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Haemoglobin-vesicles as artificial oxygen carriers: present situation and future visions
1Oxygen Infusion Project, Advanced Research Institute for Science and Engineering, Waseda University, Tokyo, Japan.
Journal of Internal Medicine
|November 29, 2007
Summary
Artificial oxygen carriers called hemoglobin-vesicles (HbV) overcome side effects of earlier hemoglobin-based oxygen carriers (HBOCs). Animal tests show HbV are effective transfusion alternatives with potential for clinical use.
Area of Science:
- Biomedical Engineering
- Hematology
- Biotechnology
Background:
- Hemoglobin-based oxygen carriers (HBOCs) have historically presented side effects, highlighting the importance of red blood cell structure.
- Previous HBOCs faced challenges including stability, circulation compatibility, and immune system clearance.
Purpose of the Study:
- To develop artificial oxygen carriers, termed hemoglobin-vesicles (HbV), that encapsulate hemoglobin within a lipid membrane.
- To address and overcome the limitations of earlier HBOCs and HbV formulations.
Main Methods:
- Encapsulation of concentrated hemoglobin solution within a thin lipid membrane to create HbV.
- Evaluation of HbV stability for storage and blood circulation.
- Assessment of blood compatibility and degradation kinetics within the reticuloendothelial system.
- In vivo testing in animal models to determine efficacy.
Main Results:
- HbV demonstrated improved stability for storage and during blood circulation compared to previous HBOCs.
- HbV exhibited good blood compatibility and predictable degradation.
- Animal studies confirmed the efficacy of HbV as a potential blood transfusion alternative.
Conclusions:
- HbV represent a significant advancement in artificial oxygen carrier technology.
- The developed HbV overcome key limitations of earlier HBOCs, showing promise for clinical applications.
- Further development of HbV is warranted, with expectations for eventual clinical realization.
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