Universitaet Leipzig

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Universitat Leipzig

Andrea Robitzki

Heinz-Georg Jahnke

Frank Striggow

Till Mack

Hagen Thielecke

Andrée Rothermel

Ronny Azendorf

Ina Sternberger

Dana Krinke

Randy Kurz

The present invention refers to a device for measuring impedance in organotypic tissue comprising at least one recording chamber with a liquid permeable membrane supporting the organotypic tissue, at least one bottom electrode and at least one top electrode, wherein the liquid permeable membrane divides the recording chamber into a top chamber and a bottom chamber, wherein at least the bottom chamber contains culture medium for the organotypic tissue, and the bottom electrode(s) is/are located in the bottom chamber and the top electrode(s) is/are located in the top chamber, and wherein the organotypic tissue is located between the bottom electrode(s) and the top electrode(s). The present invention also refers to the use of the device according to the present invention for measuring impedance in organotypic tissue. Furthermore, the present invention relates to a method for analyzing the effect of test compounds on pathological and non-pathological organotypic tissue by measuring the impedance of the organotypic tissue, wherein the organotypic tissue is cultured in a culture medium during the time of the analysis and the impedance of the organotypic tissue is measured at least once before and at least once after treating the organotypic tissue with the test compound or the impedance of the organotypic tissue treated with the test compound is compared to a non-treated organotypic tissue, wherein the impedance is measured using at least one electrode at each of two opposing sides of the organotypic tissue, and the electrodes are contacted with the culture medium or the tissue during measuring the impedance.

Device and method for measuring impedance in organotypic tissues

The present invention relates to a device and a method for parallel recording of impedance spectra and field potential of cells in vitro.

Device and method for parallel recording of impedance spectra and field potential

Disclosed herein are methods for identifying an agent for treating or preventing neurogenerative disease and to methods for recapitulating tauopathies using a tau protein that includes at least four different mutations that cause the condition frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17), and to nucleic acids encoding the tau protein.

Polymutant tau protein variants and their use for recapitulating human tauopathies

Disclosed is a device for detecting bioelectric signals from spheroids comprising a measuring chamber having a measuring chamber wall which encloses a volume, which is open at least at one side, is composed of an electrically non-conducting material, and has, in at least one measuring region, an inner cross section, which corresponds as far as possible to the largest cross section of a spheroid, comprising at least a number of electrodes which are disposed in a common plane inside said measuring chamber wall and each electrode has a freely accessible electrode surface which is oriented towards the measuring region, and comprising an impedance measuring arrangement which is connected to the electrodes. The device and the method can be used to test substances in 3D biological in-vitro (three-dimensional) cell aggregates.

Device and method for detecting bioelectric signals from electrophysiologically active regions in spheroids

Growing community of inventors

Viernheim, Germany

Andrea Robitzki