Wednesday, June 3, 2009

Mechanism of Antibiotic Resistance Explained !

We all know that the introduction of antibiotics as drugs in the treatment of bacterial infections in the post-WWII years was a revolutionized medicine, and dramatically improved the health condition on a global scale. 60 years later now, the growing antibiotic resistance among pathogens has heavily depleted the arsenal of entailed effective antibiotic drugs and especially in the case of TB, combination of 4 drugs is being used and don't know what happens ?. Now thanx to Prof. Måns Ehrenberg for his novel discovery i.e., inhibiting the "drug efflux pumps" in bacteria, which function as their defence mechanisms against antibiotics, can mask the effect of mutations that have led to resistance in the form of low-affinity drug binding to target molecules in the cell. This is shown by researchers at Uppsala University in a new study that can provide clues to how the development of resistance to antibiotics in bacteria can be delayed.

This new study, experimentally and theoretically explained how the inhibition of these drug efflux pumps can completely mask the resistance effect of mutations that reduce the affinity of antibiotics to their target molecules in the bacteria cell. The effect of the mutations is entirely hidden when the pumps are unable to remove the antibiotic sufficiently quickly in relation to the dilution of the antibiotic through cell growth and cell division.

A new way for drug discovery....

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