Abstract
Background
Lymph node metastasis is the main metastatic mode of CRC. Lymph node metastasis affects patient prognosis.
Objective
To screen differential intestinal bacteria for CRC lymph node metastasis and construct a prediction model.
Methods
First, fecal samples of 119 CRC patients with lymph node metastasis and 110 CRC patients without lymph node metastasis were included for the detection of intestinal bacterial 16S rRNA. Then, bioinformatics analysis of the sequencing data was performed. Community structure and composition analysis, difference analysis, and intragroup and intergroup correlation analysis were conducted between the two groups. Finally, six machine learning models were used to construct a prediction model for CRC lymph node metastasis.
Results
The community richness and the community diversity at the genus level of the two groups were basically consistent. A total of 12 differential bacteria (Agathobacter, Catenibacterium, norank_f__Oscillospiraceae, Lachnospiraceae_FCS020_group, Lachnospiraceae_UCG-004, etc.) were screened at the genus level. Differential bacteria, such as Agathobacter, Catenibacterium, norank_f__Oscillospiraceae, and Lachnospiraceae_FCS020_group, were more associated with no lymph node metastasis in CRC. In the discovery set, the RF model had the highest prediction accuracy (AUC = 1.00, 98.89% correct, specificity = 55.21%, sensitivity = 55.95%). In the test set, SVM model had the highest prediction accuracy (AUC = 0.73, 72.92% correct, specificity = 69.23%, sensitivity = 88.89%). Lachnospiraceae_FCS020_group was the most important variable in the RF model. Lachnospiraceae_UCG − 004 was the most important variable in the SVM model.
Conclusion
CRC lymph node metastasis is closely related to intestinal bacteria. The prediction model based on intestinal bacteria can provide a new evaluation method for CRC lymph node metastasis.
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Availability of data and materials
The datasets generated for this study can be accessed from the NCBI Sequence Read Archive (SRA) database under the accession number PRJNA911321 and PRJNA911611.
Abbreviations
- PCC:
-
Pearson correlation coefficient
- LDA:
-
Linear discriminant analysis
- LR:
-
Logistic regression
- RF:
-
Random forest
- NN:
-
Neural network
- GBDT:
-
Gradient boosted decision tree
- SVM:
-
Support vector machine
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Acknowledgements
The authors gratefully acknowledge the database available to us for this study. We thank the patients and volunteers for their contributions to sample collection. All methods were performed in accordance with the relevant guidelines and regulations.
Funding
This work was supported by the Key Research and Development Project of Zhejiang Province (2022C03026) and Zhejiang Medical and Health Technology Project (2022KY1220).
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All authors participated in the conception and design of the study. Conceived and drafted the manuscript: WW and HS. Wrote the paper: WY and ZJ. Recruited the sample and analyzed the data: WY, ZJ and JY. Drew figures: WX, SY and FZ. All authors read and approved the paper.
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12094_2022_3061_MOESM3_ESM.tif
Supplementary Figure 3. Function prediction based on intestinal bacteria. A: Histogram of COG functional classification statistics. The abscissa represents the relative abundance, and the ordinate represents groups. B: COG functional classification statistical box diagram. The abscissa represents the COG secondary function number, and the ordinate represents the functional abundance. (TIF 936 KB)
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Yinhang, W., Jing, Z., Jie, Z. et al. Prediction model of colorectal cancer (CRC) lymph node metastasis based on intestinal bacteria. Clin Transl Oncol 25, 1661–1672 (2023). https://doi.org/10.1007/s12094-022-03061-w
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DOI: https://doi.org/10.1007/s12094-022-03061-w