Evidence map›Paper›PMID 40063219›Full record

ArticlePharmacological reports : PR2025

Juvenile fluoxetine treatment affects the maturation of the medial prefrontal cortex and behavior of adolescent female rats.

Joanna Kryst, Agnieszka Chocyk, Anna Solarz-Andrzejewska, Iwona Majcher-Maślanka

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Article in Pharmacological reports : PR, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

4 authors.

Joanna Kryst *Department of Pharmacology and Brain Biostructure, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, Kraków, 31-343, Poland.ORCID http://orcid.org/0000-0003-4516-8723
Agnieszka Chocyk *Department of Pharmacology and Brain Biostructure, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, Kraków, 31-343, Poland. chocyk@if-pan.krakow.pl.ORCID http://orcid.org/0000-0002-0589-6569
Anna Solarz-AndrzejewskaDepartment of Pharmacology and Brain Biostructure, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, Kraków, 31-343, Poland.ORCID http://orcid.org/0000-0003-3486-3376
Iwona Majcher-MaślankaDepartment of Pharmacology and Brain Biostructure, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, Kraków, 31-343, Poland.ORCID http://orcid.org/0000-0001-9449-5582

Funding

National Science Centre, Poland 2017/25/B/NZ7/00174
6 · The paper itself

Abstract

backgroundSerotonin is strongly involved in the regulation of brain development, including the proper formation of neuronal circuits and synaptic plasticity. One of the factors that can affect brain serotonin levels is exposure to fluoxetine (FLX), a selective serotonin reuptake inhibitor, the first-line pharmacological treatment for depression and anxiety in the pediatric population. The safety of early-life FLX treatment is still questionable. Women are more prone to anxiety and depression from a young age. We hypothesized that juvenile FLX treatment influences the brain maturation and behavior of adolescent females.

methodsOn postnatal days 20 to 28, juvenile female rats were injected once daily with FLX. Five days later, anxiety- and fear-related behaviors and amphetamine-induced locomotor activity were assessed. On postnatal day 40, the numbers of neurons and glial cells in the medial prefrontal cortex (mPFC) and hippocampus were estimated via stereological methods. Additionally, the mRNA expression of cell survival/apoptosis and synaptic plasticity markers was evaluated via RT‒qPCR.

resultsFLX-treated females showed decreased anxiety level, freezing behavior during fear conditioning and amphetamine-induced locomotor activity when compared to control females. Simultaneously, FLX-injected females presented greater regional volume and numbers of neurons and astrocytes in specific subregions of the mPFC when compared to the control group. Additionally, FLX-treated females showed increased expression of genes regulating cell survival and reduced mRNA levels of AMPA glutamate receptors in the mPFC.

conclusionsJuvenile FLX affects the maturation of the mPFC and attenuates anxiety-like behavior, fear memory and the locomotor response to amphetamine in adolescent females.

Indexed as

Behavior, AnimalFluoxetinePrefrontal CortexSelective Serotonin Reuptake InhibitorsAmphetamineAnimalsAnxietyFearFemaleHippocampusLocomotionNeuronal PlasticityNeuronsRatsRats, WistarAmphetamineFluoxetineSelective Serotonin Reuptake InhibitorsAdolescenceAMPA glutamate receptorsApoptosisEndoplasmic reticulum stressFluoxetineMedial prefrontal cortex

Identifiers

PMID40063219

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.