Abstract:
Presented are intrinsically fluorescent, self-multimerizing MHC fusion proteins, and complexes assembled therefrom that are capable of detectably labeling antigen-specific T lymphocytes. Also presented are methods for labeling antigen-specific T lymphocytes with the intrinsically fluorescent complexes of the present invention, and methods, particularly flow cytometric methods, for detecting, enumerating, enriching, and depleting antigen specific T lymphocytes so labeled.
Abstract:
Improved methods, reagents, and kits for quantitation of HLA-DR and/or CD11b expression on peripheral blood cells are presented. Inclusion of a lysosomotropic amine, such as chloroquine, during staining stabilizes HLA-DR and CD11b expression. Use of a novel anti-CD14 conjugate, anti-CD14-PerCP/CY5.5, permits the ready discrimination of monocytes. The improved methods, reagents, and kits can be used to assess immune competence, and to direct and monitor immunostimulatory therapies in patients exhibiting monocyte deactivation.
Abstract:
Cells fixed with a fixative, reduced with a Schiff's base reducing agent and then dried in the presence of alpha - alpha -trehalose retain their light scatter and fluorescence properties and may be used, when rehydrated, as standards or controls in cellular analysis.
Abstract:
Cells fixed with a fixative, reduced with a Schiff's base reducing agent and then dried in the presence of alpha - alpha -trehalose retain their light scatter and fluorescence properties and may be used, when rehydrated, as standards or controls in cellular analysis.
Abstract:
Cells fixed with a fixative, reduced with a Schiff's base reducing agent and then dried in the presence of .alpha.-.alpha.-trehalose retain their light scatter and fluorescence properties and may be used, when rehydrated, as standards or controls in cellular analysis.
Abstract:
The inventors herein disclose new heterobifunctional chromophores that are capable of coupling with two distinct moieties. One moiety may be either a signal-enhancing agent or a blocking agent. The second moiety may be one member of a specific binding pair. The invention is based in part on the surprising result that when a chromophore is used as a "cross-linker" between a signal-enhancing agent and a member of a binding pair (essentially being buried between the two), the signal of the chromophore is not quenched. This arrangement, wherein the chromophore acts simultaneously as a cross-linker and a detectable compound, provides significant advantages over previously known compounds since the chromophore is sterically hindered from interacting non-specifically with substances present in the test systems. Moreover, the chromophore can be used as a cross-linker with little or no loss of detectable signal.
Abstract:
Presented are intrinsically fluorescent, self-multimerizing MHC fusion proteins, and complexes assembled therefrom that are capable of detectably labeling antigen-specific T lymphocytes. Also presented are methods for labeling antigen-specific T lymphocytes with the intrinsically fluorescent complexes of the present invention, and methods, particularly flow cytometric methods, for detecting, enumerating, enriching, and depleting antigen specific T lymphocytes so labeled.
Abstract:
A rapid, simple method for preparing beads for calibrating flow cytometers which contain a known number of fluorophores per bead is presented. Briefly, the invention utilizes beads coated with a stable complex of a fluorophore and an enzyme. the enzymatic activity of a known number of beads gives an accurate measure of fluorophore density on those beads.
Abstract:
The inventors herein disclose new heterobifunctional chromophores that are capable of coupling with two distinct moieties. One moiety may be either a signal-enhancing agent or a blocking agent. The second moiety may be one member of a specific binding pair. The invention is based in part on the surprising result that when a chromophore is used as a "cross-linker" between a signal-enhancing agent and a member of a binding pair (essentially being buried between the two), the signal of the chromophore is not quenched. This arrangement, wherein the chromophore acts simultaneously as a cross-linker and a detectable compound, provides significant advantages over previously known compounds since the chromophore is sterically hindered from interacting non-specifically with substances present in the test systems. Moreover, the chromophore can be used as a cross-linker with little or no loss of detectable signal.