Neutrophil Viability Assessment
Neutrophil Viability Assessment - Related Videos
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...
11:20
Quantitative Assessment of Human Neutrophil Migration Across a Cultured Bladder Epithelium
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Cited by 8 •
2013
We developed an in vitro model that mimics an important component of the acute inflammatory response during infection of the bladder with uropathogenic Escherichia coli. The transuroepithelial neutrophil migration assay enables quantitative assessment of human neutrophil migration across bladder epithelia, cultured on permeable supports, in response to bacterial infection or chemoattractant substances.
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.
03:20
XTT Assay: A Colorimetric Assay to Assess Cell Viability and Mitochondrial Activity
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2023
This article describes the protocol for XTT assay which is a colorimetric assay to assess cell viability and mitochondrial activity.
04:38
Assessing Neuronal Viability in a Cerebellar Neuron Culture via Double Staining
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2025
This video demonstrates the method of identifying neurons from a mixed culture of cerebellar granule neurons and glial cells using dual staining with fluorescein diacetate (FDA) and propidium iodide (PI), where live neurons appear green and dead neurons appear red.
FAQs
Dye exclusion tests whether the plasma membrane remains sufficiently intact to prevent entry of the assay dye. Neutrophils that lose membrane integrity become dye-positive, providing evidence of cellular damage rather than preserved viability. This readout is especially useful for identifying injury associated with sample handling, culture conditions, or experimental treatments.
These measurements examine different cellular changes associated with apoptosis. Altered membrane asymmetry, reduced mitochondrial activity, and changes in nuclear morphology can indicate programmed cell death even when plasma membrane integrity has not yet been lost. Using these readouts helps researchers distinguish early apoptotic changes from more advanced membrane disruption.
Neutrophils can be affected by the conditions used to isolate, culture, or activate them, so reduced viability may reflect the experimental procedure rather than the treatment being studied. Assessing cellular status in relation to these conditions helps separate treatment-associated effects from damage introduced before or during the experiment.
A single readout may capture only one aspect of cellular injury. Plasma membrane integrity indicates whether the cell boundary remains intact, whereas apoptosis-related measurements identify changes in membrane asymmetry, mitochondrial activity, or nuclear morphology. Comparing these outcomes provides a more informative picture of whether cells remain intact, are undergoing apoptosis, or show broader treatment-associated damage.
Begin with isolated neutrophils, then evaluate their status under the intended handling, culture, activation, or treatment conditions. Select a readout that matches the question, such as dye exclusion for membrane integrity or apoptosis-related measurements for cellular changes. Interpret the result alongside the experimental condition so viability findings can qualify conclusions about neutrophil responses.
The choice depends on which cellular feature requires evaluation. Dye exclusion is suited to determining whether plasma membrane integrity has been preserved, while measurements of membrane asymmetry, mitochondrial activity, or nuclear morphology address apoptosis-related changes. When treatment effects may involve more than one type of injury, combining complementary readouts can strengthen interpretation.
It is important whenever researchers need to determine whether observed neutrophil behavior reflects a biological response or loss of cellular integrity. In studies of host defense, inflammatory disorders, and antimicrobial responses, viability measurements help place functional findings in context and prevent damaged cells from being mistaken for normally responding neutrophils.
Viability data help identify whether a candidate treatment alters neutrophils directly or causes cellular damage under the tested conditions. This information is relevant to drug safety studies and to experiments examining inflammatory or antimicrobial responses. Linking treatment outcomes with membrane integrity and apoptosis-related findings supports more careful interpretation of beneficial, neutral, or harmful cellular effects.