title: Metabolomic analysis reveals hepatic metabolite perturbations in citrin/mitochondrial glycerol-3-phosphate dehydrogenase double-knockout mice, a model of human citrin deficiency.
abstract: The citrin/mitochondrial glycerol-3-phosphate dehydrogenase (mGPD) double-knockout mouse displays phenotypic attributes of both neonatal intrahepatic cholestasis and adult-onset type II citrullinemia, making it a suitable model of human citrin deficiency. In the present study, we investigated metabolic disturbances in the livers of wild-type, citrin (Ctrn) knockout, mGPD knockout, and Ctrn/mGPD double-knockout mice following oral sucrose versus saline administration using metabolomic approaches. By using gas chromatography/mass spectrometry and capillary electrophoresis/mass spectrometry, we found three general groupings of metabolite changes in the livers of the double-knockout mice following sucrose administration that were subsequently confirmed using liquid chromatography/mass spectrometry or enzymatic methods: a marked increase of hepatic glycerol 3-phosphate, a generalized decrease of hepatic tricarboxylic acid cycle intermediates, and alterations of hepatic amino acid levels related to the urea cycle or lysine catabolism including marked increases in citrulline and lysine. Furthermore, concurrent oral administration of sodium pyruvate with sucrose ameliorated the hyperammonemia induced by sucrose, as had been shown previously, as well as almost completely normalizing the hepatic metabolite perturbations found. Overall, we have identified additional metabolic disturbances in double-KO mice following oral sucrose administration, and provided further evidence for the therapeutic use of sodium pyruvate in our mouse model of citrin deficiency.
authors: Institute for Health Sciences, Tokushima Bunri University, 180 Yamashiro-cho, Tokushima, Japan. takesah@kumamoto-u.ac.jp
authors: Takeyori
authors: T
authors: Saheki
authors: Kanako
authors: K
authors: Inoue
authors: Hiromi
authors: H
authors: Ono
authors: Anmi
authors: A
authors: Tushima
authors: Natsumi
authors: N
authors: Katsura
authors: Mana
authors: M
authors: Yokogawa
authors: Yukari
authors: Y
authors: Yoshidumi
authors: Tomiko
authors: T
authors: Kuhara
authors: Morimasa
authors: M
authors: Ohse
authors: Kazuhiro
authors: K
authors: Eto
authors: Takashi
authors: T
authors: Kadowaki
authors: David S
authors: DS
authors: Sinasac
authors: Keiko
authors: K
authors: Kobayashi
mesh_terms: D000641:Ammonia / Q000097:blood; D000818:Animals; D002135:Calcium-Binding Proteins / Q000172:deficiency* / Q000235:genetics / Q000378:metabolism; D002952:Citric Acid Cycle; D004195:Disease Models, Animal; D019075:Electrophoresis, Capillary; D008401:Gas Chromatography-Mass Spectrometry; D005993:Glycerolphosphate Dehydrogenase / Q000235:genetics* / Q000378:metabolism; D006019:Glycolysis; D006801:Humans; D008099:Liver / Q000187:drug effects / Q000378:metabolism*; D055442:Metabolome; D055432:Metabolomics; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008928:Mitochondria / Q000201:enzymology / Q000378:metabolism*; D027361:Organic Anion Transporters / Q000172:deficiency* / Q000235:genetics / Q000378:metabolism; D019289:Pyruvic Acid / Q000494:pharmacology; D013395:Sucrose / Q000008:administration & dosage; D014508:Urea / Q000378:metabolism
chemical_list: D002135:Calcium-Binding Proteins; D027361:Organic Anion Transporters; C008822:citrin; D013395:Sucrose; D000641:Ammonia; D019289:Pyruvic Acid; D014508:Urea; D005993:Glycerolphosphate Dehydrogenase