Combined 677CC/1298AC genotypes of methylenetetrahydrofolate reductase (MTHFR ) reduce susceptibility to precursor B lymphoblastic leukemia in a Chinese population.
The methylenetetrahydrofolate reductase (MTHFR) encodes a major enzyme in folate metabolism. It has been suggested that two MTHFR polymorphisms, 677C>T and 1298A>C, influence risk of acute lymphoblastic leukemia (ALL). Most studies on relation of MTHFR polymorphisms to ALL susceptibility have been in pediatric populations because ALL is relatively rare in adults. Here, we report a case-control study of 127 Chinese patients with adult precursor B lymphoblastic leukemia (B-ALL) to examine correlation between the MTHFR polymorphisms and B-ALL susceptibility in adults. Our data show that although the prevalence of genotype 1298CC was significantly higher in the female patients than in the controls (P = 0.04), the differences in distributions of combined genotypes of 1298CC with either 677CC or 677CT between the cases and the controls were statistically insignificant. Haplotype analysis revealed no significant difference between the cases and the controls. The prevalence for joint MTHFR genotypes 677CC/1298AC was significantly lower in the female B-ALL cases than in the controls [odds ratio (OR) = 0.06, 95% CI = 0.00-0.53, P = 0.0033] and no differences among the men [OR = 0.71, 95% CI = 0.20-2.53, P = 0.55], suggesting that protective effects of combined MTHFR 677CC/1298AC genotypes on susceptibility of adult B-ALL are gender bias toward women with 677CC/1298AC women being at a 17-fold reduced odds to develop B-ALL.
Lv
Ling
L
Department of Rheumatology and Clinical Epidemiology, Huashan Hospital, Fudan University, Shanghai, China.
Wu
Cuie
C
Sun
Henjuan
H
Zhu
Saijuan
S
Yang
Yongchen
Y
Chen
Xi
X
Fu
Hua
H
Bao
Liming
L
D000328:Adult; D000368:Aged; D044466:Asian People / Q000235:genetics; D001483:Base Sequence; D016022:Case-Control Studies; D002681:China; D016001:Confidence Intervals; D017931:DNA Primers / Q000235:genetics; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D008297:Male; D042965:Methylenetetrahydrofolate Reductase (NADPH2) / Q000235:genetics*; D008875:Middle Aged; D016017:Odds Ratio; D020641:Polymorphism, Single Nucleotide; D015452:Precursor B-Cell Lymphoblastic Leukemia-Lymphoma / Q000201:enzymology* / Q000235:genetics*; D012727:Sex Characteristics
D017931:DNA Primers; D042965:Methylenetetrahydrofolate Reductase (NADPH2)