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Article

A novel molecular probe 131I-K237 targeting tumor angiogenesis in human prostate cancer xenografts

  • Authors:
    • Qian Zhao
    • Yu Zhang
    • Jun Guo
    • Juan Li
  • View Affiliations / Copyright

    Affiliations: Department of Nuclear Medicine, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China, Department of Nuclear Medicine, Affiliated Hospital of Luzhou Medical College, Luzhou, Sichuan 646000, P.R. China, Department of Nuclear Medicine, Postgraduate College of Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
  • Pages: 1363-1367
    |
    Published online on: March 18, 2015
       https://doi.org/10.3892/mmr.2015.3504
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Abstract

Specific molecular probes are essential for the early diagnosis of prostate cancer. In addition, peptides have been shown to have numerous uses as diagnostic and therapeutic molecular probes. The K237 peptide binds to the vascular endothelial growth factor receptor with high affinity and specificity, and was predicted to have potential use as a probe in tumor angiogenesis. The overall aim of the present study was to assess the diagnostic potential of 131I‑K237 as a molecular probe for prostate cancer. The K237 peptide was radiolabeled with 131I using an Iodogen method. The radiolabeling efficiency and radiochemical purity were found to be 73.7±3.2 and 96.7±0.6%, respectively, which were determined using thin layer chromatography and high performance liquid chromatography in vitro. Cellular uptake and competition binding experiments were used to identify the affinity of 131I‑K237 to LNCaP prostate cancer cells. The binding ratio of 131I‑K237 to LNCaP cells in the experimental group was 95.8±1.5%, whereas the binding ratios in the 5 kBq Na131I, 10 kBq Na131I, 15 kBq Na131I and PBS groups were 8.2±0.4, 8.3±0.2, 8.5±0.2 and 0.0%, respectively. In addition, the binding ratio of 131I‑K237 to LNCaP significantly decreased with the increased dose of unlabeled K237. A total of 40 male BALB/c mice with LNCaP xenografts were used for biodistribution and single photon emission computed tomography imaging analysis. An image was obtained and tumors were visible from 2 h post injection of 131I‑K237. In conclusion, the results of the present study showed that 131I‑K237 had a high affinity for LNCaP cells and may be considered as a candidate diagnostic molecular probe for prostate cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Zhao Q, Zhang Y, Guo J and Li J: A novel molecular probe 131I-K237 targeting tumor angiogenesis in human prostate cancer xenografts. Mol Med Rep 12: 1363-1367, 2015.
APA
Zhao, Q., Zhang, Y., Guo, J., & Li, J. (2015). A novel molecular probe 131I-K237 targeting tumor angiogenesis in human prostate cancer xenografts. Molecular Medicine Reports, 12, 1363-1367. https://doi.org/10.3892/mmr.2015.3504
MLA
Zhao, Q., Zhang, Y., Guo, J., Li, J."A novel molecular probe 131I-K237 targeting tumor angiogenesis in human prostate cancer xenografts". Molecular Medicine Reports 12.1 (2015): 1363-1367.
Chicago
Zhao, Q., Zhang, Y., Guo, J., Li, J."A novel molecular probe 131I-K237 targeting tumor angiogenesis in human prostate cancer xenografts". Molecular Medicine Reports 12, no. 1 (2015): 1363-1367. https://doi.org/10.3892/mmr.2015.3504
Copy and paste a formatted citation
x
Spandidos Publications style
Zhao Q, Zhang Y, Guo J and Li J: A novel molecular probe 131I-K237 targeting tumor angiogenesis in human prostate cancer xenografts. Mol Med Rep 12: 1363-1367, 2015.
APA
Zhao, Q., Zhang, Y., Guo, J., & Li, J. (2015). A novel molecular probe 131I-K237 targeting tumor angiogenesis in human prostate cancer xenografts. Molecular Medicine Reports, 12, 1363-1367. https://doi.org/10.3892/mmr.2015.3504
MLA
Zhao, Q., Zhang, Y., Guo, J., Li, J."A novel molecular probe 131I-K237 targeting tumor angiogenesis in human prostate cancer xenografts". Molecular Medicine Reports 12.1 (2015): 1363-1367.
Chicago
Zhao, Q., Zhang, Y., Guo, J., Li, J."A novel molecular probe 131I-K237 targeting tumor angiogenesis in human prostate cancer xenografts". Molecular Medicine Reports 12, no. 1 (2015): 1363-1367. https://doi.org/10.3892/mmr.2015.3504
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