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Comparative analysis of surface membrane immunoglobulin determination by flow cytometry and fluorescence microscopy

DF Gebhard , A Mittelman, C Cirrincione, HT Thaler and B Koziner

The analysis of membrane surface immunoglobulin (SmIg) on B lymphocytes was carried out in 59 normal individuals and nine patients with B-cell non-Hodgkin's lymphomas by conventional immunofluorescence microscopy and flow cytometry. Five channel settings of a cytofluorograph were evaluated (100, 150, 200, 250, 300) and the mean and standard deviation of the percent positive cells were calculated and compared to the mean and standard deviation of the microscope reading. On the basis of the relative fluorescence reactivity, we were able to determine a fluorescence intensity at which the results of flow cytometry and fluorescence microscopy were comparable. In normal individuals, for cells expressing surface Ia, the channel giving similar results to that of fluorescence microscopy was 150; for kappa and lambda chains, channel 200; for Fab'PV, channel 200; and for IgM, channel 250. In patients with B-cell non-Hodgkin's lymphomas, for cells expressing surface Ia the channel giving similar results to that of fluorescence microscopy was 100; for kappa, channel 100; for lambda, channel 200; for Fab'FV, channel 150; and for IgM, channel 150. Flow cytometric analysis of SmIg appears to be superior to fluorescence microscopy in efficiency, and has the added advantages of being a rapid, sensitive, and objectively quantitative methodology.

Volume 34, Issue 4, pp. 475-481, 04/01/1986
Copyright © 1986 by The Histochemical Society


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