Hyperhomocysteinemia, low folate status, homozygous C677T mutation of the methylene tetrahydrofolate reductase and renal arterial thrombosis

Clin Nephrol. 2002 Feb;57(2):158-62. doi: 10.5414/cnp57158.

Abstract

We report a renal artery thrombosis in a 42-year-old man. Fasting homocysteinemia was at 23 micromol/l 3 months later and at 33 pmol/l 5 months after the vascular event. A homozygous C677T MTHFR was found with low folate status. Active smoking may also have contributed to the pathogenesis of renal arterial thrombosis. The other causes of thrombophilia were ruled out. Homocysteine lowering treament was started: homocysteine normalized at 10.6 micromol/l. There was no recurrence of vascular event within 18 months. We propose mild or moderate hyperhomocysteinemia triggered by low folate status in patients with homozygous C677T MTHFR as a cause of renal arterial thrombosis.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Folic Acid / blood*
  • Homozygote
  • Humans
  • Hyperhomocysteinemia / complications*
  • Hyperhomocysteinemia / metabolism
  • Male
  • Methylenetetrahydrofolate Reductase (NADPH2)
  • Oxidoreductases Acting on CH-NH Group Donors / genetics*
  • Point Mutation*
  • Renal Artery Obstruction / complications*
  • Renal Artery Obstruction / metabolism
  • Thrombosis / complications*
  • Thrombosis / metabolism

Substances

  • Folic Acid
  • Oxidoreductases Acting on CH-NH Group Donors
  • Methylenetetrahydrofolate Reductase (NADPH2)