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Lipocalin-2 regulates adult neurogenesis and contextual discriminative behaviours

Molecular Psychiatry volume 23, pages 1031–1039 (2018)Cite this article

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Abstract

In the adult mammalian brain, newborn granule cells are continuously integrated into hippocampal circuits, and the fine-tuning of this process is important for hippocampal function. Thus, the identification of factors that control adult neural stem cells (NSCs) maintenance, differentiation and integration is essential. Here we show that the deletion of the iron trafficking protein lipocalin-2 (LCN2) induces deficits in NSCs proliferation and commitment, with impact on the hippocampal-dependent contextual fear discriminative task. Mice deficient in LCN2 present an increase in the NSCs population, as a consequence of a G0/G1 cell cycle arrest induced by increased endogenous oxidative stress. Of notice, supplementation with the iron-chelating agent deferoxamine rescues NSCs oxidative stress, promotes cell cycle progression and improves contextual fear conditioning. LCN2 is, therefore, a novel key modulator of neurogenesis that, through iron, controls NSCs cell cycle progression and death, self-renewal, proliferation and differentiation and, ultimately, hippocampal function.

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Acknowledgements

AC Ferreira is a recipient of PhD fellowship and B Sampaio-Marques is a recipient of postdoctoral fellowship from the Foundation for Science and Technology (FCT, Portugal)/FEDER. F Marques is an assistant researcher IF/00231/2013 of the Foundation for Science and Technology (FCT, Portugal). This work was supported by Foundation for Science and Technology (FCT) and COMPETE through the project EXPL/NEU-OSD/2196/2013 (to F Marques) and by the Bial Foundation through Grant 217/12 (to JC Sousa). The work at ICVS/3B’s has been developed under the scope of the project NORTE-01-0145-FEDER-000013, supported by the Northern Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (FEDER), and funded by FEDER funds through the Competitiveness Factors Operational Programme (COMPETE), and by National funds, through the Foundation for Science and Technology (FCT), under the scope of the project POCI-01-0145-FEDER-007038. The work at CICS-UBI has the support of FEDER funds through the POCI - COMPETE 2020 - Operational Programme Competitiveness and Internationalisation in Axis I - Strengthening research, technological development and innovation (Project POCI-01-0145-FEDER-007491) and National Funds by Foundation for Science and Technology (Project UID/Multi /00709/2013).

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Authors and Affiliations

  1. Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal

    A C Ferreira, B Sampaio-Marques, A Novais, S D Mesquita, P Ludovico, M Correia-Neves, N Sousa, J A Palha, J C Sousa & F Marques

  2. ICVS/3B’s-PT Government Associate Laboratory, Guimarães, Portugal

    A C Ferreira, B Sampaio-Marques, A Novais, S D Mesquita, P Ludovico, M Correia-Neves, N Sousa, J A Palha, J C Sousa & F Marques

  3. Health Sciences Research Center (CICS-UBI), University of Beira Interior, Covilhã, Portugal

    T Santos & L Bernardino

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Correspondence to F Marques.

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Ferreira, A., Santos, T., Sampaio-Marques, B. et al. Lipocalin-2 regulates adult neurogenesis and contextual discriminative behaviours. Mol Psychiatry 23, 1031–1039 (2018). https://doi.org/10.1038/mp.2017.95

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