Document Type : Research Articles
Authors
1
Department of Biochemistry, AIIMS, New Delhi, India.
2
Department of Biochemistry, MAMC, New Delhi, India.
3
Department of Biochemistry, Lady Harding Medical College, New Delhi, India.
4
Department of Gastroenterology and Nutrition Medicine, AIIMS, New Delhi, India.
5
Department of Pulmonary Medicine, AIIMS, Jodhpur, India.
6
Department of Biostatistics, AIIMS, India.
7
Department of Neurosurgery, AIIMS, New Delhi, India.
8
Department of Cardiac Biochemistry, AIIMS, New Delhi, India.
9
Department of Pathology, AIIMS, New Delhi, India.
Abstract
Background: The association of primary brain tumors with Single Nucleotide polymorphisms (SNPs) in genes of
folate metabolising enzymes have been reported to vary among different ethnic population. Here, we have studied the
association of SNPs of folate metabolizing genes with the primary brain tumors (glioma and meningioma) in North Indian
population. Methods: SNPs of genes coding for folate metabolizing enzymes was carried out in 288 study population
from North India [Glioma (n=108), Meningioma (n=76) and healthy-control (n=104)]. The allele-specific polymerase
chain reaction (ARMS-PCR) was used to analyse the SNP A1298C of the MTHFR (Methylenetetrahydrofolate-reductase)
and the SNP A66G of the methionine synthase reductase (MTRR) genes. The PCR-RLFP (Restriction Fragment Length
Polymorphism) was used to analyse the SNP C677T of the Methylene tetrahydrofolate-reductase and the SNP A2756G
of the methionine-synthase (MTR) genes. Serum homocysteine, vitamin B12 and folate levels were evaluated in controls/
patients serum using Chemiluminescence immunoassay and the levels were correlated with SNPs genotype. Results:
The CC genotype of MTHFR A1298C was observed to have reduced risk of having meningioma than AA genotype
(odd ratio=0.62, 95%CI 0.32-0.97, p=0.03). Similarly, the AG genotype of MTRR A66G showed reduced risk of
glioma than AA genotype (odd ratio=0.56, 95%CI 0.32-0.97, p=0.039). Furthermore, in patients with AA genotype of
MTR A2756G and CT genotype of MTHFR C677T showed higher serum homocysteine level than GG genotype (8.6
μmol/L, p=0.048) and CC genotype (11.2μmol/L, p=0.039) respectively. Conclusion: Our findings provide an insight
into the risk association of SNPs in MTHFR A1298C and MTRR A66G genes with glioma/meningioma patients.
Further studies are needed to evaluate their clinical implications.
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