Rainforest plant combats multi-resistant bacterial strains
Indian medicine combats multi-resistant bacterial strains
"I have discovered a natural substance in a Chilean avocado plant that is active in combination treatment with traditional antibiotics. Resistant bacteria have an efflux pump in their bacterial membrane that efficiently pumps out antibiotics as soon as they have gained access. The identified natural substance inhibits the pumping action, so that the bacteria’s defence mechanisms are broken down and the antibiotic treatment allowed to work," explains Jes Gitz Holler.
Jes Gitz Holler gathered specimens of the plant, which comes from the Persea family, in Chile, where the Mapuche people use the leaves of the avocado plant to heal wounds. The results have been published in Journal of Antimicrobial Chemotherapy.
Synthetic chemistry for sustainable production
The so-called MIC value is the lowest possible concentration of an antibiotic that inhibits the bacterial growth. With his compound from the medicine chest of the Mapuche people, Jes Gitz Holler can lower the MIC value by at least eight times:
"The natural compound has great potential and perhaps in the longer term can be developed into an effective drug to combat resistant staphylococci. At this time there are no products on the market that target this same efflux-inhibitor mechanism. We want to improve the active substance using synthetic chemistry in the laboratory. That will also ensure sustainable production of a potential drug while protecting rainforest plants," continues Jes Gitz Holler.
Jes Gitz Holler emphasises that a commercial product will benefit the Mapuche people. At present there is a written agreement between the Faculty of Health and Medical Sciences and the representative of the Mapuche people, Alfonso Guzmán, PhD, who helped procure the plant material.
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