1
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Hai E, Li B, Zhang J, Zhang J. Sperm freezing damage: the role of regulated cell death. Cell Death Discov 2024; 10:239. [PMID: 38762505 PMCID: PMC11102515 DOI: 10.1038/s41420-024-02013-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 05/04/2024] [Accepted: 05/07/2024] [Indexed: 05/20/2024] Open
Abstract
Substantial progress in research on sperm cryopreservation has occurred since the twentieth century, especially focusing on improving sperm freezing procedures and optimizing semen extenders. However, the cellular biological mechanisms of sperm freezing damage are still unclear, which greatly restricts the promotion and development of sperm cryopreservation. An essential component of sperm freezing damage is the occurrence of cell death. Considering the existence of multiple types of cell death pathways, this review discusses connections between characteristics of regulated cell death (e.g., apoptosis and ferroptosis), and accidental cell death (e.g., intracellular ice crystals) with sperm freezing damage and explores possible future research directions in this field.
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Affiliation(s)
- Erhan Hai
- Inner Mongolia Key Laboratory of Sheep & Goat Genetics Breeding and Reproduction, College of Animal Science, Inner Mongolia Agricultural University, Hohhot, 010018, Inner Mongolia, China
| | - Boyuan Li
- Inner Mongolia Key Laboratory of Sheep & Goat Genetics Breeding and Reproduction, College of Animal Science, Inner Mongolia Agricultural University, Hohhot, 010018, Inner Mongolia, China
| | - Jian Zhang
- Inner Mongolia Key Laboratory of Sheep & Goat Genetics Breeding and Reproduction, College of Animal Science, Inner Mongolia Agricultural University, Hohhot, 010018, Inner Mongolia, China
| | - Jiaxin Zhang
- Inner Mongolia Key Laboratory of Sheep & Goat Genetics Breeding and Reproduction, College of Animal Science, Inner Mongolia Agricultural University, Hohhot, 010018, Inner Mongolia, China.
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2
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Rumpa MM, Maier C. TRPV1-Dependent Antiproliferative Activity of Dioecious Maclura pomifera Extracts in Estrogen Receptor-Positive Breast Cancer Cell Lines Involves Multiple Apoptotic Pathways. Int J Mol Sci 2024; 25:5258. [PMID: 38791297 PMCID: PMC11120667 DOI: 10.3390/ijms25105258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 05/06/2024] [Accepted: 05/09/2024] [Indexed: 05/26/2024] Open
Abstract
Globally, breast cancer is a significant cause of mortality. Recent research focused on identifying compounds regulating the transient receptor potential vanilloid 1 (TRPV1) ion channel activity for the possibility of developing cancer therapeutics. In this study, the antiproliferative properties and mechanisms of action through TRPV1 of Maclura pomifera, a dioecious tree native to the south-central USA, have been investigated. Male and female extracts of spring branch tissues and leaves (500 µg/mL) significantly reduced the viability of MCF-7 and T47D cells by 75-80%. M. pomifera extracts induced apoptosis by triggering intracellular calcium overload via TRPV1. Blocking TRPV1 with the capsazepine antagonist and pretreating cells with the BAPTA-AM chelator boosted cell viability, revealing that M. pomifera phytochemicals activate TRPV1. Both male and female M. pomifera extracts initiated apoptosis through multiple pathways, the mitochondrial, ERK-induced, and endoplasmic reticulum-stress-mediated apoptotic pathways, demonstrated by the expression of activated caspase 3, caspase 9, caspase 8, FADD, FAS, ATF4, and CHOP, the overexpression of phosphorylated PERK and ERK proteins, and the reduction of BCL-2 levels. In addition, AKT and pAKT protein expressions were reduced in female M. pomifera-treated cells, revealing that female plant extract also inhibits PI3K/Akt signaling pathways. These results suggest that phytochemicals in M. pomifera extracts could be promising for developing breast cancer therapeutics.
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Affiliation(s)
| | - Camelia Maier
- Division of Biology, School of the Sciences, Texas Woman’s University, Denton, TX 76204, USA;
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3
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Guerrache A, Micheau O. TNF-Related Apoptosis-Inducing Ligand: Non-Apoptotic Signalling. Cells 2024; 13:521. [PMID: 38534365 DOI: 10.3390/cells13060521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/01/2024] [Accepted: 03/14/2024] [Indexed: 03/28/2024] Open
Abstract
TNF-related apoptosis-inducing ligand (TRAIL or Apo2 or TNFSF10) belongs to the TNF superfamily. When bound to its agonistic receptors, TRAIL can induce apoptosis in tumour cells, while sparing healthy cells. Over the last three decades, this tumour selectivity has prompted many studies aiming at evaluating the anti-tumoral potential of TRAIL or its derivatives. Although most of these attempts have failed, so far, novel formulations are still being evaluated. However, emerging evidence indicates that TRAIL can also trigger a non-canonical signal transduction pathway that is likely to be detrimental for its use in oncology. Likewise, an increasing number of studies suggest that in some circumstances TRAIL can induce, via Death receptor 5 (DR5), tumour cell motility, potentially leading to and contributing to tumour metastasis. While the pro-apoptotic signal transduction machinery of TRAIL is well known from a mechanistic point of view, that of the non-canonical pathway is less understood. In this study, we the current state of knowledge of TRAIL non-canonical signalling.
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Affiliation(s)
- Abderrahmane Guerrache
- Université de Bourgogne, 21000 Dijon, France
- INSERM Research Center U1231, «Equipe DesCarTes», 21000 Dijon, France
| | - Olivier Micheau
- Université de Bourgogne, 21000 Dijon, France
- INSERM Research Center U1231, «Equipe DesCarTes», 21000 Dijon, France
- Laboratoire d'Excellence LipSTIC, 21000 Dijon, France
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4
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Kodakandla G, Akimzhanov AM, Boehning D. Regulatory mechanisms controlling store-operated calcium entry. Front Physiol 2023; 14:1330259. [PMID: 38169682 PMCID: PMC10758431 DOI: 10.3389/fphys.2023.1330259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 12/08/2023] [Indexed: 01/05/2024] Open
Abstract
Calcium influx through plasma membrane ion channels is crucial for many events in cellular physiology. Cell surface stimuli lead to the production of inositol 1,4,5-trisphosphate (IP3), which binds to IP3 receptors (IP3R) in the endoplasmic reticulum (ER) to release calcium pools from the ER lumen. This leads to the depletion of ER calcium pools, which has been termed store depletion. Store depletion leads to the dissociation of calcium ions from the EF-hand motif of the ER calcium sensor Stromal Interaction Molecule 1 (STIM1). This leads to a conformational change in STIM1, which helps it to interact with the plasma membrane (PM) at ER:PM junctions. At these ER:PM junctions, STIM1 binds to and activates a calcium channel known as Orai1 to form calcium release-activated calcium (CRAC) channels. Activation of Orai1 leads to calcium influx, known as store-operated calcium entry (SOCE). In addition to Orai1 and STIM1, the homologs of Orai1 and STIM1, such as Orai2/3 and STIM2, also play a crucial role in calcium homeostasis. The influx of calcium through the Orai channel activates a calcium current that has been termed the CRAC current. CRAC channels form multimers and cluster together in large macromolecular assemblies termed "puncta". How CRAC channels form puncta has been contentious since their discovery. In this review, we will outline the history of SOCE, the molecular players involved in this process, as well as the models that have been proposed to explain this critical mechanism in cellular physiology.
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Affiliation(s)
- Goutham Kodakandla
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, NJ, United States
| | - Askar M. Akimzhanov
- Department of Biochemistry and Molecular Biology, McGovern Medical School, Houston, TX, United States
| | - Darren Boehning
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, NJ, United States
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5
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Kodakandla G, Akimzhanov AM, Boehning D. Regulatory mechanisms controlling store-operated calcium entry. ARXIV 2023:arXiv:2309.06907v3. [PMID: 37744466 PMCID: PMC10516112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Calcium influx through plasma membrane ion channels is crucial for many events in cellular physiology. Cell surface stimuli lead to the production of inositol 1,4,5-trisphosphate (IP3), which binds to IP3 receptors (IP3R) in the endoplasmic reticulum (ER) to release calcium pools from the ER lumen. This leads to the depletion of ER calcium pools, which has been termed store depletion. Store depletion leads to the dissociation of calcium ions from the EF-hand motif of the ER calcium sensor Stromal Interaction Molecule 1 (STIM1). This leads to a conformational change in STIM1, which helps it to interact with the plasma membrane (PM) at ER:PM junctions. At these ER:PM junctions, STIM1 binds to and activates a calcium channel known as Orai1 to form calcium-release activated calcium (CRAC) channels. Activation of Orai1 leads to calcium influx, known as store-operated calcium entry (SOCE). In addition to Orai1 and STIM1, the homologs of Orai1 and STIM1, such as Orai2/3 and STIM2, also play a crucial role in calcium homeostasis. The influx of calcium through the Orai channel activates a calcium current that has been termed the CRAC current. CRAC channels form multimers and cluster together in large macromolecular assemblies termed "puncta". How CRAC channels form puncta has been contentious since their discovery. In this review, we will outline the history of SOCE, the molecular players involved in this process, as well as the models that have been proposed to explain this critical mechanism in cellular physiology.
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Affiliation(s)
- Goutham Kodakandla
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, NJ, USA, 08103
| | - Askar M. Akimzhanov
- Department of Biochemistry and Molecular Biology, McGovern Medical School, Houston, Texas, USA, 77030
| | - Darren Boehning
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, NJ, USA, 08103
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6
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Dhaouadi N, Vitto VAM, Pinton P, Galluzzi L, Marchi S. Ca 2+ signaling and cell death. Cell Calcium 2023; 113:102759. [PMID: 37210868 DOI: 10.1016/j.ceca.2023.102759] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/12/2023] [Accepted: 05/13/2023] [Indexed: 05/23/2023]
Abstract
Multiple forms of regulated cell death (RCD) have been characterized, each of which originates from the activation of a dedicated molecular machinery. RCD can occur in purely physiological settings or upon failing cellular adaptation to stress. Ca2+ions have been shown to physically interact with - and hence regulate - various components of the RCD machinery. Moreover, intracellular Ca2+ accumulation can promote organellar dysfunction to degree that can be overtly cytotoxic or sensitize cells to RCD elicited by other stressors. Here, we provide an overview of the main links between Ca2+and different forms of RCD, including apoptosis, mitochondrial permeability transition (MPT)-driven necrosis, necroptosis, ferroptosis, lysosome-dependent cell death, and parthanatos.
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Affiliation(s)
- Nada Dhaouadi
- Department of Clinical and Molecular Sciences, Marche Polytechnic University, Ancona, Italy
| | | | - Paolo Pinton
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy; GVM Care & Research, Maria Cecilia Hospital, Cotignola, Italy
| | - Lorenzo Galluzzi
- Department of Radiation Oncology, Weill Cornell Medical College, New York, NY, USA; Sandra and Edward Meyer Cancer Center, New York, NY, USA; Caryl and Israel Englander Institute for Precision Medicine, New York, NY, USA.
| | - Saverio Marchi
- Department of Clinical and Molecular Sciences, Marche Polytechnic University, Ancona, Italy.
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7
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Calcium-dependent cAMP mediates the mechanoresponsive behaviour of endothelial cells to high-frequency nanomechanostimulation. Biomaterials 2023; 292:121866. [PMID: 36526351 DOI: 10.1016/j.biomaterials.2022.121866] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 09/10/2022] [Accepted: 10/18/2022] [Indexed: 12/15/2022]
Abstract
The endothelial junction plays a central role in regulating intravascular and interstitial tissue permeability. The ability to manipulate its integrity therefore not only facilitates an improved understanding of its underlying molecular mechanisms but also provides insight into potential therapeutic solutions. Herein, we explore the effects of short-duration nanometer-amplitude MHz-order mechanostimulation on interendothelial junction stability and hence the barrier capacity of endothelial monolayers. Following an initial transient in which the endothelial barrier is permeabilised due to Rho-ROCK-activated actin stress fibre formation and junction disruption typical of a cell's response to insults, we observe, quite uniquely, the integrity of the endothelial barrier to not only spontaneously recover but also to be enhanced considerably-without the need for additional stimuli or intervention. Central to this peculiar biphasic response, which has not been observed with other stimuli to date, is the role of second messenger calcium and cyclic adenosine monophosphate (cAMP) signalling. We show that intracellular Ca2+, modulated by the high frequency excitation, is responsible for activating reorganisation of the actin cytoskeleton in the barrier recovery phase, in which circumferential actin bundles are formed to stabilise the adherens junctions via a cAMP-mediated Epac1-Rap1 pathway. Despite the short-duration stimulation (8 min), the approximate 4-fold enhancement in the transendothelial electrical resistance (TEER) of endothelial cells from different tissue sources, and the corresponding reduction in paracellular permeability, was found to persist over hours. The effect can further be extended through multiple treatments without resulting in hyperpermeabilisation of the barrier, as found with prolonged use of chemical stimuli, through which only 1.1- to 1.2-fold improvement in TEER has been reported. Such an ability to regulate and enhance endothelial barrier capacity is particularly useful in the development of in vitro barrier models that more closely resemble their in vivo counterparts.
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8
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Zhang X, Lee MD, Buckley C, Wilson C, McCarron JG. Mitochondria regulate TRPV4-mediated release of ATP. Br J Pharmacol 2022; 179:1017-1032. [PMID: 34605007 DOI: 10.1111/bph.15687] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 08/10/2021] [Accepted: 09/02/2021] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Ca2+ influx via TRPV4 channels triggers Ca2+ release from the IP3 -sensitive internal store to generate repetitive oscillations. Although mitochondria are acknowledged regulators of IP3 -mediated Ca2+ release, how TRPV4-mediated Ca2+ signals are regulated by mitochondria is unknown. We show that depolarised mitochondria switch TRPV4 signalling from relying on Ca2+ -induced Ca2+ release at IP3 receptors to being independent of Ca2+ influx and instead mediated by ATP release via pannexins. EXPERIMENTAL APPROACH TRPV4-evoked Ca2+ signals were individually examined in hundreds of cells in the endothelium of rat mesenteric resistance arteries using the indicator Cal520. KEY RESULTS TRPV4 activation with GSK1016790A (GSK) generated repetitive Ca2+ oscillations that required Ca2+ influx. However, when the mitochondrial membrane potential was depolarised, by the uncoupler CCCP or complex I inhibitor rotenone, TRPV4 activation generated large propagating, multicellular, Ca2+ waves in the absence of external Ca2+ . The ATP synthase inhibitor oligomycin did not potentiate TRPV4-mediated Ca2+ signals. GSK-evoked Ca2+ waves, when mitochondria were depolarised, were blocked by the TRPV4 channel blocker HC067047, the SERCA inhibitor cyclopiazonic acid, the PLC blocker U73122 and the inositol trisphosphate receptor blocker caffeine. The Ca2+ waves were also inhibited by the extracellular ATP blockers suramin and apyrase and the pannexin blocker probenecid. CONCLUSION AND IMPLICATIONS These results highlight a previously unknown role of mitochondria in shaping TRPV4-mediated Ca2+ signalling by facilitating ATP release. When mitochondria are depolarised, TRPV4-mediated release of ATP via pannexin channels activates plasma membrane purinergic receptors to trigger IP3 -evoked Ca2+ release.
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Affiliation(s)
- Xun Zhang
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - Matthew D Lee
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - Charlotte Buckley
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - Calum Wilson
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - John G McCarron
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
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9
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Wang D, He X, Zheng C, Wang C, Peng P, Gao C, Xu X, Ma Y, Liu M, Yang L, Luo Z. Endoplasmic Reticulum Stress: An Emerging Therapeutic Target for Intervertebral Disc Degeneration. Front Cell Dev Biol 2022; 9:819139. [PMID: 35178406 PMCID: PMC8843852 DOI: 10.3389/fcell.2021.819139] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 12/24/2021] [Indexed: 12/22/2022] Open
Abstract
Low back pain (LBP) is a global health issue. Intervertebral disc degeneration (IDD) is a major cause of LBP. Although the explicit mechanisms underpinning IDD are unclear, endoplasmic reticulum (ER) stress caused by aberrant unfolded or misfolded proteins may be involved. The accumulation of unfolded/misfolded proteins may result in reduced protein synthesis and promote aberrant protein degradation to recover ER function, a response termed the unfolded protein response. A growing body of literature has demonstrated the potential relationships between ER stress and the pathogenesis of IDD, indicating some promising therapeutic targets. In this review, we summarize the current knowledge regarding the impact of ER stress on the process of IDD, as well as some potential therapeutic strategies for alleviating disc degeneration by targeting different pathways to inhibit ER stress. This review will facilitate understanding the pathogenesis and progress of IDD and highlights potential therapeutic targets for treating this condition.
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Affiliation(s)
- Dong Wang
- Institute of Orthopedic Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Xin He
- Pharmacy Department, Air Force Hospital of Eastern Theater Command, Nanjing, China
| | - Chao Zheng
- Institute of Orthopedic Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Chengzhe Wang
- Rehabilitation Department, Dongchangfu Traditional Chinese Medicine Hospital, Liaocheng, China
| | - Pandi Peng
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, China
| | - Chu Gao
- Medical Research Institute, Northwestern Polytechnical University, Xi'an, China
| | - Xiaolong Xu
- Institute of Orthopedic Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Yachao Ma
- Institute of Orthopedic Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Mei Liu
- Pharmacy Department, Air Force Hospital of Eastern Theater Command, Nanjing, China
| | - Liu Yang
- Institute of Orthopedic Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China.,Medical Research Institute, Northwestern Polytechnical University, Xi'an, China
| | - Zhuojing Luo
- Institute of Orthopedic Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China.,Medical Research Institute, Northwestern Polytechnical University, Xi'an, China
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10
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Rodríguez LR, Lapeña-Luzón T, Benetó N, Beltran-Beltran V, Pallardó FV, Gonzalez-Cabo P, Navarro JA. Therapeutic Strategies Targeting Mitochondrial Calcium Signaling: A New Hope for Neurological Diseases? Antioxidants (Basel) 2022; 11:antiox11010165. [PMID: 35052668 PMCID: PMC8773297 DOI: 10.3390/antiox11010165] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 12/13/2022] Open
Abstract
Calcium (Ca2+) is a versatile secondary messenger involved in the regulation of a plethora of different signaling pathways for cell maintenance. Specifically, intracellular Ca2+ homeostasis is mainly regulated by the endoplasmic reticulum and the mitochondria, whose Ca2+ exchange is mediated by appositions, termed endoplasmic reticulum-mitochondria-associated membranes (MAMs), formed by proteins resident in both compartments. These tethers are essential to manage the mitochondrial Ca2+ influx that regulates the mitochondrial function of bioenergetics, mitochondrial dynamics, cell death, and oxidative stress. However, alterations of these pathways lead to the development of multiple human diseases, including neurological disorders, such as amyotrophic lateral sclerosis, Friedreich's ataxia, and Charcot-Marie-Tooth. A common hallmark in these disorders is mitochondrial dysfunction, associated with abnormal mitochondrial Ca2+ handling that contributes to neurodegeneration. In this work, we highlight the importance of Ca2+ signaling in mitochondria and how the mechanism of communication in MAMs is pivotal for mitochondrial maintenance and cell homeostasis. Lately, we outstand potential targets located in MAMs by addressing different therapeutic strategies focused on restoring mitochondrial Ca2+ uptake as an emergent approach for neurological diseases.
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Affiliation(s)
- Laura R. Rodríguez
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
- Associated Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), 46010 Valencia, Spain
- Correspondence: (L.R.R.); (P.G.-C.); (J.A.N.)
| | - Tamara Lapeña-Luzón
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
- Associated Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), 46010 Valencia, Spain
| | - Noelia Benetó
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
- Associated Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), 46010 Valencia, Spain
| | - Vicent Beltran-Beltran
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
| | - Federico V. Pallardó
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
- Associated Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), 46010 Valencia, Spain
| | - Pilar Gonzalez-Cabo
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València-INCLIVA, 46010 Valencia, Spain; (T.L.-L.); (N.B.); (V.B.-B.); (F.V.P.)
- Associated Unit for Rare Diseases INCLIVA-CIPF, 46010 Valencia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), 46010 Valencia, Spain
- Correspondence: (L.R.R.); (P.G.-C.); (J.A.N.)
| | - Juan Antonio Navarro
- Department of Genetics, Universitat de València-INCLIVA, 46100 Valencia, Spain
- INCLIVA Biomedical Research Institute, 46010 Valencia, Spain
- Correspondence: (L.R.R.); (P.G.-C.); (J.A.N.)
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11
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Liu Y, Hu R, Shen H, Mo Q, Wang X, Zhang G, Li S, Liang G, Hou N, Luo J. Endophilin A2-mediated alleviation of endoplasmic reticulum stress-induced cardiac injury involves the suppression of ERO1α/IP 3R signaling pathway. Int J Biol Sci 2021; 17:3672-3688. [PMID: 34512174 PMCID: PMC8416715 DOI: 10.7150/ijbs.60110] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 08/11/2021] [Indexed: 01/14/2023] Open
Abstract
Cardiac injury upon myocardial infarction (MI) is the leading cause of heart failure. The present study aims to investigate the role of EndoA2 in ischemia-induced cardiomyocyte apoptosis and cardiac injury. In vivo, we established an MI mouse model by ligating the left anterior descending (LAD) coronary artery, and intramyocardial injection of adenoviral EndoA2 (Ad-EndoA2) was used to overexpress EndoA2. In vitro, we used the siRNA and Ad-EndoA2 transfection strategies. Here, we reported that EndoA2 expression was remarkably elevated in the infarct border zone of MI mouse hearts and neonatal rat cardiomyocytes (NRCMs) stimulated with oxygen and glucose deprivation (OGD) which mimicked ischemia. We showed that intramyocardial injection of Ad-EndoA2 attenuated cardiomyocyte apoptosis and reduced endoplasmic reticulum (ER) stress in response to MI injury. Using siRNA for knockdown and Ad-EndoA2 for overexpression, we validated that knockdown of EndoA2 in NRCMs exacerbated OGD-induced NRCM apoptosis, whereas overexpression of EndoA2 attenuates OGD-induced cardiomyocyte apoptosis. Mechanistically, knockdown of EndoA2 activated ER stress response, which increases ER oxidoreductase 1α (ERO1α) and inositol 1, 4, 5-trisphosphate receptor (IP3R) activity, thus led to increased intracellular Ca2+ accumulation, followed by elevated calcineurin activity and nuclear factor of activated T-cells (NFAT) dephosphorylation. Pretreatment with the IP3R inhibitor 2-Aminoethoxydiphenylborate (2-APB) attenuated intracellular Ca2+ accumulation, and pretreatment with the Ca2+ chelator 1,2-bis(o-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid (BAPTA) or the calcineurin inhibitor Cyclosporin A (CsA) inhibited EndoA2-knockdown-induced NRCM apoptosis. Overexpression of EndoA2 led to the opposite effects by suppressing ER-stress-mediated ERO1α/IP3R signaling pathway. This study demonstrated that EndoA2 protected cardiac function in response to MI via attenuating ER-stress-mediated ERO1α/IP3R signaling pathway. Targeting EndoA2 is a potential therapeutic strategy for the prevention of postinfarction-induced cardiac injury and heart failure.
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Affiliation(s)
- Yun Liu
- The Fifth Affiliated Hospital, Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, P.R. China
| | - Ruixiang Hu
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Jinan University, Guangzhou 510630, P.R. China
| | - Huanjia Shen
- The Fifth Affiliated Hospital, Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, P.R. China
| | - Qinxin Mo
- The Fifth Affiliated Hospital, Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, P.R. China
| | - Xinqiuyue Wang
- The Fifth Affiliated Hospital, Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, P.R. China
| | - Guiping Zhang
- The Fifth Affiliated Hospital, Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, P.R. China
| | - Sujuan Li
- The Fifth Affiliated Hospital, Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, P.R. China
| | - Guanfeng Liang
- The Fifth Affiliated Hospital, Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, P.R. China
| | - Ning Hou
- The Fifth Affiliated Hospital, Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, P.R. China
| | - Jiandong Luo
- Guangzhou Institute of Cardiovascular Disease, Guangzhou Key Laboratory of Cardiovascular Disease, and the Second Affiliated Hospital, Guangzhou Medical University, Guangzhou 510260, P.R. China
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12
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Pharmic Activation of PKG2 Alleviates Diabetes-Induced Osteoblast Dysfunction by Suppressing PLC β1-Ca 2+-Mediated Endoplasmic Reticulum Stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:5552530. [PMID: 34221234 PMCID: PMC8225424 DOI: 10.1155/2021/5552530] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 04/08/2021] [Accepted: 05/17/2021] [Indexed: 01/06/2023]
Abstract
As reported in our previous study, cinaciguat can improve implant osseointegration in type 2 diabetes mellitus (T2DM) rats by reactivating type 2 cGMP-dependent protein kinase (PKG2), but the downstream mechanisms remain unclear. In the present study, we investigated the favorable effect of cinaciguat on primary rat osteoblast, which was cultivated on titanium disc under vitro T2DM conditions (25 mM glucose and 200 μM palmitate), and clarified the therapeutic mechanism by proteomic analysis. The results demonstrated that T2DM medium caused significant downregulation of PKG2 and induced obvious osteoblast dysfunction. And overexpression of PKG2 by lentivirus and cinaciguat could promote cell proliferation, adhesion, and differentiation, leading to decreased osteoblasts injury. Besides, proteomic analysis revealed the interaction between PKG2 and phospholipase Cβ1 (PLCβ1) in the cinaciguat addition group, and we further verified that upregulated PKG2 by cinaciguat could inhibit the activation of PLCβ1, then relieve intracellular calcium overload, and suppress endoplasmic reticulum (ER) stress to ameliorate osteoblast functions under T2DM condition. Collectively, these findings provided the first detailed mechanisms responsible for cinaciguat provided a favorable effect on promoting osseointegration in T2DM and demonstrated a new insight that diabetes mellitus-induced the aberrations in PKG2-PLCβ1-Ca2+-ER stress pathway was one underlying mechanism for poor osseointegration.
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13
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Bieerkehazhi S, Fan Y, West SJ, Tewari R, Ko J, Mills T, Boehning D, Akimzhanov AM. Ca2+-dependent protein acyltransferase DHHC21 controls activation of CD4+ T cells. J Cell Sci 2021; 135:268992. [PMID: 34080635 DOI: 10.1242/jcs.258186] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 04/13/2021] [Indexed: 11/20/2022] Open
Abstract
Despite the recognized significance of reversible protein lipidation (S-acylation) for T cell receptor signal transduction, the enzymatic control of this post-translational modification in T cells remains poorly understood. Here, we demonstrate that DHHC21 (also known as ZDHHC21), a member of the DHHC family of mammalian protein acyltransferases, mediates T cell receptor-induced S-acylation of proximal T cell signaling proteins. Using Zdhhc21dep mice, which express a functionally deficient version of DHHC21, we show that DHHC21 is a Ca2+/calmodulin-dependent enzyme critical for activation of naïve CD4+ T cells in response to T cell receptor stimulation. We find that disruption of the Ca2+/calmodulin-binding domain of DHHC21 does not affect thymic T cell development but prevents differentiation of peripheral CD4+ T cells into Th1, Th2 and Th17 effector T helper lineages. Our findings identify DHHC21 as an essential component of the T cell receptor signaling machinery and define a new role for protein acyltransferases in regulation of T cell-mediated immunity.
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Affiliation(s)
- Shayahati Bieerkehazhi
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Ying Fan
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX 77030, USA.,Cooper Medical School of Rowan University, Camden, NJ 08103, USA
| | - Savannah J West
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX 77030, USA.,MD Anderson Cancer Center and University of Texas Health Science at Houston Graduate School, Houston, TX 77030, USA
| | - Ritika Tewari
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Junsuk Ko
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX 77030, USA.,MD Anderson Cancer Center and University of Texas Health Science at Houston Graduate School, Houston, TX 77030, USA
| | - Tingting Mills
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Darren Boehning
- Cooper Medical School of Rowan University, Camden, NJ 08103, USA
| | - Askar M Akimzhanov
- Department of Biochemistry and Molecular Biology, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
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14
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Parys JB, Bultynck G, Vervliet T. IP 3 Receptor Biology and Endoplasmic Reticulum Calcium Dynamics in Cancer. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2021; 59:215-237. [PMID: 34050869 DOI: 10.1007/978-3-030-67696-4_11] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Intracellular Ca2+ signaling regulates a plethora of cellular functions. A central role in these processes is reserved for the inositol 1,4,5-trisphosphate receptor (IP3R), a ubiquitously expressed Ca2+-release channel, mainly located in the endoplasmic reticulum (ER). Three IP3R isoforms (IP3R1, IP3R2 and IP3R3) exist, encoded respectively by ITPR1, ITPR2 and ITPR3. The proteins encoded by these genes are each about 2700 amino acids long and assemble into large tetrameric channels, which form the target of many regulatory proteins, including several tumor suppressors and oncogenes. Due to the important role of the IP3Rs in cell function, their dysregulation is linked to multiple pathologies. In this review, we highlight the complex role of the IP3R in cancer, as it participates in most of the so-called "hallmarks of cancer". In particular, the IP3R directly controls cell death and cell survival decisions via regulation of autophagy and apoptosis. Moreover, the IP3R impacts cellular proliferation, migration and invasion. Typical examples of the role of the IP3Rs in these various processes are discussed. The relative levels of the IP3R isoforms expressed and their subcellular localization, e.g. at the ER-mitochondrial interface, is hereby important. Finally, evidence is provided about how the knowledge of the regulation of the IP3R by tumor suppressors and oncogenes can be exploited to develop novel therapeutic approaches to fight cancer.
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Affiliation(s)
- Jan B Parys
- Laboratory for Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine & Leuven Cancer Institute, KU Leuven, Leuven, Belgium.
| | - Geert Bultynck
- Laboratory for Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine & Leuven Cancer Institute, KU Leuven, Leuven, Belgium
| | - Tim Vervliet
- Laboratory for Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine & Leuven Cancer Institute, KU Leuven, Leuven, Belgium
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15
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Fan Y, Shayahati B, Tewari R, Boehning D, Akimzhanov AM. Regulation of T cell receptor signaling by protein acyltransferase DHHC21. Mol Biol Rep 2020; 47:6471-6478. [PMID: 32789573 DOI: 10.1007/s11033-020-05691-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 07/26/2020] [Indexed: 12/11/2022]
Abstract
S-acylation reversible-post-translational lipidation of cysteine residues-is emerging as an important regulatory mechanism in T cell signaling. Dynamic S-acylation is critical for protein recruitment into the T cell receptor complex and initiation of the subsequent signaling cascade. However, the enzymatic control of protein S-acylation in T cells remains poorly understood. Here, we report a previously uncharacterized role of DHHC21, a member of the mammalian family of DHHC protein acyltransferases, in regulation of the T cell receptor pathway. We found that loss of DHHC21 prevented S-acylation of key T cell signaling proteins, resulting in disruption of the early signaling events and suppressed expression of T cell activation markers. Furthermore, downregulation of DHHC21 prevented activation and differentiation of naïve T cells into effector subtypes. Together, our study provides the first direct evidence that DHHC protein acyltransferases can play an essential role in regulation of T cell-mediated immunity.
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Affiliation(s)
- Ying Fan
- Department of Biochemistry and Molecular Biology, University of Texas-McGovern Medical School, 6431 Fannin Street, Suite 6.200, Houston, TX, 77030, USA
- Cooper Medical School of Rowan University, 401 Broadway, Camden, NJ, 08103, USA
| | - Bieerkehazhi Shayahati
- Department of Biochemistry and Molecular Biology, University of Texas-McGovern Medical School, 6431 Fannin Street, Suite 6.200, Houston, TX, 77030, USA
| | - Ritika Tewari
- Department of Biochemistry and Molecular Biology, University of Texas-McGovern Medical School, 6431 Fannin Street, Suite 6.200, Houston, TX, 77030, USA
| | - Darren Boehning
- Cooper Medical School of Rowan University, 401 Broadway, Camden, NJ, 08103, USA
| | - Askar M Akimzhanov
- Department of Biochemistry and Molecular Biology, University of Texas-McGovern Medical School, 6431 Fannin Street, Suite 6.200, Houston, TX, 77030, USA.
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16
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Volpin V, Michels T, Sorrentino A, Menevse AN, Knoll G, Ditz M, Milenkovic VM, Chen CY, Rathinasamy A, Griewank K, Boutros M, Haferkamp S, Berneburg M, Wetzel CH, Seckinger A, Hose D, Goldschmidt H, Ehrenschwender M, Witzens-Harig M, Szoor A, Vereb G, Khandelwal N, Beckhove P. CAMK1D Triggers Immune Resistance of Human Tumor Cells Refractory to Anti-PD-L1 Treatment. Cancer Immunol Res 2020; 8:1163-1179. [PMID: 32665263 DOI: 10.1158/2326-6066.cir-19-0608] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 03/16/2020] [Accepted: 07/09/2020] [Indexed: 11/16/2022]
Abstract
The success of cancer immunotherapy is limited by resistance to immune checkpoint blockade. We therefore conducted a genetic screen to identify genes that mediated resistance against CTLs in anti-PD-L1 treatment-refractory human tumors. Using PD-L1-positive multiple myeloma cells cocultured with tumor-reactive bone marrow-infiltrating CTL as a model, we identified calcium/calmodulin-dependent protein kinase 1D (CAMK1D) as a key modulator of tumor-intrinsic immune resistance. CAMK1D was coexpressed with PD-L1 in anti-PD-L1/PD-1 treatment-refractory cancer types and correlated with poor prognosis in these tumors. CAMK1D was activated by CTL through Fas-receptor stimulation, which led to CAMK1D binding to and phosphorylating caspase-3, -6, and -7, inhibiting their activation and function. Consistently, CAMK1D mediated immune resistance of murine colorectal cancer cells in vivo The pharmacologic inhibition of CAMK1D, on the other hand, restored the sensitivity toward Fas-ligand treatment in multiple myeloma and uveal melanoma cells in vitro Thus, rapid inhibition of the terminal apoptotic cascade by CAMK1D expressed in anti-PD-L1-refractory tumors via T-cell recognition may have contributed to tumor immune resistance.
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Affiliation(s)
- Valentina Volpin
- Regensburg Center for Interventional Immunology (RCI), University Regensburg, Regensburg, Germany.,German Cancer Research Center (DKFZ), Translational Immunology, Heidelberg, Germany
| | - Tillmann Michels
- Regensburg Center for Interventional Immunology (RCI), University Regensburg, Regensburg, Germany.,German Cancer Research Center (DKFZ), Translational Immunology, Heidelberg, Germany.,iOmx Therapeutics AG, Martinsried/Munich, Germany
| | - Antonio Sorrentino
- Regensburg Center for Interventional Immunology (RCI), University Regensburg, Regensburg, Germany.,German Cancer Research Center (DKFZ), Translational Immunology, Heidelberg, Germany
| | - Ayse N Menevse
- Regensburg Center for Interventional Immunology (RCI), University Regensburg, Regensburg, Germany
| | - Gertrud Knoll
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Madlen Ditz
- Regensburg Center for Interventional Immunology (RCI), University Regensburg, Regensburg, Germany
| | - Vladimir M Milenkovic
- Department of Psychiatry and Psychotherapy, Molecular Neurosciences, University of Regensburg, Regensburg, Germany
| | - Chih-Yeh Chen
- Regensburg Center for Interventional Immunology (RCI), University Regensburg, Regensburg, Germany
| | - Anchana Rathinasamy
- Regensburg Center for Interventional Immunology (RCI), University Regensburg, Regensburg, Germany
| | - Klaus Griewank
- Department of Dermatology, University Hospital Essen, West German Cancer Center, University Duisburg-Essen and the German Cancer Consortium, Essen, Germany
| | - Michael Boutros
- German Cancer Research Center (DKFZ), Division Signalling and Functional Genomics, Heidelberg, Germany
| | - Sebastian Haferkamp
- Department of Dermatology, University Hospital Regensburg, Regensburg, Germany
| | - Mark Berneburg
- Department of Dermatology, University Hospital Regensburg, Regensburg, Germany
| | - Christian H Wetzel
- Department of Psychiatry and Psychotherapy, Molecular Neurosciences, University of Regensburg, Regensburg, Germany
| | - Anja Seckinger
- Labor für Myelomforschung, Medizinische Klinik V, Universitätsklinikum Heidelberg, Heidelberg, Germany
| | - Dirk Hose
- Department of Hematology and Immunology, Myeloma Center Brussels, Jette, Belgium
| | - Hartmut Goldschmidt
- Department of Internal Medicine V and National Center of Tumor Diseases (NCT), University Hospital Heidelberg, Heidelberg, Germany
| | - Martin Ehrenschwender
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Mathias Witzens-Harig
- Department of Hematology, Oncology and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany
| | - Arpad Szoor
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Gyorgy Vereb
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | | | - Philipp Beckhove
- Regensburg Center for Interventional Immunology (RCI), University Regensburg, Regensburg, Germany. .,German Cancer Research Center (DKFZ), Translational Immunology, Heidelberg, Germany.,Department of Hematology, Oncology, Internal Medicine 3, University Hospital Regensburg, Regensburg, Germany
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17
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Guégan JP, Ginestier C, Charafe-Jauffret E, Ducret T, Quignard JF, Vacher P, Legembre P. CD95/Fas and metastatic disease: What does not kill you makes you stronger. Semin Cancer Biol 2019; 60:121-131. [PMID: 31176682 DOI: 10.1016/j.semcancer.2019.06.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/05/2019] [Accepted: 06/05/2019] [Indexed: 12/14/2022]
Abstract
CD95 (also known as Fas) is the prototype of death receptors; however, evidence suggests that this receptor mainly implements non-apoptotic signaling pathways such as NF-κB, MAPK, and PI3K that are involved in cell migration, differentiation, survival, and cytokine secretion. At least two different forms of CD95 L exist. The multi-aggregated transmembrane ligand (m-CD95 L) is cleaved by metalloproteases to release a homotrimeric soluble ligand (s-CD95 L). Unlike m-CD95 L, the interaction between s-CD95 L and its receptor CD95 fails to trigger apoptosis, but instead promotes calcium-dependent cell migration, which contributes to the accumulation of inflammatory Th17 cells in damaged organs of lupus patients and favors cancer cell invasiveness. Novel inhibitors targeting the pro-inflammatory roles of CD95/CD95 L may provide attractive therapeutic options for patients with chronic inflammatory disorders or cancer. This review discusses the roles of the CD95/CD95 L pair in cell migration and metastasis.
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Affiliation(s)
- Jean Philippe Guégan
- CLCC Eugène Marquis, Équipe Ligue Contre Le Cancer, Rennes, France; Université Rennes, INSERM U1242, Rennes, France
| | - Christophe Ginestier
- Aix-Marseille Univ, Inserm, CNRS, Institut Paoli-Calmettes, CRCM, Epithelial Stem Cells and Cancer Lab, Marseille, France
| | - Emmanuelle Charafe-Jauffret
- Aix-Marseille Univ, Inserm, CNRS, Institut Paoli-Calmettes, CRCM, Epithelial Stem Cells and Cancer Lab, Marseille, France
| | - Thomas Ducret
- Université de Bordeaux, Bordeaux, France; Centre de Recherche Cardio Thoracique de Bordeaux, INSERM U1045, Bordeaux, France
| | - Jean-François Quignard
- Université de Bordeaux, Bordeaux, France; Centre de Recherche Cardio Thoracique de Bordeaux, INSERM U1045, Bordeaux, France
| | - Pierre Vacher
- Université de Bordeaux, Bordeaux, France; INSERM U1218, Bordeaux, France
| | - Patrick Legembre
- CLCC Eugène Marquis, Équipe Ligue Contre Le Cancer, Rennes, France; Université Rennes, INSERM U1242, Rennes, France.
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18
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Bhuvanalakshmi G, Gamit N, Patil M, Arfuso F, Sethi G, Dharmarajan A, Kumar AP, Warrier S. Stemness, Pluripotentiality, and Wnt Antagonism: sFRP4, a Wnt antagonist Mediates Pluripotency and Stemness in Glioblastoma. Cancers (Basel) 2018; 11:E25. [PMID: 30591679 PMCID: PMC6356444 DOI: 10.3390/cancers11010025] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 12/17/2018] [Accepted: 12/21/2018] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Chemotherapeutic resistance of glioblastoma has been attributed to a self-renewing subpopulation, the glioma stem cells (GSCs), which is known to be maintained by the Wnt β-catenin pathway. Our previous findings demonstrated that exogeneous addition of the Wnt antagonist, secreted fizzled-related protein 4 (sFRP4) hampered stem cell properties in GSCs. METHODS To understand the molecular mechanism of sFRP4, we overexpressed sFRP4 (sFRP4 OE) in three human glioblastoma cell lines U87MG, U138MG, and U373MG. We also performed chromatin immunoprecipitation (ChIP) sequencing of sFRP4 OE and RNA sequencing of sFRP4 OE and sFRP4 knocked down U87 cells. RESULTS We observed nuclear localization of sFRP4, suggesting an unknown nuclear role. ChIP-sequencing of sFRP4 pulldown DNA revealed a homeobox Cphx1, related to the senescence regulator ETS proto-oncogene 2 (ETS2). Furthermore, miRNA885, a p53-mediated apoptosis inducer, was upregulated in sFRP4 OE cells. RNA sequencing analysis suggested that sFRP4-mediated apoptosis is via the Fas-p53 pathway by activating the Wnt calcium and reactive oxygen species pathways. Interestingly, sFRP4 OE cells had decreased stemness, but when knocked down in multipotent mesenchymal stem cells, pluripotentiality was induced and the Wnt β-catenin pathway was upregulated. CONCLUSIONS This study unveils a novel nuclear role for sFRP4 to promote apoptosis by a possible activation of DNA damage machinery in glioblastoma.
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Affiliation(s)
- Gurubharathi Bhuvanalakshmi
- Division of Cancer Stem Cells and Cardiovascular and Neuronal Regeneration, School of Regenerative Medicine, Manipal Academy of Higher Education (MAHE), Bangalore 560 065, India.
| | - Naisarg Gamit
- Division of Cancer Stem Cells and Cardiovascular and Neuronal Regeneration, School of Regenerative Medicine, Manipal Academy of Higher Education (MAHE), Bangalore 560 065, India.
| | - Manasi Patil
- Division of Cancer Stem Cells and Cardiovascular and Neuronal Regeneration, School of Regenerative Medicine, Manipal Academy of Higher Education (MAHE), Bangalore 560 065, India.
| | - Frank Arfuso
- Stem Cell and Cancer Biology Laboratory, School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia.
- School of Human Sciences, The University of Western Australia, Perth, WA 6009, Australia.
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore.
| | - Arun Dharmarajan
- Stem Cell and Cancer Biology Laboratory, School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia.
- School of Human Sciences, The University of Western Australia, Perth, WA 6009, Australia.
| | - Alan Prem Kumar
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore.
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore.
- Cancer Program, Medical Science Cluster, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228, Singapore.
- Curtin Medical School, Curtin University, Perth, WA 6102, Australia.
| | - Sudha Warrier
- Division of Cancer Stem Cells and Cardiovascular and Neuronal Regeneration, School of Regenerative Medicine, Manipal Academy of Higher Education (MAHE), Bangalore 560 065, India.
- Curtin Medical School, Curtin University, Perth, WA 6102, Australia.
- Cuor Stem Cellutions Pvt Ltd., School of Regenerative Medicine, Manipal Academy of Higher Education (MAHE), Bangalore 560 065, India.
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19
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Prevarskaya N, Skryma R, Shuba Y. Ion Channels in Cancer: Are Cancer Hallmarks Oncochannelopathies? Physiol Rev 2018; 98:559-621. [PMID: 29412049 DOI: 10.1152/physrev.00044.2016] [Citation(s) in RCA: 277] [Impact Index Per Article: 46.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Genomic instability is a primary cause and fundamental feature of human cancer. However, all cancer cell genotypes generally translate into several common pathophysiological features, often referred to as cancer hallmarks. Although nowadays the catalog of cancer hallmarks is quite broad, the most common and obvious of them are 1) uncontrolled proliferation, 2) resistance to programmed cell death (apoptosis), 3) tissue invasion and metastasis, and 4) sustained angiogenesis. Among the genes affected by cancer, those encoding ion channels are present. Membrane proteins responsible for signaling within cell and among cells, for coupling of extracellular events with intracellular responses, and for maintaining intracellular ionic homeostasis ion channels contribute to various extents to pathophysiological features of each cancer hallmark. Moreover, tight association of these hallmarks with ion channel dysfunction gives a good reason to classify them as special type of channelopathies, namely oncochannelopathies. Although the relation of cancer hallmarks to ion channel dysfunction differs from classical definition of channelopathies, as disease states causally linked with inherited mutations of ion channel genes that alter channel's biophysical properties, in a broader context of the disease state, to which pathogenesis ion channels essentially contribute, such classification seems absolutely appropriate. In this review the authors provide arguments to substantiate such point of view.
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Affiliation(s)
- Natalia Prevarskaya
- INSERM U-1003, Equipe Labellisée par la Ligue Nationale contre le Cancer et LABEX, Université Lille1 , Villeneuve d'Ascq , France ; Bogomoletz Institute of Physiology and International Center of Molecular Physiology, NASU, Kyiv-24, Ukraine
| | - Roman Skryma
- INSERM U-1003, Equipe Labellisée par la Ligue Nationale contre le Cancer et LABEX, Université Lille1 , Villeneuve d'Ascq , France ; Bogomoletz Institute of Physiology and International Center of Molecular Physiology, NASU, Kyiv-24, Ukraine
| | - Yaroslav Shuba
- INSERM U-1003, Equipe Labellisée par la Ligue Nationale contre le Cancer et LABEX, Université Lille1 , Villeneuve d'Ascq , France ; Bogomoletz Institute of Physiology and International Center of Molecular Physiology, NASU, Kyiv-24, Ukraine
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20
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Vicario M, Cieri D, Brini M, Calì T. The Close Encounter Between Alpha-Synuclein and Mitochondria. Front Neurosci 2018; 12:388. [PMID: 29930495 PMCID: PMC5999749 DOI: 10.3389/fnins.2018.00388] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 05/22/2018] [Indexed: 01/02/2023] Open
Abstract
The presynaptic protein alpha-synuclein (α-syn) is unequivocally linked to the development of Parkinson’s disease (PD). Not only it is the major component of amyloid fibrils found in Lewy bodies but mutations and duplication/triplication in its gene are responsible for the onset of familial autosomal dominant forms of PD. Nevertheless, the precise mechanisms leading to neuronal degeneration are not fully understood. Several lines of evidence suggest that impaired autophagy clearance and mitochondrial dysfunctions such as bioenergetics and calcium handling defects and alteration in mitochondrial morphology might play a pivotal role in the etiology and progression of PD, and indicate the intriguing possibility that α-syn could be involved in the control of mitochondrial function both in physiological and pathological conditions. In favor of this, it has been shown that a fraction of cellular α-syn can selectively localize to mitochondrial sub-compartments upon specific stimuli, highlighting possible novel routes for α-syn action. A plethora of mitochondrial processes, including cytochrome c release, calcium homeostasis, control of mitochondrial membrane potential and ATP production, is directly influenced by α-syn. Eventually, α-syn localization within mitochondria may also account for its aggregation state, making the α-syn/mitochondria intimate relationship a potential key for the understanding of PD pathogenesis. Here, we will deeply survey the recent literature in the field by focusing our attention on the processes directly controlled by α-syn within mitochondrial sub-compartments and its potential partners providing possible hints for future therapeutic targets.
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Affiliation(s)
- Mattia Vicario
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Domenico Cieri
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Marisa Brini
- Department of Biology, University of Padova, Padova, Italy
| | - Tito Calì
- Department of Biomedical Sciences, University of Padova, Padova, Italy.,Padova Neuroscience Center, University of Padova, Padova, Italy
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21
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Pulli I, Lassila T, Pan G, Yan D, Olkkonen VM, Törnquist K. Oxysterol-binding protein related-proteins (ORPs) 5 and 8 regulate calcium signaling at specific cell compartments. Cell Calcium 2018; 72:62-69. [PMID: 29748134 DOI: 10.1016/j.ceca.2018.03.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 03/02/2018] [Accepted: 03/12/2018] [Indexed: 12/24/2022]
Abstract
Oxysterol-binding protein related-protein 5 and 8 (ORP5/8) localize to the membrane contact sites (MCS) of the endoplasmic reticulum (ER) and the mitochondria, as well as to the ER-plasma membrane (PM) MCS. The MCS are emerging as important regulators of cell signaling events, including calcium (Ca2+) signaling. ORP5/8 have been shown to interact with phosphatidylinositol-4,5-bisphosphate (PIP2) in the PM, and to modulate mitochondrial respiration and morphology. PIP2 is the direct precursor of inositol trisphosphate (IP3), a key second messenger responsible for Ca2+-release from the intracellular Ca2+ stores. Further, mitochondrial respiration is linked to Ca2+ transfer from the ER to the mitochondria. Hence, we asked whether ORP5/8 would affect Ca2+ signaling in these cell compartments, and employed genetically engineered aequorin Ca2+ probes to investigate the effect of ORP5/8 in the regulation of mitochondrial and caveolar Ca2+. Our results show that ORP5/8 overexpression leads to increased mitochondrial matrix Ca2+ as well as to increased Ca2+ concentration at the caveolar subdomains of the PM during histamine stimulation, while having no effect on the cytoplasmic Ca2+. Also, we found that ORP5/8 overexpression increases cell proliferation. Our results show that ORP5/8 regulate Ca2+ signaling at specific MCS foci. These local ORP5/8-mediated Ca2+ signaling events are likely to play roles in processes such as mitochondrial respiration and cell proliferation.
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Affiliation(s)
- Ilari Pulli
- Åbo Akademi University, Tykistökatu 6A, 20520 Turku, Finland
| | - Taru Lassila
- Åbo Akademi University, Tykistökatu 6A, 20520 Turku, Finland
| | - Guoping Pan
- The Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Department of Biotechnology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Daoguang Yan
- The Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Department of Biotechnology, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Vesa M Olkkonen
- Minerva Foundation Institute For Medical Research, Biomedicum Helsinki, 00290 Helsinki, Finland; Department of Anatomy, Faculty of Medicine, FI-00014 University of Helsinki, Finland
| | - Kid Törnquist
- Åbo Akademi University, Tykistökatu 6A, 20520 Turku, Finland; Minerva Foundation Institute For Medical Research, Biomedicum Helsinki, 00290 Helsinki, Finland.
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22
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Knoll G, Bittner S, Kurz M, Jantsch J, Ehrenschwender M. Hypoxia regulates TRAIL sensitivity of colorectal cancer cells through mitochondrial autophagy. Oncotarget 2018; 7:41488-41504. [PMID: 27166192 PMCID: PMC5173074 DOI: 10.18632/oncotarget.9206] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 04/24/2016] [Indexed: 11/25/2022] Open
Abstract
The capacity of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) to selectively induce cell death in malignant cells triggered numerous attempts for therapeutic exploitation. In clinical trials, however, TRAIL did not live up to the expectations, as tumors exhibit high rates of TRAIL resistance in vivo. Response to anti-cancer therapy is determined not only by cancer cell intrinsic factors (e.g. oncogenic mutations), but also modulated by extrinsic factors such as the hypoxic tumor microenvironment.Here, we address the effect of hypoxia on pro-apoptotic TRAIL signaling in colorectal cancer cells. We show that oxygen levels modulate susceptibility to TRAIL-induced cell death, which is severely impaired under hypoxia (0.5% O2). Mechanistically, this is attributable to hypoxia-induced mitochondrial autophagy. Loss of mitochondria under hypoxia restricts the availability of mitochondria-derived pro-apoptotic molecules such as second mitochondria-derived activator of caspase (SMAC), thereby disrupting amplification of the apoptotic signal emanating from the TRAIL death receptors and efficiently blocking cell death in type-II cells. Moreover, we identify strategies to overcome TRAIL resistance in low oxygen environments. Counteracting hypoxia-induced loss of endogenous SMAC by exogenous substitution of SMAC mimetics fully restores TRAIL sensitivity in colorectal cancer cells. Alternatively, enforcing a mitochondria-independent type-I mode of cell death by targeting the type-II phenotype gatekeeper X-linked inhibitor of apoptosis protein (XIAP) is equally effective.Together, our results indicate that tumor hypoxia impairs TRAIL efficacy but this limitation can be overcome by combining TRAIL with SMAC mimetics or XIAP-targeting drugs. Our findings may help to exploit the potential of TRAIL in cancer therapy.
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Affiliation(s)
- Gertrud Knoll
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Sebastian Bittner
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Maria Kurz
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Jonathan Jantsch
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, 93053 Regensburg, Germany
| | - Martin Ehrenschwender
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, 93053 Regensburg, Germany
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23
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Notoginsenoside R1 Alleviates Oxygen-Glucose Deprivation/Reoxygenation Injury by Suppressing Endoplasmic Reticulum Calcium Release via PLC. Sci Rep 2017; 7:16226. [PMID: 29176553 PMCID: PMC5701215 DOI: 10.1038/s41598-017-16373-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 11/12/2017] [Indexed: 01/09/2023] Open
Abstract
As documented in our previous study, notoginsenoside R1 (NGR1) can inhibit neuron apoptosis and the expression of endoplasmic reticulum (ER) stress-associated pro-apoptotic proteins in hypoxic–ischemic encephalopathy. Recent evidence indicates that the Phospholipase C (PLC)/inositol 1,4,5-trisphosphate receptor (IP3R) is important for the regulation of Ca2+ release in the ER. Ca2+ imbalance can stimulate ER stress, CAMKII, and cell apoptosis. The purpose of this study was to further investigate the neuroprotective effect of NGR1 and elucidate how NGR1 regulates ER stress and cell apoptosis in the oxygen–glucose deprivation/reoxygenation (OGD/R) model. Cells were exposed to NGR1 or the PLC activator m-3M3FBS. Then, IP3R- and IP3-induced Ca2+ release (IICR) and activation of the ER stress and CaMKII signal pathway were measured. The results showed that NGR1 inhibited IICR and strengthened the binding of GRP78 with PERK and IRE1. NGR1 also alleviated the activation of the CaMKII pathway. Pretreatment with m-3M3FBS attenuated the neuroprotective effect of NGR1; IICR was activated, activation of the ER stress and CaMKII pathway was increased, and more cells were injured. These results indicate that NGR1 may suppress activation of the PLC/IP3R pathway, subsequently inhibiting ER Ca2+ release, ER stress, and CaMKII and resulting in suppressed cell apoptosis.
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24
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Chen JJ, Boehning D. Protein Lipidation As a Regulator of Apoptotic Calcium Release: Relevance to Cancer. Front Oncol 2017; 7:138. [PMID: 28706877 PMCID: PMC5489567 DOI: 10.3389/fonc.2017.00138] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 06/16/2017] [Indexed: 12/16/2022] Open
Abstract
Calcium is a critical regulator of cell death pathways. One of the most proximal events leading to cell death is activation of plasma membrane and endoplasmic reticulum-resident calcium channels. A large body of evidence indicates that defects in this pathway contribute to cancer development. Although we have a thorough understanding of how downstream elevations in cytosolic and mitochondrial calcium contribute to cell death, it is much less clear how calcium channels are activated upstream of the apoptotic stimulus. Recently, it has been shown that protein lipidation is a potent regulator of apoptotic signaling. Although classically thought of as a static modification, rapid and reversible protein acylation has emerged as a new signaling paradigm relevant to many pathways, including calcium release and cell death. In this review, we will discuss the role of protein lipidation in regulating apoptotic calcium signaling with direct therapeutic relevance to cancer.
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Affiliation(s)
- Jessica J Chen
- Department of Biochemistry and Molecular Biology, McGovern Medical School, UTHealth, Houston, TX, United States
| | - Darren Boehning
- Department of Biochemistry and Molecular Biology, McGovern Medical School, UTHealth, Houston, TX, United States
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25
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Genetically encoded calcium indicators for studying long-term calcium dynamics during apoptosis. Cell Calcium 2017; 61:44-49. [PMID: 28073595 DOI: 10.1016/j.ceca.2016.12.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 12/31/2016] [Accepted: 12/31/2016] [Indexed: 12/18/2022]
Abstract
Intracellular calcium release is essential for regulating almost all cellular functions. Specific spatio-temporal patterns of cytosolic calcium elevations are critical determinants of cell fate in response to pro-apoptotic cellular stressors. As the apoptotic program can take hours or days, measurement of long-term calcium dynamics are essential for understanding the mechanistic role of calcium in apoptotic cell death. Due to the technical limitations of using calcium-sensitive dyes to measure cytosolic calcium little is known about long-term calcium dynamics in living cells after treatment with apoptosis-inducing drugs. Genetically encoded calcium indicators could potentially overcome some of the limitations of calcium-sensitive dyes. Here, we compared the performance of the genetically encoded calcium indicators GCaMP6s and GCaMP6f with the ratiometric dye Fura-2. GCaMP6s performed as well or better than Fura-2 in detecting agonist-induced calcium transients. We then examined the utility of GCaMP6s for continuously measuring apoptotic calcium release over the course of ten hours after treatment with staurosporine. We found that GCaMP6s was suitable for measuring apoptotic calcium release over long time courses and revealed significant heterogeneity in calcium release dynamics in individual cells challenged with staurosporine. Our results suggest GCaMP6s is an excellent indicator for monitoring long-term changes cytosolic calcium during apoptosis.
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26
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Siegmund D, Lang I, Wajant H. Cell death-independent activities of the death receptors CD95, TRAILR1, and TRAILR2. FEBS J 2016; 284:1131-1159. [PMID: 27865080 DOI: 10.1111/febs.13968] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 11/10/2016] [Accepted: 11/17/2016] [Indexed: 12/25/2022]
Abstract
Since their identification more than 20 years ago, the death receptors CD95, TRAILR1, and TRAILR2 have been intensively studied with respect to their cell death-inducing activities. These receptors, however, can also trigger a variety of cell death-independent cellular responses reaching from the activation of proinflammatory gene transcription programs over the stimulation of proliferation and differentiation to induction of cell migration. The cell death-inducing signaling mechanisms of CD95 and the TRAIL death receptors are well understood. In contrast, despite the increasing recognition of the biological and pathophysiological relevance of the cell death-independent activities of CD95, TRAILR1, and TRAILR2, the corresponding signaling mechanisms are less understood and give no fully coherent picture. This review is focused on the cell death-independent activities of CD95 and the TRAIL death receptors and addresses mainly three questions: (a) how are these receptors linked to noncell death pathways at the molecular level, (b) which factors determine the balance of cell death and cell death-independent activities of CD95 and the TRAIL death receptors at the cellular level, and (c) what are the consequences of the cell death-independent functions of these receptors for their role in cancer and inflammatory diseases.
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Affiliation(s)
- Daniela Siegmund
- Division of Molecular Internal Medicine, Medical Clinic and Polyclinic II, University Hospital Würzburg, Germany
| | - Isabell Lang
- Division of Molecular Internal Medicine, Medical Clinic and Polyclinic II, University Hospital Würzburg, Germany
| | - Harald Wajant
- Division of Molecular Internal Medicine, Medical Clinic and Polyclinic II, University Hospital Würzburg, Germany
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27
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Garcia MI, Boehning D. Cardiac inositol 1,4,5-trisphosphate receptors. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2016; 1864:907-914. [PMID: 27884701 DOI: 10.1016/j.bbamcr.2016.11.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 11/16/2016] [Accepted: 11/16/2016] [Indexed: 10/20/2022]
Abstract
Calcium is a second messenger that regulates almost all cellular functions. In cardiomyocytes, calcium plays an integral role in many functions including muscle contraction, gene expression, and cell death. Inositol 1,4,5-trisphosphate receptors (IP3Rs) are a family of calcium channels that are ubiquitously expressed in all tissues. In the heart, IP3Rs have been associated with regulation of cardiomyocyte function in response to a variety of neurohormonal agonists, including those implicated in cardiac disease. Notably, IP3R activity is thought to be essential for mediating the hypertrophic response to multiple stimuli including endothelin-1 and angiotensin II. In this review, we will explore the functional implications of IP3R activity in the heart in health and disease.
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Affiliation(s)
- M Iveth Garcia
- Cell Biology Graduate Program, University of Texas Medical Branch, Galveston, TX 77555, United States; Department of Biochemistry and Molecular Biology, McGovern Medical School at UTHealth, Houston, TX 77030, United States
| | - Darren Boehning
- Department of Biochemistry and Molecular Biology, McGovern Medical School at UTHealth, Houston, TX 77030, United States.
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28
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Bahar E, Kim H, Yoon H. ER Stress-Mediated Signaling: Action Potential and Ca(2+) as Key Players. Int J Mol Sci 2016; 17:ijms17091558. [PMID: 27649160 PMCID: PMC5037829 DOI: 10.3390/ijms17091558] [Citation(s) in RCA: 149] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 09/06/2016] [Accepted: 09/09/2016] [Indexed: 01/24/2023] Open
Abstract
The proper functioning of the endoplasmic reticulum (ER) is crucial for multiple cellular activities and survival. Disturbances in the normal ER functions lead to the accumulation and aggregation of unfolded proteins, which initiates an adaptive response, the unfolded protein response (UPR), in order to regain normal ER functions. Failure to activate the adaptive response initiates the process of programmed cell death or apoptosis. Apoptosis plays an important role in cell elimination, which is essential for embryogenesis, development, and tissue homeostasis. Impaired apoptosis can lead to the development of various pathological conditions, such as neurodegenerative and autoimmune diseases, cancer, or acquired immune deficiency syndrome (AIDS). Calcium (Ca(2+)) is one of the key regulators of cell survival and it can induce ER stress-mediated apoptosis in response to various conditions. Ca(2+) regulates cell death both at the early and late stages of apoptosis. Severe Ca(2+) dysregulation can promote cell death through apoptosis. Action potential, an electrical signal transmitted along the neurons and muscle fibers, is important for conveying information to, from, and within the brain. Upon the initiation of the action potential, increased levels of cytosolic Ca(2+) (depolarization) lead to the activation of the ER stress response involved in the initiation of apoptosis. In this review, we discuss the involvement of Ca(2+) and action potential in ER stress-mediated apoptosis.
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Affiliation(s)
- Entaz Bahar
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Gyeongsang National University, Jinju 52828, Gyeongnam, Korea.
| | - Hyongsuk Kim
- Department of Electronics Engineering, Chonbuk National University, Jeonju 54896, Jeonbuk, Korea.
| | - Hyonok Yoon
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Gyeongsang National University, Jinju 52828, Gyeongnam, Korea.
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29
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Planells-Ferrer L, Urresti J, Coccia E, Galenkamp KMO, Calleja-Yagüe I, López-Soriano J, Carriba P, Barneda-Zahonero B, Segura MF, Comella JX. Fas apoptosis inhibitory molecules: more than death-receptor antagonists in the nervous system. J Neurochem 2016; 139:11-21. [DOI: 10.1111/jnc.13729] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 06/14/2016] [Accepted: 07/02/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Laura Planells-Ferrer
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Jorge Urresti
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Elena Coccia
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Koen M. O. Galenkamp
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Isabel Calleja-Yagüe
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Joaquín López-Soriano
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Paulina Carriba
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Bruna Barneda-Zahonero
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
| | - Miguel F. Segura
- Group of Translational Research in Childhood and Adolescent Cancer; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
| | - Joan X. Comella
- Cell Signaling and Apoptosis Group; Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron (VHIR); Barcelona Spain
- Institut de Neurociències; Departament de Bioquímica i Biologia Molecular; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Madrid Spain
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30
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Abdullahi A, Jeschke MG. White Adipose Tissue Browning: A Double-edged Sword. Trends Endocrinol Metab 2016; 27:542-552. [PMID: 27397607 PMCID: PMC5234861 DOI: 10.1016/j.tem.2016.06.006] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 06/09/2016] [Accepted: 06/13/2016] [Indexed: 12/16/2022]
Abstract
The study of white adipose tissue (WAT) 'browning' has become a 'hot topic' in various acute and chronic metabolic conditions, based on the idea that WAT browning might be able to facilitate weight loss and improve metabolic health. However, this view cannot be translated into all areas of medicine. Recent studies identified effects of browning associated with adverse outcomes, and as more studies are being conducted, a very different picture has emerged about WAT browning and its detrimental effect in acute and chronic hypermetabolic conditions. Therefore, the notion that browning is supposedly beneficial may be inadequate. In this review we analyze how and why browning in chronic hypermetabolic associated diseases can be detrimental and lead to adverse outcomes.
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Affiliation(s)
- Abdikarim Abdullahi
- Institute of Medical Science, University of Toronto, Canada; Sunnybrook Research Institute, Totonto, Canada
| | - Marc G Jeschke
- Institute of Medical Science, University of Toronto, Canada; Sunnybrook Research Institute, Totonto, Canada; Ross Tilley Burn Centre, Sunnybrook Health Sciences Centre, University of Toronto, Canada; Department of Surgery, Division of Plastic Surgery, Department of Immunology, University of Toronto, Canada.
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31
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Zhu J, Lin FH, Zhang J, Lin J, Li H, Li YW, Tan XW, Tan JH. The signaling pathways by which the Fas/FasL system accelerates oocyte aging. Aging (Albany NY) 2016; 8:291-303. [PMID: 26869336 PMCID: PMC4789583 DOI: 10.18632/aging.100893] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 01/25/2016] [Indexed: 06/05/2023]
Abstract
In spite of great efforts, the mechanisms for postovulatory oocyte aging are not fully understood. Although our previous work showed that the FasL/Fas signaling facilitated oocyte aging, the intra-oocyte signaling pathways are unknown. Furthermore, the mechanisms by which oxidative stress facilitates oocyte aging and the causal relationship between Ca2+ rises and caspase-3 activation and between the cell cycle and apoptosis during oocyte aging need detailed investigations. Our aim was to address these issues by studying the intra-oocyte signaling pathways for Fas/FasL to accelerate oocyte aging. The results indicated that sFasL released by cumulus cells activated Fas on the oocyte by increasing reactive oxygen species via activating NADPH oxidase. The activated Fas triggered Ca2+ release from the endoplasmic reticulum by activating phospholipase C-γ pathway and cytochrome c pathway. The cytoplasmic Ca2+ rises activated calcium/calmodulin-dependent protein kinase II (CaMKII) and caspase-3. While activated CaMKII increased oocyte susceptibility to activation by inactivating maturation-promoting factor (MPF) through cyclin B degradation, the activated caspase-3 facilitated further Ca2+releasing that activates more caspase-3 leading to oocyte fragmentation. Furthermore, caspase-3 activation and fragmentation were prevented in oocytes with a high MPF activity, suggesting that an oocyte must be in interphase to undergo apoptosis.
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Affiliation(s)
- Jiang Zhu
- College of Life Science, Northeast Agricultural University, Harbin, 150030, P. R. China
- Department of Assisted Reproduction Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, 200011, P. R. China
| | - Fei-Hu Lin
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - Jie Zhang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - Juan Lin
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - Hong Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - You-Wei Li
- College of Life Science, Northeast Agricultural University, Harbin, 150030, P. R. China
| | - Xiu-Wen Tan
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - Jing-He Tan
- College of Life Science, Northeast Agricultural University, Harbin, 150030, P. R. China
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
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32
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Garofalo T, Manganelli V, Grasso M, Mattei V, Ferri A, Misasi R, Sorice M. Role of mitochondrial raft-like microdomains in the regulation of cell apoptosis. Apoptosis 2015; 20:621-34. [PMID: 25652700 DOI: 10.1007/s10495-015-1100-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Lipid rafts are envisaged as lateral assemblies of specific lipids and proteins that dissociate and associate rapidly and form functional clusters in cell membranes. These structural platforms are not confined to the plasma membrane; indeed lipid microdomains are similarly formed at subcellular organelles, which include endoplasmic reticulum, Golgi and mitochondria, named raft-like microdomains. In addition, some components of raft-like microdomains are present within ER-mitochondria associated membranes. This review is focused on the role of mitochondrial raft-like microdomains in the regulation of cell apoptosis, since these microdomains may represent preferential sites where key reactions take place, regulating mitochondria hyperpolarization, fission-associated changes, megapore formation and release of apoptogenic factors. These structural platforms appear to modulate cytoplasmic pathways switching cell fate towards cell survival or death. Main insights on this issue derive from some pathological conditions in which alterations of microdomains structure or function can lead to severe alterations of cell activity and life span. In the light of the role played by raft-like microdomains to integrate apoptotic signals and in regulating mitochondrial dynamics, it is conceivable that these membrane structures may play a role in the mitochondrial alterations observed in some of the most common human neurodegenerative diseases, such as Amyotrophic lateral sclerosis, Huntington's chorea and prion-related diseases. These findings introduce an additional task for identifying new molecular target(s) of pharmacological agents in these pathologies.
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Affiliation(s)
- Tina Garofalo
- Department of Experimental Medicine, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
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33
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Urresti J, Ruiz-Meana M, Coccia E, Arévalo JC, Castellano J, Fernández-Sanz C, Galenkamp KMO, Planells-Ferrer L, Moubarak RS, Llecha-Cano N, Reix S, García-Dorado D, Barneda-Zahonero B, Comella JX. Lifeguard Inhibits Fas Ligand-mediated Endoplasmic Reticulum-Calcium Release Mandatory for Apoptosis in Type II Apoptotic Cells. J Biol Chem 2015; 291:1221-34. [PMID: 26582200 DOI: 10.1074/jbc.m115.677682] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Indexed: 12/29/2022] Open
Abstract
Death receptors are members of the tumor necrosis factor receptor superfamily involved in the extrinsic apoptotic pathway. Lifeguard (LFG) is a death receptor antagonist mainly expressed in the nervous system that specifically blocks Fas ligand (FasL)-induced apoptosis. To investigate its mechanism of action, we studied its subcellular localization and its interaction with members of the Bcl-2 family proteins. We performed an analysis of LFG subcellular localization in murine cortical neurons and found that LFG localizes mainly to the ER and Golgi. We confirmed these results with subcellular fractionation experiments. Moreover, we show by co-immunoprecipitation experiments that LFG interacts with Bcl-XL and Bcl-2, but not with Bax or Bak, and this interaction likely occurs in the endoplasmic reticulum. We further investigated the relationship between LFG and Bcl-XL in the inhibition of apoptosis and found that LFG protects only type II apoptotic cells from FasL-induced death in a Bcl-XL dependent manner. The observation that LFG itself is not located in mitochondria raises the question as to whether LFG in the ER participates in FasL-induced death. Indeed, we investigated the degree of calcium mobilization after FasL stimulation and found that LFG inhibits calcium release from the ER, a process that correlates with LFG blockage of cytochrome c release to the cytosol and caspase activation. On the basis of our observations, we propose that there is a required step in the induction of type II apoptotic cell death that involves calcium mobilization from the ER and that this step is modulated by LFG.
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Affiliation(s)
- Jorge Urresti
- From the Cell Signaling and Apoptosis Group and the Institut de Neurociències, Departament de Bioquímica i Biologia Molecular, Facultat de Medicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Marisol Ruiz-Meana
- Laboratory of Experimental Cardiology, Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron, 08035 Barcelona, Spain
| | | | - Juan Carlos Arévalo
- the Department of Cell Biology and Pathology, Instituto de Neurociencias de Castilla y León, Universidad de Salamanca, Salamanca 37007, Spain, and the Institute of Biomedical Research of Salamanca, Salamanca 37007, Spain
| | - José Castellano
- Laboratory of Experimental Cardiology, Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron, 08035 Barcelona, Spain
| | - Celia Fernández-Sanz
- Laboratory of Experimental Cardiology, Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron, 08035 Barcelona, Spain
| | | | - Laura Planells-Ferrer
- From the Cell Signaling and Apoptosis Group and the Institut de Neurociències, Departament de Bioquímica i Biologia Molecular, Facultat de Medicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | | | | | | | - David García-Dorado
- Laboratory of Experimental Cardiology, Institut de Recerca de l'Hospital Universitari de la Vall d'Hebron, 08035 Barcelona, Spain
| | - Bruna Barneda-Zahonero
- From the Cell Signaling and Apoptosis Group and the Institut de Neurociències, Departament de Bioquímica i Biologia Molecular, Facultat de Medicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain,
| | - Joan X Comella
- From the Cell Signaling and Apoptosis Group and the Institut de Neurociències, Departament de Bioquímica i Biologia Molecular, Facultat de Medicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain,
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Rapid and transient palmitoylation of the tyrosine kinase Lck mediates Fas signaling. Proc Natl Acad Sci U S A 2015; 112:11876-80. [PMID: 26351666 DOI: 10.1073/pnas.1509929112] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Palmitoylation is the posttranslational modification of proteins with a 16-carbon fatty acid chain through a labile thioester bond. The reversibility of protein palmitoylation and its profound effect on protein function suggest that this modification could play an important role as an intracellular signaling mechanism. Evidence that palmitoylation of proteins occurs with the kinetics required for signal transduction is not clear, however. Here we show that engagement of the Fas receptor by its ligand leads to an extremely rapid and transient increase in palmitoylation levels of the tyrosine kinase Lck. Lck palmitoylation kinetics are consistent with the activation of downstream signaling proteins, such as Zap70 and PLC-γ1. Inhibiting Lck palmitoylation not only disrupts proximal Fas signaling events, but also renders cells resistant to Fas-mediated apoptosis. Knockdown of the palmitoyl acyl transferase DHHC21 eliminates activation of Lck and downstream signaling after Fas receptor stimulation. Our findings demonstrate highly dynamic Lck palmitoylation kinetics that are essential for signaling downstream of the Fas receptor.
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Martinez-Torres AC, Quiney C, Attout T, Boullet H, Herbi L, Vela L, Barbier S, Chateau D, Chapiro E, Nguyen-Khac F, Davi F, Le Garff-Tavernier M, Moumné R, Sarfati M, Karoyan P, Merle-Béral H, Launay P, Susin SA. CD47 agonist peptides induce programmed cell death in refractory chronic lymphocytic leukemia B cells via PLCγ1 activation: evidence from mice and humans. PLoS Med 2015; 12:e1001796. [PMID: 25734483 PMCID: PMC4348493 DOI: 10.1371/journal.pmed.1001796] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 01/23/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Chronic lymphocytic leukemia (CLL), the most common adulthood leukemia, is characterized by the accumulation of abnormal CD5+ B lymphocytes, which results in a progressive failure of the immune system. Despite intense research efforts, drug resistance remains a major cause of treatment failure in CLL, particularly in patients with dysfunctional TP53. The objective of our work was to identify potential approaches that might overcome CLL drug refractoriness by examining the pro-apoptotic potential of targeting the cell surface receptor CD47 with serum-stable agonist peptides. METHODS AND FINDINGS In peripheral blood samples collected from 80 patients with CLL with positive and adverse prognostic features, we performed in vitro genetic and molecular analyses that demonstrate that the targeting of CD47 with peptides derived from the C-terminal domain of thrombospondin-1 efficiently kills the malignant CLL B cells, including those from high-risk individuals with a dysfunctional TP53 gene, while sparing the normal T and B lymphocytes from the CLL patients. Further studies reveal that the differential response of normal B lymphocytes, collected from 20 healthy donors, and leukemic B cells to CD47 peptide targeting results from the sustained activation in CLL B cells of phospholipase C gamma-1 (PLCγ1), a protein that is significantly over-expressed in CLL. Once phosphorylated at tyrosine 783, PLCγ1 enables a Ca2+-mediated, caspase-independent programmed cell death (PCD) pathway that is not down-modulated by the lymphocyte microenvironment. Accordingly, down-regulation of PLCγ1 or pharmacological inhibition of PLCγ1 phosphorylation abolishes CD47-mediated killing. Additionally, in a CLL-xenograft model developed in NOD/scid gamma mice, we demonstrate that the injection of CD47 agonist peptides reduces tumor burden without inducing anemia or toxicity in blood, liver, or kidney. The limitations of our study are mainly linked to the affinity of the peptides targeting CD47, which might be improved to reach the standard requirements in drug development, and the lack of a CLL animal model that fully mimics the human disease. CONCLUSIONS Our work provides substantial progress in (i) the development of serum-stable CD47 agonist peptides that are highly effective at inducing PCD in CLL, (ii) the understanding of the molecular events regulating a novel PCD pathway that overcomes CLL apoptotic avoidance, (iii) the identification of PLCγ1 as an over-expressed protein in CLL B cells, and (iv) the description of a novel peptide-based strategy against CLL.
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MESH Headings
- Aged
- Aged, 80 and over
- Animals
- Apoptosis/drug effects
- B-Lymphocytes/metabolism
- CD47 Antigen/metabolism
- Drug Resistance, Neoplasm
- Female
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/blood
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Male
- Mice
- Mice, Inbred NOD
- Middle Aged
- Peptides/pharmacology
- Peptides/therapeutic use
- Phospholipase C gamma/metabolism
- Thrombospondin 1/therapeutic use
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Affiliation(s)
- Ana-Carolina Martinez-Torres
- Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
| | - Claire Quiney
- Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
| | - Tarik Attout
- INSERM U1149, Paris, France
- Faculté de Médecine, Site Xavier Bichat, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Heloïse Boullet
- Laboratoire des Biomolécules, UMR 7203 and FR 2769, Sorbonne Universités, Université Pierre et Marie Curie, Paris, France
- Centre National de la Recherche Scientifique, UMR 7203, Paris, France
- Département de Chimie, École Normale Supérieure, Paris, France
| | - Linda Herbi
- Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
| | - Laura Vela
- Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
| | - Sandrine Barbier
- Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
| | - Danielle Chateau
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Intestine: Nutrition, Barrier, and Diseases Team, INSERM U1138, Centre de Recherche des Cordeliers, Paris, France
| | - Elise Chapiro
- Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Service d’Hématologie Biologique, Groupe Hospitalier Pitié-Salpêtrière, Assistance Publique—Hôpitaux de Paris, Paris, France
| | - Florence Nguyen-Khac
- Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Service d’Hématologie Biologique, Groupe Hospitalier Pitié-Salpêtrière, Assistance Publique—Hôpitaux de Paris, Paris, France
| | - Frédéric Davi
- Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Service d’Hématologie Biologique, Groupe Hospitalier Pitié-Salpêtrière, Assistance Publique—Hôpitaux de Paris, Paris, France
| | - Magali Le Garff-Tavernier
- Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Service d’Hématologie Biologique, Groupe Hospitalier Pitié-Salpêtrière, Assistance Publique—Hôpitaux de Paris, Paris, France
| | - Roba Moumné
- Laboratoire des Biomolécules, UMR 7203 and FR 2769, Sorbonne Universités, Université Pierre et Marie Curie, Paris, France
- Centre National de la Recherche Scientifique, UMR 7203, Paris, France
- Département de Chimie, École Normale Supérieure, Paris, France
| | - Marika Sarfati
- Immunoregulation Laboratory, Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montréal, Quebec, Canada
| | - Philippe Karoyan
- Laboratoire des Biomolécules, UMR 7203 and FR 2769, Sorbonne Universités, Université Pierre et Marie Curie, Paris, France
- Centre National de la Recherche Scientifique, UMR 7203, Paris, France
- Département de Chimie, École Normale Supérieure, Paris, France
| | - Hélène Merle-Béral
- Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Service d’Hématologie Biologique, Groupe Hospitalier Pitié-Salpêtrière, Assistance Publique—Hôpitaux de Paris, Paris, France
| | - Pierre Launay
- INSERM U1149, Paris, France
- Faculté de Médecine, Site Xavier Bichat, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Santos A. Susin
- Cell Death and Drug Resistance in Lymphoproliferative Disorders Team, INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, UMRS1138, Centre de Recherche des Cordeliers, Paris, France
- * E-mail:
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36
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Hedgepeth SC, Garcia MI, Wagner LE, Rodriguez AM, Chintapalli SV, Snyder RR, Hankins GDV, Henderson BR, Brodie KM, Yule DI, van Rossum DB, Boehning D. The BRCA1 tumor suppressor binds to inositol 1,4,5-trisphosphate receptors to stimulate apoptotic calcium release. J Biol Chem 2015; 290:7304-13. [PMID: 25645916 DOI: 10.1074/jbc.m114.611186] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The inositol 1,4,5-trisphosphate receptor (IP3R) is a ubiquitously expressed endoplasmic reticulum (ER)-resident calcium channel. Calcium release mediated by IP3Rs influences many signaling pathways, including those regulating apoptosis. IP3R activity is regulated by protein-protein interactions, including binding to proto-oncogenes and tumor suppressors to regulate cell death. Here we show that the IP3R binds to the tumor suppressor BRCA1. BRCA1 binding directly sensitizes the IP3R to its ligand, IP3. BRCA1 is recruited to the ER during apoptosis in an IP3R-dependent manner, and, in addition, a pool of BRCA1 protein is constitutively associated with the ER under non-apoptotic conditions. This is likely mediated by a novel lipid binding activity of the first BRCA1 C terminus domain of BRCA1. These findings provide a mechanistic explanation by which BRCA1 can act as a proapoptotic protein.
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Affiliation(s)
- Serena C Hedgepeth
- From the Department of Biochemistry and Molecular Biology, University of Texas Health Science Center at Houston, Houston, Texas 77030, the Cell Biology Graduate Program and
| | - M Iveth Garcia
- From the Department of Biochemistry and Molecular Biology, University of Texas Health Science Center at Houston, Houston, Texas 77030, the Cell Biology Graduate Program and
| | - Larry E Wagner
- the Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, New York 14642
| | - Ana M Rodriguez
- the Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Sree V Chintapalli
- the Department of Biology, Penn State University, University Park, Pennsylvania, 16802, and
| | - Russell R Snyder
- the Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Gary D V Hankins
- the Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Beric R Henderson
- the Centre for Cancer Research, Westmead Millennium Institute at Westmead Hospital, The University of Sydney, Westmead, New South Wales 2145, Australia
| | - Kirsty M Brodie
- the Centre for Cancer Research, Westmead Millennium Institute at Westmead Hospital, The University of Sydney, Westmead, New South Wales 2145, Australia
| | - David I Yule
- the Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, New York 14642
| | - Damian B van Rossum
- the Department of Biology, Penn State University, University Park, Pennsylvania, 16802, and
| | - Darren Boehning
- From the Department of Biochemistry and Molecular Biology, University of Texas Health Science Center at Houston, Houston, Texas 77030,
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37
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Borahay MA, Kilic GS, Yallampalli C, Snyder RR, Hankins GDV, Al-Hendy A, Boehning D. Simvastatin potently induces calcium-dependent apoptosis of human leiomyoma cells. J Biol Chem 2014; 289:35075-86. [PMID: 25359773 DOI: 10.1074/jbc.m114.583575] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Statins are drugs commonly used for the treatment of high plasma cholesterol levels. Beyond these well known lipid-lowering properties, they possess broad-reaching effects in vivo, including antitumor effects. Statins inhibit the growth of multiple tumors. However, the mechanisms remain incompletely understood. Here we show that simvastatin inhibits the proliferation of human leiomyoma cells. This was associated with decreased mitogen-activated protein kinase signaling and multiple changes in cell cycle progression. Simvastatin potently stimulated leiomyoma cell apoptosis in a manner mechanistically dependent upon apoptotic calcium release from voltage-gated calcium channels. Therefore, simvastatin possesses antitumor effects that are dependent upon the apoptotic calcium release machinery.
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Affiliation(s)
- Mostafa A Borahay
- From the Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas 77555, the Department of Biochemistry and Molecular Biology, University of Texas Health Sciences Center at Houston, Houston, Texas 77030,
| | - Gokhan S Kilic
- From the Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Chandrasekha Yallampalli
- the Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas 77030, and
| | - Russell R Snyder
- From the Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Gary D V Hankins
- From the Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Ayman Al-Hendy
- the Department of Obstetrics and Gynecology, Georgia Regents University, Augusta, Georgia 30912
| | - Darren Boehning
- the Department of Biochemistry and Molecular Biology, University of Texas Health Sciences Center at Houston, Houston, Texas 77030,
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38
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Ivanova H, Vervliet T, Missiaen L, Parys JB, De Smedt H, Bultynck G. Inositol 1,4,5-trisphosphate receptor-isoform diversity in cell death and survival. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2014; 1843:2164-83. [PMID: 24642269 DOI: 10.1016/j.bbamcr.2014.03.007] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 03/06/2014] [Accepted: 03/09/2014] [Indexed: 01/22/2023]
Abstract
Cell-death and -survival decisions are critically controlled by intracellular Ca(2+) homeostasis and dynamics at the level of the endoplasmic reticulum (ER). Inositol 1,4,5-trisphosphate (IP3) receptors (IP3Rs) play a pivotal role in these processes by mediating Ca(2+) flux from the ER into the cytosol and mitochondria. Hence, it is clear that many pro-survival and pro-death signaling pathways and proteins affect Ca(2+) signaling by directly targeting IP3R channels, which can happen in an IP3R-isoform-dependent manner. In this review, we will focus on how the different IP3R isoforms (IP3R1, IP3R2 and IP3R3) control cell death and survival. First, we will present an overview of the isoform-specific regulation of IP3Rs by cellular factors like IP3, Ca(2+), Ca(2+)-binding proteins, adenosine triphosphate (ATP), thiol modification, phosphorylation and interacting proteins, and of IP3R-isoform specific expression patterns. Second, we will discuss the role of the ER as a Ca(2+) store in cell death and survival and how IP3Rs and pro-survival/pro-death proteins can modulate the basal ER Ca(2+) leak. Third, we will review the regulation of the Ca(2+)-flux properties of the IP3R isoforms by the ER-resident and by the cytoplasmic proteins involved in cell death and survival as well as by redox regulation. Hence, we aim to highlight the specific roles of the various IP3R isoforms in cell-death and -survival signaling. This article is part of a Special Issue entitled: Calcium signaling in health and disease. Guest Editors: Geert Bultynck, Jacques Haiech, Claus W. Heizmann, Joachim Krebs, and Marc Moreau.
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Affiliation(s)
- Hristina Ivanova
- KU Leuven Lab. of Molecular and Cellular Signaling, Dept. of Cellular and Molecular Medicine, Campus Gasthuisberg O&N I Box 802, Herestraat 49, BE-3000 Leuven, Belgium
| | - Tim Vervliet
- KU Leuven Lab. of Molecular and Cellular Signaling, Dept. of Cellular and Molecular Medicine, Campus Gasthuisberg O&N I Box 802, Herestraat 49, BE-3000 Leuven, Belgium
| | - Ludwig Missiaen
- KU Leuven Lab. of Molecular and Cellular Signaling, Dept. of Cellular and Molecular Medicine, Campus Gasthuisberg O&N I Box 802, Herestraat 49, BE-3000 Leuven, Belgium
| | - Jan B Parys
- KU Leuven Lab. of Molecular and Cellular Signaling, Dept. of Cellular and Molecular Medicine, Campus Gasthuisberg O&N I Box 802, Herestraat 49, BE-3000 Leuven, Belgium
| | - Humbert De Smedt
- KU Leuven Lab. of Molecular and Cellular Signaling, Dept. of Cellular and Molecular Medicine, Campus Gasthuisberg O&N I Box 802, Herestraat 49, BE-3000 Leuven, Belgium.
| | - Geert Bultynck
- KU Leuven Lab. of Molecular and Cellular Signaling, Dept. of Cellular and Molecular Medicine, Campus Gasthuisberg O&N I Box 802, Herestraat 49, BE-3000 Leuven, Belgium.
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39
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Cerella C, Dicato M, Diederich M. Assembling the puzzle of anti-cancer mechanisms triggered by cardiac glycosides. Mitochondrion 2013; 13:225-34. [DOI: 10.1016/j.mito.2012.06.003] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 06/12/2012] [Accepted: 06/19/2012] [Indexed: 02/04/2023]
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40
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Xu M, Li X, Walsh SW, Zhang Y, Abais JM, Boini KM, Li PL. Intracellular two-phase Ca2+ release and apoptosis controlled by TRP-ML1 channel activity in coronary arterial myocytes. Am J Physiol Cell Physiol 2013; 304:C458-66. [PMID: 23283937 PMCID: PMC3602645 DOI: 10.1152/ajpcell.00342.2012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Accepted: 01/02/2013] [Indexed: 11/22/2022]
Abstract
Activation of the death receptor Fas has been reported to produce a two-phase intracellular Ca(2+) release response in coronary arterial myocytes (CAMs), which consists of local Ca(2+) bursts via lysosomal transient potential receptor-mucolipin 1 (TRP-ML1) channels and consequent Ca(2+) release from the sarcoplasmic reticulum (SR). The present study was designed to explore the molecular mechanism by which lysosomal Ca(2+) bursts are coupled with SR Ca(2+) release in mouse CAMs and to determine the functional relevance of this lysosome-associated two-phase Ca(2+) release to apoptosis, a common action of Fas activation with Fas ligand (FasL). By confocal microscopy, we found that transfection of CAMs with TRP-ML1 small interfering (si)RNA substantially inhibited FasL (10 ng/ml)-induced lysosome Ca(2+) bursts and consequent SR Ca(2+) release. In contrast, transfection of CAMs with plasmids containing a full-length TRP-ML1 gene enhanced FasL-induced two-phase Ca(2+) release. We further demonstrated that FasL significantly increased the colocalization of the lysosomal marker Lamp1 with ryanodine receptor 3 and enhanced a dynamic trafficking of lysosomes to the SR. When CAMs were treated with TRP-ML1 siRNA, FasL-induced interactions between the lysosomes and SR were substantially blocked. Functionally, FasL-induced apoptosis and activation of calpain and calcineurin, the Ca(2+) sensitive proteins that mediate apoptosis, were significantly attenuated by silencing TRP-ML1 gene but enhanced by overexpression of TRP-ML1 gene. These results suggest that TRP-ML1 channel-mediated lysosomal Ca(2+) bursts upon FasL stimulation promote lysosome trafficking and interactions with the SR, leading to apoptosis of CAMs via a Ca(2+)-dependent mechanism.
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Affiliation(s)
- Ming Xu
- Department of Pharmacology and Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, VA 23298, USA
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41
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Decrock E, De Bock M, Wang N, Gadicherla AK, Bol M, Delvaeye T, Vandenabeele P, Vinken M, Bultynck G, Krysko DV, Leybaert L. IP3, a small molecule with a powerful message. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2013; 1833:1772-86. [PMID: 23291251 DOI: 10.1016/j.bbamcr.2012.12.016] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 12/18/2012] [Accepted: 12/19/2012] [Indexed: 12/22/2022]
Abstract
Research conducted over the past two decades has provided convincing evidence that cell death, and more specifically apoptosis, can exceed single cell boundaries and can be strongly influenced by intercellular communication networks. We recently reported that gap junctions (i.e. channels directly connecting the cytoplasm of neighboring cells) composed of connexin43 or connexin26 provide a direct pathway to promote and expand cell death, and that inositol 1,4,5-trisphosphate (IP3) diffusion via these channels is crucial to provoke apoptosis in adjacent healthy cells. However, IP3 itself is not sufficient to induce cell death and additional factors appear to be necessary to create conditions in which IP3 will exert proapoptotic effects. Although IP3-evoked Ca(2+) signaling is known to be required for normal cell survival, it is also actively involved in apoptosis induction and progression. As such, it is evident that an accurate fine-tuning of this signaling mechanism is crucial for normal cell physiology, while a malfunction can lead to cell death. Here, we review the role of IP3 as an intracellular and intercellular cell death messenger, focusing on the endoplasmic reticulum-mitochondrial synapse, followed by a discussion of plausible elements that can convert IP3 from a physiological molecule to a killer substance. Finally, we highlight several pathological conditions in which anomalous intercellular IP3/Ca(2+) signaling might play a role. This article is part of a Special Issue entitled:12th European Symposium on Calcium.
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Affiliation(s)
- Elke Decrock
- Department of Basic Medical Sciences, Ghent University, Ghent, Belgium
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42
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Caspase 3 cleavage of the inositol 1,4,5-trisphosphate receptor does not contribute to apoptotic calcium release. Cell Calcium 2012; 53:152-8. [PMID: 23122728 DOI: 10.1016/j.ceca.2012.10.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 10/02/2012] [Accepted: 10/05/2012] [Indexed: 01/26/2023]
Abstract
An important role in the regulation of apoptotic calcium release is played by the ubiquitously expressed family of inositol 1,4,5-trisphosphate receptor (IP(3)R) channels. One model for IP(3)R activation during apoptosis is cleavage by the apoptotic protease caspase 3. Here we show that early elevations in cytosolic calcium during apoptosis do not require caspase 3 activity. We detected a robust increase in calcium levels in response to staurosporine treatment in primary human fibroblasts and HeLa cells in the presence of the caspase inhibitor Z-VAD, indicating that calcium release during the initiation of apoptosis occurs independently of caspase 3. Similar results were obtained with MCF-7 cells which lack caspase 3 expression. Stable expression of caspase 3 in MCF-7 cells and TAT-based transduction of the active recombinant caspase 3 directly into living MCF-7 cells had marginal effects on the early events leading to cytosolic calcium elevations and irreversible commitment to apoptotic cell death. Significantly, blocking IP(3) binding to the IP(3)R with an IP(3) sponge resulted in suppression of staurosporine-induced calcium release and cell death. Collectively, our results suggest that generation of IP(3) is sufficient for the initiation of apoptotic calcium signaling, and caspase 3-mediated truncation of IP(3)R channel is a consequence, not causative, of apoptotic calcium release.
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43
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Li J, Wang P, Yu S, Zheng Z, Xu X. Calcium entry mediates hyperglycemia-induced apoptosis through Ca(2+)/calmodulin-dependent kinase II in retinal capillary endothelial cells. Mol Vis 2012; 18:2371-9. [PMID: 23049237 PMCID: PMC3462598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 09/18/2012] [Indexed: 11/28/2022] Open
Abstract
PURPOSE Hyperglycemia-induced vascular cell apoptosis is a seminal early event in diabetic retinopathy. Prolonged hyperglycemia is known to increase intracellular cytosolic free calcium ([Ca(2+)]i) in retinal vascular endothelial cells (RECs), suggesting that [Ca(2+)]i is a critical trigger for microvascular degeneration. This study aims to elucidate Ca(2+)-dependent signaling mechanisms that mediate hyperglycemia-induced apoptosis in RECs. METHODS A cultured macaque choroid-retinal endothelial cell line (RF/6A) was incubated in normal glucose (NG), NG plus the Ca(2+) entry blocker 2-aminoethoxydiphenyl borate (2-APB), high glucose (HG), or HG plus either 2-APB, the c-jun N-terminal kinase (JNK) inhibitor SP600125, or the calcium/calmodulin-dependent protein kinase II (CaMKII) inhibitor KN93. Changes in [Ca(2+)]i evoked by adenosine 5'-triphosphate (ATP) were measured in fluo-3/AM-loaded RF/6A cells by confocal microscopy. The mitochondrial membrane potential (ΔΨm) and apoptosis were assessed by flow cytometry. Expression levels of CaMKII, phosphorylated CaMKII (p-CaMKII), c-Jun N-terminal kinase (JNK), phosphorylated JNK (p-JNK), the death receptor (Fas), and cytochrome c were detected by western blotting analysis. RESULTS Prolonged exposure to HG (96 h) potentiated ATP-evoked Ca(2+) entry as well as CaMKII phosphorylation and RF/6A cell apoptosis. Enhanced apoptosis was blocked by 2-APB and KN93. Furthermore, HG increased JNK phosphorylation and Fas expression, and both responses were partially blocked by 2-APB and KN93, while the JNK inhibitor SP600125 partially reduced HG-induced Fas expression. In addition, HG depolarized the ΔΨm and triggered the release of mitochondrial cytochrome c. These early signs of mitochondria-dependent apoptosis were partially reversed by 2-APB and KN93. CONCLUSIONS HG-induced apoptosis in RF/6A cells depends on Ca(2+) entry and CaMKII activation, leading to the activation of both Fas-dependent and mitochondria-dependent apoptosis pathways. The CaMKII-JNK-Fas pathway is involved in HG-evoked apoptosis of RECs.
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Affiliation(s)
- Jun Li
- Department of Ophthalmology, Shanghai First People’s Hospital Affiliated Shanghai Jiao Tong University, Shanghai, PR China
| | - Peipei Wang
- Department of Ophthalmology, Lishui City Center Hospital, Zhejiang Province, PR China
| | - Songping Yu
- Department of Ophthalmology, Lishui City Center Hospital, Zhejiang Province, PR China
| | - Zhi Zheng
- Department of Ophthalmology, Shanghai First People’s Hospital Affiliated Shanghai Jiao Tong University, Shanghai, PR China
| | - Xun Xu
- Department of Ophthalmology, Shanghai First People’s Hospital Affiliated Shanghai Jiao Tong University, Shanghai, PR China
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Oxidative processing of latent Fas in the endoplasmic reticulum controls the strength of apoptosis. Mol Cell Biol 2012; 32:3464-78. [PMID: 22751926 DOI: 10.1128/mcb.00125-12] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We recently demonstrated that S-glutathionylation of the death receptor Fas (Fas-SSG) amplifies apoptosis (V. Anathy et al., J. Cell Biol. 184:241-252, 2009). In the present study, we demonstrate that distinct pools of Fas exist in cells. Upon ligation of surface Fas, a separate pool of latent Fas in the endoplasmic reticulum (ER) underwent rapid oxidative processing characterized by the loss of free sulfhydryl content (Fas-SH) and resultant increases in S-glutathionylation of Cys294, leading to increases of surface Fas. Stimulation with FasL rapidly induced associations of Fas with ERp57 and glutathione S-transferase π (GSTP), a protein disulfide isomerase and catalyst of S-glutathionylation, respectively, in the ER. Knockdown or inhibition of ERp57 and GSTP1 substantially decreased FasL-induced oxidative processing and S-glutathionylation of Fas, resulting in decreased death-inducing signaling complex formation and caspase activity and enhanced survival. Bleomycin-induced pulmonary fibrosis was accompanied by increased interactions between Fas-ERp57-GSTP1 and S-glutathionylation of Fas. Importantly, fibrosis was largely prevented following short interfering RNA-mediated ablation of ERp57 and GSTP. Collectively, these findings illuminate a regulatory switch, a ligand-initiated oxidative processing of latent Fas, that controls the strength of apoptosis.
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Jeschke MG, Boehning D. Endoplasmic reticulum stress and insulin resistance post-trauma: similarities to type 2 diabetes. J Cell Mol Med 2012; 16:437-44. [PMID: 21812914 PMCID: PMC3217064 DOI: 10.1111/j.1582-4934.2011.01405.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Type 2 diabetes, a rapidly growing disease of modern aetiology, has a profound impact on morbidity and mortality. Explosions in the understanding of the underlying cellular mechanisms which lead to type 2 diabetes have recently been elucidated. In particular, the central role of endoplasmic reticulum stress (ER stress) and the unfolding protein response (UPR) in insulin resistance in type 2 diabetes has recently been discovered. We hypothesize that ER stress and UPR are not only central for type 2 diabetes but also for stress-induced diabetes. We review here the evidence that post-burn insulin resistance and hyperglycaemia have pathophysiologic mechanisms in common with type 2 diabetes. These recent discoveries not only highlight the importance of ER stress in the post-burn patient recovery, but furthermore enable new models to study fundamental and interventional aspects of type 2 diabetes.
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Affiliation(s)
- Marc G Jeschke
- Ross Tilley Burn Center, Sunnybrook Health Science Centre and University of Toronto, ON, Canada.
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Raturi A, Simmen T. Where the endoplasmic reticulum and the mitochondrion tie the knot: the mitochondria-associated membrane (MAM). BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2012; 1833:213-24. [PMID: 22575682 DOI: 10.1016/j.bbamcr.2012.04.013] [Citation(s) in RCA: 343] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Revised: 04/12/2012] [Accepted: 04/25/2012] [Indexed: 01/01/2023]
Abstract
More than a billion years ago, bacterial precursors of mitochondria became endosymbionts in what we call eukaryotic cells today. The true significance of the word "endosymbiont" has only become clear to cell biologists with the discovery that the endoplasmic reticulum (ER) superorganelle dedicates a special domain for the metabolic interaction with mitochondria. This domain, identified in all eukaryotic cell systems from yeast to man and called the mitochondria-associated membrane (MAM), has a distinct proteome, specific tethers on the cytosolic face and regulatory proteins in the ER lumen of the ER. The MAM has distinct biochemical properties and appears as ER tubules closely apposed to mitochondria on electron micrographs. The functions of the MAM range from lipid metabolism and calcium signaling to inflammasome formation. Consistent with these functions, the MAM is enriched in lipid metabolism enzymes and calcium handling proteins. During cellular stress situations, like an altered cellular redox state, the MAM alters its set of regulatory proteins and thus alters MAM functions. Notably, this set prominently comprises ER chaperones and oxidoreductases that connect protein synthesis and folding inside the ER to mitochondrial metabolism. Moreover, ER membranes associated with mitochondria also accommodate parts of the machinery that determines mitochondrial membrane dynamics and connect mitochondria to the cytoskeleton. Together, these exciting findings demonstrate that the physiological interactions between the ER and mitochondria are so bilateral that we are tempted to compare their relationship to the one of a married couple: distinct, but inseparable and certainly dependent on each other. In this paradigm, the MAM stands for the intracellular location where the two organelles tie the knot. Resembling "real life", the happy marriage between the two organelles prevents the onset of diseases that are characterized by disrupted metabolism and decreased lifespan, including neurodegeneration and cancer. This article is part of a Special Issue entitled: Mitochondrial dynamics and physiology.
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Affiliation(s)
- Arun Raturi
- Department of Cell Biology, University of Alberta, Edmonton, Alberta, Canada
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Skommer J, Brittain T. Extended survival of SH-SY5Y cells following overexpression of Lys67Glu neuroglobin is associated with stabilization of ΔψM. Cytometry A 2012; 81:602-10. [PMID: 22467552 DOI: 10.1002/cyto.a.22046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Revised: 03/01/2012] [Accepted: 03/06/2012] [Indexed: 01/03/2023]
Abstract
Overwhelming evidence indicates that a high level of expression of the protein neuroglobin protects neurons in vitro, in animal models, and in humans, against cell death associated with hypoxic and amyloid insult. We have previously showed that neuroglobin protects neuronal cells from the mitochondrial pathway of apoptosis induced by the BH3 mimetic, by preventing cytochrome c-triggered activation of caspase 9. Here, using cell and molecular biology approaches, we generated a particular neuroglobin mutant, Lys67Glu, overexpression of which confers a significant protection from the BH3 mimetic (TW-37)-induced apoptosis in human neuroblastoma SH-SY5Y cells. The cumulative inhibition of caspase 9 activation is significantly enhanced in Lys67Glu neuroglobin-expressing cells, as compared to wild-type neuroglobin expressing cells. A multiparameter flow cytometry analysis of TW-37-treated cells revealed that inhibition of caspase 9 activity by Lys67Glu neuroglobin is associated with the preservation of the mitochondrial transmembrane potential (Δψ(M) ), as well as a decreased rate of cytochrome crelease from the mitochondria.
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Affiliation(s)
- Joanna Skommer
- School of Biological Sciences, University of Auckland, 3a Symonds Street, Auckland, New Zealand.
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Song J, Zhang XJ, Boehning D, Brooks NC, Herndon DN, Jeschke MG. Measurement of hepatic protein fractional synthetic rate with stable isotope labeling technique in thapsigargin stressed HepG2 cells. Int J Biol Sci 2012; 8:265-71. [PMID: 22298954 PMCID: PMC3269609 DOI: 10.7150/ijbs.3660] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Accepted: 01/10/2012] [Indexed: 02/02/2023] Open
Abstract
Severe burn-induced liver damage and dysfunction is associated with endoplasmic reticulum (ER) stress. ER stress has been shown to regulate global protein synthesis. In the current study, we induced ER stress in vitro and estimated the effect of ER stress on hepatic protein synthesis. The aim was two-fold: (1) to establish an in vitro model to isotopically measure hepatic protein synthesis and (2) to evaluate protein fractional synthetic rate (FSR) in response to ER stress. Human hepatocellular carcinoma cells (HepG2) were cultured in medium supplemented with stable isotopes 1,2-13C2-glycine and L-[ring-13C6]phenylalanine. ER stress was induced by exposing the cells to 100 nM of thapsigargin (TG). Cell content was collected from day 0 to 14. Alterations in cytosolic calcium were measured by calcium imaging and ER stress markers were confirmed by Western blotting. The precursor and product enrichments were detected by GC-MS analysis for FSR calculation. We found that the hepatic protein FSR were 0.97±0.02 and 0.99±0.05%/hr calculated from 1,2-13C2-glycine and L-[ring-13C6]phenylalanine, respectively. TG depleted ER calcium stores and induced ER stress by upregulating p-IRE-1 and Bip. FSR dramatically decreased to 0.68±0.03 and 0.60±0.06%/hr in the TG treatment group (p<0.05, vs. control). TG-induced ER stress inhibited hepatic protein synthesis. The stable isotope tracer incorporation technique is a useful method for studying the effects of ER stress on hepatic protein synthesis.
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Affiliation(s)
- Juquan Song
- Department of Surgery, University of Texas Health Science Center, San Antonio, Texas 78299, USA.
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CD95 triggers Orai1-mediated localized Ca2+ entry, regulates recruitment of protein kinase C (PKC) β2, and prevents death-inducing signaling complex formation. Proc Natl Acad Sci U S A 2011; 108:19072-7. [PMID: 22065776 DOI: 10.1073/pnas.1116946108] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The death receptor CD95 plays a pivotal role in immune surveillance and immune tolerance. Binding of CD95L to CD95 leads to recruitment of the adaptor protein Fas-associated death domain protein (FADD), which in turn aggregates caspase-8 and caspase-10. Efficient formation of the CD95/FADD/caspase complex, known as the death-inducing signaling complex (DISC), culminates in the induction of apoptosis. We show that cells exposed to CD95L undergo a reorganization of the plasma membrane in which the Ca(2+) release-activated Ca(2+) channel Orai1 and the endoplasmic reticulum-resident activator stromal interaction molecule 1 colocalize with CD95 into a micrometer-sized cluster in which the channel elicits a polarized entry of calcium. Orai1 knockdown and expression of a dominant negative construct (Orai1E106A) reveal that on CD95 engagement, the Orai1-driven localized Ca(2+) influx is fundamental to recruiting the Ca(2+)-dependent protein kinase C (PKC) β2 to the DISC. PKCβ2 in turn transiently holds the complex in an inactive status, preventing caspase activation and transmission of the apoptotic signal. This study identifies a biological role of Ca(2+) and the Orai1 channel that drives a transient negative feedback loop, introducing a lag phase in the early steps of the CD95 signal. We suggest that these localized events provide a time of decision to prevent accidental cell death.
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