Culture Supernatant Analysis
Culture Supernatant Analysis - Related Videos
06:07
Evaluating Cell Death Using Cell-Free Supernatant of Probiotics in Three-Dimensional Spheroid Cultures of Colorectal Cancer Cells
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Cited by 15 •
2020
Here methods are presented to understand anti-cancer effects of Lactobacillus cell-free supernatant (LCFS). Colorectal cancer cell lines show cell deaths when treated with LCFS in 3D cultures. The process of generating spheroids can be optimized depending on the scaffold and the analysis methods presented are useful for evaluating the involved signaling pathways.
01:49
An Assay To Evaluate the Anticancer Effects of Lactobacillus Cell-Free Supernatant
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2025
This video demonstrates an in vitro assay to study the anticancer effects of Lactobacillus cell-free supernatant (LCFS). Upon exposing colorectal cancer spheroids to varying doses of LCFS, the interaction with the bacterial metabolites in LCFS induces apoptosis in the cancer cells, disrupting the spheroid structure and leading to cell death in a dose-dependent manner.
15:04
A Neuronal and Astrocyte Co-Culture Assay for High Content Analysis of Neurotoxicity
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Cited by 46 •
2009
This article describes a novel protocol and reagent set designed for sensitive measurement of neurotoxic effects of compounds and treatments on co-cultures of neurons and astrocytes using high content analysis. Results demonstrate that high content analysis represents an exciting novel technology for neurotoxicity assessment.
08:36
Measuring Dengue Virus RNA in the Culture Supernatant of Infected Cells by Real-time Quantitative Polymerase Chain Reaction
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Cited by 7 •
2018
Real-time quantitative polymerase chain reaction analysis combined with reverse transcription (RT-qPCR) has been widely used to measure the level of RNA virus infections. Here we present a direct RT-qPCR assay, which does not require an RNA purification step, developed for the quantification of several RNA viruses, including dengue virus.
03:40
Heparin Affinity Chromatography-Based Baculovirus Purification: A Technique to Isolate Baculovirus From Insect Cell Supernatant
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2025
In this video, we demonstrate the technique to isolate baculovirus from an insect cell supernatant using heparin affinity chromatography. The isolation is facilitated by the affinity between the heparin in the column to the baculovirus envelope glycoprotein.
FAQs
Cytokine measurements provide a readout of signaling released by activated immune cells into their culture environment. When levels differ between experimental conditions, the pattern can indicate whether cells have changed their activation or inflammatory signaling. This makes cytokine profiles useful for connecting an experimental stimulus with an immune response, rather than relying only on cellular observations.
Separating cells and debris helps ensure that measurements primarily represent substances in the surrounding fluid rather than material associated with cells or debris. Centrifugation or filtration can be used for this separation, and the resulting sample can then be tested for cytokines, antibodies, metabolites, or microbial products. This step supports clearer comparison among culture conditions.
Comparing profiles can reveal how experimental conditions alter immune signaling, microbial activity, or interactions between host and pathogen. A condition associated with different cytokines, antibodies, metabolites, or microbial products may therefore provide evidence of a changed biological response. The comparison is especially informative when measurements are interpreted across multiple conditions rather than viewed as an isolated value.
The workflow begins with culturing cells or microorganisms, followed by collecting the fluid and separating it from cells and debris through centrifugation or filtration. The prepared supernatant is then evaluated with an assay, such as ELISA, a multiplex immunoassay, or a biochemical test. This sequence links the culture condition to measurable released substances.
ELISA, multiplex immunoassays, and biochemical tests are named analytical options for these samples. Together, they support measurement of cytokines, antibodies, metabolites, and microbial products released during culture. Using these readouts allows investigators to examine both immune-related signals and infection-associated products, depending on the experimental question and the substances present in the supernatant.
In infection studies, measurements from the supernatant can connect pathogen behavior with host responses. They may indicate immune-cell activation, inflammatory signaling, host-pathogen interactions, or pathogen growth and secretion. These readouts help characterize how infection-related processes change under different experimental conditions and provide a shared basis for examining both microbial products and immune responses.
Treatment evaluation can use comparisons of supernatant profiles across treated and untreated experimental conditions. Changes in cytokines, antibodies, metabolites, or microbial products may show that an intervention altered immune signaling, inflammation, or pathogen-related activity. The same comparative measurements can also help identify candidate biomarkers, defined here as measurable features associated with the biological state under study.