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Jardin I, Alvarado S, Jimenez-Velarde V, Nieto-Felipe J, Lopez JJ, Salido GM, Smani T, Rosado JA. Orai1α and Orai1β support calcium entry and mammosphere formation in breast cancer stem cells. Sci Rep 2023; 13:19471. [PMID: 37945647 PMCID: PMC10636192 DOI: 10.1038/s41598-023-46946-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 11/07/2023] [Indexed: 11/12/2023] Open
Abstract
Orai1 is the pore-forming subunit of the Ca2+-release activated Ca2+ channels that mediate store-operated Ca2+ entry (SOCE) in excitable and non-excitable cells. Two Orai1 forms have been identified in mammalian cells, the full-length variant Orai1α, and the short form Orai1β, lacking the N-terminal 63 amino acids. Stem cells were isolated from non-tumoral breast epithelial cells of the MCF10A cell line, and the most representative ER+ , HER2 or triple negative breast cancer cell lines MCF7, SKBR3 and MDA-MB-231, respectively. Orai and TRPC family members expression was detected by RT-PCR and Western blotting. Changes in cytosolic Ca2+ concentration were analyzed by confocal microscopy using Fluo 4 and the spheroid-forming ability and self-renewal was estimated in culture plates coated with pHEMA using a cell imaging system. Here, we have characterized the expression of Orai family members and several TRPC channels at the transcript level in breast stem cells (BSC) derived from the non-tumoral breast epithelial cell line MCF10A and breast cancer stem cells (BCSC) derived from the well-known estrogen receptor positive (ER+), HER2 and triple negative cell lines MCF7, SKBR3 and MDA-MB-231, respectively. Furthermore, we have evaluated the mammosphere formation efficiency and self-renewal of the BSC and BCSC. Next, through a combination of Orai1 knockdown by iRNA and the use of MDA-MB-231 KO cells, missing the native Orai1, transfected with plasmids encoding for either Orai1α or Orai1β, we show that Orai1 is essential for mammosphere formation and self-renewal efficiency in BCSC derived from triple negative and HER2 subtypes cell cultures, while this channel has a negligible effect in BCSC derived from ER+ cells as well as in non-tumoral BSC. Both, Orai1α, and Orai1β support SOCE in MDA-MB-231-derived BCSC with similar efficiency, as well as COX activation and mammosphere formation. These findings provide evidence of the functional role of Orai1α and Orai1β in spheroid forming efficiency and self-renewal in breast cancer stem cells.
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Affiliation(s)
- Isaac Jardin
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), Universidad de Extremadura, 10003, Caceres, Spain.
| | - Sandra Alvarado
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), Universidad de Extremadura, 10003, Caceres, Spain
| | - Vanesa Jimenez-Velarde
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), Universidad de Extremadura, 10003, Caceres, Spain
| | - Joel Nieto-Felipe
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), Universidad de Extremadura, 10003, Caceres, Spain
| | - Jose J Lopez
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), Universidad de Extremadura, 10003, Caceres, Spain
| | - Gines M Salido
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), Universidad de Extremadura, 10003, Caceres, Spain
| | - Tarik Smani
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Seville, Spain
- Departamento de Fisiologia Medica y Biofisica, Facultad de Medicina, Universidad de Sevilla, Seville, Spain
| | - Juan A Rosado
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), Universidad de Extremadura, 10003, Caceres, Spain.
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Jardin I, Alvarado S, Sanchez-Collado J, Nieto-Felipe J, Lopez JJ, Salido GM, Rosado JA. Functional differences in agonist-induced plasma membrane expression of Orai1α and Orai1β. J Cell Physiol 2023; 238:2050-2062. [PMID: 37332264 DOI: 10.1002/jcp.31055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/20/2023] [Accepted: 05/24/2023] [Indexed: 06/20/2023]
Abstract
Orai1 is the pore-forming subunit of the store-operated Ca2+ release-activated Ca2+ (CRAC) channels involved in a variety of cellular functions. Two Orai1 variants have been identified, the long form, Orai1α, containing 301 amino acids, and the short form, Orai1β, which arises from alternative translation initiation from methionines 64 or 71, in Orai1α. Orai1 is mostly expressed in the plasma membrane, but a subset of Orai1 is located in intracellular compartments. Here we show that Ca2+ store depletion leads to trafficking and insertion of compartmentalized Orai1α in the plasma membrane via a mechanism that is independent on changes in cytosolic free-Ca2+ concentration, as demonstrated by cell loading with the fast intracellular Ca2+ chelator dimethyl BAPTA in the absence of extracellular Ca2+ . Interestingly, thapsigargin (TG) was found to be unable to induce translocation of Orai1β to the plasma membrane when expressed individually; by contrast, when Orai1β is co-expressed with Orai1α, cell treatment with TG induced rapid trafficking and insertion of compartmentalized Orai1β in the plasma membrane. Translocation of Orai1 forms to the plasma membrane was found to require the integrity of the actin cytoskeleton. Finally, expression of a dominant negative mutant of the small GTPase ARF6, and ARF6-T27N, abolished the translocation of compartmentalized Orai1 variants to the plasma membrane upon store depletion. These findings provide new insights into the mechanism that regulate the plasma membrane abundance of Orai1 variants after Ca2+ store depletion.
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Affiliation(s)
- Isaac Jardin
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain
| | - Sandra Alvarado
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain
| | - Jose Sanchez-Collado
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain
| | - Joel Nieto-Felipe
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain
| | - Jose J Lopez
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain
| | - Gines M Salido
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain
| | - Juan A Rosado
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain
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Nieto-Felipe J, Macias-Diaz A, Sanchez-Collado J, Berna-Erro A, Jardin I, Salido GM, Lopez JJ, Rosado JA. Role of Orai-family channels in the activation and regulation of transcriptional activity. J Cell Physiol 2023; 238:714-726. [PMID: 36952615 DOI: 10.1002/jcp.30971] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/12/2023] [Accepted: 01/27/2023] [Indexed: 03/25/2023]
Abstract
Store operated Ca2+ entry (SOCE) is a cornerstone for the maintenance of intracellular Ca2+ homeostasis and the regulation of a variety of cellular functions. SOCE is mediated by STIM and Orai proteins following the activation of inositol 1,4,5-trisphosphate receptors. Then, a reduction of the endoplasmic reticulum intraluminal Ca2+ concentration is sensed by STIM proteins, which undergo a conformational change and activate plasma membrane Ca2+ channels comprised by Orai proteins. STIM1/Orai-mediated Ca2+ signals are finely regulated and modulate the activity of different transcription factors, including certain isoforms of the nuclear factor of activated T-cells, the cAMP-response element binding protein, the nuclear factor κ-light chain-enhancer of activated B cells, c-fos, and c-myc. These transcription factors associate SOCE with a plethora of signaling events and cellular functions. Here we provide an overview of the current knowledge about the role of Orai channels in the regulation of transcription factors through Ca2+ -dependent signaling pathways.
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Affiliation(s)
- Joel Nieto-Felipe
- Departamento de Fisiología, Instituto Universitario de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Caceres, Spain
| | - Alvaro Macias-Diaz
- Departamento de Fisiología, Instituto Universitario de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Caceres, Spain
| | - Jose Sanchez-Collado
- Departamento de Fisiología, Instituto Universitario de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Caceres, Spain
| | - Alejandro Berna-Erro
- Departamento de Fisiología, Instituto Universitario de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Caceres, Spain
| | - Isaac Jardin
- Departamento de Fisiología, Instituto Universitario de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Caceres, Spain
| | - Gines M Salido
- Departamento de Fisiología, Instituto Universitario de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Caceres, Spain
| | - Jose J Lopez
- Departamento de Fisiología, Instituto Universitario de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Caceres, Spain
| | - Juan A Rosado
- Departamento de Fisiología, Instituto Universitario de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Caceres, Spain
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Sanchez-Collado J, Lopez JJ, Cantonero C, Jardin I, Regodón S, Redondo PC, Gordillo J, Smani T, Salido GM, Rosado JA. Correction: Sanchez-Collado et al. Orai2 Modulates Store-Operated Ca 2+ Entry and Cell Cycle Progression in Breast Cancer Cells. Cancers 2021, 14, 114. Cancers (Basel) 2023; 15:cancers15041290. [PMID: 36831699 PMCID: PMC9954770 DOI: 10.3390/cancers15041290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 11/03/2022] [Indexed: 02/22/2023] Open
Abstract
In the original publication [...].
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Affiliation(s)
- Jose Sanchez-Collado
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003 Caceres, Spain
| | - Jose J. Lopez
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003 Caceres, Spain
| | - Carlos Cantonero
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003 Caceres, Spain
| | - Isaac Jardin
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003 Caceres, Spain
| | - Sergio Regodón
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003 Caceres, Spain
| | - Pedro C. Redondo
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003 Caceres, Spain
| | - Juan Gordillo
- Pathology Service, Hospital de Merida, 06800 Merida, Spain
| | - Tarik Smani
- Department of Medical Physiology and Biophysics, University of Seville, 41004 Seville, Spain
- Group of Cardiovascular Pathophysiology, Institute of Biomedicine of Seville, University Hospital of Virgen del Rocio, University of Seville, CSIC, 41004 Seville, Spain
| | - Gines M. Salido
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003 Caceres, Spain
| | - Juan A. Rosado
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003 Caceres, Spain
- Correspondence:
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Estaras M, Ortiz-Placin C, Castillejo-Rufo A, Fernandez-Bermejo M, Blanco G, Mateos JM, Vara D, Gonzalez-Cordero PL, Chamizo S, Lopez D, Rojas A, Jaen I, de Armas N, Salido GM, Iovanna JL, Santofimia-Castaño P, Gonzalez A. Melatonin controls cell proliferation and modulates mitochondrial physiology in pancreatic stellate cells. J Physiol Biochem 2023; 79:235-249. [PMID: 36334253 PMCID: PMC9905253 DOI: 10.1007/s13105-022-00930-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 10/21/2022] [Indexed: 11/06/2022]
Abstract
We have investigated the effects of melatonin on major pathways related with cellular proliferation and energetic metabolism in pancreatic stellate cells. In the presence of melatonin (1 mM, 100 µM, 10 µM, or 1 µM), decreases in the phosphorylation of c-Jun N-terminal kinase and of p44/42 and an increase in the phosphorylation of p38 were observed. Cell viability dropped in the presence of melatonin. A rise in the phosphorylation of AMP-activated protein kinase was detected in the presence of 1 mM and 100 µM melatonin. Treatment with 1 mM melatonin decreased the phosphorylation of protein kinase B, whereas 100 µM and 10 µM melatonin increased its phosphorylation. An increase in the generation of mitochondrial reactive oxygen species and a decrease of mitochondrial membrane potential were noted following melatonin treatment. Basal and maximal respiration, ATP production by oxidative phosphorylation, spare capacity, and proton leak dropped in the presence of melatonin. The expression of complex I of the mitochondrial respiratory chain was augmented in the presence of melatonin. Conversely, in the presence of 1 mM melatonin, decreases in the expression of mitofusins 1 and 2 were detected. The glycolysis and the glycolytic capacity were diminished in cells treated with 1 mM or 100 µM melatonin. Increases in the expression of phosphofructokinase-1 and lactate dehydrogenase were noted in cells incubated with 100 µM, 10 µM, or 1 µM melatonin. The expression of glucose transporter 1 was increased in cells incubated with 10 µM or 1 µM melatonin. Conversely, 1 mM melatonin decreased the expression of all three proteins. Our results suggest that melatonin, at pharmacological concentrations, might modulate mitochondrial physiology and energy metabolism in addition to major pathways involved in pancreatic stellate cell proliferation.
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Affiliation(s)
- Matias Estaras
- grid.8393.10000000119412521Departamento de Fisiología, Instituto de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Avenida de Las Ciencias S/N, 10003 Cáceres, Spain
| | - Candido Ortiz-Placin
- grid.8393.10000000119412521Departamento de Fisiología, Instituto de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Avenida de Las Ciencias S/N, 10003 Cáceres, Spain
| | - Alba Castillejo-Rufo
- grid.8393.10000000119412521Departamento de Fisiología, Instituto de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Avenida de Las Ciencias S/N, 10003 Cáceres, Spain
| | | | - Gerardo Blanco
- Unidad de Cirugía Hepatobiliopancreática Y Transplante Hepático, Hospital Universitario, Badajoz, Spain
| | - Jose M. Mateos
- Departamento de Gastroenterología, Hospital Universitario, Cáceres, Spain
| | - Daniel Vara
- Departamento de Gastroenterología, Hospital Universitario, Cáceres, Spain
| | | | - Sandra Chamizo
- Departamento de Gastroenterología, Hospital Universitario, Cáceres, Spain
| | - Diego Lopez
- Unidad de Cirugía Hepatobiliopancreática Y Transplante Hepático, Hospital Universitario, Badajoz, Spain
| | - Adela Rojas
- Unidad de Cirugía Hepatobiliopancreática Y Transplante Hepático, Hospital Universitario, Badajoz, Spain
| | - Isabel Jaen
- Unidad de Cirugía Hepatobiliopancreática Y Transplante Hepático, Hospital Universitario, Badajoz, Spain
| | - Noelia de Armas
- Unidad de Cirugía Hepatobiliopancreática Y Transplante Hepático, Hospital Universitario, Badajoz, Spain
| | - Gines M. Salido
- grid.8393.10000000119412521Departamento de Fisiología, Instituto de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Avenida de Las Ciencias S/N, 10003 Cáceres, Spain
| | - Juan L. Iovanna
- grid.5399.60000 0001 2176 4817Centre de Recherche en Cancérologie de Marseille, INSERM U1068, CNRS UMR 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique Et Technologique de Luminy, Marseille, France
| | - Patricia Santofimia-Castaño
- grid.5399.60000 0001 2176 4817Centre de Recherche en Cancérologie de Marseille, INSERM U1068, CNRS UMR 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique Et Technologique de Luminy, Marseille, France
| | - Antonio Gonzalez
- Departamento de Fisiología, Instituto de Biomarcadores de Patologías Moleculares, Universidad de Extremadura, Avenida de Las Ciencias S/N, 10003, Cáceres, Spain.
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Sanchez-Collado J, Nieto-Felipe J, Jardin I, Bhardwaj R, Berna-Erro A, Salido GM, Smani T, Hediger MA, Lopez JJ, Rosado JA. Store-Operated Calcium Entry in Breast Cancer Cells Is Insensitive to Orai1 and STIM1 N-Linked Glycosylation. Cancers (Basel) 2022; 15:cancers15010203. [PMID: 36612199 PMCID: PMC9818078 DOI: 10.3390/cancers15010203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/23/2022] [Accepted: 12/26/2022] [Indexed: 12/31/2022] Open
Abstract
N-linked glycosylation is a post-translational modification that affects protein function, structure, and interaction with other proteins. The store-operated Ca2+ entry (SOCE) core proteins, Orai1 and STIM1, exhibit N-glycosylation consensus motifs. Abnormal SOCE has been associated to a number of disorders, including cancer, and alterations in Orai1 glycosylation have been related to cancer invasiveness and metastasis. Here we show that treatment of non-tumoral breast epithelial cells with tunicamycin attenuates SOCE. Meanwhile, tunicamycin was without effect on SOCE in luminal MCF7 and triple negative breast cancer (TNBC) MDA-MB-231 cells. Ca2+ imaging experiments revealed that expression of the glycosylation-deficient Orai1 mutant (Orai1N223A) did not alter SOCE in MCF10A, MCF7 and MDA-MB-231 cells. However, expression of the non-glycosylable STIM1 mutant (STIM1N131/171Q) significantly attenuated SOCE in MCF10A cells but was without effect in SOCE in MCF7 and MDA-MB-231 cells. In non-tumoral cells impairment of STIM1 N-linked glycosylation attenuated thapsigargin (TG)-induced caspase-3 activation while in breast cancer cells, which exhibit a smaller caspase-3 activity in response to TG, expression of the non-glycosylable STIM1 mutant (STIM1N131/171Q) was without effect on TG-evoked caspase-3 activation. Summarizing, STIM1 N-linked glycosylation is essential for full SOCE activation in non-tumoral breast epithelial cells; by contrast, SOCE in breast cancer MCF7 and MDA-MB-231 cells is insensitive to Orai1 and STIM1 N-linked glycosylation, and this event might participate in the development of apoptosis resistance.
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Affiliation(s)
- Jose Sanchez-Collado
- Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - Joel Nieto-Felipe
- Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - Isaac Jardin
- Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - Rajesh Bhardwaj
- Membrane Transport Discovery Lab, Department of Nephrology and Hypertension and Department of Biomedical Research, University of Bern, CH-3010 Bern, Switzerland
| | - Alejandro Berna-Erro
- Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - Gines M. Salido
- Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - Tarik Smani
- Department of Medical Physiology and Biophysic, Institute of Biomedicine of Sevilla, 41013 Sevilla, Spain
| | - Matthias A Hediger
- Membrane Transport Discovery Lab, Department of Nephrology and Hypertension and Department of Biomedical Research, University of Bern, CH-3010 Bern, Switzerland
| | - Jose J. Lopez
- Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
- Correspondence: Correspondence: (J.J.L.); (J.A.R.)
| | - Juan A. Rosado
- Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
- Correspondence: Correspondence: (J.J.L.); (J.A.R.)
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7
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Jardin I, Berna-Erro A, Nieto-Felipe J, Macias A, Sanchez-Collado J, Lopez JJ, Salido GM, Rosado JA. Similarities and Differences between the Orai1 Variants: Orai1α and Orai1β. Int J Mol Sci 2022; 23:ijms232314568. [PMID: 36498894 PMCID: PMC9735889 DOI: 10.3390/ijms232314568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/16/2022] [Accepted: 11/21/2022] [Indexed: 11/24/2022] Open
Abstract
Orai1, the first identified member of the Orai protein family, is ubiquitously expressed in the animal kingdom. Orai1 was initially characterized as the channel responsible for the store-operated calcium entry (SOCE), a major mechanism that allows cytosolic calcium concentration increments upon receptor-mediated IP3 generation, which results in intracellular Ca2+ store depletion. Furthermore, current evidence supports that abnormal Orai1 expression or function underlies several disorders. Orai1 is, together with STIM1, the key element of SOCE, conducting the Ca2+ release-activated Ca2+ (CRAC) current and, in association with TRPC1, the store-operated Ca2+ (SOC) current. Additionally, Orai1 is involved in non-capacitative pathways, as the arachidonate-regulated or LTC4-regulated Ca2+ channel (ARC/LRC), store-independent Ca2+ influx activated by the secretory pathway Ca2+-ATPase (SPCA2) and the small conductance Ca2+-activated K+ channel 3 (SK3). Furthermore, Orai1 possesses two variants, Orai1α and Orai1β, the latter lacking 63 amino acids in the N-terminus as compared to the full-length Orai1α form, which confers distinct features to each variant. Here, we review the current knowledge about the differences between Orai1α and Orai1β, the implications of the Ca2+ signals triggered by each variant, and their downstream modulatory effect within the cell.
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Sanchez-Collado J, Lopez JJ, Jardin I, Berna-Erro A, Camello PJ, Cantonero C, Smani T, Salido GM, Rosado JA. Orai1α, but not Orai1β, co-localizes with TRPC1 and is required for its plasma membrane location and activation in HeLa cells. Cell Mol Life Sci 2022; 79:33. [PMID: 34988680 PMCID: PMC8732813 DOI: 10.1007/s00018-021-04098-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/02/2021] [Accepted: 12/15/2021] [Indexed: 12/15/2022]
Abstract
The identification of two variants of the canonical pore-forming subunit of the Ca2+ release-activated Ca2+ (CRAC) channel Orai1, Orai1α and Orai1β, in mammalian cells arises the question whether they exhibit different functional characteristics. Orai1α and Orai1β differ in the N-terminal 63 amino acids, exclusive of Orai1α, and show different sensitivities to Ca2+-dependent inactivation, as well as distinct ability to form arachidonate-regulated channels. We have evaluated the role of both Orai1 variants in the activation of TRPC1 in HeLa cells. We found that Orai1α and Orai1β are required for the maintenance of regenerative Ca2+ oscillations, while TRPC1 plays a role in agonist-induced Ca2+ influx but is not essential for Ca2+ oscillations. Using APEX2 proximity labeling, co-immunoprecipitation and the fluorescence of G-GECO1.2 fused to Orai1α our results indicate that agonist stimulation and Ca2+ store depletion enhance Orai1α–TRPC1 interaction. Orai1α is essential for TRPC1 plasma membrane location and activation. Thus, TRPC1 function in HeLa cells depends on Ca2+ influx through Orai1α exclusively.
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Affiliation(s)
- Jose Sanchez-Collado
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003, Caceres, Spain
| | - Jose J Lopez
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003, Caceres, Spain.
| | - Isaac Jardin
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003, Caceres, Spain
| | - Alejandro Berna-Erro
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003, Caceres, Spain
| | - Pedro J Camello
- Department of Physiology, (Smooth Muscle Physiology Research Group), Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003, Caceres, Spain
| | - Carlos Cantonero
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003, Caceres, Spain
| | - Tarik Smani
- Department of Medical Physiology and Biophysics, University of Seville, Seville, Spain.,Group of Cardiovascular Pathophysiology, Institute of Biomedicine of Seville, University Hospital of Virgen del Rocio/University of Seville/CSIC, Seville, Spain
| | - Gines M Salido
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003, Caceres, Spain
| | - Juan A Rosado
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, 10003, Caceres, Spain.
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9
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Sanchez-Collado J, Jardin I, López JJ, Ronco V, Salido GM, Dubois C, Prevarskaya N, Rosado JA. Role of Orai3 in the Pathophysiology of Cancer. Int J Mol Sci 2021; 22:ijms222111426. [PMID: 34768857 PMCID: PMC8584145 DOI: 10.3390/ijms222111426] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/18/2021] [Accepted: 10/21/2021] [Indexed: 01/12/2023] Open
Abstract
The mammalian exclusive Orai3 channel participates in the generation and/or modulation of two independent Ca2+ currents, the store-operated current, Icrac, involving functional interactions between the stromal interaction molecules (STIM), STIM1/STIM2, and Orai1/Orai2/Orai3, as well as the store-independent arachidonic acid (AA) (or leukotriene C4)-regulated current Iarc, which involves Orai1, Orai3 and STIM1. Overexpression of functional Orai3 has been described in different neoplastic cells and cancer tissue samples as compared to non-tumor cells or normal adjacent tissue. In these cells, Orai3 exhibits a cell-specific relevance in Ca2+ influx. In estrogen receptor-positive breast cancer cells and non-small cell lung cancer (NSCLC) cells store-operated Ca2+ entry (SOCE) is strongly dependent on Orai3 expression while in colorectal cancer and pancreatic adenocarcinoma cells Orai3 predominantly modulates SOCE. On the other hand, in prostate cancer cells Orai3 expression has been associated with the formation of Orai1/Orai3 heteromeric channels regulated by AA and reduction in SOCE, thus leading to enhanced proliferation. Orai3 overexpression is associated with supporting several cancer hallmarks, including cell cycle progression, proliferation, migration, and apoptosis resistance. This review summarizes the current knowledge concerning the functional role of Orai3 in the pathogenesis of cancer.
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Affiliation(s)
- Jose Sanchez-Collado
- Cell Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, 10003 Caceres, Spain; (J.S.-C.); (I.J.); (V.R.); (G.M.S.)
| | - Isaac Jardin
- Cell Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, 10003 Caceres, Spain; (J.S.-C.); (I.J.); (V.R.); (G.M.S.)
| | - Jose J. López
- Cell Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, 10003 Caceres, Spain; (J.S.-C.); (I.J.); (V.R.); (G.M.S.)
- Correspondence: (J.J.L.); (J.A.R.)
| | - Victor Ronco
- Cell Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, 10003 Caceres, Spain; (J.S.-C.); (I.J.); (V.R.); (G.M.S.)
| | - Gines M. Salido
- Cell Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, 10003 Caceres, Spain; (J.S.-C.); (I.J.); (V.R.); (G.M.S.)
| | - Charlotte Dubois
- Laboratory of Cell Physiology, INSERM U1003, Laboratory of Excellence Ion Channels Science and Therapeutics, Department of Biology, Faculty of Science and Technologiesa, University of Lille, 59650 Villeneuve d’Ascq, France; (C.D.); (N.P.)
| | - Natalia Prevarskaya
- Laboratory of Cell Physiology, INSERM U1003, Laboratory of Excellence Ion Channels Science and Therapeutics, Department of Biology, Faculty of Science and Technologiesa, University of Lille, 59650 Villeneuve d’Ascq, France; (C.D.); (N.P.)
| | - Juan A. Rosado
- Cell Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, 10003 Caceres, Spain; (J.S.-C.); (I.J.); (V.R.); (G.M.S.)
- Correspondence: (J.J.L.); (J.A.R.)
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10
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Estaras M, Gonzalez-Portillo MR, Fernandez-Bermejo M, Mateos JM, Vara D, Blanco-Fernandez G, Lopez-Guerra D, Roncero V, Salido GM, González A. Melatonin Induces Apoptosis and Modulates Cyclin Expression and MAPK Phosphorylation in Pancreatic Stellate Cells Subjected to Hypoxia. Int J Mol Sci 2021; 22:ijms22115555. [PMID: 34074034 PMCID: PMC8197391 DOI: 10.3390/ijms22115555] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/17/2021] [Accepted: 05/19/2021] [Indexed: 02/06/2023] Open
Abstract
In certain diseases of the pancreas, pancreatic stellate cells form an important part of fibrosis and are critical for the development of cancer cells. A hypoxic condition develops within the tumor, to which pancreatic stellate cells adapt and are able to proliferate. The consequence is the growth of the tumor. Melatonin, the product of the pineal gland, is gaining attention as an agent with therapeutic potential against pancreatic cancers. Its actions on tumor cells lead, in general, to a reduction in cell viability and proliferation. However, its effects on pancreatic stellate cells subjected to hypoxia are less known. In this study, we evaluated the actions of pharmacological concentrations of melatonin (1 mM–1 µM) on pancreatic stellate cells subjected to hypoxia. The results show that melatonin induced a decrease in cell viability at the highest concentrations tested. Similarly, the incorporation of BrdU into DNA was diminished by melatonin. The expression of cyclins A and D also was decreased in the presence of melatonin. Upon treatment of cells with melatonin, increases in the expression of major markers of ER stress, namely BIP, phospho-eIF2α and ATF-4, were detected. Modulation of apoptosis was noticed as an increase in caspase-3 activation. In addition, changes in the phosphorylated state of p44/42, p38 and JNK MAPKs were detected in cells treated with melatonin. A slight decrease in the content of α-smooth muscle actin was detected in cells treated with melatonin. Finally, treatment of cells with melatonin decreased the expression of matrix metalloproteinases 2, 3, 9 and 13. Our observations suggest that melatonin, at pharmacological concentrations, diminishes the proliferation of pancreatic stellate cells subjected to hypoxia through modulation of cell cycle, apoptosis and the activation of crucial MAPKs. Cellular responses might involve certain ER stress regulator proteins. In view of the results, melatonin could be taken into consideration as a potential therapeutic agent for pancreatic fibrosis.
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Affiliation(s)
- Matias Estaras
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain; (M.E.); (M.R.G.-P.); (G.M.S.)
| | - Manuel R. Gonzalez-Portillo
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain; (M.E.); (M.R.G.-P.); (G.M.S.)
| | - Miguel Fernandez-Bermejo
- Department of Gastroenterology, San Pedro de Alcantara Hospital, 10003 Caceres, Spain; (M.F.-B.); (J.M.M.); (D.V.)
| | - Jose M. Mateos
- Department of Gastroenterology, San Pedro de Alcantara Hospital, 10003 Caceres, Spain; (M.F.-B.); (J.M.M.); (D.V.)
| | - Daniel Vara
- Department of Gastroenterology, San Pedro de Alcantara Hospital, 10003 Caceres, Spain; (M.F.-B.); (J.M.M.); (D.V.)
| | - Gerardo Blanco-Fernandez
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, University Hospital, 06080 Badajoz, Spain; (G.B.-F.); (D.L.-G.)
| | - Diego Lopez-Guerra
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, University Hospital, 06080 Badajoz, Spain; (G.B.-F.); (D.L.-G.)
| | - Vicente Roncero
- Unit of Histology and Pathological Anatomy, Veterinary Faculty, University of Extremadura, 10003 Caceres, Spain;
| | - Gines M. Salido
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain; (M.E.); (M.R.G.-P.); (G.M.S.)
| | - Antonio González
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain; (M.E.); (M.R.G.-P.); (G.M.S.)
- Correspondence:
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11
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Estaras M, Gonzalez-Portillo MR, Martinez R, Garcia A, Estevez M, Fernandez-Bermejo M, Mateos JM, Vara D, Blanco-Fernández G, Lopez-Guerra D, Roncero V, Salido GM, Gonzalez A. Melatonin Modulates the Antioxidant Defenses and the Expression of Proinflammatory Mediators in Pancreatic Stellate Cells Subjected to Hypoxia. Antioxidants (Basel) 2021; 10:antiox10040577. [PMID: 33918063 PMCID: PMC8070371 DOI: 10.3390/antiox10040577] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/01/2021] [Accepted: 04/05/2021] [Indexed: 12/11/2022] Open
Abstract
Pancreatic stellate cells (PSC) play a major role in the formation of fibrotic tissue in pancreatic tumors. On its side, melatonin is a putative therapeutic agent for pancreatic cancer and inflammation. In this work, the actions of melatonin on PSC subjected to hypoxia were evaluated. Reactive oxygen species (ROS) generation reduced (GSH) and oxidized (GSSG) levels of glutathione, and protein and lipid oxidation were analyzed. The phosphorylation of nuclear factor erythroid 2-related factor (Nrf2), nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB), and the regulatory protein nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor-alpha (IκBα) was studied. The expression of Nrf2-regulated antioxidant enzymes, superoxide dismutase (SOD) enzymes, cyclooxygenase 2 (COX-2), interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) were also studied. Total antioxidant capacity (TAC) was assayed. Finally, cell viability was studied. Under hypoxia and in the presence of melatonin generation of ROS was observed. No increases in the oxidation of proteins or lipids were detected. The phosphorylation of Nrf2 and the expression of the antioxidant enzymes catalytic subunit of glutamate-cysteine ligase, catalase, NAD(P)H-quinone oxidoreductase 1, heme oxygenase-1, SOD1, and of SOD2 were augmented. The TAC was increased. Protein kinase C was involved in the effects of melatonin. Melatonin decreased the GSH/GSSG ratio at the highest concentration tested. Cell viability dropped in the presence of melatonin. Finally, melatonin diminished the phosphorylation of NF-kB and the expression of COX-2, IL-6, and TNF-α. Our results indicate that melatonin, at pharmacological concentrations, modulates the red-ox state, viability, and the expression of proinflammatory mediators in PSC subjected to hypoxia.
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Affiliation(s)
- Matias Estaras
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain; (M.E.); (M.R.G.-P.); (G.M.S.)
| | - Manuel R. Gonzalez-Portillo
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain; (M.E.); (M.R.G.-P.); (G.M.S.)
| | - Remigio Martinez
- Department of Animal Health, Veterinary Faculty, University of Extremadura, 10003 Caceres, Spain;
| | - Alfredo Garcia
- Department of Animal Production, CICYTEX-La Orden, 06187 Badajoz, Spain;
| | - Mario Estevez
- IPROCAR Research Institute, Food Technology, University of Extremadura, 10003 Cáceres, Spain;
| | - Miguel Fernandez-Bermejo
- Department of Gastroenterology, San Pedro de Alcantara Hospital, 10003 Caceres, Spain; (M.F.-B.); (J.M.M.); (D.V.)
| | - Jose M. Mateos
- Department of Gastroenterology, San Pedro de Alcantara Hospital, 10003 Caceres, Spain; (M.F.-B.); (J.M.M.); (D.V.)
| | - Daniel Vara
- Department of Gastroenterology, San Pedro de Alcantara Hospital, 10003 Caceres, Spain; (M.F.-B.); (J.M.M.); (D.V.)
| | - Gerardo Blanco-Fernández
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, 06080 Badajoz, Spain; (G.B.-F.); (D.L.-G.)
| | - Diego Lopez-Guerra
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, 06080 Badajoz, Spain; (G.B.-F.); (D.L.-G.)
| | - Vicente Roncero
- Unit of Histology and Pathological Anatomy, Veterinary Faculty, University of Extremadura, 10003 Caceres, Spain;
| | - Gines M. Salido
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain; (M.E.); (M.R.G.-P.); (G.M.S.)
| | - Antonio Gonzalez
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain; (M.E.); (M.R.G.-P.); (G.M.S.)
- Correspondence:
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12
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Cantonero C, Camello PJ, Salido GM, Rosado JA, Redondo PC. TMEM97 facilitates the activation of SOCE by downregulating the association of cholesterol to Orai1 in MDA-MB-231 cells. Biochim Biophys Acta Mol Cell Biol Lipids 2021; 1866:158906. [PMID: 33618021 DOI: 10.1016/j.bbalip.2021.158906] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 02/02/2021] [Accepted: 02/11/2021] [Indexed: 01/03/2023]
Abstract
The expression of TMEM97, a regulator of cholesterol transport, has been reported to be enhanced in some tumour cells. We have recently shown that TMEM97 is involved in the proliferation of the breast cancer cell line MDA-MB-231, probably through changes in store-operated calcium entry (SOCE). By using silencing and overexpression of TMEM97 in MDA-MB-231 cells (two manoeuvres that either reduce or increase the calcium influx, respectively), we show enhanced cholesterol uptake in these cells as compared to the non-tumoral breast cell line, MCF10A. The enhanced cholesterol uptake in MDA-MB-231 cells was inhibited by silencing TMEM97, while overexpression of this protein increased cholesterol uptake in MCF10A cells and, therefore, indicating that this protein plays a role in the enhanced cholesterol uptake in MDA-MB-231 cancer cell line. TMEM97 silencing and overexpression resulted in an increase and decrease in the association of cholesterol to the SOCE calcium channel Orai1, respectively. Interestingly, silencing of TMEM97 in MDA-MB-231 cells significantly reduced the co-localization of Orai1 with the SOCE regulatory protein STIM1. Finally, neither silencing nor overexpression of TMEM97 altered SOCE in MDA-MB-231 cells transfected with the cholesterol insensible mutant of Orai1(Y80E). Our results reveal a novel regulatory mechanism of SOCE that relies on TMEM97 activity that courses through the reduction of the cholesterol content in the plasma membrane, and subsequently, by impairing its interaction with Orai1.
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Affiliation(s)
- C Cantonero
- Department of Physiology (Phycell group), University of Extremadura, Caceres 10003, Spain
| | - P J Camello
- Department of Physiology (FIMUL group), University of Extremadura, Caceres 10003, Spain
| | - G M Salido
- Department of Physiology (Phycell group), University of Extremadura, Caceres 10003, Spain
| | - J A Rosado
- Department of Physiology (Phycell group), University of Extremadura, Caceres 10003, Spain
| | - P C Redondo
- Department of Physiology (Phycell group), University of Extremadura, Caceres 10003, Spain.
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13
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Jardin I, Diez-Bello R, Falcon D, Alvarado S, Regodon S, Salido GM, Smani T, Rosado JA. Melatonin downregulates TRPC6, impairing store-operated calcium entry in triple-negative breast cancer cells. J Biol Chem 2021; 296:100254. [PMID: 33380424 PMCID: PMC7948746 DOI: 10.1074/jbc.ra120.015769] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 12/24/2020] [Accepted: 12/30/2020] [Indexed: 12/15/2022] Open
Abstract
Melatonin has been reported to induce effective reduction in growth and development in a variety of tumors, including breast cancer. In triple-negative breast cancer (TNBC) cells, melatonin attenuates a variety of cancer features, such as tumor growth and apoptosis resistance, through a number of still poorly characterized mechanisms. One biological process that is important for TNBC cells is store-operated Ca2+ entry (SOCE), which is modulated by TRPC6 expression and function. We wondered whether melatonin might intersect with this pathway as part of its anticancer activity. We show that melatonin, in the nanomolar range, significantly attenuates TNBC MDA-MB-231 cell viability, proliferation, and migration in a time- and concentration-dependent manner, without having any effect on nontumoral breast epithelial MCF10A cells. Pretreatment with different concentrations of melatonin significantly reduced SOCE in MDA-MB-231 cells without altering Ca2+ release from the intracellular stores. By contrast, SOCE in MCF10A cells was unaffected by melatonin. In the TNBC MDA-MB-468 cell line, melatonin not only attenuated viability, migration, and SOCE, but also reduced TRPC6 expression in a time- and concentration-dependent manner, without altering expression or function of the Ca2+ channel Orai1. The expression of exogenous TRPC6 overcame the effect of melatonin on SOCE and cell proliferation, and silencing or inhibition of TRPC6 impaired the inhibitory effect of melatonin on SOCE. These findings indicate that TRPC6 downregulation might be involved in melatonin's inhibitory effects on Ca2+ influx and the maintenance of cancer hallmarks and point toward a novel antitumoral mechanism of melatonin in TNBC cells.
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Affiliation(s)
- Isaac Jardin
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain.
| | - Raquel Diez-Bello
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain
| | - Debora Falcon
- Cardiovascular Physiopathology Group, Institute of Biomedicine of Sevilla, Sevilla, Spain
| | - Sandra Alvarado
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain
| | - Sergio Regodon
- Department of Animal Medicine, University of Extremadura, Caceres, Spain
| | - Gines M Salido
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain
| | - Tarik Smani
- Department of Medical Physiology and Biophysic, Institute of Biomedicine of Sevilla, Sevilla, Spain
| | - Juan A Rosado
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers (IMPB), University of Extremadura, Caceres, Spain
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14
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Estaras M, Martinez-Morcillo S, García A, Martinez R, Estevez M, Perez-Lopez M, Miguez MP, Fernandez-Bermejo M, Mateos JM, Vara D, Blanco G, Lopez D, Roncero V, Salido GM, Gonzalez A. Pancreatic stellate cells exhibit adaptation to oxidative stress evoked by hypoxia. Biol Cell 2020; 112:280-299. [PMID: 32632968 DOI: 10.1111/boc.202000020] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 05/31/2020] [Accepted: 06/04/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND INFORMATION Pancreatic stellate cells play a key role in the fibrosis that develops in diseases such as pancreatic cancer. In the growing tumour, a hypoxia condition develops under which cancer cells are able to proliferate. The growth of fibrotic tissue contributes to hypoxia. In this study, the effect of hypoxia (1% O2 ) on pancreatic stellate cells physiology was investigated. Changes in intracellular free-Ca2+ concentration, mitochondrial free-Ca2+ concentration and mitochondrial membrane potential were studied by fluorescence techniques. The status of enzymes responsible for the cellular oxidative state was analyzed by quantitative reverse transcription-polymerase chain reaction, high-performance liquid chromatography, spectrophotometric and fluorimetric methods and by Western blotting analysis. Cell viability and proliferation were studied by crystal violet test, 5-bromo-2-deoxyuridine cell proliferation test and Western blotting analysis. Finally, cell migration was studied employing the wound healing assay. RESULTS Hypoxia induced an increase in intracellular and mitochondrial free-Ca2+ concentration, whereas mitochondrial membrane potential was decreased. An increase in mitochondrial reactive oxygen species production was observed. Additionally, an increase in the oxidation of proteins and lipids was detected. Moreover, cellular total antioxidant capacity was decreased. Increases in the expression of superoxide dismutase 1 and 2 were observed and superoxide dismutase activity was augmented. Hypoxia evoked a decrease in the oxidized/reduced glutathione ratio. An increase in the phosphorylation of nuclear factor erythroid 2-related factor and in expression of the antioxidant enzymes catalytic subunit of glutamate-cysteine ligase, catalase, NAD(P)H-quinone oxidoreductase 1 and heme oxygenase-1 were detected. The expression of cyclin A was decreased, whereas expression of cyclin D and the content of 5-bromo-2-deoxyuridine were increased. This was accompanied by an increase in cell viability. The phosphorylation state of c-Jun NH2 -terminal kinase was increased, whereas that of p44/42 and p38 was decreased. Finally, cells subjected to hypoxia maintained migration ability. CONCLUSIONS AND SIGNIFICANCE Hypoxia creates pro-oxidant conditions in pancreatic stellate cells to which cells adapt and leads to increased viability and proliferation.
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Affiliation(s)
- Matias Estaras
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
| | | | - Alfredo García
- Department of Animal Production, Cicytex-La Orden, Badajoz, Spain
| | - Remigio Martinez
- Department of Animal Health, Veterinary Faculty, University of Extremadura, Caceres, Spain
| | - Mario Estevez
- IPROCAR Research Institute, Food Technology, University of Extremadura, Caceres, 10003, Spain
| | - Marcos Perez-Lopez
- Unit of Toxicology, Veterinary Faculty, University of Extremadura, Caceres, Spain
| | - Maria P Miguez
- Unit of Toxicology, Veterinary Faculty, University of Extremadura, Caceres, Spain
| | | | - Jose M Mateos
- Department of Gastroenterology, San Pedro de Alcantara Hospital, Caceres, Spain
| | - Daniel Vara
- Department of Gastroenterology, San Pedro de Alcantara Hospital, Caceres, Spain
| | - Gerardo Blanco
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, Badajoz, Spain
| | - Diego Lopez
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, Badajoz, Spain
| | - Vicente Roncero
- Unit of Histology and Pathological Anatomy, Veterinary Faculty, University of Extremadura, Caceres, Spain
| | - Gines M Salido
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
| | - Antonio Gonzalez
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
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15
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Estaras M, Marchena AM, Fernandez-Bermejo M, Mateos JM, Vara D, Roncero V, Salido GM, Gonzalez A. The melatonin receptor antagonist luzindole induces the activation of cellular stress responses and decreases viability of rat pancreatic stellate cells. J Appl Toxicol 2020; 40:1554-1565. [PMID: 32567733 DOI: 10.1002/jat.4018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 05/12/2020] [Accepted: 05/15/2020] [Indexed: 12/22/2022]
Abstract
In this study, we have examined the effects of luzindole, a melatonin receptor-antagonist, on cultured pancreatic stellate cells. Intracellular free-Ca2+ concentration, production of reactive oxygen species (ROS), activation of mitogen-activated protein kinases (MAPK), endoplasmic reticulum stress and cell viability were analyzed. Stimulation of cells with the luzindole (1, 5, 10 and 50 μm) evoked a slow and progressive increase in intracellular free Ca2+ ([Ca2+ ]i ) towards a plateau. The effect of the compound on Ca2+ mobilization depended on the concentration used. Incubation of cells with the sarcoendoplasmic reticulum Ca2+ -ATPase inhibitor thapsigargin (1 μm), in the absence of Ca2+ in the extracellular medium, induced a transient increase in [Ca2+ ]i . In the presence of thapsigargin, the addition of luzindole to the cells failed to induce further mobilization of Ca2+ . Luzindole induced a concentration-dependent increase in ROS generation, both in the cytosol and in the mitochondria. This effect was smaller in the absence of extracellular Ca2+ . In the presence of luzindole the phosphorylation of p44/42 and p38 MAPKs was increased, whereas no changes in the phosphorylation of JNK could be noted. Moreover, the detection of the endoplasmic reticulum stress-sensor BiP was increased in the presence of luzindole. Finally, viability was decreased in cells treated with luzindole. Because cellular membrane receptors for melatonin have not been detected in pancreatic stellate cells, we conclude that luzindole could exert direct effects that are not mediated through its action on melatonin membrane receptors.
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Affiliation(s)
- Matias Estaras
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
| | - Ana M Marchena
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
| | | | - Jose M Mateos
- Department of Gastroenterology, San Pedro de Alcantara Hospital, Caceres, Spain
| | - Daniel Vara
- Department of Gastroenterology, San Pedro de Alcantara Hospital, Caceres, Spain
| | - Vicente Roncero
- Unit of Histology and Pathological Anatomy, Veterinary Faculty, University of Extremadura, Caceres, Spain
| | - Gines M Salido
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
| | - Antonio Gonzalez
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
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16
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Estaras M, Peña FJ, Tapia JA, Fernandez-Bermejo M, Mateos JM, Vara D, Roncero V, Blanco G, Lopez D, Salido GM, Gonzalez A. Melatonin modulates proliferation of pancreatic stellate cells through caspase-3 activation and changes in cyclin A and D expression. J Physiol Biochem 2020; 76:345-355. [PMID: 32361979 DOI: 10.1007/s13105-020-00740-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 04/17/2020] [Indexed: 12/12/2022]
Abstract
In this study, the effects of melatonin (1 μM-1 mM) on pancreatic stellate cells (PSC) have been examined. Cell viability and proliferation, caspase-3 activation, and the expression of cyclin A and cyclin D were analyzed. Our results show that melatonin decreased PSC viability in a time- and concentration-dependent manner. This effect was not inhibited by treatment of cells with MT1, MT2, calmodulin, or ROR-alpha inhibitors prior to melatonin addition. Activation of caspase-3 in response to melatonin was detected. The expression of cyclin A and cyclin D was decreased in cells treated with melatonin. Finally, changes in BrdU incorporation into the newly synthesized DNA of proliferating cells were also observed in the presence of melatonin. We conclude that melatonin, at pharmacological concentrations, modulates proliferation of PSC through activation of apoptosis and involving crucial regulators of the cell cycle. These actions might not require specific melatonin receptors. Our observations suggest that melatonin, at high doses, could potentially exert anti-fibrotic effects and, thus, could be taken into consideration as supportive treatment in the therapy of pancreatic diseases.
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Affiliation(s)
- Matias Estaras
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Avenida de las Ciencias s/n, E-10003, Cáceres, Spain
| | - Fernando J Peña
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - José A Tapia
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Avenida de las Ciencias s/n, E-10003, Cáceres, Spain
| | | | - Jose M Mateos
- Department of Gastroenterology, San Pedro de Alcantara Hospital, Cáceres, Spain
| | - Daniel Vara
- Department of Gastroenterology, San Pedro de Alcantara Hospital, Cáceres, Spain
| | - Vicente Roncero
- Unit of Histology and Pathological Anatomy, Veterinary Faculty, University of Extremadura, Cáceres, Spain
| | - Gerardo Blanco
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, Badajoz, Spain
| | - Diego Lopez
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, Badajoz, Spain
| | - Gines M Salido
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Avenida de las Ciencias s/n, E-10003, Cáceres, Spain
| | - Antonio Gonzalez
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Avenida de las Ciencias s/n, E-10003, Cáceres, Spain.
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Gonzalez A, Estaras M, Martinez-Morcillo S, Martinez R, García A, Estévez M, Santofimia-Castaño P, Tapia JA, Moreno N, Pérez-López M, Míguez MP, Blanco-Fernández G, Lopez-Guerra D, Fernandez-Bermejo M, Mateos JM, Vara D, Roncero V, Salido GM. Melatonin modulates red-ox state and decreases viability of rat pancreatic stellate cells. Sci Rep 2020; 10:6352. [PMID: 32286500 PMCID: PMC7156707 DOI: 10.1038/s41598-020-63433-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 03/30/2020] [Indexed: 12/13/2022] Open
Abstract
In this work we have studied the effects of pharmacological concentrations of melatonin (1 µM-1 mM) on pancreatic stellate cells (PSC). Cell viability was analyzed by AlamarBlue test. Production of reactive oxygen species (ROS) was monitored following CM-H2DCFDA and MitoSOX Red-derived fluorescence. Total protein carbonyls and lipid peroxidation were analyzed by HPLC and spectrophotometric methods respectively. Mitochondrial membrane potential (ψm) was monitored by TMRM-derived fluorescence. Reduced (GSH) and oxidized (GSSG) levels of glutathione were determined by fluorescence techniques. Quantitative reverse transcription-polymerase chain reaction was employed to detect the expression of Nrf2-regulated antioxidant enzymes. Determination of SOD activity and total antioxidant capacity (TAC) were carried out by colorimetric methods, whereas expression of SOD was analyzed by Western blotting and RT-qPCR. The results show that melatonin decreased PSC viability in a concentration-dependent manner. Melatonin evoked a concentration-dependent increase in ROS production in the mitochondria and in the cytosol. Oxidation of proteins was detected in the presence of melatonin, whereas lipids oxidation was not observed. Depolarization of ψm was noted with 1 mM melatonin. A decrease in the GSH/GSSG ratio was observed, that depended on the concentration of melatonin used. A concentration-dependent increase in the expression of the antioxidant enzymes catalytic subunit of glutamate-cysteine ligase, catalase, NAD(P)H-quinone oxidoreductase 1 and heme oxygenase-1 was detected in cells incubated with melatonin. Finally, decreases in the expression and in the activity of superoxide dismutase were observed. We conclude that pharmacological concentrations melatonin modify the redox state of PSC, which might decrease cellular viability.
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Affiliation(s)
- Antonio Gonzalez
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain.
| | - Matias Estaras
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
| | | | - Remigio Martinez
- Department of Animal Health, Veterinary Faculty, University of Extremadura, Caceres, Spain
| | - Alfredo García
- Department of Animal Production, CICYTEX-La Orden, Guadajira, Badajoz, Spain
| | - Mario Estévez
- IPROCAR Research Institute, Food Technology, University of Extremadura, 10003, Cáceres, Spain
| | - Patricia Santofimia-Castaño
- Centre de Recherche en Cancérologie de Marseille, INSERM U1068, CNRS UMR 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, France
| | - Jose A Tapia
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
| | - Noelia Moreno
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
| | - Marcos Pérez-López
- Unit of Toxicology, Veterinary Faculty, University of Extremadura, Caceres, Spain
| | - María P Míguez
- Unit of Toxicology, Veterinary Faculty, University of Extremadura, Caceres, Spain
| | - Gerardo Blanco-Fernández
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, Badajoz, Spain
| | - Diego Lopez-Guerra
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, Badajoz, Spain
| | | | - Jose M Mateos
- Department of Gastroenterology, San Pedro de Alcantara Hospital, Caceres, Spain
| | - Daniel Vara
- Department of Gastroenterology, San Pedro de Alcantara Hospital, Caceres, Spain
| | - Vicente Roncero
- Unit of Histology and Pathological Anatomy, Veterinary Faculty, University of Extremadura, Caceres, Spain
| | - Gines M Salido
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
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Lopez JJ, Jardin I, Albarrán L, Sanchez-Collado J, Cantonero C, Salido GM, Smani T, Rosado JA. Molecular Basis and Regulation of Store-Operated Calcium Entry. Adv Exp Med Biol 2020; 1131:445-469. [PMID: 31646520 DOI: 10.1007/978-3-030-12457-1_17] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Store-operated Ca2+ entry (SOCE) is a ubiquitous mechanism for Ca2+ influx in mammalian cells with important physiological implications. Since the discovery of SOCE more than three decades ago, the mechanism that communicates the information about the amount of Ca2+ accumulated in the intracellular Ca2+ stores to the plasma membrane channels and the nature of these channels have been matters of intense investigation and debate. The stromal interaction molecule-1 (STIM1) has been identified as the Ca2+ sensor of the intracellular Ca2+ compartments that activates the store-operated channels. STIM1 regulates two types of store-dependent channels: the Ca2+ release-activated Ca2+ (CRAC) channels, formed by Orai1 subunits, that conduct the highly Ca2+ selective current I CRAC and the cation permeable store-operated Ca2+ (SOC) channels, which consist of Orai1 and TRPC1 proteins and conduct the non-selective current I SOC. While the crystal structure of Drosophila CRAC channel has already been solved, the architecture of the SOC channels still remains unclear. The dynamic interaction of STIM1 with the store-operated channels is modulated by a number of proteins that either support the formation of the functional STIM1-channel complex or protect the cell against Ca2+ overload.
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Affiliation(s)
- Jose J Lopez
- Department of Physiology, Cell Physiology Research Group and Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Isaac Jardin
- Department of Physiology, Cell Physiology Research Group and Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain.
| | - Letizia Albarrán
- Department of Physiology, Cell Physiology Research Group and Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Jose Sanchez-Collado
- Department of Physiology, Cell Physiology Research Group and Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Carlos Cantonero
- Department of Physiology, Cell Physiology Research Group and Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Gines M Salido
- Department of Physiology, Cell Physiology Research Group and Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Tarik Smani
- Department of Medical Physiology and Biophysics and Group of Cardiovascular Pathophysiology, Institute of Biomedicine of Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/University of Sevilla, Sevilla, Spain
| | - Juan A Rosado
- Department of Physiology, Cell Physiology Research Group and Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
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Estaras M, Ameur FZ, Roncero V, Fernandez-Bermejo M, Blanco G, Lopez D, Mateos JM, Salido GM, Gonzalez A. The melatonin receptor antagonist luzindole induces Ca 2+ mobilization, reactive oxygen species generation and impairs trypsin secretion in mouse pancreatic acinar cells. Biochim Biophys Acta Gen Subj 2019; 1863:129407. [PMID: 31381958 DOI: 10.1016/j.bbagen.2019.07.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 07/23/2019] [Accepted: 07/31/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND In this work we studied the effects of the melatonin receptor-antagonist luzindole (1 μM-50 μM) on isolated mouse pancreatic acinar cells. METHODS Changes in intracellular free-Ca2+ concentration, reactive oxygen species production and trypsin secretion were analyzed. RESULTS Luzindole induced increases in [Ca2+]i that diminished CCK-8 induced Ca2+ mobilization, compared with that observed when CCK-8 was applied alone. Treatment of cells with thapsigargin (1 μM), in the absence of Ca2+ in the extracellular medium, evoked a transient increase in [Ca2+]i. The additional incubation of cells with luzindole (10 μM) failed to induce further mobilization of Ca2+. In the presence of luzindole a concentration-dependent increase in ROS generation was observed that decreased in the absence of Ca2+ or by pretreatment of cells with melatonin (100 μM). Incubation of pancreatic acinar cells with luzindole (10 μM) impaired CCK-8-induced trypsin secretion. Melatonin was unable to revert the effect of luzindole on CCK-8-induced trypsin secretion. CONCLUSION The melatonin receptor-inhibitor luzindole induces Ca2+-mediated pro-oxidative conditions and impairment of enzyme secretion, which creates a situation in pancreatic acinar cells that might compromise their function. GENERAL SIGNIFICANCE The effects of luzindole that we have observed, might be unspecific and could mislead the observations when it is used to study the actions of melatonin on the gland. Another possibility is that melatonin receptors exhibit a basal or agonist-independent activity in pancreatic acinar cells, which might be modulated by melatonin or luzindole.
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Affiliation(s)
- Matias Estaras
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
| | - Fatma Z Ameur
- Laboratoire de Physiologie de la Nutrition et de Sécurité Alimentaire, Université d'Oran1, Ahmed BenBella, Algeria
| | - Vicente Roncero
- Unit of Histology and Pathological Anatomy, Veterinary Faculty, University of Extremadura, Caceres, Spain
| | | | - Gerardo Blanco
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, Badajoz, Spain
| | - Diego Lopez
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, Badajoz, Spain
| | - Jose M Mateos
- Department of Gastroenterology, San Pedro de Alcantara Hospital, Caceres, Spain
| | - Gines M Salido
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain
| | - Antonio Gonzalez
- Institute of Molecular Pathology Biomarkers, University of Extremadura, Caceres, Spain.
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Lopez E, Frischauf I, Jardin I, Derler I, Muik M, Cantonero C, Salido GM, Smani T, Rosado JA, Redondo PC. STIM1 phosphorylation at Y 316 modulates its interaction with SARAF and the activation of SOCE and ICRAC. J Cell Sci 2019; 132:jcs226019. [PMID: 30975919 DOI: 10.1242/jcs.226019] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 04/08/2019] [Indexed: 01/24/2023] Open
Abstract
Stromal interaction molecule 1 (STIM1) is one of the key elements for the activation of store-operated Ca2+ entry (SOCE). Hence, identification of the relevant phosphorylatable STIM1 residues with a possible role in the regulation of STIM1 function and SOCE is of interest. By performing a computational analysis, we identified that the Y316 residue is susceptible to phosphorylation. Expression of the STIM1-Y316F mutant in HEK293, NG115-401L and MEG-01 cells resulted in a reduction in STIM1 tyrosine phosphorylation, SOCE and the Ca2+ release-activated Ca2+ current (ICRAC). STIM1-Orai1 colocalization was reduced in HEK293 cells transfected with YFP-STIM1-Y316F compared to in cells with wild-type (WT) YFP-tagged STIM1. Additionally, the Y316F mutation altered the pattern of interaction between STIM1 and SARAF under resting conditions and upon Ca2+ store depletion. Expression of the STIM1 Y316F mutant enhanced slow Ca2+-dependent inactivation (SCDI) as compared to STIM1 WT, an effect that was abolished by SARAF knockdown. Finally, in NG115-401L cells transfected with shRNA targeting SARAF, expression of STIM1 Y316F induced greater SOCE than STIM1 WT. Taken together, our results provide evidence supporting the idea that phosphorylation of STIM1 at Y316 plays a relevant functional role in the activation and modulation of SOCE.
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Affiliation(s)
- Esther Lopez
- Department of Physiology, Cell Physiology Research Group, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - Irene Frischauf
- Molecular & Membrane Biophysics, Institute of Biophysics, Johannes Kepler University Linz, A-4020 Linz, Austria
| | - Isaac Jardin
- Department of Physiology, Cell Physiology Research Group, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - Isabella Derler
- Molecular & Membrane Biophysics, Institute of Biophysics, Johannes Kepler University Linz, A-4020 Linz, Austria
| | - Martin Muik
- Molecular & Membrane Biophysics, Institute of Biophysics, Johannes Kepler University Linz, A-4020 Linz, Austria
| | - Carlos Cantonero
- Department of Physiology, Cell Physiology Research Group, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - Gines M Salido
- Department of Physiology, Cell Physiology Research Group, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - Tarik Smani
- Department of Medical Physiology and Biophysics, Institute of Biomedicine of Seville (IBiS)/University of Seville/CIBERCV, 41013 Seville, Spain
| | - Juan A Rosado
- Department of Physiology, Cell Physiology Research Group, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - Pedro C Redondo
- Department of Physiology, Cell Physiology Research Group, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
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Estaras M, Moreno N, Santofimia-Castaño P, Martinez-Morcillo S, Roncero V, Blanco G, Lopez D, Fernandez-Bermejo M, Mateos JM, Iovanna JL, Salido GM, Gonzalez A. Melatonin induces reactive oxygen species generation and changes in glutathione levels and reduces viability in human pancreatic stellate cells. J Physiol Biochem 2019; 75:185-197. [PMID: 30868511 DOI: 10.1007/s13105-019-00671-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 02/26/2019] [Indexed: 12/12/2022]
Abstract
In this study, the effects of pharmacological concentrations of melatonin (1 μM-1 mM) on human pancreatic stellate cells (HPSCs) have been examined. Cell type-specific markers and expression of melatonin receptors were analyzed by western blot analysis. Changes in intracellular free Ca2+ concentration were followed by fluorimetric analysis of fura-2-loaded cells. Reduced glutathione (GSH) and oxidized glutathione (GSSG) levels were determined by fluorescence techniques. Production of reactive oxygen species (ROS) was monitored following 5-(and-6)-chloromethyl-2',7'-dichlorodihydrofluorescein diacetate acetyl ester and MitoSOX™ Red-derived fluorescence. Cell viability was studied using the AlamarBlue® test. Cultured cells expressed markers typical of stellate cells. However, cell membrane receptors for melatonin could not be detected. Thapsigargin, bradykinin, or melatonin induced changes in intracellular free Ca2+ concentration. In the presence of the indole, a decrease in the GSH/GSSG ratio was observed that depended on the concentration of melatonin used. Furthermore, the indole evoked a concentration-dependent increase in ROS production in the mitochondria and in the cytosol. Finally, melatonin decreased HPSC viability in a time and concentration-dependent manner. We conclude that melatonin, at pharmacological concentrations, induces changes in the oxidative state of HPSC. This might regulate cellular viability and could not involve specific plasma membrane receptors.
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Affiliation(s)
- Matias Estaras
- Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, Avenida Universidad s/n, 10003, Cáceres, Spain
| | - Noelia Moreno
- Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, Avenida Universidad s/n, 10003, Cáceres, Spain
| | - Patricia Santofimia-Castaño
- Centre de Recherche en Cancérologie de Marseille, INSERM U1068, CNRS UMR 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, France
| | | | - Vicente Roncero
- Unit of Histology and Pathological Anatomy, Veterinary Faculty, University of Extremadura, Cáceres, Spain
| | - Gerardo Blanco
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, Badajoz, Spain
| | - Diego Lopez
- Hepatobiliary-Pancreatic Surgery and Liver Transplant Unit, Infanta Cristina Hospital, Badajoz, Spain
| | | | - Jose M Mateos
- Department of Gastroenterology, San Pedro de Alcantara Hospital, Cáceres, Spain
| | - Juan L Iovanna
- Centre de Recherche en Cancérologie de Marseille, INSERM U1068, CNRS UMR 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, France
| | - Gines M Salido
- Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, Avenida Universidad s/n, 10003, Cáceres, Spain
| | - Antonio Gonzalez
- Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, Avenida Universidad s/n, 10003, Cáceres, Spain.
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Cantonero C, Sanchez-Collado J, Gonzalez-Nuñez MA, Salido GM, Lopez JJ, Jardin I, Rosado JA. Store-independent Orai1-mediated Ca 2+ entry and cancer. Cell Calcium 2019; 80:1-7. [PMID: 30921687 DOI: 10.1016/j.ceca.2019.02.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 02/28/2019] [Accepted: 02/28/2019] [Indexed: 12/22/2022]
Abstract
Ca2+ channels play an important role in the development of different types of cancer, and considerable progress has been made to understand the pathophysiological mechanisms underlying the role of Ca2+ influx in the development of different cancer hallmarks. Orai1 is among the most ubiquitous and multifunctional Ca2+ channels. Orai1 mediates the highly Ca2+-selective Ca2+ release-activated current (ICRAC) and participates in the less Ca2+-selective store-operated current (ISOC), along with STIM1 or STIM1 and TRPC1, respectively. Furthermore, Orai1 contributes to a variety of store-independent Ca2+ influx mechanisms, including the arachidonate-regulated Ca2+ current, together with Orai3 and the plasma membrane resident pool of STIM1, as well as the constitutive Ca2+ influx processes activated by the secretory pathway Ca2+-ATPase-2 (SPCA2) or supported by physical and functional interaction with the small conductance Ca2+-activated K+ channel 3 (SK3) or the voltage-dependent Kv10.1 channel. This review summarizes the current knowledge concerning the store-independent mechanisms of Ca2+ influx activation through Orai1 channels and their role in the development of different cancer features.
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Affiliation(s)
- C Cantonero
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - J Sanchez-Collado
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - M A Gonzalez-Nuñez
- Pathology Service, Hospital San Pedro de Alcantara, 10003 Cáceres, Spain
| | - G M Salido
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - J J Lopez
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - I Jardin
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - J A Rosado
- Cellular Physiology Research Group, Department of Physiology, Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain.
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Jardin I, Lopez JJ, Salido GM, Rosado JA. Store-Operated Ca 2+ Entry in Breast Cancer Cells: Remodeling and Functional Role. Int J Mol Sci 2018; 19:ijms19124053. [PMID: 30558192 PMCID: PMC6321005 DOI: 10.3390/ijms19124053] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 12/03/2018] [Accepted: 12/11/2018] [Indexed: 12/22/2022] Open
Abstract
Breast cancer is the most common type of cancer in women. It is a heterogeneous disease that ranges from the less undifferentiated luminal A to the more aggressive basal or triple negative breast cancer molecular subtype. Ca2+ influx from the extracellular medium, but more specifically store-operated Ca2+ entry (SOCE), has been reported to play an important role in tumorigenesis and the maintenance of a variety of cancer hallmarks, including cell migration, proliferation, invasion or epithelial to mesenchymal transition. Breast cancer cells remodel the expression and functional role of the molecular components of SOCE. This review focuses on the functional role and remodeling of SOCE in breast cancer cells. The current studies suggest the need to deepen our understanding of SOCE in the biology of the different breast cancer subtypes in order to develop new and specific therapeutic strategies.
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Affiliation(s)
- Isaac Jardin
- Department of Physiology, (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain.
| | - Jose J Lopez
- Department of Physiology, (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain.
| | - Gines M Salido
- Department of Physiology, (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain.
| | - Juan A Rosado
- Department of Physiology, (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain.
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Albarran L, Lopez JJ, Jardin I, Sanchez-Collado J, Berna-Erro A, Smani T, Camello PJ, Salido GM, Rosado JA. EFHB is a Novel Cytosolic Ca2+ Sensor That Modulates STIM1-SARAF Interaction. Cell Physiol Biochem 2018; 51:1164-1178. [PMID: 30481768 DOI: 10.1159/000495494] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 11/16/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS STIM1 and Orai1 are the key components of store-operated Ca2+ entry (SOCE). Among the proteins involved in the regulation of SOCE, SARAF prevents spontaneous activation of SOCE and modulates STIM1 function. METHODS Cytosolic Ca2+ mobilization was estimated in fura-2-loaded cells using an epifluorescence inverted microscope. STIM1 interaction with Orai1, EFHB (EF-hand domain family member B, also known as CFAP21) and SARAF was detected by immunoprecipitation followed by Western blotting using specific antibodies. The involvement of EFHB in the translocation of NFAT to the nucleus was detected by confocal microscopy. RESULTS Here, we report the identification of EFHB as a new SOCE regulator. EFHB interacts with STIM1 upon store depletion and dissociates through a Ca2+-dependent mechanism. RNAi-mediated silencing as well as overexpression studies revealed that EFHB plays a relevant role in the interaction of STIM1 and Orai1 upon store depletion, the activation of SOCE and NFAT translocation from the cytosol to the nucleus. Silencing EFHB expression abolished the dissociation of SARAF from STIM1, which indicates that EFHB might play an important role in the dynamic interaction between both proteins, which is relevant for the activation of Orai1 channels upon Ca2+ store depletion and their subsequent modulation via slow Ca2+-dependent inactivation. CONCLUSION Our results indicate that EFHB is a new SOCE regulator that modulates STIM1-SARAF interaction.
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Affiliation(s)
- Letizia Albarran
- Department of Physiology, (Cellular Physiology and Muscle Physiology Research Groups), Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Jose J Lopez
- Department of Physiology, (Cellular Physiology and Muscle Physiology Research Groups), Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Isaac Jardin
- Department of Physiology, (Cellular Physiology and Muscle Physiology Research Groups), Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres,
| | - Jose Sanchez-Collado
- Department of Physiology, (Cellular Physiology and Muscle Physiology Research Groups), Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Alejandro Berna-Erro
- Department of Physiology, (Cellular Physiology and Muscle Physiology Research Groups), Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Tarik Smani
- Department of Medical Physiology and Biophysic, Institute of Biomedicine of Sevilla, Sevilla, Spain
| | - Pedro J Camello
- Department of Physiology, (Cellular Physiology and Muscle Physiology Research Groups), Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Gines M Salido
- Department of Physiology, (Cellular Physiology and Muscle Physiology Research Groups), Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Juan A Rosado
- Department of Physiology, (Cellular Physiology and Muscle Physiology Research Groups), Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
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Diez-Bello R, Jardin I, Lopez JJ, El Haouari M, Ortega-Vidal J, Altarejos J, Salido GM, Salido S, Rosado JA. (-)‑Oleocanthal inhibits proliferation and migration by modulating Ca 2+ entry through TRPC6 in breast cancer cells. Biochim Biophys Acta Mol Cell Res 2018; 1866:474-485. [PMID: 30321616 DOI: 10.1016/j.bbamcr.2018.10.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 10/08/2018] [Accepted: 10/11/2018] [Indexed: 12/14/2022]
Abstract
Triple negative breast cancer is an aggressive type of cancer that does not respond to hormonal therapy and current therapeutic strategies are accompanied by side effects due to cytotoxic actions on normal tissues. Therefore, there is a need for the identification of anti-cancer compounds with negligible effects on non-tumoral cells. Here we show that (-)‑oleocanthal (OLCT), a phenolic compound isolated from olive oil, selectively impairs MDA-MB-231 cell proliferation and viability without affecting the ability of non-tumoral MCF10A cells to proliferate or their viability. Similarly, OLCT selectively impairs the ability of MDA-MB-231 cells to migrate while the ability of MCF10A to migrate was unaffected. The effect of OLCT was not exclusive for triple negative breast cancer cells as we found that OLCT also attenuate cell viability and proliferation of MCF7 cells. Our results indicate that OLCT is unable to induce Ca2+ mobilization in non-tumoral cells. By contrast, OLCT induces Ca2+ entry in MCF7 and MDA-MB-231 cells, which is impaired by TRPC6 expression silencing. We have found that MDA-MB-231 and MCF7 cells overexpress the channel TRPC6 as compared to non-tumoral MCF10A and treatment with OLCT for 24-72 h downregulates TRPC6 expression in MDA-MB-231 cells. These findings indicate that OLCT impairs the ability of breast cancer cells to proliferate and migrate via downregulation of TRPC6 channel expression while having no effect on the biology of non-tumoral breast cells.
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Affiliation(s)
- R Diez-Bello
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - I Jardin
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - J J Lopez
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - M El Haouari
- Centre Régional des Métiers de l'Education et de la Formation de Taza, 35000 Taza, Morocco; Laboratoire Matériaux, Substances Naturelles, Environnement & Modélisation (LMSNEM), Faculté Polydisciplinaire de Taza, Université Sidi Mohamed Ben Abdellah, Fès, Morocco
| | - J Ortega-Vidal
- Department of Inorganic and Organic Chemistry, University of Jaen, Campus de Excelencia Internacional Agroalimentario (ceiA3), 23071 Jaen, Spain
| | - J Altarejos
- Department of Inorganic and Organic Chemistry, University of Jaen, Campus de Excelencia Internacional Agroalimentario (ceiA3), 23071 Jaen, Spain
| | - G M Salido
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain
| | - S Salido
- Department of Inorganic and Organic Chemistry, University of Jaen, Campus de Excelencia Internacional Agroalimentario (ceiA3), 23071 Jaen, Spain.
| | - J A Rosado
- Department of Physiology (Cellular Physiology Research Group), Institute of Molecular Pathology Biomarkers, University of Extremadura, 10003 Caceres, Spain.
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Ameur FZ, Mehedi N, Kheroua O, Saïdi D, Salido GM, Gonzalez A. Sulfanilic acid increases intracellular free-calcium concentration, induces reactive oxygen species production and impairs trypsin secretion in pancreatic AR42J cells. Food Chem Toxicol 2018; 120:71-80. [DOI: 10.1016/j.fct.2018.07.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 06/09/2018] [Accepted: 07/01/2018] [Indexed: 12/12/2022]
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López E, Gómez-Gordo L, Cantonero C, Bermejo N, Pérez-Gómez J, Granados MP, Salido GM, Rosado Dionisio JA, Redondo Liberal PC. Stanniocalcin 2 Regulates Non-capacitative Ca 2+ Entry and Aggregation in Mouse Platelets. Front Physiol 2018; 9:266. [PMID: 29628897 PMCID: PMC5876523 DOI: 10.3389/fphys.2018.00266] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 03/08/2018] [Indexed: 12/11/2022] Open
Abstract
Stanniocalcin 2 (STC2) is a fish protein that controls body Ca2+ and phosphate metabolism. STC2 has also been described in mammals, and as platelet function highly depends on both extracellular and intracellular Ca2+, we have explored its expression and function in these cells. STC2−/− mice exhibit shorter tail bleeding time than WT mice. Platelets from STC2-deficient mice showed enhanced aggregation, as well as enhanced Ca2+ mobilization in response to the physiological agonist thrombin (Thr) and the diacylglycerol analog, OAG, a selective activator of the non-capacitative Ca2+ entry channels. Interestingly, platelets from STC2−/− mice exhibit attenuated interaction between STIM1 and Orai1 in response to Thr, thus suggesting that STC2 is required for Thr-evoked STIM1-Orai1 interaction and the subsequent store-operated Ca2+ entry (SOCE). We have further assessed possible changes in the expression of the most relevant channels involved in non-capacitative Ca2+ entry in platelets. Then, protein expression of Orai3, TRPC3 and TRPC6 were evaluated by Western blotting, and the results revealed that while the expression of Orai3 was enhanced in the STC2-deficient mice, others like TRPC3 and TRPC6 remains almost unaltered. Summarizing, our results provide for the first time evidence for a role of STC2 in platelet physiology through the regulation of agonist-induced Ca2+ entry, which might be mediated by the regulation of Orai3 channel expression.
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Affiliation(s)
- Esther López
- Department of Physiology (PHYCELL) of the Veterinary Faculty, University of Extremadura, Cáceres, Spain
| | - L Gómez-Gordo
- Department of Animal Medicine, Veterinary Faculty University of Extremadura, Cáceres, Spain
| | - Carlos Cantonero
- Department of Physiology (PHYCELL) of the Veterinary Faculty, University of Extremadura, Cáceres, Spain
| | - Nuria Bermejo
- Hematology Unit, San Pedro de Alcantara Hospital, Cáceres, Spain
| | - Jorge Pérez-Gómez
- Faculty of Sport Sciences, University of Extremadura, Cáceres, Spain
| | - María P Granados
- Aldea Moret Health Center, Extremadura Health Service, Cáceres, Spain
| | - Gines M Salido
- Institute of Molecular Pathology Biomarkers, Cáceres, Spain
| | - Juan A Rosado Dionisio
- Department of Physiology (PHYCELL) of the Veterinary Faculty, University of Extremadura, Cáceres, Spain
| | - Pedro C Redondo Liberal
- Department of Physiology (PHYCELL) of the Veterinary Faculty, University of Extremadura, Cáceres, Spain
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Santofimia-Castaño P, Izquierdo-Alvarez A, Plaza-Davila M, Martinez-Ruiz A, Fernandez-Bermejo M, Mateos-Rodriguez JM, Salido GM, Gonzalez A. Ebselen impairs cellular oxidative state and induces endoplasmic reticulum stress and activation of crucial mitogen-activated protein kinases in pancreatic tumour AR42J cells. J Cell Biochem 2017; 119:1122-1133. [PMID: 28703940 DOI: 10.1002/jcb.26280] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 07/11/2017] [Indexed: 12/25/2022]
Abstract
Ebselen (2-phenyl-1,2-benzisoselenazol-3(2H)-one) is an organoselenium radical scavenger compound, which has strong antioxidant and anti-inflammatory effects. However, evidence suggests that this compound could exert deleterious actions on cell physiology. In this study, we have analyzed the effect of ebselen on rat pancreatic AR42J cells. Cytosolic free-Ca2+ concentration ([Ca2+ ]c ), cellular oxidative status, setting of endoplasmic reticulum stress, and phosphorylation of major mitogen-activated protein kinases were analyzed. Our results show that ebselen evoked a concentration-dependent increase in [Ca2+ ]c . The compound induced an increase in the generation of reactive oxygen species in the mitochondria. We also observed an increase in global cysteine oxidation in the presence of ebselen. In the presence of ebselen an impairment of cholecystokinin-evoked amylase release was noted. Moreover, involvement of the unfolded protein response markers, ER chaperone and signaling regulator GRP78/BiP, eukaryotic translation initiation factor 2α and X-box binding protein 1 was detected. Finally, increases in the phosphorylation of SAPK/JNK, p38 MAPK, and p44/42 MAPK in the presence of ebselen were also observed. Our results provide evidences for an impairment of cellular oxidative state and enzyme secretion, the induction of endoplasmic reticulum stress and the activation of crucial mitogen-activated protein kinases in the presence of ebselen. As a consequence ebselen exerts a potential toxic effect on AR42J cells.
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Affiliation(s)
| | - Alicia Izquierdo-Alvarez
- Servicio de Inmunologia, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain
| | - María Plaza-Davila
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, Caceres, Spain
| | - Antonio Martinez-Ruiz
- Servicio de Inmunologia, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain.,Centro de Investigacion Biomedica en Red de Enfermedades Cardiovasculares (CIBERCV), Spain
| | - Miguel Fernandez-Bermejo
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, Caceres, Spain.,Department of Gastroenterology, San Pedro de Alcantara Hospital, Caceres, Spain
| | | | - Gines M Salido
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, Caceres, Spain
| | - Antonio Gonzalez
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, Caceres, Spain
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Berna-Erro A, Jardin I, Salido GM, Rosado JA. Role of STIM2 in cell function and physiopathology. J Physiol 2017; 595:3111-3128. [PMID: 28087881 DOI: 10.1113/jp273889] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 01/03/2017] [Indexed: 01/01/2023] Open
Abstract
An endoplasmic reticulum (ER)-resident protein that regulates cytosolic and ER free-Ca2+ concentration by induction of store-operated calcium entry: that is the original definition of STIM2 and its function. While its activity strongly depends on the amount of calcium stored in the ER, its function goes further, to intracellular signalling and gene expression. Initially under-studied owing to the prominent function of STIM1, STIM2 came to be regarded as vital in mice, gradually emerging as an important player in the nervous system, and cooperating with STIM1 in the immune system. STIM2 has also been proposed as a relevant player in pathological conditions related to ageing, Alzheimer's and Huntington's diseases, autoimmune disorders and cancer. The discovery of additional functions, together with new splicing forms with opposite roles, has clarified existing controversies about STIM2 function in SOCE. With STIM2 being essential for life, but apparently not for development, newly available data demonstrate a complex and still intriguing behaviour that this review summarizes, updating current knowledge of STIM2 function.
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Affiliation(s)
- Alejandro Berna-Erro
- Laboratory of Molecular Physiology and Channelopathies, Department of Experimental and Health Sciences, Universitat Pompeu Fabra, 08003, Barcelona, Spain
| | - Isaac Jardin
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, 10003, Cáceres, Spain
| | - Gines M Salido
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, 10003, Cáceres, Spain
| | - Juan A Rosado
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, 10003, Cáceres, Spain
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Abstract
Among the Ca2+ entry mechanisms in platelets, store-operated Ca2+ entry (SOCE) plays a prominent role as it is necessary to achieve full activation of platelet functions and replenish intracellular Ca2+ stores. In platelets, as in other non-excitable cells, SOCE has been reported to involve the activation of plasma membrane channels by the ER Ca2+ sensor STIM1. Despite electrophysiological studies are not possible in human platelets, indirect analyses have revealed that the Ca2+-permeable channels involve Orai1 and, most likely, TRPC1 subunits. A relevant role for the latter has not been found in mouse platelets. There is a body of evidence revealing a number of abnormalities in SOCE or in its molecular regulators that result in qualitative platelet disorders and, as a consequence, altered platelet responsiveness upon stimulation with multiple physiological agonists. Platelet SOCE abnormalities include STIM1 and Orai1 mutations. This chapter summarizes the current knowledge in this field, as well as the disorders associated to platelet SOCE dysfunction.
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Affiliation(s)
- Jose J Lopez
- Cell Physiology Research Group, Department of Physiology, University of Extremadura, Cáceres, Spain
| | - Gines M Salido
- Cell Physiology Research Group, Department of Physiology, University of Extremadura, Cáceres, Spain
| | - Juan A Rosado
- Cell Physiology Research Group, Department of Physiology, University of Extremadura, Cáceres, Spain.
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Abstract
The store-operated Ca2+ entry-associated regulatory factor (SARAF), a protein expressed both in the endoplasmic reticulum and the plasma membrane, has been presented as a STIM1-interacting protein with the ability to modulate intracellular Ca2+ homeostasis. SARAF negatively modulates store-operated Ca2+ entry (SOCE) by preventing STIM1 spontaneous activation and regulating STIM1-Orai1 complex formation. In addition, SARAF is a negative regulator of Ca2+ entry through the arachidonate-regulated Ca2+ (ARC) channels. Here we explored the possible role of the surface expression of SARAF on the location of STIM1 in the plasma membrane. In NG115-401L cells, lacking a detectable expression of native STIM1, transfection with pHluorin-STIM1, which is able to translocate to the cell surface, enhances the plasma membrane location of SARAF as compared to cells transfected with YFP-STIM1, lacking the ability to translocate to the cell surface. These findings suggest that the surface location of SARAF is dependent on the expression of STIM1 in the plasma membrane.
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Affiliation(s)
- Letizia Albarran
- a Department of Physiology , Cellular Physiology Research Group, University of Extremadura , Cáceres , Spain
| | - Sergio Regodón
- b Department of Animal Medicine , University of Extremadura , Cáceres , Spain
| | - Gines M Salido
- a Department of Physiology , Cellular Physiology Research Group, University of Extremadura , Cáceres , Spain
| | - Jose J Lopez
- a Department of Physiology , Cellular Physiology Research Group, University of Extremadura , Cáceres , Spain
| | - Juan A Rosado
- a Department of Physiology , Cellular Physiology Research Group, University of Extremadura , Cáceres , Spain
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Lopez JJ, Albarran L, Gómez LJ, Smani T, Salido GM, Rosado JA. Molecular modulators of store-operated calcium entry. Biochim Biophys Acta 2016; 1863:2037-43. [PMID: 27130253 DOI: 10.1016/j.bbamcr.2016.04.024] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 04/13/2016] [Accepted: 04/25/2016] [Indexed: 12/20/2022]
Abstract
Three decades ago, store-operated Ca(2+) entry (SOCE) was identified as a unique mechanism for Ca(2+) entry through plasma membrane (PM) Ca(2+)-permeable channels modulated by the intracellular Ca(2+) stores, mainly the endoplasmic reticulum (ER). Extensive analysis of the communication between the ER and the PM leads to the identification of the protein STIM1 as the ER-Ca(2+) sensor that gates the Ca(2+) channels in the PM. Further analysis on the biophysical, electrophysiological and biochemical properties of STIM1-dependent Ca(2+) channels has revealed the presence of a highly Ca(2+)-selective channel termed Ca(2+) release-activated Ca(2+) channel (CRAC), consisting of Orai1 subunits, and non-selective cation channels named store-operated channels (SOC), including both Orai1 and TRPC channel subunits. Since the identification of the key elements of CRAC and SOC channels a number of intracellular modulators have been reported to play essential roles in the stabilization of STIM-Orai interactions, collaboration with STIM1 conformational changes or mediating slow Ca(2+)-dependent inactivation. Here, we review our current understanding of some of the key modulators of STIM1-Orai1 interaction, including the proteins CRACR2A, STIMATE, SARAF, septins, golli and ORMDL3.
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Affiliation(s)
- Jose J Lopez
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, 10003 Cáceres, Spain
| | - Letizia Albarran
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, 10003 Cáceres, Spain
| | - Luis J Gómez
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, 10003 Cáceres, Spain
| | - Tarik Smani
- Department of Medical Physiology and Biophysic, Institute of Biomedicine of Sevilla, Sevilla, Spain
| | - Gines M Salido
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, 10003 Cáceres, Spain
| | - Juan A Rosado
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, 10003 Cáceres, Spain.
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Albarran L, Lopez JJ, Amor NB, Martin-Cano FE, Berna-Erro A, Smani T, Salido GM, Rosado JA. Dynamic interaction of SARAF with STIM1 and Orai1 to modulate store-operated calcium entry. Sci Rep 2016; 6:24452. [PMID: 27068144 PMCID: PMC4828706 DOI: 10.1038/srep24452] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 03/30/2016] [Indexed: 12/16/2022] Open
Abstract
Ca(2+) influx by store-operated Ca(2+) channels is a major mechanism for intracellular Ca(2+) homeostasis and cellular function. Here we present evidence for the dynamic interaction between the SOCE-associated regulatory factor (SARAF), STIM1 and Orai1. SARAF overexpression attenuated SOCE and the STIM1-Orai1 interaction in cells endogenously expressing STIM1 and Orai1 while RNAi-mediated SARAF silencing induced opposite effects. SARAF impaired the association between Orai1 and the Orai1-activating small fragment of STIM1 co-expressed in the STIM1-deficient NG115-401L cells. Cell treatment with thapsigargin or physiological agonists results in direct association of SARAF with Orai1. STIM1-independent interaction of SARAF with Orai1 leads to activation of this channel. In cells endogenously expressing STIM1 and Orai1, Ca(2+) store depletion leads to dissociation of SARAF with STIM1 approximately 30s after treatment with thapsigargin, which paralleled the increase in SARAF-Orai1 interaction, followed by reinteraction with STIM1 and dissociation from Orai1. Co-expression of SARAF and either Orai1 or various N-terminal deletion Orai1 mutants did not alter SARAF-Orai1 interaction; however, expression of C-terminal deletion Orai1 mutants or blockade of the C-terminus of Orai1 impair the interaction with SARAF. These observations suggest that SARAF exerts an initial positive role in the activation of SOCE followed by the facilitation of SCDI of Orai1.
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Affiliation(s)
- Letizia Albarran
- Department of Physiology (Cellular Physiology and Muscle Physiology Research Groups), University of Extremadura, 10003 Cáceres, Spain
| | - Jose J Lopez
- Department of Physiology (Cellular Physiology and Muscle Physiology Research Groups), University of Extremadura, 10003 Cáceres, Spain
| | - Nidhal Ben Amor
- Department of Physiology (Cellular Physiology and Muscle Physiology Research Groups), University of Extremadura, 10003 Cáceres, Spain
| | - Francisco E Martin-Cano
- Department of Physiology (Cellular Physiology and Muscle Physiology Research Groups), University of Extremadura, 10003 Cáceres, Spain
| | - Alejandro Berna-Erro
- Department of Physiology (Cellular Physiology and Muscle Physiology Research Groups), University of Extremadura, 10003 Cáceres, Spain
| | - Tarik Smani
- Department of Medical Physiology and Biophysics, Institute of Biomedicine of Sevilla, Sevilla, Spain
| | - Gines M Salido
- Department of Physiology (Cellular Physiology and Muscle Physiology Research Groups), University of Extremadura, 10003 Cáceres, Spain
| | - Juan A Rosado
- Department of Physiology (Cellular Physiology and Muscle Physiology Research Groups), University of Extremadura, 10003 Cáceres, Spain
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Albarran L, Lopez JJ, Woodard GE, Salido GM, Rosado JA. Store-operated Ca2+ Entry-associated Regulatory factor (SARAF) Plays an Important Role in the Regulation of Arachidonate-regulated Ca2+ (ARC) Channels. J Biol Chem 2016; 291:6982-8. [PMID: 26817842 DOI: 10.1074/jbc.m115.704940] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Indexed: 01/15/2023] Open
Abstract
The store-operated Ca(2+)entry-associated regulatory factor (SARAF) has recently been identified as a STIM1 regulatory protein that facilitates slow Ca(2+)-dependent inactivation of store-operated Ca(2+)entry (SOCE). Both the store-operated channels and the store-independent arachidonate-regulated Ca(2+)(ARC) channels are regulated by STIM1. In the present study, we show that, in addition to its location in the endoplasmic reticulum, SARAF is constitutively expressed in the plasma membrane, where it can interact with plasma membrane (PM)-resident ARC forming subunits in the neuroblastoma cell line SH-SY5Y. Using siRNA-based and overexpression approaches we report that SARAF negatively regulates store-independent Ca(2+)entry via the ARC channels. Arachidonic acid (AA) increases the association of PM-resident SARAF with Orai1. Finally, our results indicate that SARAF modulates the ability of AA to promote cell survival in neuroblastoma cells. In addition to revealing new insight into the biology of ARC channels in neuroblastoma cells, these findings provide evidence for an unprecedented location of SARAF in the plasma membrane.
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Affiliation(s)
- Letizia Albarran
- From the Department of Physiology (Cellular Physiology Research Group), University of Extremadura, 10003 Caceres, Spain and
| | - Jose J Lopez
- From the Department of Physiology (Cellular Physiology Research Group), University of Extremadura, 10003 Caceres, Spain and
| | - Geoffrey E Woodard
- Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, Maryland
| | - Gines M Salido
- From the Department of Physiology (Cellular Physiology Research Group), University of Extremadura, 10003 Caceres, Spain and
| | - Juan A Rosado
- From the Department of Physiology (Cellular Physiology Research Group), University of Extremadura, 10003 Caceres, Spain and
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Santofimia-Castaño P, Clea Ruy D, Garcia-Sanchez L, Jimenez-Blasco D, Fernandez-Bermejo M, Bolaños JP, Salido GM, Gonzalez A. Melatonin induces the expression of Nrf2-regulated antioxidant enzymes via PKC and Ca2+ influx activation in mouse pancreatic acinar cells. Free Radic Biol Med 2015; 87:226-36. [PMID: 26163001 DOI: 10.1016/j.freeradbiomed.2015.06.033] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Revised: 05/24/2015] [Accepted: 06/23/2015] [Indexed: 12/12/2022]
Abstract
The goal of this study was to evaluate the potential activation of the nuclear factor erythroid 2-related factor and the antioxidant-responsive element (Nrf2-ARE) signaling pathway in response to melatonin in isolated mouse pancreatic acinar cells. Changes in intracellular free Ca(2+) concentration were followed by fluorimetric analysis of fura-2-loaded cells. The activations of PKC and JNK were measured by Western blot analysis. Quantitative reverse transcription-polymerase chain reaction was employed to detect the expression of Nrf2-regulated antioxidant enzymes. Immunocytochemistry was employed to determine nuclear location of phosphorylated Nrf2, and the cellular redox state was monitored following MitoSOX Red-derived fluorescence. Our results show that stimulation of fura-2-loaded cells with melatonin (1 µM to 1 mM), in the presence of Ca(2+) in the extracellular medium, induced a slow and progressive increase of [Ca(2+)](c) toward a stable level. Melatonin did not inhibit the typical Ca(2+) response induced by CCK-8 (1 nM). When the cells were challenged with indoleamine in the absence of Ca(2+) in the extracellular solution (medium containing 0.5 mM EGTA) or in the presence of 1 mM LaCl(3), to inhibit Ca(2+) entry, we could not detect any change in [Ca(2+)](c). Nevertheless, CCK-8 (1 nM) was able to induce the typical mobilization of Ca(2+). When the cells were incubated with the PKC activator PMA (1 µM) in the presence of Ca(2+) in the extracellular medium, we observed a response similar to that noted when the cells were challenged with melatonin 100 µM. However, in the presence of Ro31-8220 (3 µM), a PKC inhibitor, stimulation of cells with melatonin failed to evoke changes in [Ca(2+)]c. Immunoblots, using an antibody specific for phospho-PKC, revealed that melatonin induces PKCα activation, either in the presence or in the absence of external Ca(2+). Melatonin induced the phosphorylation and nuclear translocation of the transcription factor Nrf2, and evoked a concentration-dependent increase in the expression of the antioxidant enzymes NAD(P)H-quinone oxidoreductase 1, catalytic subunit of glutamate-cysteine ligase, and heme oxygenase-1. Incubation of MitoSOX Red-loaded pancreatic acinar cells in the presence of 1 nM CCK-8 induced a statistically significant increase in dye-derived fluorescence, reflecting an increase in oxidation, that was abolished by pretreatment of cells with melatonin (100 µM) or PMA (1 µM). On the contrary, pretreatment with Ro31-8220 (3 µM) blocked the effect of melatonin on CCK-8-induced increase in oxidation. Finally, phosphorylation of JNK in the presence of CCK-8 or melatonin was also observed. We conclude that melatonin, via modulation of PKC and Ca(2+) signaling, could potentially stimulate the Nrf2-mediated antioxidant response in mouse pancreatic acinar cells.
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Affiliation(s)
| | - Deborah Clea Ruy
- Facultade de Agronomia & Medicina Veterinaria, Universidade de Brasilia, 70900-100, Brasilia DF, Brazil
| | - Lourdes Garcia-Sanchez
- Cell Physiology Research Group (FICEL), Department of Physiology, University of Extremadura, Caceres, Spain
| | - Daniel Jimenez-Blasco
- Institute of Functional Biology and Genomics (IBFG), University of Salamanca-CSIC, Salamanca, Spain
| | - Miguel Fernandez-Bermejo
- Cell Physiology Research Group (FICEL), Department of Physiology, University of Extremadura, Caceres, Spain; Department of Gastroenterology, San Pedro de Alcantara Hospital, E-10003 Caceres, Spain
| | - Juan P Bolaños
- Institute of Functional Biology and Genomics (IBFG), University of Salamanca-CSIC, Salamanca, Spain
| | - Gines M Salido
- Cell Physiology Research Group (FICEL), Department of Physiology, University of Extremadura, Caceres, Spain
| | - Antonio Gonzalez
- Cell Physiology Research Group (FICEL), Department of Physiology, University of Extremadura, Caceres, Spain.
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Lopez E, Bermejo N, Berna-Erro A, Alonso N, Salido GM, Redondo PC, Rosado JA. Relationship between calcium mobilization and platelet α- and δ-granule secretion. A role for TRPC6 in thrombin-evoked δ-granule exocytosis. Arch Biochem Biophys 2015; 585:75-81. [PMID: 26386308 DOI: 10.1016/j.abb.2015.09.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 09/14/2015] [Accepted: 09/15/2015] [Indexed: 11/25/2022]
Abstract
Changes in cytosolic Ca(2+) concentration ([Ca(2+)]c) regulate granule secretion in different cell types. Thrombin activates PAR1 and PAR4 receptors and promotes release of Ca(2+) from distinct intracellular stores, which, in turn, activates store-operated Ca(2+) entry (SOCE). A crucial step during platelet function is the release of physiological agonists stored in secretory granules to the extracellular compartment during activation. We aim to study the role of Ca(2+) mobilization from the extracellular compartment or from different intracellular stores in platelet granule secretion. By using flow cytometry, we have found that α- and δ-granules are secreted in thrombin-stimulated platelets in the absence of extracellular Ca(2+), and in a concentration-dependent manner. Our findings show that thrombin-stimulated granule secretion depends on Ca(2+) mobilization from intracellular stores. Analysis of the kinetics of granule secretion reveals that platelet stimulation with thrombin results in rapid release of α-granules which precedes the secretion of δ-granules. Incubation of platelets with a specific antibody, which recognizes the extracellular amino acid sequence 573-586 of TRPC6, inhibited thrombin-evoked δ-granule exocytosis. Our results indicate that the mechanisms underlying thrombin-induced α- and δ-granule secretion show differences in dependency on Ca(2+) mobilization.
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Affiliation(s)
- E Lopez
- Department of Physiology, University of Extremadura, Phycell, 10003, Spain
| | - N Bermejo
- Department of Hematology, Hospital San Pedro de Alcantara, 10003 Cáceres, Spain
| | - A Berna-Erro
- Department of Physiology, University of Extremadura, Phycell, 10003, Spain
| | - N Alonso
- Department of Hematology, Hospital Infanta Cristina, 06006 Badajoz, Spain
| | - G M Salido
- Department of Physiology, University of Extremadura, Phycell, 10003, Spain
| | - P C Redondo
- Department of Physiology, University of Extremadura, Phycell, 10003, Spain
| | - J A Rosado
- Department of Physiology, University of Extremadura, Phycell, 10003, Spain.
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Lopez E, Berna-Erro A, Salido GM, Rosado JA, Redondo PC. FKBP25 and FKBP38 regulate non-capacitative calcium entry through TRPC6. Biochim Biophys Acta 2015; 1853:2684-96. [PMID: 26239116 DOI: 10.1016/j.bbamcr.2015.07.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 07/27/2015] [Accepted: 07/30/2015] [Indexed: 10/23/2022]
Abstract
Non-capacitative calcium entry (NCCE) contributes to cell activation in response to the occupation of G protein-coupled membrane receptors. Thrombin administration to platelets evokes the synthesis of diacylglycerol downstream of PAR receptor activation. Diacylglycerol evokes NCCE through activating TRPC3 and TRPC6 in human platelets. Although it is known that immunophilins interact with TRPCs, the role of immunophilins in the regulation of NCCE remains unknown. Platelet incubation with FK506, an immunophilin antagonist, reduced OAG-evoked NCCE in a concentration-dependent manner, an effect that was independent on the inactivation of calcineurin (CaN). FK506 was unable to reduce NCCE evoked by OAG in platelets from TRPC6-/- mice. In HEK-293 cells overexpressing TRPC6, currents through TRPC6 were altered in the presence of FK506. We have found interaction between FKBP38 and other FKBPs, like FKBP25, FKBP12, and FKBP52 that were not affected by FK506, as well as with calmodulin (CaM). FK506 modified the pattern of association between FKBP25 and TRPCs as well as impaired OAG-evoked TRPC3 and TRPC6 coupling in both human and mouse platelets. By performing biotinylation experiments we have elucidated that FKBP25 and FKBP38 might be found at different cellular location, the plasma membrane and the already described intracellular locations. Finally, FKBP25 and FKBP38 silencing significantly inhibits OAG-evoked NCCE in MEG-01 and HEK293 cells, while overexpression of FKBP38 does not modify NCCE in HEK293 cells. All together, these findings provide strong evidence for a role of immunophilins, including FKBP25 and FKBP38, in NCCE mediated by TRPC6.
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Affiliation(s)
- Esther Lopez
- Department of Physiology, Cell Physiology Research Group, University of Extremadura, 10003 Cáceres, Spain
| | - Alejandro Berna-Erro
- Department of Physiology, Cell Physiology Research Group, University of Extremadura, 10003 Cáceres, Spain
| | - Gines M Salido
- Department of Physiology, Cell Physiology Research Group, University of Extremadura, 10003 Cáceres, Spain
| | - Juan A Rosado
- Department of Physiology, Cell Physiology Research Group, University of Extremadura, 10003 Cáceres, Spain
| | - Pedro C Redondo
- Department of Physiology, Cell Physiology Research Group, University of Extremadura, 10003 Cáceres, Spain.
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Santofimia-Castaño P, Salido GM, Gonzalez A. Interferences of resveratrol with fura-2-derived fluorescence in intracellular free-Ca(2+) concentration determinations. Cytotechnology 2015; 68:1369-80. [PMID: 26091617 DOI: 10.1007/s10616-015-9898-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 06/15/2015] [Indexed: 01/09/2023] Open
Abstract
Resveratrol (3,4',5-trihydroxy-trans-stilbene) is an antioxidant widely employed in cell physiology studies. It has been reported that it interferes with fura-2-derived fluorescence, making the employment of this dye nonviable. In this work, the interference of resveratrol with fura-2 determinations of intracellular free-Ca(2+) concentration ([Ca(2+)]c) was examined. Solutions containing different concentrations of resveratrol, with or without fura-2, in the presence or in the absence of Ca(2+), were analyzed by spectrofluorimetry. AR42J tumor cells were employed to study the influence of resveratrol on fura-2 fluorescence in living cells, by single cell fluorimetry. Resveratrol impaired the detection of fura-2-fluorescence emission (510 nm) at the 340, 360 and 380 nm excitation wavelengths. Resveratrol emitted fluorescence at 510 nm when lighted at all three excitation wavelengths. In addition, resveratrol emitted fluorescence at 380 nm when excited at 340 nm. Our observations suggest that the employment of the ratiometric properties of fura-2 to follow changes in [Ca(2+)]c in the presence of resveratrol is not viable. However, we think that the 380 nm excitation light could be employed. Results could be expressed as F0/F380, where F0 is the resting fluorescence and F380 is the value of fluoresce at a certain time point. We could follow changes in [Ca(2+)]c evoked by CCK-8, and we also detected Ca(2+) mobilization by 100 µM resveratrol in AR42J cells. This investigation presents evidence demonstrating that resveratrol interferes with fura-2 fluorescence spectra. Nevertheless, a chance still exists if the 380 nm excitation wavelength is employed in the middle or low micromolar concentrations of resveratrol.
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Affiliation(s)
- Patricia Santofimia-Castaño
- Cell Physiology Research Group, Department of Physiology, University of Extremadura, Avenida Universidad s/n, 10003, Cáceres, Spain
| | - Gines M Salido
- Cell Physiology Research Group, Department of Physiology, University of Extremadura, Avenida Universidad s/n, 10003, Cáceres, Spain
| | - Antonio Gonzalez
- Cell Physiology Research Group, Department of Physiology, University of Extremadura, Avenida Universidad s/n, 10003, Cáceres, Spain.
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Santofimia-Castaño P, Garcia-Sanchez L, Ruy DC, Sanchez-Correa B, Fernandez-Bermejo M, Tarazona R, Salido GM, Gonzalez A. Melatonin induces calcium mobilization and influences cell proliferation independently of MT1/MT2 receptor activation in rat pancreatic stellate cells. Cell Biol Toxicol 2015; 31:95-110. [DOI: 10.1007/s10565-015-9297-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 02/26/2015] [Indexed: 01/09/2023]
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Woodard GE, Jardín I, Berna-Erro A, Salido GM, Rosado JA. Regulators of G-protein-signaling proteins: negative modulators of G-protein-coupled receptor signaling. Int Rev Cell Mol Biol 2015; 317:97-183. [PMID: 26008785 DOI: 10.1016/bs.ircmb.2015.02.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Regulators of G-protein-signaling (RGS) proteins are a category of intracellular proteins that have an inhibitory effect on the intracellular signaling produced by G-protein-coupled receptors (GPCRs). RGS along with RGS-like proteins switch on through direct contact G-alpha subunits providing a variety of intracellular functions through intracellular signaling. RGS proteins have a common RGS domain that binds to G alpha. RGS proteins accelerate GTPase and thus enhance guanosine triphosphate hydrolysis through the alpha subunit of heterotrimeric G proteins. As a result, they inactivate the G protein and quickly turn off GPCR signaling thus terminating the resulting downstream signals. Activity and subcellular localization of RGS proteins can be changed through covalent molecular changes to the enzyme, differential gene splicing, and processing of the protein. Other roles of RGS proteins have shown them to not be solely committed to being inhibitors but behave more as modulators and integrators of signaling. RGS proteins modulate the duration and kinetics of slow calcium oscillations and rapid phototransduction and ion signaling events. In other cases, RGS proteins integrate G proteins with signaling pathways linked to such diverse cellular responses as cell growth and differentiation, cell motility, and intracellular trafficking. Human and animal studies have revealed that RGS proteins play a vital role in physiology and can be ideal targets for diseases such as those related to addiction where receptor signaling seems continuously switched on.
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Affiliation(s)
- Geoffrey E Woodard
- Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD, USA; Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Isaac Jardín
- Department of Physiology, University of Extremadura, Caceres, Spain
| | - A Berna-Erro
- Department of Physiology, University of Extremadura, Caceres, Spain
| | - Gines M Salido
- Department of Physiology, University of Extremadura, Caceres, Spain
| | - Juan A Rosado
- Department of Physiology, University of Extremadura, Caceres, Spain
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Albarran L, Berna-Erro A, Dionisio N, Redondo PC, Lopez E, Lopez JJ, Salido GM, Brull Sabate JM, Rosado JA. TRPC6 participates in the regulation of cytosolic basal calcium concentration in murine resting platelets. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research 2014; 1843:789-96. [DOI: 10.1016/j.bbamcr.2014.01.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 01/12/2014] [Accepted: 01/13/2014] [Indexed: 10/25/2022]
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Jardín I, Dionisio N, Lopez JJ, Salido GM, Rosado JA. Pharmacology of TRP channels in the vasculature. Curr Vasc Pharmacol 2014; 11:480-9. [PMID: 23905642 DOI: 10.2174/1570161111311040011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 01/29/2013] [Accepted: 02/13/2013] [Indexed: 11/22/2022]
Abstract
The TRP family of cation-permeable channels owes its name to a Drosophila TRP mutant with impaired vision due to transient rather than sustained receptor potential. Mammalian TRP channels can be grouped into 6 subfamilies, including TRPC, TRPM, TRPV, TRPA, TRPP and TRPML and a number of TRP family members have been identified in the vasculature. TRP channels play an important functional role in the vasculature as mediators of cation influx across the plasma membrane, thus contributing to a large number of processes such as vascular smooth muscle contraction and vascular pressure or the responses to oxidative stress, mechanical stimuli, heat and hypoxia-induced vascular remodelling. TRP channelopaties are involved in the pathogenesis of different disorders including hypertension and cardiomyopathy. A number of identified natural compounds and synthetic agents have been reported to modulate TRP function, and are the base for therapeutical strategies.
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Affiliation(s)
- Isaac Jardín
- Department of Physiology, Cell Physiology Research Group, University of Extremadura, 10003, Cáceres, Spain
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Berna-Erro A, Albarran L, Dionisio N, Redondo PC, Alonso N, Gomez LJ, Salido GM, Rosado JA. The canonical transient receptor potential 6 (TRPC6) channel is sensitive to extracellular pH in mouse platelets. Blood Cells Mol Dis 2014; 52:108-15. [DOI: 10.1016/j.bcmd.2013.08.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Accepted: 08/20/2013] [Indexed: 01/12/2023]
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López E, Berna-Erro A, Hernández-Cruz JM, Salido GM, Redondo PC, Rosado JA. Immunophilins are involved in the altered platelet aggregation observed in patients with type 2 diabetes mellitus. Curr Med Chem 2014; 20:1912-21. [PMID: 23432586 DOI: 10.2174/0929867311320140008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 01/22/2013] [Accepted: 01/30/2013] [Indexed: 11/22/2022]
Abstract
UNLABELLED Platelet hyperaggregability might contribute to vascular complications associated with type 2 diabetes mellitus (DM2).Experimental evidence supports a direct link between altered Ca(2+) entry and hyperaggregability in DM2 patients. OBJECTIVES We aimed to investigate whether altered immunophilin expression and function are involved in the abnormal Ca(2+) entry observed in platelets from DM2 patients. RESULTS Inhibition of immunophilins by tacrolimus (FK506) and sirolimus (rapamycin) reduced Ca(2+) entry in platelets from healthy donors and DM2 patients. Similarly, immunophilin inhibitors reduced platelet degranulation in both healthy and DM2 subjects. Nevertheless, α-granule secretion reduction was greater than that observed for dense granules in platelets from DM2 patients. However, no difference was observed in the inhibition of secretion in platelets from healthy subjects. Additionally, altered expression of FK506 binding protein-52 (FKBP52) and coupling to Ca(2+) channels were found in platelets from DM2 patients compared to healthy subjects. Finally, reduction in platelet function from healthy subjects and DM2 patients in the presence of immunophilin antagonists was observed, being this dysfunction more evident in platelets from DM2 patients. CONCLUSIONS We suggest that, among others, FKBP52 expression and function are altered in platelets from DM2 patients, contributing to the altered Ca(2+) entry and hyperaggregability in these cells.
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Affiliation(s)
- E López
- Department of Physiology (Phycell group), University of Extremadura, 10003-Cáceres, Spain
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Caselles AB, Miro-Moran A, Morillo Rodriguez A, Gallardo Bolaños JM, Ortega-Ferrusola C, Salido GM, Peña FJ, Tapia JA, Aparicio IM. Identification of Apoptotic Bodies in Equine Semen. Reprod Domest Anim 2014; 49:254-62. [DOI: 10.1111/rda.12264] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Accepted: 11/10/2013] [Indexed: 01/28/2023]
Affiliation(s)
- AB Caselles
- Cell Physiology Research Group; Department of Physiology; University of Extremadura; Caceres Spain
| | - A Miro-Moran
- Cell Physiology Research Group; Department of Physiology; University of Extremadura; Caceres Spain
| | - A Morillo Rodriguez
- Veterinary Teaching Hospital; Laboratory of Spermatology; University of Extremadura; Caceres Spain
| | - JM Gallardo Bolaños
- Veterinary Teaching Hospital; Laboratory of Spermatology; University of Extremadura; Caceres Spain
| | - C Ortega-Ferrusola
- Veterinary Teaching Hospital; Laboratory of Spermatology; University of Extremadura; Caceres Spain
| | - GM Salido
- Cell Physiology Research Group; Department of Physiology; University of Extremadura; Caceres Spain
| | - FJ Peña
- Veterinary Teaching Hospital; Laboratory of Spermatology; University of Extremadura; Caceres Spain
| | - JA Tapia
- Cell Physiology Research Group; Department of Physiology; University of Extremadura; Caceres Spain
| | - IM Aparicio
- Cell Physiology Research Group; Department of Physiology; University of Extremadura; Caceres Spain
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Albarrán L, Lopez JJ, Dionisio N, Smani T, Salido GM, Rosado JA. Transient receptor potential ankyrin-1 (TRPA1) modulates store-operated Ca 2+ entry by regulation of STIM1-Orai1 association. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research 2013; 1833:3025-3034. [DOI: 10.1016/j.bbamcr.2013.08.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 08/13/2013] [Accepted: 08/14/2013] [Indexed: 01/06/2023]
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Berna-Erro A, Galan C, Dionisio N, Gomez LJ, Salido GM, Rosado JA. Capacitative and non-capacitative signaling complexes in human platelets. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research 2012; 1823:1242-51. [DOI: 10.1016/j.bbamcr.2012.05.023] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Revised: 05/18/2012] [Accepted: 05/21/2012] [Indexed: 11/25/2022]
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Tapia JA, Macias-Garcia B, Miro-Moran A, Ortega-Ferrusola C, Salido GM, Peña FJ, Aparicio IM. The Membrane of the Mammalian Spermatozoa: Much More Than an Inert Envelope. Reprod Domest Anim 2012; 47 Suppl 3:65-75. [DOI: 10.1111/j.1439-0531.2012.02046.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Miro-Moran A, Jardin I, Ortega-Ferrusola C, Salido GM, Peña FJ, Tapia JA, Aparicio IM. Identification and function of exchange proteins activated directly by cyclic AMP (Epac) in mammalian spermatozoa. PLoS One 2012; 7:e37713. [PMID: 22662198 PMCID: PMC3360633 DOI: 10.1371/journal.pone.0037713] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2011] [Accepted: 04/23/2012] [Indexed: 12/13/2022] Open
Abstract
The role of cAMP in spermatic functions was classically thought to be mediated exclusively through the activation of Protein Kinase A (PKA). However, it has recently been shown that cAMP also exerts its effects through a PKA-independent pathway activating a family of proteins known as Epac proteins. Therefore, many of the spermatic functions thought to be regulated by cAMP through the activation of PKA are again under study. We aimed to identify and to investigate the role of Epac proteins in spermatozoa using a specific permeable analog (8-Br-2′-O-Me-cAMP). Also, we aimed to study its relationship with E-cadherin, an adhesion protein involved in fertility. Our results demonstrate the presence and sub-cellular distribution of Epac 1 and Epac 2 in mammalian spermatozoa. Capacitation and the acrosome reaction induced a change in the localization of Epac proteins in sperm. Moreover, incubation with 8-Br-2′-O-Me-cAMP prompted an increase in Rap1 activation, in the scrambling of plasma membrane phospholipids (necessary for the capacitation process), the acrosome reaction, motility, and calcium mobilization, when spermatozoa were incubated in acrosome reaction conditions. Finally, the activation of Epac proteins induced a change in the distribution of E-cadherin. Therefore, the increase in the acrosome reaction, together with the increase in calcium (which is known to be essential for fertilization) and the Epac nteraction with E-cadherin, might indicate that Epac proteins have an important role in gamete recognition and fertilization.
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Affiliation(s)
- Alvaro Miro-Moran
- Cell Physiology Research Group, University of Extremadura, Caceres, Spain
| | - Isaac Jardin
- Cell Physiology Research Group, University of Extremadura, Caceres, Spain
| | | | - Gines M. Salido
- Cell Physiology Research Group, University of Extremadura, Caceres, Spain
| | - Fernando J. Peña
- Laboratory of Spermatology, Veterinary Teaching Hospital, University of Extremadura, Caceres, Spain
| | - Jose A. Tapia
- Cell Physiology Research Group, University of Extremadura, Caceres, Spain
| | - Ines M. Aparicio
- Cell Physiology Research Group, University of Extremadura, Caceres, Spain
- * E-mail:
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Gonzalez A, Santofimia-Castaño P, Rivera-Barreno R, Salido GM. Cinnamtannin B-1, a natural antioxidant that reduces the effects of H(2)O(2) on CCK-8-evoked responses in mouse pancreatic acinar cells. J Physiol Biochem 2011; 68:181-91. [PMID: 22120978 DOI: 10.1007/s13105-011-0130-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Accepted: 11/07/2011] [Indexed: 01/12/2023]
Abstract
This work was designed in order to gain an insight on the mechanisms by which antioxidants prevent pancreatic disorders. We have examined the properties of cinnamtannin B-1, which belongs to the class of polyphenols, against the effect of hydrogen peroxide (H(2)O(2)) in mouse pancreatic acinar cells. We have studied Ca(2+) mobilization, oxidative state, amylase secretion, and cell viability of cells treated with cinnamtannin B-1 in the presence of various concentrations of H(2)O(2). We found that H(2)O(2) (0.1-100 μM) increased CM-H(2)DCFDA-derived fluorescence, reflecting an increase in oxidation. Cinnamtannin B-1 (10 μM) reduced H(2)O(2)-induced oxidation of CM-H(2)DCFDA. CCK-8 induced oxidation of CM-H(2)DCFDA in a similar way to low micromolar concentrations of H(2)O(2), and cinnamtannin B-1 reduced the oxidant effect of CCK-8. In addition, H(2)O(2) induced a slow and progressive increase in intracellular free Ca(2+) concentration ([Ca(2+)](c)). Cinnamtannin B-1 reduced the effect of H(2)O(2) on [Ca(2+)](c), but only at the lower concentrations of the oxidant. H(2)O(2) inhibited amylase secretion in response to cholecystokinin, and cinnamtannin B-1 reduced the inhibitory action of H(2)O(2) on enzyme secretion. Finally, H(2)O(2) reduced cell viability, and the antioxidant protected acinar cells against H(2)O(2). In conclusion, the beneficial effects of cinnamtannin B-1 appear to be mediated by reducing the intracellular Ca(2+) overload and intracellular accumulation of digestive enzymes evoked by ROS, which is a common pathological precursor that mediates pancreatitis. Our results support the beneficial effect of natural antioxidants in the therapy against oxidative stress-derived deleterious effects on cellular physiology.
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Affiliation(s)
- Antonio Gonzalez
- Department of Physiology (Cell Physiology Research Group), University of Extremadura, Caceres, Spain.
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