Association of ulcerative colitis with transcobalamin II gene polymorphisms and serum homocysteine, vitamin B12, and folate levels in Chinese patients

Immunogenetics
Shu-Zi ZhengYi Jiang

Abstract

It has been reported that abnormal elevation of homocysteine is quite prevalent in ulcerative colitis (UC) patients. We attempted to explore the relationship of UC with transcobalamin II (TCN2) gene polymorphisms and serum homocysteine, vitamin B12, and folate levels in Chinese patients. TCN2 (rs1801198, rs9606756) genotypes were detected by the improved multiple ligase detection reaction (iMLDR) technique in 527 UC patients and 574 controls. Moreover, 128 UC patients and 138 controls were randomly selected for the measurement of homocysteine, vitamin B12, and folate levels by enzymatic cycling assay or chemiluminescence immunoassay. For TCN2 (rs1801198), the frequency of allele G and combined frequencies of CG and GG genotypes were increased in patients with mild, moderate, and severe UC compared with those with remission UC (all P < 0.001). The average homocysteine level was elevated (10.78 ± 3.33 vs 9.91 ± 2.88 μmol/L, P = 0.024), whereas the average vitamin B12 and folate levels were reduced (408.66 ± 185.00 vs 457.42 ± 206.47 pg/mL, P = 0.044; 6.81 ± 3.06 vs 8.17 ± 2.58 ng/mL, P < 0.001, respectively) in UC patients than in controls. Compared with controls, the prevalence of hyperhomocysteinemia (HHcy >15.0 μmol/L), vitami...Continue Reading

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Methods Mentioned

BETA
PCR
electrophoresis
ESR

Software Mentioned

Haploview
GeneMapper
Random
SPSS

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