Trypsin Passage
Trypsin Passage - Related Videos
09:38
Passaging HuES Human Embryonic Stem Cell-lines with Trypsin.
0 Views •
Cited by 1 •
2006
In this video we demonstrate how our lab routinely passages HuES human embryonic stem cell lines with trypsin. Brought to you by JoVE.
10:02
Passaging Cells
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2023
Cell lines are frequently used in biomedical experiments, as they allow rapid culture and expansion of cell types for experimental analysis. Cell lines are cultured under similar conditions when compared to freshly-isolated, or primary, cells, but with some basic important differences: (i) cell lines require their own specific growth factor cocktails and (ii) their growth must be more closely monitored than primary cells, as the mutations that allow them to be grown indefinitely also can...
05:59
Trypsinizing and Subculturing Mammalian Cells
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Cited by 7 •
2008
As cells reach confluency, they must be subcultured or passaged. This video will demonstrate a procedure for subculturing both adherent and suspension cells.
10:16
Passaging Human Neural Stem Cells
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Cited by 8 •
2007
The ability to manipulate human neural stem/precursor cells (hNSPCs) in vitro allows to investigate their utility as cell transplants for therapeutic purposes and to explore human neural development. This protocol presents a method of culturing and passaging hNSPCs in hopes of increasing reproducibility of human stem cell research.
09:03
Trypsin Digest Protocol to Analyze the Retinal Vasculature of a Mouse Model
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Cited by 59 •
2013
Trypsin digest is one of the most commonly used methods to analyze retinal vasculature. This manuscript describes the method in detail, including key alterations to optimize the technique and remove the non-vascular tissue while preserving the overall architecture of the vessels.
FAQs
Trypsin releases adherent cells by digesting proteins that connect the cell surface to the substrate and help neighboring cells remain attached. This proteolytic activity weakens those contacts sufficiently for transfer, but excessive digestion can compromise the cells. The key outcome is controlled detachment that supports continued culture without unnecessary damage to cell viability or function.
EDTA assists detachment by chelating, or binding, calcium. This can reduce the calcium available during the process and help trypsin weaken adhesion at the cell-surface and substrate interface. Using EDTA as an aid therefore supports release with less reliance on prolonged trypsin exposure in routine practice.
Brief exposure is important because trypsin must weaken adhesion without subjecting cells to unnecessary proteolytic activity. If treatment is poorly controlled, the balance between release and preservation may shift, affecting viability or cellular function. Researchers therefore treat exposure time and handling as critical variables when seeking healthy, reproducible cultures for downstream experiments.
After the cells detach, serum-containing medium is used to neutralize the remaining trypsin. This step limits continued proteolytic action after adhesion has been sufficiently weakened, helping protect the released population during transfer. Prompt neutralization is therefore part of maintaining cell viability and preserving function as cultures move into fresh vessels.
The process begins with brief exposure of the adherent culture to trypsin, often with EDTA assistance, until the cells are released from the growth surface. Serum-containing medium then neutralizes the enzyme, and the detached cells are transferred into fresh culture vessels. Controlled exposure and careful handling support healthy populations and reproducible culture expansion.
Moving detached cells into fresh vessels allows researchers to regulate the density of an expanding culture and prevent overconfluence. Maintaining an appropriate population distribution helps support continued growth and healthier cultures rather than allowing cells to remain crowded on the original surface. This density control also improves reproducibility between experiments.
Trypsin passage supports many studies that require continued expansion of adherent cell populations. Its applications include basic cell biology, investigations of disease mechanisms, drug-response studies, and tissue-engineering research. By helping generate reproducible cultures while maintaining healthy populations, the technique provides a practical foundation for experiments involving cellular behavior and responses.