Role and mechanism of PSMA4 in prognosis, diagnosis and immune infiltration of lung adenocarcinoma

Jing ZHAO; Yanmei LI; Xueyue WANG; Tian NIE; Jie WANG; Qiming WENG; Jing ZHANG; Ye FAN

doi:10.16016/j.2097-0927.202405037

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Role and mechanism of PSMA4 in prognosis, diagnosis and immune infiltration of lung adenocarcinoma

Clinical Medicine | 更新时间：2026-01-09

- Role and mechanism of PSMA4 in prognosis, diagnosis and immune infiltration of lung adenocarcinoma
- Journal of Army Medical University Vol. 46, Issue 17, Pages: 1985-1993(2024)
- 作者机构：
  
  1.400037 重庆，陆军军医大学(第三军医大学)第二附属医院：临床技能培训中心
  2.610083 成都，中国人民解放军西部战区总医院检验科
  3.850000 拉萨，中国人民解放军西藏军区总医院儿科
  4.610072 成都，四川省人民医院消化内镜中心
  5.400037 重庆，陆军军医大学(第三军医大学)第二附属医院：野战内科研究所
  6.400037 重庆，陆军军医大学(第三军医大学)第二附属医院：呼吸科
- 作者简介：
- 基金信息：
  
  the Joint Medical Research of Chongqing Science and Technology Commission and Chongqing Health Commission(2023QNXM010)
- DOI：10.16016/j.2097-0927.202405037
  CLC： R394.3;R730.23;R734.2
- Received：13 May 2024，
  
  Revised：2024-06-29，
  
  Published：15 September 2024
- 稿件说明：
移动端阅览
Jing ZHAO, Yanmei LI, Xueyue WANG, et al. Role and mechanism of PSMA4 in prognosis, diagnosis and immune infiltration of lung adenocarcinoma[J]. Journal of Army Medical University, 2024, 46(17): 1985-1993.
DOI：

Jing ZHAO, Yanmei LI, Xueyue WANG, et al. Role and mechanism of PSMA4 in prognosis, diagnosis and immune infiltration of lung adenocarcinoma[J]. Journal of Army Medical University, 2024, 46(17): 1985-1993. DOI： 10.16016/j.2097-0927.202405037.

摘要

目的

探究PSMA4在肺腺癌(lung adenocarcinoma

LUAD)预后、诊断和免疫浸润中的作用和机制。

方法

从癌症基因组图谱(the cancer genome atlas

TCGA)数据库中获取LUAD患者的表达谱和临床信息。通过Wilcoxon秩和检验比较LUAD组(

=539)与正常组(

=59)PSMA4基因的表达水平。通过在GEO数据库下载GSE40791和GSE10072 LUAD数据集，验证PSMA4在LUAD组与正常组中的表达水平。收集10对2023年1-12月在陆军军医大学第二附属医院呼吸科进行纤维支气管镜肺活检术的LUAD患者的肿瘤和癌旁组织样本。采用RT-qPCR技术验证PSMA4在10对LUAD和癌旁组织中的表达。体外培养肺癌细胞和正常肺上皮细胞，通过RT-qPCR检测PSMA4在各组细胞中的表达。并对PSMA4的高低表达组进行了功能富集分析和免疫细胞浸润分析，通过Cox回归分析和Kaplan-Meier (KM)法确定PSMA4对于LUAD的诊断和预后的价值，并构建列线图预测不同时间点的总生存率。

结果

TCGA数据集、GSE40791和GSE10072 LUAD数据集中的表达数据显示，PSMA4在LUAD组中的表达明显高于正常组(

＜0.01)。RT-qPCR检测分析发现，PSMA4在LUAD和肺癌细胞中的表达显著高于癌旁组织和正常肺上皮细胞(

＜0.01)。PSMA4高表达是诊断LUAD和预后不良的标志物，与肿瘤微环境中效应记忆性T细胞、滤泡辅助性T细胞、B淋巴细胞、自然杀伤细胞、中央记忆性T细胞、肥大细胞的水平的降低有关。

结论

PSMA4对LUAD有良好的诊断效能，并且与LUAD的预后和免疫浸润密切相关。

Abstract

Objective

To investigate the role of PSMA4 in the prognosis

diagnosis and immune infiltration of lung adenocarcinoma (LUAD)

and explore its underlying mechanism.

Methods

The expression profiles and clinical data of LUAD patients were sourced from the Cancer Genome Atlas (TCGA) database. The expression level of PSMA4 in LUAD tissues (

=539) and normal tissues (

=59) were compared using the Wilcoxon rank-sum test. The expression levels of PSMA4 in LUAD tissues and normal tissues were validated by analyzing the GSE40791 and GSE10072 LUAD datasets obtained from the Gene Expression Omnibus (GEO) database. In addition

tumor and adjacent non-cancerous tissues were collected from 10 LUAD undergoing lung biopsy by fiberoptic bronchoscopy in Second Affiliated Hospital of Army Medical University from January to December 2023. The PSMA4 expression in above samples was further verified using RT-qPCR. RT-qPCR was performed to detect the expression of PSMA4 in lung cancer cells and normal lung epithelial cells. Functional enrichment analysis and immune cell infiltration analysis were conducted on the cells with high and low expression of PSMA4. Cox regression analysis and Kaplan-Meier (KM) survival analysis were used to determine the diagnostic and prognostic value of PSMA4 for LUAD

and a nomogram was constructed to predict the overall survival rate at different time points.

Results

The analysis of TCGA datasets

GSE40791

and GSE10072 LUAD data revealed that PSMA4 expression was significantly higher in LUAD tissues than in normal tissues (

0.01). RT-qPCR further confirmed that the expression of PSMA4 was obviously elevated in LUAD tissues and lung cancer cells than adjacent non-cancerous tissues and normal lung epithelial cells (

0.01). High PSMA4 expression could be regarded as a marker for LUAD diagnosis and poor prognosis

and was associated with reduced proportions of Tem cells

TFH cells

B cells

NK cells

Tcm cells

and mast cells in the tumor microenvironment.

Conclusion

PSMA4 presents significant diagnostic performance for LUAD

and is closely associated with the prognosis and immune infiltration of this malignancy.

关键词

Keywords

references

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