Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving antigen-antibody binding – specific binding protein...
Patent
1995-03-17
1997-08-12
Saunders, David
Chemistry: molecular biology and microbiology
Measuring or testing process involving enzymes or...
Involving antigen-antibody binding, specific binding protein...
435 29, 435 39, C12Q 102, G01N 3350
Patent
active
056564465
ABSTRACT:
The ability of mononuclear leukocytes to respond to standard stimuli is measured based on the expression of activation antigens on mononuclear cell subclasses. In a preferred embodiment, a sample of mononuclear leukocytes is cultured for up to 24 hours with a standard stimulus known to activate such cells. After culturing, aliquots of the cells are incubated with fluorophore-conjugated monoclonal antibodies to antigenic determinants of a particular mononuclear subclass and different fluorophore-conjugated monoclonal antibodies to particular activation antigens. The incubated aliquots are analyzed on a flow cytofluorometer, whereby each cell is illuminated with a particular light (e.g. argon ion laser), which detects and measures forward light scatter, orthogonal light scatter and two different wavelengths of light emitted from the fluorophores. These parameters are used to identify and enumerate the cells of different subclasses present within the mononuclear leukocyte sample, the cells of said subclasses which have been induced to express a particular activation antigen and the quantity of the activation antigen on said cells. An analysis of these enumerations is shown to correlate with the immunoregulatory status of the mononuclear leukocyte immune system. Data generation and analysis can be performed using a flow cytofluorometric apparatus with data and control signal processing to ensure accuracy and reproducibility of the results of the assay.
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