简介：
Overview
This protocol presents a fluorescence assay to assess the functional integrity of intercellular tight junctions in hCMEC/D3 cell monolayers, a model of the human blood-brain barrier. The method allows for the calculation of apparent permeability in a shorter time frame compared to traditional kinetic assays.
Key Study Components
Area of Science
- Neuroscience
- Cell Biology
- Blood-Brain Barrier Research
Background
- Lucifer Yellow (LY) is a reliable marker for assessing paracellular permeability.
- hCMEC/D3 cells are used as an in vitro model for the human blood-brain barrier.
- Tight junctions are crucial for maintaining the integrity of the blood-brain barrier.
- This assay provides a cost-effective and efficient method for permeability studies.
Purpose of Study
- To demonstrate the use of LY as a marker for permeability assessment.
- To evaluate the kinetics of monolayer formation in hCMEC/D3 cells.
- To establish a protocol that simplifies the assessment of tight junction integrity.
Methods Used
- Cell plating in tissue culture inserts with microporous membranes.
- Application of collagen type one to support cell growth.
- Incubation of cell cultures in a controlled environment.
- Fluorescence assay to measure apparent permeability.
Main Results
- The fluorescence assay effectively demonstrates the integrity of tight junctions.
- Results indicate that LY is a robust marker for permeability studies.
- The protocol allows for quicker assessment compared to traditional methods.
- Functional integrity of tight junctions can be evaluated in transfected brain endothelial cells.
Conclusions
- The presented protocol is a valuable tool for studying blood-brain barrier permeability.
- LY serves as an effective marker for assessing tight junction functionality.
- This method can facilitate further research into drug delivery across the blood-brain barrier.
What is Lucifer Yellow?
Lucifer Yellow is a fluorescent dye used as a marker to assess cell permeability.
Why is the hCMEC/D3 cell line used?
The hCMEC/D3 cell line is a widely accepted in vitro model for studying the human blood-brain barrier.
How does this protocol compare to traditional methods?
This protocol allows for quicker assessments of permeability compared to longer kinetic assays.
What are tight junctions?
Tight junctions are structures that seal the space between adjacent cells, maintaining barrier function.
Can this method be used for other cell types?
Yes, it can also assess tight junction integrity in brain endothelial cells transfected with nanoparticles.
What is the significance of assessing blood-brain barrier permeability?
Understanding permeability is crucial for developing treatments that target the brain effectively.
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