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Saint-Martin Willer A, Montani D, Capuano V, Antigny F. Orai1/STIMs modulators in pulmonary vascular diseases. Cell Calcium 2024; 121:102892. [PMID: 38735127 DOI: 10.1016/j.ceca.2024.102892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 03/27/2024] [Accepted: 04/23/2024] [Indexed: 05/14/2024]
Abstract
Calcium (Ca2+) is a secondary messenger that regulates various cellular processes. However, Ca2+ mishandling could lead to pathological conditions. Orai1 is a Ca2+channel contributing to the store-operated calcium entry (SOCE) and plays a critical role in Ca2+ homeostasis in several cell types. Dysregulation of Orai1 contributed to severe combined immune deficiency syndrome, some cancers, pulmonary arterial hypertension (PAH), and other cardiorespiratory diseases. During its activation process, Orai1 is mainly regulated by stromal interacting molecule (STIM) proteins, especially STIM1; however, many other regulatory partners have also been recently described. Increasing knowledge about these regulatory partners provides a better view of the downstream signalling pathways of SOCE and offers an excellent opportunity to decipher Orai1 dysregulation in these diseases. These proteins participate in other cellular functions, making them attractive therapeutic targets. This review mainly focuses on Orai1 regulatory partners in the physiological and pathological conditions of the pulmonary circulation and inflammation.
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Affiliation(s)
- Anaïs Saint-Martin Willer
- Université Paris-Saclay, Faculté de Médecine, Le Kremlin-Bicêtre, France; INSERM UMR_S 999 Hypertension pulmonaire: Physiopathologie et Innovation Thérapeutique, Hôpital Marie Lannelongue, Le Plessis-Robinson, France
| | - David Montani
- Université Paris-Saclay, Faculté de Médecine, Le Kremlin-Bicêtre, France; INSERM UMR_S 999 Hypertension pulmonaire: Physiopathologie et Innovation Thérapeutique, Hôpital Marie Lannelongue, Le Plessis-Robinson, France; Assistance Publique - Hôpitaux de Paris (AP-HP), Service de Pneumologie et Soins Intensifs Respiratoires, Centre de Référence de l'Hypertension Pulmonaire, Hôpital Bicêtre, Le Kremlin-Bicêtre, France
| | - Véronique Capuano
- Université Paris-Saclay, Faculté de Médecine, Le Kremlin-Bicêtre, France; INSERM UMR_S 999 Hypertension pulmonaire: Physiopathologie et Innovation Thérapeutique, Hôpital Marie Lannelongue, Le Plessis-Robinson, France; Hôptal Marie Lannelongue, Groupe Hospitalier Paris Saint-Joseph, Le Plessis-Robinson, France
| | - Fabrice Antigny
- Université Paris-Saclay, Faculté de Médecine, Le Kremlin-Bicêtre, France; INSERM UMR_S 999 Hypertension pulmonaire: Physiopathologie et Innovation Thérapeutique, Hôpital Marie Lannelongue, Le Plessis-Robinson, France.
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2
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Xie Y, Liang H, Jiang N, Liu D, Zhang N, Li Q, Zhang K, Sang X, Feng Y, Chen R, Zhang Y, Chen Q. Graphene quantum dots induce cascadic apoptosis via interaction with proteins associated with anti-oxidation after endocytosis by Trypanosoma brucei. Front Immunol 2022; 13:1022050. [PMID: 36561761 PMCID: PMC9763322 DOI: 10.3389/fimmu.2022.1022050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 11/08/2022] [Indexed: 12/12/2022] Open
Abstract
Trypanosoma brucei, the pathogen causing African sleeping sickness (trypanosomiasis) in humans, causes debilitating diseases in many regions of the world, but mainly in African countries with tropical and subtropical climates. Enormous efforts have been devoted to controlling trypanosomiasis, including expanding vector control programs, searching for novel anti-trypanosomial agents, and developing vaccines, but with limited success. In this study, we systematically investigated the effect of graphene quantum dots (GQDs) on trypanosomal parasites and their underlying mechanisms. Ultrasmall-sized GQDs can be efficiently endocytosed by T. brucei and with no toxicity to mammalian-derived cells, triggering a cascade of apoptotic reactions, including mitochondrial disorder, intracellular reactive oxygen species (ROS) elevation, Ca2+ accumulation, DNA fragmentation, adenosine triphosphate (ATP) synthesis impairment, and cell cycle arrest. All of these were caused by the direct interaction between GQDs and the proteins associated with cell apoptosis and anti-oxidation responses, such as trypanothione reductase (TryR), a key protein in anti-oxidation. GQDs specifically inhibited the enzymatic activity of TryR, leading to a reduction in the antioxidant capacity and, ultimately, parasite apoptotic death. These data, for the first time, provide a basis for the exploration of GQDs in the development of anti-trypanosomials.
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Affiliation(s)
- Yiwei Xie
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China
| | - Hongrui Liang
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China
| | - Ning Jiang
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China
| | - Dingyuan Liu
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China
| | - Naiwen Zhang
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China
| | - Qilong Li
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China
| | - Kai Zhang
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China
| | - Xiaoyu Sang
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China
| | - Ying Feng
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China
| | - Ran Chen
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China
| | - Yiwei Zhang
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China
| | - Qijun Chen
- Key Laboratory of Livestock Infectious Diseases, Ministry of Education, Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, China,Key Laboratory of Ruminant Infectious Disease Prevention and Control (East), Ministry of Agriculture and Rural Affairs, Shenyang, China,Research Unit for Pathogenic Mechanism of Zoonotic Parasites, Chinese Academy of Medical Sciences, Shenyang Agricultural University, Shenyang, China,*Correspondence: Qijun Chen,
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Shawer H, Norman K, Cheng CW, Foster R, Beech DJ, Bailey MA. ORAI1 Ca 2+ Channel as a Therapeutic Target in Pathological Vascular Remodelling. Front Cell Dev Biol 2021; 9:653812. [PMID: 33937254 PMCID: PMC8083964 DOI: 10.3389/fcell.2021.653812] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/08/2021] [Indexed: 12/21/2022] Open
Abstract
In the adult, vascular smooth muscle cells (VSMC) are normally physiologically quiescent, arranged circumferentially in one or more layers within blood vessel walls. Remodelling of native VSMC to a proliferative state for vascular development, adaptation or repair is driven by platelet-derived growth factor (PDGF). A key effector downstream of PDGF receptors is store-operated calcium entry (SOCE) mediated through the plasma membrane calcium ion channel, ORAI1, which is activated by the endoplasmic reticulum (ER) calcium store sensor, stromal interaction molecule-1 (STIM1). This SOCE was shown to play fundamental roles in the pathological remodelling of VSMC. Exciting transgenic lineage-tracing studies have revealed that the contribution of the phenotypically-modulated VSMC in atherosclerotic plaque formation is more significant than previously appreciated, and growing evidence supports the relevance of ORAI1 signalling in this pathologic remodelling. ORAI1 has also emerged as an attractive potential therapeutic target as it is accessible to extracellular compound inhibition. This is further supported by the progression of several ORAI1 inhibitors into clinical trials. Here we discuss the current knowledge of ORAI1-mediated signalling in pathologic vascular remodelling, particularly in the settings of atherosclerotic cardiovascular diseases (CVDs) and neointimal hyperplasia, and the recent developments in our understanding of the mechanisms by which ORAI1 coordinates VSMC phenotypic remodelling, through the activation of key transcription factor, nuclear factor of activated T-cell (NFAT). In addition, we discuss advances in therapeutic strategies aimed at the ORAI1 target.
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Affiliation(s)
- Heba Shawer
- School of Medicine, The Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Katherine Norman
- School of Medicine, The Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom.,School of Chemistry, University of Leeds, Leeds, United Kingdom
| | - Chew W Cheng
- School of Medicine, The Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Richard Foster
- School of Medicine, The Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom.,School of Chemistry, University of Leeds, Leeds, United Kingdom
| | - David J Beech
- School of Medicine, The Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Marc A Bailey
- School of Medicine, The Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
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Maksoud MJE, Tellios V, Xiang YY, Lu WY. Nitric oxide displays a biphasic effect on calcium dynamics in microglia. Nitric Oxide 2021; 108:28-39. [PMID: 33418057 DOI: 10.1016/j.niox.2021.01.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 11/11/2020] [Accepted: 01/01/2021] [Indexed: 01/13/2023]
Abstract
Calcium is a critical secondary messenger in microglia. In response to inflammation, microglia mobilize intracellular calcium and increase the expression of inducible nitric oxide synthase (iNOS), which produces nitric oxide (NO). This study set to explore whether NO regulates intracellular calcium dynamics through transient receptor potential (TRP) channels in primary wildtype (WT) and iNOS knockout (iNOS-/-) microglia, and the BV2 microglial cell line using calcium imaging and voltage-clamp recordings. Our results demonstrated that application of the NO-donor SNAP induced a biphasic calcium response in naïve murine microglia. Specifically, phase I was characterized by a rapid decline in calcium influx that was attenuated by pretreatment of the store operated calcium channel (SOCC) inhibitor 2APB, while phase II presented as a slow calcium influx that was abolished by pretreatment with the TRP vanilloid type 2 (TRPV2) channel inhibitor tranilast. Importantly, in the presence of a protein kinase G (PKG) inhibitor, the SNAP-mediated calcium decline in phase I persisted while the calcium influx in phase II was abolished. Application of thapsigargin to activate SOCCs caused a calcium influx through a nonselective cation conductance in BV2 microglia, which was abruptly attenuated by SNAP. Importantly, iNOS-/- microglia displayed a significantly larger calcium influx though SOCCs while expressing less stromal interaction molecule 1, Orai1, and TRP canonical type 1 and 3 mRNA, when compared to WT microglia. Together, these results demonstrate that NO signaling restricts calcium influx through SOCCs independent of PKG signaling and increases calcium influx through TRPV2 channels in a PKG-dependent mechanism in microglia.
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Affiliation(s)
- Matthew J E Maksoud
- Graduate Program of Neuroscience, The University of Western Ontario, Canada; Robarts Research Institute, The University of Western Ontario, Canada.
| | - Vasiliki Tellios
- Graduate Program of Neuroscience, The University of Western Ontario, Canada; Robarts Research Institute, The University of Western Ontario, Canada.
| | - Yun-Yan Xiang
- Robarts Research Institute, The University of Western Ontario, Canada.
| | - Wei-Yang Lu
- Graduate Program of Neuroscience, The University of Western Ontario, Canada; Robarts Research Institute, The University of Western Ontario, Canada; Department of Physiology and Pharmacology, University of Western Ontario, Canada.
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Liu X, Pan Z. Store-Operated Calcium Entry in the Cardiovascular System. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1349:303-333. [DOI: 10.1007/978-981-16-4254-8_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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6
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Liu B, Zhang B, Roos CM, Zeng W, Zhang H, Guo R. Upregulation of Orai1 and increased calcium entry contribute to angiotensin II-induced human coronary smooth muscle cell proliferation: Running Title: Angiotensin II-induced human coronary smooth muscle cells proliferation. Peptides 2020; 133:170386. [PMID: 32827590 DOI: 10.1016/j.peptides.2020.170386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 08/18/2020] [Accepted: 08/18/2020] [Indexed: 12/12/2022]
Abstract
Angiotensin II (Ang II) is an oligopeptide of the renin-angiotensin system, and Ang II-induced vascular smooth muscle cell (VSMC) proliferation is an important pathophysiological process involved in atherosclerosis; however, the underlying mechanism remains unclear. Orai1 and Stim1 are the main components of store-operated Ca2+ entry (SOCE), which has an important effect on VSMC proliferation. In the present study, we showed that Ang II-induced human coronary smooth muscle cell (HCSMC) proliferation was associated with increased calcium entry. The expression of Orai1, but not that of Stim1, was significantly upregulated in Ang II-treated HCSMCs. However, knockdown of Orai1 or Stim1 decreased HCSMC proliferation and SOCE activity in Ang II-treated HCSMCs. Orai1 was significantly downregulated in HCSMCs transfected with short interfering RNA (siRNA) against NOX2 or NF-κB. Transfection with siRNA against NOX2 or p65 also decreased Ang II-induced HCSMCs SOCE activation and proliferation. These findings suggested that Ang II upregulated Orai1 via the NF-κB and NOX2 pathways, leading to increased SOCE and HCSMC proliferation. The molecular factors mediating Ang II-induced SOCE upregulation are potential therapeutic targets for the prevention of Ang II-sensitive or Ang II-dependent HCSMC proliferation.
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Affiliation(s)
- Bei Liu
- Department of Cardiology, 920th Hospital of the PLA Joint Logistics Support Force, Kunming, Yunnan, 650032, China
| | - Bin Zhang
- Division of Cardiovascular Surgery, Mayo Clinic, 200 First St. SW, Rochester, MN 55905, USA
| | - Carolyn M Roos
- Division of Cardiovascular Surgery, Mayo Clinic, 200 First St. SW, Rochester, MN 55905, USA
| | - Wenjun Zeng
- Department of Cardiology, 920th Hospital of the PLA Joint Logistics Support Force, Kunming, Yunnan, 650032, China
| | - Haiping Zhang
- Department of Cardiology, 920th Hospital of the PLA Joint Logistics Support Force, Kunming, Yunnan, 650032, China
| | - Ruiwei Guo
- Department of Cardiology, 920th Hospital of the PLA Joint Logistics Support Force, Kunming, Yunnan, 650032, China.
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Avila-Medina J, Mayoral-González I, Galeano-Otero I, Redondo PC, Rosado JA, Smani T. Pathophysiological Significance of Store-Operated Calcium Entry in Cardiovascular and Skeletal Muscle Disorders and Angiogenesis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1131:489-504. [PMID: 31646522 DOI: 10.1007/978-3-030-12457-1_19] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Store-Operated Ca2+ Entry (SOCE) is an important Ca2+ influx pathway expressed by several excitable and non-excitable cell types. SOCE is recognized as relevant signaling pathway not only for physiological process, but also for its involvement in different pathologies. In fact, independent studies demonstrated the implication of essential protein regulating SOCE, such as STIM, Orai and TRPCs, in different pathogenesis and cell disorders, including cardiovascular disease, muscular dystrophies and angiogenesis. Compelling evidence showed that dysregulation in the function and/or expression of isoforms of STIM, Orai or TRPC play pivotal roles in cardiac hypertrophy and heart failure, vascular remodeling and hypertension, skeletal myopathies, and angiogenesis. In this chapter, we summarized the current knowledge concerning the mechanisms underlying abnormal SOCE and its involvement in some diseases, as well as, we discussed the significance of STIM, Orai and TRPC isoforms as possible therapeutic targets for the treatment of angiogenesis, cardiovascular and skeletal muscle diseases.
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Affiliation(s)
- Javier Avila-Medina
- Department of Medical Physiology and Biophysics, University of Seville, Sevilla, Spain
- Institute of Biomedicine of Seville (IBiS), University Hospital of Virgen del Rocío/CSIC/University of Seville, Sevilla, Spain
| | - Isabel Mayoral-González
- Department of Medical Physiology and Biophysics, University of Seville, Sevilla, Spain
- Institute of Biomedicine of Seville (IBiS), University Hospital of Virgen del Rocío/CSIC/University of Seville, Sevilla, Spain
- Department of Surgery, University of Seville, Sevilla, Spain
| | - Isabel Galeano-Otero
- Department of Medical Physiology and Biophysics, University of Seville, Sevilla, Spain
- Institute of Biomedicine of Seville (IBiS), University Hospital of Virgen del Rocío/CSIC/University of Seville, Sevilla, Spain
| | - Pedro C Redondo
- Department of Physiology, Cell Physiology Research Group and Institute of Molecular Pathology Biomarkers, University of Extremadura, Cáceres, Spain
| | - Juan A Rosado
- 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, University of Seville, Sevilla, Spain.
- Institute of Biomedicine of Seville (IBiS), University Hospital of Virgen del Rocío/CSIC/University of Seville, Sevilla, Spain.
- CIBERCV, Madrid, Spain.
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Pichavaram P, Yin W, Evanson KW, Jaggar JH, Mancarella S. Elevated plasma catecholamines functionally compensate for the reduced myogenic tone in smooth muscle STIM1 knockout mice but with deleterious cardiac effects. Cardiovasc Res 2019; 114:668-678. [PMID: 29360991 DOI: 10.1093/cvr/cvy015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 01/18/2018] [Indexed: 02/05/2023] Open
Abstract
Aims Stromal interaction molecule 1 (STIM1) has emerged as an important player in the regulation of growth and proliferation of smooth muscle cells. Therefore, we hypothesized that STIM1 plays a crucial role in the maintenance of vascular integrity. The objective of this study was to evaluate whether reduced expression of STIM1 could modify the structure and function of the vasculature, leading to changes in blood pressure (BP). Methods and results Smooth muscle-specific STIM1 knockout (sm-STIM1 KO) in mice resulted in arteries with ∼80% reduced STIM1 protein expression as compared with control mice. Mesenteric vessels exposed to increasing transmural pressure revealed attenuated myogenic reactivity and reduced vasoconstrictor response to phenylephrine in sm-STIM1 KO arteries. BP monitored via telemetry in sm-STIM1 KO and matched controls did not reveal differences. However, heart rate was significantly increased in sm-STIM1 KO mice. Consistent with these findings, plasma catecholamine levels were higher in sm-STIM1 KO than in control mice. Increased sympathetic activity in sm-STIM1 KO mice was unmasked by apha1-adrenergic receptor inhibitor (prazosin) and by treatment with the ganglion-blocking agent, hexamethonium. Both treatments resulted in a greater reduction of BP in sm-STIM1 KO mice. Cytoskeleton of cultured smooth muscle cells was studied by immunocytochemistry using specific antibodies. Staining for actin and vinculin revealed significant alterations in the cytoskeletal architecture of cells isolated from sm-STIM1 KO arteries. Finally, although sm-STIM1 KO mice were protected from Ang II-induced hypertension, such treatment resulted in significant fibrosis and a rapid deterioration of cardiac function. Conclusions STIM1 deletion in smooth muscle results in attenuated myogenic tone and cytoskeletal defects with detrimental effects on the mechanical properties of arterial tissue. Although BP is maintained by elevated circulating catecholamine, this compensatory stimulation has a deleterious long-term effect on the myocardium.
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Affiliation(s)
- Prahalathan Pichavaram
- Department of Physiology, University of Tennessee Health Sciences Center, 71 South Manassas Street, Memphis, TN 38163, USA
| | - Wen Yin
- Department of Physiology, University of Tennessee Health Sciences Center, 71 South Manassas Street, Memphis, TN 38163, USA.,Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Kirk W Evanson
- Department of Physiology, University of Tennessee Health Sciences Center, 71 South Manassas Street, Memphis, TN 38163, USA
| | - Jonathan H Jaggar
- Department of Physiology, University of Tennessee Health Sciences Center, 71 South Manassas Street, Memphis, TN 38163, USA
| | - Salvatore Mancarella
- Department of Physiology, University of Tennessee Health Sciences Center, 71 South Manassas Street, Memphis, TN 38163, USA
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9
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Retana Moreira L, Rodríguez Serrano F, Osuna A. Extracellular vesicles of Trypanosoma cruzi tissue-culture cell-derived trypomastigotes: Induction of physiological changes in non-parasitized culture cells. PLoS Negl Trop Dis 2019; 13:e0007163. [PMID: 30789912 PMCID: PMC6383987 DOI: 10.1371/journal.pntd.0007163] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 01/16/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Trypanosoma cruzi is the obligate intracellular parasite that causes Chagas disease. The pathogenesis of this disease is a multifactorial complex process that involves a large number of molecules and particles, including the extracellular vesicles. The presence of EVs of T. cruzi was first described in 1979 and, since then, research regarding these particles has been increasing. Some of the functions described for these EVs include the increase in heart parasitism and the immunomodulation and evasion of the host immune response. Also, EVs may be involved in parasite adhesion to host cells and host cell invasion. METHODOLOGY/PRINCIPAL FINDINGS EVs (exosomes) of the Pan4 strain of T. cruzi were isolated by differential centrifugation, and measured and quantified by TEM, NTA and DLS. The effect of EVs in increasing the parasitization of Vero cells was evaluated and the ED50 was calculated. Changes in cell permeability induced by EVs were evaluated in Vero and HL-1 cardiomyocyte cells using cell viability techniques such as trypan blue and MTT assays, and by confocal microscopy. The intracellular mobilization of Ca2+ and the disruption of the actin cytoskeleton induced by EVs over Vero cells were followed-up in time using confocal microscopy. To evaluate the effect of EVs over the cell cycle, cell cycle analyses using flow cytometry and Western blotting of the phosphorylated and non-phosphorylated protein of Retinoblastoma were performed. CONCLUSION/SIGNIFICANCE The incubation of cells with EVs of trypomastigotes of the Pan4 strain of T. cruzi induce a number of changes in the host cells that include a change in cell permeability and higher intracellular levels of Ca2+ that can alter the dynamics of the actin cytoskeleton and arrest the cell cycle at G0/G1 prior to the DNA synthesis necessary to complete mitosis. These changes aid the invasion of host cells and augment the percentage of cell parasitization.
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Affiliation(s)
- Lissette Retana Moreira
- Instituto de Biotecnología, Grupo de Bioquímica y Parasitología Molecular, Departamento de Parasitología, Universidad de Granada, Granada, Spain
| | | | - Antonio Osuna
- Instituto de Biotecnología, Grupo de Bioquímica y Parasitología Molecular, Departamento de Parasitología, Universidad de Granada, Granada, Spain
- * E-mail:
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10
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Johnson M, Trebak M. ORAI channels in cellular remodeling of cardiorespiratory disease. Cell Calcium 2019; 79:1-10. [PMID: 30772685 DOI: 10.1016/j.ceca.2019.01.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 01/31/2019] [Accepted: 01/31/2019] [Indexed: 01/08/2023]
Abstract
Cardiorespiratory disease, which includes systemic arterial hypertension, restenosis, atherosclerosis, pulmonary arterial hypertension, asthma, and chronic obstructive pulmonary disease (COPD) are highly prevalent and devastating diseases with limited therapeutic modalities. A common pathophysiological theme to these diseases is cellular remodeling, which is contributed by changes in expression and activation of ion channels critical for either excitability or growth. Calcium (Ca2+) signaling and specifically ORAI Ca2+ channels have emerged as significant regulators of smooth muscle, endothelial, epithelial, platelet, and immune cell remodeling. This review details the dysregulation of ORAI in cardiorespiratory diseases, and how this dysregulation of ORAI contributes to cellular remodeling.
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Affiliation(s)
- Martin Johnson
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, United States
| | - Mohamed Trebak
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, United States.
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11
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Nguyen NT, Han W, Cao W, Wang Y, Wen S, Huang Y, Li M, Du L, Zhou Y. Store‐Operated Calcium Entry Mediated by ORAI and STIM. Compr Physiol 2018; 8:981-1002. [DOI: 10.1002/cphy.c170031] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Liu B, Zhang B, Huang S, Yang L, Roos CM, Thompson MA, Prakash YS, Zang J, Miller JD, Guo R. Ca 2+ Entry Through Reverse Mode Na +/Ca 2+ Exchanger Contributes to Store Operated Channel-Mediated Neointima Formation After Arterial Injury. Can J Cardiol 2018; 34:791-799. [PMID: 29705161 DOI: 10.1016/j.cjca.2018.01.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 01/16/2018] [Accepted: 01/16/2018] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Na+/Ca2+ exchange (NCX) reversal-mediated Ca2+ entry is a critical pathway for stimulating proliferation in many cell lines. However, the role of reverse-mode NCX1 in neointima formation and atherosclerosis remains unclear. The aims of the present study were to investigate the functional role of NCX1 in the pathogenesis of atherosclerosis and vascular smooth muscle cell (VSMC) proliferation, and to determine the interaction between NCX1 and store depletion in VSMCs. METHODS A rat balloon injury model was established to examine the effect of the knockdown of NCX1 on neointima formation after injury. VSMCs were cultured to verify that NCX1 knockdown suppressed serum-induced VSMC proliferation. RESULTS The results showed that balloon injury induced neointima formation and upregulated NCX1 expression at 7 and 14 days after injury in rat carotid arteries (1.18- and 1.45-fold, respectively). A lentivirus vector expressing short hairpin (sh)RNA against rat NCX1 dramatically downregulated NCX1, proliferating cell nuclear antigen (PCNA) and Ki-67 expression, and suppressed neointima formation in vivo (62% at 7 days and 70% at 14 days). KB-R7943 (an inhibitor of reverse-mode NCX1) and NCX1 knockdown significantly inhibited serum-induced VSMC proliferation (65% at 72 hours and 41% at 72 hours, respectively), determined according to PCNA and Ki-67 expression and cell counting in vitro, and markedly suppressed store depletion-mediated Ca2+ entry and peripheral cytosolic Na+ transients in VSMCs. CONCLUSIONS Reverse-mode NCX1 is activated by store depletion and is required for proliferative VSMC proliferation and neointima formation after arterial injury.
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Affiliation(s)
- Bei Liu
- Department of Obstetrics and Gynecology, Kunming General Hospital, Kunming, Yunnan, China
| | - Bin Zhang
- Division of Cardiovascular Surgery, and Department of Physiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Shiliang Huang
- Department of Cardiology, Kunming General Hospital, Kunming, Yunnan, China
| | - Lixia Yang
- Department of Cardiology, Kunming General Hospital, Kunming, Yunnan, China
| | - Carolyn M Roos
- Division of Cardiovascular Surgery, and Department of Physiology, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Y S Prakash
- Department of Anesthesiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Jie Zang
- Musculoskeletal Tumor Center, Peking University People's Hospital, Peking, China
| | - Jordan D Miller
- Division of Cardiovascular Surgery, and Department of Physiology, Mayo Clinic, Rochester, Minnesota, USA.
| | - Ruiwei Guo
- Department of Cardiology, Kunming General Hospital, Kunming, Yunnan, China.
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Zhang B, Liu B, Roos CM, Thompson MA, Prakash YS, Miller JD, Guo RW. TRPC6 and TRPC4 Heteromultimerization Mediates Store Depletion-Activated NCX1 Reversal in Proliferative Vascular Smooth Muscle Cells. Channels (Austin) 2018; 12:119-125. [PMID: 29560783 PMCID: PMC5972809 DOI: 10.1080/19336950.2018.1451696] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Store depletion has been shown to induce Ca2+ entry by Na+/Ca+ exchange (NCX) 1 reversal in proliferative vascular smooth muscle cells (VSMCs). The study objective was to investigate the role of transient receptor potential canonical (TRPC) channels in store depletion and NCX1 reversal in proliferative VSMCs. In cultured VSMCs, expressing TRPC1, TRPC4, and TRPC6, the removal of extracellular Na+ was followed by a significant increase of cytosolic Ca2+ concentration that was inhibited by KBR, a selective NCX1 inhibitor. TRPC1 knockdown significantly suppressed store-operated, channel-mediated Ca2+ entry, but TRPC4 knockdown and TRPC6 knockdown had no effect. Separate knockdown of TRPC1, TRPC4, or TRPC6 did not have a significant effect on thapsigargin-initiated Na+ increase in the peripheral regions with KBR treatment, but knockdown of both TRPC4 and TRPC6 did. Stromal interaction molecule (STIM)1 knockdown significantly reduced TRPC4 and TRPC6 binding. The results demonstrated that TRPC4–TRPC6 heteromultimerization linked Ca2+ store depletion and STIM1 accumulation with NCX reversal in proliferative VSMCs.
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Affiliation(s)
- Bin Zhang
- a Division of Cardiovascular Surgery, Mayo Clinic, Rochester, MN, USA; and Department of Physiology , Mayo Clinic , Rochester , MN , USA
| | - Bei Liu
- b Department of Obstetrics and Gynecology , Kunming General Hospital of Chengdu Military Command , Kunming , Yunnan , China
| | - Carolyn M Roos
- a Division of Cardiovascular Surgery, Mayo Clinic, Rochester, MN, USA; and Department of Physiology , Mayo Clinic , Rochester , MN , USA
| | - Michael A Thompson
- c Department of Anesthesiology , Mayo Clinic , Rochester , Minnesota , USA
| | - Y S Prakash
- c Department of Anesthesiology , Mayo Clinic , Rochester , Minnesota , USA
| | - Jordan D Miller
- a Division of Cardiovascular Surgery, Mayo Clinic, Rochester, MN, USA; and Department of Physiology , Mayo Clinic , Rochester , MN , USA
| | - Rui-Wei Guo
- d Department of Cardiology , Kunming General Hospital of Chengdu Military Command , Kunming , Yunnan , China
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Zhou JB, Sun YY, Zheng YL, Yu CQ, Lin HQ, Pang JY. A study on blocking store-operated Ca2+ entry in pulmonary arterial smooth muscle cells with xyloketals from marine fungi. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2017; 67:557-567. [PMID: 29337674 DOI: 10.1515/acph-2017-0032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/22/2017] [Indexed: 12/28/2022]
Abstract
In this study, the effect of four xyloketals 1-4 on store-operated calcium entry (SOCE) was investigated in primary distal pulmonary arterial smooth muscle cells (PASMCs) isolated from mice. The results showed that xyloketal A (1), an unusual ketal with C-3 symmetry, exhibited strong SOCE blocking activity. Secretion of interleukin-8 (IL-8) was also inhibited by xyloketal A. The parallel artificial membrane permeability assay (PAMPA) of 1-4 suggested that these xyloketals penetrated easily through the cell membrane. Moreover, the molecular docking study of xyloketal A with activation region of the stromal interaction molecule (STIM) 1 and the calcium release-activated calcium modulator (ORAI) 1 (STIM1-ORAI1) protein complex, the key domain of SOCE, revealed that xyloketal A exhibited a noncovalent interaction with the key residue lysine 363 (LYS363) in the identified cytosolic regions in STIM1-C. These findings provided useful information about xyloketal A as a SOCE inhibitor for further evaluation.
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Affiliation(s)
- Jie-Bin Zhou
- School of Chemistry Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Ying-Ying Sun
- Department of Guangdong Key Laboratory for New Pharmaceutical Dosage Forms GuangDong Pharmaceutical University, Guangzhou 510006, P. R. China
| | - Ying-Lin Zheng
- School of Chemistry Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Chu-Qin Yu
- Department of Guangdong Key Laboratory for New Pharmaceutical Dosage Forms GuangDong Pharmaceutical University, Guangzhou 510006, P. R. China
| | - Hua-Qing Lin
- Department of Guangdong Key Laboratory for New Pharmaceutical Dosage Forms GuangDong Pharmaceutical University, Guangzhou 510006, P. R. China
| | - Ji-Yan Pang
- School of Chemistry Sun Yat-Sen University, Guangzhou 510275, P. R. China
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Lu T, Zhou D, Gao P, Si L, Xu Q. Resveratrol attenuates high glucose-induced endothelial cell apoptosis via mediation of store-operated calcium entry. Mol Cell Biochem 2017. [DOI: 10.1007/s11010-017-3194-7 10.1007/s11010-017-3194-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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16
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Resveratrol attenuates high glucose-induced endothelial cell apoptosis via mediation of store-operated calcium entry. Mol Cell Biochem 2017; 442:73-80. [PMID: 28921392 DOI: 10.1007/s11010-017-3194-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 09/09/2017] [Indexed: 10/18/2022]
Abstract
The aim of this study was to evaluate the influence of resveratrol on HG-induced calcium entry in islet microvascular (MS-1) endothelial cells. MS-1 cells were pretreated with resveratrol or 2-APB (an inhibitor of store-operated calcium entry) and then incubated with high glucose. Cell viability was determined using the cell counting kit-8 method. Reactive oxygen species, endothelial apoptosis, and NO production were detected by DHE probe, TUNEL detection, and nitrate reductase assay kit. Protein levels of SOCE were detected by western blotting. Pretreatment with resveratrol significantly attenuated HG-induced endothelial apoptosis and improved cell viability. However, pretreatment with resveratrol and 2-APB abolished this effect, suggesting that the attenuation of HG-induced apoptosis by resveratrol may be associated with SOCE. Subsequent analyses indicated that HG induced the SOCE-related proteins, including TRPC1, Orai1, and Stim1. These results suggest that resveratrol pretreatment is associated with relieved HG-induced endothelial apoptosis at least partly via inhibition of SOCE-related proteins.
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Altered mitochondrial function, capacitative calcium entry and contractions in the aorta of hypertensive rats. J Hypertens 2017; 35:1594-1608. [PMID: 28403042 DOI: 10.1097/hjh.0000000000001360] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
OBJECTIVE It has been suggested that Ca entry through store-operated Ca channels (SOCs) is regulated by a dynamic interplay between the endoplasmic reticulum Ca stores and the mitochondria. These relationships drive the activation and inactivation of SOCs, yet it remains unclear whether this regulation of SOCs by mitochondria is altered in the aorta of spontaneously hypertensive rats (SHRs). METHODS We performed a thorough study of the mitochondrial membrane potential, the ability of mitochondria to deal with cytosolic Ca, capacitative Ca entry (CCE), and stromal interaction molecule 1 (STIM1) and calcium release-activated calcium modulator 1 (orai1) protein expression, as well as the contractile capacity of aortic rings, in normotensive Wistar Kyoto rats (WKYs) and SHRs. RESULTS Changes were observed in aortic tissue and cultured vascular smooth muscle cells isolated from SHRs relative to WKYs, including more depolarized mitochondria, stronger CCE upon the addition of Ca, larger cytosolic Ca transients (cytosolic Ca concentration) or aortic ring contraction elicited by endoplasmic reticulum depletion and a significant increase in STIM1 protein expression but not of orai1. CONCLUSION These results suggest that the impaired Ca buffering capacity of partially depolarized mitochondria dysregulates CCE, leading to overfilling of the endoplasmic reticulum Ca store through enhanced STIM1/orai1 interactions and an increase in aorta contractions in SHRs. Thus, understanding the implications of the alterations to STIM1/orai1, and their relationship to mitochondria, may aid drug development and therapeutic strategies to treat hypertension, as well as its long-term sequelae in poorly controlled patients.
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Tanwar J, Trebak M, Motiani RK. Cardiovascular and Hemostatic Disorders: Role of STIM and Orai Proteins in Vascular Disorders. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 993:425-452. [PMID: 28900927 DOI: 10.1007/978-3-319-57732-6_22] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Store-operated Ca2+ entry (SOCE) mediated by STIM and Orai proteins is a highly regulated and ubiquitous signaling pathway that plays an important role in various cellular and physiological functions. Endoplasmic reticulum (ER) serves as the major site for intracellular Ca2+ storage. Stromal Interaction Molecule 1/2 (STIM1/2) sense decrease in ER Ca2+ levels and transmits the message to plasma membrane Ca2+ channels constituted by Orai family members (Orai1/2/3) resulting in Ca2+ influx into the cells. This increase in cytosolic Ca2+ in turn activates a variety of signaling cascades to regulate a plethora of cellular functions. Evidence from the literature suggests that SOCE dysregulation is associated with several pathophysiologies, including vascular disorders. Interestingly, recent studies have suggested that STIM proteins may also regulate vascular functions independent of their contribution to SOCE. In this updated book chapter, we will focus on the physiological role of STIM and Orai proteins in the vasculature (endothelial cells and vascular smooth muscle cells). We will further retrospect the literature implicating a critical role for these proteins in vascular disease.
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Affiliation(s)
- Jyoti Tanwar
- Systems Biology Group, CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, 110020, India
| | - Mohamed Trebak
- Department of Cellular and Molecular Physiology, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA.
| | - Rajender K Motiani
- Systems Biology Group, CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, 110020, India.
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Groschner K, Shrestha N, Fameli N. Cardiovascular and Hemostatic Disorders: SOCE in Cardiovascular Cells: Emerging Targets for Therapeutic Intervention. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 993:473-503. [PMID: 28900929 DOI: 10.1007/978-3-319-57732-6_24] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The discovery of the store-operated Ca2+ entry (SOCE) phenomenon is tightly associated with its recognition as a pathway of high (patho)physiological significance in the cardiovascular system. Early on, SOCE has been investigated primarily in non-excitable cell types, and the vascular endothelium received particular attention, while a role of SOCE in excitable cells, specifically cardiac myocytes and pacemakers, was initially ignored and remains largely enigmatic even to date. With the recent gain in knowledge on the molecular components of SOCE as well as their cellular organization within nanodomains, potential tissue/cell type-dependent heterogeneity of the SOCE machinery along with high specificity of linkage to downstream signaling pathways emerged for cardiovascular cells. The basis of precise decoding of cellular Ca2+ signals was recently uncovered to involve correct spatiotemporal organization of signaling components, and even minor disturbances in these assemblies trigger cardiovascular pathologies. With this chapter, we wish to provide an overview on current concepts of cellular organization of SOCE signaling complexes in cardiovascular cells with particular focus on the spatiotemporal aspects of coupling to downstream signaling and the potential disturbance of these mechanisms by pathogenic factors. The significance of these mechanistic concepts for the development of novel therapeutic strategies will be discussed.
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Affiliation(s)
- Klaus Groschner
- Institute of Biophysics, Medical University of Graz, Neue Stiftingtalstrasse 6/4, 8010, Graz, Austria.
| | - Niroj Shrestha
- Institute of Biophysics, Medical University of Graz, Neue Stiftingtalstrasse 6/4, 8010, Graz, Austria
| | - Nicola Fameli
- Institute of Biophysics, Medical University of Graz, Neue Stiftingtalstrasse 6/4, 8010, Graz, Austria
- Department of Anesthesiology, Pharmacology, and Therapeutics, University of British Columbia, Vancouver, BC, Canada
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20
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Liu B, Yang L, Zhang B, Kuang C, Huang S, Guo R. NF-κB-Dependent Upregulation of NCX1 Induced by Angiotensin II Contributes to Calcium Influx in Rat Aortic Smooth Muscle Cells. Can J Cardiol 2016; 32:1356.e11-1356.e20. [DOI: 10.1016/j.cjca.2016.02.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 02/16/2016] [Accepted: 02/17/2016] [Indexed: 12/17/2022] Open
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Yang J, Yu J, Li D, Yu S, Ke J, Wang L, Wang Y, Qiu Y, Gao X, Zhang J, Huang L. Store-operated calcium entry-activated autophagy protects EPC proliferation via the CAMKK2-MTOR pathway in ox-LDL exposure. Autophagy 2016; 13:82-98. [PMID: 27791458 DOI: 10.1080/15548627.2016.1245261] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Improving biological functions of endothelial progenitor cells (EPCs) is beneficial to maintaining endothelium homeostasis and promoting vascular re-endothelialization. Because macroautophagy/autophagy has been documented as a double-edged sword in cell functions, its effects on EPCs remain to be elucidated. This study was designed to explore the role and molecular mechanisms of store-operated calcium entry (SOCE)-activated autophagy in proliferation of EPCs under hypercholesterolemia. We employed oxidized low-density lipoprotein (ox-LDL) to mimic hypercholesterolemia in bone marrow-derived EPCs from rat. Ox-LDL dose-dependently activated autophagy flux, while inhibiting EPC proliferation. Importantly, inhibition of autophagy either by silencing Atg7 or by 3-methyladenine treatment, further aggravated proliferative inhibition by ox-LDL, suggesting the protective effects of autophagy against ox-LDL. Interestingly, ox-LDL increased STIM1 expression and intracellular Ca2+ concentration. Either Ca2+ chelators or deficiency in STIM1 attenuated ox-LDL-induced autophagy activation, confirming the involvement of SOCE in the process. Furthermore, CAMKK2 (calcium/calmodulin-dependent protein kinase kinase 2, β) activation and MTOR (mechanistic target of rapamycin [serine/threonine kinase]) deactivation were associated with autophagy modulation. Together, our results reveal a novel signaling pathway of SOCE-CAMKK2 in the regulation of autophagy and offer new insights into the important roles of autophagy in maintaining proliferation and promoting the survival capability of EPCs. This may be beneficial to improving EPC transplantation efficacy and enhancing vascular re-endothelialization in patients with hypercholesterolemia.
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Affiliation(s)
- Jie Yang
- a Institute of Cardiovascular Diseases, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Jie Yu
- a Institute of Cardiovascular Diseases, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Dongdong Li
- a Institute of Cardiovascular Diseases, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Sanjiu Yu
- a Institute of Cardiovascular Diseases, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Jingbin Ke
- a Institute of Cardiovascular Diseases, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Lianyou Wang
- a Institute of Cardiovascular Diseases, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Yanwei Wang
- a Institute of Cardiovascular Diseases, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Youzhu Qiu
- a Institute of Cardiovascular Diseases, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Xubin Gao
- a Institute of Cardiovascular Diseases, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Jihang Zhang
- a Institute of Cardiovascular Diseases, Xinqiao Hospital, Third Military Medical University , Chongqing , China
| | - Lan Huang
- a Institute of Cardiovascular Diseases, Xinqiao Hospital, Third Military Medical University , Chongqing , China
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Brozovich FV, Nicholson CJ, Degen CV, Gao YZ, Aggarwal M, Morgan KG. Mechanisms of Vascular Smooth Muscle Contraction and the Basis for Pharmacologic Treatment of Smooth Muscle Disorders. Pharmacol Rev 2016; 68:476-532. [PMID: 27037223 PMCID: PMC4819215 DOI: 10.1124/pr.115.010652] [Citation(s) in RCA: 298] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The smooth muscle cell directly drives the contraction of the vascular wall and hence regulates the size of the blood vessel lumen. We review here the current understanding of the molecular mechanisms by which agonists, therapeutics, and diseases regulate contractility of the vascular smooth muscle cell and we place this within the context of whole body function. We also discuss the implications for personalized medicine and highlight specific potential target molecules that may provide opportunities for the future development of new therapeutics to regulate vascular function.
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Affiliation(s)
- F V Brozovich
- Department of Health Sciences, Boston University, Boston, Massachusetts (C.J.N., Y.Z.G., M.A., K.G.M.); Department of Medicine, Mayo Clinic, Rochester, Minnesota (F.V.B.); and Paracelsus Medical University Salzburg, Salzburg, Austria (C.V.D.)
| | - C J Nicholson
- Department of Health Sciences, Boston University, Boston, Massachusetts (C.J.N., Y.Z.G., M.A., K.G.M.); Department of Medicine, Mayo Clinic, Rochester, Minnesota (F.V.B.); and Paracelsus Medical University Salzburg, Salzburg, Austria (C.V.D.)
| | - C V Degen
- Department of Health Sciences, Boston University, Boston, Massachusetts (C.J.N., Y.Z.G., M.A., K.G.M.); Department of Medicine, Mayo Clinic, Rochester, Minnesota (F.V.B.); and Paracelsus Medical University Salzburg, Salzburg, Austria (C.V.D.)
| | - Yuan Z Gao
- Department of Health Sciences, Boston University, Boston, Massachusetts (C.J.N., Y.Z.G., M.A., K.G.M.); Department of Medicine, Mayo Clinic, Rochester, Minnesota (F.V.B.); and Paracelsus Medical University Salzburg, Salzburg, Austria (C.V.D.)
| | - M Aggarwal
- Department of Health Sciences, Boston University, Boston, Massachusetts (C.J.N., Y.Z.G., M.A., K.G.M.); Department of Medicine, Mayo Clinic, Rochester, Minnesota (F.V.B.); and Paracelsus Medical University Salzburg, Salzburg, Austria (C.V.D.)
| | - K G Morgan
- Department of Health Sciences, Boston University, Boston, Massachusetts (C.J.N., Y.Z.G., M.A., K.G.M.); Department of Medicine, Mayo Clinic, Rochester, Minnesota (F.V.B.); and Paracelsus Medical University Salzburg, Salzburg, Austria (C.V.D.)
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Li H, Jiang W, Liu Y, Jiang J, Zhang Y, Wu P, Zhao J, Duan X, Zhou X, Feng L. The metabolites of glutamine prevent hydroxyl radical-induced apoptosis through inhibiting mitochondria and calcium ion involved pathways in fish erythrocytes. Free Radic Biol Med 2016; 92:126-140. [PMID: 26795598 DOI: 10.1016/j.freeradbiomed.2016.01.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 01/12/2016] [Accepted: 01/12/2016] [Indexed: 12/12/2022]
Abstract
The present study explored the apoptosis pathways in hydroxyl radicals ((∙)OH)-induced carp erythrocytes. Carp erythrocytes were treated with the caspase inhibitors in physiological carp saline (PCS) or Ca(2+)-free PCS in the presence of 40μM FeSO4/20μM H2O2. The results showed that the generation of reactive oxygen species (ROS), the release of cytochrome c and DNA fragmentation were caspase-dependent, and Ca(2+) was involved in calpain activation and phosphatidylserine (PS) exposure in (∙)OH-induced carp erythrocytes. Moreover, the results suggested that caspases were involved in PS exposure, and Ca(2+) was involved in DNA fragmentation in (∙)OH-induced fish erythrocytes. These results demonstrated that there might be two apoptosis pathways in fish erythrocytes, one is the caspase and cytochrome c-dependent apoptosis that is similar to that in mammal nucleated cells, the other is the Ca(2+)-involved apoptosis that was similar to that in mammal non-nucleated erythrocytes. So, fish erythrocytes may be used as a model for studying oxidative stress and apoptosis in mammal cells. Furthermore, the present study investigated the effects of glutamine (Gln)'s metabolites [alanine (Ala), citrulline (Cit), proline (Pro) and their combination (Ala10Pro4Cit1)] on the pathways of apoptosis in fish erythrocytes. The results displayed that Ala, Cit, Pro and Ala10Pro4Cit1 effectively suppressed ROS generation, cytochrome c release, activation of caspase-3, caspase-8 and caspase-9 at the physiological concentrations, prevented Ca(2+) influx, calpain activation, PS exposure, DNA fragmentation and the degradation of the cytoskeleton and oxidation of membrane and hemoglobin (Hb) and increased activity of anti-hydroxyl radical (AHR) in (∙)OH-induced carp erythrocytes. Ala10Pro4Cit1 produced a synergistic effect of inhibited oxidative stress and apoptosis in fish erythrocytes. These results demonstrated that Ala, Cit, Pro and their combination can protect mammal erythrocytes and nucleated cells against oxidative stress and apoptosis. The studies supported the use of Gln, Ala, Cit and Pro as oxidative stress and apoptosis inhibitors in mammal cells and the hypothesis that the inhibited effects of Gln on oxidative stress and apoptosis are at least partly dependent on that of its metabolites in mammalian.
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Affiliation(s)
- Huatao Li
- Animal Nutrition Institute, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Conservation and Utilization of Fishes Resources in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province, Neijiang Normal University, Sichuan, Neijiang 641000, China
| | - Weidan Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of Ministry of Education, Sichuan Agricultural University, Sichuan, Chengdu 611130, China
| | - Yang Liu
- Animal Nutrition Institute, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of Ministry of Education, Sichuan Agricultural University, Sichuan, Chengdu 611130, China
| | - Jun Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of Ministry of Education, Sichuan Agricultural University, Sichuan, Chengdu 611130, China
| | - Yongan Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Pei Wu
- Animal Nutrition Institute, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of Ministry of Education, Sichuan Agricultural University, Sichuan, Chengdu 611130, China
| | - Juan Zhao
- Animal Nutrition Institute, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of Ministry of Education, Sichuan Agricultural University, Sichuan, Chengdu 611130, China
| | - Xudong Duan
- Animal Nutrition Institute, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of Ministry of Education, Sichuan Agricultural University, Sichuan, Chengdu 611130, China
| | - Xiaoqiu Zhou
- Animal Nutrition Institute, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of Ministry of Education, Sichuan Agricultural University, Sichuan, Chengdu 611130, China.
| | - Lin Feng
- Animal Nutrition Institute, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Sichuan, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of Ministry of Education, Sichuan Agricultural University, Sichuan, Chengdu 611130, China.
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Chen YW, Chen YF, Chen YT, Chiu WT, Shen MR. The STIM1-Orai1 pathway of store-operated Ca2+ entry controls the checkpoint in cell cycle G1/S transition. Sci Rep 2016; 6:22142. [PMID: 26917047 PMCID: PMC4768259 DOI: 10.1038/srep22142] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 02/08/2016] [Indexed: 01/10/2023] Open
Abstract
Ca(2+) signaling is important to trigger the cell cycle progression, while it remains elusive in the regulatory mechanisms. Here we show that store-operated Ca(2+) entry (SOCE), mediated by the interaction between STIM1 (an endoplasmic reticulum Ca(2+) sensor) and Orai1 (a cell membrane pore structure), controls the specific checkpoint of cell cycle. The fluctuating SOCE activity during cell cycle progression is universal in different cell types, in which SOCE is upregulated in G1/S transition and downregulated from S to G2/M transition. Pharmacological or siRNA inhibition of STIM1-Orai1 pathway of SOCE inhibits the phosphorylation of CDK2 and upregulates the expression of cyclin E, resulting in autophagy accompanied with cell cycle arrest in G1/S transition. The subsequently transient expression of STIM1 cDNA in STIM1(-/-) MEF rescues the phosphorylation and nuclear translocation of CDK2, suggesting that STIM1-mediated SOCE activation directly regulates CDK2 activity. Opposite to the important role of SOCE in controlling G1/S transition, the downregulated SOCE is a passive phenomenon from S to G2/M transition. This study uncovers SOCE-mediated Ca(2+) microdomain that is the molecular basis for the Ca(2+) sensitivity controlling G1/S transition.
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Affiliation(s)
- Yun-Wen Chen
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yih-Fung Chen
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.,PhD Program in Toxicology, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ying-Ting Chen
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wen-Tai Chiu
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Meng-Ru Shen
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Obstetrics and Gynecology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Advanced Optoelectronic Technology Center, College of Engineering, National Cheng Kung University, Tainan, Taiwan
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Wang LY, Zhang JH, Yu J, Yang J, Deng MY, Kang HL, Huang L. Reduction of Store-Operated Ca(2+) Entry Correlates with Endothelial Progenitor Cell Dysfunction in Atherosclerotic Mice. Stem Cells Dev 2015; 24:1582-90. [PMID: 25753987 DOI: 10.1089/scd.2014.0538] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The dysfunction of endothelial progenitor cells (EPCs) has been shown to prevent endothelial repair during the development of atherosclerosis (AS). Previous studies have revealed that store-operated calcium entry (SOCE) is an important factor in regulating EPC functions. However, whether this is also the mechanism in AS has not been elucidated. Therefore, we evaluated the role of SOCE in EPCs isolated from an atherosclerotic mouse model. Atheromatous plaques were more frequent in the aortas of ApoE(-/-) mice fed a high-fat diet for 16 weeks compared with controls, and the proliferative and migratory activities of atherosclerotic EPCs were significantly decreased. Accordingly, SOCE amplitude, as well as spontaneous or VEGF-induced Ca(2+) oscillations, decreased in atherosclerotic EPCs. These results may be associated with the downregulated expression of Stim1, Orai1, and TRPC1, which are major mediators of SOCE. In addition, eNOS expression and phosphorylation at Ser(1177), which are critical regulators of EPC function, were markedly reduced in the atherosclerotic EPCs. The impairment of eNOS activity could also be induced by using an SOCE inhibitor or by Stim1 gene silencing, indicating a link between the activities of eNOS and SOCE in AS. Furthermore, decreased SOCE function inhibited EPC proliferation and migration in vitro. In conclusion, our results showed that the reduction of SOCE induced EPC dysfunction during AS, potentially through downregulation of store-operated calcium channel (SOCC) components and impaired eNOS activity. Approaches aimed at reestablishing SOCE activity may thus improve the function of EPCs during AS.
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Affiliation(s)
- Lian-You Wang
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University , Chongqing, People's Republic of China
| | - Ji-Hang Zhang
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University , Chongqing, People's Republic of China
| | - Jie Yu
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University , Chongqing, People's Republic of China
| | - Jie Yang
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University , Chongqing, People's Republic of China
| | - Meng-Yang Deng
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University , Chongqing, People's Republic of China
| | - Hua-Li Kang
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University , Chongqing, People's Republic of China
| | - Lan Huang
- Institute of Cardiovascular Diseases of PLA, Xinqiao Hospital, Third Military Medical University , Chongqing, People's Republic of China
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26
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Cong XP, Wang WH, Zhu X, Jin C, Liu L, Li XM. Silence of STIM1 attenuates the proliferation and migration of EPCs after vascular injury and its mechanism. ASIAN PAC J TROP MED 2015; 7:373-7. [PMID: 25063063 DOI: 10.1016/s1995-7645(14)60058-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 01/15/2014] [Accepted: 02/15/2014] [Indexed: 11/30/2022] Open
Abstract
OBJECTIVE To investigate the effect of stromal interaction molecule 1(STIM1) knockdown on the proliferation and migration of endothelial progenitor cells (EPCs) after vascular injury and its mechanism. METHODS The rat bone marrow derived EPCs were divided into three groups: adenovirus negative control (group NSC), rat STIM1 adenovirus vector transfection group (group si/rSTIM1) and rat &human recombinant STIM1 adenovirus transfection group (group si/rSTIM1+hSTIM1). The STIM1 expressions in each group were detected by reverse transcription PCR after transfection; the cell proliferation was tested by [(3)H] thymidine incorporation assay ((3)H-TdR); Cell cycle was analyzed by flow cytometry; the cells' migration activity was detected by Boyden assay; Calcium ion concentration was detected by using laser confocal method. RESULTS 48 h later after transfection, the expression level of STIM1 in si/rSTIM1 cells was significantly lower than that in NSC group (0.21 ± 0.12 vs 1.01 ± 0.01, P<0.05); EPCs that stayed in G1 phase in si/rSTIM1 group [(93.31 ± 0.24)%] were significantly more than that in NSC group [(78.03 ± 0.34)%, P<0.05]; EPCs' migration activity in si/rSTIM1 group (10.03±0.33) was significantly lower than that in NSC group: (32.11 ± 0.54, P<0.05); EPCs calcium ion concentration changes in EPCs in si/rSTIM1 group (38.03 ± 0.13) was significantly lower than that in NSC group (98.11 ± 0.34, P<0.05). While there was no significant difference between si/rSTIM1+hSTIM1 group and NSC group on the four indexes above. CONCLUSIONS Silence of STIM1 attenuates EPCs proliferation and migration after vascular injury, by mediating the calcium ion concentration in EPCs.
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Affiliation(s)
- Xin-Peng Cong
- Affiliated Shanghai East Hospital of Tongji University, Shanghai 200120, China
| | - Wen-Hui Wang
- Affiliated Shanghai East Hospital of Tongji University, Shanghai 200120, China
| | - Xi Zhu
- Shanghai Zhoupu Hospital, Shanghai 201318, China
| | - Can Jin
- Shanghai Zhoupu Hospital, Shanghai 201318, China
| | - Liang Liu
- Shanghai Zhoupu Hospital, Shanghai 201318, China.
| | - Xin-Min Li
- Shanghai Zhoupu Hospital, Shanghai 201318, China.
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Fernandez RA, Wan J, Song S, Smith KA, Gu Y, Tauseef M, Tang H, Makino A, Mehta D, Yuan JXJ. Upregulated expression of STIM2, TRPC6, and Orai2 contributes to the transition of pulmonary arterial smooth muscle cells from a contractile to proliferative phenotype. Am J Physiol Cell Physiol 2015; 308:C581-93. [PMID: 25673771 DOI: 10.1152/ajpcell.00202.2014] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 01/27/2015] [Indexed: 11/22/2022]
Abstract
Pulmonary arterial hypertension (PAH) is a progressive disease that, if left untreated, eventually leads to right heart failure and death. Elevated pulmonary arterial pressure (PAP) in patients with PAH is mainly caused by an increase in pulmonary vascular resistance (PVR). Sustained vasoconstriction and excessive pulmonary vascular remodeling are two major causes for elevated PVR in patients with PAH. Excessive pulmonary vascular remodeling is mediated by increased proliferation of pulmonary arterial smooth muscle cells (PASMC) due to PASMC dedifferentiation from a contractile or quiescent phenotype to a proliferative or synthetic phenotype. Increased cytosolic Ca(2+) concentration ([Ca(2+)]cyt) in PASMC is a key stimulus for cell proliferation and this phenotypic transition. Voltage-dependent Ca(2+) entry (VDCE) and store-operated Ca(2+) entry (SOCE) are important mechanisms for controlling [Ca(2+)]cyt. Stromal interacting molecule proteins (e.g., STIM2) and Orai2 both contribute to SOCE and we have previously shown that STIM2 and Orai2, specifically, are upregulated in PASMC from patients with idiopathic PAH and from animals with experimental pulmonary hypertension in comparison to normal controls. In this study, we show that STIM2 and Orai2 are upregulated in proliferating PASMC compared with contractile phenotype of PASMC. Additionally, a switch in Ca(2+) regulation is observed in correlation with a phenotypic transition from contractile PASMC to proliferative PASMC. PASMC in a contractile phenotype or state have increased VDCE, while in the proliferative phenotype or state PASMC have increased SOCE. The data from this study indicate that upregulation of STIM2 and Orai2 is involved in the phenotypic transition of PASMC from a contractile state to a proliferative state; the enhanced SOCE due to upregulation of STIM2 and Orai2 plays an important role in PASMC proliferation.
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Affiliation(s)
- Ruby A Fernandez
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois; Department of Medicine, University of Illinois at Chicago, Chicago, Ilinois; Division of Translational and Regenerative Medicine, Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona; and
| | - Jun Wan
- Department of Medicine, University of Illinois at Chicago, Chicago, Ilinois
| | - Shanshan Song
- Department of Medicine, University of Illinois at Chicago, Chicago, Ilinois; Division of Translational and Regenerative Medicine, Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona; and
| | - Kimberly A Smith
- Department of Medicine, University of Illinois at Chicago, Chicago, Ilinois
| | - Yali Gu
- Division of Translational and Regenerative Medicine, Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona; and
| | - Mohammad Tauseef
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - Haiyang Tang
- Division of Translational and Regenerative Medicine, Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona; and
| | - Ayako Makino
- Department of Medicine, University of Illinois at Chicago, Chicago, Ilinois; Department of Physiology, The University of Arizona College of Medicine, Tucson, Arizona
| | - Dolly Mehta
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois
| | - Jason X-J Yuan
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois; Department of Medicine, University of Illinois at Chicago, Chicago, Ilinois; Division of Translational and Regenerative Medicine, Department of Medicine, The University of Arizona College of Medicine, Tucson, Arizona; and Department of Physiology, The University of Arizona College of Medicine, Tucson, Arizona
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Zhang W, Zhang X, González-Cobos JC, Stolwijk JA, Matrougui K, Trebak M. Leukotriene-C4 synthase, a critical enzyme in the activation of store-independent Orai1/Orai3 channels, is required for neointimal hyperplasia. J Biol Chem 2014; 290:5015-5027. [PMID: 25540197 DOI: 10.1074/jbc.m114.625822] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Leukotriene-C4 synthase (LTC4S) generates LTC4 from arachidonic acid metabolism. LTC4 is a proinflammatory factor that acts on plasma membrane cysteinyl leukotriene receptors. Recently, however, we showed that LTC4 was also a cytosolic second messenger that activated store-independent LTC4-regulated Ca(2+) (LRC) channels encoded by Orai1/Orai3 heteromultimers in vascular smooth muscle cells (VSMCs). We showed that Orai3 and LRC currents were up-regulated in medial and neointimal VSMCs after vascular injury and that Orai3 knockdown inhibited LRC currents and neointimal hyperplasia. However, the role of LTC4S in neointima formation remains unknown. Here we show that LTC4S knockdown inhibited LRC currents in VSMCs. We performed in vivo experiments where rat left carotid arteries were injured using balloon angioplasty to cause neointimal hyperplasia. Neointima formation was associated with up-regulation of LTC4S protein expression in VSMCs. Inhibition of LTC4S expression in injured carotids by lentiviral particles encoding shRNA inhibited neointima formation and inward and outward vessel remodeling. LRC current activation did not cause nuclear factor for activated T cells (NFAT) nuclear translocation in VSMCs. Surprisingly, knockdown of either LTC4S or Orai3 yielded more robust and sustained Akt1 and Akt2 phosphorylation on Ser-473/Ser-474 upon serum stimulation. LTC4S and Orai3 knockdown inhibited VSMC migration in vitro with no effect on proliferation. Akt activity was suppressed in neointimal and medial VSMCs from injured vessels at 2 weeks postinjury but was restored when the up-regulation of either LTC4S or Orai3 was prevented by shRNA. We conclude that LTC4S and Orai3 altered Akt signaling to promote VSMC migration and neointima formation.
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Affiliation(s)
- Wei Zhang
- From the The State University of New York College of Nanoscale Science and Engineering, Albany, New York 12203,; Center for Cardiovascular Sciences, Albany Medical College, Albany, New York 12208, and
| | - Xuexin Zhang
- From the The State University of New York College of Nanoscale Science and Engineering, Albany, New York 12203
| | - José C González-Cobos
- From the The State University of New York College of Nanoscale Science and Engineering, Albany, New York 12203,; Center for Cardiovascular Sciences, Albany Medical College, Albany, New York 12208, and
| | - Judith A Stolwijk
- From the The State University of New York College of Nanoscale Science and Engineering, Albany, New York 12203
| | - Khalid Matrougui
- Department of Physiological Sciences, East Virginia Medical School, Norfolk, Virginia 23507
| | - Mohamed Trebak
- From the The State University of New York College of Nanoscale Science and Engineering, Albany, New York 12203,; Center for Cardiovascular Sciences, Albany Medical College, Albany, New York 12208, and.
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STIM1, a direct target of microRNA-185, promotes tumor metastasis and is associated with poor prognosis in colorectal cancer. Oncogene 2014; 34:4808-20. [PMID: 25531324 PMCID: PMC4569941 DOI: 10.1038/onc.2014.404] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 10/21/2014] [Accepted: 11/04/2014] [Indexed: 01/01/2023]
Abstract
STIM1 (stromal interaction molecule 1), an endoplasmic reticulum Ca2+ sensor that triggers the store-operated Ca2+ entry activation, has recently been implicated in cancer progression. However, the role of STIM1 in the progression and metastasis of colorectal cancer (CRC) has not been addressed. In this study, we confirmed increased expression of STIM1 in highly invasive CRC cell lines. Enhanced expression of STIM1 promoted CRC cell metastasis in vitro and in vivo, whereas silencing of STIM1 with small interfering RNA resulted in reduced metastasis. Ectopic expression of STIM1 in CRC cells induced epithelial-to-mesenchymal transition (EMT), whereas silencing of STIM1 had the opposite effect. Furthermore, STIM1 expression was markedly higher in CRC tissues than in adjacent noncancerous tissues. STIM1 overexpression correlated with poor differentiation and higher tumor node metastasis stage. CRC patients with positive STIM1 expression had poorer prognoses than those with negative STIM1 expression. Moreover, STIM1 was found to be a direct target of miR-185, a microRNA (miRNA) that has not previously been reported to be involved in EMT, in both CRC tissues and cell lines. Taken together, these findings demonstrate for the first time that STIM1 promotes metastasis and is associated with cancer progression and poor prognosis in patients with CRC. In addition, we show that expression of STIM1 is regulated by a posttranscriptional regulatory mechanism mediated by a new EMT-related miRNA. This novel miR-185–STIM1 axis promotes CRC metastasis and may be a candidate biomarker for prognosis and a target for new therapies.
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30
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Stewart TA, Yapa KTDS, Monteith GR. Altered calcium signaling in cancer cells. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1848:2502-11. [PMID: 25150047 DOI: 10.1016/j.bbamem.2014.08.016] [Citation(s) in RCA: 238] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 08/11/2014] [Indexed: 01/03/2023]
Abstract
It is the nature of the calcium signal, as determined by the coordinated activity of a suite of calcium channels, pumps, exchangers and binding proteins that ultimately guides a cell's fate. Deregulation of the calcium signal is often deleterious and has been linked to each of the 'cancer hallmarks'. Despite this, we do not yet have a full understanding of the remodeling of the calcium signal associated with cancer. Such an understanding could aid in guiding the development of therapies specifically targeting altered calcium signaling in cancer cells during tumorigenic progression. Findings from some of the studies that have assessed the remodeling of the calcium signal associated with tumorigenesis and/or processes important in invasion and metastasis are presented in this review. The potential of new methodologies is also discussed. This article is part of a Special Issue entitled: Membrane channels and transporters in cancers.
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Affiliation(s)
- Teneale A Stewart
- School of Pharmacy, The University of Queensland, Brisbane, Queensland, Australia
| | - Kunsala T D S Yapa
- School of Pharmacy, The University of Queensland, Brisbane, Queensland, Australia
| | - Gregory R Monteith
- School of Pharmacy, The University of Queensland, Brisbane, Queensland, Australia.
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31
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Kassan M, Zhang W, Aissa KA, Stolwijk J, Trebak M, Matrougui K. Differential role for stromal interacting molecule 1 in the regulation of vascular function. Pflugers Arch 2014; 467:1195-202. [PMID: 24965067 DOI: 10.1007/s00424-014-1556-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 06/07/2014] [Accepted: 06/10/2014] [Indexed: 01/16/2023]
Abstract
We determined the in vivo role of stromal-interacting molecule 1 (STIM1) in the regulation of vascular function using endothelial cell (EC)- and smooth-muscle (SM)-specific knockout mice. Systolic blood pressure and glucose levels were similar in all mice (Stim1(SMC-/-), Stim1(SMC-/+), Stim1(EC-/-), Stim1(EC-/+)), but body weight was reduced in Stim1(EC-/-) and Stim1(SMC-/-) mice. The contraction of arteries in response to phenylephrine was significantly reduced in Stim1(SMC-/-) mice only. However, contraction to thromboxane and KCl was similar in all groups. The endothelium-dependent relaxation (EDR) was impaired in Stim1(EC-/+) and drastically reduced in Stim1(EC-/-) mice while the endothelium-independent vasorelaxation was similar among all groups. Acute downregulation of STIM1 in arteries reduced EDR and the contractile response to phenylephrine, while the contractile response to thromboxane was not affected. NADPH oxidase activity was increased only in Stim1(EC-/+) and Stim1(EC-/-) mice. Calcium (Ca(2+)) entry in endothelial cells stimulated with thrombin and histamine had the pharmacological features of store-operated Ca(2+) entry (SOCE) and was dependent on STIM1 expression. We conclude that STIM1 plays opposing roles in vascular smooth muscle vs. endothelial cells in the regulation of vascular reactivity.
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Affiliation(s)
- Modar Kassan
- Department of Physiological Sciences, EVMS, Norfolk, VA, 23501, USA
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32
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Activation of liver X receptor enhances the proliferation and migration of endothelial progenitor cells and promotes vascular repair through PI3K/Akt/eNOS signaling pathway activation. Vascul Pharmacol 2014; 62:150-61. [PMID: 24892989 DOI: 10.1016/j.vph.2014.05.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 04/21/2014] [Accepted: 05/26/2014] [Indexed: 11/23/2022]
Abstract
Vascular endothelial injury is a major cause of many cardiovascular diseases. The proliferation and migration of endothelial progenitor cells (EPCs) play a pivotal role in endothelial regeneration and repair after vascular injury. Recently, liver X receptor (LXR) activation has been suggested as a potential target for novel therapeutic interventions in the treatment of cardiovascular disease. However, the effects of LXR activation on endothelial regeneration and repair, as well as EPC function, have not been investigated. In the present study, we demonstrate that LXRs, including LXRα and LXRβ, are expressed and functional in rat bone marrow-derived EPCs. Treatment with an LXR agonist, TO901317 (TO) or GW3965 (GW), significantly increased the proliferation and migration of EPCs, as well as Akt and eNOS phosphorylation in EPCs. Moreover, LXR agonist treatment enhanced the expression and secretion of vascular endothelial growth factor in EPCs. LXR agonists accelerated re-endothelialization in injured mouse carotid arteries in vivo. These data confirm that LXR activation may improve EPC function and endothelial regeneration and repair after vascular injury by activating the PI3K/Akt/eNOS pathway. We conclude that LXRs may be attractive targets for drug development in the treatment of cardiovascular diseases associated with vascular injury.
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Billaud M, Lohman AW, Johnstone SR, Biwer LA, Mutchler S, Isakson BE. Regulation of cellular communication by signaling microdomains in the blood vessel wall. Pharmacol Rev 2014; 66:513-69. [PMID: 24671377 DOI: 10.1124/pr.112.007351] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
It has become increasingly clear that the accumulation of proteins in specific regions of the plasma membrane can facilitate cellular communication. These regions, termed signaling microdomains, are found throughout the blood vessel wall where cellular communication, both within and between cell types, must be tightly regulated to maintain proper vascular function. We will define a cellular signaling microdomain and apply this definition to the plethora of means by which cellular communication has been hypothesized to occur in the blood vessel wall. To that end, we make a case for three broad areas of cellular communication where signaling microdomains could play an important role: 1) paracrine release of free radicals and gaseous molecules such as nitric oxide and reactive oxygen species; 2) role of ion channels including gap junctions and potassium channels, especially those associated with the endothelium-derived hyperpolarization mediated signaling, and lastly, 3) mechanism of exocytosis that has considerable oversight by signaling microdomains, especially those associated with the release of von Willebrand factor. When summed, we believe that it is clear that the organization and regulation of signaling microdomains is an essential component to vessel wall function.
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Affiliation(s)
- Marie Billaud
- Dept. of Molecular Physiology and Biophysics, University of Virginia School of Medicine, PO Box 801394, Charlottesville, VA 22902.
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Trebak M, Zhang W, Ruhle B, Henkel MM, González-Cobos JC, Motiani RK, Stolwijk JA, Newton RL, Zhang X. What role for store-operated Ca²⁺ entry in muscle? Microcirculation 2013; 20:330-6. [PMID: 23312019 DOI: 10.1111/micc.12042] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Accepted: 01/08/2013] [Indexed: 12/13/2022]
Abstract
Store-operated Ca²⁺ entry (SOCE) is a receptor-regulated Ca²⁺ entry pathway that is both ubiquitous and evolutionarily conserved. SOCE is activated by depletion of intracellular Ca²⁺ stores through receptor-mediated production of inositol 1,4,5-trisphosphate (IP₃). The depletion of endoplasmic reticulum (ER) Ca²⁺ is sensed by stromal interaction molecule 1 (STIM1). On store depletion, STIM1 aggregates and moves to areas where the ER comes close to the plasma membrane (PM; within 25 nm) to interact with Orai1 channels and activate Ca²⁺ entry. Ca²⁺ entry through store-operated Ca²⁺ (SOC) channels, originally thought to mediate the replenishment of Ca²⁺ stores, participate in active downstream signaling by coupling to the activation of enzymes and transcription factors that control a wide variety of long-term cell functions such as proliferation, growth, and migration. SOCE has also been proposed to contribute to short-term cellular responses such as muscle contractility. While there are significant STIM1/Orai1 protein levels and SOCE activity in adult skeletal muscle, the precise role of SOCE in skeletal muscle contractility is not clear. The dependence on SOCE during cardiac and smooth muscle contractility is even less certain. Here, we will hypothesize on the contribution of SOCE in muscle and its potential role in contractility and signaling.
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Affiliation(s)
- Mohamed Trebak
- Nanobioscience Constellation, College of Nanoscale Science and Engineering-CNSE, University at Albany, State University of New York, Albany, New York, USA.
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35
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Intracellular Ca2+ remodeling during the phenotypic journey of human coronary smooth muscle cells. Cell Calcium 2013; 54:375-85. [DOI: 10.1016/j.ceca.2013.08.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 08/26/2013] [Accepted: 08/31/2013] [Indexed: 11/23/2022]
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36
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Zhang Y, Huang L, Zuo Z, Chen Y, Wang C. Phenanthrene exposure causes cardiac arrhythmia in embryonic zebrafish via perturbing calcium handling. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 142-143:26-32. [PMID: 23948075 DOI: 10.1016/j.aquatox.2013.07.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 07/18/2013] [Accepted: 07/19/2013] [Indexed: 06/02/2023]
Abstract
Phenanthrene (Phe) is one of the most abundant and ubiquitous polycyclic aromatic hydrocarbons in the aquatic environment. It is known that Phe has cardiotoxic effects, but knowledge concerning the mechanism of cardiac dysfunction caused by Phe is still limited. In this study, zebrafish embryos were exposed to environmentally relevant concentrations of Phe, and an increase of an irregular rhythm was observed in Phe treated embryos. Disordered calcium (Ca(2+)) handling characterized by impaired sarcoplasmic reticulum Ca(2+) uptake, and obvious Ca(2+) accumulation in the cytoplasm was observed in rat embryonic cardiac myoblasts (H9C2) exposed to Phe. The mRNA level as well as protein expression of the SERCA2a Ca(2+) pump in zebrafish hearts or H9C2 cells was significantly decreased by Phe exposure. The activity of Ca(2+)-ATPase in H9C2 cells was inhibited by Phe. Both the mRNA and protein levels of TBX5, a direct regulator of SERCA2a, were significantly decreased by Phe exposure. These results suggested that exposure to Phe could lead to arrhythmia in zebrafish embryos via perturbing the calcium handling pathway.
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Affiliation(s)
- Youyu Zhang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, PR China
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37
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Yang IH, Tsai YT, Chiu SJ, Liu LT, Lee HH, Hou MF, Hsu WL, Chen BK, Chang WC. Involvement of STIM1 and Orai1 in EGF-mediated cell growth in retinal pigment epithelial cells. J Biomed Sci 2013; 20:41. [PMID: 23800047 PMCID: PMC3700824 DOI: 10.1186/1423-0127-20-41] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Accepted: 06/18/2013] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND In non-excitable cells, one major route for calcium entry is through store-operated calcium (SOC) channels in the plasma membrane. These channels are activated by the emptying of intracellular Ca²⁺ store. STIM1 and Orai1 are major regulators of SOC channels. In this study, we explored the functions of STIM1 and Orai1 in epidermal growth factor (EGF)-induced cell proliferation and migration in retinal pigment epithelial cells (ARPE-19 cell line). RESULTS EGF triggers cell proliferation and migration in ARPE-19 cells. Cell proliferation and migration involve STIM1 and Orai1, as well as phosphorylation of extracellular signal-regulated protein kinase (ERK) 1/2, and Akt. Pharmacological inhibitors of SOC channels and siRNA of Orai1 and STIM1 suppress cell proliferation and migration. Pre-treatment of mitogen-activated protein kinase kinase (MEK) inhibitors and a phosphatidylinositol 3 kinases (PI3K) inhibitor attenuated cell proliferation and migration. However, inhibition of the SOC channels failed to prevent EGF-mediated ERK 1/2 and Akt phosphorylation. CONCLUSIONS Our results showed that STIM1, Orai1, ERK 1/2, and Akt are key determinants of EGF-mediated cell growth in ARPE-19 cells. EGF is a potent growth molecule that has been linked to the development of PVR, and therefore, STIM1, Orai1, as well as the MEK/ERK 1/2 and PI3K/Akt pathways, might be potential therapeutic targets for drugs aimed at treating such disorders.
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Affiliation(s)
- I-Hui Yang
- Department of Medical Genetics, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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Motiani RK, Stolwijk JA, Newton RL, Zhang X, Trebak M. Emerging roles of Orai3 in pathophysiology. Channels (Austin) 2013; 7:392-401. [PMID: 23695829 DOI: 10.4161/chan.24960] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Calcium (Ca(2+)) is a ubiquitous second messenger that regulates a plethora of physiological functions. Deregulation of calcium homeostasis has been reported in a wide variety of pathological conditions including cardiovascular disorders, cancer and neurodegenerative diseases. One of the most ubiquitous pathways involved in regulated Ca(2+) influx into cells is the store-operated Ca(2+) entry (SOCE) pathway. In 2006, Orai1 was identified as the channel protein that mediates SOCE in immune cells. Orai1 has two mammalian homologs, Orai2 and Orai3. Although Orai1 has been the most widely studied Orai isoform, Orai3 has recently received significant attention. Under native conditions, Orai3 was demonstrated to be an important component of store-independent arachidonate-regulated Ca(2+) (ARC) entry in HEK293 cells, and more recently of a store-independent leukotrieneC4-regulated Ca(2+) (LRC) entry pathway in vascular smooth muscle cells. Recent studies have shown upregulation of Orai3 in estrogen receptor-expressing breast cancers and a critical role for Orai3 in breast cancer development in immune-compromised mice. Orai3 upregulation was also shown to contribute to vascular smooth muscle remodeling and neointimal hyperplasia caused by vascular injury. Furthermore, Orai3 has been shown to contribute to proliferation of effector T-lymphocytes under oxidative stress. In this review, we will discuss the role of Orai3 in reported pathophysiological conditions and will contribute ideas on the potential role of Orai3 in native Ca(2+) signaling pathways and human disease.
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Affiliation(s)
- Rajender K Motiani
- Nanobioscience Constellation; College of Nanoscale Science and Engineering (CNSE); University at Albany; State University of New York; Albany, NY USA; DST-INSPIRE Faculty; Institute of Genomics and Integrative Biology (IGIB); New Delhi, India
| | - Judith A Stolwijk
- Nanobioscience Constellation; College of Nanoscale Science and Engineering (CNSE); University at Albany; State University of New York; Albany, NY USA
| | - Rachel L Newton
- Nanobioscience Constellation; College of Nanoscale Science and Engineering (CNSE); University at Albany; State University of New York; Albany, NY USA
| | - Xuexin Zhang
- Nanobioscience Constellation; College of Nanoscale Science and Engineering (CNSE); University at Albany; State University of New York; Albany, NY USA
| | - Mohamed Trebak
- Nanobioscience Constellation; College of Nanoscale Science and Engineering (CNSE); University at Albany; State University of New York; Albany, NY USA
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Hooper R, Samakai E, Kedra J, Soboloff J. Multifaceted roles of STIM proteins. Pflugers Arch 2013; 465:1383-96. [PMID: 23568369 DOI: 10.1007/s00424-013-1270-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 03/11/2013] [Accepted: 03/12/2013] [Indexed: 12/21/2022]
Abstract
Stromal interaction molecules (STIM1 and STIM2) are critical components of store-operated calcium entry. Sensing depletion of endoplasmic reticulum (ER) Ca(2+) stores, STIM couples with plasma membrane Orai channels, resulting in the influx of Ca(2+) across the PM into the cytosol. Although best recognized for their primary role as ER Ca(2+) sensors, increasing evidence suggests that STIM proteins have a broader variety of sensory capabilities than first envisaged, reacting to cell stressors such as oxidative stress, temperature, and hypoxia. Further, the array of partners for STIM proteins is now understood to range far beyond the Orai channel family. Here we discuss the implications of STIM's expanding role, both as a stress sensor and a general modulator of multiple physiological processes in the cell.
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Affiliation(s)
- Robert Hooper
- Department of Biochemistry, Temple University School of Medicine, 3440 North Broad Street, Philadelphia, PA, 19140, USA
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Bergmeier W, Weidinger C, Zee I, Feske S. Emerging roles of store-operated Ca²⁺ entry through STIM and ORAI proteins in immunity, hemostasis and cancer. Channels (Austin) 2013; 7:379-91. [PMID: 23511024 DOI: 10.4161/chan.24302] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Store-operated Ca(2+) entry (SOCE) is an important Ca(2+) influx pathway, which is defined by the fact that depletion of intracellular Ca(2+) stores, mainly the endoplasmic reticulum (ER), triggers the opening of Ca(2+) channels in the plasma membrane. The best characterized SOC channel is the Ca(2+) release-activated Ca(2+) (CRAC) channel, which was first described in cells of the immune system but has since been reported in many different cell types. CRAC channels are multimers of ORAI family proteins, of which ORAI1 is the best characterized. They are activated by stromal interaction molecules (STIM) 1 and 2, which respond to the depletion of intracellular Ca(2+) stores with oligomerization and binding to ORAI proteins. The resulting SOCE is critical for the physiological function of many cell types including immune cells and platelets. Recent studies using cell lines, animal models and primary cells from human patients with defects in SOCE have highlighted the importance of this Ca(2+) entry mechanism in a variety of pathophysiological processes. This review focuses on the role of SOCE in immunity to infection, allergy, hemostasis and cancer.
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Affiliation(s)
- Wolfgang Bergmeier
- Department of Biochemistry and Biophysics; McAllister Heart Institute; University of North Carolina; Chapel Hill, NC USA
| | - Carl Weidinger
- Department of Pathology; New York University Langone Medical Center; New York, NY USA
| | - Isabelle Zee
- Department of Pathology; New York University Langone Medical Center; New York, NY USA
| | - Stefan Feske
- Department of Pathology; New York University Langone Medical Center; New York, NY USA
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Merlet E, Atassi F, Motiani RK, Mougenot N, Jacquet A, Nadaud S, Capiod T, Trebak M, Lompré AM, Marchand A. miR-424/322 regulates vascular smooth muscle cell phenotype and neointimal formation in the rat. Cardiovasc Res 2013; 98:458-68. [PMID: 23447642 DOI: 10.1093/cvr/cvt045] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
AIMS Our aim was to identify new microRNAs (miRNAs) implicated in pathological vascular smooth muscle cells (VSMCs) proliferation and characterize their mechanism of action. METHODS AND RESULTS MicroRNAs microarray and qRT-PCR results lead us to focus on miR-424 or its rat ortholog miR-322 (miR-424/322). In vitro mir-424/322 level was decreased shortly after the induction of proliferation and increased in a time-dependent manner later on. In vivo its expression increased in the rat carotid artery from Day 4 up to Day 30 after injury. miR-424/322 overexpression in vitro inhibited proliferation and migration without affecting apoptosis and prevented VSMC dedifferentiation. Furthermore, miR-424/322 overexpression resulted in decreased expression of its predicted targets: cyclin D1 and Ca(2+)-regulating proteins calumenin and stromal-interacting molecule 1 (STIM1). Using reporter luciferase assays, we confirmed that cyclin D1 and calumenin mRNAs were direct targets of miR-322, whereas miR-322 effect on STIM1 was indirect. Nevertheless, consistent with the decreased STIM1 level, the store-operated Ca(2+) entry was reduced. We hypothesized that miR-424/322 could be a negative regulator of proliferation overridden in pathological situations. Thus, we overexpressed miR-424/322 in injured rat carotid arteries using an adenovirus, and demonstrated a protective effect against restenosis. CONCLUSION Our results demonstrate that miR-424/322 is up-regulated after vascular injury. This is likely an adaptive response to counteract proliferation, although this mechanism is overwhelmed in pathological situations such as injury-induced restenosis.
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Affiliation(s)
- Elise Merlet
- INSERM UMRS 956, Faculté de Médecine Pierre et Marie Curie, 91 boulevard de l'Hôpital, 75634, Paris Cedex 13, France
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González-Cobos JC, Zhang X, Zhang W, Ruhle B, Motiani RK, Schindl R, Muik M, Spinelli AM, Bisaillon JM, Shinde AV, Fahrner M, Singer HA, Matrougui K, Barroso M, Romanin C, Trebak M. Store-independent Orai1/3 channels activated by intracrine leukotriene C4: role in neointimal hyperplasia. Circ Res 2013; 112:1013-25. [PMID: 23349245 DOI: 10.1161/circresaha.111.300220] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
RATIONALE Through largely unknown mechanisms, Ca(2+) signaling plays important roles in vascular smooth muscle cell (VSMC) remodeling. Orai1-encoded store-operated Ca(2+) entry has recently emerged as an important player in VSMC remodeling. However, the role of the exclusively mammalian Orai3 protein in native VSMC Ca(2+) entry pathways, its upregulation during VSMC remodeling, and its contribution to neointima formation remain unknown. OBJECTIVE The goal of this study was to determine the agonist-evoked Ca(2+) entry pathway contributed by Orai3; Orai3 potential upregulation and role during neointima formation after balloon injury of rat carotid arteries. METHODS AND RESULTS Ca(2+) imaging and patch-clamp recordings showed that although the platelet-derived growth factor activates the canonical Ca(2+) release-activated Ca(2+) channels via store depletion in VSMC, the pathophysiological agonist thrombin activates a distinct Ca(2+)-selective channel contributed by Orai1, Orai3, and stromal interacting molecule1 in the same cells. Unexpectedly, Ca(2+) store depletion is not required for activation of Orai1/3 channel by thrombin. Rather, the signal for Orai1/3 channel activation is cytosolic leukotrieneC4 produced downstream thrombin receptor stimulation through the catalytic activity of leukotrieneC4 synthase. Importantly, Orai3 is upregulated in an animal model of VSMC neointimal remodeling, and in vivo Orai3 knockdown inhibits neointima formation. CONCLUSIONS These results demonstrate that distinct native Ca(2+)-selective Orai channels are activated by different agonists/pathways and uncover a mechanism whereby leukotrieneC4 acts through hitherto unknown intracrine mode to elicit store-independent Ca(2+) signaling that promotes vascular occlusive disease. Orai3 and Orai3-containing channels provide novel targets for control of VSMC remodeling during vascular injury or disease.
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Affiliation(s)
- José C González-Cobos
- College of Nanoscale Science and Engineering, NFE4417, University at Albany, State University of New York, 257 Fuller Rd, Albany, NY 12203, USA.
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Ruhle B, Trebak M. Emerging roles for native Orai Ca2+ channels in cardiovascular disease. CURRENT TOPICS IN MEMBRANES 2013; 71:209-35. [PMID: 23890117 DOI: 10.1016/b978-0-12-407870-3.00009-3] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Orai proteins form highly calcium (Ca(2+))-selective channels located in the plasma membrane of both nonexcitable and excitable cells, where they make important contributions to many cellular processes. The well-characterized Ca(2+) release-activated Ca(2+) current is mediated by Orai1 multimers and is activated, upon depletion of inositol 1,4,5-trisphosphate-sensitive stores, by direct interaction of Orai1 with the endoplasmic reticulum Ca(2+) sensor, stromal interaction molecule 1 (STIM1). This pathway is known as capacitative Ca(2+) entry or store-operated Ca(2+) entry. While most investigations have focused on STIM1 and Orai1 in their store-dependent mode, emerging evidence suggests that Orai1 and Orai3 heteromultimeric channels can form store-independent Ca(2+)-selective channels. The role of store-dependent and store-independent channels in excitation-transcription coupling and the pathological remodeling of the cardiovascular system are beginning to come forth. Recent evidence suggests that STIM/Orai-generated Ca(2+) signaling couples to gene transcription and subsequent phenotypic changes associated with the processes of cardiac and vascular remodeling. This short review will explore the contributions of native Orai channels to heart and vessel physiology and their role in cardiovascular diseases.
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Affiliation(s)
- Brian Ruhle
- Nanobioscience Constellation, The College of Nanoscale Science and Engineering, University at Albany-State University of New York, Albany, NY, USA
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44
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Mancarella S, Potireddy S, Wang Y, Gao H, Gandhirajan RK, Autieri M, Scalia R, Cheng Z, Wang H, Madesh M, Houser SR, Gill DL. Targeted STIM deletion impairs calcium homeostasis, NFAT activation, and growth of smooth muscle. FASEB J 2012; 27:893-906. [PMID: 23159931 DOI: 10.1096/fj.12-215293] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The Ca(2+)-sensing stromal interaction molecule (STIM) proteins are crucial Ca(2+) signal coordinators. Cre-lox technology was used to generate smooth muscle (sm)-targeted STIM1-, STIM2-, and double STIM1/STIM2-knockout (KO) mouse models, which reveal the essential role of STIM proteins in Ca(2+) homeostasis and their crucial role in controlling function, growth, and development of smooth muscle cells (SMCs). Compared to Cre(+/-) littermates, sm-STIM1-KO mice showed high mortality (50% by 30 d) and reduced bodyweight. While sm-STIM2-KO was without detectable phenotype, the STIM1/STIM double-KO was perinatally lethal, revealing an essential role of STIM1 partially rescued by STIM2. Vascular and intestinal smooth muscle tissues from sm-STIM1-KO mice developed abnormally with distended, thinned morphology. While depolarization-induced aortic contraction was unchanged in sm-STIM1-KO mice, α1-adrenergic-mediated contraction was 26% reduced, and store-dependent contraction almost eliminated. Neointimal formation induced by carotid artery ligation was suppressed by 54%, and in vitro PDGF-induced proliferation was greatly reduced (79%) in sm-STIM1-KO. Notably, the Ca(2+) store-refilling rate in STIM1-KO SMCs was substantially reduced, and sustained PDGF-induced Ca(2+) entry was abolished. This defective Ca(2+) homeostasis prevents PDGF-induced NFAT activation in both contractile and proliferating SMCs. We conclude that STIM1-regulated Ca(2+) homeostasis is crucial for NFAT-mediated transcriptional control required for induction of SMC proliferation, development, and growth responses to injury.-Mancarella, S., Potireddy, S., Wang, Y., Gao, H., Gandhirajan, K., Autieri, M., Scalia, R., Cheng, Z., Wang, H., Madesh, M., Houser, S. R., Gill, D. L. Targeted STIM deletion impairs calcium homeostasis, NFAT activation, and growth of smooth muscle.
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Affiliation(s)
- Salvatore Mancarella
- Department of Biochemistry, Temple University School of Medicine, Philadelphia, PA 19140, USA.
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Yoshida J, Iwabuchi K, Matsui T, Ishibashi T, Masuoka T, Nishio M. Knockdown of stromal interaction molecule 1 (STIM1) suppresses store-operated calcium entry, cell proliferation and tumorigenicity in human epidermoid carcinoma A431 cells. Biochem Pharmacol 2012; 84:1592-603. [PMID: 23022228 DOI: 10.1016/j.bcp.2012.09.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Revised: 09/18/2012] [Accepted: 09/19/2012] [Indexed: 12/01/2022]
Abstract
Store-operated calcium (Ca(2+)) entry (SOCE) is important for cellular activities such as gene transcription, cell cycle progression and proliferation in most non-excitable cells. Stromal interaction molecule 1 (STIM1), a newly identified Ca(2+)-sensing protein, monitors the depletion of endoplasmic reticulum (ER) Ca(2+) stores and activates store-operated Ca(2+) channels at the plasma membrane to induce SOCE. To investigate the possible roles of STIM1 in tumor growth in relation to SOCE, we established STIM1 knockdown (KD) clones of human epidermoid carcinoma A431 cells by RNA interference. Thapsigargin, an inhibitor of ER Ca(2+)-ATPase, -induced and phospholipase C-coupled receptor agonist-induced SOCEs were reduced in two STIM1 KD clones compared to a negative control clone. Re-expression of a KD-resistant full-length STIM1, but not a Ca(2+) release-activated Ca(2+) channel activation domain (CAD)-deleted STIM1 mutant, in the KD clone restored the amplitude of SOCE, suggesting the specificity of the STIM1 knockdown. The cell growth of the STIM1 KD clones was slower than that of the negative control clone. DNA synthesis assessed by BrdU incorporation, as well as EGF-stimulated EGF receptor activation, decreased in the STIM1 KD clones. Xenograft growth of the STIM1 KD clones was significantly retarded compared with that of the negative control. Cell migration was attenuated in the STIM1 KD clone and the STIM1 silencing effect was reversed by transient re-expression of the full-length STIM1 but not CAD-deletion mutant. These results indicate that STIM1 plays an important role in SOCE, cell-growth and tumorigenicity in human epidermoid carcinoma A431cells, suggesting the potential use of STIM1-targeting agents for treating epidermoid carcinoma.
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Affiliation(s)
- Junko Yoshida
- Departments of Pharmacology, School of Medicine, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan.
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Timmons JA, Rao JN, Turner DJ, Zou T, Liu L, Xiao L, Wang PY, Wang JY. Induced expression of STIM1 sensitizes intestinal epithelial cells to apoptosis by modulating store-operated Ca2+ influx. J Gastrointest Surg 2012; 16:1397-405. [PMID: 22547346 PMCID: PMC3715032 DOI: 10.1007/s11605-012-1876-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2010] [Accepted: 03/20/2012] [Indexed: 01/31/2023]
Abstract
INTRODUCTION Apoptosis plays a critical role in the maintenance of gut mucosal epithelial homeostasis and is tightly regulated by numerous factors including intracellular Ca(2+). Canonical transient receptor potential channel-1 (TRPC1) is expressed in intestinal epithelial cells (IECs) and functions as a store-operated Ca(2+) channel. We have recently demonstrated that increased TRPC1 activity sensitizes IECs to apoptosis, but the upstream signaling initiating TRPC1 activation remains elusive. The novel protein, stromal interaction molecule 1 (STIM1), is shown to act as a store Ca(2+) sensor, and it can rapidly translocate to the plasma membrane where it directly interacts with TRPC1. The current study determined whether STIM1 plays an important role in the regulation of IEC apoptosis by activating TRPC1 channel activity. METHODS Studies were conducted in IEC-6 cells (derived from rat intestinal crypts) and stable TRPC1-transfected IECs (IEC-TRPC1). Apoptosis was induced by tumor necrosis factor-α (TNF-α)/cycloheximide (CHX), and intracellular free Ca(2+) concentration ([Ca(2+)](cyt)) was measured by fluorescence digital imaging analysis. Functions of STIM1 were investigated by specific siRNA (siSTIM1) and ectopic overexpression of the constitutively active STIM1 EF-hand mutants. RESULTS Stable STIM1-transfected IEC-6 cells (IEC-STIM1) showed increased STIM1 protein expression (~5 fold) and displayed a sustained increase in Ca(2+) influx after Ca(2+) store depletion (~2 fold). Susceptibility of IEC-STIM1 cells to TNF-α/CHX-induced apoptosis increased significantly as measured by changes in morphological features, DNA fragmentation, and caspase-3 activity. Apoptotic cells were increased from ~20% in parental IEC-6 cells to ~40% in stable IEC-STIM1 cells 4 h after exposure to TNF-α/CHX (p<0.05). In addition, stable IEC-TRPC1 cells also exhibited an increased sensitivity to TNF-α/CHX-induced apoptosis, which was prevented by STIM1 silencing through siSTIM1 transfection. STIM1 silencing by siSTIM1 also decreased Ca(2+) influx after store depletion in cells overexpressing TRPC1. Levels of Ca(2+) influx due to store depletion were decreased by ~70% in STIM1-silenced populations. Similarly, exposure of IEC-STIM1 cells to Ca(2+)-free medium also blocked increased sensitivity to apoptosis. CONCLUSIONS These results indicate that (1) STIM1 plays an important role in the regulation of IEC apoptosis by altering TRPC1 activity and (2) ectopic STIM1 expression sensitizes IECs to apoptosis through induction in TRPC1-mediated Ca(2+) influx.
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Affiliation(s)
- Jennifer A Timmons
- Cell Biology Group, Department of Surgery, School of Medicine, University of Maryland, Baltimore, MD 21201, USA.
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Abstract
Stromal interaction molecules (STIM1 and STIM2) are single pass transmembrane proteins located mainly in the endoplasmic reticulum (ER). STIM proteins contain an EF-hand in their N-termini that faces the lumen side of the ER allowing them to act as ER calcium (Ca(2+)) sensors. STIM1 has been recognized as central to the activation of the highly Ca(2+) selective store-operated Ca(2+) (SOC) entry current mediated by the Ca(2+) release-activated Ca(2+) (CRAC) channel; CRAC channels are formed by tetramers of the plasma membrane (PM) protein Orai1. Physiologically, the production of inositol 1,4,5-trisphosphate (IP(3)) upon stimulation of phospholipase C-coupled receptors and the subsequent emptying of IP(3)-sensitive ER Ca(2+) stores are sensed by STIM1 molecules which aggregate and move closer to the PM to interact physically with Orai1 channels and activate Ca(2+) entry. Orai1 has two homologous proteins encoded by separate genes, Orai2 and Orai3. Other modes of receptor-regulated Ca(2+) entry into cells are store-independent; for example, arachidonic acid activates a highly Ca(2+) selective store-independent channel formed by heteropentamers of Orai1 and Orai3 and regulated by the PM pool of STIM1. Here, I will discuss results pertaining to the roles of STIM and Orai proteins in smooth muscle Ca(2+) entry pathways and their role in vascular remodelling.
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Affiliation(s)
- Mohamed Trebak
- The Center for Cardiovascular Sciences, Albany Medical College, Albany, NY 12208, USA.
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Orai1 calcium channels in the vasculature. Pflugers Arch 2012; 463:635-47. [PMID: 22402985 PMCID: PMC3323825 DOI: 10.1007/s00424-012-1090-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Revised: 02/21/2012] [Accepted: 02/21/2012] [Indexed: 10/28/2022]
Abstract
Orai1 was discovered in T cells as a calcium-selective channel that is activated by store depletion. Recent studies suggest that it is expressed and functionally important also in blood vessels, not only because haematopoietic cells can incorporate in the vascular wall but also because Orai1 is expressed and functional in vascular smooth muscle cells and endothelial cells. This article summarises the arising observations in this new area of vascular research and debates underlying issues and challenges for future investigations. The primary focus is on vascular smooth muscle cells and endothelial cells. Specific topics include Orai1 expression; Orai1 roles in store-operated calcium entry and ionic currents of store-depleted cells; blockade of Orai1-related signals by Synta 66 and other pharmacology; activation or regulation of Orai1-related signals by physiological substances and compartments; stromal interaction molecules and the relationship of Orai1 to other ion channels, transporters and pumps; transient receptor potential canonical channels and their contribution to store-operated calcium entry; roles of Orai1 in vascular tone, remodelling, thrombus formation and inflammation; and Orai2 and Orai3. Overall, the observations suggest the existence of an additional, previously unrecognised, calcium channel of the vascular wall that is functionally important particularly in remodelling but probably also in certain vasoconstrictor contexts.
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Bogeski I, Al-Ansary D, Qu B, Niemeyer BA, Hoth M, Peinelt C. Pharmacology of ORAI channels as a tool to understand their physiological functions. Expert Rev Clin Pharmacol 2012; 3:291-303. [PMID: 22111611 DOI: 10.1586/ecp.10.23] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Store-operated Ca(2+) entry is a major Ca(2+) entry mechanism that is present in most cell types. In immune cells, store-operated Ca(2+) entry is almost exclusively mediated by Ca(2+) release-activated Ca(2+) (CRAC) channels. Ca(2+) entry through these channels and the corresponding cytosolic Ca(2+) signals are required for many immune cell functions, including all aspects of T-cell activation. ORAI proteins are the molecular correlates for the CRAC channels. The three human members, ORAI1, ORAI2 and ORAI3, are activated through the stromal interaction molecules (STIM)1 and 2 following depletion of endoplasmic reticulum Ca(2+) stores. Different combinations of STIM and ORAI can form different CRAC channels with distinct biophysical properties. In this article, we review and discuss mechanistic and functional implications of two important CRAC/ORAI inhibitors, 2-APB and BTP2, and the antibiotic G418 that has also been reported to interfere with ORAI channel function. The use of pharmacological tools should help to assign distinct physiological and pathophysiological functions to different STIM-ORAI protein complexes.
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Affiliation(s)
- Ivan Bogeski
- Department of Biophysics, Saarland University, Homburg, Germany
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50
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Putney JW, Tomita T. Phospholipase C signaling and calcium influx. Adv Biol Regul 2012; 52:152-64. [PMID: 21933679 PMCID: PMC3560308 DOI: 10.1016/j.advenzreg.2011.09.005] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Accepted: 09/06/2011] [Indexed: 04/18/2023]
Affiliation(s)
- James W Putney
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences - NIH, Department of Health and Human Services, Research Triangle Park, NC 27709, USA.
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