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Plasma exosomal protein PLG and SERPINA1 in colorectal cancer diagnosis and coagulation abnormalities

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Abstract

Purpose

Early diagnosis of colorectal cancer (CRC) is critical to patient prognosis; however, there is lack of non-invasive biomarkers that are extremely sensitive and specific for early screening and diagnosis. Exosomes are a novel tool applied to the diagnosis and treatment of cancer. Changes in plasma exosomal proteins have a certain relationship with the development of various diseases including tumors. Here, we aimed to find exosomal biomarkers for early diagnosis of CRC.

Methods

Exosomes obtained by ultracentrifugation from CRC patients and healthy donors were characterized by transmission electron microscopy (TEM), qNano and western blotting. Proteomic and functional enrichment analyses confirmed differences in the specific expression of exosomal proteins in plasma between CRC patients and healthy donors. Western blotting with enzyme-linked immunosorbent assay (ELISA) was used to verify the difference proteins. Statistical methods were used to analyze the relationship between protein levels and CRC.

Results

The expression levels of serpin peptidase inhibitor clade A member 1 (SERPINA1) and fibrinogen (PLG) in CRC patients were significantly higher than those in healthy groups. Receptor operating characteristic (ROC) curves analysis was superior to CEA and CA19-9 for the diagnosis of colorectal cancer and early-stage colorectal cancer. The two were related to TNM staging and coagulation, and the difference was statistically significant.

Conclusion

The results of this study have potential value in advancing the clinical diagnosis of colorectal cancer.

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Data availability

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

References

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Funding

This work was supported by Shandong Provincial Natural Science Foundation (ZR2020LZL017, ZR2019PH023).

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Authors and Affiliations

Authors

Contributions

Experiment was designed and supervision by LX and XGS. LL and GXC written the first draft as well as data analysis. Material preparation and samples collection were performed by ZZ, BBZ, QRZ and SW. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Li Xie.

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Competing interests

The authors declare no competing interests.

Conflict of interest

The authors have no relevant financial or non-financial interests to disclose.

Ethical approval

This study was approved by the Ethics Committee of Shandong Cancer Hospital and Institute (No. 20171008). The patients/participants provided written informed consent for the participant's reference.

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Supplementary Information

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Supplementary file1 (DOCX 322 KB)

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Li, L., Song, X., Chen, G. et al. Plasma exosomal protein PLG and SERPINA1 in colorectal cancer diagnosis and coagulation abnormalities. J Cancer Res Clin Oncol 149, 8507–8519 (2023). https://doi.org/10.1007/s00432-023-04776-1

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  • DOI: https://doi.org/10.1007/s00432-023-04776-1

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