Exogenous Supplementation
Exogenous Supplementation - Related Videos
05:42
Elevated Plus Maze Test Combined with Video Tracking Software to Investigate the Anxiolytic Effect of Exogenous Ketogenic Supplements
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Cited by 39 •
2019
Here, we present a protocol to investigate changes in the anxiety level of rodent animal models. The elevated plus maze (EPM) test, used together with a video tracking software, provides a reliable method to document the effect of various potential anxiolytic treatments in preclinical laboratory scenarios.
05:35
Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins
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Cited by 4 •
2016
Here we report protocols to detect endogenous and exogenous centromere-kinetochore proteins in human cells and quantify these protein levels at centromeres-kinetochores by indirect immunofluorescent staining through the use of fixation (paraformaldehyde, acetone, or methanol fixation).
05:30
Exogenous Mitochondrial Transfer in Differentiating Brown Adipocytes and AGPAT2-Deficient Preadipocytes
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2026
Exogenous mitochondria of human and murine origin can be internalized by differentiating preadipocytes and tracked throughout adipogenic differentiation using imaging and genetic tools. While these mitochondria physically interact with the endogenous mitochondrial network, they do not increase the expression of markers associated with mature brown adipocytes.
02:40
Inactivation of Bacteriophages Using Exogenous Lipopolysaccharide to Generate Phage-Free Salmonella Cultures
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2026
Source: Fernández-Fernández, R., et. al. Bacteriophage Removal from Infected Salmonella Cultures. J. Vis. Exp. (2024)This video demonstrates the use of exogenous LPS (Lipopolysaccharide) as a receptor mimic to inactivate lytic bacteriophages in Salmonella cultures. Through sequential incubation, centrifugation, and washing, phages are eliminated, resulting in a viable, phage-free bacterial suspension for downstream applications.
09:38
Dietary Supplementation of Polyunsaturated Fatty Acids in Caenorhabditis elegans
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Cited by 59 •
2013
Caenorhabditis elegans is a useful model to explore the functions of polyunsaturated fatty acids in development and physiology. This protocol describes an efficient method of supplementing the C. elegans diet with polyunsaturated fatty acids.
FAQs
The biological response depends not only on which substance is added, but also on how much is present, when it is introduced, and how it reaches the experimental system. These variables can alter signaling strength and duration during development. Controlling them helps researchers determine whether an observed change reflects the factor itself or its experimental exposure conditions.
Researchers compare supplemented and unsupplemented conditions to examine whether a developmental outcome changes when a factor is added. An effect can indicate that the factor is effective in that system, while comparisons across conditions help assess whether it is necessary or sufficient for a particular process. The interpretation also depends on the developmental window being tested.
Added nutrients, hormones, growth factors, or signaling molecules can influence cellular signaling and gene expression, which may alter differentiation and tissue formation. These effects connect an external experimental input with changes in cell behavior and developmental organization. Tracking such outcomes allows researchers to relate a supplemented condition to specific stages of cellular or tissue development.
Developmental studies may introduce defined nutrients, hormones, growth factors, or signaling molecules, depending on the biological question. Researchers can evaluate these substances in cell cultures, embryos, or organoid systems and then compare the resulting growth or differentiation with an unsupplemented condition. This supports targeted testing of factors linked to development rather than relying on undefined additions.
A basic workflow establishes a biological model, selects a defined substance, and specifies its concentration, timing, and delivery. Researchers then compare the supplemented system with an unsupplemented control and examine changes in signaling, gene expression, differentiation, growth, or tissue formation. This controlled comparison helps connect the added factor with a developmental outcome.
This approach is useful when researchers need to test how particular external factors affect embryonic patterning, stem cell differentiation, or tissue development in vitro. It also supports disease modeling and the study of organoid systems. By adjusting the supplementation conditions, investigators can examine developmental responses within defined experimental settings.
Introducing selected factors into cell cultures or organoid systems can influence signaling, gene expression, differentiation, and tissue formation. Researchers use these responses to investigate how developmental conditions shape tissue organization and to explore strategies for directing development in vitro. The approach is especially informative when outcomes are compared across defined supplemented and unsupplemented conditions.