Clonal Density
Clonal Density - Related Videos
10:32
Enumeration of Neural Stem Cells Using Clonal Assays
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Cited by 5 •
2016
Neural stem cells (NSCs) refer to cells which can self-renew and differentiate into the three neural lineages. Here, we describe a protocol to determine NSC frequency in a given cell population using neurosphere formation and differentiation under clonal conditions.
12:06
Isolation of CD133+ Liver Stem Cells for Clonal Expansion
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Cited by 22 •
2011
Here we describe the isolation of CD133 expressing liver stem cells and cancer stem cells from whole murine liver, a process that requires tissue digestion, cell enrichment, and flow cytometry isolation. We include methods for advanced single cell isolation and clonal expansion.
17:08
In vivo Clonal Tracking of Hematopoietic Stem and Progenitor Cells Marked by Five Fluorescent Proteins using Confocal and Multiphoton Microscopy
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Cited by 11 •
2014
Combinatorial 5 fluorescent proteins marking of hematopoietic stem and progenitor cells allows in vivo clonal tracking via confocal and two-photon microscopy, providing insights into bone marrow hematopoietic architecture during regeneration. This method allows non-invasive fate mapping of spectrally-coded HSPCs-derived cells in intact tissues for extensive periods of time following transplantation.
06:40
Visualization of Chondrocyte Intercalation and Directional Proliferation via Zebrabow Clonal Cell Analysis in the Embryonic Meckel’s Cartilage
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Cited by 10 •
2015
Cell organization of craniofacial bones has long been hypothesized but never directly visualized. Multi-spectral cell labeling and in vivo live imaging allows visualization of dynamic cell behavior in zebrafish lower jaw. Here, we detail the protocol to manipulate Zebrabow transgenic fish and directly observe cell intercalation and morphological changes of chondrocytes in the Meckel’s cartilage.
08:42
Density Gradient Ultracentrifugation
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2023
Density gradient ultracentrifugation is a common technique used to isolate and purify biomolecules and cell structures. This technique exploits the fact that, in suspension, particles that are more dense than the solvent will sediment, while those that are less dense will float. A high-speed ultracentrifuge is used to accelerate this process in order to separate biomolecules within a density gradient, which can be established by layering liquids of decreasing density in a centrifuge tube. The...
FAQs
Cell-to-cell contact and secreted factors can influence whether individual cells survive, proliferate, and form colonies. Consequently, reducing the number of cells does not eliminate community effects; it changes their spatial distribution and intensity. Controlling clonal density helps researchers distinguish growth arising from individual cells or small colonies while still examining how local cellular interactions affect outgrowth.
Spatial distribution determines whether colonies remain sufficiently discrete to be distinguished from one another. If growth cannot be attributed to an individual cell or a small colony, researchers may have difficulty evaluating population uniformity or interpreting colony formation. Carefully controlled spacing therefore supports clearer assessment of genetically or phenotypically uniform populations and improves confidence in comparisons between cultures.
When cells are grown from individual cells or small, discrete colonies, differences in outgrowth become easier to associate with particular starting populations. This arrangement can expose variation in survival, proliferation, or colony formation that might be obscured in densely mixed cultures. Researchers can therefore use clonal-density conditions to evaluate heterogeneity while selecting populations for further study or expansion.
A basic workflow begins by plating cells at a controlled density that allows individual cells or small colonies to remain distinguishable. Researchers then monitor survival, proliferation, and colony formation, assessing whether the resulting outgrowth can be linked to discrete starting units. The selected populations can subsequently support cell-line generation, expansion studies, or downstream evaluation of cellular characteristics.
Bioengineers use clonal-density cultures when they need to generate cell lines, evaluate cellular heterogeneity, or optimize conditions for cell expansion. The approach is also useful for studying how the surrounding microenvironment affects growth, because controlled seeding makes colony formation easier to compare across conditions. These applications connect population isolation with practical goals in reproducible cell production.
Controlled seeding density helps researchers know whether observed growth reflects individual-cell or small-colony behavior rather than an indistinguishable mass of cells. It also supports more reproducible cell production by standardizing the starting arrangement. As a result, downstream measurements can be interpreted with greater clarity, particularly when comparing expansion conditions or evaluating populations intended to be genetically or phenotypically uniform.