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Selection and identification of a specific peptide binding to ovarian cancer cells from a phage-displayed peptide library

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Abstract

Objectives

Ovarian cancer is one of the most fatal gynecological malignancies. It is emergently needed to select a novel molecular fragment as a targeting element for the future development of molecular imaging diagnosis and targeting chemotherapy to ovarian cancer.

Results

After five rounds of biopanning, a total of 44 positive phage clones were selected from final phage displayed peptide library. Nine consensus sequences were found based on the assay of sequencing results, then one clone of each consensus group was characterized and identified further by immunofluorescence assay. The result showed the phage clone R20 presents best targeting capacity. Then we synthesized peptide (OSP2) clone R20 displayed, it was characterized with high specificity and sensitivity binding to human ovarian cancer by a tissue chip assay. The target of OSP2 was predicted and docked as human carbonic anhydrase XII (CA12), an important protein usually deregulated in cancer.

Conclusions

Taken together, OSP2 and its target indicate a novel investigation way in future to develop novel agent or drug delivery formulation for molecular imaging diagnosis and targeting chemotherapy of ovarian cancer.

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Data availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This work was supported by the Shaanxi Province Natural Science Foundation (2022JQ-219) and Guangxi Innovation Driven Development Major Project (Guike AA20302013).

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Correspondence to Guochao Nie, Li Xiao or Yingchun Hou.

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The authors report no conflicts of interest.

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This article does not contain any study with human participant or tissue from hospital.

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Informed consent was obtained from all individual participants included in the study.

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Gao, Q., Chen, L., Jia, C. et al. Selection and identification of a specific peptide binding to ovarian cancer cells from a phage-displayed peptide library. Biotechnol Lett 44, 951–960 (2022). https://doi.org/10.1007/s10529-022-03263-w

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  • DOI: https://doi.org/10.1007/s10529-022-03263-w

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