Abstract
A method for delivering drugs to sites of disease extension in mediastinal nodes is described. Mediastinal node and lymphatic distributions were determined after intracavitary injection of the avidin/biotin-liposome system in normal rats. The effect of the injected dose on lymphatic targeting of liposomes after intraperitoneal injection of 99mTc-blue-biotin-liposomes and intrapleural injection of avidin, and vice versa, is presented. Scintigraphic imaging was used to follow the movement of 99mTc-blue-biotin- liposomes to determine the pharmacokinetics and organ uptake. Tissue biodistribution studies were performed 22 h after injection of the 99mTc-blue-biotin-liposomes. Results indicated that independent of the cavity in which each agent was injected, a dose of 5.0 mg of each agent results in higher mediastinal node targeting (8%-10% ID/Organ) as compared with the injection of a 0.5 mg dose (2%-5% ID/Organ, p < 0.05). Targeting of diaphragm and associated lymphatics was observed when 99mTc-blue- biotin-liposomes were injected in peritoneum and avidin in pleural space. In contrast, pleural, and pericardial lymphatic targeting was observed when 99mTc-blue-biotin-liposomes were injected in pleural space and avidin in peritoneum. Intracavitary injection of the avidin/biotin-liposome system could potentially be used for the delivery of prophylactic drugs that could reduce tumor metastasis and infection spread to mediastinal nodes.
Original language | English (US) |
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Pages (from-to) | 207-224 |
Number of pages | 18 |
Journal | Journal of Pharmaceutical Sciences |
Volume | 95 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2006 |
Keywords
- Avidin-biotin system
- Drug targeting
- Liposomes
- Lymphatic transport
- Nanoparticles
- Peritoneum
- Pharmacokinetics
- Pleural space
- Scintigraphy
- Technetium-99m
ASJC Scopus subject areas
- Pharmaceutical Science