review · Molecules
Infectious diseases cause roughly sixteen million deaths each year, with at least sixty-five per cent of these conditions linked to microbial communities forming biofilms. The widespread overuse of conventional antibiotics has driven the emergence of multidrug-resistant bacterial strains, creating an urgent need for non-antibiotic treatment strategies. Quorum sensing represents a population density-dependent communication mechanism used by both Gram-negative and Gram-positive bacteria. Driven by diffusible chemical signals known as autoinducers, quorum sensing controls biofilm development and the expression of bacterial virulence factors. Disrupting this communication network offers a promising alternative to combat resistant pathogens. Agents that interfere with bacterial signalling, notably quorum sensing inhibitors and quorum quenching enzymes, present a non-traditional method to prevent and manage bacterial infections without relying on standard antibiotic pathways.
Bacterial resistance to standard antibiotics poses a severe threat to global healthcare, contributing to millions of deaths annually. Because existing medicines increasingly fail against resistant strains protected by biofilms, exploring mechanisms that disrupt bacterial communication rather than directly killing the microbes provides a vital framework for developing new treatments against hard-to-treat infections.
The described approach could guide pharmaceutical developers in creating alternative anti-infective products based on quorum sensing inhibitors and quorum quenching enzymes. Target users would be clinicians managing biofilm-related or multidrug-resistant infections. However, the abstract describes conceptual mechanisms and strategies rather than experimental testing or product formulation, indicating that practical applications remain at an early research stage.
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Antibiotic resistance is a major problem and a major global health concern. In total, there are 16 million deaths yearly from infectious diseases, and at least 65% of infectious diseases are caused by microbial communities that proliferate through the formation of biofilms. Antibiotic overuse has resulted in the evolution of multidrug-resistant (MDR) microbial strains. As a result, there is now much more interest in non-antibiotic therapies for bacterial infections. Among these revolutionary, non-traditional medications is quorum sensing inhibitors (QSIs). Bacterial cell-to-cell communication is known as quorum sensing (QS), and it is mediated by tiny diffusible signaling molecules known as autoinducers (AIs). QS is dependent on the density of the bacterial population. QS is used by Gram-negative and Gram-positive bacteria to control a wide range of processes; in both scenarios, QS entails the synthesis, identification, and reaction to signaling chemicals, also known as auto-inducers. Since the usual processes regulated by QS are the expression of virulence factors and the creation of biofilms, QS is being investigated as an alternative solution to antibiotic resistance. Consequently, the use of QS-inhibiting agents, such as QSIs and quorum quenching (QQ) enzymes, to interfere with QS seems like a good strategy to prevent bacterial infections. This review sheds light on QS inhibition strategy and mechanisms and discusses how using this approach can aid in winning the battle against resistant bacteria.
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DOI: 10.3390/molecules29153466
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