THP-1 Cell Line
Repository ID: CL-HUM-011
Quick Facts
| Parameter | Information |
|---|---|
| Cell Line | THP-1 |
| Species | Human (Homo sapiens) |
| Tissue of Origin | Peripheral Blood |
| Disease Association | Acute Monocytic Leukemia |
| Cell Type | Monocyte-like |
| Growth Mode | Suspension |
| Morphology | Round, monocyte-like |
| Typical Medium | RPMI-1640 + 10% FBS |
| Doubling Time | 30-40 hours |
| Passage | Maintain at 2 × 10⁵ to 8 × 10⁵ cells/mL |
| Main Use | Innate immunity, macrophage differentiation, inflammation, and infection biology |
Overview
THP-1 is one of the most widely used human monocytic cell lines in immunology research. Derived from the peripheral blood of a patient with acute monocytic leukemia, THP-1 cells provide a robust model for studying innate immune responses, inflammatory signaling, and host-pathogen interactions.
A defining characteristic of THP-1 cells is their ability to differentiate into macrophage-like cells following chemical stimulation, allowing researchers to investigate both circulating monocytes and tissue macrophages within a single experimental system.
Origin
- Established from the peripheral blood of a patient with acute monocytic leukemia.
- Developed as a continuously proliferating human monocyte model.
- Widely used in immunology, inflammation, infection biology, and functional genomics.
Unique Biology
The hallmark feature of THP-1 cells is their ability to differentiate into macrophage-like cells following stimulation with Phorbol 12-Myristate 13-Acetate (PMA). Differentiated cells become adherent, increase in size, exhibit macrophage-like morphology, and display enhanced phagocytic activity, making THP-1 an excellent model for macrophage biology.
THP-1 cells express numerous pattern-recognition receptors, including Toll-like receptors (TLRs) and NOD-like receptors (NLRs), enabling detailed investigation of innate immune signaling, inflammatory pathways, and host-pathogen interactions.
Activated THP-1 cells produce inflammatory cytokines such as TNF-α, IL-1β, IL-6, and IL-8, making them one of the most widely used models for studying cytokine regulation and inflammatory diseases.
THP-1 cells are also extensively employed to investigate activation of the NLRP3 inflammasome, a critical regulator of innate immunity involved in infection, chronic inflammation, metabolic disorders, and autoimmune disease.
Culture Considerations
Typical culture conditions include:
- RPMI-1640 Medium
- 10% Fetal Bovine Serum
- 37°C
- 5% CO₂
THP-1 cells grow as suspension cultures and are maintained by regular dilution rather than enzymatic passaging. Cell density should generally be maintained between 2 × 10⁵ and 8 × 10⁵ cells/mL to ensure optimal growth and reproducible immune responses. PMA-differentiated cells become adherent and should be handled accordingly during downstream experiments.
Major Applications
THP-1 cells are extensively used for:
- Monocyte biology
- Macrophage differentiation
- Innate immune signaling
- Cytokine biology
- Inflammasome research
- Host-pathogen interactions
- Atherosclerosis research
- Cancer immunology
- Drug discovery
Strengths
- Well-established human monocyte model
- Differentiates into macrophage-like cells
- Excellent model for innate immune signaling
- Highly reproducible experimental responses
- Extensive scientific literature support
Limitations
- Derived from leukemic rather than normal primary monocytes
- PMA-induced macrophages do not fully replicate tissue macrophages
- Simplified immune system lacking interactions with other cell types
- Certain signaling responses differ from primary human immune cells
References
- Freshney RI. Culture of Animal Cells: A Manual of Basic Technique and Specialized Applications.
- ATCC Cell Line Database.
- Cellosaurus Cell Line Knowledgebase.
- ECACC Cell Line Collection.
- Tsuchiya S et al. International Journal of Cancer. 1980.