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Cited by 179

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Precision Targeting of Tumor Macrophages with a CD206 Binding Peptide

Open access
Scodeller, Pablo, Simón-Gracia, Lorena, Kopanchuk, Sergei, Tobi, Allan, Kilk, Kalle, Säälik, Pille, Kurm, Kaarel, Squadrito, Mario Leonardo, Kotamraju, Venkata Ramana, Rinken, Ago, De Palma, Michele, Ruoslahti, Erkki, Teesalu, Tambet·2017·Scientific Reports

Abstract

Tumor-associated macrophages (TAMs) expressing the multi-ligand endocytic receptor mannose receptor (CD206/MRC1) contribute to tumor immunosuppression, angiogenesis, metastasis, and relapse. Here, we describe a peptide that selectively targets M RC1- e xpressing TA M s (MEMs). We performed in vivo peptide phage display screens in mice bearing 4T1 metastatic breast tumors to identify peptides that target peritoneal macrophages. Deep sequencing of the peptide-encoding inserts in the selected phage pool revealed enrichment of the peptide CSPGAKVRC (codenamed “UNO”). Intravenously injected FAM-labeled UNO (FAM-UNO) homed to tumor and sentinel lymph node MEMs in different cancer models: 4T1 and MCF-7 breast carcinoma, B16F10 melanoma, WT-GBM glioma and MKN45-P gastric carcinoma. Fluorescence anisotropy assay showed that FAM-UNO interacts with recombinant CD206 when subjected to reducing conditions. Interestingly, the GSPGAK motif is present in all CD206-binding collagens. FAM-UNO was able to transport drug-loaded nanoparticles into MEMs, whereas particles without the peptide were not taken up by MEMs. In ex vivo organ imaging, FAM-UNO showed significantly higher accumulation in sentinel lymph nodes than a control peptide. This study suggests applications for UNO peptide in diagnostic imaging and therapeutic targeting of MEMs in solid tumors.

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Metadata

Authors
Scodeller, P., Simón-Gracia, L., Kopanchuk, S., Tobi, A., Kilk, K., Säälik, P., Kurm, K., Squadrito, M. L., Kotamraju, V. R., Rinken, A., De Palma, M., Ruoslahti, E., & Teesalu, T.
Venue
Scientific Reports
Published
2017-11-07
Volume
7
Issue
1
Pages
14655-14655
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2766886140
Cited by
179
References
6
FWCI
6.38
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Precision Targeting of Tumor Macrophages with a CD206 Binding Peptide. https://app.cochat.ai/papers/10.1038/s41598-017-14709-x
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Scodeller, P., Simón-Gracia, L., Kopanchuk, S., Tobi, A., Kilk, K., Säälik, P., Kurm, K., Squadrito, M. L., Kotamraju, V. R., Rinken, A., De Palma, M., Ruoslahti, E., & Teesalu, T. (2017). Precision Targeting of Tumor Macrophages with a CD206 Binding Peptide. Scientific Reports. https://doi.org/10.1038/s41598-017-14709-x

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