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Bacteria–nanoplastic interactions: mechanisms, ecological consequences, and advances in biodegradation technologies
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Tiny plastic particles called nanoplastics (way smaller than microplastics) can mess with the helpful bacteria living in our environment and bodies, damaging their cells, disrupting normal function, and even helping harmful bacteria swap antibiotic-resistance genes. This review pulls together existing research to show how these plastic particles interact with bacterial communities, raising concerns about immune system effects and microbiome health, while also highlighting how scientists are working on bacteria that can break down plastic waste.
Nanoplastics (< 1 μm) represent a pervasive class of environmental contaminants with unique physicochemical properties that profoundly influence microbial ecosystems. Their high surface-area-to-volume ratio, weathering-induced functionalization, and ability to adsorb chemical pollutants and biomolecules facilitate intricate interactions with bacterial communities. This review systematically examines nanoplastic-bacteria interactions, highlighting mechanisms such as oxidative stress induction, membrane perturbation, DNA damage, metabolic reprogramming, biofilm modulation, and enhanced horizontal gene transfer, which collectively reshape microbial structure and function. Emphasis is placed on the plastisphere microbiome as a dynamic hotspot for pollutant accumulation, pathogen enrichment, and resistance gene exchange. Bacterial biodegradation pathways, including enzymatic hydrolysis, oxidative processes, biosurfactant-mediated interactions, and multispecies consortia activity, are analyzed in detail. Advanced analytical tools, such as nanoscale imaging, spectroscopy, flow cytometry, meta-omics, and AI-assisted computational modeling, are discussed for their role in elucidating nanoplastic-microbe dynamics. Environmental and human health implications, including microbiome disruption, immunotoxicity, and ecological perturbations, are evaluated. Finally, emerging biotechnological strategies for enhancing biodegradation are explored, and critical research gaps are identified. This review provides a comprehensive framework for understanding nanoplastic-bacteria interactions, offering strategic insights for environmental monitoring, risk assessment, and bioremediation development.
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Microplastic–Bacteria Interactions: Toxicity, Colonisation, Degradation and Prospects
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Tiny plastic particles (microplastics) that end up in water, soil, and even our gut don't just sit there, they interact with bacteria in ways that can be harmful or surprisingly helpful. This review pulls together existing research showing that microplastics can stress out healthy bacteria and help harmful germs (including drug-resistant ones) cluster and spread on their surfaces, but certain bacteria can also break the plastic down. Understanding this two-sided relationship matters because it could help scientists better predict health risks from microplastic pollution and develop bacteria-based methods to clean it up.
Bacterial Interactions with Nanoplastics and the Environmental Effects They Cause
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This review examined how bacteria interact with nanoplastics in natural environments, covering colonization, biofilm formation, gene transfer, and ecological effects, emphasizing that bacterial-nanoplastic interactions are critical for assessing environmental risk.
Gut microbiota, a key to understanding the knowledge gaps on micro-nanoplastics-related biological effects and biodegradation
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This review explores how micro- and nanoplastics affect the community of microorganisms living in the gut, and how those same gut microbes might be able to break down plastic particles. Swallowed microplastics can disrupt the balance of gut bacteria, potentially leading to various diseases. On the other hand, some gut bacteria can actually degrade plastics into smaller, less harmful molecules, opening a possible avenue for biological cleanup.
Micro- and Nanoplastics: Hidden Environmental Catalysts of Antimicrobial Resistance
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Tiny plastic bits called microplastics and nanoplastics—created when everyday plastic waste breaks down from sun exposure, weather, and other natural forces—have spread throughout our water, soil, and air. This review paper explains how these particles form and travel so easily through the environment, raising concerns about their potential role in helping harmful bacteria become resistant to antibiotics. Understanding this hidden connection matters because antibiotic resistance is already a major public health threat, and widespread plastic pollution could be quietly making the problem worse.
Unraveling the effect of micro/nanoplastics on the occurrence and horizontal transfer of environmental antibiotic resistance genes: Advances, mechanisms and future prospects
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This review examines how micro- and nanoplastics promote the spread of antibiotic resistance genes in the environment. The tiny plastic particles create conditions that help bacteria exchange resistance genes more easily by generating oxidative stress, making cell membranes more permeable, and providing surfaces where resistant bacteria can form communities. This is a growing public health concern because antibiotic-resistant infections are increasingly difficult to treat.
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