Fluorescein Delivery
Fluorescein Delivery - Related Videos
07:35
Lineage Labeling of Zebrafish Cells with Laser Uncagable Fluorescein Dextran
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Cited by 8 •
2011
This protocol delineates a way to label and trace the fate of small groups of cells zebrafish embryos using UV-uncaging of caged fluorescein, followed by whole mount immunolabeling to amplify the signal from the uncaged fluorescein.
02:01
Fluorescein Staining in an Autoimmune Dry Eye Rat Model to Examine Corneal Damage
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2025
This video demonstrates the staining of the damaged cornea using fluorescein dye to evaluate the extent of autoimmune dry eye disease in a rat model. The green fluorescence spots of the stained collagen fibers indicate corneal epithelial damaged cells.
05:32
Using Vertically Aligned Carbon Nanofiber Arrays on Rigid or Flexible Substrates for Delivery of Biomolecules and Dyes to Plants
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Cited by 1 •
2023
Here we describe methods for microfabricating vertically aligned carbon nanofibers (VACNFs), transferring VACNFs to flexible substrates, and applying VACNFs on both rigid and flexible substrates to plants for biomolecule and dye delivery.
11:54
Identification and Isolation of Slow-Dividing Cells in Human Glioblastoma Using Carboxy Fluorescein Succinimidyl Ester (CFSE)
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Cited by 16 •
2012
This video protocol demonstrates the application of the fluorescent dye carboxyfluorescein succinimidyl ester (CFSE) for the identification and separation of different sub-populations of cells in human glioblastoma based on frequency of cell division.
08:53
Assessment of Neuronal Viability Using Fluorescein Diacetate-Propidium Iodide Double Staining in Cerebellar Granule Neuron Culture
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Cited by 29 •
2017
This protocol describes how to accurately measure neuronal viability using Fluorescein diacetate (FDA) and Propidium Iodide (PI) double staining in cultured cerebellar granule neurons, a primary neuronal culture used as an in vitro model in neuroscience and neuropharmacology research.
FAQs
Fluorescence provides a readout of both location and movement. After fluorescein or a fluorescein-labeled molecule is introduced, excitation generates a green signal that can be detected optically. Mapping that signal over space and time helps indicate where the material accumulates or travels, while changes in intensity or pattern may indicate redistribution or release rather than simple delivery failure.
Chemical conjugation, encapsulation, and microinjection place the fluorescent cargo into different controlled delivery arrangements. Conjugation links fluorescein to a molecule, encapsulation packages it within a carrier, and microinjection introduces material directly into a selected compartment. Comparing these approaches helps bioengineers examine how the delivery format affects localization, transport, and release in cells, tissues, or engineered systems.
A stronger or weaker signal does not by itself identify a single cause. Fluorescence may change because the material has been redistributed, released, or delivered with different efficiency. For that reason, interpretation should consider both the measured amount of signal and its spatial or temporal pattern, which together distinguish delivery performance from transport behavior.
A basic evaluation begins by selecting fluorescein or a fluorescein-labeled molecule and a delivery format such as conjugation, encapsulation, or microinjection. The material is then introduced into cells, tissues, or an engineered biological system, followed by optical detection after excitation. Quantifying the resulting signal provides estimates of delivery efficiency and maps distribution or release over space and time.
Fluorescein delivery supports several bioengineering investigations, including membrane permeability, intracellular trafficking, drug-carrier performance, and tissue transport. In each case, fluorescence measurements can show whether material reaches a relevant location and how its distribution changes. This makes the approach useful for comparing transport behavior with the performance of engineered carriers or other biological delivery systems.
Measurements from fluorescein delivery can inform the design of responsive biomaterials, targeted therapeutics, and diagnostic platforms. Spatial patterns can show where a material localizes, while temporal changes can indicate how distribution or release evolves. These outcomes connect an engineered system's delivery behavior to its intended function, helping researchers assess whether a platform directs material to the desired biological context.