Human peripheral blood CD56+ natural killer cell subsets and their phenotypic and biological properties.
- Author:
Chang-you WU
1
;
Jie LIU
;
Bin-yan YANG
;
Mario ROEDERE
Author Information
- Publication Type:Journal Article
- MeSH: CD56 Antigen; metabolism; CD8 Antigens; metabolism; Granzymes; metabolism; Humans; Killer Cells, Natural; classification; immunology; metabolism; Lymphocyte Subsets; immunology; Perforin; metabolism; Phenotype; fas Receptor; metabolism
- From: Chinese Journal of Oncology 2006;28(3):169-172
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo characterize the phenotypic and biological properties of CD56(+) natural killer cells from human peripheral blood mononuclear cells (PBMCs).
METHODSSurface markers and intracellular cytotoxic molecules were stained with multi-color-labeled monoclonal antibodies and analyzed at the single cell level the relation between NK subsets and biological characteristics by flow cytometry.
RESULTSNK cells in PBMCs could be divided into two major populations, CD56(bright) and CD56(dim), based upon the expression of CD56 molecules. Both CD56(bright) and CD56(dim) expressed CD95 (Fas) with CD95(bright) and CD95(dim) subsets. CD56(dim) subsets had higher percentage of CD8, granzyme B and perforin expression compared to those of CD56(bright) subsets. In CD56(bright) and CD56(dim) subpopulations, CD95(bright) and CD8(+) subsets had higher percentage of granzyme B and perforin expression.
CONCLUSIONCD56(+) NK cells in PBMCs are composed of distinct subpopulations, CD56(dim) and CD56(dim) CD8(+) NK subsets have higher percentage of granzyme B and perforin and may play an important role in the killing of target cells.
