Related Experiment Videos
In vitro migration of human large granular lymphocytes
Journal of Immunology (Baltimore, Md. : 1950)
|April 1, 1985
Summary
Large granular lymphocytes (LGLs) demonstrate rapid migration towards chemoattractants like casein and C5a, suggesting their role in early immune responses. This study characterizes LGL migration using a novel assay, providing insights into immune cell function.
Area of Science:
- Immunology
- Cell Biology
- Hematology
Background:
- Large granular lymphocytes (LGLs) are immune cells with poorly understood migratory functions.
- Understanding LGL migration is crucial for elucidating their role in host defense against pathogens and tumors.
Purpose of the Study:
- To characterize the migratory capacity of LGLs in response to specific chemoattractants.
- To develop and validate a novel migration assay for LGLs.
- To investigate the effect of interferon (IFN) on LGL migration.
Main Methods:
- Peripheral blood mononuclear cells were fractionated using Percoll gradients.
- A modified Boyden chamber assay was employed to measure cell migration towards chemoattractants (casein, C5a).
- Monoclonal antibodies (B73.1) and cell sorting were used to identify migrating cell populations.
Main Results:
- LGLs exhibited rapid migration in response to casein and C5a, dependent on chemoattractant gradients.
- High-density small lymphocytes showed limited migratory capacity under the same conditions.
- Migratory cells were identified as B73.1+ and OKT3-, confirming they were LGLs.
- Interferon (IFN) enhanced spontaneous LGL motility but not chemoattractant responsiveness.
Conclusions:
- The developed migration assay effectively characterizes LGL behavior.
- LGLs are rapidly mobilizable immune cells, likely involved in early defense mechanisms.
- IFN modulates LGL motility, suggesting a regulatory role in immune responses.