Abstract |
Bombesin (BBN), an analog of gastrin-releasing peptide (GRP), of which the receptors are over-expressed on various tumor cells, is able to bind to GRP receptor specifically. In this study, a near-infrared fluorescent dye (MPA) and polyethylene glycol (PEG) were conjugated to BBN analog to form BBN[7-14]-MPA and BBN[7-14]-SA-PEG-MPA. The successful synthesis of the two probes was proved by the characterization via sodium dodecylsulfate- polyacrylamide gel electrophoresis, infrared and optical spectra. Cellular uptakes studies indicated that BBN-based probes were mediated by gastrin-releasing peptide receptors (GRPR) on tumor cells and the PEG modified probe had higher affinity. The dynamic distribution and clearance investigations showed that the BBN-based probes were eliminated by the liver-kidney pathway. Furthermore, both of the BBN-based probes displayed tumor-targeting ability in GRPR over-expressed tumor-bearing mice. The PEG modified probe exhibited faster and higher tumor targeting capability than BBN[7-14]-MPA. The results implied that BBN[7-14]-SA-PEG-MPA could act as an effective fluorescence probe for tumor imaging.
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Authors | Haiyan Chen, Shunan Wan, Fenxia Zhu, Chuan Wang, Sisi Cui, Changli Du, Yuxiang Ma, Yueqing Gu |
Journal | Contrast media & molecular imaging
(Contrast Media Mol Imaging)
2014 Mar-Apr
Vol. 9
Issue 2
Pg. 122-34
ISSN: 1555-4317 [Electronic] England |
PMID | 24523057
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2014 John Wiley & Sons, Ltd. |
Chemical References |
- Fluorescent Dyes
- Radiopharmaceuticals
- Bombesin
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Topics |
- Animals
- Bombesin
- Cell Line, Tumor
- Fluorescent Dyes
- Humans
- Mice
- Neoplasms
(diagnosis, pathology)
- Positron-Emission Tomography
(methods)
- Radiopharmaceuticals
- Xenograft Model Antitumor Assays
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