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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Balyasnikova, I. Albelda, S. M. Schultz, L. Fisher, A. B. Harshaw, D. W. Muzykantov, V. R. Christofidou-solomidou, M. |
| Description | Author Affiliation: Muzykantov VR ( Institute for Environmental Medicine, University of Pennsylvania, Philadelphia, PA, 19104-60608, USA. muzykant@mail.med.upenn.edu); |
| Abstract | Conjugation of drugs with antibodies to surface endothelial antigens is a potential strategy for drug delivery to endothelium. We studied antibodies to platelet-endothelial adhesion molecule 1 (PECAM-1, a stably expressed endothelial antigen) as carriers for vascular immunotargeting. Although 125I-labeled anti-PECAM bound to endothelial cells in culture, the antibody was poorly internalized by the cells and accumulated poorly after intravenous administration in mice and rats. However, conjugation of biotinylated anti-PECAM (b-anti-PECAM) with streptavidin (SA) markedly stimulated uptake and internalization of anti-PECAM by endothelial cells and by cells expressing PECAM. In addition, conjugation with streptavidin markedly stimulated uptake of 125I-labeled b-anti-PECAM in perfused rat lungs and in the lungs of intact animals after either intravenous or intraarterial injection. The antioxidant enzyme catalase conjugated with b-anti-PECAM/SA bound to endothelial cells in culture, entered the cells, escaped intracellular degradation, and protected the cells against H2O2-induced injury. Anti-PECAM/SA/125I-catalase accumulated in the lungs after intravenous injection or in the perfused rat lungs and protected these lungs against H2O2-induced injury. Thus, modification of a poor carrier antibody with biotin and SA provides an approach for facilitation of antibody-mediated drug targeting. Anti-PECAM/SA is a promising candidate for vascular immunotargeting of bioactive drugs. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 5 |
| Volume Number | 96 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1999-04-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antigens, CD31 Metabolism Endothelium, Vascular Immunotoxins Pharmacokinetics Lung Streptavidin Animals Antibodies Biological Transport Drug Effects Biotinylation Cells, Cultured Ultrastructure Ferritins Iodine Radioisotopes Kinetics Mice Rabbits Rats, Sprague-Dawley Pharmacology Tissue Distribution Umbilical Veins Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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