AUTHOR=Che Bangwei , Zhang Wenjun , Li Wei , Tang Kaifa , Yin Jingju , Liu Miao , Xu Shenghan , Huang Tao , Yu Ying , Huang Kunyuan , Peng Zheng , Zha Cheng 

TITLE=Bacterial lipopolysaccharide-related genes are involved in the invasion and recurrence of prostate cancer and are related to immune escape based on bioinformatics analysis

JOURNAL=Frontiers in Oncology

VOLUME=Volume 13 - 2023

YEAR=2023

URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2023.1141191

DOI=10.3389/fonc.2023.1141191

ISSN=2234-943X

ABSTRACT=Background
The composition of the tumor microbial microenvironment participates in the whole process of tumor disease. However, due to the limitations of the current technical level, the depth and breadth of the impact of microorganisms on tumors have not been fully recognized, especially in prostate cancer (PCa). Therefore, the purpose of this study is to explore the role and mechanism of the prostate microbiome in PCa based on bacterial lipopolysaccharide (LPS)-related genes by means of bioinformatics.
Methods
The Comparative Toxicogenomics Database (CTD) was used to find bacterial LPS-related genes. PCa expression profile data and clinical data were acquired from TCGA, GTEx, and GEO. The differentially expressed LPS-related hub gene (LRHG) were obtained by Venn diagram, and gene set enrichment analysis (GSEA) was used to investigate the putative molecular mechanism of LRHG. The immune infiltration score of malignancies was investigated using single-sample gene set enrichment analysis (ssGSEA). Using univariate and multivariate COX regression analysis, a prognostic risk score model and nomogram were developed. 
Results
6 LRHG were screened. LRHG was involved in functional phenotypes such as tumor invasion, fat metabolism, sex hormone response, DNA repair, apoptosis, and immunoregulation. And it can regulate the immune microenvironment in the tumor by influencing the antigen presentation of immune cells in the tumor. And a prognostic risk score and the nomogram which based on LRHG show that the low-risk score has a protective effect on patients.
Conclusion
Microbes control the PCa's direction of development using a sophisticated web of processes. Additionally, this study offers early support for the advantages of examining the prostate microbiome, specifically that a nomogram that incorporates clinical data and LRHG traits can aid in predicting individual outcomes, particularly to extend progression-free survival.