Humane Endpoints
Humane Endpoints - Related Videos
01:19
Precipitation Titration: Endpoint Detection Methods
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2025
In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3. In the Volhard method, a standard excess of AgNO3 is first added to the...
07:05
Important Endpoints and Proliferative Markers to Assess Small Intestinal Injury and Adaptation using a Mouse Model of Chemotherapy-Induced Mucositis
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Cited by 9 •
2019
Here, we present a protocol to establish important endpoints and proliferative markers of small intestinal injury and compensatory hyperproliferation using a model of chemotherapy-induced mucositis. We demonstrate the detection of proliferating cells using a cell cycle specific marker and using small intestinal weight, crypt depth, and villus height as endpoints.
01:34
Humane Euthanasia and Confirmation of Death in Rodents
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2026
All animal procedures described here must be conducted in accordance with institutional animal ethics guidelines and approved by IACUC. All procedures must follow the principles of the 3Rs—Replacement, Reduction, and Refinement—and must be performed by trained personnel. Humane endpoints in rodents are predefined clinical, behavioral, or physiological indicators that signal an animal is experiencing significant pain, distress, or declining health. When these signs are observed, timely...
10:18
Three-dimensional Quantification of Dendritic Spines from Pyramidal Neurons Derived from Human Induced Pluripotent Stem Cells
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Cited by 7 •
2015
Dendritic spines of pyramidal neurons are the sites of most excitatory synapses in mammalian brain cortex. This method describes a 3D quantitative analysis of spine morphologies in human cortical pyramidal glutamatergic neurons derived from induced pluripotent stem cells.
07:34
Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
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Cited by 25 •
2013
Investigation of the Uncanny Valley Hypothesis and affective experience requires an understanding of the hypothesis' dimension of human likeness (DHL). This protocol allows representation of the DHL and examination of categorical perception. Use of the same stimuli and fMRI to distinguish brain regions responsive to physical and category change is illustrated.
FAQs
Humane endpoints integrate animal-welfare safeguards into the experimental plan before deterioration becomes severe. By specifying observable criteria and corresponding actions in advance, researchers can balance the scientific objective against ethical obligations rather than making inconsistent decisions during a study. This planning also promotes more consistent handling of animals that show comparable changes in condition.
Useful observations include changes in behavior, body condition, mobility, feeding, and overall clinical status. Considering several domains helps personnel recognize deterioration through observable changes rather than relying on a single sign. These indicators provide the basis for deciding whether an animal has reached the threshold for intervention, supporting earlier and more consistent welfare decisions.
A threshold converts monitoring observations into a planned decision point. Once an animal reaches the specified level of change, personnel can act instead of continuing observation without a clear response. This approach helps limit avoidable pain, distress, or suffering while making interventions more consistent across animals and reducing uncertainty during the research process.
A practical plan should link observed changes in behavior, body condition, mobility, feeding, or clinical status to a predetermined response. The response may involve supportive care, removal from the study, or euthanasia, depending on the specified threshold and study context. Clear links between observations and actions help trained personnel identify deterioration early and respond consistently.
When monitoring shows that an animal has reached a predefined intervention threshold, the established plan may call for supportive care, removal from the study, or euthanasia. Selecting among these responses allows researchers to address deterioration without waiting for suffering to become unnecessary or prolonged. It also clarifies what personnel should do when an animal reaches the specified decision point.
They align experimental decisions with animal-welfare obligations while preserving attention to the study’s scientific purpose. Consistent criteria can reduce variation in decisions about deteriorating animals, and early recognition can reduce avoidable suffering. In this way, humane endpoints support responsible study design, clearer monitoring practices, and more consistent responses across a biological research project.