In Vivo Assay
In Vivo Assay - Related Videos
07:03
An in vivo Assay to Test Blood Vessel Permeability
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Cited by 335 •
2013
We are presenting an in vivo assay to test blood vessel permeability. This assay is based on intravenous injection of a dye and subsequent visualization of its diffusion into interstitial spaces.
09:34
In Vivo Canine Muscle Function Assay
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Cited by 19 •
2011
We describe a minimally-invasive and painless method to measure canine hindlimb muscle strength and muscle response to repeated eccentric contractions.
11:49
Trans-vivo Delayed Type Hypersensitivity Assay for Antigen Specific Regulation
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Cited by 19 •
2013
We describe a valuable diagnostic assay that could potentially be used to decide the withdrawal of immunosuppression after transplant without elevated risk of graft rejection. The assay uses the principles of Delayed Type Hypersensitivity and provides accurate assessment of both donor specific effector and regulatory immune responses mounted by recipients.
06:15
Assessing the Metabolic Activity of Whole Regenerating Zebrafish Ventricles Ex Vivo Using an Extracellular Flux Assay
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2026
In this article, we describe a detailed protocol for quantifying the oxygen consumption rate and extracellular acidification rate of ex vivo adult zebrafish ventricles to characterize their oxidative and glycolytic metabolic capacity.
09:49
Antigen Specific In Vivo Killing Assay using CFSE Labeled Target Cells
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Cited by 39 •
2010
Many infections elicit a strong CTL response, but occasionally, the quantity of responding cells does not correlate to control of the pathogen1. One measure of CTL quality is their ability to kill specifically2. CFSE labeling of target cells can be used to investigate this CTL response quality in vivo3,4.
FAQs
The measured response reflects coordinated activity across organs, tissues, and regulatory pathways rather than an isolated biological reaction. These interactions can modify how a substance or treatment produces physiological, biochemical, behavioral, or disease-related effects. Consequently, the result can reveal system-level activity that would not be evident from examining a single cellular or biochemical component alone.
Controls provide the reference needed to interpret changes observed after administering the test material. Comparing treated subjects with appropriate controls helps distinguish treatment-associated effects from responses that do not result from the experimental intervention. This comparison strengthens conclusions about efficacy, toxicity, pharmacological activity, or biological function within the tested organism.
Endpoints are selected according to the biological effect being investigated and may include physiological, biochemical, behavioral, or disease-related responses. A defined endpoint gives the assay a measurable outcome for comparing experimental groups and determining whether the test material produces a meaningful response. Matching the endpoint to the research question supports clearer interpretation of whole-organism effects.
Cell-based and biochemical methods examine more limited components of biology, whereas an in vivo assay shows how effects emerge within an intact organism. It adds information about interactions among organs, tissues, and regulatory pathways. Used together, these approaches can connect activity observed in simpler systems with efficacy, toxicity, pharmacological activity, or biological function in the whole organism.
A general workflow includes administering the test material under controlled conditions, defining the response to be measured, assessing the selected endpoint, and comparing treated subjects with appropriate controls. The exact measurements depend on whether the study examines physiological, biochemical, behavioral, or disease-related effects. This structure links the intervention to an interpretable biological outcome.
Researchers choose this approach when they need evidence about how a substance, treatment, or biological process operates within an integrated living system. It can support investigations of efficacy, toxicity, pharmacological activity, and biological function. The method is especially relevant when interactions among organs, tissues, and regulatory pathways are central to the research question.