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Scientists from the University of Illinois Chicago and Harvard University have announced the development of a potent new antibiotic that could revolutionize the fight against drug-resistant bacteria.
Called cresomycin, this synthetic antibiotic has shown remarkable efficacy in suppressing pathogenic bacteria that have evolved resistance to commonly prescribed antimicrobial drugs.
Scientists Develop New Antibiotic to Combat Drug-Resistant Bacteria
Antibiotic Against Drug-Resistant Bacteria
The study, published in the journal Science, identifies cresomycin as a promising solution in the fight against antibiotic resistance, a growing global health threat. Dr. Yury Polikanov, associate professor of biological sciences at UIC, and his Harvard colleagues led the development of cresomycin.
Their long-term partnership has yielded critical insights into cellular mechanisms, laying the groundwork for developing this novel antibiotic.
The study’s central focus is on how bacteria thwart antibiotic action. Many antibiotics target bacteria’s ribosomes, impairing their ability to produce proteins required for survival. However, certain bacterial species have developed resistance mechanisms, such as adding a methyl group to their ribosomes, making antibiotics ineffective.
Making the Antibiotic
Using advanced imaging techniques like X-ray crystallography, the researchers uncovered the intricacies of this resistance mechanism. They discovered that the methyl group not only physically obstructs the binding site of antibiotics on the ribosome but also alters the ribosome’s internal structure, amplifying antibiotic resistance.
With this understanding, the research team engineered cresomycin to circumvent bacterial defenses. Unlike traditional antibiotics, cresomycin is pre-organized to bind tightly to ribosomes, regardless of the presence of methyl groups.
This unique design allows cresomycin to effectively disrupt ribosome function, overcoming resistance mechanisms employed drug-resistant bacteria.
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The Findings
In laboratory experiments conducted at Harvard, cresomycin demonstrated remarkable efficacy against multidrug-resistant strains of common bacterial pathogens such as Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa.
While the findings are encouraging, researchers emphasize the need further to evaluate cresomycin’s effectiveness and safety in human trials. The road to clinical application is paved with rigorous testing to ensure the antibiotic’s efficacy and minimal side effects.
Dr. Polikanov underscores the critical role of structural biology in antibiotic development, stating, “Without understanding how drugs interact with resistant bacterial ribosomes, we would be blind in designing effective treatments.”
The development of cresomycin represents a significant milestone in the fight against antibiotic-resistant bacteria. As the threat of drug-resistant infections looms, innovative solutions like cresomycin offer hope for a healthier future.
The Threat of Antibiotic Resistance
Antimicrobial resistance is a serious threat to global health, with bacterial antimicrobial resistance killing 1.27 million people in 2019 and contributing to another 4.95 million deaths.
Misuse of antimicrobials in humans, animals, and plants contributes to the rise of drug-resistant pathogens, affecting countries worldwide, particularly those with low and middle incomes.
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