Abstract
Introduction
Increasing evidence indicates an important role of microbiota in cancer development and progression, while little is known about the correlation between microbiota and renal cell carcinoma (RCC). Thus, we performed this study to profile the intratumoral microbiota possibly associated with RCC.
Materials and methods
Paired RCC and adjacent normal tissue samples were collected from 24 patients with RCC. V3-V4 variable region of microbial 16S rRNA gene was sequenced using Illumina MiSeq. Sequencing reads were processed using QIIME. Differentially abundant bacterial taxa between groups were identified by LEfSe, and their potential functions were inferred by PICRUSt.
Results
Decreased species diversity was presented in RCC tissues (Simpson index, P = 0.0340), and the composition of the bacterial community in RCC tissues was significantly distinct from that in normal tissues (unweighted UniFrac distance, P = 0.026; weighted UniFrac distance, P = 0.017). Compared with normal tissues, 25 taxa increased and 47 reduced taxa were identified in RCC tissues. Among these taxa, the class Chloroplast (AUC = 0.91, P < 0.0001) and the order Streptophyta (AUC = 0.89, P < 0.0001) showed high indication accuracy to discriminate RCC tissues from normal tissues. Furthermore, nine altered pathways were identified in RCC tissues to reveal the potential microbial function.
Conclusions
Our results have uncovered the presence of distinct microbiota in RCC and adjacent normal tissues and provided a better understanding of the possible role of the intratumoral microbiota in RCC. Further studies are required to confirm our results and determine the real correlation between microbiota and RCC.
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Funding
This research was supported by the National Natural Science Foundation of China (Grant No. 32000650). Henan Provincial Scientific and Technological Research Project (Grant No. 192102310036), Henan Provincial Medical Scientific and Technological Research Project (Grant No. 201702191). The sponsors had no role in study design, data collection, data analysis, data interpretation, or writing of the report.
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Junpeng Wang, Xin Li, Kangdong Liu, and Tianzhong Yan conceived and designed the study. Junpeng Wang, Xin Li, Xiaoqiang Wu, and Zhiwei Wang performed the study and collected data. Junpeng Wang, Xin Li, Chan Zhang, and Guanghui Cao performed the analysis. Junpeng Wang, and Xin Li drafted, edited and revised the manuscript. Kangdong Liu and Tianzhong Yan supervised the study.
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Wang, J., Li, X., Wu, X. et al. Uncovering the microbiota in renal cell carcinoma tissue using 16S rRNA gene sequencing. J Cancer Res Clin Oncol 147, 481–491 (2021). https://doi.org/10.1007/s00432-020-03462-w
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DOI: https://doi.org/10.1007/s00432-020-03462-w