Supernatant Analysis
Supernatant Analysis - Related Videos
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.
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.
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.
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.
03:46
Qualitative Analysis
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2020
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions. For instance, group IV...
FAQs
The measured molecules provide a soluble readout of activity occurring in or around the cells. Cytokines and chemokines can indicate inflammatory signaling, whereas antibodies, microbial products, or nucleic acids provide different evidence about immune responses or pathogen-associated activity. This makes the liquid fraction useful for relating cellular behavior to measurable molecular signals.
Each analyte class addresses a different aspect of the sample. Cytokines and chemokines help characterize signaling associated with immune-cell activation and inflammation. Antibodies reflect an immune response, while microbial products and nucleic acids can indicate pathogen-associated activity. Selecting among these measurements allows investigators to align the assay with the biological question being studied.
The soluble fraction can capture signals produced during communication between host cells and infectious agents. Measuring immune mediators alongside microbial products or nucleic acids helps characterize both inflammatory responses and pathogen-related activity in the same research context. This supports analysis of how host responses and infection-associated signals relate to one another.
Cells are first cultured or otherwise processed, after which the material is separated so that the liquid fraction lies above the pellet. Centrifugation can provide this separation by collecting cells, particles, or precipitated material in the pellet. The recovered supernatant is then subjected to analytical assays selected for the molecules of interest.
Available targets include cytokines, chemokines, antibodies, microbial products, and nucleic acids. These measurements can be used to characterize immune-cell activation, inflammatory signaling, pathogen growth, or host-pathogen interactions. The target selected determines which aspect of biological activity the analysis emphasizes and what type of soluble biomarker information the sample can provide.
Applications include infection diagnosis, evaluation of immune responses, monitoring therapeutic effects, and identifying soluble biomarkers. In research settings, the approach also supports investigation of pathogen growth and host-pathogen interactions. Its value comes from connecting measurable substances in the liquid fraction with disease-related activity, treatment-associated changes, or immune behavior.