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Purpose

RNA polymerase I subunit D (POLR1D) is involved in the synthesis of ribosomal RNA precursors and small RNAs, but its mechanism in the development and progression of colorectal cancer (CRC) remains ambiguous. Thus, this research aimed to investigate POLR1D's expression and significance in human CRC patients and evaluate its association with clinicopathological characteristics.

Methods

Matched fresh-frozen cancerous and non-cancerous tissues were collected from 100 patients diagnosed with CRC. Immunohistochemical, Western blot, and quantitative real-time polymerase chain reaction analyses were adopted to validate the correlation between POLR1D expression and clinicopathological parameters in CRC tissues and adjacent normal tissues (ANTs).

Results

POLR1D expression in CRC tissues was significantly higher than in the ANTs. χ2 test and Spearman's correlative analysis showed that a high POLR1D expression is significantly associated with clinical stage, Dukes stage, tumor differentiation, depth of invasion, and metastasis (p < 0.05). It is not correlated with gender, age, and tumor location and size (p > 0.05). Kaplan-Meier survival curves show that the overall survival (OS) time for the low expression group is remarkably longer than for the high expression group (p < 0.0015). Univariate and multivariate analyses indicate that a high POLR1D expression is an independent prognostic factor for poor OS (p = 0.000).

Conclusion

The findings of this study strongly indicate that POLR1D plays a pivotal role in the occurrence and progression of CRC. It might be an independent adverse prognostic factor for CRC patients and could serve as a potential therapeutic target for clinical diagnosis in CRC and anticancer drug development."xsd:string
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http://purl.uniprot.org/citations/31722331http://purl.uniprot.org/core/author"Liu C."xsd:string
http://purl.uniprot.org/citations/31722331http://purl.uniprot.org/core/author"Wu J."xsd:string
http://purl.uniprot.org/citations/31722331http://purl.uniprot.org/core/author"Tian Y."xsd:string
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http://purl.uniprot.org/citations/31722331http://purl.uniprot.org/core/author"Wang G."xsd:string
http://purl.uniprot.org/citations/31722331http://purl.uniprot.org/core/author"Zhong Y."xsd:string
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http://purl.uniprot.org/citations/31722331http://purl.uniprot.org/core/title"Expression and Clinical Significance of POLR1D in Colorectal Cancer."xsd:string
http://purl.uniprot.org/citations/31722331http://purl.uniprot.org/core/volume"98"xsd:string
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