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Tumor Biology

, Volume 36, Issue 12, pp 9295–9301 | Cite as

Interaction analysis of IL-12A and IL-12B polymorphisms with the risk of colorectal cancer

  • Ruifen Sun
  • Fu Jia
  • Yundan Liang
  • Lijuan Li
  • Peng Bai
  • Fang Yuan
  • Linbo Gao
  • Lin Zhang
Research Article

Abstract

IL-12 is an antitumor cytokine with functions of inhibiting tumor growth, invasion, and metastasis, indicating that IL-12 is a promising candidate for cancer treatment. The aim of this study was to investigate the association of IL-12A rs568408, IL-12A rs2243115, and IL-12B rs3212227 with the susceptibility to colorectal cancer (CRC). Two hundred and fifty-seven histopathologically confirmed CRC patients and 236 age- and gender-matched controls were enrolled. The three polymorphisms were genotyped using a polymerase chain reaction–restriction fragment length polymorphism assay. We found that the IL-12A rs568408 AG/AA genotypes were associated with an increased risk of CRC with an adjusted odds ratio (OR) of 1.66 (95 % confidence interval (CI), 1.11–2.48). Stratified analyses showed that patients carrying the IL-12B rs3212227AC/CC genotypes had a 1.97-fold increased risk of tumor metastasis (OR = 1.97; 95 % CI, 1.04–3.70). Gene–gene interaction analysis showed that subjects carrying the IL-12A rs568408AG/AA and IL-12B rs3212227AA genotypes had a 2.40-fold increased risk of CRC (OR = 2.40; 95 % CI, 1.14–5.07) and individuals carrying the IL-12A rs568408AG/AA and IL-12B rs3212227AC/CC genotypes had a 1.93-fold increased risk of CRC (OR = 1.93; 95 % CI, 1.10–3.41). These findings indicate that IL-12A rs568408 and IL-12B rs3212227 may be related to the development of CRC.

Keywords

Interleukin-12A Interleukin-12B Polymorphism Colorectal cancer 

Notes

Funding

This study was funded by the National Natural Science Foundation of China (Nos. 81302149 and 81202387), the Ph.D. Programs Foundation of Ministry of Education of China (No. 20130181120011), Distinguished Young Scientist of Sichuan University (No. 2013SCU04A38), and the Science & Technology Pillar Program of Sichuan Province (Nos. 2014SZ0001 and 2013JY0013).

Conflicts of interest

None

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2015

Authors and Affiliations

  1. 1.Department of Immunology, West China School of Preclinical and Forensic MedicineSichuan UniversityChengduPeople’s Republic of China
  2. 2.Central LaboratoryYunnan University of Chinese Traditional MedicineKunmingPeople’s Republic of China
  3. 3.Department of Orthopedics, National Clinical Key Specialty, Yanan HospitalKunming Medical UniversityKunmingPeople’s Republic of China
  4. 4.Laboratory of Molecular and Translational Medicine, West China Institute of Women and Children’s Health, West China Second University HospitalSichuan UniversityChengduPeople’s Republic of China
  5. 5.Key Laboratory of Obstetric and Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University HospitalSichuan UniversityChengduPeople’s Republic of China
  6. 6.Department of Forensic Biology, West China School of Preclinical and Forensic MedicineSichuan UniversityChengduPeople’s Republic of China

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