HeLa Cell Line
Repository ID: CL-HUM-002
Quick Facts
| Parameter | Information |
|---|---|
| Cell Line | HeLa |
| Species | Human (Homo sapiens) |
| Tissue of Origin | Cervix |
| Disease Association | Cervical Adenocarcinoma |
| Cell Type | Epithelial-like |
| Growth Mode | Adherent |
| Morphology | Polygonal, epithelial-like |
| Typical Medium | DMEM or MEM + 10% FBS |
| Doubling Time | 20-24 hours |
| Passage | 70-90% confluency |
| Main Use | Cancer biology and virology research |
Overview
HeLa is the world's first immortal human cell line and remains one of the most influential tools in biomedical research. Established in 1951 from the cervical tumor of Henrietta Lacks, HeLa cells transformed experimental biology by providing the first continuously growing human cell culture.
Today, HeLa cells are widely used in cancer biology, virology, molecular biology, drug discovery, and cell biology because of their rapid growth, robustness, and extensive experimental characterization.
Origin
- Established in 1951 from the cervical tumor of Henrietta Lacks.
- The first human cell line successfully propagated indefinitely in culture.
- Derived from a cervical adenocarcinoma containing integrated Human Papillomavirus type 18 (HPV18).
Unique Biology
The immortal nature of HeLa cells results from integration of HPV18 DNA into the genome.
Two viral oncoproteins drive continuous proliferation:
- E6, which promotes degradation of the tumor suppressor p53.
- E7, which disrupts the Retinoblastoma (Rb) pathway and removes normal cell-cycle control.
As a result, HeLa cells divide indefinitely and exhibit extensive chromosomal abnormalities. Although they originated from cervical tissue, they should not be considered representative of normal cervical epithelial cells.
Culture Considerations
Typical culture conditions include:
- DMEM or MEM
- 10% Fetal Bovine Serum
- 37°C
- 5% CO₂
HeLa cells grow rapidly as an adherent monolayer and are typically passaged at 70-90% confluency using split ratios of approximately 1:5 to 1:10.
One important consideration is their aggressive growth. If laboratory practices are poor, HeLa cells can overgrow slower-growing cultures and contaminate other cell lines.
Major Applications
HeLa cells are extensively used for:
- Cancer biology
- Cell cycle research
- Virology
- HPV biology
- Gene expression studies
- CRISPR/Cas9 genome editing
- Drug discovery
- High-throughput screening
- Vaccine research
- Cytotoxicity testing
Landmark Contributions
HeLa cells have contributed to numerous scientific breakthroughs, including:
- Development of the polio vaccine
- Cell cycle research
- Chromosome biology
- Virology
- Cancer biology
- Early space biology experiments
Few cell lines have contributed more broadly to modern biomedical research.
Strengths
- Rapid growth
- Easy to culture
- Highly robust
- Extensive scientific literature
- Well-established experimental protocols
- Suitable for a wide range of molecular biology techniques
Limitations
- Cancer-derived and genetically abnormal
- Highly aneuploid
- Altered signaling pathways compared with normal cells
- Not representative of healthy cervical tissue
- Prone to contaminating other cell cultures if good laboratory practice is not followed
References
- Gey GO, Coffman WD, Kubicek MT. Cancer Research. 1952.
- Adey A, et al. Nature. 2013.
- Freshney RI. Culture of Animal Cells: A Manual of Basic Technique and Specialized Applications.
- ATCC Cell Line Database.
- Cellosaurus Cell Line Knowledge Resource.
- ECACC Cell Line Collection.
- Skloot R. The Immortal Life of Henrietta Lacks.