Mechanical Isolation
Mechanical Isolation - Related Videos
08:42
Myo-mechanical Analysis of Isolated Skeletal Muscle
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Cited by 25 •
2011
To assess the in vivo effects of therapeutic interventions for muscle disease, methods are needed to quantitate force generation and fatigability in treated muscle. We detail an approach to evaluating myo-mechanical properties in explanted mouse hindlimb muscle. This analysis provides a robust approach to quantitating the effects of genetic modification on muscle function, as well as comparison of therapies in mouse models of muscle disease.
06:56
Isolation of Macrophages from Mouse Dorsal Root Ganglion Using Mechanical Dissociation
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2025
This video demonstrates an enzyme-free protocol to isolate macrophages from mouse dorsal root ganglion (DRG) using a mechanical dissociation technique. Upon homogenization of the freshly collected DRG tissue, antibodies against the cell-surface receptors on the macrophages are used to label the cells fluorescently, followed by performing flow cytometry to confirm the presence of macrophages in the sample.
12:45
Mechanical Stimulation of Chondrocyte-agarose Hydrogels
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Cited by 29 •
2012
The biosynthesis of cartilaginous extracellular matrix by chondrocytes can be affected by application of mechanical stimuli. This method describes the technique of applying dynamic compressive strains to chondrocytes encapsulated in 3D constructs and the evaluation of induced changes in chondrocyte metabolism.
03:27
Isolation of Multiple Cell Types from a Mouse Brain by Mechanical Homogenization
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2025
This video demonstrates the isolation of multiple types of cells from mouse brain tissue. Tissue is first mechanically sheared using a tissue grinder in a salt solution to maintain an osmotic balance. The tissue homogenate is then subjected to density gradient centrifugation to remove cellular debris. Cells are then resuspended in a solution for further analysis.
14:44
Isolation of mRNAs Associated with Yeast Mitochondria to Study Mechanisms of Localized Translation
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Cited by 6 •
2014
Many mRNAs encoding mitochondrial proteins are associated with the mitochondria outer membrane. We describe a subcellular fractionation procedure aimed at isolation of yeast mitochondria with its associated mRNAs and ribosomes. This protocol can be applied to cells grown under diverse conditions in order to reveal mechanisms of mRNA localization and localized translation near the mitochondria.
FAQs
The central trade-off is between sufficient force for release and excessive force that damages cells or structures. Cutting, grinding, or pipetting must disrupt the tissue enough to produce a usable preparation while limiting physical stress. A gentler treatment may preserve morphology and function, whereas stronger treatment can increase recovery but alter the properties researchers intend to examine.
These characteristics determine how released components can be separated after tissue disruption. Filtration primarily distinguishes structures by size, while centrifugation separates material according to density. Location within the original tissue can also guide which regions are collected. Matching the physical separation step to the desired component improves sample enrichment and supports more focused downstream analysis.
Mechanical isolation relies on physical actions rather than chemical or enzymatic treatment, so it can reduce exposure to reagents that might affect biological features. This advantage does not eliminate risk: physical stress may still injure cells or modify structures. The choice therefore depends on whether preserving particular features or achieving effective tissue disruption is the greater priority.
Preservation depends mainly on how force is applied and how much disruption the sample receives. Cutting, grinding, and pipetting can produce different levels of physical stress, while filtration or centrifugation adds further handling. Researchers must balance release and separation against possible damage, because the resulting sample may be suitable for microscopy but less appropriate for culture or other analyses.
A typical workflow begins by physically disrupting the tissue with actions such as cutting, grinding, or pipetting. The released material can then be passed through a filter or subjected to centrifugation to separate components by size or density. The collected fraction is subsequently prepared for microscopy, culture, molecular analysis, or another experiment.
This approach is useful when a study requires a cell suspension, an isolated tissue structure, or a sample for microscopy, culture, or molecular analysis without relying primarily on enzymatic treatment. It is especially relevant when reducing reagent exposure may help preserve selected biological features. The method remains valuable only when the applied force is compatible with the intended downstream use.