Hypotonic Isolation
Hypotonic Isolation - Related Videos
10:46
Retinal Cryo-sections, Whole-Mounts, and Hypotonic Isolated Vasculature Preparations for Immunohistochemical Visualization of Microvascular Pericytes
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Cited by 2 •
2018
We demonstrate three different tissue preparation techniques for immunohistochemical visualization of rat retinal microvascular pericytes, i.e., cryo-sections, whole-mounts, and hypotonic isolation of the vascular network.
14:20
Measuring the Osmotic Water Permeability Coefficient (Pf) of Spherical Cells: Isolated Plant Protoplasts as an Example
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Cited by 20 •
2014
Measuring the osmotic water permeability coefficient (Pf) of cells can help understand the regulatory mechanisms of aquaporins (AQPs). Pf determination in spherical plant cell protoplasts presented here involves protoplasts isolation and numerical analysis of their initial rate of volume change as a result of an osmotic challenge during constant bath perfusion.
05:29
Axoplasm Isolation from Rat Sciatic Nerve
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Cited by 6 •
2010
We demonstrate a protocol for axoplasm isolation from adult rat sciatic nerve based on dissection of nerve fascicles and incubation in hypotonic medium to release myelin and lyse non-axonal structures, followed by extraction of the remaining axon-enriched material.
10:03
Isolation of CA1 Nuclear Enriched Fractions from Hippocampal Slices to Study Activity-dependent Nuclear Import of Synapto-nuclear Messenger Proteins
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Cited by 8 •
2014
We provide a detailed protocol for induction of long-term potentiation in the CA1 region of the hippocampus and the subsequent isolation of nuclear enriched fractions from the tetanized area of the slice. This approach can be used to determine activity dependent nuclear protein import in cellular models of learning and memory.
10:33
Isolation and Ex Vivo Culture of Vδ1+CD4+γδ T Cells, an Extrathymic αβT-cell Progenitor
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2015
Here, we provide an optimized protocol for the isolation and cloning of the scarce T-cell entity of peripheral Vδ1+CD4+ T cells that is, as we showed recently, an extrathymic αβ T-cell progenitor. This technique allows to quantitatively isolate, clone and efficiently expand these cells in ex vivo culture.
FAQs
The osmotic gradient drives water into cells, increasing their volume and placing stress on the plasma membrane. As swelling progresses, the membrane becomes less able to retain cytoplasmic contents. This makes the extent of exposure important: controlled swelling can release selected material while leaving larger structures sufficiently intact for fraction preparation.
Solution composition, exposure time, temperature, and mechanical handling each influence how extensively cells swell and lyse. Changing these conditions can shift the result from useful release toward excessive disruption. Optimization therefore supports structural integrity, fraction purity, reproducibility across experiments, and preservation of the intended cellular structures.
A controlled hypotonic exposure can preferentially remove soluble cytoplasmic material while retaining larger structures such as nuclei. The outcome depends on limiting membrane disruption rather than maximizing lysis. This selectivity is useful when the next analysis requires an enriched structural fraction, because excessive swelling or handling could reduce integrity and introduce unwanted cellular material.
A basic workflow begins by exposing cells to a hypotonic solution under a selected combination of composition, temperature, and exposure time. Swelling and membrane weakening then release soluble cytoplasmic material. Controlled mechanical handling helps preserve desired larger structures, after which the preparation can support nuclear or organelle-enriched fraction analysis.
The key material is a hypotonic solution, while the critical handling variables are exposure duration, temperature, and mechanical treatment. These factors determine whether cells swell enough to release contents without disrupting structures needed for analysis. Careful control makes results more comparable between preparations and experiments.
In biology, Hypotonic Isolation supports preparation of nuclear or organelle-enriched fractions for microscopy, biochemical analysis, and molecular assays. Its value is not limited to obtaining material; the quality of the fraction affects how confidently researchers can interpret structural or molecular measurements. Therefore, condition optimization is part of experimental design.