A new study of chicken embryos suggests that sufficient concentrations of teensy nanoplastics speckles could interfere with the earliest stages of development, glugging up stem cells from which tissues and organs usually emerge.
In these latest lab experiments, the polystyrene nanoplastics seemed to get stuck oncalled neural crest cells, stopping them from migrating into place where they would normally form important tissues and organs.
In all vertebrates, neural crest cells give rise to parts of the heart, arteries, facial structures, and nervous system.A quarter of the chick embryos had one or two abnormally small eyes, while others showed facial deformities, thinning heart muscles, and slow heart rates. Neural tube defects were also noted, which occur when the neural folds that form the early brain and spinal cord fail to meet and close properly. This all links back to those neural crest cells, the researchers suspect.
"Neural crest cells are sticky, so nano-particles can adhere to them and thereby disrupt organs that depend on these cells for their development,"Chick embryos injected with polystyrene nanoplastics show neural tube defects compared to untreated controls with full formed neural tubes . (
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