[Isolation of monocytes from peripheral blood by gradient centrifugation on Lymphoprep in a hypertonic medium].

The author describes a new method of isolation of monocytes from peripheral blood, involving hypertonization of the blood and isolation of monocytes by centrifuging above a gradient of hypertonic Lymphoprep. The method makes it possible to obtain a monocyte suspension with at least 85% cells; there are no B lymphocytes in the suspension and the monocytes are not damaged. The quality of the thus obtained monocytes was tested by examination with monocytic sera and with HLA-DR antibodies, whereby the test was concurrently made with monocytes obtained by adherence and with B lymphocytes.