Microvascular biodistribution of L19-SIP in angiogenesis targeting strategies
Introduction - Various strategies using L19-mediated fibronectin targeting have become useful clinical tools in anti-tumour therapy and diagnostics. The aim of our study was to characterise the microvascular biodistribution and binding process during tumour angiogenesis and after anti-angiogenic the...
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| Hauptverfasser: | , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
9 March 2011
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| In: |
European journal of cancer
Year: 2011, Jahrgang: 47, Heft: 8, Pages: 1276-1284 |
| ISSN: | 1879-0852 |
| DOI: | 10.1016/j.ejca.2011.02.001 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.ejca.2011.02.001 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0959804911000840 
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| Verfasserangaben: | Marcus Czabanka, Güliz Parmaksiz, Simon H. Bayerl, Melina Nieminen, Eveline Trachsel, Hans D. Menssen, Ralf Erber, Dario Neri, Peter Vajkoczy |
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| 245 | 1 | 0 | |a Microvascular biodistribution of L19-SIP in angiogenesis targeting strategies |c Marcus Czabanka, Güliz Parmaksiz, Simon H. Bayerl, Melina Nieminen, Eveline Trachsel, Hans D. Menssen, Ralf Erber, Dario Neri, Peter Vajkoczy |
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| 520 | |a Introduction - Various strategies using L19-mediated fibronectin targeting have become useful clinical tools in anti-tumour therapy and diagnostics. The aim of our study was to characterise the microvascular biodistribution and binding process during tumour angiogenesis and after anti-angiogenic therapy. - Materials and methods - SF126 glioma and F9 teratocarcinoma cells were implanted into dorsal skin fold chambers (SF126: n=4; F9: n=6). Using fluorescence and confocal intravital microscopy the biodistribution process was assessed at t=0h, t=4h and t=24h after intravenous application of Cy3-L19-SIP. Sunitinib treatment was applied for six days and microscopy was performed 2 and 6days after treatment initiation. Analysed parameters included: vascular and interstitial binding, preferential binding sites of L19-SIP, microvascular blood flow rate, microvascular permeability. Histological analysis included CD31 and DAPI. - Results - L19-SIP showed a specific and time-dependent neovascular binding with a secondary extravasation process reaching optimal vascular/interstitial binding ratio 4hours after iv administration (F9: L19-SIP: vascular binding: 74.6±14.5; interstitial binding: 46.8±12.1; control vascular: 22,2±16.6). Angiogenic sprouts were preferred binding sites (F9: L19-SIP: 188±15.5; RTV: 90.6±13.5). Anti-angiogenic therapy increased microvascular hemodynamics (SF126: Su: 106.6±13.3μl/sec; Untreated: 19.7±9.1μl/sec) and induced increased L19-SIP accumulation (SF 126: t24; Su: 92.6±2.7; Untreated: 71.9±5.9) in therapy resistant tumour vessels. - Conclusion - L19-SIP shows a time and blood-flow dependent microvascular biodistribution process with angiogenic sprouts as preferential binding sites followed by secondary extravasation of the antibody. Microvascular biodistribution is enhanced in anti-angiogenic-therapy resistant tumour vessels. | ||
| 650 | 4 | |a Angiogenesis | |
| 650 | 4 | |a Anti-angiogenic therapy | |
| 650 | 4 | |a Antibody-based vascular targeting | |
| 650 | 4 | |a Extra domain B of fibronectin | |
| 650 | 4 | |a L19-SIP | |
| 700 | 1 | |a Parmaksiz, Güliz |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bayerl, Simon H. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Nieminen, Melina |e VerfasserIn |4 aut | |
| 700 | 1 | |a Trachsel, Eveline |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Vajkoczy, Peter |e VerfasserIn |4 aut | |
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