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| Content Provider | Springer Nature Link |
|---|---|
| Author | Staflin, Karin Krueger, Joseph S. Hachmann, Janna Forsyth, Jane S. Lorger, Mihaela Steiniger, Sebastian C. J. Mee, Jenny Pop, Cristina Salvesen, Guy S. Janda, Kim D. Felding Habermann, Brunhilde |
| Copyright Year | 2010 |
| Abstract | Advanced metastatic disease is difficult to manage and specific therapeutic targets are rare. We showed earlier that metastatic breast cancer cells use the activated conformer of adhesion receptor integrin αvβ3 for dissemination. We now investigated if targeting this form of the receptor can impact advanced metastatic disease, and we analyzed the mechanisms involved. Treatment of advanced multi-organ metastasis in SCID mice with patient-derived scFv antibodies specific for activated integrin αvβ3 caused stagnation and regression of metastatic growth. The antibodies specifically localized to tumor lesions in vivo and inhibited αvβ3 ligand binding at nanomolar levels in vitro. At the cellular level, the scFs associated rapidly with high affinity αvβ3 and dissociated extremely slowly. Thus, the scFvs occupy the receptor on metastatic tumor cells for prolonged periods of time, allowing for inhibition of established cell interaction with natural αvβ3 ligands. Potential apoptosis inducing effects of the antibodies through interaction with caspase-3 were studied as potential additional mechanism of treatment response. However, in contrast to a previous concept, neither the RGD-containing ligand mimetic scFvs nor RGD peptides bound or activated caspase-3 at the cellular or molecular level. This indicates that the treatment effects seen in the animal model are primarily due to antibody interference with αvβ3 ligation. Inhibition of advanced metastatic disease by treatment with cancer patient derived single chain antibodies against the activated conformer of integrin αvβ3 identifies this form of the receptor as a suitable target for therapy. |
| Starting Page | 217 |
| Ending Page | 231 |
| Page Count | 15 |
| File Format | |
| ISSN | 02620898 |
| Journal | Clinical & Experimental Metastasis |
| Volume Number | 27 |
| Issue Number | 4 |
| e-ISSN | 15737276 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2010-03-12 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Advanced metastasis Treatment Activated integrin Patient antibodies Surgical Oncology Hematology Oncology Biomedicine general Cancer Research |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cancer Research Oncology |
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