fight other disease-causing pathogens. The researchers' report appears in the journal ACS Synthetic Biology and describes development of this new type of E. coli that can even kill off slimy groups of bacteria called biofilms that are responsible for many hard-to-treat infections, such as those that take hold in the lungs, the bladder and on implanted medical devices.
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  • Less Harmful Strains of E. Coli Help Kill off Biofilms
    Oct 02, 2013 / Science World Report
    Escherichia coli (E. coli) bacteria commonly lives in the intestines of healthy individuals, and though most varieties of the bacteria are harmless, a few particularly nasty strains can cause especially unpleasant symptoms ranging from severe abdominal cramps to vomiting or bloody diarrhea.
    Yet a recent study looks at less harmful strains of E. coli that can help fight off more deadly bacterial infections. Scientists worked to reprogram the microbe that comes from the strain in order to fight off biofilms that are responsible for many hard-to-treat infections that may actually take root in the lungs, bladder or even implanted medical devices.
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  • Wow of the week: With a little bioengineering, E. coli becomes a pathogen-fighting superhero
    Sep 14, 2013 / MedCity News
    Scientists in Singapore think there might be a way to fight microorganisms that cause infection with, well, other microorganisms that cause infection.
    Synthetic biologist Matthew Chang and his colleagues at Nanyang Technological University in Singapore bioengineered E. coli bacteria in a way that causes them to hunt down and kill the gram negative bacterium Pseudomonas aeruginosa. It’s a frequent cause of hospital-acquired infections like pneumonia and bloodstream infections.
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  • Engineered bacterium hunts down pathogens
    E. coli microbe seeks out and destroys invaders without harming helpful bacteria.
    Sep 11, 2013 / Nature News
    In the war against infection, medicine needs a hero. Meet the bioengineered bacterium that can hunt down pathogens and destroy them with a powerful one–two punch.
    Synthetic biologist Matthew Chang at Nanyang Technological University in Singapore has armed Escherichia coli bacteria with a ‘seek and kill’ system that targets cells of Pseudomonas aeruginosa, an invasive bacterium that causes pneumonia and other illnesses1. In preliminary tests with infected mice, the modified bacterium left a trail of dead P. aeruginosa in its wake.
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  • Engineered yeasts gain ability to pump out alkanes
    Feb 27, 2013 / Crop Biotech Update
    In Singapore, researchers from Nanyang Technological University have introduced molecular pumps into genetically engineered yeast Saccharomyces cerevisiae that allowed it to extrude the alkane that it produced. This mechanism called efflux pump system could alleviate the problem of alkane toxicity in yeast which limits the productivity of yeast-based alkane production system.
    Akane is a hydrocarbon component of gasoline fuels that can be biologically produced in microbial hosts like S. cerevisiae but it is known to be toxic to S. cerevisiae.
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  • Engineered bacteria armed to fight infection
    Aug 17, 2011 / ABC
    Scientists have taken a common bacteria found in the body and engineered it to a form that will seek out and destroy a potentially harmful microbe.
    The team at the Nanyang Technological University in Singapore has designed harmless E. coli (Escherichia coli) bacteria that are able to detect and kill another bacteria called Pseudomonas aeruginosa which is a serious problem to some hospital patients.
    The work, which is published this week in Molecular Systems Biology, is an example of the emerging field of synthetic biology - in which researchers use engineering principles to design novel living systems.
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  • Experts redesign common microbe to fight drug-resistant bacteria
    Aug 16, 2011 / Reuters
    Researchers in Singapore have re-engineered a harmless strain of bacteria to fight another common, drug-resistant microbe that spreads in hospitals and is deadly to patients with weak immune systems.
    To fight the Pseudomonas aeruginosa bacterium, the scientists used a strain of the E.coli bacteria that is normally present in the human gut.
    They inserted into E.coli foreign DNA fragments that empowered it to sense the offending pathogen and quickly produce and release a deadly toxin.
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  • Set a bug to kill a bug
    Aug 16, 2011 / Nature News
    Engineered bacteria that can detect and kill human pathogens could provide a new way to treat antibiotic-resistant bacteria. Using the tools of synthetic biology, researchers have given bacteria therapeutic properties unseen in any natural strain — although they won't be injected into people any time soon.
    "Our study is the first example of how synthetic biology will be useful for fighting bacterial infections," says biochemical engineer Matthew Chang, an author on the paper, which is published today in Molecular Systems Biology.
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  • Scientists engineer suicide bomber bacteria to kill other bacteria
    Aug 16, 2011 / Discover
    In a lab in Singapore, scientists are designing and breeding suicide bombers. If their efforts pan out, they will be applauded rather than jailed, for their targets are neither humans nor buildings. They’re bacteria.
    Nazanin Saeidi and Choon Kit Wong have found a new way of killing Pseudomonas aeruginosa, an opportunistic species that thrives wherever humans are weak. It commonly infects hospital patients whose immune systems have taken a hit. It targets any tissue it can get a foothold on – lungs, bladders, guts – and it often causes fatal infections. To seek and destroy this threat, Saiedi and Wong have used the common lab bacterium Escherichia coli as a sacrificial pawn.
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  • Suicide-Bombing Bacteria Could Fight Infections
    Aug 16, 2011 / Science
    Like any good military unit, infectious bacteria have access to numerous weapons and efficient communication systems. But like soldiers in the field, they're also susceptible to suicide bombers. Researchers have used the tools of synthetic biology to create an Escherichia coli cell that can infiltrate foreign bacteria and explode, killing off the pathogens along with itself.
    The project, says bioengineer Chueh Loo Poh of Nanyang Technological University in Singapore, was "inspired by nature," particularly by quorum sensing, the ability of some bacteria to detect the number of microorganisms—either of their own species or others—in their environment.
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  • killingbugs
    Bacteria against bacteria
    West Germany Broadcasting
    (Featured by TV documentary “The world of bacteria: We need them and they need us”).
    > Watch it now