Terumo Bct, Inc.

Nathan D Frank

Dennis J Hlavinka

Brian J Nankervis

Thomas G Dilorenzo

Mark E Jones

Embodiments described herein generally provide for the expansion of cells in a cell expansion system using an active promotion of a coating agent(s) to a cell growth surface in some embodiments. A coating agent may be applied to a surface, such as the cell growth surface of a hollow fiber in a bioreactor, by controlling the movement of a fluid in which a coating agent is suspended, by changing flow rates, by changing flow directions, by rotation of the bioreactor, and/or combinations thereof.

Coating a bioreactor in a cell expansion system

Embodiments described herein generally provide for the expansion of cells in a cell expansion system using an active promotion of a coating agent(s) to a cell growth surface. A coating agent may be applied to a surface, such as the cell growth surface of a hollow fiber, by controlling the movement of a fluid in which a coating agent is suspended. Using ultrafiltration, the fluid may be pushed through the pores of a hollow fiber from a first side, e.g., an intracapillary (IC) side, of the hollow fiber to a second side, e.g., an extracapillary (EC) side, while the coating agent is actively promoted to the surface of the hollow fiber. In so doing, the coating agent may be hydrostatically deposited onto a wall, e.g., inner wall, of the hollow fiber.

Methods and systems for coating a cell growth surface

Embodiments provide for introducing a first fluid into a bioreactor and while introducing the first fluid into the bioreactor, circulating a second fluid with a reagent at a first flow rate through the bioreactor. The bioreactor may be maintained in a first orientation for a first period of time to allow at least a first portion of the reagent to coat the bioreactor. The second fluid may then be circulated at a second flow rate slower than the first flow rate to allow a second portion of the reagent to coat the bioreactor. Introduction of the first fluid may promote coating of the bioreactor by ultrafiltration. The introduction of the first fluid may be stopped. A third fluid may be circulated through the bioreactor to remove a portion of the reagent not coated on the bioreactor.

Coating a bioreactor

Embodiments for coating a bioreactor with a reagent are described. The embodiments may provide for changing flow rates, direction of flow, and/or bioreactor rotation to enhance the coating of the bioreactor prior to growing cells in the bioreactor.

Described are embodiments for expanding cells in a bioreactor. In embodiments, methods and systems are provided that distribute cells throughout the bioreactor and attach cells to specific portions of a bioreactor to improve the expansion of the cells in the bioreactor. Embodiments may be implemented on a cell expansion system configured to load, distribute, attach and expand cells.

Expanding cells in a bioreactor

Described are embodiments for expanding cells in a bioreactor. In one embodiment, methods are provided that distribute cells throughout the bioreactor and attach cells to specific portions of a bioreactor to improve the expansion of the cells in the bioreactor. Embodiments may be implemented on a cell expansion system configured to load, distribute, attach and expand cells.

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Arvada, CO, United States of America

Nathan D Frank