Nanoparticles Threaten Unborn Babies – New Study Sparks Alarm
The Tiny Particles Putting Pregnancy at Risk
Human life kicks off from a single egg cell, but hidden dangers lurk even before birth. Tiny nanoparticles found everywhere—from cosmetics to the air we breathe—may be slipping past the placental barrier, the body’s frontline defence for unborn babies. Scientists warn these minuscule villains could cause low birth weight, autism, and respiratory problems.
Breaking Down the Placental Barrier
Researchers at Empa’s Particles-Biology Interactions lab in St. Gallen, led by Tina Bürki, reveal the placental barrier isn’t as impenetrable as once thought. Even when nanoparticles don’t directly reach the fetus, damage can still occur. “Our work with clinical partners in St. Gallen, Geneva, Amsterdam and Düsseldorf points to disturbing effects on fetal tissue,” Bürki said.
Human Placentas Under the Microscope
The team uses real human placentas from planned caesarean sections to study nanoparticle impact. This rare approach reveals how these particles disrupt key messenger substances, critical to fetal blood vessel growth. Laboratory tests showed nanoparticle exposure leads to weaker, coarse blood vessel networks—bad news for embryo development.
Uncovering the Secretome: The Hidden Danger
Scientists are zeroing in on the “secretome” – the cocktail of messenger substances released by affected placentas. Early results suggest some systems, like the nervous system, might escape harm, but others could trigger serious disorders indirectly.
“These findings demand urgent risk assessments of nanomaterials to protect pregnant women and their babies,” researchers warn.
With support from the Cantonal Hospital of St. Gallen, this groundbreaking work aims to decode how nanoparticles compromise placental function and harm embryonic health. The tiny particles might be small—but their threat is anything but.
