Research Collection Doctoral Thesis The functional and comparative characterisation of adult neurogenesis and plasticity in the hippocampus Author(s): Dijk, Roelof Maarten <<van>> Publication Date: 2016 Permanent Link: https://doi.org/10.3929/ethz-a-010714226 Rights / License: In Copyright - Non-Commercial Use Permitted This page was generated automatically upon download from the ETH Zurich Research Collection. For more information please consult the Terms of use. ETH Library DISS. ETH NO. 23662 The functional and comparative characterisation of adult neurogenesis and plasticity in the hippocampus A thesis submitted to attain the degree of DOCTOR OF SCIENCES of ETH ZURICH (Dr. sc. ETH Zurich) presented by Roelof Maarten van Dijk Master of Science Radboud University Nijmegen born on 26.10.1986 citizen of the Netherlands accepted on the recommendation of Prof. David P. Wolfer PD Dr. Irmgard Amrein Lutz Slomianka, cand. scient. Dr. Stanley E. Lazic 2016 CONTENTS Contents .................................................................................................................................................. 2 Summary ................................................................................................................................................. 4 Zusammenfassung .................................................................................................................................. 7 1 Introduction .................................................................................................................................. 10 1.1 Hippocampus anatomy & morphology Introduction ............................................................ 11 1.2 Function ................................................................................................................................ 14 1.3 Adult neurogenesis ............................................................................................................... 18 1.4 Adult neurogenesis in non‐laboratory animals ..................................................................... 23 1.5 Aim of the thesis ................................................................................................................... 24 2 Publication: Fluoxetine effects on molecular, cellular and behavioral endophenotypes of depression are driven by the living environment ................................................................................. 26 2.1 Abstract ................................................................................................................................. 27 2.2 Introduction .......................................................................................................................... 28 2.3 Materials and Methods ......................................................................................................... 29 2.4 Results ................................................................................................................................... 30 2.5 Discussion .............................................................................................................................. 39 2.6 appendix, publication: Hippocampus‐related effects of fluoxetine ..................................... 43 3 Unpublished analyses: Differential effect of Fluoxetine on hippocampal volume and neurogenesis in different living environments ..................................................................................... 44 3.1 Introduction .......................................................................................................................... 45 3.2 Methods ................................................................................................................................ 45 3.3 Results ................................................................................................................................... 45 3.4 Discussion .............................................................................................................................. 47 4 Publication: Septo‐temporal distribution and lineage progression of hippocampal neurogenesis in a primate (Callithrix jacchus) in comparison to mice ........................................................................ 49 4.1 Abstract ................................................................................................................................. 50 4.2 Introduction .......................................................................................................................... 51 4.3 Materials and Methods ......................................................................................................... 52 4.4 Results ................................................................................................................................... 57 4.5 Discussion .............................................................................................................................. 64 5 Publication: Taxonomic separation of hippocampal networks: principal cell populations and adult neurogenesis ................................................................................................................................ 70 5.1 Abstract ................................................................................................................................. 71 5.2 Introduction .......................................................................................................................... 72 5.3 Materials and methods ......................................................................................................... 74 2 5.4 Results ................................................................................................................................... 81 5.5 Discussion .............................................................................................................................. 91 6 Publication: Habitat‐Specific Shaping of Proliferation and Neuronal Differentiation in Adult Hippocampal Neurogenesis of Wild Rodents ....................................................................................... 97 6.1 Abstract ................................................................................................................................. 98 6.2 Introduction .......................................................................................................................... 99 6.3 Materials and methods ....................................................................................................... 100 6.4 Results ................................................................................................................................. 106 6.5 Discussion ............................................................................................................................ 111 7 Publication: Large scale phenotyping links adult hippocampal neurogenesis to the reaction to novelty ................................................................................................................................................ 116 7.1 Abstract ............................................................................................................................... 117 7.2 Introduction ........................................................................................................................ 118 7.3 Materials and methods ....................................................................................................... 119 7.4 Results ................................................................................................................................. 124 7.5 Discussion ............................................................................................................................ 130 8 Discussion and outlook ............................................................................................................... 134 8.1 Stress, SSRIs and the hippocampus..................................................................................... 135 8.2 Comparative studies of adult neurogenesis, plastic questions .......................................... 137 8.3 Prediction ............................................................................................................................ 140 8.4 Conclusion ........................................................................................................................... 143 9 References .................................................................................................................................. 144 Acknowledgment ................................................................................................................................ 183 Curriculum vitae .................................................................................................................................. 184 3 SUMMARY The hippocampus is one of the most studied structures of the brain, it is connected to a wide range of brain regions and is functionally implied in an equally wide range of behavioural tasks. In addition, the realisation that the hippocampus is one of the very few regions where new neurons are born throughout life has added an extra level of complexity to understanding the hippocampus. In this thesis several aspects of hippocampal morphology, plasticity and functioning are investigated. The hippocampus is known to have strong ties to emotional behaviour and over the last