Max Planck Florida Institute for Neuroscience 3 articles published in JoVE Genetics Use of Freeze-thawed Embryos for High-efficiency Production of Genetically Modified Mice Hirofumi Nishizono*1,2,3, Mohamed Darwish*4,5, Hideki Uosaki6,7, Nanami Masuyama8,9,10, Motoaki Seki8,11, Hiroyuki Abe3, Nozomu Yachie8,9,10,12,13, Ryohei Yasuda1 1Max Planck Florida Institute for Neuroscience, 2Life Science Research Center, University of Toyama, 3Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, 4Graduate School of Innovative Life Science, University of Toyama, 5Department of Biochemistry, Faculty of Pharmacy, Cairo University, 6Division of Regenerative Medicine, Center for Molecular Medicine, Jichi Medical University, 7Division of Stem Cell Research and Drug Development, Center for Development of Advanced Medical Technology, Jichi Medical University, 8Synthetic Biology Division, Research Center for Advanced Science and Technology, University of Tokyo, 9Institute for Advanced Biosciences, Keio University, 10Graduate School of Media and Governance, Keio University, 11Department of Molecular Oncology, Graduate School of Medicine, Chiba University, 12Department of Biological Sciences, School of Science, University of Tokyo, 13College of Arts and Sciences, University of Tokyo Here, we present a modified method for cryopreservation of one-cell embryos as well as a protocol that couples the use of freeze-thawed embryos and electroporation for the efficient generation of genetically modified mice. Behavior Longitudinal Two-Photon Imaging of Dorsal Hippocampal CA1 in Live Mice Alessandro F. Ulivi1, Tim P. Castello-Waldow1, Ghabiba Weston1,2, Long Yan3, Ryohei Yasuda3, Alon Chen1,4, Alessio Attardo1 1Dept. of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, 2Graduate School of Systemic Neurosciences, Ludwig Maximilians University, 3Max Planck Florida Institute for Neuroscience, 4Dept. of Neurobiology, Weizmann Institute of Science This method describes a chronic preparation that allows optical access to the hippocampus of living mice. This preparation can be used to perform longitudinal optical imaging of neuronal structural plasticity and activity-evoked cellular plasticity over a period of several weeks. Neuroscience Ex Vivo Optogenetic Dissection of Fear Circuits in Brain Slices Daniel Bosch1, Douglas Asede2, Ingrid Ehrlich1 1Hertie Institute for Clinical Brain Research and Werner Reichardt Centre for Integrative Neuroscience, University of Tuebingen, 2Max Planck Florida Institute for Neuroscience Optogenetic approaches are widely used to manipulate neural activity and assess the consequences for brain function. Here, a technique is outlined that upon in vivo expression of the optical activator Channelrhodopsin, allows for ex vivo analysis of synaptic properties of specific long range and local neural connections in fear-related circuits.
