Abstract
Free thiamin and thiamin monophosphate have been found in the cerebrospinal fluid, plasma and in erythrocytes of patients suffering from ataxia of different origins. In erythrocytes, thiamin pyrophosphate was also measured. In a limited number of cases, uptake of 14C-thiamin by erythrocytes was found as well. Controls were hospitalized patients affected by chronic neurological diseases without any clinical sign of thiamin deficiency. The results showed a significant decrease in thiamin and thiamin monophosphate in the cerebrospinal fluid and in the plasma of ataxic subjects, in comparison to controls. In erythrocytes, only thiamin pyrophosphate levels had decreased. The uptake of 14C-thiamin by erythrocytes was similar in both ataxic and control groups. These results were comparable to those observed in thiamin-deficient individuals, like alcoholic patients, and prompted further investigation into thiamin metabolism in these diseases.
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