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  • Title: Fixation and long-term storage of human lymphocytes for surface marker analysis by flow cytometry.
    Author: Lal RB, Edison LJ, Chused TM.
    Journal: Cytometry; 1988 May; 9(3):213-9. PubMed ID: 3132354.
    Abstract:
    A method to preserve stained human lymphocytes for subsequent cell surface analysis by flow cytometry (FCM) is described. Cells stained with fluorescein isothiocyanate (FITC) and phycoerythrin (PE)-conjugated monoclonal antibodies and then fixed in 1% paraformaldehyde, followed by extensive washing and resuspension in 1% BSA medium, could be stored at 4 degrees C for at least 2 weeks prior to FCM analysis without significant alteration in the light scatter or fluorescence properties of the cells. Furthermore, the method was also suitable for analyzing lymphocytes that express T-cell activation markers in certain disease conditions. In addition, we have identified monoclonal antibody combinations that discriminate different lymphocyte subsets that are satisfactory for multiparameter analysis after 2 weeks of storage. This method should prove useful for enumerating lymphocyte subsets in field study sites remote from flow cytometry laboratories.
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