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. 2000 Jul-Aug;31(4):404-8.
doi: 10.1016/s0188-4409(00)00092-8.

Prevalence of acute intermittent porphyria in a Mexican psychiatric population

A Jara-Prado  1 , P Yescas, F J Sánchez, C Ríos, R Garnica, E Alonso
Affiliations

Prevalence of acute intermittent porphyria in a Mexican psychiatric population

A Jara-Prado et al. Arch Med Res. 2000 Jul-Aug.

Abstract

Background: Acute intermittent porphyria is a hereditary error of porphyrin metabolism in which the main metabolic defect is caused by a decrease in porphobilinogen deaminase activity. Previous work has demonstrated a higher prevalence of acute intermittent porphyria in the psychiatric patient population than in the general population. The goal of this study was evaluate 300 psychiatric patients and 150 control subjects to detect acute intermittent porphyria by measurement of porphobilinogen (PBG) deaminase activity in blood.

Methods: Screening for porphobilinogen deaminase activity was carried out by fluorometric measurement of porphyrins synthesized during 1 h in blood and the measurement of delta-aminolevulinic acid and porphobilinogen in urine.

Results: We found two psychiatric patients, one male and one female, with decreased porphobilinogen deaminase activity. When the families of these patients were studied, one brother was found to have an abnormality. Among controls, a woman was found to have the abnormality and her father was found to have typical features of the disease.

Conclusions: These results indicate a prevalence of porphyria in Mexican psychiatric patients similar to controls, and that measurement of PBG deaminase activity is a good tool for defining acute intermittent porphyria carriers.

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