# Public Database-based Study to Explore the Expression and Role of DDB1 in Lung Adenocarcinoma

**Authors:** Xinkai ZOU, Ziyi HE, Yanfei ZHANG, Yi HU, Xiaomin WANG, Zhongjie WU

PMC · DOI: 10.3779/j.issn.1009-3419.2025.102.12 · Chinese Journal of Lung Cancer · 2025-04-20

## TL;DR

This study explores how DDB1, a DNA repair protein, is linked to lung adenocarcinoma progression and poor patient outcomes.

## Contribution

The study identifies DDB1 as a potential prognostic marker and therapeutic target in lung adenocarcinoma.

## Key findings

- DDB1 is overexpressed in lung adenocarcinoma and correlates with advanced tumor stage and poor survival.
- DDB1 is associated with immune cell infiltration and involved in DNA repair and RNA transcription regulation.
- DDB1 is highly expressed in T cells, alveolar macrophages, and dendritic cells in lung adenocarcinoma.

## Abstract

肺腺癌（lung adenocarcinoma, LUAD）是非小细胞肺癌（non-small cell lung cancer, NSCLC）的主要亚型。损伤特异性DNA结合蛋白1（damage-specific DNA binding protein 1, DDB1）作为CUL4-DDB1泛素连接酶复合体的核心蛋白，参与调控DNA损伤修复、表观遗传修饰及细胞周期检查点激活等关键生物学过程。有报道DDB1通过DNA修复与RNA转录调控参与肿瘤进展，但其在LUAD中的表达及作用尚不明确。本研究旨在探讨DDB1在LUAD中的表达和作用。

利用UALCAN、Kaplan-Meier Plotter、GEPIA等数据库，对DDB1在LUAD中的表达及预后、临床病理特征等进行分析；通过GeneMANIA和Metascape构建相互作用网络及富集功能通路；结合TISIDB评估DDB1与免疫细胞浸润相关性，通过单细胞测序对细胞亚型的聚类结果和DDB1在不同免疫细胞亚群中的表达情况进行分析；最后，利用组织芯片进一步验证DDB1在LUAD中的表达及预后价值。

DDB1在LUAD组织中的表达显著高于正常组织（P<0.01），且高表达与肿瘤原发灶-淋巴结-转移（tumor-node-metastasis, TNM）分期较晚（P<0.001）、淋巴结转移（P<0.001）及预后不良（P<0.001）有关。功能富集显示DDB1参与DNA修复与RNA转录调控。TISIDB评估发现DDB1与免疫细胞的表达水平呈负相关，提示存在免疫微环境调控潜力。单细胞分析显示，DDB1主要在T细胞、肺泡巨噬细胞以及树突状细胞中表达。组织芯片证实DDB1高表达组总生存期更短（P<0.001），Cox多因素分析表明DDB1为预测LUAD预后的独立因子。

DDB1在LUAD中高表达，与患者后不良有关，并且与肿瘤免疫细胞浸润密切相关，通过DNA修复与RNA转录调控参与肿瘤发生发展。DDB1可作为LUAD潜在的预后标志物及治疗靶点。

Correlation between DDB1 expression and clinicopathological characteristics

Cox unifactorial and multifactorial risk model analysis of risk factors affecting prognosis of LUAD patients

## Linked entities

- **Genes:** DDB1 (damage specific DNA binding protein 1) [NCBI Gene 1642]
- **Proteins:** DDB1 (damage specific DNA binding protein 1)
- **Diseases:** lung adenocarcinoma (MONDO:0005061), non-small cell lung cancer (MONDO:0005233)

## Full-text entities

- **Genes:** DDB1 (damage specific DNA binding protein 1) [NCBI Gene 1642] {aka DDBA, UV-DDB1, WHIKERS, XAP1, XPCE, XPE}
- **Diseases:** lymph node metastasis (MESH:D008207), tumor (MESH:D009369), LUAD (MESH:D000077192), NSCLC (MESH:D002289)

## Full text

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## Figures

7 figures with captions in the complete paper: https://tomesphere.com/paper/PMC12096096/full.md

## References

27 references — full list in the complete paper: https://tomesphere.com/paper/PMC12096096/full.md

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Source: https://tomesphere.com/paper/PMC12096096