Sequential processing of biological fluids
A process for the sequential processing of opaque and transparent biological fluids such as whole blood, apheresis blood, bone marrow blood, umbilical cord blood, buffy coat or cultured cells by processing steps in a hollow cylindrical centrifugal processing chamber ( 300 ) which is part of a disposable set. At least three different procedures selected from washing, incubation, transduction, separation, density gradient separation, dilution and volume adjustment are each carried out once or repeated a number of times according to a given processing profile in the processing chamber. Each procedure involves an input into the processing chamber, an operation in the processing chamber and an output from the processing chamber by displacement of a piston ( 310 ). The at least three different procedures are sequentially chained one after the other to constitute an overall sequential operation in the processing chamber and its disposable set. A first application is incubation for binding magnetic beads with human blood cells or stem cells. A second application is transduction by which foreign genetic material is inserted into human blood cells or stem cells by a virus. A third application is reconditioning biological fluids to achieve reproducible concentration and volumes of blood cells or stem cells.
1. A system for sequentially processing biological fluids comprising:
(a) a cabinet defining at least one flat side provided with two external pinch valves having slots for accommodating tubing and controlling passage of fluid through tubing in the slots; and
(b) a disposable set disposed within the cabinet comprising,
(i) a cylindrical centrifugal processing chamber having a movable member being disposed within the centrifugal processing chamber and defining a separation space in an upper portion of the processing chamber;
wherein, the movable member is axially movable to vary the volume of the separation space within the processing chamber to intake or to output fluid into or from the separation space;
(ii) a set of inputs connected to the processing chamber via tubing at one end, and connected to a plurality of solution bags containing biological fluids or additives to be transferred into the processing chamber at an opposite end wherein respective tubing from two solution bags of the plurality of solution bags passes through the respective slots of the two external pinch valves; and
(iii) a central valve connected to the processing chamber and the inputs via tubing, the tubing having a plurality of pinch valves, wherein the central valve is a five-way valve;
wherein the central valve is connected to (a) a waste bag of the disposable set via tubing, (b) a collection bag of the disposable set via tubing, (c) to the two solution bags of the plurality of solution bags; and (d) to a set of outputs via tubing branched off from the collection bag,
wherein, the arrangement of pinch valves and the central valve facilitates an automated and sequential transfer of each of the biological fluids and the additives to the processing chamber and is configured to perform in the processing chamber a chained sequence comprising at least three different sequentially chained procedures by operating the pinch valves and the central valve to direct flow through the tubing between the inputs, the waste bag, the collection bag, and the outputs,
wherein the chained sequence constituting an overall sequential operation in the processing chamber comprises one of the following sequences of procedures (i), (ii) and (iii):
(i) pre-washing; addition of reagents and incubation; post-washing,
(ii) washing; dilution; centrifugal separation; dilution; volume adjustment of the product, and
(iii) preliminary thawing; washing; sampling and dilution; volume adjustment/extraction.
2. The system of claim 1 , wherein procedures selected from washing, incubation, transduction, separation, density gradient separation, dilution and volume adjustment, are carried out by the system.
3. The system of claim 2 , wherein each of the procedures is carried out once or repeated a number of times according to a given processing profile in the processing chamber of the disposable set.
4. The system of claim 1 , wherein the biological fluids include whole blood, apheresis blood, bone marrow blood, umbilical cord blood, buffy coat and cultured cells.
5. The system of claim 1 , wherein the movable member is a piston.
6. The system of claim 1 , wherein the following procedures are carried out sequentially: pre-washing; addition of reagents and incubation; post-washing.
7. The system of claim 6 , wherein the application of the procedures is for binding magnetic beads with human blood cells or stem cells.
8. The system of claim 1 , wherein the following procedures are carried out sequentially: washing; dilution; centrifugal separation; dilution; volume adjustment of the product.
9. The system of claim 8 , wherein the application of the procedures is for virus transduction with lymphocytes T-cells or other human cells.
10. The system of claim 1 , wherein the following procedures are carried out sequentially: preliminary thawing; washing; sampling and dilution; volume adjustment/extraction.
11. The system of claim 10 , wherein the application of the procedures for recondition dosing of multiple doses of cellular products.
12. The system of claim 1 , wherein the position of the movable member is monitored by an infrared sensor.
13. The system of claim 1 , wherein the volume of liquids treated in the processing chamber of the disposable set for one overall sequential operation is from four to sixteen times the maximum treatment volume of the processing chamber.
14. The system of claim 1 , wherein the two solution bags respectively comprise two biological additives.