Summary
Succinic semialdehyde dehydrogenase (SSADH) deficiency, a rare genetic defect of GABA degradation recently modelled in mice (SSADH−/− mice), manifests early absence seizures that evolve into generalized convulsive seizures and lethal status epilepticus in gene-ablated mice. Disrupted GABA homeostasis, in conjunction with the epileptic phenotype and increased gamma-hydroxybutyric acid (GHB), suggested that expression profiling with the U74Av2 Affymetrix system would reveal dysregulation of receptor genes associated with GABAergic and glutamatergic neurotransmission. Unexpectedly, we found significant downregulation for genes associated with myelin biogenesis and compaction, predominantly in hippocampus and cortex. These results were confirmed by: (1) myelin basic protein (MBP) immunohistochemistry; (2) western blotting of myelin-associated glycoprotein (MAG) and MBP; (3) qRT-PCR analyses of myelin-associated oligodendrocytic basic protein (MOBP), MAG, MBP and proteolipid protein (PLP) in hippocampus, cortex and spinal cord; (4) quantitation of ethanolamine and choline plasmalogens, all core myelin components; (5) evaluation of myelin content in brain sections employing toluidine blue staining; and (6) ultrastructural evaluation of myelin sheath thickness via electron microscopy. We speculate that increased GABA/GHB, acting through GABAergic systems, results in decreased levels of the neurosteroids progesterone and allopregnanolone [Gupta et al (2003) Ann Neurol 54(Supplement 6): S81–S90] and phosphorylation of mitogen-activated protein (MAP) kinase, with resulting myelin protein abnormalities primarily in the cortex of SSADH−/− mice.
Similar content being viewed by others
References
Buzzi A, Wu Y, Perez-Velazquez J, et al (2003) Altered GABAB receptor (GABA B r) function and lethal status epilepticus in mice deficient for succinic semialdehyde dehydrogenase. Program No. 303.2. Abstract/Itinerary Planner. Washington DC: Society for Neuroscience.
Do-Rego JL, Mensah-Nyagan GA, Beaujean D, et al (2000) Gamma-aminobutyric acid, acting through gamma-aminobutyric acid type A receptors, inhibits the biosynthesis of neurosteroids in the frog hypothalamus. Proc Natl Acad Sci USA 97: 13925–13930.
Dugan LL, Demediuk P, Pendley CE, Horrocks LA (1986) Separation of phospholipids by high pressure liquid chromatography: all major classes including ethanolamine and choline plasmalogens, and most minor classes, including lysophosphatidylethanolamine. J Chromatogr 378: 317–327.
Dyer CA (2002) The structure and function of myelin: from inert membrane to perfusion pump. Neurochem Res 27:1279–1292.
Eng LF, Noble EP (1968) The maturation of rat brain myelin. Lipids 3: 157–162.
Ghoumari AM, Ibanez C, El-Etr M, et al (2003) Progesterone and its metabolites increase myelin basic protein expression in organotypic slice cultures of rat cerebellum. J Neurochem 86: 848–859.
Gibson KM, Jakobs C (2001) Disorders of beta- and gamma-amino acids in free and peptide-linked forms. In: Scriver CR, Beaudet AL, Sly WS, Valle D, eds; Childs B, Kinzler KW, Vogelstein B, assoc, eds. The Metabolic and Molecular Bases of Inherited Disease, 8th edn. New York: McGraw-Hill, 2079–2105.
Gibson KM, Schor DS, Gupta M, et al (2002) Focal neurometabolic alterations in mice deficient for succinate semialdehyde dehydrogenase. J Neurochem 81: 71–79.
Grant KA, Shannon EE, Porcu P, Purdy RH (2005) Characterization of the discriminative stimulus effects of the neuroactive steroid pregnanolone in DBA/2J and C57BL/6J inbred mice. J Pharmacol Exp Ther 314: 675–685.
Gupta M, Greven R, Jansen EEW, et al (2002) Therapeutic intervention in mice deficient for succinate semialdehyde dehydrogenase (gamma-hydroxybutyric aciduria). J Pharmacol Exp Ther 302: 180–187.
Gupta M, Hogema BM, Grompe M, et al (2003) Murine succinate semialdehyde dehydrogenase deficiency. Ann Neurol 54(Supplement 6): S81–S90.
Gupta M, Polinsky M, Senephansiri H, et al (2004) Seizure evolution and amino acid imbalances in murine succinate semialdehyde dehydrogenase (SSADH) deficiency. Neurobiol Dis 16: 556–562.
Hara A, Radin NS (1978) Lipid extraction of tissues with a low-toxicity solvent. Anal Biochem 90: 420–426.
Hayat MA (2000) Principles and Techniques of Electron Microscopy: Biological Applications, 4th edn. Cambridge: Cambridge University Press.
Hirashima Y, Farooqui AA, Mills JS, Horrocks LA (1992) Identification and purification of calcium-independent phospholipase A2 from bovine brain cytosol. J Neurochem 59: 708–714.
Hogema BM, Gupta M, Senephansiri H, et al (2001) Pharmacologic rescue of lethal seizures in mice deficient in succinate semialdehyde dehydrogenase. Nature Genetics 29: 212–216.
Horrocks LA (1967) Composition of myelin from peripheral and central nervous system of the squirrel monkey. J Lipid Res 8: 569–576.
Horrocks LA, Sun GY (1972) Ethanolamine plasmalogens. In: Rodnight R, Marks N, eds. Research Methods in Neurochemistry, Vol. I. New York: Plenum Press, 223–231.
Horrocks LA, Harder HW, Mozzi R, et al (1986a) Receptor mediated degradation of choline plasmalogen and glycerophospholipid methylation: a new hypothesis. In: Freysz L, Dreyfus H, Massarelli R, Gatt S, eds. Enzymes of Lipid Metabolism, Vol. 2. New York: Plenum Press, 707–711.
Horrocks LA, Yeo YK, Harder HW, Mozzi R, Goracci G (1986b) Choline plasmalogens, glycerophospholipid methylation, and receptor-mediated activation of adenylate cyclase. In: Greengard P, Robinson GA, eds. Advances in Cyclic Nucleotide Protein Phosphorylation Research, Vol 20. New York: Raven Press, 263–292.
Jensen K, Chiu C-S, Sokolova I, Lester HA, Mody I (2003) GABA transporter-1 (GAT-1)-deficient mice: differential tonic activation of GABA A versus GABA B receptors in the hippocampus. J Neurophysiol 90: 2690–2701.
Jolly CA, Hubbell T, Behnke WD, Schroeder F (1997) Fatty acid binding protein: stimulation of microsomal phosphatidic acid formation. Arch Biochem Biophys 341: 112–121.
Krasnova IN, McCoy MT, Ladenheim B, Cadet JL (2002) cDNA array analysis of gene expression profiles in the striata of wild-type and Cu/Zn superoxide dismutase transgenic mice treated with neurotoxic doses of amphetamine. FASEB J 16: 1379–1388.
Ledeen RW (1992) Enzymes and receptors of myelin. In: Martenson RE, ed. Myelin: Biology and Chemistry. Boca Raton, FL: CRC Press, 531–570.
Lewohl JM, Wang L, Miles MF, Zhang L, Dodd PR, Harris RA (2000) Gene expression in human alcoholism: microarray analysis of frontal cortex. Alcohol Clin Exper Res 24: 1873–1882.
Lewohl JM, Dodd PR, Mayfield RD, Harris RA (2001) Application of DNA microarrays to study human alcoholism. J Biomed Sci 8: 28–36.
Malaspina A, Kaushik N, de Belleroche J (2001) Differential expression of 14 genes in amyotrophic lateral sclerosis spinal cord detected using gridded cDNA arrays. J Neurochem 77: 132–145.
Marcheselli VL, Scott BL, Reddy TS, Bazan NG (1988) Quantitative analysis of acyl group composition of brain phospholipids, neutral lipids, and free fatty acids. In: Boulton AA, Baker GB, Horrocks LA, eds. Neuromethods 7. Lipids and Related Compounds. Clifton, NJ: Humana Press, 83–110.
Mariani L, McDonough WS, Hoelzinger DB, et al (2001) Identification and validation of P311 as a glioblastoma invasion gene using laser capture microdissection. Cancer Res 61(10): 4190–4196.
Massa PT, Wu C, Fecenko-Tacka K (2004) Dysmyelination and reduced myelin basic protein gene expression by oligodendrocytes of SHP-1-deficient mice. J Neurosci Res 77: 15–25.
Mayfield RD, Lewohl JM, Dodd PR, Herlihy A, Liu J, Harris RA (2002) Patterns of gene expression are altered in the frontal and motor cortices of human alcoholics. J Neurochem 81: 802–813.
Mikoshiba K, Aruga J, Ikenaka K, Okano H (1992) Shiverer and allelic mutant mild mice. In: Martenson RE, ed. Myelin: Biology and Chemistry. Boca Raon, FL: CRC Press, 723–744.
Morell P (1984) Myelin. New York: Plenum Press.
Murphy EJ, Stephens R, Jurkowitz-Alexander M, Horrocks LA (1993) Acidic hydrolysis of plasmalogens followed by high-performance liquid chromatography. Lipids 28: 565–568.
Panganamala RV, Horrocks LA, Geer JC, Cornwell DG (1971) Positions of double bonds in the monounsaturated alk-1-enyl groups form the plasmalogens of human heart and brain. Chem Phys Lipids 6: 97–102.
Pearl PL, Gibson KM, Acosta MT, et al (2003) Clinical spectrum of succinic semialdehyde dehydrogenase deficiency. Neurology 60: 1413–1417.
Pongrac J, Middleton FA, Lewis DA, Levitt P, Mirnics K (2002) Gene expression profiling with DNA microarrays: advancing our understanding of psychiatric disorders. Neurochem Res 27: 1049–1063.
Ren X, Mody I (2003) Gamma-hydroxybutyrate reduces mitogen-activated protein kinase phosphorylation via GABA B receptor activation in mouse frontal cortex and hippocampus. J Biol Chem 278: 42006–42011.
Rosenberger TA, Oki J, Purdon AD, Rapoport SI, Murphy EJ (2002) Rapid synthesis and turnover of brain microsomal ether phospholipids in the adult rat. J Lipid Res 43: 59–68.
Saito M, Smiley J, Toth R, Vadasz C (2002) Microarray analysis of gene expression in rat hippocampus after chronic ethanol treatment. Neurochem Res 27: 1221–1229.
Saunders RD, Horrocks LA (1984) Simultaneous extraction and preparation for HPLC of prostaglandins and phospholipids. Anal Biochem 143: 71–75.
Sun GY, Horrocks LA (1969) The alk-1-enyl and acyl group composition of the alk-1-enyl and the diacylglycerophosphoryl ethanolamines in mouse and ox brain. J Lipid Res 10: 153–157.
Vawter MP, Barrett T, Cheadle C, et al (2001) Application of cDNA microarrays to examine gene expression differences in schizophrenia. Brain Res Bull 55: 641–650.
Weindruch R, Prolla TA (2002) Gene expression profile of the aging brain. Arch Neurol 59: 1712–1714.
Author information
Authors and Affiliations
Corresponding author
Additional information
These authors contributed equally to this study.
Communicating editor: Verena Peters
Competing interests: None declared
Rights and permissions
About this article
Cite this article
Donarum, E.A., Stephan, D.A., Larkin, K. et al. Expression profiling reveals multiple myelin alterations in murine succinate semialdehyde dehydrogenase deficiency. J Inherit Metab Dis 29, 143–156 (2006). https://doi.org/10.1007/s10545-006-0247-6
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s10545-006-0247-6