Placental endocrine function shapes cerebellar development and social behavior

Authors: Claire‐Marie Vacher, Hélène Lacaille, Jiaqi J. O’Reilly, Jacquelyn Salzbank, Dana Bakalar, Sonia Sebaoui, Philippe Lière, Cheryl Clarkson‐Paredes, Toru Sasaki, A. G. Sathyanesan, Panagiotis Kratimenos, Jacob Ellegood, Jason P. Lerch, Yuka Imamura Kawasawa, Anastas Popratiloff, Kazue Hashimoto‐Torii, Vittorio Gallo, Michaël Schumacher, Anna A. Penn - Nature Neuroscience 2021 cited by 116

Abstract Compromised placental function or premature loss has been linked to diverse neurodevelopmental disorders. Here we show that placenta allopregnanolone (ALLO), a progesterone-derived GABA-A receptor (GABA A R) modulator, reduction alters neurodevelopment in a sex-linked manner. A new conditional mouse model, in which the gene encoding ALLO’s synthetic enzyme ( akr1c14 ) is specifically deleted in trophoblasts, directly demonstrated that placental ALLO insufficiency led to cerebellar white matter abnormalities that correlated with autistic-like behavior only in male offspring. A single injection of ALLO or muscimol, a GABA A R agonist, during late gestation abolished these alterations. Comparison of male and female human preterm infant cerebellum also showed sex-linked myelination marker alteration, suggesting similarities between mouse placental ALLO insufficiency and human preterm brain development. This study reveals a new role for a placental hormone in shaping brain regions and behaviors in a sex-linked manner. Placental hormone replacement might offer novel therapeutic opportunities to prevent later neurobehavioral disorders.