Outflow Medium Collection
Outflow Medium Collection - Related Videos
09:32
Collection of Serum- and Feeder-free Mouse Embryonic Stem Cell-conditioned Medium for a Cell-free Approach
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Cited by 2 •
2017
This protocol provides a method for the collection of mouse embryonic stem cell (mESC)-conditioned medium (mESC-CM) derived from serum (fetal bovine serum, FBS)- and feeder (mouse embryonic fibroblasts, MEFs)-free conditions for a cell-free approach. It may be applicable for the treatment of aging and aging-associated diseases.
12:32
Chromosome Screening of Human Preimplantation Embryos by Using Spent Culture Medium: Sample Collection and Chromosomal Ploidy Analysis
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Cited by 20 •
2021
The present study reports a protocol for chromosome screening of human embryos that uses spent culture medium, which avoids embryo biopsy and enables chromosome ploidy identification using NGS. The present article presents the detailed procedure, including the preparation of culture medium, whole genome amplification (WGA), next-generation sequencing (NGS) library preparation, and data analysis.
13:33
Maintaining Wolbachia in Cell-free Medium
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Cited by 6 •
2007
This video describes a method for purifying Wolbachia pipientis from an Anopheles gambiae cell line and then culturing the endosymbiont in cell-free medium. An assay for viability of the bacterium is demonstrated.
02:01
A Method for Generating Oligodendrocyte-Conditioned Medium
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2025
This video demonstrates the production of oligodendrocyte-conditioned medium (OCM) from oligodendrocyte lineage cells by stressing them to enhance their molecular release into the medium. This medium, which is rich in growth factors, cytokines, and other bioactive molecules, can be added to neuron cultures to gain insight into the impact of oligodendrocytes-secreted factors on neuronal physiology and connectivity.
07:18
Bone Conditioned Medium: Preparation and Bioassay
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Cited by 13 •
2015
We describe here how to prepare bone-conditioned medium (BCM) and test its activity in vitro.
FAQs
Interpretation depends on separating material released by the culture or experimental system from contamination introduced during collection. The outlet provides a defined point for recovering liquid, while controlled, contamination-limited handling helps preserve the molecular information present in that outflow. This matters because measurements of extracellular DNA, RNA, proteins, or metabolites should reflect the source system rather than collection artifacts.
Collecting outflow at different time points allows researchers to compare molecular signals released as the system changes. Because the approach can sample material leaving the system without directly disrupting its source, it can complement endpoint tissue measurements. In genetics, this supports monitoring changes in extracellular DNA or RNA and relating those patterns to evolving cellular responses.
Direct tissue sampling examines material within the source, whereas outflow analysis focuses on molecules released into the surrounding medium. The two approaches therefore provide complementary information rather than identical measurements. Outflow samples can support less disruptive monitoring of extracellular DNA and RNA, while tissue sampling can provide direct information from the biological material being sampled.
Collected liquid may contain nucleic acids, including extracellular DNA or RNA, as well as proteins, metabolites, and other cell-derived materials. Researchers process the sample according to the type of information they want to examine. Nucleic-acid processing supports genetic profiling, while analysis of proteins or metabolites can broaden interpretation of cellular signals released by the system.
A typical workflow directs liquid through an outlet, recovers the departing medium under controlled conditions, and limits contamination during handling. The collected material is then processed for the selected molecular target, such as nucleic acids, proteins, or metabolites. Researchers can subsequently analyze the processed sample to characterize released signals or compare them across collection periods.
Researchers may choose this approach when they want genetic information from material released into the medium rather than relying only on disrupted tissue. It is particularly relevant for studies of extracellular DNA or RNA, genetic profiling, biomarker investigations, and monitoring cellular responses over time. The method can therefore add a sampling stream that complements direct source-material analysis.
The measured signal determines which aspect of the system is being assessed. Extracellular DNA or RNA can contribute to genetic profiling and biomarker studies, whereas proteins and metabolites provide additional information about released cellular material. Considering these categories separately helps researchers connect the collected sample to a specific molecular question instead of treating all outflow components as equivalent.