Microplastics May Pose Serious Danger to Intestinal Health

Microplastics and their even smaller counterparts, nanoplastics, have rapidly spread throughout the environment and our bodies. These durable and mobile particles can be found virtually everywhere on Earth, from cities and farms to oceans and ice sheets. As a result, we unintentionally consume an estimated 74,000 microplastic particles every year.

Source: CBS 8 San Diego/YouTube

The study’s lead author, Ying Chen, a biomedical engineer at Tufts University, highlights the widespread presence of particulate plastic in the environment and its detection in human intestines, blood, and even the brain and placenta. However, our understanding of how microplastics affect human health remains limited.

To investigate the impact of microplastics on the human gut, researchers used human intestinal organoids as a model. Stem cells were prompted to differentiate into various cell types found in the walls of real intestines. This model allowed the researchers to observe how different cell types absorbed microplastics. The experiments showed that epithelial cells absorbed the smallest nanoplastics, while microfold cells, responsible for the gut’s immune response, absorbed larger particles and transported them into the intestinal tissue.

Significantly, damage to the intestinal model only occurred when microfold cells were present and when high concentrations of small plastic particles were present. Additionally, higher levels of nanoplastics triggered the release of inflammatory cytokines, proteins involved in the immune response, but this effect was also mediated by microfold cells.

Although more research is needed to fully understand the impact of different types, sizes, and amounts of microplastics on gut health, this study provides valuable insights. Using human intestinal organoids as a model can help unravel the potential toxicity of microplastics and other environmental particles. The findings emphasize the urgent need to address the pervasive issue of microplastic pollution and its potential risks to human health.

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