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E rosette formation by human t lymphocytes: a spontaneous cell mediated cytotoxic phenomenon
Immunological Communications
|January 1, 1976
Summary
Human T lymphocytes spontaneously associate with sheep erythrocytes, leading to significant cell lysis. This E rosette formation may initiate a T cell-mediated cytotoxic reaction against sheep red blood cells.
Area of Science:
- Immunology
- Cell Biology
Background:
- Spontaneous association between human T lymphocytes and sheep erythrocytes (E rosettes) is a known phenomenon.
- The cytotoxic potential of this interaction remains incompletely understood.
Purpose of the Study:
- To investigate the nature and significance of spontaneous T lymphocyte-sheep erythrocyte association.
- To determine if this association triggers a cytotoxic reaction.
Main Methods:
- Human T lymphocytes were incubated with 51Cr-labeled sheep erythrocytes.
- Various lymphocyte to erythrocyte ratios (5:1 and 10:1) were tested.
- Release of 51Cr into the supernatant was measured to quantify cell lysis.
Main Results:
- Mixing human lymphocytes and 51Cr-labeled sheep erythrocytes resulted in significant release of 51Cr (70-100%).
- This indicates substantial cell lysis occurred upon association.
Conclusions:
- E rosette formation is a crucial initial step in the observed phenomenon.
- This spontaneous association likely mediates a T cell-driven cytotoxic reaction against sheep erythrocytes.