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Background

The origin recognition complex (ORC), a six-subunit DNA-binding complex, participates in DNA replication in cancer cells. Specifically in prostate cancers, ORC participates the androgen receptor (AR) regulated genomic amplification and tumor proliferation throughout the entire cell cycle. Of note, ORC6, the smallest subunit of ORC, has been reported to be dysregulated in some types of cancers (including prostate cancer), however, its prognostic and immunological significances remain yet to be elucidated.

Methods

In the current study, we comprehensively investigated the potential prognostic and immunological role of ORC6 in 33 human tumors using multiple databases, such as TCGA, Genotype-Tissue Expression, CCLE, UCSC Xena, cBioPortal, Human Protein Atlas, GeneCards, STRING, MSigDB, TISIDB, and TIMER2 databases.

Results

ORC6 expression was significantly upregulated in 29 types of cancers compared to the corresponding normal adjacent tissues. ORC6 overexpression correlated with higher stage and worse prognostic outcomes in most cancer types analyzed. Additionally, ORC6 was involved in the cell cycle pathway, DNA replication, and mismatch repair pathways in most tumor types. A negative correlation was observed between the tumor endothelial cell infiltration and ORC6 expression in almost all tumors, whereas the immune infiltration of T regulatory cell was noted to be statistically positively correlated with the expression of ORC6 in prostate cancer tissues. Furthermore, in most tumor types, immunosuppression-related genes, especially TGFBR1 and PD-L1 (CD274), exhibited a specific correlation with the expression of ORC6.

Conclusions

This comprehensive pan-cancer analysis revealed that ORC6 expression serves as a prognostic biomarker and that ORC6 is involved in the regulation of various biological pathways, the tumor microenvironment, and the immunosuppression status in several human cancers, suggesting its potential diagnostic, prognostic, and therapeutic value in pan-cancer, especially in prostate adenocarcinoma."xsd:string
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http://purl.uniprot.org/citations/36978046http://purl.uniprot.org/core/author"Gao L."xsd:string
http://purl.uniprot.org/citations/36978046http://purl.uniprot.org/core/author"Lin Y."xsd:string
http://purl.uniprot.org/citations/36978046http://purl.uniprot.org/core/author"Zhang Y."xsd:string
http://purl.uniprot.org/citations/36978046http://purl.uniprot.org/core/author"Wang J."xsd:string
http://purl.uniprot.org/citations/36978046http://purl.uniprot.org/core/author"Yu D."xsd:string
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http://purl.uniprot.org/citations/36978046http://purl.uniprot.org/core/author"Tuo Z."xsd:string
http://purl.uniprot.org/citations/36978046http://purl.uniprot.org/core/date"2023"xsd:gYear
http://purl.uniprot.org/citations/36978046http://purl.uniprot.org/core/name"BMC Cancer"xsd:string
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http://purl.uniprot.org/citations/36978046http://purl.uniprot.org/core/title"ORC6, a novel prognostic biomarker, correlates with T regulatory cell infiltration in prostate adenocarcinoma: a pan-cancer analysis."xsd:string
http://purl.uniprot.org/citations/36978046http://purl.uniprot.org/core/volume"23"xsd:string
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