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Effects of BCG on lymphocyte trapping
Journal of Immunology (Baltimore, Md. : 1950)
|June 1, 1976
Summary
Bacillus-Calmette Guerin (BCG) alters lymphocyte movement to the spleen and lymph nodes. This immune cell traffic regulation may explain how BCG enhances immune responses.
Area of Science:
- Immunology
- Cell Biology
Background:
- Bacillus-Calmette Guerin (BCG) is an immunotherapy agent.
- The impact of BCG on lymphocyte traffic is not fully understood.
Purpose of the Study:
- To investigate how Bacillus-Calmette Guerin (BCG) administration affects lymphocyte traffic in mice.
- To determine if BCG influences the immune response to sheep red blood cells (SRBC).
Main Methods:
- BALB/cJ mice were injected intravenously or subcutaneously with BCG.
- 51Cr-labeled syngeneic lymphocytes were used to track localization in spleen and lymph nodes.
- Subsequent challenge with SRBC was performed to assess immune response modulation.
Main Results:
- BCG injection increased lymphocyte trapping in the spleen and draining lymph nodes.
- BCG-induced splenic trapping showed a biphasic pattern, while lymph node trapping persisted.
- Prior BCG administration modulated SRBC-induced lymphocyte trapping, suppressing splenic trapping but enhancing lymph node trapping.
Conclusions:
- BCG significantly alters lymphocyte traffic patterns to lymphoid tissues.
- Regulation of lymphocyte traffic by BCG may be a key mechanism for immune response potentiation.