Neutrophil migration-inhibition activity produced by a unique T lymphoblast cell line

Fifteen lymphoblast cell lines, including B cell, T cell, Null cell, and myeloblast cells, were examined for the production of human neutrophil migration-inhibition activity. Only one T lymphoblast cell line established from a patient with hairy cell leukemia produced a neutrophil migration-inhibition factor spontaneously and after stimulation with Con A and PHA.