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Role of microplastics in the tumor microenvironment (Review)
Summary
This review examines how microplastics may help tumors grow by influencing the environment around cancer cells. Microplastics can interact with immune cells, connective tissue cells, blood vessel cells, and the tissue scaffolding around tumors in ways that may promote cancer progression and inflammation. While more research is needed, the findings raise important questions about whether chronic microplastic exposure could affect cancer development in humans.
Microplastics (MPs) are pervasive in several ecosystems and have the potential to infiltrate multiple aspects of human life through ingestion, inhalation and dermal exposure, thus eliciting substantial concerns regarding their potential implications for human health. Whilst initial research has documented the effects of MPs on disease development across multiple physiological systems, MPs may also facilitate tumor progression by influencing the tumor microenvironment (TME). This evolving focus underscores the growing interest in the role of MPs in tumorigenesis and their interactions within the TME. In the present review, the relationship between MPs and the TME is comprehensively assessed, providing a detailed analysis of their interactions with tumor cells, stromal cells (including macrophages, fibroblasts and endothelial cells), the extracellular matrix and inflammatory processes. Recommendations for future research directions and strategies to address and reduce microplastic pollution are proposed.