Tumor Biology

, Volume 35, Issue 4, pp 3905–3915 | Cite as

Xeroderma pigmentosum complementation group D (XPD) gene polymorphisms contribute to bladder cancer risk: a meta-analysis

  • Su-Xia Li
  • Qiang-Sheng Dai
  • Su-Xiu Chen
  • Shao-Dan Zhang
  • Xiao-Yu Liao
  • Xia Deng
  • Hong-Bo Chi
  • Feng-Jie Li
  • Jin-Hong Zhu
  • Yi-Yan Jiang
Research Article


Numerous epidemiological studies have been conducted to investigate the association between Xeroderma pigmentosum complementation group D (XPD) Asp312Asn (rs1799793 G > A) and Lys751Gln (rs13181 A > C) polymorphisms and bladder cancer risk; however, the conclusions remain controversial. With this in mind, we performed this meta-analysis with 11 studies including 3,797 cases and 5,094 controls for Asp312Asn and 21 studies including 6,360 cases and 7,894 controls for Lys751Gln polymorphism. We searched available literatures from PubMed, Embase, and CBM databases. Crude odds ratios (ORs) and 95 % confidence intervals (CIs) were calculated to assess the strength of the associations. Moreover, to validate biological plausibility of our findings, the effects of these two polymorphisms on XPD gene expression within three ethnicities was determine by gene expression analysis based on imputed genotypes from HapMap. Overall, the variant allele of Asp312Asn polymorphism was associated with an increased risk of bladder cancer (Asn/Asn vs. Asp/Asp: OR = 1.51, 95 % CI = 1.19–1.91; Asp/Asn vs. Asp/Asp: OR = 1.23, 95 % CI = 1.12–1.35; recessive model: OR = 1.33, 95 % CI = 1.10–1.61; dominant model: OR = 1.32, 95 % CI = 1.14–1.52; and allele comparing: OR = 1.26, 95 % CI = 1.11–1.42). We found the Lys751Gln was associated with increased bladder cancer risk only under the recessive model (OR = 1.14, 95 % CI = 1.01–1.29). Stratification analyses demonstrated an increased risk for Asians and hospital-based studies under all genetic models while only under the dominant model for Caucasians as to the Asp312Asn polymorphism and for Caucasians under the recessive model as to the Lys751Gln polymorphism. We also found the Asp312Asn polymorphism can significantly influence mRNA expression levels among Asians and Caucasians, and the Lys751Gln polymorphism has a similar effect for Caucasians. Despite some limitations, this meta-analysis suggests that polymorphisms in XPD gene may contribute to bladder cancer susceptibility. These findings need further validation by large well-designed prospective studies.


Bladder cancer XPD Polymorphism Susceptibility Meta-analysis 



nucleotide excision repair


single nucleotide polymorphism


DNA repair capacity


Xeroderma pigmentosum complementation group D


Chinese Biomedical


Odds ratio


Confidence interval


Hardy–Weinberg equilibrium



This work was supported by a grant funded by Heilongjiang Education Department of China (1252HQ016).

Conflicts of interest



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2013

Authors and Affiliations

  • Su-Xia Li
    • 1
  • Qiang-Sheng Dai
    • 2
  • Su-Xiu Chen
    • 1
  • Shao-Dan Zhang
    • 3
  • Xiao-Yu Liao
    • 3
  • Xia Deng
    • 4
  • Hong-Bo Chi
    • 5
  • Feng-Jie Li
    • 5
  • Jin-Hong Zhu
    • 6
  • Yi-Yan Jiang
    • 1
  1. 1.Department of Tumor Rehabilitation, First HospitalWenzhou Medical UniversityWenzhouChina
  2. 2.Department of OncologyThe First Affiliated Hospital of Sun Yat-Sen UniversityGuangzhouChina
  3. 3.State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer MedicineSun Yat-sen University Cancer CenterGuangzhouChina
  4. 4.Department of Radiation Oncology, First HospitalWenzhou Medical UniversityWenzhouChina
  5. 5.Zhejiang Provincial Key Laboratory of Medical GeneticsWenzhou Medical UniversityWenzhouChina
  6. 6.Department of Molecular Epidemiology and Laboratory MedicineThe Affiliated Tumor Hospital of Harbin Medical UniversityHarbinChina

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