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Related Experiment Video

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Immunostaining-Based Detection of Dynamic Alterations in Red Blood Cell Proteins

Immunostaining-Based Detection of Dynamic Alterations in Red Blood Cell Proteins

Published on: March 17, 2023

Evolution of adverse changes in stored RBCs.

Elliott Bennett-Guerrero¹, Tim H Veldman, Allan Doctor

¹Department of Anesthesiology, Duke Clinical Research Institute, Duke University Medical Center, Durham, NC 27710, USA.

Proceedings of the National Academy of Sciences of the United States of America

|October 18, 2007

Summary

Stored red blood cells (RBCs) rapidly lose S-nitrosohemoglobin (SNO-Hb), impairing hypoxic vasodilation. These changes, occurring even in fresh blood, may explain adverse outcomes associated with RBC transfusion.

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Area of Science:

Biomedical Science
Hematology
Physiology

Background:

Red blood cell (RBC) transfusion is critical but carries risks.
Understanding molecular and functional changes in stored RBCs is key to improving transfusion safety.
S-nitrosohemoglobin (SNO-Hb) plays a vital role in regulating blood flow via hypoxic vasodilation.

Purpose of the Study:

To analyze the molecular and functional changes in stored RBCs.
To investigate the time course of RBC deformability, vasoregulatory function, and SNO-Hb levels during storage.
To correlate these changes with potential adverse outcomes of RBC transfusion.

Main Methods:

Collected blood from 15 healthy volunteers and processed into leukofiltered RBCs.
Stored RBCs at 1-6°C according to AABB standards for up to 42 days.
Assessed RBC deformability, RBC-dependent vasodilation, and SNO-Hb levels at multiple time points using various assays.

Main Results:

RBC SNO-Hb decreased rapidly within 3 hours of storage and remained low throughout the 42-day period.
RBC-dependent vasodilation was significantly depressed in stored RBCs.
RBC deformability gradually decreased over the storage period.

Conclusions:

Stored RBCs exhibit rapid declines in SNO-Hb and impaired vasodilation, even in "fresh" units.
These storage-induced defects may contribute to adverse outcomes observed after RBC transfusion.
Further research is needed to mitigate these changes and enhance transfusion safety.