A novel functional polymorphism, 16974 A/C, in the interleukin-12-3' untranslated region is associated with risk of glioma.
Genetic factors are important in the development of glioma. Interleukin-12 (IL-12) is a multifunctional cytokine that induces Interferon (IFN)-gamma secretion and plays an important role in antitumor immunity. Interleukin-27 (IL-27) is a novel IL-12 family member, and the present studies demonstrate that IL-27 mediates a potent antitumor activity. The aim of this study was to investigate whether IL-12 and IL-27 gene polymorphisms and their serum levels are associated with glioma. We analyzed IL-12 gene 16974 A/C and IL-27 gene -964 A/G, 2905 T/G, and 4730 T/C polymorphisms in 210 patients with glioma and 220 matched controls, using polymerase chain reaction-restriction fragment length polymorphism method and DNA sequencing methods, while serum IL-12p40 and IL-27p28 levels were measured by enzyme-linked immunosorbent assay. Serum IL-12p40 and IL-27p28 levels were decreased in patients with glioma compared with controls (p < 0.01). There were significant differences in the genotype and allele frequencies of the IL-12 gene 16974 A/C polymorphism between the group of patients with glioma and the control group (p < 0.05). Moreover, genotypes carrying the IL-12 16974 C variant allele were associated with decreased serum IL-12p40 and IL-27p28 levels compared to the homozygous wild-type genotype in patients with glioma. The IL-12 gene 16974 A/C polymorphism may regulate expression of the serum IL-12p40 and IL-27p28, and associate with increased risk of glioma. Thus, genotypes carrying the IL-12 16974 C variant allele had a decreased ability to produce IL-12 and IL-27, which may contribute to glioma susceptibility.
Department of Neurosurgery, Affiliated Hospital of Youjiang Medical College for Nationalities, Guangxi, China. yyzhaobang@gmail.com
Bang
B
Zhao
Lan-Qing
LQ
Meng
Hai-Neng
HN
Huang
Yun
Y
Pan
Qun-Qing
QQ
Xu
D020413:3' Untranslated Regions / Q000235:genetics*; D000328:Adult; D001932:Brain Neoplasms / Q000097:blood / Q000235:genetics* / Q000473:pathology; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D005910:Glioma / Q000097:blood / Q000235:genetics* / Q000473:pathology; D006801:Humans; D053762:Interleukin-12 Subunit p40 / Q000097:blood / Q000235:genetics*; D020381:Interleukin-17 / Q000097:blood / Q000235:genetics; D008297:Male; D011110:Polymorphism, Genetic / Q000235:genetics*; D011379:Prognosis; D011401:Promoter Regions, Genetic / Q000235:genetics; D012307:Risk Factors
D020413:3' Untranslated Regions; D053762:Interleukin-12 Subunit p40; D020381:Interleukin-17