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Updated: Aug 8, 2026

Genetic Analysis of Hereditary Transthyretin Ala97Ser Related Amyloidosis
Published on: June 9, 2018
Diagnosis and treatment of 6-pyruvoyl-tetrahydropterin synthase deficiency
H Shintaku1, M Asada, Y Sawada
1Department of Pediatrics, Osaka City University Graduate School of Medicine, 1-4-3, Asahimachi, Abeno-ku, 545-8585, Osaka, Japan. shintakuh@med.osaka-cu.ac.jp
Abstract:
We detected a case of 6-pyruvoyl tetrahydropterin synthase (PTPS) deficiency during a neonatal mass screening and considered the differentiation and treatment of the peripheral form of PTPS deficiency. Although single treatment of BH4 had been started, because of the lowered biopterin (B) value, elevated neopterin (N) value, and N/B ratio in the cerebrospinal fluid (CSF), the peripheral form was judged negative and combined treatment with L-dopa and 5-hydroxy tryptophan (5-HTP) was started. Follow-up study will be necessary to confirm the diagnosis of PTPS deficiency.
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