Leucocyte migration fibrinolysis technique (LMFT): description of a method.

Human leucocytes can migrate in a gel medium consisting of fibrin, 10% horse serum and tissue culture medium 199. The cells migrate within the fibrin gel mass. The 24 h. areas of migration depend upon the volume and concentration of the cell suspension applied on the fibrin gel. The amount of cells per mm2 migration culture area is less than half the amount used in the leucocyte migration agarose test. The results are reproducible, the standard variation of the migration areas is below 10%. The method is potentially useful for several purposes such as for measuring fibrinolytic and migratory activity of granulocytes, monocytes and lymphocytes and modification of these functions by lymphokines.