One of the most exciting new treatments coming to market is CAR-T cell therapy. This treatment utilizes reengineered T-cells tagged with a chimeric antigen receptor (CAR) to target patient’s cancer cells. As the Figure3describes,therearetwomethodsof CAR-T cell therapy, Autologous and Allogeneic.
Autologous therapy involves point to point infusion, taking cells from a sick patient, formulating them appropriately, then infusing back into the same patient. As you can imagine this requires supply chain intricacies to ensure that the one-to-one infusion is maintained. In addition, due to the long lead-time between collection and treatment as well as severity of disease progression in patients receiving CAR-T therapy, patients have passed before receiving their infusion.
Allogeneic therapy does not rely on point-to-point treatment but instead collects T-cells from healthy donors. Once cells are transduced with the viral vector (CAR) they can be inventoried for off the shelf infusion for many patients. While this simplifies the supply chain tracking and reduces the lead-time for treating a patient, Allogeneic therapies come with their own complexities. For example, identification of suitable donors that qualify for cell collection is incredibly difficult. Donors must not have been infected with a variety of different illnesses to ensure a consistent T-Cell is collected. In addition, there is high variation between donor cell yield during proliferation that is not yet fully understood.
Many of the raw materials and production facilities required for CAR-T therapy manufacturing stem from a small group of key suppliers (Lonza, Lentigen, WuXi, etc.). As the market continues to grow, these suppliers are forced to either expand their production capacities or selectively choose which customers will receive their goods/services. Of course, start-up demand is much smaller than that of a later stage company and without strategically partnering with big pharma companies that have “supplier pull” they may be considered second priority to suppliers. This leaves smaller biotech companies at a potential disadvantage. Figure 4 shows key suppliers across the supply chain.