Studies on difference in cellular immune-response between the human tonsil and blood lymphocytes

Area of Science:

• Immunology
• Cellular Immunology
• Lymphocyte Biology

Background:

• Tonsils are a key site for immune responses.
• Understanding lymphocyte function in different tissues is crucial for immunology.

Purpose of the Study:

• To investigate the differential immune responses of tonsillar versus blood lymphocytes.
• To compare the functional capabilities of lymphocytes from the tonsils and peripheral blood.

Main Methods:

• Separation of viable lymphocytes from tonsils and blood of tuberculin-sensitive patients.
• Assessment of lymphocyte responses to purified protein derivative (PPD), phytohemagglutinin (PHA), and pokeweed mitogen (PWM).
• Evaluation of the role of adherent cells in lymphocyte stimulation.

Main Results:

• Blood lymphocytes showed a significantly better response to PPD in the absence of adherent cells compared to tonsillar lymphocytes.
• Both tonsillar and blood lymphocytes responded to PHA and PWM, regardless of adherent cells.
• Pokeweed mitogen (PWM) stimulation resulted in greater 3H-TdR incorporation in tonsillar lymphocytes than in blood lymphocytes.
• Lymphocytes reacting to homologous cells were found in both tonsils and blood.

Conclusions:

• Tonsillar and blood lymphocytes exhibit distinct functional characteristics and potentially different maturation processes.
• The presence of specific lymphocyte subpopulations may account for the observed differences in immune cell function between tonsils and blood.