Attenuated estrogen signaling disrupts placentation and drives trophoblast defects in Down syndrome

This study uses induced pluripotent stem cells from Down syndrome patients to demonstrate that reduced estrogen signaling contributes to placental defects characteristic of the condition. Researchers identified NRIP1, a gene on chromosome 21, as a key driver of abnormal trophoblast cell development, offering mechanistic insight into why Down syndrome is associated with placental insufficiency and related health challenges.