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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Mcintosh, Deirdre P. Tan, Xiang-yang Oh, Phil Schnitzer, Jan E. |
| Description | Author Affiliation: McIntosh DP ( Department of Pathology, Harvard Medical School, Beth Israel Hospital, Boston, MA 02215, USA.); |
| Abstract | Site-directed pharmacodelivery is a desirable but elusive goal. Endothelium and epithelium create formidable barriers to endogenous molecules as well as targeted therapies in vivo. Caveolae provide a possible, yet unproven, transcellular pathway to overcome such barriers. By using an antibody- and subfractionation-based strategy, we generated a monoclonal antibody specific for lung caveolae (TX3.833) that targets rat lungs after i.v. injection (up to 89% of dose in 30 min). Unlike control antibodies (nonbinding or to lipid rafts), TX3.833 targets lung caveolae that bud to form free vesicles for selective and quantal transendothelial transport to underlying tissue cells in vivo. Rapid sequential transcytosis can occur to the alveolar air space via epithelial caveolae. Conjugation to TX3.833 increases drug delivery to the lung up to 172-fold and achieves rapid, localized bioefficacy. We conclude that: (i) molecular heterogeneity of the endothelium and its caveolae permits vascular targeting to achieve theoretical expectations of tissue-specific delivery and bioefficacy; (ii) caveolae can mediate selective transcytosis in vivo; and (iii) targeting caveolae may provide a tissue-specific pathway for overcoming key cell barriers to many drug and gene therapies in vivo. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 4 |
| Volume Number | 99 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2002-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antibodies, Monoclonal Metabolism Caveolae Endothelium, Vascular Gene Transfer Techniques Animals Biological Transport Blotting, Western Enzyme-Linked Immunosorbent Assay Genetic Vectors Immunoglobulin G In Situ Hybridization Lung Perfusion Time Factors Tissue Distribution 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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