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Related Experiment Videos

[Impaired B lymphocyte function during open heart surgery].

K Hirai, T Shimomura, S Ishizaka

    Masui. the Japanese Journal of Anesthesiology
    |October 1, 1989
    PubMed
    Summary

    Cardiac surgery impairs B lymphocyte function, reducing immunoglobulin secretion and mitogen responses. While B cell numbers increase post-operation, their functional capacity is diminished, indicating immune system compromise.

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    Area of Science:

    • Immunology
    • Cellular Biology
    • Surgical Science

    Context:

    • Cardiac surgery can significantly impact immune function.
    • Understanding postoperative immune changes is crucial for patient recovery.
    • B lymphocyte responses are key indicators of adaptive immunity.

    Purpose:

    • To investigate the functional status of B lymphocytes following cardiac surgery.
    • To assess the impact of cardiac operations on B cell mitogenic and immunoglobulin secretion capabilities.
    • To evaluate changes in circulating B lymphocyte percentages post-cardiac surgery.

    Summary:

    • Sequential in vitro lymphocyte function tests were conducted on 13 patients before and after cardiac operations.
    • Lymphocytes were stimulated with phytohemagglutinin (PHA), pokeweed mitogen (PWM), and Staphylococcus aureus Cowan 1 (SAC), with responses measured by 3H-thymidine incorporation.

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  • Staphylococcus aureus Cowan 1 (SAC) responses were significantly depressed post-operation, and immunoglobulin-secreting cells induced by PWM or SAC decreased remarkably up to 3 days after surgery.
  • The percentage of circulating B lymphocytes increased significantly postoperatively, suggesting functional impairment of the remaining B cells.

    • Impact:

    • This study highlights the functional impairment of B lymphocytes after cardiac surgery.
    • Findings suggest that the B cells remaining in circulation post-operation are less capable of mounting an effective immune response.
    • The increased percentage of B cells alongside functional deficits indicates a potential vulnerability to infection or other complications.