4-Hydroxybutyric Aciduria/Succinic Semialdehyde Dehydrogenase Deficiency


4-Hydroelectric acid/ succinic semialdehyde deydrogenase deficiency (SSADH; Gamma-hydroxybutyric acidemia) inhibits the formation of succinate from GABA. This deficiency results in urinary excretion of 4-hydroxybutyric acid. In vivo proton MR also indicates elevated GABA levels as compared with an age-matched control. Symptoms include ataxia, chorea or athetosis, motor retardation, seizures, macrocephaly and delayed or abnormal speech development.

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References

  1. OMIM: Entry 271980
  2. Uniprot: P51649
  3. Engelke, U., van der Graaf, M., Heerschap, A., Hoenderop, S., Moolenaar, S., Morava, E., Wevers, R. (2007). Handbook of 1H-NMR spectroscopy in inborn errors of metabolism: body fluid NMR spectroscopy and in vivo MR spectroscopy (pp 118) (2nd ed). Heilbronn: SPS Verlagsgesellschaft
  4. Akaboshi S, Hogema BM, Novelletto A, Malaspina P, Salomons GS, Maropoulos GD, Jakobs C, Grompe M, Gibson KM: Mutational spectrum of the succinate semialdehyde dehydrogenase (ALDH5A1) gene and functional analysis of 27 novel disease-causing mutations in patients with SSADH deficiency. Hum Mutat. 2003 Dec;22(6):442-50. Pubmed
  5. Blasi P, Palmerio F, Caldarola S, Rizzo C, Carrozzo R, Gibson KM, Novelletto A, Deodato F, Cappa M, Dioni-Vici C, Malaspina P: Succinic semialdehyde dehydrogenase deficiency: clinical, biochemical and molecular characterization of a new patient with severe phenotype and a novel mutation. Clin Genet. 2006 Mar;69(3):294-6. Pubmed
  6. Gibson KM, Christensen E, Jakobs C, Fowler B, Clarke MA, Hammersen G, Raab K, Kobori J, Moosa A, Vollmer B, Rossier E, Iafolla AK, Matern D, Brouwer OF, Finkelstein J, Aksu F, Weber HP, Bakkeren JA, Gabreels FJ, Bluestone D, Barron TF, Beauvais P, Rabier D, Santos C, Lehnert W, et al.: The clinical phenotype of succinic semialdehyde dehydrogenase deficiency (4-hydroxybutyric aciduria): case reports of 23 new patients. Pediatrics. 1997 Apr;99(4):567-74. Pubmed
  7. Gibson KM, Hoffmann GF, Hodson AK, Bottiglieri T, Jakobs C: 4-Hydroxybutyric acid and the clinical phenotype of succinic semialdehyde dehydrogenase deficiency, an inborn error of GABA metabolism. Neuropediatrics. 1998 Feb;29(1):14-22. Pubmed