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Related Experiment Videos

Effect of surgical trauma on delayed type hypersensitivity.

P Kinnaert, A Mahieu, M Mahieu

    The Journal of Surgical Research
    |March 1, 1983
    PubMed
    Summary

    Surgery significantly depresses the delayed type hypersensitivity (DTH) immune response in rats, impacting the peak response rather than delaying it. This suggests surgical procedures affect the early stages of the immune reaction.

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    Area of Science:

    • Immunology
    • Surgical Research
    • Animal Models

    Background:

    • The impact of surgical procedures on the immune system, specifically delayed type hypersensitivity (DTH), remains incompletely understood.
    • Existing literature presents conflicting findings regarding the effects of surgery on DTH responses.

    Purpose of the Study:

    • To investigate the effect of a standard laparotomy on DTH in a rat model.
    • To quantify the impact of surgery on DTH response magnitude and timing.

    Main Methods:

    • A standard laparotomy was performed on rats.
    • Delayed type hypersensitivity was assessed using the ear index method.
    • Animals were challenged either during the operation or 24 hours post-operatively.

    Main Results:

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    • Surgery significantly reduced the ear index in rats challenged at the time of operation (2.35 +/- 0.24) compared to controls (6.30 +/- 1.26).
    • A significant reduction was also observed in rats challenged 24 hours post-operation (2.69 +/- 0.21 vs 4.34 +/- 0.64).
    • The observed reduction represents a decrease in the peak immune response, not a delay.

    Conclusions:

    • A standard laparotomy significantly suppresses the DTH response in rats.
    • Surgery appears to primarily affect the early phase of the immune response, diminishing its peak.
    • No late rebound or compensatory increase in the immune response was observed post-surgery.