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Primary immune cells are immune cells directly isolated from human or animal tissues, including peripheral blood mononuclear cells (PBMCs), T cells, B cells, NK cells, monocytes, macrophages, and dendritic cells.
Compared with immortalized cell lines, primary immune cells generally exhibit more physiologically relevant phenotypes, receptor expression patterns, and functional characteristics, making them particularly suitable for studies involving immune cell activation, differentiation, cell–cell interactions, immunopharmacology, and disease mechanisms.
Common Primary Immune Cells
| Cell Type | Major Source | Common Research Applications |
| PBMC (Peripheral Blood Mononuclear Cells) | Peripheral blood | Immune cell composition analysis, immune activation, drug evaluation, and disease research |
| Primary T Cells | PBMCs / Peripheral blood | T-cell activation, differentiation, cytotoxicity, CAR-T research, and immunotherapy |
| Primary B Cells | PBMCs / Peripheral blood | BCR signaling, B-cell activation, antibody production, and B-cell differentiation |
| Primary NK Cells | PBMCs / Peripheral blood | NK-cell activation, cytotoxicity, and anti-tumor immunity |
| Monocytes | PBMCs / Peripheral blood | Monocyte differentiation, inflammation, and macrophage generation |
| Macrophages | Monocytes / Tissues | Macrophage polarization, phagocytosis, inflammation, and tissue repair |
| Dendritic Cells (DCs) | PBMCs / Monocytes / Bone marrow | Antigen presentation, DC maturation, T-cell activation, and immune regulation |