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Naffa R, Hegedűs L, Hegedűs T, Tóth S, Papp B, Tordai A, Enyedi Á. Plasma membrane Ca 2+ pump isoform 4 function in cell migration and cancer metastasis. J Physiol 2024; 602:1551-1564. [PMID: 36876504 DOI: 10.1113/jp284179] [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: 12/12/2022] [Accepted: 03/02/2023] [Indexed: 03/07/2023] Open
Abstract
The Ca2+ ion is a universal second messenger involved in many vital physiological functions including cell migration and development. To fulfil these tasks the cytosolic Ca2+ concentration is tightly controlled, and this involves an intricate functional balance between a variety of channels and pumps of the Ca2+ signalling machinery. Among these proteins, plasma membrane Ca2+ ATPases (PMCAs) represent the major high-affinity Ca2+ extrusion systems in the cell membrane that are effective in maintaining free Ca2+ concentration at exceedingly low cytosolic levels, which is essential for normal cell function. An imbalance in Ca2+ signalling can have pathogenic consequences including cancer and metastasis. Recent studies have highlighted the role of PMCAs in cancer progression and have shown that a particular variant, PMCA4b, is downregulated in certain cancer types, causing delayed attenuation of the Ca2+ signal. It has also been shown that loss of PMCA4b leads to increased migration and metastasis of melanoma and gastric cancer cells. In contrast, an increased PMCA4 expression has been reported in pancreatic ductal adenocarcinoma that coincided with increased cell migration and shorter patient survival, suggesting distinct roles of PMCA4b in various tumour types and/or different stages of tumour development. The recently discovered interaction of PMCAs with basigin, an extracellular matrix metalloproteinase inducer, may provide further insights into our understanding of the specific roles of PMCA4b in tumour progression and cancer metastasis.
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Affiliation(s)
- Randa Naffa
- Molecular Biology Research Laboratory, School of Medicine, The University of Jordan, Amman, Jordan
| | - Luca Hegedűs
- Department of Thoracic Surgery, Ruhrlandklinik, University Clinic Essen, Essen, Germany
| | - Tamás Hegedűs
- Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
- ELKH-SE Biophysical Virology Research Group, Eötvös Loránd Research Network, Budapest, Hungary
| | - Sarolta Tóth
- Department of Transfusion Medicine, Semmelweis University, Budapest, Hungary
| | - Béla Papp
- Institut National de la Santé et de la Recherche Médicale, Institut de Recherche Saint-Louis, Hôpital Saint-Louis, Paris, France
- Institut de Recherche Saint-Louis, Hôpital Saint-Louis, Université de Paris, Paris, France
- CEA, DRF-Institut Francois Jacob, Department of Hemato-Immunology Research, Hôpital Saint-Louis, Paris, France
| | - Attila Tordai
- Department of Transfusion Medicine, Semmelweis University, Budapest, Hungary
| | - Ágnes Enyedi
- ELKH-SE Biophysical Virology Research Group, Eötvös Loránd Research Network, Budapest, Hungary
- Department of Transfusion Medicine, Semmelweis University, Budapest, Hungary
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Hegedüs L, Livingstone E, Bánkfalvi Á, Viehof J, Enyedi Á, Bilecz Á, Győrffy B, Baranyi M, Tőkés AM, Gil J, Marko-Varga G, Griewank KG, Zimmer L, Váraljai R, Sucker A, Zaremba A, Schadendorf D, Aigner C, Hegedüs B. The Prognostic Relevance of PMCA4 Expression in Melanoma: Gender Specificity and Implications for Immune Checkpoint Inhibition. Int J Mol Sci 2022; 23:3324. [PMID: 35328746 PMCID: PMC8949876 DOI: 10.3390/ijms23063324] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 11/30/2022] Open
Abstract
PMCA4 is a critical regulator of Ca2+ homeostasis in mammalian cells. While its biological and prognostic relevance in several cancer types has already been demonstrated, only preclinical investigations suggested a metastasis suppressor function in melanoma. Therefore, we studied the expression pattern of PMCA4 in human skin, nevus, as well as in primary and metastatic melanoma using immunohistochemistry. Furthermore, we analyzed the prognostic power of PMCA4 mRNA levels in cutaneous melanoma both at the non-metastatic stage as well as after PD-1 blockade in advanced disease. PMCA4 localizes to the plasma membrane in a differentiation dependent manner in human skin and mucosa, while nevus cells showed no plasma membrane staining. In contrast, primary cutaneous, choroidal and conjunctival melanoma cells showed specific plasma membrane localization of PMCA4 with a wide range of intensities. Analyzing the TCGA cohort, PMCA4 mRNA levels showed a gender specific prognostic impact in stage I-III melanoma. Female patients with high transcript levels had a significantly longer progression-free survival. Melanoma cell specific PMCA4 protein expression is associated with anaplasticity in melanoma lung metastasis but had no impact on survival after lung metastasectomy. Importantly, high PMCA4 transcript levels derived from RNA-seq of cutaneous melanoma are associated with significantly longer overall survival after PD-1 blockade. In summary, we demonstrated that human melanoma cells express PMCA4 and PMCA4 transcript levels carry prognostic information in a gender specific manner.
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Affiliation(s)
- Luca Hegedüs
- Department of Thoracic Surgery, University Medicine Essen–Ruhrlandklinik, 45239 Essen, Germany; (L.H.); (J.V.); (C.A.)
| | - Elisabeth Livingstone
- Department of Dermatology, University Medicine Essen, 45147 Essen, Germany; (E.L.); (K.G.G.); (L.Z.); (R.V.); (A.S.); (A.Z.); (D.S.)
| | - Ágnes Bánkfalvi
- Department of Pathology, University Medicine Essen, 45147 Essen, Germany;
| | - Jan Viehof
- Department of Thoracic Surgery, University Medicine Essen–Ruhrlandklinik, 45239 Essen, Germany; (L.H.); (J.V.); (C.A.)
| | - Ágnes Enyedi
- Department of Transfusiology, Semmelweis University, 1085 Budapest, Hungary;
| | - Ágnes Bilecz
- 2nd Department of Pathology, Semmelweis University, 1085 Budapest, Hungary; (Á.B.); (M.B.); (A.-M.T.)
| | - Balázs Győrffy
- Department of Bioinformatics, Semmelweis University, 1085 Budapest, Hungary;
| | - Marcell Baranyi
- 2nd Department of Pathology, Semmelweis University, 1085 Budapest, Hungary; (Á.B.); (M.B.); (A.-M.T.)
| | - Anna-Mária Tőkés
- 2nd Department of Pathology, Semmelweis University, 1085 Budapest, Hungary; (Á.B.); (M.B.); (A.-M.T.)
| | - Jeovanis Gil
- Division of Oncology, Department of Clinical Sciences Lund, Lund University, 221 00 Lund, Sweden;
| | - György Marko-Varga
- Clinical Protein Science & Imaging, Biomedical Centre, Department of Biomedical Engineering, Lund University, 221 00 Lund, Sweden;
| | - Klaus G. Griewank
- Department of Dermatology, University Medicine Essen, 45147 Essen, Germany; (E.L.); (K.G.G.); (L.Z.); (R.V.); (A.S.); (A.Z.); (D.S.)
| | - Lisa Zimmer
- Department of Dermatology, University Medicine Essen, 45147 Essen, Germany; (E.L.); (K.G.G.); (L.Z.); (R.V.); (A.S.); (A.Z.); (D.S.)
| | - Renáta Váraljai
- Department of Dermatology, University Medicine Essen, 45147 Essen, Germany; (E.L.); (K.G.G.); (L.Z.); (R.V.); (A.S.); (A.Z.); (D.S.)
| | - Antje Sucker
- Department of Dermatology, University Medicine Essen, 45147 Essen, Germany; (E.L.); (K.G.G.); (L.Z.); (R.V.); (A.S.); (A.Z.); (D.S.)
| | - Anne Zaremba
- Department of Dermatology, University Medicine Essen, 45147 Essen, Germany; (E.L.); (K.G.G.); (L.Z.); (R.V.); (A.S.); (A.Z.); (D.S.)
| | - Dirk Schadendorf
- Department of Dermatology, University Medicine Essen, 45147 Essen, Germany; (E.L.); (K.G.G.); (L.Z.); (R.V.); (A.S.); (A.Z.); (D.S.)
| | - Clemens Aigner
- Department of Thoracic Surgery, University Medicine Essen–Ruhrlandklinik, 45239 Essen, Germany; (L.H.); (J.V.); (C.A.)
| | - Balázs Hegedüs
- Department of Thoracic Surgery, University Medicine Essen–Ruhrlandklinik, 45239 Essen, Germany; (L.H.); (J.V.); (C.A.)
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Hegedűs L, Zámbó B, Pászty K, Padányi R, Varga K, Penniston JT, Enyedi Á. Molecular Diversity of Plasma Membrane Ca2+ Transporting ATPases: Their Function Under Normal and Pathological Conditions. Advances in Experimental Medicine and Biology 2020; 1131:93-129. [DOI: 10.1007/978-3-030-12457-1_5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Hegedüs L, Padányi R, Molnár J, Pászty K, Varga K, Kenessey I, Sárközy E, Wolf M, Grusch M, Hegyi Z, Homolya L, Aigner C, Garay T, Hegedüs B, Tímár J, Kállay E, Enyedi Á. Histone Deacetylase Inhibitor Treatment Increases the Expression of the Plasma Membrane Ca 2+ Pump PMCA4b and Inhibits the Migration of Melanoma Cells Independent of ERK. Front Oncol 2017; 7:95. [PMID: 28596940 PMCID: PMC5442207 DOI: 10.3389/fonc.2017.00095] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 02/10/2017] [Accepted: 04/27/2017] [Indexed: 12/13/2022] Open
Abstract
Several new therapeutic options emerged recently to treat metastatic melanoma; however, the high frequency of intrinsic and acquired resistance among patients shows a need for new therapeutic options. Previously, we identified the plasma membrane Ca2+ ATPase 4b (PMCA4b) as a metastasis suppressor in BRAF-mutant melanomas and found that mutant BRAF inhibition increased the expression of the pump, which then inhibited the migratory and metastatic capability of the cells. Earlier it was also demonstrated that histone deacetylase inhibitors (HDACis) upregulated PMCA4b expression in gastric, colon, and breast cancer cells. In this study, we treated one BRAF wild-type and two BRAF-mutant melanoma cell lines with the HDACis, SAHA and valproic acid, either alone, or in combination with the BRAF inhibitor, vemurafenib. We found that HDACi treatment strongly increased the expression of PMCA4b in all cell lines irrespective of their BRAF mutational status, and this effect was independent of ERK activity. Furthermore, HDAC inhibition also enhanced the abundance of the housekeeping isoform PMCA1. Combination of HDACis with vemurafenib, however, did not have any additive effects on either PMCA isoform. We demonstrated that the HDACi-induced increase in PMCA abundance was coupled to an enhanced [Ca2+]i clearance rate and also strongly inhibited both the random and directional movements of A375 cells. The primary role of PMCA4b in these characteristic changes was demonstrated by treatment with the PMCA4-specific inhibitor, caloxin 1c2, which was able to restore the slower Ca2+ clearance rate and higher motility of the cells. While HDAC treatment inhibited cell motility, it decreased only modestly the ratio of proliferative cells and cell viability. Our results show that in melanoma cells the expression of both PMCA4b and PMCA1 is under epigenetic control and the elevation of PMCA4b expression either by HDACi treatment or by the decreased activation of the BRAF-MEK-ERK pathway can inhibit the migratory capacity of the highly motile A375 cells.
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Affiliation(s)
- Luca Hegedüs
- Department of Thoracic Surgery, Ruhrlandklinik, University Clinic Essen, Essen, Germany.,Department of Pathophysiology and Allergy Research, Comprehensive Cancer Center Vienna, Medical University of Vienna, Vienna, Austria
| | - Rita Padányi
- 2nd Institute of Pathology, Semmelweis University, Budapest, Hungary
| | - Judit Molnár
- 2nd Institute of Pathology, Semmelweis University, Budapest, Hungary
| | - Katalin Pászty
- Molecular Biophysics Research Group of the Hungarian Academy of Sciences, Department of Biophysics, Semmelweis University, Budapest, Hungary
| | - Karolina Varga
- 2nd Institute of Pathology, Semmelweis University, Budapest, Hungary.,MTA-SE-NAP Brain Metastasis Research Group of the Hungarian Academy of Sciences, Semmelweis University, Budapest, Hungary
| | - István Kenessey
- 2nd Institute of Pathology, Semmelweis University, Budapest, Hungary
| | - Eszter Sárközy
- 2nd Institute of Pathology, Semmelweis University, Budapest, Hungary
| | - Matthias Wolf
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center Vienna, Medical University of Vienna, Vienna, Austria
| | - Michael Grusch
- Department of Medicine I, Institute of Cancer Research, Comprehensive Cancer Center Vienna, Medical University of Vienna, Vienna, Austria
| | - Zoltán Hegyi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - László Homolya
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Clemens Aigner
- Department of Thoracic Surgery, Ruhrlandklinik, University Clinic Essen, Essen, Germany
| | - Tamás Garay
- Molecular Oncology Research Group of the Hungarian Academy of Sciences, Semmelweis University, Budapest, Hungary
| | - Balázs Hegedüs
- Department of Thoracic Surgery, Ruhrlandklinik, University Clinic Essen, Essen, Germany.,Molecular Oncology Research Group of the Hungarian Academy of Sciences, Semmelweis University, Budapest, Hungary
| | - József Tímár
- 2nd Institute of Pathology, Semmelweis University, Budapest, Hungary.,Molecular Oncology Research Group of the Hungarian Academy of Sciences, Semmelweis University, Budapest, Hungary
| | - Enikö Kállay
- Department of Pathophysiology and Allergy Research, Comprehensive Cancer Center Vienna, Medical University of Vienna, Vienna, Austria
| | - Ágnes Enyedi
- 2nd Institute of Pathology, Semmelweis University, Budapest, Hungary.,Molecular Oncology Research Group of the Hungarian Academy of Sciences, Semmelweis University, Budapest, Hungary
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Zámbó B, Várady G, Padányi R, Szabó E, Németh A, Langó T, Enyedi Á, Sarkadi B. Decreased calcium pump expression in human erythrocytes is connected to a minor haplotype in the ATP2B4 gene. Cell Calcium 2017; 65:73-79. [PMID: 28216081 DOI: 10.1016/j.ceca.2017.02.001] [Citation(s) in RCA: 21] [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: 01/09/2017] [Revised: 02/02/2017] [Accepted: 02/02/2017] [Indexed: 12/21/2022]
Abstract
Plasma membrane Ca2+-ATPases are key calcium exporter proteins in most tissues, and PMCA4b is the main calcium transporter in the human red blood cells (RBCs). In order to assess the expression level of PMCA4b, we have developed a flow cytometry and specific antibody binding method to quantitatively detect this protein in the erythrocyte membrane. Interestingly, we found several healthy volunteers showing significantly reduced expression of RBC-PMCA4b. Western blot analysis of isolated RBC membranes confirmed this observation, and indicated that there are no compensatory alterations in other PMCA isoforms. In addition, reduced PMCA4b levels correlated with a lower calcium extrusion capacity in these erythrocytes. When exploring the potential genetic background of the reduced PMCA4b levels, we found no missense mutations in the ATP2B4 coding regions, while a formerly unrecognized minor haplotype in the predicted second promoter region closely correlated with lower erythrocyte PMCA4b protein levels. In recent GWA studies, SNPs in this ATP2B4 haplotype have been linked to reduced mean corpuscular hemoglobin concentrations (MCHC), and to protection against malaria infection. Our data suggest that an altered regulation of gene expression is responsible for the reduced RBC-PMCA4b levels that is probably linked to the development of human disease-related phenotypes.
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Affiliation(s)
- Boglárka Zámbó
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudosok krt. 2, Budapest, 1117, Hungary
| | - György Várady
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudosok krt. 2, Budapest, 1117, Hungary
| | - Rita Padányi
- 2nd Department of Pathology, Faculty of Medicine, Semmelweis University, Ulloi ut 26., Budapest, 1085, Hungary
| | - Edit Szabó
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudosok krt. 2, Budapest, 1117, Hungary
| | - Adrienn Németh
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudosok krt. 2, Budapest, 1117, Hungary
| | - Tamás Langó
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudosok krt. 2, Budapest, 1117, Hungary
| | - Ágnes Enyedi
- 2nd Department of Pathology, Faculty of Medicine, Semmelweis University, Ulloi ut 26., Budapest, 1085, Hungary; Molecular Oncology Research Group of the Hungarian Academy of Sciences and Semmelweis University, Ulloi ut 26., Budapest, 1085, Hungary
| | - Balázs Sarkadi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudosok krt. 2, Budapest, 1117, Hungary; MTA-SE Molecular Biophysics Research Group, Department of Biophysics and Radiation Biology, Semmelweis University, Tuzolto u. 37-43., Budapest, 1094, Hungary.
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Ribiczey P, Papp B, Homolya L, Enyedi Á, Kovács T. Selective upregulation of the expression of plasma membrane calcium ATPase isoforms upon differentiation and 1,25(OH)2D3-vitamin treatment of colon cancer cells. Biochem Biophys Res Commun 2015; 464:189-94. [DOI: 10.1016/j.bbrc.2015.06.113] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 06/17/2015] [Indexed: 11/15/2022]
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Szebényi K, Füredi A, Kolacsek O, Csohány R, Prókai Á, Kis-Petik K, Szabó A, Bősze Z, Bender B, Tóvári J, Enyedi Á, Orbán TI, Apáti Á, Sarkadi B. Visualization of Calcium Dynamics in Kidney Proximal Tubules. J Am Soc Nephrol 2015; 26:2731-40. [PMID: 25788535 DOI: 10.1681/asn.2014070705] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [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: 07/24/2014] [Accepted: 01/08/2015] [Indexed: 12/28/2022] Open
Abstract
Intrarenal changes in cytoplasmic calcium levels have a key role in determining pathologic and pharmacologic responses in major kidney diseases. However, cell-specific delivery of calcium-sensitive probes in vivo remains problematic. We generated a transgenic rat stably expressing the green fluorescent protein-calmodulin-based genetically encoded calcium indicator (GCaMP2) predominantly in the kidney proximal tubules. The transposon-based method used allowed the generation of homozygous transgenic rats containing one copy of the transgene per allele with a defined insertion pattern, without genetic or phenotypic alterations. We applied in vitro confocal and in vivo two-photon microscopy to examine basal calcium levels and ligand- and drug-induced alterations in these levels in proximal tubular epithelial cells. Notably, renal ischemia induced a transient increase in cellular calcium, and reperfusion resulted in a secondary calcium load, which was significantly decreased by systemic administration of specific blockers of the angiotensin receptor and the Na-Ca exchanger. The parallel examination of in vivo cellular calcium dynamics and renal circulation by fluorescent probes opens new possibilities for physiologic and pharmacologic investigations.
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Affiliation(s)
- Kornélia Szebényi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - András Füredi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Orsolya Kolacsek
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | | | | | - Katalin Kis-Petik
- Department of Biophysics and Radiation Biology, MTA-SE Molecular Biophysics Research Group, and
| | - Attila Szabó
- MTA-SE, Pediatrics and Nephrology Research Group, Budapest, Hungary
| | | | | | - József Tóvári
- Department of Experimental Pharmacology, National Institute of Oncology, Budapest, Hungary
| | - Ágnes Enyedi
- Second Department of Pathology, Semmelweis University, Budapest, Hungary
| | - Tamás I Orbán
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Ágota Apáti
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary;
| | - Balázs Sarkadi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary; Department of Biophysics and Radiation Biology, MTA-SE Molecular Biophysics Research Group, and
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Antalffy G, Pászty K, Varga K, Hegedűs L, Enyedi Á, Padányi R. A C-terminal di-leucine motif controls plasma membrane expression of PMCA4b. Biochim Biophys Acta 2013; 1833:2561-2572. [PMID: 23830917 DOI: 10.1016/j.bbamcr.2013.06.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 06/18/2013] [Accepted: 06/24/2013] [Indexed: 01/17/2023]
Abstract
Recent evidences show that the localization of different plasma membrane Ca(2+) ATPases (PMCAs) is regulated in various complex, cell type-specific ways. Here we show that in low-density epithelial and endothelial cells PMCA4b localized mostly in intracellular compartments and its plasma membrane localization was enhanced upon increasing density of cells. In good correlation with the enhanced plasma membrane localization a significantly more efficient Ca(2+) clearance was observed in confluent versus non-confluent HeLa cell cultures expressing mCherry-PMCA4b. We analyzed the subcellular localization and function of various C-terminally truncated PMCA4b variants and found that a truncated mutant PMCA4b-ct24 was mostly intracellular while another mutant, PMCA4b-ct48, localized more to the plasma membrane, indicating that a protein sequence corresponding to amino acid residues 1158-1181 contained a signal responsible for the intracellular retention of PMCA4b in non-confluent cultures. Alteration of three leucines to alanines at positions 1167-1169 resulted in enhanced cell surface expression and an appropriate Ca(2+) transport activity of both wild type and truncated pumps, suggesting that the di-leucine-like motif (1167)LLL was crucial in targeting PMCA4b. Furthermore, upon loss of cell-cell contact by extracellular Ca(2+) removal, the wild-type pump was translocated to the early endosomal compartment. Targeting PMCA4b to early endosomes was diminished by the L(1167-69)A mutation, and the mutant pump accumulated in long tubular cytosolic structures. In summary, we report a di-leucine-like internalization signal at the C-tail of PMCA4b and suggest an internalization-mediated loss of function of the pump upon low degree of cell-cell contact.
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Affiliation(s)
- Géza Antalffy
- Molecular Biophysics Research Group of the Hungarian Academy of Sciences and Department of Biophysics, Semmelweis University, Budapest, Hungary
| | - Katalin Pászty
- Molecular Biophysics Research Group of the Hungarian Academy of Sciences and Department of Biophysics, Semmelweis University, Budapest, Hungary
| | - Karolina Varga
- Institute of Molecular Pharmacology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Luca Hegedűs
- Institute of Molecular Pharmacology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Ágnes Enyedi
- Hungarian National Blood Transfusion Service, Budapest, Hungary; Institute of Molecular Pharmacology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Rita Padányi
- Hungarian National Blood Transfusion Service, Budapest, Hungary.
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Arbabian A, Brouland JP, Apáti Á, Pászty K, Hegedűs L, Enyedi Á, Chomienne C, Papp B. Modulation of endoplasmic reticulum calcium pump expression during lung cancer cell differentiation. FEBS J 2012; 280:5408-18. [PMID: 23157274 DOI: 10.1111/febs.12064] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [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: 09/04/2012] [Revised: 10/23/2012] [Accepted: 11/07/2012] [Indexed: 12/14/2022]
Abstract
Cellular calcium signaling plays important roles in several signal transduction pathways that control proliferation, differentiation and apoptosis. In epithelial cells calcium signaling is initiated mainly by calcium release from endoplasmic-reticulum-associated intracellular calcium pools. Because calcium is accumulated in the endoplasmic reticulum by sarco/endoplasmic reticulum calcium ATPases (SERCA), these enzymes play a critical role in the control of calcium-dependent cell activation, growth and survival. We investigated the modulation of SERCA expression and function in human lung adenocarcinoma cells. In addition to the ubiquitous SERCA2 enzyme, the SERCA3 isoform was also expressed at variable levels. SERCA3 expression was selectively enhanced during cell differentiation in lung cancer cells, and marked SERCA3 expression was found in fully differentiated normal bronchial epithelium. As studied by using a recombinant fluorescent calcium probe, induction of the expression of SERCA3, a lower calcium affinity pump, was associated with decreased intracellular calcium storage, whereas the amplitude of capacitative calcium influx remained unchanged. Our observations indicate that the calcium homeostasis of the endoplasmic reticulum in lung adenocarcinoma cells presents a functional defect due to decreased SERCA3 expression that is corrected during pharmacologically induced differentiation. The data presented in this work show, for the first time, that endoplasmic reticulum calcium storage is anomalous in lung cancer cells, and suggest that SERCA3 may serve as a useful new phenotypic marker for the study of lung epithelial differentiation.
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Affiliation(s)
- Atousa Arbabian
- Institut National de la Santé et de la Recherche Médicale, UMR-S 940, Paris, France; Institut Universitaire d'Hématologie, Université Paris Diderot, PRES Sorbonne Paris-Cité, France
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Abstract
Alternative splicing of the first intracellular loop differentially targets plasma membrane calcium ATPase (PMCA) isoform 2 to the apical or basolateral membrane in MDCK cells. To determine if the targeting is affected by lipid interactions, we stably expressed PMCA2w/b and PMCA2z/b in MDCK cells, and analyzed the PMCA distribution by confocal fluorescence microscopy and membrane fractionation. PMCA2w/b showed clear apical and lateral distribution, whereas PMCA2z/b was mainly localized to the basolateral membrane. A significant fraction of PMCA2w/b partitioned into low-density membranes associated with lipid rafts. Depletion of membrane cholesterol by methyl-beta-cyclodextrin resulted in reduced lipid raft association and a striking loss of PMCA2w/b from the apical membrane, whereas the lateral localization of PMCA2z/b remained unchanged. Our data indicate that alternative splicing differentially affects the lipid interactions of PMCA2w/b and PMCA2z/b and that the apical localization of PMCA2w/b is lipid raft-dependent and sensitive to cholesterol depletion.
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Affiliation(s)
- Yuning Xiong
- Department of Biochemistry and Molecular Biology, College of Medicine, Mayo Clinic, Rochester, MN, USA
| | - Géza Antalffy
- National Blood Center, Department of Molecular Cell Biology, H-1113 Budapest, Hungary
| | - Ágnes Enyedi
- National Blood Center, Department of Molecular Cell Biology, H-1113 Budapest, Hungary
| | - Emanuel E. Strehler
- Department of Biochemistry and Molecular Biology, College of Medicine, Mayo Clinic, Rochester, MN, USA
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Ribiczey P, Tordai A, Andrikovics H, Filoteo AG, Penniston JT, Enouf J, Enyedi Á, Papp B, Kovács T. Isoform-specific up-regulation of plasma membrane Ca2+ATPase expression during colon and gastric cancer cell differentiation. Cell Calcium 2007; 42:590-605. [PMID: 17433436 PMCID: PMC2096732 DOI: 10.1016/j.ceca.2007.02.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2006] [Revised: 02/09/2007] [Indexed: 02/06/2023]
Abstract
In this work we demonstrate a differentiation-induced up-regulation of the expression of plasma membrane Ca2+ATPase (PMCA) isoforms being present in various gastric/colon cancer cell types. We found PMCA1b as the major isoform in non-differentiated cancer cell lines, whereas the expression level of PMCA4b was significantly lower. Cell differentiation initiated with short chain fatty acids (SCFAs) and trichostatin A, or spontaneous differentiation of post-confluent cell cultures resulted in a marked induction of PMCA4b expression, while only moderately increased PMCA1b levels. Up-regulation of PMCA4b expression was demonstrated both at the protein and mRNA levels, and closely correlated with the induction of established differentiation markers. In contrast, the expression level of the Na+/K+-ATPase or that of the sarco/endoplasmic reticulum Ca2+ATPase 2 protein did not change significantly under these conditions. In membrane vesicles obtained from SCFA-treated gastric/colon cancer cells a marked increase in the PMCA-dependent Ca2+ transport activity was observed, indicating a general increase of PMCA function during the differentiation of these cancer cells. Because various PMCA isoforms display distinct functional characteristics, we suggest that up-regulated PMCA expression, together with a major switch in PMCA isoform pattern may significantly contribute to the differentiation of gastric/colon cancer cells. The analysis of PMCA expression may provide a new diagnostic tool for monitoring the tumor phenotype.
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Affiliation(s)
- Polett Ribiczey
- National Medical Centre, Institute of Haematology and Immunology, Budapest, Hungary
| | - Attila Tordai
- National Medical Centre, Institute of Haematology and Immunology, Budapest, Hungary
| | - Hajnalka Andrikovics
- National Medical Centre, Institute of Haematology and Immunology, Budapest, Hungary
| | - Adelaida G. Filoteo
- Department of Biochemistry and Molecular Biology, Mayo Foundation, Rochester, MN 55905, United States
| | | | - Jocelyne Enouf
- Institut National de la Santé et de la Recherche Médicale (INSERM) U689 E4, Paris, France
- Université Paris 7-Denis Diderot, IFR139, Site Lariboisière, Paris, France
| | - Ágnes Enyedi
- National Medical Centre, Institute of Haematology and Immunology, Budapest, Hungary
| | - Béla Papp
- INSERM, U718, Laboratoire de Biologie Cellulaire Hématopoïétique, Paris, France
- Université Paris 7-Denis Diderot, Faculté de médecine, IFR105-Saint Louis-Institut Universitaire d’Hématologie, Paris, France
| | - Tünde Kovács
- National Medical Centre, Institute of Haematology and Immunology, Budapest, Hungary
- *Corresponding author at: National Medical Centre, Institute of Haematology and Immunology, Diószegi u. 64, H-1113 Budapest, Hungary, Tel/Fax: 36-1-372-4353 E-mail address:
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Pászty K, Antalffy G, Penheiter A, Homolya L, Padányi R, Iliás A, Filoteo A, Penniston J, Enyedi Á. The caspase-3 cleavage product of the plasma membrane Ca2+-ATPase 4b is activated and appropriately targeted. Biochem J 2006; 391:687-92. [PMID: 16080782 PMCID: PMC1276970 DOI: 10.1042/bj20051012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The calmodulin-activated transporter hPMCA4 (human plasma membrane Ca2+-ATPase isoform 4) is a target for cleavage by caspase-3 during apoptosis. We have demonstrated that caspase-3 generates a 120 kDa fragment of this pump which lacks the complete autoinhibitory sequence [Paszty, Verma, Padanyi, Filoteo, Penniston and Enyedi (2002) J. Biol. Chem. 277, 6822-6829]. In the present study we analysed further the characteristics of the fragment of hPMCA4b produced by caspase-3. We did this by overexpressing the caspase-3 cleavage product of hPMCA4b in COS-7 and MDCKII (Madin-Darby canine kidney II) cells. This technique made it possible to clearly define the properties of this fragment, and we showed that it is constitutively active, as it forms a phosphoenzyme intermediate and has high Ca2+ transport activity in the absence of calmodulin. When this fragment of hPMCA4b was stably expressed in MDCKII cell clones, it was targeted without degradation to the basolateral plasma membrane. In summary, our studies emphasize that the caspase-3 cleavage product of hPMCA4b is constitutively active, and that the C-terminus is not required for proper targeting of hPMCA4b to the plasma membrane. Also, for the first time, we have generated cell clones that stably express a constitutively active PMCA.
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Affiliation(s)
- Katalin Pászty
- *Membrane Research Group of the Hungarian Academy of Sciences, Nádor u.7., H-1051, Budapest, Hungary
| | - Géza Antalffy
- †National Medical Center, Diószegi u. 64., H-1113 Budapest, Hungary
| | - Alan R. Penheiter
- ‡Department of Biochemistry and Molecular Biology, Mayo Foundation, 200 First Street South West, Rochester, MN 55905, U.S.A
| | - László Homolya
- *Membrane Research Group of the Hungarian Academy of Sciences, Nádor u.7., H-1051, Budapest, Hungary
| | - Rita Padányi
- †National Medical Center, Diószegi u. 64., H-1113 Budapest, Hungary
| | - Attila Iliás
- §Institute of Enzymology, Hungarian Academy of Sciences, Karolina út 29., H-1113 Budapest, Hungary
| | - Adelaida G. Filoteo
- ‡Department of Biochemistry and Molecular Biology, Mayo Foundation, 200 First Street South West, Rochester, MN 55905, U.S.A
| | - John T. Penniston
- ∥Neuroscience Center, Massachusetts General Hospital, Boston, MA 02114, U.S.A., and Harvard Medical School, Boston, MA 02115, U.S.A
| | - Ágnes Enyedi
- †National Medical Center, Diószegi u. 64., H-1113 Budapest, Hungary
- To whom correspondence should be addressed (email )
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