Animal models are useful preclinical tools for studying the pathogenesis of mental disorders and the effectiveness of their treatment. While it is not possible to mimic all symptoms occurring in humans, it is however possible to investigate the behavioral, physiological and neuroanatomical alterations relevant for these complex disorders in controlled conditions and in genetically homogeneous populations. Stressful and infection-related exposures represent the most employed environmental risk factors able to trigger or to unmask a psychopathological phenotype in animals. Indeed, when occurring during sensitive periods of brain maturation, including pre, postnatal life and adolescence, they can affect the offspring's neurodevelopmental trajectories, increasing the risk for mental disorders. Not all stressed or immune challenged animals, however, develop behavioral alterations and preclinical animal models can explain differences between vulnerable or resilient phenotypes.Our review focuses on different paradigms of stress (prenatal stress, maternal separation, social isolation and social defeat stress) and immune challenges (immune activation in pregnancy) and investigates the subsequent alterations in several biological and behavioral domains at different time points of animals' life. It also discusses the "double-hit" hypothesis where an initial early adverse event can prime the response to a second negative challenge.Interestingly, stress and infections early in life induce the activation of the hypothalamic pituitary-adrenal (HPA) axis, alter the levels of neurotransmitters, neurotrophins and pro inflammatory cytokines and affect the functions of microglia and oxidative stress.In conclusion, animal models allow shedding light on the pathophysiology of human mental illnesses and discovering novel molecular drug targets for personalized treatments.(

Preclinical animal models of mental illnesses to translate findings from the bench to the bedside: Molecular brain mechanisms and peripheral biomarkers associated to early life stress or immune challenges / N. Cattane, A. C Vernon, A. Borsini, C. Scassellati, D. Endres, L. Capuron, R. Tamouza, M. Eriksen Benros, J. C Leza, C. M Pariante, M.A. Riva, A. Cattaneo. - In: EUROPEAN NEUROPSYCHOPHARMACOLOGY. - ISSN 0924-977X. - 58:(2022 May), pp. 55-79. [10.1016/j.euroneuro.2022.02.002]

Preclinical animal models of mental illnesses to translate findings from the bench to the bedside: Molecular brain mechanisms and peripheral biomarkers associated to early life stress or immune challenges

M.A. Riva;A. Cattaneo
2022

Abstract

Animal models are useful preclinical tools for studying the pathogenesis of mental disorders and the effectiveness of their treatment. While it is not possible to mimic all symptoms occurring in humans, it is however possible to investigate the behavioral, physiological and neuroanatomical alterations relevant for these complex disorders in controlled conditions and in genetically homogeneous populations. Stressful and infection-related exposures represent the most employed environmental risk factors able to trigger or to unmask a psychopathological phenotype in animals. Indeed, when occurring during sensitive periods of brain maturation, including pre, postnatal life and adolescence, they can affect the offspring's neurodevelopmental trajectories, increasing the risk for mental disorders. Not all stressed or immune challenged animals, however, develop behavioral alterations and preclinical animal models can explain differences between vulnerable or resilient phenotypes.Our review focuses on different paradigms of stress (prenatal stress, maternal separation, social isolation and social defeat stress) and immune challenges (immune activation in pregnancy) and investigates the subsequent alterations in several biological and behavioral domains at different time points of animals' life. It also discusses the "double-hit" hypothesis where an initial early adverse event can prime the response to a second negative challenge.Interestingly, stress and infections early in life induce the activation of the hypothalamic pituitary-adrenal (HPA) axis, alter the levels of neurotransmitters, neurotrophins and pro inflammatory cytokines and affect the functions of microglia and oxidative stress.In conclusion, animal models allow shedding light on the pathophysiology of human mental illnesses and discovering novel molecular drug targets for personalized treatments.(
Animal models; Behavioral outcomes; Maternal immune activation; Psychiatric disorders; Stress;
Settore BIO/14 - Farmacologia
   Piano di Sostegno alla Ricerca 2015-2017 - Linea 2 "Dotazione annuale per attività istituzionali" (anno 2021)
   UNIVERSITA' DEGLI STUDI DI MILANO
mag-2022
27-feb-2022
Article (author)
File in questo prodotto:
File Dimensione Formato  
NEUPSY-S-21-00521.pdf

accesso aperto

Tipologia: Pre-print (manoscritto inviato all'editore)
Dimensione 2.28 MB
Formato Adobe PDF
2.28 MB Adobe PDF Visualizza/Apri
1-s2.0-S0924977X22001262-main.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 1.34 MB
Formato Adobe PDF
1.34 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/922665
Citazioni
  • ???jsp.display-item.citation.pmc??? 14
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 18
social impact