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Updated: Jul 9, 2026

Delivery of Proteins, Peptides or Cell-impermeable Small Molecules into Live Cells by Incubation with the Endosomolytic Reagent dfTAT
Published on: September 2, 2015
PTD-mediated delivery of anti-cell death proteins/peptides and therapeutic enzymes
1Department of Biochemistry and Cell Biology, Institute of Development and Aging Sciences, Graduate School of Medicine, Nippon Medical School, 1-396, Kosugi-cho, Nakahara-ku, Kawasaki-city, Kanagawa 211-8533, Japan. sada@nms.ac.jp
Abstract:
Millions of unnecessary cells are removed from our body everyday by apoptosis to ensure our survivals. Apoptosis is a highly coordinated process. Failure in apoptotic regulation results in disease. A large number of studies have demonstrated that accelerated apoptosis is involved in degenerative diseases, ischemic injuries, immunodeficiency and infertility. These studies have also revealed the molecular mechanisms of apoptosis signal transduction to provide therapeutic targets. On the other hand, protein transduction technology has been developed to deliver full-length proteins to various tissues including the brain. So far, many studies have shown that in vivo delivery of therapeutic proteins/peptides, including anti-apoptotic proteins, an anti-oxidant enzyme, a neuroprotectant, enzymes involved in purine or tyrosine metabolism, caspase inhibitors, c-Jun N-terminal kinase inhibitors and an NF-kappaB inhibitor, by protein transduction technology mitigates various diseases in animal models.
Insights
Apoptosis, programmed cell death, is crucial for survival, but its dysregulation causes disease. Protein transduction technology enables delivery of therapeutic proteins to treat these apoptosis-related conditions.
Area of Science:
- Cellular biology
- Molecular medicine
- Biotechnology
Background:
- Apoptosis (programmed cell death) is a vital physiological process essential for organismal survival.
- Dysregulation of apoptosis is implicated in various diseases, including degenerative disorders, ischemic injuries, immunodeficiency, and infertility.
- Understanding apoptosis signaling pathways provides targets for therapeutic intervention.
Purpose of the Study:
- To explore the therapeutic potential of protein transduction technology for diseases linked to apoptosis.
- To highlight the in vivo delivery of various therapeutic proteins using this technology.
Main Methods:
- Utilizing protein transduction technology for the delivery of full-length proteins and peptides.
- Administering therapeutic agents such as anti-apoptotic proteins, enzymes, and inhibitors in vivo.
Main Results:
- Protein transduction technology facilitates the delivery of therapeutic proteins to diverse tissues, including the brain.
- In vivo delivery of various therapeutic proteins and peptides has shown promise in mitigating disease models.
- Specific examples include delivery of anti-apoptotic proteins, antioxidant enzymes, neuroprotectants, metabolic enzymes, and inhibitors of key signaling pathways.
Conclusions:
- Protein transduction technology offers a viable strategy for delivering therapeutic proteins to combat diseases associated with apoptosis dysregulation.
- This technology holds significant potential for developing novel treatments for a range of degenerative and injury-related conditions.
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