Immunotargeting of Integrin α6ß4 for Single-Photon Emission Computed Tomography and Near-Infrared Fluorescence Imaging in a Pancreatic Cancer Model.
Mol Imaging
; 152016.
Article
em En
| MEDLINE
| ID: mdl-27030400
ABSTRACT
To explore suitable imaging probes for early and specific detection of pancreatic cancer, we demonstrated that α6ß4integrin is a good target and employed single-photon emission computed tomography (SPECT) or near-infrared (NIR) imaging for immunotargeting. Expression levels of α6ß4were examined by Western blotting and flow cytometry in certain human pancreatic cancer cell lines. The human cell line BxPC-3 was used for α6ß4-positive and a mouse cell line, A4, was used for negative counterpart. We labeled antibody against α6ß4with Indium-111 ((111)In) or indocyanine green (ICG). After injection of(111)In-labeled probe to tumor-bearing mice, biodistribution, SPECT, autoradiography (ARG), and immunohistochemical (IHC) studies were conducted. After administration of ICG-labeled probe, in vivo and ex vivo NIR imaging and fluorescence microscopy of tumors were performed. BxPC-3 tumor showed a higher radioligand binding in SPECT and higher fluorescence intensity as well as a delay in the probe washout in NIR imaging when compared to A4 tumor. The biodistribution profile of(111)In-labeled probe, ARG, and IHC confirmed the α6ß4specific binding of the probe. Here, we propose that α6ß4is a desirable target for the diagnosis of pancreatic cancer and that it could be detected by radionuclide imaging and NIR imaging using a radiolabeled or ICG-labeled α6ß4antibody.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Pancreáticas
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Integrina alfa6beta4
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Imagem Molecular
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Anticorpos Monoclonais
Tipo de estudo:
Diagnostic_studies
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Screening_studies
Limite:
Animals
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Humans
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article