摘要:
A method of determining the transfection status of a plurality of cells comprising the steps of providing a population of cells that have been subjected to a cell membrane disruption treatment, passing a focussed stream of the population of cells in a carrier liquid along a microfluidic channel having a detection zone comprising a pair of detection electrodes configured to detect electrical impedance across the channel in the detection zone, detecting a change in the electrical impedance across the channel in the detection zone corresponding to each of the plurality of cells passing the detection zone, comparing the change in electrical impedance for each cell with a reference change in electrical impedance, and calculating the transfection status of the plurality of cells based on the comparison.
摘要:
A device for assessing the status of a fluid containing cells of mammalian origin, the device comprises a cartridge (2) having an enclosed fluidic channel (28), an assay area (22) disposed within the fluidic channel (28) which is covered by at least one agent capable of selectively recruiting at least one type of cell contained within the mammalian fluid, an inlet port (25) for the fluidic channel, an outlet port (24) for the fluidic channel and a piercing means (51) adapted for connecting to a sealed container (4) containing the cell containing fluid by puncturing the container. The inlet port and piercing means are adapted to provide fluid communication between the fluidic channel and the sealed container when the sealed contained is punctured by the piercing means. The outlet port is adapted for fluid communication with a syringe (3) such that actuation of the syringe provides controlled flow of fluid over the assay area to achieve desired physiological shear stress conditions for the type of cell being recruited at the assay area. The cartridge is adapted for integration with a read out instrument for acquiring optical signal at the assay area of the channel.
摘要:
A microfluidic apparatus for separation of particulates in a fluidAn apparatus for separation of particulates in a fluid (3A) into subsets of particulates comprises a microfluidic chip (1) comprising: a microfluidic channel having a fluid inlet for receipt of a stream of particulate containing fluid (3A), a detection zone disposed in the microfluidic channel and comprising a sensor configured to detect changes in the microfluidic channel corresponding to particulates passing the sensor, and a separation zone distal of the detection zone in which the microfluidic channel divides into at least two secondary microfluidic channels (4). The separation zone comprises two or more separation electrodes (16A, 16B) including at least one separation electrode (16A, 16B, 16C, 16D) disposed in electrical contact with an interior of the microfluidic channel and at least one further separation electrode (16A, 16B, 16C, 16D) disposed in electrical contact with an interior of the microfluidic channel or one of the secondary microfluidic channels (4). The pair of separation electrodes (16A, 16B) are configured to pass a pulse of electrical current through the separation zone of the microfluidic channel.
摘要:
An apparatus (1) for culturing live cells comprising a cell culture vessel (5), a fresh culture medium storage vessel (3), a used culture medium collection vessel (4), a supply conduit (9, 10) adapted to provide fluid communication between the fresh culture medium storage vessel and a first end of the cell culture vessel, an inlet of the supply conduit being located towards a base of the fresh culture medium storage vessel, a drainage conduit (12) adapted to provide fluid communication between a second end of the cell culture vessel and the used culture medium collection vessel, an inlet of the drainage conduit being disposed within the cell culture vessel such that in use it is it located in the culture medium, and a pump (2) adapted to pump fresh culture medium from the fresh culture medium storage vessel (3) to one end of the cell culture vessel (5) and pump used culture medium from the second end of the cell culture vessel to the used culture medium collection vessel (4). The cell culture vessel (5) is generally not sealed to ambient, and the apparatus includes a pressure equalization conduit (11) adapted to provide fluid communication between a headspace of the used culture medium collection vessel (4) and a headspace of the fresh culture medium storage vessel (3).
摘要:
This invention relates to the field of microfluidic flow cytometry and more generally microfluidic techniques for analysis of particulate-containing fluids. It deals with the improvements to such technologies in order to identify subsets of particles or sub-populations of cells that differ in their properties, and, if necessary, separate the said identified sub-populations of cells, e.g. sex of semen cells, alive cells from the dead ones, cancerous cells from the healthy ones, subsets of viruses, bacteria or subsets of particles. This invention disclosure deals with the apparatus and the method for detection of cells or particles based on measurements of complex AC impedance between electrodes across the flow of fluid containing such cells or particles.