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Rh Blood Group01:19

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The Rhesus (Rh) antigen is crucial in determining blood groups and ensuring compatibility during blood transfusions.
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Antigens Protected Functional Red Blood Cells By The Membrane Grafting Of Compact Hyperbranched Polyglycerols
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Surface-anchored framework for generating RhD-epitope stealth red blood cells.

Yueqi Zhao1, Mingjie Fan2,3, Yanni Chen2,3

  • 1Center for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou 310027, China.

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|March 29, 2020
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Researchers engineered RhD-positive red blood cells (RBCs) to mask the Rhesus D antigen. This innovative surface shielding creates stealth red blood cells, addressing critical blood supply shortages for universal transfusion.

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Area of Science:

  • Biomedical Engineering
  • Immunology
  • Transfusion Medicine

Background:

  • Rhesus D (RhD) antigen is a major immunogenic factor on red blood cells (RBCs).
  • Shortages of RhD-negative blood are common, and converting RhD-positive to RhD-negative blood is challenging.

Purpose of the Study:

  • To develop a method for masking RhD antigens on RhD-positive RBCs.
  • To create 'stealth' RBCs for potential universal blood transfusion applications.

Main Methods:

  • Engineered RBCs using a flexible, surface-anchored chemical framework to shield RhD epitopes.
  • Evaluated the RhD-epitope stealth characteristics in mouse transfusion and rabbit immunostimulation models.

Main Results:

  • The chemical framework effectively obstructed RhD antigens on the RBC surface.
  • Engineered RBCs demonstrated stealth characteristics in vivo, confirmed by transfusion and immunostimulation studies.

Conclusions:

  • Developed an efficient methodology for engineering cell surfaces for universal blood transfusion.
  • Demonstrated the potential of cell surface engineering for transfusion and transplantation medicine.