Observed differences in postoperative lymphocyte transformation are explained by patient and population variations

Area of Science:

• Immunology
• Surgical Science

Background:

• Phytohemagglutinin (PHA) is a plant lectin used to stimulate lymphocyte proliferation.
• Previous studies suggested that surgical procedures may inhibit lymphocyte transformation in response to PHA.

Purpose of the Study:

• To investigate the kinetics of lymphocyte response to PHA in patients undergoing surgery.
• To determine if surgical stress affects lymphocyte transformation.

Main Methods:

• Lymphocytes were harvested at 24-hour intervals from control subjects, patients pre- and post-herniorrhaphy, and patients post-colectomy.
• Nonorthogonal analysis with logarithmic transformation and adjustments for individual and population variations was employed.

Main Results:

• No significant differences were observed in preoperative versus postoperative lymphocyte transformation in response to PHA.
• No age-related effects on lymphocyte transformation were detected.
• Observed kinetic variations within patient and control groups accounted for previous reports of surgical inhibition.

Conclusions:

• Surgical procedures, including herniorrhaphy and colectomy, do not appear to inhibit the lymphocyte response to PHA.
• Individual and population-level variations in lymphocyte kinetics are crucial factors in interpreting PHA response data.