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Schein V, Kucharski LC, Guerreiro PMG, Martins TL, Morgado I, Power DM, Canario AVM, da Silva RSM. Stanniocalcin 1 effects on the renal gluconeogenesis pathway in rat and fish. Mol Cell Endocrinol 2015; 414:1-8. [PMID: 26187698 DOI: 10.1016/j.mce.2015.07.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 07/03/2015] [Accepted: 07/10/2015] [Indexed: 11/16/2022]
Abstract
The mammalian kidney contributes significantly to glucose homeostasis through gluconeogenesis. Considering that stanniocalcin 1 (STC1) regulates ATP production, is synthesized and acts in different cell types of the nephron, the present study hypothesized that STC1 may be implicated in the regulation of gluconeogenesis in the vertebrate kidney. Human STC1 strongly reduced gluconeogenesis from (14)C-glutamine in rat renal medulla (MD) slices but not in renal cortex (CX), nor from (14)C-lactic acid. Total PEPCK activity was markedly reduced by hSTC1 in MD but not in CX. Pck2 (mitochondrial PEPCK isoform) was down-regulated by hSTC1 in MD but not in CX. In fish (Dicentrarchus labrax) kidney slices, both STC1-A and -B isoforms decreased gluconeogenesis from (14)C-acid lactic, while STC1-A increased gluconeogenesis from (14)C-glutamine. Overall, our results demonstrate a role for STC1 in the control of glucose synthesis via renal gluconeogenesis in mammals and suggest that it may have a similar role in teleost fishes.
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Affiliation(s)
- Vanessa Schein
- Pos-Graduate Program in Biological Sciences, Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil; Pos-Graduate Program in Health Sciences, Department of Obstetrics and Gynecology, School of Medicine, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2400, 90035-003, Porto Alegre, RS, Brazil; CCMAR - Centre for Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139, Faro, Portugal.
| | - Luiz C Kucharski
- Pos-Graduate Program in Biological Sciences, Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Pedro M G Guerreiro
- CCMAR - Centre for Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139, Faro, Portugal
| | - Tiago Leal Martins
- Pos-Graduate Program in Biological Sciences, Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Isabel Morgado
- CCMAR - Centre for Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139, Faro, Portugal
| | - Deborah M Power
- CCMAR - Centre for Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139, Faro, Portugal
| | - Adelino V M Canario
- CCMAR - Centre for Marine Sciences, University of Algarve, Campus de Gambelas, 8005-139, Faro, Portugal
| | - Roselis S M da Silva
- Pos-Graduate Program in Biological Sciences, Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
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Mitochondrial proteomes of porcine kidney cortex and medulla: foundation for translational proteomics. Clin Exp Nephrol 2015; 20:39-49. [PMID: 26072732 DOI: 10.1007/s10157-015-1135-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 06/02/2015] [Indexed: 12/15/2022]
Abstract
BACKGROUND Emerging evidence has linked mitochondrial dysfunction to the pathogenesis of many renal disorders, including acute kidney injury, sepsis and even chronic kidney disease. Proteomics is a powerful tool in elucidating the role of mitochondria in renal pathologies. Since the pig is increasingly recognized as a major mammalian model for translational research, the lack of physiological proteome data of large mammals prompted us to examine renal mitochondrial proteome in porcine kidney cortex and medulla METHODS Kidneys were obtained from six healthy pigs. Mitochondria from cortex and medulla were isolated using differential centrifugation and proteome maps of cortical and medullar mitochondria were constructed using two-dimensional gel electrophoresis (2DE). Protein spots with significant difference between mitochondrial fraction of renal cortex and medulla were identified by mass spectrometry. RESULTS Proteomic analysis identified 81 protein spots. Of these spots, 41 mitochondrial proteins were statistically different between renal cortex and medulla (p < 0.05). Protein spots containing enzymes of beta oxidation, amino acid metabolism, and gluconeogenesis were predominant in kidney cortex mitochondria. Spots containing tricarboxylic acid cycle enzymes and electron transport system proteins, proteins maintaining metabolite transport and mitochondrial translation were more abundant in medullar mitochondria. CONCLUSION This study provides the first proteomic profile of porcine kidney cortex and medullar mitochondrial proteome. Different protein expression pattern reflects divergent functional metabolic role of mitochondria in various kidney compartments. Our study could serve as a useful reference for further porcine experiments investigating renal mitochondrial physiology under various pathological states.
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Huang J, Tang X, Ruan J, Ma H, Zou S. Use of Comparative Proteomics to Identify Key Proteins Related to Hepatic Lipid Metabolism in Broiler Chickens: Evidence Accounting for Differential Fat Deposition Between Strains. Lipids 2009; 45:81-9. [DOI: 10.1007/s11745-009-3373-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Accepted: 10/28/2009] [Indexed: 01/10/2023]
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Caton PW, Nayuni NK, Murch O, Corder R. Endotoxin induced hyperlactatemia and hypoglycemia is linked to decreased mitochondrial phosphoenolpyruvate carboxykinase. Life Sci 2009; 84:738-44. [DOI: 10.1016/j.lfs.2009.02.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2008] [Revised: 02/18/2009] [Accepted: 02/24/2009] [Indexed: 11/28/2022]
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Agca C, Greenfield RB, Hartwell JR, Donkin SS. Cloning and characterization of bovine cytosolic and mitochondrial PEPCK during transition to lactation. Physiol Genomics 2002; 11:53-63. [PMID: 12388798 DOI: 10.1152/physiolgenomics.00108.2001] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The cytosolic (C) and mitochondrial (M) forms of phosphoenolpyruvate carboxykinase (PEPCK; EC 4.1.1.32) are encoded by two different nuclear genes in mouse, human, and chicken. Our objective was to clone the two forms of PEPCK for bovine and determine their expression during the immediate periparturient interval in dairy cows. Bovine PEPCK-C cDNA contains 2,592 nucleotides and contains 84% similarity to the coding sequence of human PEPCK-C cDNA. A 449-nt partial clone of the 3' end of PEPCK-M is 76% similar to the corresponding sequence of human PEPCK-M. The coding sequence of bovine PEPCK-C and coding sequence of the partial PEPCK-M clone were 58% similar but the similarities in the 3'-untranslated regions were negligible. Northern blot analysis revealed single transcripts of 2.85 and 2.35 kb for PEPCK-C and PEPCK-M, respectively. The transition to lactation did not alter PEPCK-M transcript expression, but expression of PEPCK-C mRNA was transiently increased during early lactation, indicating that enhanced hepatic gluconeogenesis during this period may be tied to enhanced capacity for cytosolic rather than mitochondrial formation of phosphoenolpyruvate.
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Affiliation(s)
- Cansu Agca
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47906, USA
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Anderwald C, Müller G, Koca G, Fürnsinn C, Waldhäusl W, Roden M. Short-term leptin-dependent inhibition of hepatic gluconeogenesis is mediated by insulin receptor substrate-2. Mol Endocrinol 2002; 16:1612-28. [PMID: 12089355 DOI: 10.1210/mend.16.7.0867] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Leptin has both insulin-like and insulin-antagonistic effects on glucose metabolism. To test whether leptin interferes directly with insulin signaling, we perfused isolated rat livers with leptin (0.1, 0.5, 5, and 25 nmol/liter), leptin + insulin (5 nmol/liter + 10 nmol/liter), insulin (10 nmol/liter), or vehicle (control). Leptin reduced L-lactate-(10 mmol/liter)-stimulated glucose production by 39-66% (P < 0.006 vs. control) and phosphoenolpyruvate carboxykinase (PEPCK) activity by 22-52% (P < 0.001). Physiological leptin concentrations (0.1-5 nmol/liter) stimulated the tyrosine phosphorylation (pY) of insulin receptor substrate-2 (IRS-2) (280-954%; P < 0.05) and its associated phosphatidylinositol-3 kinase activity (122-621%; P < 0.003). Leptin (0.5-25 nmol/liter) inhibited IRS-1 pY and its associated phosphatidylinositol-3 kinase activity (20-89%; P < 0.03) but stimulated janus kinase-2 pY (272-342%; P < 0.001). Leptin also down-regulated its short receptor isoform in a time- and concentration-dependent manner (28-54%; P < 0.05). Exposure to leptin + insulin additively reduced glucose production and PEPCK activity (approximately 50%; P < 0.001 vs. control) and doubled IRS-2 pY (P < 0.01 vs. insulin). However, leptin + insulin decreased IRS-1 pY by 57% (P < 0.01 vs. insulin). Insulin alone (P < 0.01), but not leptin, increased autophosphorylation of nonreceptor tyrosine kinases (pp59(Lyn) + pp125(Fak)). In conclusion, leptin both alone and in combination with insulin reduces hepatic glucose production by decreasing the synthesis of the key enzyme of gluconeogenesis, PEPCK, which results mainly from the stimulation of the IRS-2 pathway.
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Affiliation(s)
- Christian Anderwald
- Division of Endocrinology and Metabolism, Department of Internal Medicine III, University of Vienna, Austria A-1090
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