1. Pregnane X receptor deletion modifies recognition memory and electroencephalographic activity
- Author
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Badreddine Boussadia, Chaitali Ghosh, Laurence Payrastre, Nicola Marchi, Jean-Marc Pascussi, Laila Lakhal, Giuseppe Gangarossa, Institut de Génomique Fonctionnelle (IGF), Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre National de la Recherche Scientifique (CNRS), Exposition, Perturbation Endocrino-métabolique et Reproduction (ToxAlim-EXPER), ToxAlim (ToxAlim), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole d'Ingénieurs de Purpan (INPT - EI Purpan), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Recherche Agronomique (INRA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Recherche Agronomique (INRA), Toxicologie Intégrative & Métabolisme (ToxAlim-TIM), LRI Cerebrovascular Research, Cleveland Clinic, Unité de Biologie Fonctionnelle et Adaptative (BFA (UMR_8251 / U1133)), Université Paris Diderot - Paris 7 (UPD7)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université Sorbonne Paris Cité (USPC), and Centre National de la Recherche Scientifique (CNRS)
- Subjects
Male ,0301 basic medicine ,[SDV]Life Sciences [q-bio] ,Electroencephalography ,human health ,0302 clinical medicine ,anxiety disorder ,nuclear receptor ,Claudin-5 ,EEG ,récepteur nucléaire ,Mice, Knockout ,Pregnane X receptor ,medicine.diagnostic_test ,General Neuroscience ,Pregnane X Receptor ,Brain ,santé humaine ,Isolated brain ,anxiety ,Motor coordination ,Delta wave ,système nerveux central ,medicine.anatomical_structure ,cerveau ,Psychology ,anxiete ,Central nervous system ,Motor Activity ,recognition memory ,activité cérébrale ,Article ,03 medical and health sciences ,medicine ,Animals ,Learning ,Recognition memory ,Recognition, Psychology ,nuclear receptor PXR ,neurovascular structure ,central nervous system ,Capillaries ,Mice, Inbred C57BL ,030104 developmental biology ,Nuclear receptor ,Zonula Occludens-1 Protein ,Sleep ,Neuroscience ,030217 neurology & neurosurgery - Abstract
Nuclear receptors (NR) are emerging as key players in the central nervous system (CNS) with reported implications in physiological and pathophysiological conditions. While other NR have been studied, it is unknown whether invalidation of the pregnane xenobiotic receptor (PXR, NR1I2) corresponds to neurological modifications in the adult brain. PXR-/- C57BL/6j and wild type mice were used to investigate: i) recognition memory, motor coordination, and anxiety-like behaviors; ii) longitudinal video-electroencephalographic (EEG) recordings and frequency wave analysis; iii) neurovascular structures by histological evaluation and expression of the cerebrovascular tight junctions ZO1 and CLDN5. Absence of PXR was associated with anxiety-like behavior and recognition memory impairment in adult mice. The latter was simultaneous to an electroencephalographic signature of lower theta frequency during sleep and abnormal delta waves. Neurophysiological changes did not correspond to significant structural changes in the adult brain, expect for a localized and minor increase in the fronto-parietal neurovascular density and reduced ZO1, but not CLDN5, expression in isolated brain capillaries. Our results converge with existing evidence supporting a link between NR expression and brain physiology. Although the exact modalities remain to be elucidated, the possibility that extra-physiological modulation of PXR may constitute a pathophysiological entry point or a molecular target for brain diseases is proposed.
- Published
- 2018
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