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Diaspirin crosslinked hemoglobin (DCLHb) polymerization

T T Hai1, D Nelson, D Pereira

  • 1Blood Substitutes Program, Baxter Healthcare Corporation, Round Lake, IL 60073.

Artificial Cells, Blood Substitutes, and Immobilization Biotechnology
|January 1, 1994
PubMed
Summary
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Researchers precisely controlled diaspirin crosslinked hemoglobin (DCLHb) polymerization using novel agents. This allowed targeted adjustments to oxygen binding (P50) and surface modification for various applications.

Area of Science:

  • Biochemistry
  • Polymer Chemistry
  • Biomaterials Science

Background:

  • Hemoglobin-based oxygen carriers (HBOCs) are investigated as blood substitutes.
  • Controlling hemoglobin properties like oxygen affinity and surface characteristics is crucial for efficacy.
  • Diaspirin crosslinked hemoglobin (DCLHb) offers a platform for modification.

Purpose of the Study:

  • To develop methods for selective modification and polymerization of DCLHb.
  • To achieve precise control over DCLHb oxygen-binding properties (P50).
  • To enable distinct surface modification ('decoration') of polymerized DCLHb.

Main Methods:

  • Utilized proprietary polymerization agents with specific binding groups.
  • Performed DCLHb polymerization under controlled, specific conditions.

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  • Implemented site-specific modification techniques.

    • Main Results:

    • Achieved selective polymerization and/or surface modification of DCLHb.
    • Successfully adjusted the P50 of DCLHb to physiological or shifted ranges.
    • Demonstrated the ability to polymerize DCLHb without decoration, and vice versa.
    • Showcased site-specific modification in conjunction with polymerization.

    Conclusions:

    • Proprietary agents and controlled conditions enable precise DCLHb engineering.
    • Tunable oxygen affinity and surface properties of DCLHb were achieved.
    • This work provides a versatile platform for developing advanced hemoglobin-based materials.