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Luciferase: a sensitive and quantitative probe for blood-brain barrier disruption
S X Deng1, N Panahian, H James
1Department of Medicine, University of Rochester Medical Center, NY 14642, USA.
Journal of Neuroscience Methods
|October 9, 1998
Summary
Researchers developed a new method to measure blood-brain barrier (BBB) disruption using luciferase as a probe. This technique offers a sensitive way to assess BBB integrity in vivo.
Area of Science:
- Neuroscience
- Biochemistry
Background:
- The blood-brain barrier (BBB) protects the central nervous system but its disruption is implicated in various neurological disorders.
- Accurate methods for quantifying BBB permeability are crucial for understanding disease mechanisms and evaluating therapeutic interventions.
Purpose of the Study:
- To develop and validate a novel quantitative method for assessing blood-brain barrier (BBB) disruption.
- To evaluate the utility of luciferase as a sensitive probe for BBB integrity in a murine model.
Main Methods:
- Osmotic disruption of the BBB in mice using hypertonic mannitol.
- Intracarotid infusion of purified luciferase.
- Quantitative assessment of luciferase delivery to brain tissue via enzyme assay and immunohistochemical staining.
Main Results:
- Luciferase activity in the brain was significantly elevated (approximately sevenfold) in mannitol-treated mice compared to saline-treated controls.
- Quantitative immunohistochemistry confirmed an approximately eightfold increase in extravascular luciferase particles in the brains of mannitol-treated animals.
Conclusions:
- Purified recombinant luciferase serves as a sensitive and effective probe for quantitative analysis of blood-brain barrier (BBB) disruption.
- This method provides a reliable approach to study BBB integrity and its alterations in disease models.