Due to the lack of an effective and noninvasive screening tool, the early diagnosis of colorectal cancer (CRC) is currently difficult. For the early diagnosis of CRC, we have developed Fe3O4-Dye800-single chain fragment variable (ScFv)egfr/vegfr nanoprobes. ScFvegfr/vegfr (ScFv2) conjugated onto Fe3O4 nanoprobes efficiently recognized CRC tumors in vitro and in vivo. Near-infrared fluorescence imaging modalities such as Dye800 were utilized simultaneously with magnetic resonance to enhance detection efficiency. Fe3O4-Dye800-ScFv2 successfully detected tiny CRC tumors; the synergistic ScFv2 successfully enhanced CRC targeting. Thus, Fe3O4-Dye800-ScFv2 nanoprobes may represent a new molecular imaging strategy for the early detection of CRC.
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This work was financially supported by the National Natural Science Foundation of China under Grant No. 81671757 and the CAMS Innovation Fund for Medical Sciences under No.2016-I2 M-1-001 and Beijing Nova Program under Grant No. Z181100006218061. All the authors in this paper thank the Beijing Gegen Biotechnology Co, Ltd for providing the ScFv fragments and the Key Laboratory of Molecular Imaging, Institute of Automation, Chinese Academy of Sciences for imaging equipment.
The supplementary material for this article can be found at https://doi.org/10.1557/mrc.2018.127.
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Wang, Q., Zhao, X., Yan, H. et al. A cross-talk EGFR/VEGFR-targeted bispecific nanoprobe for magnetic resonance/near-infrared fluorescence imaging of colorectal cancer. MRS Communications 8, 1008–1017 (2018). https://doi.org/10.1557/mrc.2018.127