In this episode authors Katherine L. Prowse,, and Elyanne M. Ratcliffe of McMaster University, discuss their recently published article titled “Effects of in utero exposure to fluoxetine on the gastrointestinal tract of rat offspring.” NEW & NOTEWORTHY There is increasing recognition of the relevance of in utero and early postnatal exposures in the developmental programming of the gastrointestinal tract. Perinatal exposure to selective serotonin reuptake inhibitors and antidepressant medications is of particular relevance as they are commonly prescribed during pregnancy, and serotonergic pathways play key roles during gastrointestinal development and in postnatal homeostasis. Here, we provide a comprehensive evaluation of clinically relevant outcomes of gastrointestinal motility and susceptibility to colitis in fluoxetine-exposed offspring and highlight changes in colonic serotonergic neurons at the peak of perinatal fluoxetine exposure with sex-dependent changes in serotonin signaling and colonic motility in adulthood. Article Citation: Effects of in utero exposure to fluoxetine on the gastrointestinal tract of rat offspring Katherine L. Prowse, Harriet Law, Sergio Raez-Villanueva, Filip Markovic, Megan Wang, Rajka Borojevic, Sean P. Parsons, Alexander D. Vincent, Alison C. Holloway, and Elyanne M. Ratcliffe American Journal of Physiology-Gastrointestinal and Liver Physiology 2023 325:6, G528-G538

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