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Nuclear transport by laser-induced pressure transients
Tai-Yuan David Lin1, Daniel J McAuliffe, Norm Michaud
1Wellman Laboratories of Photomedicine, Department of Photopathology and Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA.
Pharmaceutical Research
|June 24, 2003
Summary
Laser-induced pressure transients create temporary nuclear pores, enabling the delivery of molecules into the nucleus for potential gene and drug therapy applications.
Area of Science:
- Cell biology
- Biophysics
- Molecular biology
Background:
- Nuclear envelope transport is crucial for cellular functions like differentiation and signal transduction.
- Physical methods for nuclear envelope permeabilization show promise for gene therapy.
- Laser-induced pressure transients offer a potential non-invasive method for cell membrane manipulation.
Purpose of the Study:
- To investigate the role of laser-induced pressure transients in creating temporary pores in the nuclear envelope.
- To assess the feasibility of using this method for molecular delivery into the nucleus.
Main Methods:
- Human peripheral blood mononuclear cells were exposed to laser-induced pressure transients in a solution containing 72 kDa fluoresceinated dextran.
- Fluorescence confocal microscopy was employed to visualize and quantify dextran entry into cytoplasmic and nuclear compartments.
Main Results:
- Laser-induced pressure transients successfully delivered 72 kDa fluoresceinated dextrans across the nuclear envelope into the nucleus.
- Temporary pores were formed in both the plasma membrane and the nuclear envelope.
- This method demonstrated efficacy in bypassing normal nuclear exclusion mechanisms.
Conclusions:
- Laser-induced pressure transients can create temporary nuclear pores, facilitating molecular transport.
- This technique holds significant potential as a novel tool for drug delivery and gene therapy applications.