Scientists are collaborating on a new international research project to identify antibiotics that can kill tuberculosis and fight resistant strains. "We want to accelerate the discovery of new compounds that can be turned into effective drugs," said Professor Tony Maxwell from the John Innes Centre, a key player in "More Medicines for Tuberculosis," a new European-centered research project. Two billion people are currently infected with TB and three million die every year. TB causes more deaths than any other infectious disease. Rates are increasing, especially in sub-Saharan Africa, where people with HIV are particularly vulnerable. It is also associated with intravenous drug use and increased rates may be linked to immigration. "The bacterium is difficult to get at," said Professor Maxwell. "It is slow growing, spends a lot of time hidden in cells before it makes itself known, and has very tough cell walls of its own." Treatment is relatively long term, requiring a drug regimen over four to six months. Non-compliance is a problem, exacerbating the challenge caused by resistant strains. "Drug discovery research for tuberculosis is dependent on academic labs and no single lab can do it," said Professor Maxwell. Scientists from 25 labs across Europe will collaborate on the new project as will some groups in the US and India. The John Innes Centre scientists will focus on compounds that target DNA gyrase, a target that they have already established as effective and safe. They will receive compounds from European collaborators including AstraZeneca. They will screen those that knock out DNA gyrase. Their research will continue on those compounds that are effective both against the target (DNA gyrase) and the bacterium.
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