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Abnormal migration of T lymphocyte clones.
Journal of Immunology (Baltimore, Md. : 1950)
|May 1, 1982
Summary
Certain T cell clones struggle to reach lymph nodes due to missing receptors for high endothelial venules (HEV). This impaired lymphocyte circulation may affect their function when transferred into the body.
Area of Science:
- Immunology
- Cell Biology
- Lymphocyte Trafficking
Background:
- T cells are crucial for adaptive immunity.
- Normal lymphocyte homing to lymphoid tissues is essential for immune surveillance and response.
- Defective homing can impair T cell function in vivo.
Purpose of the Study:
- To investigate the homing capabilities of various in vitro T cell clones.
- To identify potential mechanisms underlying abnormal lymphocyte circulation patterns.
- To understand the implications of impaired T cell homing for adoptive transfer therapies.
Main Methods:
- Generation and characterization of multiple T cell clones in vitro.
- Assessment of T cell homing to peripheral lymphoid tissues.
- Analysis of T cell binding to high endothelial venules (HEV) using frozen lymph node sections.
Main Results:
- Several T cell clones exhibited a marked deficiency in homing to peripheral lymphoid tissues.
- These deficient clones showed a lack of binding to HEV in lymph node and Peyer's patch sections.
- The observed abnormal circulation pattern correlated with the absence of HEV receptors on T cells.
Conclusions:
- The lack of lymphocyte-HEV receptors is a likely cause of impaired T cell homing.
- Defective lymphocyte migration due to lost surface receptors can significantly alter the in vivo function of adoptively transferred T cells.
- Understanding these mechanisms is critical for improving adoptive T cell-based immunotherapies.