Aging and CSF hydroxylase cofactor

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Abstract
The level of cerebrospinal fluid (CSF) hydroxylase cofactor activity was measured in 34 neurologically normal patients and analyzed according to age. Levels declined by approximately one-third over a 40-year span, probably reflecting loss of aminergic neurons. Fourteen patients with Parkinson disease all tended to have lower values than age-matched controls. Among Parkinson patients with the same order of disability, younger cases had higher CSF concentrations of hydroxylase cofactor than older patients.

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