Methylenetetrahydrofolate reductase mutations, a genetic cause for familial recurrent neural tube defects |
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Authors: | Yaliwal Laxmi V Desai Rathnamala M |
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Affiliation: | Department of Obstetrics and Gynaecology, SDM College of Medical Sciences and Hospital, Dharwad, Karnataka, India. |
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Abstract: | Methylenetetrahydrofolate reductase (MTHFR) gene mutations have been implicated as risk factors for neural tube defects (NTDs). The best-characterized MTHFR genetic mutation 677C→T is associated with a 2-4 fold increased risk of NTD if patient is homozygous for this mutation. This risk factor is modulated by folate levels in the body. A second mutation in the MTHFR gene is an A→C transition at position 1298. The 1298A→C mutation is also a risk factor for NTD, but with a smaller relative risk than 677C→T mutation. Under conditions of low folate intake or high folate requirements, such as pregnancy, this mutation could become of clinical importance. We present a case report with MTHFR genetic mutation, who presented with recurrent familial pregnancy losses due to anencephaly/NTDs. |
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Keywords: | Folate methylenetetrahydrofolate reductase gene mutation neural tube defects |
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