Compartment dependence of T-lymphocyte motility

Area of Science:

• Immunology
• Cell Biology

Background:

• Fresh human T lymphocytes from blood exhibit limited motility on plastic surfaces.
• T-cell chronic lymphocytic leukemia (TCLL) cases show higher T lymphocyte motility than healthy individuals.
• Human splenic T lymphocytes display significantly greater motility than blood T lymphocytes.

Purpose of the Study:

• To investigate factors regulating T lymphocyte motility.
• To compare motility of blood T lymphocytes versus splenic T lymphocytes.
• To determine the effect of substrate and culture conditions on T lymphocyte motility.

Main Methods:

• Assessing T lymphocyte motility (nonspherical shape, lamellar surface activity) on plastic and collagen substrates.
• Comparing motility of T lymphocytes from peripheral blood and spleen.
• Evaluating the impact of collagen matrix culture on T lymphocyte motility.

Main Results:

• Blood T lymphocytes exhibit poor motility on plastic, while splenic T lymphocytes show high motility.
• Spleen T cells migrate faster into a collagen matrix than blood T cells.
• Culture on a collagen matrix significantly increases blood T lymphocyte motility, comparable to splenic T cells, independent of serum or cell interactions.

Conclusions:

• T lymphocyte motility is influenced by their location within the body (blood vs. spleen).
• The substratum plays a critical role, with collagen matrix enhancing motility.
• Collagen-mediated potentiation of motility is not due to polyclonal T-cell activation.