Related Experiment Videos
High T cell colony numbers do not reflect immune competence
Experimental Hematology
|May 1, 1981
Summary
T cell colony counts, unlike thymidine uptake, reveal immune competence by assessing lymphocyte aggregation. This method offers a novel way to evaluate cellular immune function, particularly in immune-deficient patients.
Area of Science:
- Immunology
- Cell Biology
Background:
- Assessing T cell function is crucial for monitoring immune competence.
- Current methods like 3H-thymidine uptake may not fully capture T cell behavior.
Purpose of the Study:
- To compare T cell colony formation with 3H-thymidine uptake in normal donors.
- To investigate factors influencing T cell colony growth patterns.
Main Methods:
- Comparing T cell colony counts and 3H-thymidine uptake in 133 normal donors.
- Observing colony morphology (size, aggregation) and correlating with immune status.
- Assessing the effect of irradiation on cell aggregation.
Main Results:
- T cell colony number and 3H-thymidine uptake did not correlate.
- Cellular aggregation led to fewer, larger colonies in individuals with presumed good T cell function.
- Reduced aggregation and smaller, scattered colonies were observed in elderly individuals, those with low PHA response, and patients with immune deficiency post-bone marrow transplant.
Conclusions:
- T cell colony number is influenced by lymphocyte aggregation, not just mitogen response.
- Lymphocyte aggregation is a sensitive indicator of cellular immune competence, potentially superior to thymidine incorporation.
- This aggregation phenomenon warrants further investigation as a key immune marker.