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Accelerated spread of antibiotic resistance genes (ARGs) induced by non-antibiotic conditions: Roles and mechanisms
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This review examined how non-antibiotic factors, including microplastics, metallic nanoparticles, and non-antibiotic drugs, can accelerate the spread of antibiotic resistance genes in the environment. Researchers found that the role of antibiotics in spreading resistance may have been overestimated, while these non-antibiotic conditions have been largely overlooked as contributors.
The global spread of antibiotic resistance genes (ARGs) has wreaked havoc with the treatment efficiency of antibiotics and, ultimately, anti-microbial chemotherapy, and has been conventionally attributed to the abuse and misuse of antibiotics. However, the ancient ARGs have alterative functions in bacterial physiology and thus they could be co-regulated by non-antibiotic conditions. Recent research has demonstrated that many non-antibiotic chemicals such as microplastics, metallic nanoparticles and non-antibiotic drugs, as well as some non-antibiotic conditions, can accelerate the dissemination of ARGs. These results suggested that the role of antibiotics might have been previously overestimated whereas the effects of non-antibiotic conditions were possibly ignored. Thus, in an attempt to fully understand the fate and behavior of ARGs in the eco-system, it is urgent to critically highlight the role and mechanisms of non-antibiotic chemicals and related environmental factors in the spread of ARGs. To this end, this timely review assessed the evolution of ARGs, especially its function alteration, summarized the non-antibiotic chemicals promoting the spread of ARGs, evaluated the non-antibiotic conditions related to ARG dissemination and analyzed the molecular mechanisms related to spread of ARGs induced by the non-antibiotic factors. Finally, this review then provided several critical perspectives for future research.
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This review explains how non-antibiotic pollutants like heavy metals, biocides, and microplastics are contributing to antibiotic resistance in water systems, beyond the well-known problem of antibiotic overuse. Wastewater treatment plants are hotspots where these pollutants interact with bacteria, promoting the spread of resistance genes through mobile genetic elements. The findings are concerning for human health because drug-resistant bacteria from water environments can ultimately reach people through drinking water and food.
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This review examined the role of microplastics as carriers of antibiotic resistance genes (ARGs) and pathogenic bacteria, analyzing how plastisphere biofilms concentrate and spread AMR through air, water, and soil environments. The evidence supports MPs as global vectors for antimicrobial resistance dissemination with implications for human health.
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This review examines how microplastics in the environment serve as carriers for antibiotic resistance genes, enriching and spreading resistant bacteria across air, soil, water, and sediments. Researchers found that the type, surface characteristics, and aging of microplastics all influence how effectively they accumulate resistance genes and facilitate horizontal gene transfer. The findings highlight the need to consider microplastics as an important vector in the environmental spread of antibiotic resistance.
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