摘要:
This invention provides an improved system for monitoring and recording cell cultures. An improved lid (10) for the system includes pin sockets (28) interposed between traces (24) on a printed circuit board (22) and elongated, electrically conductive pins (38). A method for measuring a delay period for an alternating current voltage applied across a pair of pins (38) improves the stability of measurements made with the improved system. A method for applying a voltage across a pair of pins (38) which avoids exceeding a pre-established voltage avoids the possibility of damaging and/or destroying cells while monitoring their culture. Subtracting electrical conductivity measured for a reference well (16) that holds only cell growth media without cells from the electrical conductivity measured for other wells (16) during analysis of recorded data improves the presentation of test results obtained by monitoring and recording cell cultures.
摘要:
This invention provides an improved system for monitoring and recording cell cultures. An improved lid (10) for the system includes pin sockets (28) interposed between traces (24) on a printed circuit board (22) and elongated, electrically conductive pins (38). A method for measuring a delay period for an alternating current voltage applied across a pair of pins (38) improves the stability of measurements made with the improved system. A method for applying a voltage across a pair of pins (38) which avoids exceeding a pre-established voltage avoids the possibility of damaging and/or destroying cells while monitoring their culture. Subtracting electrical conductivity measured for a reference well (16) that holds only cell growth media without cells from the electrical conductivity measured for other wells (16) during analysis of recorded data improves the presentation of test results obtained by monitoring and recording cell cultures.
摘要:
High-throughput screening method and apparatus are described. The method includes placing cells on a substrate defining a plurality of discrete microwells, at a well density of greater than about 100/cm2, with the number of cells in each well being less than about 1000, and where the cells in each well have been exposed to a selected agent. The change in conductance in each well is determined by applying a low-voltage, AC signal across a pair of electrodes placed in that well, and synchronously measuring the conductance across the electrodes, to monitor the level of growth or metabolic activity of cells contained in each well. Also disclosed is an apparatus for carrying out the screening method.
摘要:
The present invention provides a method of profiling cells. In the method, cells from a population of cells are distributed in a culture well provided with electrodes and with the requisite medium and cultured. Conductance is detected at various time intervals. The measured values of conductance are compared with reference data.
摘要:
This invention provides an improved system for monitoring and recording cell cultures. An improved lid (10) for the system includes pin sockets (28) interposed between traces (24) on a printed circuit board (22) and elongated, electrically conductive pins (38). A method for measuring a delay period for an alternating current voltage applied across a pair of pins (38) improves the stability of measurements made with the improved system. A method for applying a voltage across a pair of pins (38) which avoids exceeding a pre-established voltage avoids the possibility of damaging and/or destroying cells while monitoring their culture. Subtracting electrical conductivity measured for a reference well (16) that holds only cell growth media without cells from the electrical conductivity measured for other wells (16) during analysis of recorded data improves the presentation of test results obtained by monitoring and recording cell cultures.