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[PEG-liposome in DDS and clinical studies]
1Department of Pharmaceutics, Teikyo University.
Nihon Rinsho. Japanese Journal of Clinical Medicine
|April 29, 1998
Summary
Polyethylene glycol (PEG)-liposomes offer improved drug delivery by evading rapid clearance from the body. These long-circulating PEG-liposomes show significant potential for cancer therapy and targeted drug delivery applications.
Area of Science:
- Biotechnology
- Nanomedicine
- Drug Delivery Systems
Context:
- Liposomes are promising drug carriers but face rapid clearance by the reticuloendothelial system (RES).
- Polyethylene glycol (PEG)-coated liposomes evade RES uptake, leading to prolonged circulation times.
- This extended circulation is crucial for effective in vivo drug delivery.
Purpose:
- To review the development and potential of PEG-liposomes as advanced drug delivery systems.
- To highlight the enhanced pharmacokinetic properties and therapeutic efficacy of PEG-liposomes.
- To explore the future development of targeted immunoliposomes for cancer therapy.
Summary:
- PEG-liposomes demonstrate prolonged circulation in vivo by avoiding RES clearance.
- Studies in tumor-bearing mice show increased PEG-liposome accumulation in tumors.
- Clinical trials with PEG-liposome-encapsulated doxorubicin (DOXIL) show improved efficacy for Kaposi's sarcoma.
Impact:
- PEG-liposomes enhance drug delivery, particularly for cancer therapeutics.
- Development of long-circulating PEG-liposomes enables targeted delivery strategies.
- Future applications include immunoliposomes for targeted fusion and delivery of genetic material.