Overview
HeLa cells are the first immortal human cell line, derived from cervical cancer cells taken from Henrietta Lacks in 1951. These cells have become a cornerstone of biomedical research due to their ability to proliferate indefinitely under laboratory conditions. Their unique properties have enabled breakthroughs in understanding cell biology, disease mechanisms, and therapeutic development. HeLa cells are widely distributed in research institutions globally and have contributed to key scientific advancements, including the development of the polio vaccine and cancer research. Their robustness and adaptability make them a standard model for in vitro studies.
Physical and Chemical Properties
HeLa cells exhibit typical eukaryotic cell characteristics, with a doubling time of approximately 24 hours under optimal conditions. They grow in monolayer cultures or suspension and can adapt to various culture media, including DMEM and RPMI-1640, supplemented with fetal bovine serum (FBS). These cells are known for their genetic variability due to years of cultivation, leading to multiple subtypes. They are highly proliferative and can survive in less-than-ideal conditions, making them resilient but also prone to contamination if not handled properly.
Main Applications
HeLa cells are extensively used in virology for studying viral replication and vaccine development, including research on HIV, HPV, and SARS-CoV-2. They serve as a model for cancer research, helping scientists understand tumor biology and test anticancer drugs. Additionally, HeLa cells are employed in toxicology studies, gene expression research, and cell signaling pathways. Their versatility has made them indispensable in high-throughput screening and biotechnology applications.
Safety and Storage
Handling HeLa cells requires biosafety level 2 (BSL-2) precautions due to potential contamination with human pathogens. Proper personal protective equipment (PPE), including gloves and lab coats, is essential. Cross-contamination with other cell lines is a common issue, necessitating strict aseptic techniques. For long-term storage, HeLa cells are cryopreserved in liquid nitrogen using cryoprotectants like DMSO. Short-term storage involves maintaining cultures in incubators at 37°C with 5% CO2, with regular media changes to ensure cell health.
B2B Procurement Guide
When procuring HeLa cells, verify the supplier's credibility and request certificates of analysis (CoA) confirming cell line authenticity and absence of mycoplasma contamination. Reputable suppliers include ATCC, Sigma-Aldrich, and Coriell Institute. Consider the intended use—some applications may require specific subtypes or genetically modified variants. Bulk purchases may offer cost savings, but ensure proper storage facilities are available. Shipping conditions (e.g., dry ice for cryopreserved cells) must be confirmed to maintain cell viability.