Glioma is a highly heritable disease with a strong genetic component. The N6-methyladenosine (m
6
A) modification core genes play important roles in the context of cancer. However, the effects of polymorphisms in the m
6
A modification core genes on the risk of pediatric glioma remain undefined. Here, we intended to demonstrate the relationship between 24 functional single-nucleotide polymorphisms (SNPs) in eight m
6
A modification core genes and glioma risk. Case-control design and multinomial logistic regression were used to develop models to estimate the risk of glioma while accounting for the subtypes of glioma. A total of 171 glioma cases and 228 controls from South China were genotyped using a TaqMan assay. The
WTAP
rs7766006, YTHDF2 rs3738067, and FTO rs9939609 variants conferred a statistically significant increased risk of glioma, respectively.
YTHDC1
rs2293595, YTHDC1 rs3813832, and FTO rs8047395 were associated with a significant inverse association with risk of glioma, respectively. The significant associations were more predominant in stratification analyses of certain subgroups. Functional annotations revealed that
WTAP
rs7766006 and
YTHDF
2 rs3738067 could be potential functional variants by increasing expression of
WTAP
and
YTHDF2
mRNA, respectively. Overall, these findings implicate variants in the m
6
A modification core genes as playing a role in pediatric glioma etiology.
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Background: Hepatoblastoma is a commonly occurring embryonal tumors in children. N6-methyladenosine (m 6 A) plays a critical role in gene expression, thus contributing to the occurrence and progression of cancer. RNA splicing is regulated by the nuclear m 6 A reader YTHDC1, yet the roles of YTHDC1 polymorphisms in hepatoblastoma remain unclear. Methods: We conducted a seven-center case-control study to determine the association between YTHDC1 gene polymorphisms (rs2293596 T>C, rs2293595 T>C and rs3813832 T>C) and hepatoblastoma susceptibility. We recruited 313 hepatoblastoma patients and 1446 healthy controls. Results: There was no significant association between all of these polymorphisms and hepatoblastoma susceptibility in single locus or combined analysis. Stratification analysis revealed that rs2293596 TC/CC genotype carriers had a higher risk of developing hepatoblastoma in the subgroup of clinical stages III + IV [adjusted odds ratio (OR) = 1.80, 95% confidence interval (CI) = 1.18-2.76, p = 0.007]. In addition, 3 risk genotype carriers are more likely to develop hepatoblastoma in the subgroup of clinical stages III + IV (adjusted OR = 1.80, 95% CI = 1.18-2.76, p = 0.007). Furthermore, false-positive probability analysis was used to notarize our findings. Haplotype analysis indicated that there was no significant association between inferred haplotypes of YTHDC1 gene based on observed genotypes and hepatoblastoma risk. Conclusions: In conclusion, our findings suggest that the rs2293596 T>C polymorphism may contribute to hepatoblastoma susceptibly and YTHDC1 gene polymorphisms may have a cumulative effect on hepatoblastoma risk.
Hepatoblastoma is the most common malignant liver cancer in childhood. The etiology of hepatoblastoma remains obscure. Hepatoblastoma is closely related to genetic syndromes, hinting that hepatoblastoma is a genetic predisposition disease. However, no precise exposures or genetic events are reported to hepatoblastoma occurrence. During the past decade, significant advances have been made in the understanding of etiology leading to hepatoblastoma, and several important genetic events that appear to be important for the development and progression of this tumor have been identified. Advances in our understanding of the genetic changes that underlie hepatoblastoma may translate into better patient outcomes. Single nucleotide polymorphisms (SNPs) have been generally applied in the research of etiology’s exploration, disease treatment, and prognosis assessment. Here, we reviewed and discussed the molecular epidemiology, especially SNPs progresses in hepatoblastoma, to provide references for future studies and promote the study of hepatoblastoma’s etiology.
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