1
|
de Castro Fonseca M, Aguiar CJ, da Rocha Franco JA, Gingold RN, Leite MF. GPR91: expanding the frontiers of Krebs cycle intermediates. Cell Commun Signal 2016; 14:3. [PMID: 26759054 PMCID: PMC4709936 DOI: 10.1186/s12964-016-0126-1] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 01/04/2016] [Indexed: 12/19/2022] Open
Abstract
Since it was discovered, the citric acid cycle has been known to be central to cell metabolism and energy homeostasis. Mainly found in the mitochondrial matrix, some of the intermediates of the Krebs cycle are also present in the blood stream. Currently, there are several reports that indicate functional roles for Krebs intermediates out of its cycle. Succinate, for instance, acts as an extracellular ligand by binding to a G-protein coupled receptor, known as GPR91, expressed in kidney, liver, heart, retinal cells and possibly many other tissues, leading to a wide array of physiological and pathological effects. Through GPR91, succinate is involved in functions such as regulation of blood pressure, inhibition of lipolysis in white adipose tissue, development of retinal vascularization, cardiac hypertrophy and activation of stellate hepatic cells by ischemic hepatocytes. Along the current review, these new effects of succinate through GPR91 will be explored and discussed.
Collapse
Affiliation(s)
- Matheus de Castro Fonseca
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antonio Carlos 6627, Belo Horizonte, MG, CEP: 31270-901, Brazil.
| | - Carla J Aguiar
- Centro Universitário Estácio de Sá, Belo Horizonte, MG, Brazil.
| | - Joao Antônio da Rocha Franco
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antonio Carlos 6627, Belo Horizonte, MG, CEP: 31270-901, Brazil.
| | - Rafael N Gingold
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antonio Carlos 6627, Belo Horizonte, MG, CEP: 31270-901, Brazil.
| | - M Fatima Leite
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antonio Carlos 6627, Belo Horizonte, MG, CEP: 31270-901, Brazil.
| |
Collapse
|
2
|
Aguiar CJ, Rocha-Franco JA, Sousa PA, Santos AK, Ladeira M, Rocha-Resende C, Ladeira LO, Resende RR, Botoni FA, Barrouin Melo M, Lima CX, Carballido JM, Cunha TM, Menezes GB, Guatimosim S, Leite MF. Succinate causes pathological cardiomyocyte hypertrophy through GPR91 activation. Cell Commun Signal 2014; 12:78. [PMID: 25539979 PMCID: PMC4296677 DOI: 10.1186/s12964-014-0078-2] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Accepted: 11/28/2014] [Indexed: 12/28/2022] Open
Abstract
Background Succinate is an intermediate of the citric acid cycle as well as an extracellular circulating molecule, whose receptor, G protein-coupled receptor-91 (GPR91), was recently identified and characterized in several tissues, including heart. Because some pathological conditions such as ischemia increase succinate blood levels, we investigated the role of this metabolite during a heart ischemic event, using human and rodent models. Results We found that succinate causes cardiac hypertrophy in a GPR91 dependent manner. GPR91 activation triggers the phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2), the expression of calcium/calmodulin dependent protein kinase IIδ (CaMKIIδ) and the translocation of histone deacetylase 5 (HDAC5) into the cytoplasm, which are hypertrophic-signaling events. Furthermore, we found that serum levels of succinate are increased in patients with cardiac hypertrophy associated with acute and chronic ischemic diseases. Conclusions These results show for the first time that succinate plays an important role in cardiomyocyte hypertrophy through GPR91 activation, and extend our understanding of how ischemia can induce hypertrophic cardiomyopathy. Electronic supplementary material The online version of this article (doi:10.1186/s12964-014-0078-2) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Carla J Aguiar
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - João A Rocha-Franco
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - Pedro A Sousa
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - Anderson K Santos
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - Marina Ladeira
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - Cibele Rocha-Resende
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - Luiz O Ladeira
- Department of Physics, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - Rodrigo R Resende
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - Fernando A Botoni
- Department of Medicine, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - Marcos Barrouin Melo
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - Cristiano X Lima
- Department of Medicine, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - José M Carballido
- Novartis Institutes for Biomedical Research, Basel, CH-4002, Switzerland.
| | - Thiago M Cunha
- Department of Pharmacology, Ribeirão Preto, Medical School, University of São Paulo, São Paulo, Brazil.
| | - Gustavo B Menezes
- Department of Morphology, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - Silvia Guatimosim
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| | - M Fatima Leite
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG - CEP: 31270-901, Brazil.
| |
Collapse
|
3
|
Guerra MT, Fonseca EA, Melo FM, Andrade VA, Aguiar CJ, Andrade LM, Pinheiro ACN, Casteluber MF, Resende RR, Pinto MCX, Fernandes SOA, Cardoso VN, Souza–Fagundes EM, Menezes GB, de Paula AM, Nathanson MH, Leite MF. Mitochondrial calcium regulates rat liver regeneration through the modulation of apoptosis. Hepatology 2011; 54:296-306. [PMID: 21503946 PMCID: PMC3125477 DOI: 10.1002/hep.24367] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
UNLABELLED Subcellular Ca(2+) signals control a variety of responses in the liver. For example, mitochondrial Ca(2+) (Ca(mit)(2+)) regulates apoptosis, whereas Ca(2+) in the nucleus regulates cell proliferation. Because apoptosis and cell growth can be related, we investigated whether Ca(mit)(2+) also affects liver regeneration. The Ca(2+)-buffering protein parvalbumin, which was targeted to the mitochondrial matrix and fused to green fluorescent protein, was expressed in the SKHep1 liver cell line; the vector was called parvalbumin-mitochondrial targeting sequence-green fluorescent protein (PV-MITO-GFP). This construct properly localized to and effectively buffered Ca(2+) signals in the mitochondrial matrix. Additionally, the expression of PV-MITO-GFP reduced apoptosis induced by both intrinsic and extrinsic pathways. The reduction in cell death correlated with the increased expression of antiapoptotic genes [B cell lymphoma 2 (bcl-2), myeloid cell leukemia 1, and B cell lymphoma extra large] and with the decreased expression of proapoptotic genes [p53, B cell lymphoma 2-associated X protein (bax), apoptotic peptidase activating factor 1, and caspase-6]. PV-MITO-GFP was also expressed in hepatocytes in vivo with an adenoviral delivery system. Ca(mit)(2+) buffering in hepatocytes accelerated liver regeneration after partial hepatectomy, and this effect was associated with the increased expression of bcl-2 and the decreased expression of bax. CONCLUSION Together, these results reveal an essential role for Ca(mit)(2+) in hepatocyte proliferation and liver regeneration, which may be mediated by the regulation of apoptosis.
Collapse
Affiliation(s)
- Mateus T. Guerra
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Emerson A. Fonseca
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Flavia M. Melo
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - V. A Andrade
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Carla J. Aguiar
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Izabela Hendrix Metodist Institute
| | - Lídia M. Andrade
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, René Rachou Research Center, Oswaldo Cruz Foundation
| | - Ana Cristina N. Pinheiro
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Marisa F. Casteluber
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Rodrigo R. Resende
- Nanobiotechnology Laboratory, Federal University of São João del Rei, Brazil
| | - Mauro C. X. Pinto
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Simone O. A. Fernandes
- Radioisotope Laboratory, Department of Clinical and Toxicological Analysis – Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Valbert N. Cardoso
- Radioisotope Laboratory, Department of Clinical and Toxicological Analysis – Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Elaine M. Souza–Fagundes
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Gustavo B. Menezes
- Department of Morphology, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Ana M. de Paula
- Department of Physics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Michael H. Nathanson
- Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - M. Fatima Leite
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil, Howard Hughes Medical Institute
| |
Collapse
|
4
|
Arantes LM, Aguiar CJ, Amaya MJ, Guatimosim S, Leite MF. Nuclear Inositol 1,4,5-Triphosphate is an Absolut Requirement for Cardiomyocyte Hypertrophy. Biophys J 2011. [DOI: 10.1016/j.bpj.2010.12.3027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
5
|
Ladeira MS, Andrade VA, Gomes ERM, Aguiar CJ, Moraes ER, Soares JS, Silva EE, Lacerda RG, Ladeira LO, Jorio A, Lima P, Leite MF, Resende RR, Guatimosim S. Highly efficient siRNA delivery system into human and murine cells using single-wall carbon nanotubes. Nanotechnology 2010; 21:385101. [PMID: 20798464 DOI: 10.1088/0957-4484/21/38/385101] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Development of RNA interference (RNAi) technology utilizing short interfering RNA sequences (siRNA) has focused on creating methods for delivering siRNAs to cells and for enhancing siRNA stability in vitro and in vivo. Here, we describe a novel approach for siRNA cellular delivery using siRNA coiling into carboxyl-functionalized single-wall carbon nanotubes (SWCNTs). The CNT-siRNA delivery system successfully demonstrates nonspecific toxicity and transfection efficiency greater than 95%. This approach offers the potential for siRNA delivery into different types of cells, including hard-to-transfect cells, such as neuronal cells and cardiomyocytes. We also tested the CNT-siRNA system in a non-metastatic human hepatocellular carcinoma cell line (SKHep1). In all types of cells used in this work the CNT-siRNA delivery system showed high efficiency and apparent no side effects for various in vitro applications.
Collapse
Affiliation(s)
- M S Ladeira
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Aguiar CJ, Andrade VL, Gomes ERM, Alves MNM, Ladeira MS, Pinheiro ACN, Gomes DA, Almeida AP, Goes AM, Resende RR, Guatimosim S, Leite MF. Succinate modulates Ca(2+) transient and cardiomyocyte viability through PKA-dependent pathway. Cell Calcium 2009; 47:37-46. [PMID: 20018372 DOI: 10.1016/j.ceca.2009.11.003] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2009] [Revised: 10/26/2009] [Accepted: 11/04/2009] [Indexed: 10/20/2022]
Abstract
GPR91 is an orphan G-protein-coupled receptor (GPCR) that has been characterized as a receptor for succinate, a citric acid cycle intermediate, in several tissues. In the heart, the role of succinate is unknown. We now report that rat ventricular cardiomyocytes express GPR91. We found that succinate, through GPR91, increases the amplitude and the rate of decline of global Ca(2+) transient, by increasing the phosphorylation levels of ryanodine receptor and phospholamban, two well known Ca(2+) handling proteins. The effects of succinate on Ca(2+) transient were abolished by pre-treatment with adenylyl cyclase and cAMP-dependent protein kinase (PKA) inhibitors. Direct PKA activation by succinate was further confirmed using a FRET-based A-kinase activity reporter. Additionally, succinate decreases cardiomyocyte viability through a caspase-3 activation pathway, effect also prevented by PKA inhibition. Taken together, these observations show that succinate acts as a signaling molecule in cardiomyocytes, modulating global Ca(2+) transient and cell viability through a PKA-dependent pathway.
Collapse
Affiliation(s)
- Carla J Aguiar
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte CEP, Brazil
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Guatimosim S, Amaya MJ, Guerra MT, Aguiar CJ, Goes AM, Gómez-Viquez NL, Rodrigues MA, Gomes DA, Martins-Cruz J, Lederer WJ, Leite MF. Nuclear Ca2+ regulates cardiomyocyte function. Cell Calcium 2008; 44:230-42. [PMID: 18201761 DOI: 10.1016/j.ceca.2007.11.016] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2007] [Revised: 10/30/2007] [Accepted: 11/30/2007] [Indexed: 01/19/2023]
Abstract
In the heart, cytosolic Ca(2+) signals are well-characterized events that participate in the activation of cell contraction. In contrast, nuclear Ca(2+) contribution to cardiomyocyte function remains elusive. Here, we examined functional consequences of buffering nuclear Ca(2+) in neonatal cardiomyocytes. We report that cardiomyocytes contain a nucleoplasmic reticulum, which expresses both ryanodine receptor (RyR) and inositol 1,4,5-trisphosphate receptor (InsP(3)R), providing a possible way for active regulation of nuclear Ca(2+). Adenovirus constructs encoding the Ca(2+) buffer protein parvalbumin were targeted to the nucleus with a nuclear localization signal (Ad-PV-NLS) or to the cytoplasm with a nuclear exclusion signal (Ad-PV-NES). A decrease in the amplitude of global Ca(2+) transients and RyR-II expression, as well as an increase in cell beating rate were observed in Ad-PV-NES and Ad-PV-NLS cells. When nuclear Ca(2+) buffering was imposed nuclear enlargement, increased calcineurin expression, NFAT translocation to the nucleus and subcellular redistribution of atrial natriuretic peptide were observed. Furthermore, prolongation of action potential duration occurred in adult ventricular myocytes. These results suggest that nuclear Ca(2+) levels underlie the regulation of specific protein targets and thereby modulate cardiomyocyte function. The local nuclear Ca(2+) signaling and the structures that control it constitute a novel regulatory motif in the heart.
Collapse
Affiliation(s)
- Silvia Guatimosim
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte CEP: 31270-901, Brazil
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|