Abstract:
:Methionine synthase and methylmalonyl-CoA mutase (mutase) are the only two known vitamin B(12) (B(12)) dependent enzymes in humans. A lower level of B(12) has been shown to be an independent maternal risk factor for neural tube defects (NTDs) prompting an investigation of common genetic variants within B(12) dependent enzymes. To investigate the role of methylmalonyl-CoA mutase variants we studied 279 complete NTD triads (NTD affected case and both parents) and 256 controls. Based on case-control and family based (transmission disequilibrium test) analyses we did not find an association between the mutase single nucleotide polymorphisms (SNPs) K212K (636A-->G), H532R (1595A-->G) and V671I (2011G-->A) and NTDs. However, there was a significant difference in the frequencies of these polymorphisms between a group of African Americans and American Caucasians (K212K, P=0.002; H532R, P=0.001; V671I, P=0.006). In conclusion, common variants in the mutase gene do not appear to be risk factors for NTDs but their allele frequencies are significantly different between ethnic groups.
journal_name
Mol Genet Metabjournal_title
Molecular genetics and metabolismauthors
Parle-McDermott A,McManus EJ,Mills JL,O'Leary VB,Pangilinan F,Cox C,Weiler A,Molloy AM,Conley M,Watson D,Scott JM,Brody LC,Kirke PN,Birth Defects Research Group.doi
10.1016/j.ymgme.2003.09.009subject
Has Abstractpub_date
2003-12-01 00:00:00pages
463-8issue
4eissn
1096-7192issn
1096-7206pii
S1096719203002075journal_volume
80pub_type
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