K562 Cell Line Profile
Quick Facts
| Feature | Information |
|---|---|
| Cell Line | K562 |
| Species | Human (Homo sapiens) |
| Tissue of Origin | Bone Marrow |
| Disease Association | Chronic Myeloid Leukemia (CML) |
| Cell Type | Hematopoietic Leukemia Cell |
| Growth Mode | Suspension |
| Morphology | Round, blast-like |
| Recommended Medium | RPMI-1640 + 10% FBS |
| Incubation Conditions | 37°C, 5% CO₂, ≥95% humidity |
| Typical Doubling Time | Approximately 18-24 hours |
| Major Applications | Leukemia Research, Hematopoiesis, NK Cell Assays, Drug Discovery, BCR-ABL Biology |
Overview
K562 is one of the most widely used human leukemia cell lines. Derived from a patient with chronic myeloid leukemia (CML) in blast crisis, it serves as a classic model for studying leukemia biology, hematopoietic differentiation, targeted therapies, and immune cell cytotoxicity. The defining feature of K562 cells is the presence of the BCR-ABL fusion gene, making them a cornerstone model for chronic myeloid leukemia research.
Origin and History
- Established from the bone marrow of a patient with chronic myeloid leukemia in blast crisis.
- One of the first human leukemia cell lines used to investigate oncogenic driver mutations.
- Played a major role in the development of targeted therapies against BCR-ABL.
Growth Characteristics
| Characteristic | Description |
|---|---|
| Growth Mode | Suspension |
| Morphology | Round, blast-like |
| Growth Pattern | Single cells or small aggregates |
| Doubling Time | Approximately 18-24 hours |
Culture Notes
K562 cells grow in suspension and should be maintained within the recommended density range to ensure optimal growth and differentiation potential. Overcrowding can reduce viability and alter experimental responses.
Biological Characteristics
BCR-ABL Fusion Gene
The hallmark feature of K562 cells is the presence of the Philadelphia chromosome (t(9;22)), which generates the BCR-ABL fusion protein.
This constitutively active tyrosine kinase promotes:
- Continuous cell proliferation
- Reduced apoptosis
- Enhanced survival signaling
K562 cells remain one of the primary models for studying BCR-ABL signaling and tyrosine kinase inhibitors.
Hematopoietic Differentiation
K562 cells retain the ability to differentiate toward multiple hematopoietic lineages under appropriate experimental conditions, particularly the erythroid lineage.
Researchers commonly study:
- Erythroid differentiation
- Hemoglobin expression
- Blood cell development
- Gene regulation during hematopoiesis
NK Cell Cytotoxicity
K562 cells are highly susceptible to Natural Killer (NK) cell-mediated cytotoxicity, making them the standard target cell line for:
- NK cell assays
- Cytotoxicity studies
- Immunotherapy research
Cell Signaling
Frequently investigated pathways include:
- BCR-ABL signaling
- JAK-STAT pathway
- PI3K-AKT pathway
- MAPK signaling
Culture Conditions
Recommended Medium
- RPMI-1640
- 10% Fetal Bovine Serum (FBS)
Incubation Conditions
| Parameter | Value |
|---|---|
| Temperature | 37°C |
| CO₂ | 5% |
| Relative Humidity | ≥95% |
Passaging
Maintain cultures within the recommended density range by dilution into fresh medium. Avoid prolonged overgrowth to preserve cell viability and reproducibility.
Major Applications
K562 cells are widely used for:
- Chronic myeloid leukemia research
- BCR-ABL signaling studies
- Hematopoietic differentiation
- NK cell cytotoxicity assays
- Drug discovery
- CRISPR and gene editing
- Functional genomics
- Targeted therapy research
Advantages
- Human-derived leukemia model
- Contains the clinically relevant BCR-ABL fusion gene
- Easy suspension culture
- Rapid growth
- Highly amenable to genetic manipulation
- Extensive experimental literature
Limitations
- Derived from advanced leukemia rather than normal hematopoietic cells
- Represents only one subtype and stage of leukemia
- Simplified in vitro system lacking the bone marrow microenvironment
- Long-term culture may alter cellular characteristics
Authentication and Quality Control
Cell Line Authentication
Routine authentication using Short Tandem Repeat (STR) profiling and verification of BCR-ABL expression is recommended to confirm cell identity.
Contamination Monitoring
Regular screening should include:
- Mycoplasma contamination
- Bacterial contamination
- Fungal contamination
Routine quality control is essential for reliable and reproducible experimental results.
Cryopreservation
K562 cells recover well following standard cryopreservation and thawing procedures. Maintaining low-passage master stocks is recommended for long-term experimental consistency.
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.