Rare-lacz Reporter Cells
Rare-lacz Reporter Cells - Related Videos
09:49
Quantitative Measurement of Relative Retinoic Acid Levels in E8.5 Embryos and Neurosphere Cultures Using the F9 RARE-Lacz Cell-based Reporter Assay
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Cited by 6 •
2016
Methods to accurately measure retinoic acid (RA) levels in small amounts of tissue do not exist. This protocol describes the easy, quantitative measurement of relative RA levels in E8.5 embryos and neurospheres using an RA reporter cell line.
02:15
Employing Reporter Cells in a Co-Culture to Study Retinoic Acid Production by Mouse Embryonic Cells
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2025
This video demonstrates a technique for assessing retinoic acid activity in mouse embryos. Upon isolating cells from the mouse embryos, the cells are co-cultured with retinoic acid (RA) reporter cells. Embryonic cells produce RA, which induces beta-galactosidase expression in reporter cells, indicating RA activity in the embryonic cells.
03:56
Measuring Retinoic Acid Levels in Neurospheres Using a Retinoic Acid Reporter Cell Line
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2025
This video demonstrates the measurement of retinoic acid (RA) secretion from neurosphere cells using RA reporter cells. It outlines the steps involved in co-culturing neurosphere cells with RA reporter cells and performing a colorimetric RA assay to measure RA levels.
11:14
Isolating LacZ-expressing Cells from Mouse Inner Ear Tissues using Flow Cytometry
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Cited by 7 •
2011
Flow cytometry is a powerful tool allowing for the isolation and study of specific cell populations. This protocol describes steps for isolating LacZ-expressing cells from cochlear tissues from neonatal transgenic mice. Dissociated cochlear cells were labeled using fluorescent-conjugated substrates of β-galactosidase prior to separation via flow cytometry.
08:28
Targeted Metabolomics on Rare Primary Cells
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2024
Here, we present a protocol to accurately and reliably measure metabolites in rare cell types. Technical improvements, including a modified sheath fluid for cell sorting and the generation of relevant blank samples, enable a comprehensive quantification of metabolites with an input of only 5000 cells per sample.
FAQs
The reporter converts infrequent gene expression into a discrete visual mark that can be examined cell by cell. After β-galactosidase acts on X-gal, labeled cells produce a blue product, making rare events easier to distinguish from surrounding unlabeled tissue. This is especially valuable when the relevant neuronal population is too small to characterize reliably through broad cellular labeling.
β-galactosidase provides the enzymatic activity that links reporter expression to a visible histochemical signal, while X-gal supplies the substrate that becomes blue after conversion. The resulting signal preserves information about which cells expressed the reporter and where they are located. Researchers can therefore examine molecular activity together with tissue position through microscopy.
These cells help relate gene regulation to cellular location and potential functional organization. A sparse pattern can show where particular molecular activity occurs during neuronal development, within a lineage, or across a circuit. The same spatial information can also reveal how disease-related changes affect selected cells rather than producing only a generalized tissue-wide signal.
Researchers examine tissue containing the reporter and apply a histochemical approach using a β-galactosidase substrate such as X-gal. Cells that generate the enzymatic reaction develop a visible blue product, which can then be distinguished by microscopic analysis. This workflow converts otherwise difficult-to-see reporter activity into a spatially localized cellular readout.
The approach is most useful when the biological event or cell population is infrequent. Sparse labeling can separate a small number of relevant cells from the much larger surrounding population, supporting focused analysis of neuronal development, lineage, circuit organization, or disease-related changes. It is therefore suited to questions where rarity itself is an important part of the result.
The distribution of blue cells can indicate which locations contain reporter-positive cells and how sparsely those cells are represented. Comparing such patterns across developmental, circuit-related, or disease contexts can help identify changes in selected cellular populations. Microscopic localization also allows researchers to relate the reporter signal to tissue organization while studying the underlying gene-regulatory activity.