Life-threatening methylenetetrahydrofolate reductase (MTHFR) deficiency with extremely early onset: characterization of two novel mutations in compound heterozygous patients.

Abstract excerpt

Methylenetetrahydrofolate reductase (MTHFR) is a key enzymatic component of the folate cycle, converting 5,10-methylenetetrahydrofolate into 5-methyltetrahydrofolate, the methyl donor for remethylation of homocysteine into methionine. Severe MTHFR deficiency is a rare recessive disease leading to major hyperhomocysteinemia, homocystinuria, and progressive neurological distress within the two first decades of...

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