Modifying the red cell surface: towards an ABO-universal blood supply

Area of Science:

• Biotechnology
• Hematology
• Enzymology

Background:

• ABO-incompatible transfusions pose significant risks.
• Current blood inventory logistics are complex.
• Previous enzymatic methods for creating universal O type red blood cells (RBCs) were inefficient.

Purpose of the Study:

• To review the advancements in enzymatic conversion of A and B antigens on RBCs to achieve universal O type.
• To discuss the impact and potential clinical integration of this technology.

Main Methods:

• Utilizing novel bacterial exoglycosidases for efficient A and B antigen cleavage.
• Optimizing enzymatic conversion for reduced enzyme consumption, shorter incubation, and neutral pH.

Main Results:

• New bacterial enzymes demonstrate significantly improved kinetic properties and efficiency.
• Enzymatic conversion of A, B, and AB RBCs to O type (ECO RBCs) is now economically viable.
• Clinical trials are underway to evaluate the safety and efficacy of ECO RBCs.

Conclusions:

• Enzymatic conversion technology has matured, offering a viable solution for universal blood products.
• ECO RBCs have the potential to revolutionize transfusion medicine and blood banking.
• Further clinical evaluation is crucial for the widespread adoption of ECO technology.