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Antibody-mediated Hsp70 protein therapy.
James E Hansen1, William Sohn, Charles Kim
1Department of Medicine, San Fernando Valley Program, University of California-Los Angeles, Los Angeles, CA 90095, USA. jameshansen2004@hotmail.com
Brain Research
|April 25, 2006
Summary
Researchers developed a novel method to deliver Heat Shock Protein 70 (Hsp70) into cells using a unique protein transduction domain. This Hsp70 delivery system shows potential for treating diseases by enhancing cellular protection against stress.
Area of Science:
- Molecular Biology
- Cell Biology
- Neuroscience
Background:
- Intracellular Heat Shock Protein 70 (Hsp70) offers cytoprotection against various stressors.
- Increasing intracellular Hsp70 levels may aid in preventing and treating human diseases.
- Protein transduction domains facilitate the delivery of functional proteins into cells.
Purpose of the Study:
- To evaluate the efficacy of a novel single chain Fv fragment (mAb 3E10) as a protein transduction domain for delivering Hsp70 into cells.
- To determine if Fv-Hsp70 fusion protein can protect cells and neurons from stress-induced damage.
Main Methods:
- Generation of an Fv-Hsp70 fusion protein utilizing the mAb 3E10 Fv fragment.
- Production of Fv-Hsp70 in COS-7 cells and Pichia pastoris.
- Assessment of Fv-Hsp70 penetration into COS-7 cells and primary rat cortical neurons.
- Evaluation of cytoprotective effects against hydrogen peroxide-induced stress.
Main Results:
- The Fv-Hsp70 fusion protein successfully penetrated into COS-7 cells and primary rat cortical neurons.
- Pre-treatment with Fv-Hsp70 conferred significant protection to both cell types against hydrogen peroxide.
- Demonstrated the ability of the Fv fragment of mAb 3E10 to deliver proteins to neurons.
Conclusions:
- The Fv fragment of mAb 3E10 can effectively deliver functional Hsp70 into neuronal cells.
- This novel protein delivery system holds promise for developing Hsp70-based protein therapies for various diseases.