The invention provides systems, including apparatus, methods, and kits, for the microfluidic manipulation and/or detection of particles, such as cells and/or beads. The invention provides systems, including apparatus, methods, and kits, for the microfluidic manipulation and/or analysis of particles,
The invention provides systems, including apparatus, methods, and kits, for the microfluidic manipulation and/or detection of particles, such as cells and/or beads. The invention provides systems, including apparatus, methods, and kits, for the microfluidic manipulation and/or analysis of particles, such as cells, viruses, organelles, beads, and/or vesicles. The invention also provides microfluidic mechanisms for carrying out these manipulations and analysis. These mechanisms may enable controlled input, movement/positioning, retention/localization, treatment, measurement, release, and/or output of particles. Furthermore, these mechanisms may be combined in any suitable order and/or employed for any suitable number of times within a system. Accordingly, these combinations may allow particles to be sorted, cultured, mixed, treated, and/or assayed, among others, as single particles, mixed groups of particles, arrays of particles, heterogeneous particle sets, and/or homogeneous particle sets, among others, in series and/or in parallel. In addition, these combinations may enable microfluidic systems to be reused. Furthermore, these combinations may allow the response of particles to treatment to be measured on a shorter time scale than was previously possible. Therefore, systems of the invention may allow a broad range of cell and particle assays, such as drug screens, cell characterizations, research studies, and/or clinical analysis, among others, to be scaled down to microfluidic size. Such scaled-down assays may use less sample and reagent, may be less labor intensive, and/or may be more informative than comparable macrofluidic assays.
대표청구항▼
1. A microfluidic device for exposing cells to a plurality of compounds comprising: (a) a cell inlet;(b) a plurality of cell chambers in fluidic communication with said cell inlet and at least one of the other cell chambers;(c) a plurality of chamber isolation valves, said isolation valves, when act
1. A microfluidic device for exposing cells to a plurality of compounds comprising: (a) a cell inlet;(b) a plurality of cell chambers in fluidic communication with said cell inlet and at least one of the other cell chambers;(c) a plurality of chamber isolation valves, said isolation valves, when actuated, fluidically isolating said chambers from each other;(d) a plurality of compound inlets and compound outlets, wherein each chamber is in fluidic communication with a compound inlet and a compound outlet, wherein each chamber includes a channel sized for retaining a single cell within said chamber;(e) a shared waste receptacle, said shared waste receptacle being configured to receive waste from said compound outlets;(f) a shared reagent reservoir, said shared reagent reservoir being configured to provide reagent to said chambers;(g) a plurality of compound outlet valves, said compound outlet valves configured to fluidically isolate said chambers from said shared waste receptacle and said shared reagent reservoir when closed;(h) a plurality of analysis sites, wherein each cell chamber has a corresponding analysis site, wherein each chamber is in fluidic communication with a respective analysis site via its channel;wherein the plurality of cell chambers includes a first cell chamber and a second cell chamber downstream from the first cell chamber,wherein the first cell chamber is configured to hold a first cell using a retaining force fluidically applied via its channel and thereby allow a second cell following the first cell to be diverted downstream along a shared cell input channel to the second cell chamber. 2. The device of claim 1 wherein at least one of said plurality of compounds is a cell toxic compound. 3. The device of claim 1 wherein said common reagent reservoir contains a detection agent responsive to a toxic response of said cells to one of said compounds. 4. The device of claim 1, wherein the plurality of cell chambers is arranged such that an entrance of each cell chamber following the first cell chamber is sequentially arranged downstream to the entrance of another cell chamber. 5. The device of claim 1, wherein the first cell chamber is physically sized to hold only a single cell according a size range encompassing each of the first and second cells, and thereby configured to only hold the first cell, which blocks the second cell from coupling to the first cell chamber. 6. The device of claim 1, wherein the fluidic retaining force fluidically applied to the channel prevents backflow of the first cell into the shared cell input channel while the second cell is flowed within the input channel. 7. The device of claim 1, wherein each chamber is in permanent fluidic communication with its respective analysis site via its channel. 8. The device of claim 1, wherein each channel comprises a switchable filter. 9. A method for determining whether one of a plurality of compounds causes a toxic response in one of a plurality of cells comprising the steps of: providing the device of claim 1;introducing said cells into said device of claim 1,isolating said cells within said chambers of said device of claim 1,exposing said cells to said plurality of said compounds while said cells are retained in said chambers,determining whether any of said cells had a toxic response resulting from exposure to one of said plurality of compounds.
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