PMID- 35535267 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220716 IS - 1179-1322 (Print) IS - 1179-1322 (Electronic) IS - 1179-1322 (Linking) VI - 14 DP - 2022 TI - Decaprenyl Diphosphate Synthase Subunit 1 (PDSS1): A Potential Prognostic Biomarker and Immunotherapy-Target for Hepatocellular Carcinoma. PG - 1627-1639 LID - 10.2147/CMAR.S364346 [doi] AB - PURPOSE: PDSS1 (decaprenyl diphosphate synthase subunit 1) plays an important role in the progression of several types of tumor. However, the biological functions of PDSS1 remain unclear in patients with hepatocellular carcinoma (HCC). In this study, We attempted to determine the role of PDSS1 in predicting the survival and efficacy of immunotherapy for HCC patients. METHODS: We analyzed the expression of PDSS1 in pan-cancer by Tumor Immune Estimation Resource (TIMER) and UALCAN database. Next, we investigated the correlations between the expression and potential prognostic value of PDSS1 in pan-cancer by Gene Expression Profiling Interactive Analysis (GEPIA) and Kaplan-Meier plotter and further confirmed our finding in our study of 139 patients with HCC. Furthermore, we correlated expression patterns with the presence of immune cell infiltrates and immune regulatory molecules in HCC tissue by TIMER. Finally, its potential immune-related mechanism was explored by Gene Set Enrichment Analysis (GSEA). RESULTS: Multiple datasets demonstrate that PDSS1 is up-regulated in HCC tissues compared with adjacent tissues, which was validated at mRNA (databases) and protein levels (our cohort). Patients with higher PDSS1 expression had shorter overall survival and relapse-free survival. In addition, PDSS1 expression was positively related to early recurrence and served as an independent poor prognostic factor for HCC. Patients with higher PDSS1 expression had lower CD8+ T cells in HCC tissue, and PDSS1 deteriorates T cell exhaustion by promoting T cell surface inhibitory receptors' secretion and immunosuppressive cell proliferation. Furthermore, PDSS1 was positively correlated with the WNT, TGFbeta, VEGF, and other signaling pathways in HCC. CONCLUSION: PDSS1 is a potential prognostic biomarker and immunotherapy target for hepatocellular carcinoma. CI - (c) 2022 Yang et al. FAU - Yang, Yuping AU - Yang Y AD - Department of Gastroenterology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, Guangdong Province, 510630, People's Republic of China. FAU - Li, Jinying AU - Li J AD - Department of Gastroenterology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, Guangdong Province, 510630, People's Republic of China. FAU - Tang, Ming AU - Tang M AD - Department of Gastroenterology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, Guangdong Province, 510630, People's Republic of China. FAU - Nie, Biao AU - Nie B AD - Department of Gastroenterology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, Guangdong Province, 510630, People's Republic of China. FAU - Huang, Wei AU - Huang W AUID- ORCID: 0000-0002-3169-5031 AD - Department of Gastroenterology, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, Guangdong Province, 510630, People's Republic of China. LA - eng PT - Journal Article DEP - 20220503 PL - New Zealand TA - Cancer Manag Res JT - Cancer management and research JID - 101512700 PMC - PMC9078875 OTO - NOTNLM OT - decaprenyl diphosphate synthase subunit 1 OT - hepatocellular carcinoma OT - prognosis OT - tumor microenvironment COIS- The authors declare that they do not have any competing interests in this work. EDAT- 2022/05/11 06:00 MHDA- 2022/05/11 06:01 PMCR- 2022/05/03 CRDT- 2022/05/10 01:50 PHST- 2022/02/28 00:00 [received] PHST- 2022/04/27 00:00 [accepted] PHST- 2022/05/10 01:50 [entrez] PHST- 2022/05/11 06:00 [pubmed] PHST- 2022/05/11 06:01 [medline] PHST- 2022/05/03 00:00 [pmc-release] AID - 364346 [pii] AID - 10.2147/CMAR.S364346 [doi] PST - epublish SO - Cancer Manag Res. 2022 May 3;14:1627-1639. doi: 10.2147/CMAR.S364346. eCollection 2022.