摘要:
A method and system of in vitro developmental toxicity testing comprising the steps of micropatterning an extracellular matrix; growing embryonic stem cells on the micropatterned extracellular matrix in the presence of mesoendermal induction and testing for change of the geometrical mesoendoderm structure in the presence or absence of a test compound wherein (1) a decrease in mesoendodermal differentiation and/or (2) a change in morphology of the geometrical mesoendoderm structure in the presence of the test compound compared to cells in the absence of the test compound indicates that the test compound is a developmental toxic agent.
摘要:
The invention relates to an apparatus (1) for culturing anchorage-dependent cells. The apparatus (1) comprises a housing (2) with an inlet (4) and an outlet (5), and a plurality of culture plates (6) removably stacked within the housing (2). The housing (2) has a circumferential wall (7), a base (8) and a top wall (9). The base (8) comprises the inlet (4) and the top wall (9) comprises the outlet (5). The circumferential wall (7) of the housing (2) defines a longitudinal axis thereof, as well as an inner cross section perpendicular to the longitudinal axis. Shape and dimensions of the inner cross section are essentially uniform along the longitudinal axis. The culture plates (6) are arranged at least essentially parallel to each other. Each plate (6) is mounted and sealed to the circumferential wall (7) of the housing (2). Plates (6) are arranged at a distance from each other. Each culture plate (6) has a through hole (14), so that inlet (4) and outlet (5) are in fluid communication. Each through hole (14) is positioned at an outer end of the respective culture plate (6), proximate the circumferential wall (7). Through holes (14) of adjacent culture plates (6) are distally positioned in the plane of the inner cross section of the housing (2).
摘要:
The invention provides a surface, wherein said surface comprises (i) a polymer substrate and (ii) sugar groups and peptide groups coupled to said substrate suitable for culturing hepatocytes.
摘要:
A microscope for optical imaging of high optical scattering coefficient biological tissue, comprising an optical excitation source for irradiating a scan area of the sample and generating optical emissions, wherein the sample has a first face facing away from the source and a second face facing the source. A two dimensional element for scanning the light over the sample; a focusing element having a numerical aperture NAi to focus the light onto the sample; a first optical condenser to collect light from the first face, the collected light comprising source transmitted light and first optical emission generated in the sample, the condenser having a NA2 larger than NAi; an optical filter to block the transmitted source light; an aperture with a size corresponding to the irradiated area of the sample, the aperture at the conjugate image position of the sample generated by the condenser; and an optical detector collecting light from the first face for detecting the first optical emission from the scan area.