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Pattekari P, Zheng Z, Zhang X, Levchenko T, Torchilin V, Lvov Y. Top-down and bottom-up approaches in production of aqueous nanocolloids of low solubility drug paclitaxel. Phys Chem Chem Phys 2011; 13:9014-9. [PMID: 21442095 PMCID: PMC4378541 DOI: 10.1039/c0cp02549f] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nano-encapsulation of a poorly soluble anticancer drug was demonstrated with a sonication assisted layer-by-layer polyelectrolyte coating (SLbL). We changed the strategy of LbL-encapsulation from making microcapsules with many layers in the walls for encasing highly soluble materials to using a very thin polycation/polyanion coating on low solubility nanoparticles to provide them with good colloidal stability. SLbL encapsulation of paclitaxel resulted in stable 100-200 nm diameter colloids with a high electrical surface ξ-potential (of -45 mV) and drug content in the nanoparticles of 90 wt%. In the top-down approach, nanocolloids were prepared by rupturing a powder of paclitaxel using ultrasonication and simultaneous sequential adsorption of oppositely charged biocompatible polyelectrolytes. In the bottom-up approach paclitaxel was dissolved in organic solvent (ethanol or acetone), and drug nucleation was initiated by the addition of aqueous polyelectrolyte assisted by ultrasonication. Paclitaxel release rates from such nanocapsules were controlled by assembling multilayer shells with variable thicknesses and were in the range of 10-20 h.
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Affiliation(s)
- P. Pattekari
- Institute for Micro manufacturing, Chemistry Dep., Louisiana Tech University, Ruston LA 71272. Fax: XX XXXX XXXX; Tel: XX XXXX XXXX
| | - Z. Zheng
- Institute for Micro manufacturing, Chemistry Dep., Louisiana Tech University, Ruston LA 71272. Fax: XX XXXX XXXX; Tel: XX XXXX XXXX
| | - X. Zhang
- Institute for Micro manufacturing, Chemistry Dep., Louisiana Tech University, Ruston LA 71272. Fax: XX XXXX XXXX; Tel: XX XXXX XXXX
| | - T. Levchenko
- Department of Pharmaceutical Sciences and Center for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University, Boston, MA 02115
| | - V. Torchilin
- Department of Pharmaceutical Sciences and Center for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University, Boston, MA 02115
| | - Y. Lvov
- Institute for Micro manufacturing, Chemistry Dep., Louisiana Tech University, Ruston LA 71272. Fax: XX XXXX XXXX; Tel: XX XXXX XXXX
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Levchenko T, Veitonmaki N, Lundkvist A, Gerhardt H, Ming Y, Berggren K, Kvanta A, Carlsson R, Holmgren L. Therapeutic antibodies targeting angiomotin inhibit angiogenesis
in vivo. FASEB J 2007; 22:880-9. [DOI: 10.1096/fj.07-9509com] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Tetyana Levchenko
- Department of Oncology and PathologyCancer Centre KarolinskaKarolinska InstituteSt. Erik's Eye HospitalStockholmSweden
| | - Niina Veitonmaki
- Department of Oncology and PathologyCancer Centre KarolinskaKarolinska InstituteSt. Erik's Eye HospitalStockholmSweden
- Biolnvent International ABSölvegatan 41LundSweden
| | | | | | - Yue Ming
- Department of Clinical NeuroscienceSection of Ophthalmology and VisionKarolinska InstituteSt. Erik's Eye HospitalStockholmSweden
| | | | - Anders Kvanta
- Department of Clinical NeuroscienceSection of Ophthalmology and VisionKarolinska InstituteSt. Erik's Eye HospitalStockholmSweden
| | | | - Lars Holmgren
- Department of Oncology and PathologyCancer Centre KarolinskaKarolinska InstituteSt. Erik's Eye HospitalStockholmSweden
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Verma D, Hartner W, Levchenko T, Torchilin V. Coenzyme Q10-loaded liposomes effectively protect the myocardium in rabbits with an acute experimental myocardial infarction. J Mol Cell Cardiol 2007. [DOI: 10.1016/j.yjmcc.2007.03.648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Holmgren L, Ambrosino E, Birot O, Tullus C, Veitonmäki N, Levchenko T, Carlson LM, Musiani P, Iezzi M, Curcio C, Forni G, Cavallo F, Kiessling R. A DNA vaccine targeting angiomotin inhibits angiogenesis and suppresses tumor growth. Proc Natl Acad Sci U S A 2006; 103:9208-13. [PMID: 16754857 PMCID: PMC1482591 DOI: 10.1073/pnas.0603110103] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Endogenous angiogenesis inhibitors have shown promise in preclinical trials, but clinical use has been hindered by low half-life in circulation and high production costs. Here, we describe a strategy that targets the angiostatin receptor angiomotin (Amot) by DNA vaccination. The vaccination procedure generated antibodies that detected Amot on the endothelial cell surface. Purified Ig bound to the endothelial cell membrane and inhibited endothelial cell migration. In vivo, DNA vaccination blocked angiogenesis in the matrigel plug assay and prevented growth of transplanted tumors for up to 150 days. We further demonstrate that a combination of DNA vaccines encoding Amot and the extracellular and transmembrane domains of the human EGF receptor 2 (Her-2)/neu oncogene inhibited breast cancer progression and impaired tumor vascularization in Her-2/neu transgenic mice. No toxicity or impairment of normal blood vessels could be detected. This work shows that DNA vaccination targeting Amot may be used to mimic the effect of angiostatin.
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Affiliation(s)
- Lars Holmgren
- *Department of Oncology and Pathology, Cancer Centre Karolinska, Karolinska Institutet, SE171 76 Stockholm, Sweden
| | - Elena Ambrosino
- Department of Clinical and Biological Sciences, University of Turin, I-10043 Orbassano, Italy
| | - Olivier Birot
- *Department of Oncology and Pathology, Cancer Centre Karolinska, Karolinska Institutet, SE171 76 Stockholm, Sweden
| | - Carl Tullus
- *Department of Oncology and Pathology, Cancer Centre Karolinska, Karolinska Institutet, SE171 76 Stockholm, Sweden
| | - Niina Veitonmäki
- *Department of Oncology and Pathology, Cancer Centre Karolinska, Karolinska Institutet, SE171 76 Stockholm, Sweden
| | - Tetyana Levchenko
- *Department of Oncology and Pathology, Cancer Centre Karolinska, Karolinska Institutet, SE171 76 Stockholm, Sweden
| | - Lena-Maria Carlson
- *Department of Oncology and Pathology, Cancer Centre Karolinska, Karolinska Institutet, SE171 76 Stockholm, Sweden
| | - Piero Musiani
- Aging Research Center, “Gabriele d’Annunzio” University Foundation, I-66013 Chieti, Italy; and
| | - Manuela Iezzi
- Aging Research Center, “Gabriele d’Annunzio” University Foundation, I-66013 Chieti, Italy; and
| | - Claudia Curcio
- Department of Clinical and Biological Sciences, University of Turin, I-10043 Orbassano, Italy
| | - Guido Forni
- Department of Clinical and Biological Sciences, University of Turin, I-10043 Orbassano, Italy
- Molecular Biotechnology Center, University of Turin, I-10123 Turino, Italy
| | - Federica Cavallo
- Department of Clinical and Biological Sciences, University of Turin, I-10043 Orbassano, Italy
- To whom correspondence should be addressed. E-mail:
| | - Rolf Kiessling
- *Department of Oncology and Pathology, Cancer Centre Karolinska, Karolinska Institutet, SE171 76 Stockholm, Sweden
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Abstract
Angiomotin was identified by its ability to bind angiostatin and has been shown to mediate its activity in vitro. The family of angiomotin-like protein consists of three members that have coiled-coil domains and conserved c-terminal PDZ-binding motifs. We show here that expression of angiomotin in mouse aortic endothelial (MAE) cells results in stabilization of tubes in the Matrigel assay. Control tubes start to regress after 72 h, whereas MAE-angiomotin (MAE Amot) tubes were stable for over 30 days. In contrast, cells expressing a functional mutant lacking the PDZ protein interaction motif did not migrate and form tubes. Cells from the established tubes invaded into the solidified matrigel. We therefore tested whether angiomotin promotes endothelial invasion. In microcarrier-based invasion in vitro assay, angiomotin-expressing cells invaded collagen matrix and formed tube-like branches. This was confirmed in vivo as injection of MAE-Amot cells promoted tumor growth and invasion into surrounding muscle tissue. Injection of cells transfected with the functional mutant resulted in establishment of noninvasive tumors surrounded by a capsule of fibrous tissue. These tumors remained in constant size or dormant over 3 weeks. Zymogel analysis of the transfected cells did not reveal any differences in proteolytic activity. However, time-lapse photography showed a significant increase in random motility in MAE-Amot cells. We conclude that angiomotin may promote angiogenesis by both stimulating invasion as well as stabilizing established tubes.
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Affiliation(s)
- Tetyana Levchenko
- Department of Oncology-Pathology, Cancer Centre Karolinska Institute, S-17176, Stockholm, Sweden
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Levchenko T, Aase K, Troyanovsky B, Bratt A, Holmgren L. Loss of responsiveness to chemotactic factors by deletion of the C-terminal protein interaction site of angiomotin. J Cell Sci 2003; 116:3803-10. [PMID: 12902404 DOI: 10.1242/jcs.00694] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
We have recently identified a novel protein, named angiomotin, by its ability to bind the angiogenesis inhibitor angiostatin in the yeast two-hybrid system. Angiomotin belongs to a family with two other members, AmotL-1 and -2 characterized by coiled-coil and C-terminal PDZ binding domains. Here we show that the putative PDZ binding motif of angiomotin serves as a protein recognition site and that deletion of three amino acids in this site results in inhibition of chemotaxis. Furthermore, endothelial cells expressing mutant angiomotin failed to migrate and form tubes in an in vitro tube formation assay. To study the effect of angiomotin on embryonic angiogenesis, we generated transgenic mice expressing wild-type angiomotin and the C-terminal deletion mutant driven by the endothelial cell-specific receptor tyrosine kinase (TIE) promoter. Expression of mutant angiomotin in endothelial cells inhibited migration into the neuroectoderm and intersomitic regions resulting in death at embryonic day 9.5. In contrast, mice expressing wild-type angiomotin developed normally and were fertile. These results suggest that the putative PDZ binding motif of angiomotin plays a critical role in regulating the responsiveness of endothelial cells to chemotactic cues.
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Affiliation(s)
- Tetyana Levchenko
- Department of Oncology-Pathology, Cancer Center Karolinska Institutet, S-17176 Stockholm, Sweden
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Troyanovsky B, Levchenko T, Månsson G, Matvijenko O, Holmgren L. Angiomotin: an angiostatin binding protein that regulates endothelial cell migration and tube formation. J Cell Biol 2001; 152:1247-54. [PMID: 11257124 PMCID: PMC2199208 DOI: 10.1083/jcb.152.6.1247] [Citation(s) in RCA: 299] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Angiostatin, a circulating inhibitor of angiogenesis, was identified by its ability to maintain dormancy of established metastases in vivo. In vitro, angiostatin inhibits endothelial cell migration, proliferation, and tube formation, and induces apoptosis in a cell type-specific manner. We have used a construct encoding the kringle domains 1--4 of angiostatin to screen a placenta yeast two-hybrid cDNA library for angiostatin-binding peptides. Here we report the identification of angiomotin, a novel protein that mediates angiostatin inhibition of migration and tube formation of endothelial cells. In vivo, angiomotin is expressed in the endothelial cells of capillaries as well as larger vessels of the human placenta. Upon expression of angiomotin in HeLa cells, angiomotin bound and internalized fluorescein-labeled angiostatin. Transfected angiomotin as well as endogenous angiomotin protein were localized to the leading edge of migrating endothelial cells. Expression of angiomotin in endothelial cells resulted in increased cell migration, suggesting a stimulatory role of angiomotin in cell motility. However, treatment with angiostatin inhibited migration and tube formation in angiomotin-expressing cells but not in control cells. These findings indicate that angiostatin inhibits cell migration by interfering with angiomotin activity in endothelial cells.
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Affiliation(s)
- Boris Troyanovsky
- Center for Genomics Research and Microbiology and Tumor Biology Center, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Tetyana Levchenko
- Center for Genomics Research and Microbiology and Tumor Biology Center, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Göran Månsson
- Center for Genomics Research and Microbiology and Tumor Biology Center, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Olga Matvijenko
- Center for Genomics Research and Microbiology and Tumor Biology Center, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Lars Holmgren
- Center for Genomics Research and Microbiology and Tumor Biology Center, Karolinska Institutet, S-171 76 Stockholm, Sweden
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