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J Neurol Neurosurg Psychiatry 53:1096-1098 doi:10.1136/jnnp.53.12.1096
  • Research Article

Cerebrospinal fluid S-adenosylmethionine in depression and dementia: effects of treatment with parenteral and oral S-adenosylmethionine.

  1. T Bottiglieri,
  2. P Godfrey,
  3. T Flynn,
  4. M W Carney,
  5. B K Toone,
  6. E H Reynolds
  1. Department of Neurology, King's College Hospital, London, United Kingdom.

      Abstract

      Cerebrospinal fluid (CSF) S-adenosylmethionine (SAM) levels were significantly lower in severely depressed patients than in a neurological control group. The administration of SAM either intravenously or orally is associated with a significant rise of CSF SAM, indicating that it crosses the blood-brain barrier in humans. These observations provide a rational basis for the antidepressant effect of SAM, which has been confirmed in several countries. CSF SAM levels were low in a group of patients with Alzheimer's dementia suggesting a possible disturbance of methylation in such patients and the need for trials of SAM treatment.

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