2 articles published in JoVE
Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice Franziska Bender1,2, Tatiana Korotkova2,3, Alexey Ponomarenko1,2 1Systems Neurophysiology Research Group, Institute of Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich Heine University Düsseldorf, 2Behavioural Neurodynamics Group, Leibniz Institute for Molecular Pharmacology (FMP)/ NeuroCure Cluster of Excellence, 3Neuronal Circuits and Behavior Research Group, Max Planck Institute for Metabolism Research We describe the use of optogenetics and electrophysiological recordings for selective manipulations of hippocampal theta oscillations (5-10 Hz) in behaving mice. The efficacy of the rhythm entrainment is monitored using local field potential. A combination of opto- and pharmacogenetic inhibition addresses the efferent readout of hippocampal synchronization.
Reconstitution of Nucleosomes with Differentially Isotope-labeled Sister Histones Stamatios Liokatis1 1Department of Structural Biology, Leibniz Institute of Molecular Pharmacology (FMP-Berlin) This protocol describes the reconstitution of nucleosomes containing differentially isotope-labeled sister histones. At the same time, asymmetrically post-translationally modified nucleosomes can be generated after using a premodified histone copy. These preparations can be readily used to study modification crosstalk mechanisms, simultaneously on both sister histones, by using high-resolution NMR spectroscopy.