Cellular Viability
Cellular Viability - Related Videos
07:05
Viability of Bioprinted Cellular Constructs Using a Three Dispenser Cartesian Printer
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Cited by 6 •
2015
A Cartesian bioprinter was designed and fabricated to allow multi-material deposition in precise, reproducible geometries, while also allowing control of environmental factors. Utilizing the three-dimensional bioprinter, complex and viable constructs may be printed and easily reproduced.
12:03
Viability Assays for Cells in Culture
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Cited by 39 •
2014
Therapeutic compounds are often first examined in vitro with viability assays. Blind cell counts by a human observer can be highly sensitive to small changes in cell number but do not assess function. Computerized viability assays, as described here, can assess both structure and function in an objective manner.
05:47
Counting and Determining the Viability of Cultured Cells
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Cited by 19 •
2008
Determining the number of cells in culture is important in standardization of culture conditions and in performing accurate quantitation experiments. In this video, we demonstrate how cells are counted using a hemacytometer.
02:38
Fluorescence-Based Viability Assessment of Oral Anaerobic Bacteria
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2026
Source: Calatayud Arroyo, M., et al. Assessing the Viability of a Synthetic Bacterial Consortium on the In Vitro Gut Host-microbe Interface. J. Vis. Exp. (2018)The video demonstrates a method to evaluate the viability of anaerobic oral bacteria using fluorescent dyes and flow cytometry. It begins with culturing bacteria in oxygen-free broth, followed by resuspending a single colony from a blood agar plate. After incubation and dilution, the culture is stained with membrane-permeable and...
10:58
Assessment of GFP Expression and Viability Using the Tali Image-Based Cytometer
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Cited by 14 •
2011
This protocol describes how to perform cell viability and fluorescence expression assays using the Tali Image-Based Cytometer.
FAQs
These indicators capture different aspects of cell condition. Metabolic assays detect whether viable cells convert substrates into measurable signals, whereas membrane-integrity assays examine whether damaged cells exclude or retain particular dyes. Because the two measurements reflect different cellular properties, combining them can provide a more informative assessment than relying on one indicator alone.
An assay signal may reflect altered metabolic activity rather than an immediate loss of living cells. Cellular viability analysis should therefore be interpreted alongside membrane integrity and cell proliferation measurements. This distinction helps researchers determine whether a material, culture condition, or treatment is causing cytotoxicity or instead changing how quickly cells grow or process assay substrates.
Viability concerns whether cells remain living and functionally active, while proliferation concerns changes in cell growth over time. A population may retain viable cells without expanding rapidly, or show altered growth that does not necessarily indicate cell death. Separating these outcomes is important when evaluating scaffolds, culture conditions, and engineered tissues.
The response of cells to a biomaterial can indicate whether the material supports biological performance or produces harmful effects. Measuring viability helps compare scaffold designs and culture conditions, while interpretation with proliferation and membrane-integrity information clarifies the nature of the response. These results guide refinement of materials intended to maintain cells in engineered systems.
Researchers examine viability indicators after exposing cells to a biomaterial, culture condition, engineered tissue environment, or therapeutic candidate. Measurements may include metabolic activity, membrane integrity, and cell proliferation. Comparing these outcomes helps determine whether the tested system is compatible with cells and whether reduced performance reflects cytotoxic effects or a change in growth.
Viability analysis provides evidence about whether scaffolds and bioreactors can maintain cells over time. Researchers can use measurements of metabolic activity, membrane integrity, and proliferation to identify conditions associated with better biological performance. The findings support optimization of engineered environments before applying them to broader tissue-engineering or bioengineering studies.
The analysis is useful whenever researchers need to determine whether cells remain supported within an engineered tissue or after exposure to a therapeutic candidate. Viability-related measurements can reveal impaired cellular performance and help distinguish cytotoxic effects from altered growth. This information contributes to decisions about biological compatibility and the suitability of a system for further investigation.