1
|
Sapienza S, Tedeschi V, Apicella B, Pannaccione A, Russo C, Sisalli MJ, Magliocca G, Loffredo S, Secondo A. Ultrafine particulate matter pollution and dysfunction of endoplasmic reticulum Ca 2+ store: A pathomechanism shared with amyotrophic lateral sclerosis motor neurons? ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 273:116104. [PMID: 38377779 DOI: 10.1016/j.ecoenv.2024.116104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 01/29/2024] [Accepted: 02/09/2024] [Indexed: 02/22/2024]
Abstract
Increased risk of neurodegenerative diseases has been envisaged for air pollution exposure. On the other hand, environmental risk factors, including air pollution, have been suggested for Amyotrophic Lateral Sclerosis (ALS) pathomechanism. Therefore, the neurotoxicity of ultrafine particulate matter (PM0.1) (PM < 0.1 μm size) and its sub-20 nm nanoparticle fraction (NP20) has been investigated in motor neuronal-like cells and primary cortical neurons, mainly affected in ALS. The present data showed that PM0.1 and NP20 exposure induced endoplasmic reticulum (ER) stress, as occurred in cortex and spinal cord of ALS mice carrying G93A mutation in SOD1 gene. Furthermore, NSC-34 motor neuronal-like cells exposed to PM0.1 and NP20 shared the same proteomic profile on some apoptotic factors with motor neurons treated with the L-BMAA, a neurotoxin inducing Amyotrophic Lateral Sclerosis/Parkinson-Dementia Complex (ALS/PDC). Of note ER stress induced by PM0.1 and NP20 in motor neurons was associated to pathological changes in ER morphology and dramatic reduction of organellar Ca2+ level through the dysregulation of the Ca2+-pumps SERCA2 and SERCA3, the Ca2+-sensor STIM1, and the Ca2+-release channels RyR3 and IP3R3. Furthermore, the mechanism deputed to ER Ca2+ refilling (e.g. the so called store operated calcium entry-SOCE) and the relative currents ICRAC were also altered by PM0.1 and NP20 exposure. Additionally, these carbonaceous particles caused the exacerbation of L-BMAA-induced ER stress and Caspase-9 activation. In conclusion, this study shows that PM0.1 and NP20 induced the aberrant expression of ER proteins leading to dysmorphic ER, organellar Ca2+ dysfunction, ER stress and neurotoxicity, providing putative correlations with the neurodegenerative process occurring in ALS.
Collapse
Affiliation(s)
- Silvia Sapienza
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples 80131, Italy
| | - Valentina Tedeschi
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples 80131, Italy
| | - Barbara Apicella
- Istituto di Scienze e Tecnologie per l'Energia e la Mobilità Sostenibili (STEMS)-CNR, Naples 80125, Italy
| | - Anna Pannaccione
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples 80131, Italy
| | - Carmela Russo
- Istituto di Scienze e Tecnologie per l'Energia e la Mobilità Sostenibili (STEMS)-CNR, Naples 80125, Italy
| | - Maria Josè Sisalli
- Department of Translational Medical Sciences, University of Naples Federico II, Naples 80131, Italy
| | - Giorgia Magliocca
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples 80131, Italy
| | - Stefania Loffredo
- Department of Translational Medical Sciences, University of Naples Federico II, Naples 80131, Italy; Center for Basic and Clinical Immunology Research (CISI), University of Naples Federico II, WAO Center of Excellence, Naples 80131, Italy
| | - Agnese Secondo
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples 80131, Italy.
| |
Collapse
|
2
|
Piccialli I, Greco F, Roviello G, Sisalli MJ, Tedeschi V, di Mola A, Borbone N, Oliviero G, De Feo V, Secondo A, Massa A, Pannaccione A. The 3-(3-oxoisoindolin-1-yl)pentane-2,4-dione (ISOAC1) as a new molecule able to inhibit Amyloid β aggregation and neurotoxicity. Biomed Pharmacother 2023; 168:115745. [PMID: 37871561 DOI: 10.1016/j.biopha.2023.115745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/12/2023] [Accepted: 10/16/2023] [Indexed: 10/25/2023] Open
Abstract
Amyloid β 1-42 (Aβ1-42) protein aggregation is considered one of the main triggers of Alzheimer's disease (AD). In this study, we examined the in vitro anti-amyloidogenic activity of the isoindolinone derivative 3-(3-oxoisoindolin-1-yl)pentane-2,4-dione (ISOAC1) and its neuroprotective potential against the Aβ1-42 toxicity. By performing the Thioflavin T fluorescence assay, Western blotting analyses, and Circular Dichroism experiments, we found that ISOAC1 was able to reduce the Aβ1-42 aggregation and conformational transition towards β-sheet structures. Interestingly, in silico studies revealed that ISOAC1 was able to bind to both the monomer and a pentameric protofibril of Aβ1-42, establishing a hydrophobic interaction with the PHE19 residue of the Aβ1-42 KLVFF motif. In vitro analyses on primary cortical neurons showed that ISOAC1 counteracted the increase of intracellular Ca2+ levels and decreased the Aβ1-42-induced toxicity, in terms of mitochondrial activity reduction and increase of reactive oxygen species production. In addition, confocal microscopy analyses showed that ISOAC1 was able to reduce the Aβ1-42 intraneuronal accumulation. Collectively, our results clearly show that ISOAC1 exerts a neuroprotective effect by reducing the Aβ1-42 aggregation and toxicity, hence emerging as a promising compound for the development of new Aβ-targeting therapeutic strategies for AD treatment.
Collapse
Affiliation(s)
- Ilaria Piccialli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Francesca Greco
- Department of Pharmacy, Federico II University of Naples, Naples, Italy
| | - Giovanni Roviello
- Institute of Biostructures and Bioimaging, Italian National Council for Research (IBB-CNR), Naples, Italy
| | - Maria Josè Sisalli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Valentina Tedeschi
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Antonia di Mola
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, Fisciano, SA, Italy
| | - Nicola Borbone
- Department of Pharmacy, Federico II University of Naples, Naples, Italy
| | - Giorgia Oliviero
- Department of Molecular Medicine and Medical Biotechnologies, Federico II University of Naples, Naples, Italy
| | - Vincenzo De Feo
- Department of Pharmacy, University of Salerno, Fisciano, SA, Italy
| | - Agnese Secondo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Antonio Massa
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, Fisciano, SA, Italy.
| | - Anna Pannaccione
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Naples, Italy.
| |
Collapse
|
3
|
Tedeschi V, Vinciguerra A, Sisalli MJ, Pignataro G, Secondo A. Pharmacological inhibition of lysosomal two-pore channel 2 (TPC2) confers neuroprotection in stroke via autophagy regulation. Neurobiol Dis 2023; 178:106020. [PMID: 36708960 DOI: 10.1016/j.nbd.2023.106020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 12/29/2022] [Accepted: 01/24/2023] [Indexed: 01/27/2023] Open
Abstract
Lysosomal function and organellar Ca2+ homeostasis become dysfunctional in Stroke causing disturbances in autophagy, the major process for the degradation of abnormal protein aggregates and dysfunctional organelles. However, the role of autophagy in Stroke is controversial since excessive or prolonged autophagy activation exacerbates ischemic brain injury. Of note, glutamate evokes NAADP-dependent Ca2+ release via lysosomal TPC2 channels thus controlling basal autophagy. Considering the massive release of excitotoxins in Stroke, autophagic flux becomes uncontrolled with abnormal formation of autophagosomes causing, in turn, disruption of excitotoxins clearance and neurodegeneration. Here, a fine regulation of autophagy via a proper pharmacological modulation of lysosomal TPC2 channel has been tested in preclinical Stroke models. Primary cortical neurons were subjected to oxygen and glucose deprivation+reoxygenation to reproduce in vitro brain ischemia. Focal brain ischemia was induced in rats by transient middle cerebral artery occlusion (tMCAO). Under these conditions, TPC2 protein expression as well as autophagy and endoplasmic reticulum (ER) stress markers were studied by Western blotting, while TPC2 localization and activity were measured by immunocytochemistry and single-cell video-imaging, respectively. TPC2 protein expression and immunosignal were highly modulated in primary cortical neurons exposed to extreme hypoxic conditions causing dysfunction in organellar Ca2+ homeostasis, ER stress and autophagy-induced cell death. TPC2 knocking down and pharmacological inhibition by Ned-19 during hypoxia induced neuroprotection. The effect of Ned-19 was reversed by the permeable form of TPC2 endogenous agonist, NAADP-AM. Of note, Ned-19 prevented ER stress, as measured by GRP78 (78 kDa glucose-regulated protein) protein reduction and caspase 9 downregulation. In this way Ned-19 restored organellar Ca2+ level. Interestingly, Ned-19 reduced the infarct volume and neurological deficits in rats subjected to tMCAO and prevented hypoxia-induced cell death by blocking autophagic flux. Collectively, the pharmacological inhibition of TPC2 lysosomal channel by Ned-19 protects from focal ischemia by hampering a hyperfunctional autophagy.
Collapse
Affiliation(s)
- Valentina Tedeschi
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy.
| | - Antonio Vinciguerra
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Via Tronto 10/A, Ancona 60126, Italy.
| | - Maria Josè Sisalli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy.
| | - Giuseppe Pignataro
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy.
| | - Agnese Secondo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy.
| |
Collapse
|
4
|
Cerium-Doped Self-Assembling Nanoparticles as a Novel Anti-Oxidant Delivery System Preserving Mitochondrial Function in Cortical Neurons Exposed to Ischemia-like Conditions. Antioxidants (Basel) 2023; 12:antiox12020358. [PMID: 36829918 PMCID: PMC9952397 DOI: 10.3390/antiox12020358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/26/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023] Open
Abstract
Neurodegenerative diseases are characterized by mitochondrial dysfunction leading to abnormal levels of reactive oxygen species (ROS), making the use of ROS-scavenging nanomaterials a promising therapeutic approach. Here, we combined the unique ROS-scavenging properties of cerium-based nanomaterials with the lipid self-assembling nanoparticles (SANP) technology. We optimized the preparation of cerium-doped SANP (Ce-SANP) and characterized the formulations in terms of both physiochemical and biological properties. Ce-SANP exhibited good colloidal properties and were able to mimic the activity of two ROS-scavenging enzymes, namely peroxidase and super oxide dismutase. Under ischemia-like conditions, Ce-SANP could rescue neuronal cells from mitochondrial suffering by reducing ROS production and preventing ATP level reduction. Furthermore, Ce-SANP prevented mitochondrial Ca2+ homeostasis dysfunction, partially restoring mitochondrial Ca2+ handling. Taken together, these results highlight the potential of the anti-oxidant Ce-SANP platform technology to manage ROS levels and mitochondrial function for the treatment of neurodegenerative diseases.
Collapse
|
5
|
Sisalli MJ, Della Notte S, Secondo A, Ventra C, Annunziato L, Scorziello A. L-Ornithine L-Aspartate Restores Mitochondrial Function and Modulates Intracellular Calcium Homeostasis in Parkinson's Disease Models. Cells 2022; 11:cells11182909. [PMID: 36139485 PMCID: PMC9496730 DOI: 10.3390/cells11182909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 11/18/2022] Open
Abstract
The altered crosstalk between mitochondrial dysfunction, intracellular Ca2+ homeostasis, and oxidative stress has a central role in the dopaminergic neurodegeneration. In the present study, we investigated the hypothesis that pharmacological strategies able to improve mitochondrial functions might prevent neuronal dysfunction in in vitro models of Parkinson’s disease. To this aim, the attention was focused on the amino acid ornithine due to its ability to cross the blood–brain barrier, to selectively reach and penetrate the mitochondria through the ornithine transporter 1, and to control mitochondrial function. To pursue this issue, experiments were performed in human neuroblastoma cells SH-SY5Y treated with rotenone and 6-hydroxydopamine to investigate the pharmacological profile of the compound L-Ornithine-L-Aspartate (LOLA) as a new potential therapeutic strategy to prevent dopaminergic neurons’ death. In these models, confocal microscopy experiments with fluorescent dyes measuring mitochondrial calcium content, mitochondrial membrane potential, and mitochondrial ROS production, demonstrated that LOLA improved mitochondrial functions. Moreover, by increasing NCXs expression and activity, LOLA also reduced cytosolic [Ca2+] thanks to its ability to modulate NO production. Collectively, these results indicate that LOLA, by interfering with those mitochondrial mechanisms related to ROS and RNS production, promotes mitochondrial functional recovery, thus confirming the tight relationship existing between cytosolic ionic homeostasis and cellular metabolism depending on the type of insult applied.
Collapse
Affiliation(s)
- Maria Josè Sisalli
- Division of Pharmacology, Department of Neuroscience, School of Medicine, University of Naples “Federico II”, 80131 Naples, Italy
| | - Salvatore Della Notte
- Division of Pharmacology, Department of Neuroscience, School of Medicine, University of Naples “Federico II”, 80131 Naples, Italy
| | - Agnese Secondo
- Division of Pharmacology, Department of Neuroscience, School of Medicine, University of Naples “Federico II”, 80131 Naples, Italy
| | | | | | - Antonella Scorziello
- Division of Pharmacology, Department of Neuroscience, School of Medicine, University of Naples “Federico II”, 80131 Naples, Italy
- Correspondence:
| |
Collapse
|
6
|
Santiago-Castañeda C, Huerta de la Cruz S, Martínez-Aguirre C, Orozco-Suárez SA, Rocha L. Cannabidiol Reduces Short- and Long-Term High Glutamate Release after Severe Traumatic Brain Injury and Improves Functional Recovery. Pharmaceutics 2022; 14:pharmaceutics14081609. [PMID: 36015236 PMCID: PMC9414526 DOI: 10.3390/pharmaceutics14081609] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/16/2022] [Accepted: 07/29/2022] [Indexed: 12/04/2022] Open
Abstract
This study aimed to determine if orally administered cannabidiol (CBD) lessens the cortical over-release of glutamate induced by a severe traumatic brain injury (TBI) and facilitates functional recovery. The short-term experiment focused on identifying the optimal oral pretreatment of CBD. Male Wistar rats were pretreated with oral administration of CBD (50, 100, or 200 mg/kg) daily for 7 days. Then, extracellular glutamate concentration was estimated by cortical microdialysis before and immediately after a severe TBI. The long-term experiment focused on evaluating the effect of the optimal treatment of CBD (pre- vs. pre- and post-TBI) 30 days after trauma. Sensorimotor function, body weight, and mortality rate were evaluated. In the short term, TBI induced a high release of glutamate (738% ± 173%; p < 0.001 vs. basal). Oral pretreatment with CBD at all doses tested reduced glutamate concentration but with higher potency at when animals received 100 mg/kg (222 ± 33%, p < 0.01 vs. TBI), an effect associated with a lower mortality rate (22%, p < 0.001 vs. TBI). In the long-term experiment, the TBI group showed a high glutamate concentration (149% p < 0.01 vs. SHAM). In contrast, animals receiving the optimal treatment of CBD (pre- and pre/post-TBI) showed glutamate concentrations like the SHAM group (p > 0.05). This effect was associated with high sensorimotor function improvement. CBD pretreatment, but not pre-/post-treatment, induced a higher body weight gain (39% ± 2.7%, p < 0.01 vs. TBI) and lower mortality rate (22%, p < 0.01 vs. TBI). These results support that orally administered CBD reduces short- and long-term TBI-induced excitotoxicity and facilitated functional recovery. Indeed, pretreatment with CBD was sufficient to lessen the adverse sequelae of TBI.
Collapse
Affiliation(s)
- Cindy Santiago-Castañeda
- Department of Pharmacobiology, Center for Research and Advanced Studies (CINVESTAV), Mexico City 14330, Mexico; (C.S.-C.); (S.H.d.l.C.); (C.M.-A.)
| | - Saúl Huerta de la Cruz
- Department of Pharmacobiology, Center for Research and Advanced Studies (CINVESTAV), Mexico City 14330, Mexico; (C.S.-C.); (S.H.d.l.C.); (C.M.-A.)
| | - Christopher Martínez-Aguirre
- Department of Pharmacobiology, Center for Research and Advanced Studies (CINVESTAV), Mexico City 14330, Mexico; (C.S.-C.); (S.H.d.l.C.); (C.M.-A.)
| | - Sandra Adela Orozco-Suárez
- Unit for Medical Research in Neurological Diseases, Specialties Hospital, National Medical Center SXXI (CMN-SXXI), Mexico City 06720, Mexico;
| | - Luisa Rocha
- Department of Pharmacobiology, Center for Research and Advanced Studies (CINVESTAV), Mexico City 14330, Mexico; (C.S.-C.); (S.H.d.l.C.); (C.M.-A.)
- Correspondence: ; Tel.: +52-55-5483-2800
| |
Collapse
|
7
|
Petrozziello T, Boscia F, Tedeschi V, Pannaccione A, de Rosa V, Corvino A, Severino B, Annunziato L, Secondo A. Na +/Ca 2+ exchanger isoform 1 takes part to the Ca 2+-related prosurvival pathway of SOD1 in primary motor neurons exposed to beta-methylamino-L-alanine. Cell Commun Signal 2022; 20:8. [PMID: 35022040 PMCID: PMC8756626 DOI: 10.1186/s12964-021-00813-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 12/02/2021] [Indexed: 11/10/2022] Open
Abstract
Background The cycad neurotoxin beta-methylamino-l-alanine (L-BMAA), one of the environmental trigger factor for amyotrophic lateral sclerosis/Parkinson-dementia complex (ALS/PDC), may cause neurodegeneration by disrupting organellar Ca2+ homeostasis. Through the activation of Akt/ERK1/2 pathway, the Cu,Zn-superoxide dismutase (SOD1) and its non-metallated form, ApoSOD1, prevent endoplasmic reticulum (ER) stress-induced cell death in motor neurons exposed to L-BMAA. This occurs through the rapid increase of intracellular Ca2+ concentration ([Ca2+]i) in part flowing from the extracellular compartment and in part released from ER. However, the molecular components of this mechanism remain uncharacterized. Methods By an integrated approach consisting on the use of siRNA strategy, Western blotting, confocal double- labeling immunofluorescence, patch-clamp electrophysiology, and Fura 2-/SBFI-single-cell imaging, we explored in rat motor neuron-enriched cultures the involvement of the plasma membrane proteins Na+/Ca2+ exchanger (NCX) and purinergic P2X7 receptor as well as that of the intracellular cADP-ribose (cADPR) pathway, in the neuroprotective mechanism of SOD1. Results We showed that SOD1-induced [Ca2+]i rise was prevented neither by A430879, a P2X7 receptor specific antagonist or 8-bromo-cADPR, a cell permeant antagonist of cADP-ribose, but only by the pan inhibitor of NCX, CB-DMB. The same occurred for the ApoSOD1. Confocal double labeling immunofluorescence showed a huge expression of plasmalemmal NCX1 and intracellular NCX3 isoforms. Furthermore, we identified NCX1 reverse mode as the main mechanism responsible for the neuroprotective ER Ca2+ refilling elicited by SOD1 and ApoSOD1 through which they promoted translocation of active Akt in the nuclei of a subset of primary motor neurons. Finally, the activation of NCX1 by the specific agonist CN-PYB2 protected motor neurons from L-BMAA-induced cell death, mimicking the effect of SOD1. Conclusion Collectively, our data indicate that SOD1 and ApoSOD1 exert their neuroprotective effect by modulating ER Ca2+ content through the activation of NCX1 reverse mode and Akt nuclear translocation in a subset of primary motor neurons. Video Abstract
Supplementary Information The online version contains supplementary material available at 10.1186/s12964-021-00813-z.
Collapse
Affiliation(s)
- Tiziana Petrozziello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Francesca Boscia
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Valentina Tedeschi
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Anna Pannaccione
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Valeria de Rosa
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Angela Corvino
- Department of Pharmacy, School of Medicine, "Federico II" University of Naples, Via D. Montesano 49, 80131, Naples, Italy
| | - Beatrice Severino
- Department of Pharmacy, School of Medicine, "Federico II" University of Naples, Via D. Montesano 49, 80131, Naples, Italy
| | | | - Agnese Secondo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy.
| |
Collapse
|
8
|
Tedeschi V, Sisalli MJ, Pannaccione A, Piccialli I, Molinaro P, Annunziato L, Secondo A. Na +/Ca 2+ exchanger isoform 1 (NCX1) and canonical transient receptor potential channel 6 (TRPC6) are recruited by STIM1 to mediate Store-Operated Calcium Entry in primary cortical neurons. Cell Calcium 2022; 101:102525. [PMID: 34995919 DOI: 10.1016/j.ceca.2021.102525] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 11/05/2021] [Accepted: 12/26/2021] [Indexed: 02/01/2023]
Abstract
Excessive calcium (Ca2+) release from the endoplasmic reticulum (ER) represents an important hallmark of several neurodegenerative diseases. ER is recharged from Ca2+ through the so-called Store-Operated Calcium Entry (SOCE) thus providing Ca2+ signals to regulate critical cell functions. Single transmembrane-spanning domain protein stromal interacting molecule 1 (STIM1), mainly residing in the ER, and plasmalemmal channel Orai1 represent the SOCE key components at neuronal level. However, many other proteins participate to ER Ca2+ refilling including the Na+/Ca2+ exchanger isoform 1 (NCX1), whose regulation by ER remains unknown. In this study, we tested the possibility that neuronal NCX1 may take part to SOCE through the interaction with STIM1. In rat primary cortical neurons and in nerve growth factor (NGF)-differentiated PC12 cells NCX1 knocking down by siRNA strategy significantly prevented SOCE as well as SOCE pharmacological inhibition by SKF-96365 and 2-APB. A significant reduction of SOCE was recorded also in synaptosomes from ncx1-/- mice brain compared with ncx1+/+ mice. Double labeling confocal experiments showed a large co-localization between NCX1 and STIM1 in rat primary cortical neurons. Accordingly, NCX1 and STIM1 co-immunoprecipitated and functionally interacted each other during ischemic preconditioning, a phenomenon inducing ischemic tolerance. However, STIM1 knocking down reduced NCX1 activity recorded by either patch-clamp electrophysiology or Fura-2 single-cell microfluorimetry. Furthermore, canonical transient receptor potential channel 6 (TRPC6) was identified as the mechanism mediating local increase of sodium (Na+) useful to drive NCX1 reverse mode and, therefore, NCX1-mediated Ca2+ refilling. In fact, TRPC6 not only interacted with STIM1, as shown by the co-localization and co-immunoprecipitation with the ER Ca2+ sensor, but it also mediated 1,3-Benzenedicarboxylic acid, 4,4'-[1,4,10-trioxa-7,13-diazacyclopentadecane-7,13-diylbis(5-methoxy-6,12-benzofurandiyl)]bis-, tetrakis[(acetyloxy)methyl] ester (SBFI)-monitored Na+ increase elicited by thapsigargin in primary cortical neurons. Accordingly, efficient TRPC6 knockdown prevented thapsigargin-induced intracellular Na+ elevation and SOCE. Collectively, we identify NCX1 as a new partner of STIM1 in mediating SOCE, whose activation in the reverse mode may be facilitated by the local increase of Na+ concentration due to the interaction between STIM1 and TRPC6 in primary cortical neurons.
Collapse
Affiliation(s)
- Valentina Tedeschi
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Maria Josè Sisalli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Anna Pannaccione
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Ilaria Piccialli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Pasquale Molinaro
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | | | - Agnese Secondo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via S. Pansini 5, 80131, Naples, Italy.
| |
Collapse
|
9
|
Identification and characterization of the promoter and transcription factors regulating the expression of cerebral sodium/calcium exchanger 2 (NCX2) gene. Cell Calcium 2022; 102:102542. [DOI: 10.1016/j.ceca.2022.102542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/30/2021] [Accepted: 01/22/2022] [Indexed: 11/22/2022]
|
10
|
Magli E, Fattorusso C, Persico M, Corvino A, Esposito G, Fiorino F, Luciano P, Perissutti E, Santagada V, Severino B, Tedeschi V, Pannaccione A, Pignataro G, Caliendo G, Annunziato L, Secondo A, Frecentese F. New Insights into the Structure-Activity Relationship and Neuroprotective Profile of Benzodiazepinone Derivatives of Neurounina-1 as Modulators of the Na +/Ca 2+ Exchanger Isoforms. J Med Chem 2021; 64:17901-17919. [PMID: 34845907 PMCID: PMC8713167 DOI: 10.1021/acs.jmedchem.1c01212] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Due to the neuroprotective role of the Na+/Ca2+ exchanger (NCX) isoforms NCX1 and NCX3, we synthesized novel benzodiazepinone derivatives of the unique NCX activator Neurounina-1, named compounds 1-19. The derivatives are characterized by a benzodiazepinonic nucleus linked to five- or six-membered cyclic amines via a methylene, ethylene, or acetyl spacer. The compounds have been screened on NCX1/NCX3 isoform activities by a high-throughput screening approach, and the most promising were characterized by patch-clamp electrophysiology and Fura-2AM video imaging. We identified two novel modulators of NCX: compound 4, inhibiting NCX1 reverse mode, and compound 14, enhancing NCX1 and NCX3 activity. Compound 1 displayed neuroprotection in two preclinical models of brain ischemia. The analysis of the conformational and steric features led to the identification of the molecular volume required for selective NCX1 activation for mixed NCX1/NCX3 activation or for NCX1 inhibition, providing the first prototypal model for the design of optimized isoform modulators.
Collapse
Affiliation(s)
- Elisa Magli
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Caterina Fattorusso
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Marco Persico
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Angela Corvino
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Gianluca Esposito
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Ferdinando Fiorino
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Paolo Luciano
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Elisa Perissutti
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Vincenzo Santagada
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Beatrice Severino
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | - Valentina Tedeschi
- Department of Neuroscience, Division of Pharmacology, University of Naples "Federico II", via Pansini 5, 80131 Naples, Italy
| | - Anna Pannaccione
- Department of Neuroscience, Division of Pharmacology, University of Naples "Federico II", via Pansini 5, 80131 Naples, Italy
| | - Giuseppe Pignataro
- Department of Neuroscience, Division of Pharmacology, University of Naples "Federico II", via Pansini 5, 80131 Naples, Italy
| | - Giuseppe Caliendo
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| | | | - Agnese Secondo
- Department of Neuroscience, Division of Pharmacology, University of Naples "Federico II", via Pansini 5, 80131 Naples, Italy
| | - Francesco Frecentese
- Department of Pharmacy, University of Naples "Federico II", Via D. Montesano 49, 80131 Naples, Italy
| |
Collapse
|
11
|
Cammarota M, de Rosa V, Pannaccione A, Secondo A, Tedeschi V, Piccialli I, Fiorino F, Severino B, Annunziato L, Boscia F. Rebound effects of NCX3 pharmacological inhibition: A novel strategy to accelerate myelin formation in oligodendrocytes. Biomed Pharmacother 2021; 143:112111. [PMID: 34481380 DOI: 10.1016/j.biopha.2021.112111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 08/20/2021] [Accepted: 08/23/2021] [Indexed: 11/18/2022] Open
Abstract
The Na+/Ca2+ exchanger NCX3 is an important regulator of sodium and calcium homeostasis in oligodendrocyte lineage. To date, no information is available on the effects resulting from prolonged exposure to NCX3 blockers and subsequent drug washout in oligodendroglia. Here, we investigated, by means of biochemical, morphological and functional analyses, the pharmacological effects of the NCX3 inhibitor, the 5-amino-N-butyl-2-(4-ethoxyphenoxy)-benzamide hydrochloride (BED), on NCXs expression and activity, as well as intracellular [Na+]i and [Ca2+]i levels, during treatment and following drug washout both in human MO3.13 oligodendrocytes and rat primary oligodendrocyte precursor cells (OPCs). BED exposure antagonized NCX activity, induced OPCs proliferation and [Na+]i accumulation. By contrast, 2 days of BED washout after 4 days of treatment significantly upregulated low molecular weight NCX3 proteins, reversed NCX activity, and increased intracellular [Ca2+]i. This BED-free effect was accompanied by an upregulation of NCX3 expression in oligodendrocyte processes and accelerated expression of myelin markers in rat primary oligodendrocytes. Collectively, our findings show that the pharmacological inhibition of the NCX3 exchanger with BED blocker maybe followed by a rebound increase in NCX3 expression and reversal activity that accelerate myelin sheet formation in oligodendrocytes. In addition, they indicate that a particular attention should be paid to the use of NCX inhibitors for possible rebound effects, and suggest that further studies will be necessary to investigate whether selective pharmacological modulation of NCX3 exchanger may be exploited to benefit demyelination and remyelination in demyelinating diseases.
Collapse
Affiliation(s)
- Mariarosaria Cammarota
- Division of Pharmacology, Department of Neuroscience, Reproductive Sciences and Dentistry, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Valeria de Rosa
- Division of Pharmacology, Department of Neuroscience, Reproductive Sciences and Dentistry, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Anna Pannaccione
- Division of Pharmacology, Department of Neuroscience, Reproductive Sciences and Dentistry, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Agnese Secondo
- Division of Pharmacology, Department of Neuroscience, Reproductive Sciences and Dentistry, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Valentina Tedeschi
- Division of Pharmacology, Department of Neuroscience, Reproductive Sciences and Dentistry, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Ilaria Piccialli
- Division of Pharmacology, Department of Neuroscience, Reproductive Sciences and Dentistry, School of Medicine, Federico II University of Naples, Naples, Italy
| | | | - Beatrice Severino
- Department of Pharmacy, Federico II University of Naples, Naples, Italy
| | | | - Francesca Boscia
- Division of Pharmacology, Department of Neuroscience, Reproductive Sciences and Dentistry, School of Medicine, Federico II University of Naples, Naples, Italy.
| |
Collapse
|
12
|
Di Martino R, Sisalli MJ, Sirabella R, Della Notte S, Borzacchiello D, Feliciello A, Annunziato L, Scorziello A. Ncx3-Induced Mitochondrial Dysfunction in Midbrain Leads to Neuroinflammation in Striatum of A53t-α-Synuclein Transgenic Old Mice. Int J Mol Sci 2021; 22:ijms22158177. [PMID: 34360942 PMCID: PMC8347885 DOI: 10.3390/ijms22158177] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 07/22/2021] [Accepted: 07/27/2021] [Indexed: 12/24/2022] Open
Abstract
The exact mechanism underlying selective dopaminergic neurodegeneration is not completely understood. The complex interplay among toxic alpha-synuclein aggregates, oxidative stress, altered intracellular Ca2+-homeostasis, mitochondrial dysfunction and disruption of mitochondrial integrity is considered among the pathogenic mechanisms leading to dopaminergic neuronal loss. We herein investigated the molecular mechanisms leading to mitochondrial dysfunction and its relationship with activation of the neuroinflammatory process occurring in Parkinson’s disease. To address these issues, experiments were performed in vitro and in vivo in mice carrying the human mutation of α-synuclein A53T under the prion murine promoter. In these models, the expression and activity of NCX isoforms, a family of important transporters regulating ionic homeostasis in mammalian cells working in a bidirectional way, were evaluated in neurons and glial cells. Mitochondrial function was monitored with confocal microscopy and fluorescent dyes to measure mitochondrial calcium content and mitochondrial membrane potential. Parallel experiments were performed in 4 and 16-month-old A53T-α-synuclein Tg mice to correlate the functional data obtained in vitro with mitochondrial dysfunction and neuroinflammation through biochemical analysis. The results obtained demonstrated: 1. in A53T mice mitochondrial dysfunction occurs early in midbrain and later in striatum; 2. mitochondrial dysfunction occurring in the midbrain is mediated by the impairment of NCX3 protein expression in neurons and astrocytes; 3. mitochondrial dysfunction occurring early in midbrain triggers neuroinflammation later into the striatum, thus contributing to PD progression during mice aging.
Collapse
Affiliation(s)
- Rossana Di Martino
- Department of Neuroscience, Division of Pharmacology, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Via Pansini 5, 80131 Naples, Italy; (R.D.M.); (M.J.S.); (R.S.); (S.D.N.)
| | - Maria Josè Sisalli
- Department of Neuroscience, Division of Pharmacology, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Via Pansini 5, 80131 Naples, Italy; (R.D.M.); (M.J.S.); (R.S.); (S.D.N.)
| | - Rossana Sirabella
- Department of Neuroscience, Division of Pharmacology, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Via Pansini 5, 80131 Naples, Italy; (R.D.M.); (M.J.S.); (R.S.); (S.D.N.)
| | - Salvatore Della Notte
- Department of Neuroscience, Division of Pharmacology, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Via Pansini 5, 80131 Naples, Italy; (R.D.M.); (M.J.S.); (R.S.); (S.D.N.)
| | - Domenica Borzacchiello
- Department of Molecular Medicine and Medical Biotechnology, Federico II University of Naples, Via Pansini 5, 80131 Naples, Italy; (D.B.); (A.F.)
| | - Antonio Feliciello
- Department of Molecular Medicine and Medical Biotechnology, Federico II University of Naples, Via Pansini 5, 80131 Naples, Italy; (D.B.); (A.F.)
| | | | - Antonella Scorziello
- Department of Neuroscience, Division of Pharmacology, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Via Pansini 5, 80131 Naples, Italy; (R.D.M.); (M.J.S.); (R.S.); (S.D.N.)
- Correspondence:
| |
Collapse
|
13
|
Mollo N, Esposito M, Aurilia M, Scognamiglio R, Accarino R, Bonfiglio F, Cicatiello R, Charalambous M, Procaccini C, Micillo T, Genesio R, Calì G, Secondo A, Paladino S, Matarese G, Vita GD, Conti A, Nitsch L, Izzo A. Human Trisomic iPSCs from Down Syndrome Fibroblasts Manifest Mitochondrial Alterations Early during Neuronal Differentiation. BIOLOGY 2021; 10:biology10070609. [PMID: 34209429 PMCID: PMC8301075 DOI: 10.3390/biology10070609] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/25/2021] [Accepted: 06/27/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND The presence of mitochondrial alterations in Down syndrome suggests that it might affect neuronal differentiation. We established a model of trisomic iPSCs, differentiating into neural precursor cells (NPCs) to monitor the occurrence of differentiation defects and mitochondrial dysfunction. METHODS Isogenic trisomic and euploid iPSCs were differentiated into NPCs in monolayer cultures using the dual-SMAD inhibition protocol. Expression of pluripotency and neural differentiation genes was assessed by qRT-PCR and immunofluorescence. Meta-analysis of expression data was performed on iPSCs. Mitochondrial Ca2+, reactive oxygen species (ROS) and ATP production were investigated using fluorescent probes. Oxygen consumption rate (OCR) was determined by Seahorse Analyzer. RESULTS NPCs at day 7 of induction uniformly expressed the differentiation markers PAX6, SOX2 and NESTIN but not the stemness marker OCT4. At day 21, trisomic NPCs expressed higher levels of typical glial differentiation genes. Expression profiles indicated that mitochondrial genes were dysregulated in trisomic iPSCs. Trisomic NPCs showed altered mitochondrial Ca2+, reduced OCR and ATP synthesis, and elevated ROS production. CONCLUSIONS Human trisomic iPSCs can be rapidly and efficiently differentiated into NPC monolayers. The trisomic NPCs obtained exhibit greater glial-like differentiation potential than their euploid counterparts and manifest mitochondrial dysfunction as early as day 7 of neuronal differentiation.
Collapse
Affiliation(s)
- Nunzia Mollo
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
| | - Matteo Esposito
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
| | - Miriam Aurilia
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
| | - Roberta Scognamiglio
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
| | - Rossella Accarino
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
| | - Ferdinando Bonfiglio
- CEINGE-Biotecnologie Avanzate s.c.ar.l., 80145 Naples, Italy;
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, 80125 Naples, Italy
| | - Rita Cicatiello
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
| | - Maria Charalambous
- Institute of Experimental Endocrinology and Oncology “G. Salvatore”, National Research Council, 80131 Naples, Italy; (M.C.); (C.P.); (G.C.)
| | - Claudio Procaccini
- Institute of Experimental Endocrinology and Oncology “G. Salvatore”, National Research Council, 80131 Naples, Italy; (M.C.); (C.P.); (G.C.)
- Neuroimmunology Unit, IRCCS, Fondazione Santa Lucia, 00143 Rome, Italy;
| | - Teresa Micillo
- Neuroimmunology Unit, IRCCS, Fondazione Santa Lucia, 00143 Rome, Italy;
| | - Rita Genesio
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
| | - Gaetano Calì
- Institute of Experimental Endocrinology and Oncology “G. Salvatore”, National Research Council, 80131 Naples, Italy; (M.C.); (C.P.); (G.C.)
| | - Agnese Secondo
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, 80131 Naples, Italy;
| | - Simona Paladino
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
| | - Giuseppe Matarese
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
- Institute of Experimental Endocrinology and Oncology “G. Salvatore”, National Research Council, 80131 Naples, Italy; (M.C.); (C.P.); (G.C.)
| | - Gabriella De Vita
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
| | - Anna Conti
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
| | - Lucio Nitsch
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
- Institute of Experimental Endocrinology and Oncology “G. Salvatore”, National Research Council, 80131 Naples, Italy; (M.C.); (C.P.); (G.C.)
| | - Antonella Izzo
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy; (N.M.); (M.E.); (M.A.); (R.S.); (R.A.); (R.C.); (R.G.); (S.P.); (G.M.); (G.D.V.); (A.C.); (L.N.)
- Correspondence: ; Tel.: +39-081-746-3237
| |
Collapse
|
14
|
Tedeschi V, Sisalli MJ, Petrozziello T, Canzoniero LMT, Secondo A. Lysosomal calcium is modulated by STIM1/TRPML1 interaction which participates to neuronal survival during ischemic preconditioning. FASEB J 2021; 35:e21277. [PMID: 33484198 DOI: 10.1096/fj.202001886r] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 11/02/2020] [Accepted: 11/30/2020] [Indexed: 11/11/2022]
Abstract
A robust activity of the lysosomal Ca2+ channel TRPML1 is sufficient to correct cellular defects in neurodegeneration. Importantly, lysosomes are refilled by the endoplasmic reticulum (ER). However, it is unclear how TRPML1 function could be modulated by the ER. Here, we deal with this issue in rat primary cortical neurons exposed to different oxygen conditions affecting neuronal survival. Under normoxic conditions, TRPML1: (1) showed a wide distribution within soma and along neuronal processes; (2) was stimulated by the synthetic agonist ML-SA1 and the analog of its endogenous modulator, PI(3,5)P2 diC8; (3) its knockdown by siRNA strategy produced an ER Ca2+ accumulation; (4) co-localized and co-immunoprecipitated with the ER-located Ca2+ sensor stromal interacting molecule 1 (STIM1). In cortical neurons lacking STIM1, ML-SA1 and PI(3,5)P2 diC8 failed to induce Ca2+ release and, more deeply, they induced a negligible Ca2+ passage through the channel in neurons transfected with the genetically encoded Ca2+ indicator GCaMP3-ML1. Moreover, TRPML1/STIM1 interplay changed at low-oxygen conditions: both proteins were downregulated during the ischemic preconditioning (IPC) while during IPC followed by 1 hour of normoxia, at which STIM1 is upregulated, TRPML1 protein was reduced. However, during oxygen and glucose deprivation (OGD) followed by reoxygenation, TRPML1 and STIM1 proteins peaked at 8 hours of reoxygenation, when the proteins were co-immunoprecipitated and reactive oxygen species (ROS) hyperproduction was measured in cortical neurons. This may lead to a persistent TRPML1 Ca2+ release and lysosomal Ca2+ loss. Collectively, we showed a new modulation exerted by STIM1 on TRPML1 activity that may differently intervene during hypoxia to regulate organellar Ca2+ homeostasis.
Collapse
Affiliation(s)
- Valentina Tedeschi
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | - Maria José Sisalli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | - Tiziana Petrozziello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | | | - Agnese Secondo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| |
Collapse
|
15
|
Piccialli I, Tedeschi V, Caputo L, Amato G, De Martino L, De Feo V, Secondo A, Pannaccione A. The Antioxidant Activity of Limonene Counteracts Neurotoxicity Triggered byAβ 1-42 Oligomers in Primary Cortical Neurons. Antioxidants (Basel) 2021; 10:antiox10060937. [PMID: 34207788 PMCID: PMC8227170 DOI: 10.3390/antiox10060937] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 11/16/2022] Open
Abstract
Many natural-derived compounds, including the essential oils from plants, are investigated to find new potential protective agents in several neurodegenerative disorders such as Alzheimer's disease (AD). In the present study, we tested the neuroprotective effect of limonene, one of the main components of the genus Citrus, against the neurotoxicity elicited by Aβ1-42 oligomers, currently considered a triggering factor in AD. To this aim, we assessed the acetylcholinesterase activity by Ellman's colorimetric method, the mitochondrial dehydrogenase activity by MTT assay, the nuclear morphology by Hoechst 33258, the generation of reactive oxygen species (ROS) by DCFH-DA fluorescent dye, and the electrophysiological activity of KV3.4 potassium channel subunits by patch-clamp electrophysiology. Interestingly, the monoterpene limonene showed a specific activity against acetylcholinesterase with an IC50 almost comparable to that of galantamine, used as positive control. Moreover, at the concentration of 10 µg/mL, limonene counteracted the increase of ROS production triggered by Aβ1-42 oligomers, thus preventing the upregulation of KV3.4 activity. This, in turn, prevented cell death in primary cortical neurons, showing an interesting neuroprotective profile against Aβ1-42-induced toxicity. Collectively, the present results showed that the antioxidant properties of the main component of the genus Citrus, limonene, may be useful to prevent neuronal suffering induced by Aβ1-42 oligomers preventing the hyperactivity of KV3.4.
Collapse
Affiliation(s)
- Ilaria Piccialli
- Department of Neuroscience, Division of Pharmacology, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, 80131 Naples, Italy; (I.P.); (V.T.)
| | - Valentina Tedeschi
- Department of Neuroscience, Division of Pharmacology, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, 80131 Naples, Italy; (I.P.); (V.T.)
| | - Lucia Caputo
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (L.C.); (G.A.); (L.D.M.); (V.D.F.)
| | - Giuseppe Amato
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (L.C.); (G.A.); (L.D.M.); (V.D.F.)
| | - Laura De Martino
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (L.C.); (G.A.); (L.D.M.); (V.D.F.)
| | - Vincenzo De Feo
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (L.C.); (G.A.); (L.D.M.); (V.D.F.)
| | - Agnese Secondo
- Department of Neuroscience, Division of Pharmacology, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, 80131 Naples, Italy; (I.P.); (V.T.)
- Correspondence: (A.S.); (A.P.); Tel.: +39-0817463335 (A.P.)
| | - Anna Pannaccione
- Department of Neuroscience, Division of Pharmacology, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, 80131 Naples, Italy; (I.P.); (V.T.)
- Correspondence: (A.S.); (A.P.); Tel.: +39-0817463335 (A.P.)
| |
Collapse
|
16
|
Xia Z, Wang C, Wang X, Yu H, Yao H, Shen H, Lan X, Wu X, Zhang G. NCX3 alleviates ethanol-induced apoptosis of SK-N-SH cells via the elimination of intracellular calcium ions. Toxicol In Vitro 2021; 72:105104. [PMID: 33516933 DOI: 10.1016/j.tiv.2021.105104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 11/26/2020] [Accepted: 01/25/2021] [Indexed: 11/18/2022]
Abstract
Long-term alcohol intake may cause nerve cell apoptosis and induce various encephalopathies. Previously, we have shown that the expression of Na+/Ca2+ exchanger 3 (NCX3) was associated with the intracellular calcium concentration ([Ca2+]i) and apoptosis, involved in the spatial memory impairment in male C57BL/6 mice with chronic ethanol (EtOH) exposure. However, the mechanism involved is unclear. Here, we investigated the expression of NCX3 and its protective effect on SK-N-SH cells (a nerve cell line) after EtOH exposure. [Ca2+]i was measured using Fluo-3 AM reagent. Cell viability and the apoptotic rate were assayed using 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt (MTS) and flow cytometry, respectively. The expression of p-cAMP-responsive element binding protein1(p-CREB 1), NCX3 protein, and mRNA were observed using Western blotting and quantitative real-time polymerase chain reaction (qRT-PCR), respectively. Cleaved-caspase-3, caspase-3, rabbit anti- poly (ADP-ribose) polymerase-1 (PARP-1) and calpain-1 proteins were used to assess the degree of apoptosis. Our results showed that EtOH increased [Ca2+]i and apoptosis of SK-N-SH cells in a concentration- and time-dependent manner. The expression of NCX3 protein and mRNA was up regulated obviously after SK-N-SH cells were treated with EtOH. The phosphorylation levels of Akt and CREB 1 were up regulated in cells treated with EtOH. The expression of NCX3 protein was reduced in the SK-N-SH cells treated with Akt phosphorylation inhibitor (LY294002). The [Ca2+]i and apoptosis rate of SK-N-SH cells increased 1.31-fold and 1.52-fold after silencing NCX3 compared with those treated with 200 mM EtOH alone for 2 d. In contrast, the [Ca2+]i and apoptosis rate of SK-N-SH cells decreased 0.26-fold and 0.35-fold after overexpression of NCX3 in the 2 d-200 mM EtOH treatment group. These results suggest that NCX3 plays a critical role in neuronal protection via the elimination of intracellular Ca2+, which may be a promising target for the prevention and treatment of encephalopathy after ethanol exposure.
Collapse
Affiliation(s)
- Zhixiu Xia
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, PR China; Department of General Surgery, Shengjing Hospital of China Medical University, No. 36, San Hao Street, Shenyang, Liaoning 110004, PR China
| | - Changliang Wang
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, PR China; The People's Procuratorate of Liaoning Province Judicial Authentication Center, Shenyang, Liaoning 110032, PR China
| | - Xiaolong Wang
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, PR China
| | - Hao Yu
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, PR China
| | - Hui Yao
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, PR China
| | - Hui Shen
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, PR China
| | - Xinze Lan
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, PR China
| | - Xu Wu
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, PR China
| | - Guohua Zhang
- Department of Forensic Pathology, School of Forensic Medicine, China Medical University, Shenyang, Liaoning 110122, PR China.
| |
Collapse
|
17
|
Formisano L, Laudati G, Guida N, Mascolo L, Serani A, Cuomo O, Cantile M, Boscia F, Molinaro P, Anzilotti S, Pizzorusso V, Di Renzo G, Pignataro G, Annunziato L. HDAC4 and HDAC5 form a complex with DREAM that epigenetically down-regulates NCX3 gene and its pharmacological inhibition reduces neuronal stroke damage. J Cereb Blood Flow Metab 2020; 40:2081-2097. [PMID: 31696766 PMCID: PMC7786841 DOI: 10.1177/0271678x19884742] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The histone deacetylases (HDACs)-dependent mechanisms regulating gene transcription of the Na+/Ca+ exchanger isoform 3 (ncx3) after stroke are still unknown. Overexpression or knocking-down of HDAC4/HDAC5 down-regulates or increases, respectively, NCX3 mRNA and protein. Likewise, MC1568 (class IIa HDACs inhibitor), but not MS-275 (class I HDACs inhibitor) increased NCX3 promoter activity, gene and protein expression. Furthermore, HDAC4 and HDAC5 physically interacted with the transcription factor downstream regulatory element antagonist modulator (DREAM). As MC1568, DREAM knocking-down prevented HDAC4 and HDAC5 recruitment to the ncx3 promoter. Importantly, DREAM, HDAC4, and HDAC5 recruitment to the ncx3 gene was increased in the temporoparietal cortex of rats subjected to transient middle cerebral artery occlusion (tMCAO), with a consequent histone-deacetylation of ncx3 promoter. Conversely, the tMCAO-induced NCX3 reduction was prevented by intracerebroventricular injection of siDREAM, siHDAC4, and siHDAC5. Notably, MC1568 prevented oxygen glucose deprivation plus reoxygenation and tMCAO-induced neuronal damage, whereas its neuroprotective effect was abolished by ncx3 knockdown. Collectively, we found that: (1) DREAM/HDAC4/HDAC5 complex epigenetically down-regulates ncx3 gene transcription after stroke, and (2) pharmacological inhibition of class IIa HDACs reduces stroke-induced neurodetrimental effects.
Collapse
Affiliation(s)
- Luigi Formisano
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | - Giusy Laudati
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | | | - Luigi Mascolo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | - Angelo Serani
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | - Ornella Cuomo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | - Maria Cantile
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | - Francesca Boscia
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | - Pasquale Molinaro
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | | | - Vincenzo Pizzorusso
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | - Gianfranco Di Renzo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | - Giuseppe Pignataro
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | | |
Collapse
|
18
|
Costa G, Sisalli MJ, Simola N, Della Notte S, Casu MA, Serra M, Pinna A, Feliciello A, Annunziato L, Scorziello A, Morelli M. Gender Differences in Neurodegeneration, Neuroinflammation and Na +-Ca 2+ Exchangers in the Female A53T Transgenic Mouse Model of Parkinson's Disease. Front Aging Neurosci 2020; 12:118. [PMID: 32477098 PMCID: PMC7232579 DOI: 10.3389/fnagi.2020.00118] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 04/08/2020] [Indexed: 12/20/2022] Open
Abstract
Twelve-month-old male mice expressing the human A53T variant of α-synuclein (A53T) develop dopamine neuron degeneration, neuroinflammation, and motor deficits, along with dysfunctions of the mitochondrial Na+-Ca2+ exchanger (NCX) isoforms 1 (NCX1) and 3 (NCX3) in the nigrostriatal system. Since gender is thought to play a role in the etiology of Parkinson's disease (PD), we characterized neurochemical and behavioral alterations in 12-month-old female A53T transgenic mice. We investigated the presence of dopaminergic degeneration, astrogliosis and microgliosis using immunohistochemistry for tyrosine hydroxylase (TH), glial fibrillary acidic protein (GFAP) and ionized calcium-binding adaptor molecule-1 (IBA-1) in both the substantia nigra pars compacta (SNc) and striatum. In the same regions, we also evaluated the co-localization of NCX1 in cells positive for IBA-1 and the co-localization of NCX3 in TH-positive neurons and fibers. Furthermore, in both male and female mice, we performed motor (beam walking and pole tests) and memory [novel object recognition (NOR) and spontaneous alternation] tasks, together with tests to evaluate peripheral deficits (olfactory and stool collection tests). Female A53T transgenic mice displayed degeneration of nigral dopaminergic neurons, but neither microgliosis nor astrogliosis in the SNc and striatum. Moreover, female A53T transgenic mice displayed co-localization between NCX1 and IBA-1 positive cells in the striatum but not SNc, whereas NCX3 did not co-localize with either TH-positive terminals or neuronal bodies in the nigrostriatal system. Furthermore, female A53T transgenic mice showed increased crossing time in the beam walking test, but no impairments in the pole or memory tests, and in tests that evaluated peripheral deficits, whereas male A53T transgenic mice displayed motor, memory and peripheral deficits. Immunohistochemical and behavioral results obtained here in the female mice differ from those previously observed in males, and suggest a dissimilar influence of NCX1 and NCX3 on dopaminergic function in female and male A53T transgenic mice, strengthening the validity of these mice as a model for studying the etiological factors of PD.
Collapse
Affiliation(s)
- Giulia Costa
- Department of Biomedical Sciences, Section of Neuroscience, University of Cagliari, Cagliari, Italy
| | - Maria Jose Sisalli
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy
| | - Nicola Simola
- Department of Biomedical Sciences, Section of Neuroscience, University of Cagliari, Cagliari, Italy.,National Institute of Neuroscience (INN), University of Cagliari, Cagliari, Italy
| | - Salvatore Della Notte
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy
| | - Maria Antonietta Casu
- National Research Council of Italy, Institute of Translational Pharmacology, UOS of Cagliari, Scientific and Technological Park of Sardinia POLARIS, Pula, Italy
| | - Marcello Serra
- Department of Biomedical Sciences, Section of Neuroscience, University of Cagliari, Cagliari, Italy
| | - Annalisa Pinna
- National Research Council of Italy, Neuroscience Institute, Cagliari, Italy
| | - Antonio Feliciello
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples Federico II, Naples, Italy
| | - Lucio Annunziato
- SDN Research Institute Diagnostics and Nuclear (IRCCS SDN), Naples, Italy
| | - Antonella Scorziello
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy
| | - Micaela Morelli
- Department of Biomedical Sciences, Section of Neuroscience, University of Cagliari, Cagliari, Italy.,National Institute of Neuroscience (INN), University of Cagliari, Cagliari, Italy.,National Research Council of Italy, Neuroscience Institute, Cagliari, Italy
| |
Collapse
|
19
|
TGF-β Signaling Regulates SLC8A3 Expression and Prevents Oxidative Stress in Developing Midbrain Dopaminergic and Dorsal Raphe Serotonergic Neurons. Int J Mol Sci 2020; 21:ijms21082735. [PMID: 32326436 PMCID: PMC7216069 DOI: 10.3390/ijms21082735] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/08/2020] [Accepted: 04/12/2020] [Indexed: 01/15/2023] Open
Abstract
Calcium homeostasis is a cellular process required for proper cell function and survival, maintained by the coordinated action of several transporters, among them members of the Na+/Ca2+-exchanger family, such as SLC8A3. Transforming growth factor beta (TGF-β) signaling defines neuronal development and survival and may regulate the expression of channels and transporters. We investigated the regulation of SLC8A3 by TGF-β in a conditional knockout mouse with deletion of TGF-β signaling from Engrailed 1-expressing cells, i.e., in cells from the midbrain and rhombomere 1, and elucidated the underlying molecular mechanisms. The results show that SLC8A3 is significantly downregulated in developing dopaminergic and dorsal raphe serotonergic neurons in mutants and that low SLC8A3 abundance prevents the expression of the anti-apoptotic protein Bcl-xL. TGF-β signaling affects SLC8A3 via the canonical and p38 signaling pathway and may increase the binding of Smad4 to the Slc8a3 promoter. Expression of the lipid peroxidation marker malondialdehyde (MDA) was increased following knockdown of Slc8a3 expression in vitro. In neurons lacking TGF-β signaling, the number of MDA- and 4-hydroxynonenal (4-HNE)-positive cells was significantly increased, accompanied with increased cellular 4-HNE abundance. These results suggest that TGF-β contributes to the regulation of SLC8A3 expression in developing dopaminergic and dorsal raphe serotonergic neurons, thereby preventing oxidative stress.
Collapse
|
20
|
Sisalli MJ, Ianniello G, Savoia C, Cuomo O, Annunziato L, Scorziello A. Knocking-out the Siah2 E3 ubiquitin ligase prevents mitochondrial NCX3 degradation, regulates mitochondrial fission and fusion, and restores mitochondrial function in hypoxic neurons. Cell Commun Signal 2020; 18:42. [PMID: 32164721 PMCID: PMC7066748 DOI: 10.1186/s12964-020-0529-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 02/05/2020] [Indexed: 11/10/2022] Open
Abstract
Background Na+/Ca2+ exchanger isoform 3 (NCX3) regulates mitochondrial Ca2+ handling through the outer mitochondrial membrane (OMM) and promotes neuronal survival during oxygen and glucose deprivation (OGD). Conversely, Seven In-Absentia Homolog 2 (Siah2), an E3-ubiquitin ligase, which is activated under hypoxic conditions, causes proteolysis of mitochondrial and cellular proteins. In the present study, we investigated whether siah2, upon its activation during hypoxia, interacts with NCX3 and whether such interaction could regulate the molecular events underlying changes in mitochondrial morphology, i.e., fusion and fission, and function, in neurons exposed to anoxia and anoxia/reoxygenation. Methods To answer these questions, after exposing cortical neurons from siah2 KO mice (siah2 −/−) to OGD and OGD/Reoxygenation, we monitored the changes in mitochondrial fusion and fission protein expression, mitochondrial membrane potential (ΔΨm), and mitochondrial calcium concentration ([Ca2+]m) by using specific fluorescent probes, confocal microscopy, and Western Blot analysis. Results As opposed to congenic wild-type neurons, in neurons from siah2−/− mice exposed to OGD, form factor (FF), an index of the complexity and branching aspect of mitochondria, and aspect ratio (AR), an index reflecting the “length-to-width ratio” of mitochondria, maintained low expression. In KO siah2 neurons exposed to OGD, downregulation of mitofusin 1 (Mfn1), a protein involved in mitochondrial fusion and upregulation of dynamin-related protein 1 (Drp1), a protein involved in the mitochondrial fission, were prevented. Furthermore, under OGD conditions, whereas [Ca2+]m was reduced, ΔΨm, mitochondrial oxidative capacity and ATP production were improved. Interestingly, our immunoprecipitation assay revealed that Siah2 interacted with NCX3. Indeed, siah2 knock-out prevented NCX3 degradation in neurons exposed to OGD. Finally, when siah2−/− neurons were exposed to OGD/reoxygenation, FF, AR, and Mfn1 expression increased, and mitochondrial function improved compared to siah2+/+ neurons. Conclusions Collectively, these findings indicate that hypoxia-induced SIAH2-E3 ligase activation influences mitochondrial fusion and fission, as well as function, by inducing NCX3 degradation. Video Abstract
Collapse
Affiliation(s)
- Maria Josè Sisalli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Gaetano Ianniello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Claudia Savoia
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | - Ornella Cuomo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Via S. Pansini 5, 80131, Naples, Italy
| | | | - Antonella Scorziello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Via S. Pansini 5, 80131, Naples, Italy.
| |
Collapse
|
21
|
Sisalli MJ, Feliciello A, Della Notte S, Di Martino R, Borzacchiello D, Annunziato L, Scorziello A. Nuclear-encoded NCX3 and AKAP121: Two novel modulators of mitochondrial calcium efflux in normoxic and hypoxic neurons. Cell Calcium 2020; 87:102193. [PMID: 32193001 DOI: 10.1016/j.ceca.2020.102193] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/02/2020] [Accepted: 03/04/2020] [Indexed: 12/30/2022]
Abstract
Mitochondria are highly dynamic organelles extremely important for cell survival. Their structure resembles that of prokaryotic cells since they are composed with two membranes, the inner (IMM) and the outer mitochondrial membrane (OMM) delimitating the intermembrane space (IMS) and the matrix which contains mitochondrial DNA (mtDNA). This structure is strictly related to mitochondrial function since they produce the most of the cellular ATP through the oxidative phosphorylation which generate the electrochemical gradient at the two sides of the inner mitochondrial membrane an essential requirement for mitochondrial function. Cells of highly metabolic demand like those composing muscle, liver and brain, are particularly dependent on mitochondria for their activities. Mitochondria undergo to continual changes in morphology since, they fuse and divide, branch and fragment, swell and extend. Importantly, they move throughout the cell to deliver ATP and other metabolites where they are mostly required. Along with the capability to control energy metabolism, mitochondria play a critical role in the regulation of many physiological processes such as programmed cell death, autophagy, redox signalling, and stem cells reprogramming. All these phenomena are regulated by Ca2+ ions within this organelle. This review will discuss the molecular mechanisms regulating mitochondrial calcium cycling in physiological and pathological conditions with particular regard to their impact on mitochondrial dynamics and function during ischemia. Particular emphasis will be devoted to the role played by NCX3 and AKAP121 as new molecular targets for mitochondrial function and dysfunction.
Collapse
Affiliation(s)
- Maria Josè Sisalli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Italy
| | - Antonio Feliciello
- Department of Molecular Medicine and Medical Biotechnology, Federico II University of Naples, Italy
| | - Salvatore Della Notte
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Italy
| | - Rossana Di Martino
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Italy
| | - Domenica Borzacchiello
- Department of Molecular Medicine and Medical Biotechnology, Federico II University of Naples, Italy
| | | | - Antonella Scorziello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples, Italy.
| |
Collapse
|
22
|
Natale S, Anzilotti S, Petrozziello T, Ciccone R, Serani A, Calabrese L, Severino B, Frecentese F, Secondo A, Pannaccione A, Fiorino F, Cuomo O, Vinciguerra A, D'Esposito L, Sadile AG, Cabib S, Di Renzo G, Annunziato L, Molinaro P. Genetic Up-Regulation or Pharmacological Activation of the Na +/Ca 2+ Exchanger 1 (NCX1) Enhances Hippocampal-Dependent Contextual and Spatial Learning and Memory. Mol Neurobiol 2020; 57:2358-2376. [PMID: 32048166 DOI: 10.1007/s12035-020-01888-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 01/29/2020] [Indexed: 01/23/2023]
Abstract
The Na+/Ca2+ exchanger 1 (NCX1) participates in the maintenance of neuronal Na+ and Ca2+ homeostasis, and it is highly expressed at synapse level of some brain areas involved in learning and memory processes, including the hippocampus, cortex, and amygdala. Furthermore, NCX1 increases Akt1 phosphorylation and enhances glutamate-mediated Ca2+ influx during depolarization in hippocampal and cortical neurons, two processes involved in learning and memory mechanisms. We investigated whether the modulation of NCX1 expression/activity might influence learning and memory processes. To this aim, we used a knock-in mouse overexpressing NCX1 in hippocampal, cortical, and amygdala neurons (ncx1.4over) and a newly synthesized selective NCX1 stimulating compound, named CN-PYB2. Both ncx1.4over and CN-PYB2-treated mice showed an amelioration in spatial learning performance in Barnes maze task, and in context-dependent memory consolidation after trace fear conditioning. On the other hand, these mice showed no improvement in novel object recognition task which is mainly dependent on non-spatial memory and displayed an increase in the active phosphorylated CaMKIIα levels in the hippocampus. Interestingly, both of these mice showed an increased level of context-dependent anxiety.Altogether, these results demonstrate that neuronal NCX1 participates in spatial-dependent hippocampal learning and memory processes.
Collapse
Affiliation(s)
- Silvia Natale
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy
| | | | - Tiziana Petrozziello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy
| | - Roselia Ciccone
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy
| | - Angelo Serani
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy
| | - Lucrezia Calabrese
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy
| | - Beatrice Severino
- Department of Pharmacy, "Federico II" University of Naples, 80131, Naples, Italy
| | - Francesco Frecentese
- Department of Pharmacy, "Federico II" University of Naples, 80131, Naples, Italy
| | - Agnese Secondo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy
| | - Anna Pannaccione
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy
| | - Ferdinando Fiorino
- Department of Pharmacy, "Federico II" University of Naples, 80131, Naples, Italy
| | - Ornella Cuomo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy
| | - Antonio Vinciguerra
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy
| | - Lucia D'Esposito
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy
| | | | - Simona Cabib
- Department of Psychology and Centro "Daniel Bovet", Sapienza University, 00185, Rome, Italy
| | - Gianfranco Di Renzo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy
| | | | - Pasquale Molinaro
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, School of Medicine, "Federico II" University of Naples, Via Pansini 5, 80131, Naples, Italy.
| |
Collapse
|
23
|
The activation of Mucolipin TRP channel 1 (TRPML1) protects motor neurons from L-BMAA neurotoxicity by promoting autophagic clearance. Sci Rep 2019; 9:10743. [PMID: 31341250 PMCID: PMC6656764 DOI: 10.1038/s41598-019-46708-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 07/04/2019] [Indexed: 12/14/2022] Open
Abstract
Cellular clearance mechanisms including the autophagy-lysosome pathway are impaired in amyotrophic lateral sclerosis (ALS). One of the most important proteins involved in the regulation of autophagy is the lysosomal Ca2+ channel Mucolipin TRP channel 1 (TRPML1). Therefore, we investigated the role of TRPML1 in a neuronal model of ALS/Parkinson-dementia complex reproduced by the exposure of motor neurons to the cyanobacterial neurotoxin beta-methylamino-L-alanine (L-BMAA). Under these conditions, L-BMAA induces a dysfunction of the endoplasmic reticulum (ER) leading to ER stress and cell death. Therefore we hypothesized a dysfunctional coupling between lysosomes and ER in L-BMAA-treated motor neurons. Here, we showed that in motor neuronal cells TRPML1 as well as the lysosomal protein LAMP1 co-localized with ER. In addition, TRPML1 co-immunoprecipitated with the ER Ca2+ sensor STIM1. Functionally, the TRPML1 agonist ML-SA1 induced lysosomal Ca2+ release in a dose-dependent way in motor neuronal cells. The SERCA inhibitor thapsigargin increased the fluorescent signal associated with lysosomal Ca2+ efflux in the cells transfected with the genetically encoded Ca2+ indicator GCaMP3-ML1, thus suggesting an interplay between the two organelles. Moreover, chronic exposure to L-BMAA reduced TRPML1 protein expression and produced an impairment of both lysosomal and ER Ca2+ homeostasis in primary motor neurons. Interestingly, the preincubation of ML-SA1, by an early activation of AMPK and beclin 1, rescued motor neurons from L-BMAA-induced cell death and reduced the expression of the ER stress marker GRP78. Finally, ML-SA1 reduced the accumulation of the autophagy-related proteins p62/SQSTM1 and LC3-II in L-BMAA-treated motor neurons. Collectively, we propose that the pharmacological stimulation of TRPML1 can rescue motor neurons from L-BMAA-induced toxicity by boosting autophagy and reducing ER stress.
Collapse
|
24
|
Secondo A, Petrozziello T, Tedeschi V, Boscia F, Vinciguerra A, Ciccone R, Pannaccione A, Molinaro P, Pignataro G, Annunziato L. ORAI1/STIM1 Interaction Intervenes in Stroke and in Neuroprotection Induced by Ischemic Preconditioning Through Store-Operated Calcium Entry. Stroke 2019; 50:1240-1249. [DOI: 10.1161/strokeaha.118.024115] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Agnese Secondo
- From the Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Italy (A.S., T.P., V.T., F.B., A.V., R.C., A.P., P.M., G.P.)
| | - Tiziana Petrozziello
- From the Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Italy (A.S., T.P., V.T., F.B., A.V., R.C., A.P., P.M., G.P.)
| | - Valentina Tedeschi
- From the Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Italy (A.S., T.P., V.T., F.B., A.V., R.C., A.P., P.M., G.P.)
| | - Francesca Boscia
- From the Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Italy (A.S., T.P., V.T., F.B., A.V., R.C., A.P., P.M., G.P.)
| | - Antonio Vinciguerra
- From the Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Italy (A.S., T.P., V.T., F.B., A.V., R.C., A.P., P.M., G.P.)
| | - Roselia Ciccone
- From the Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Italy (A.S., T.P., V.T., F.B., A.V., R.C., A.P., P.M., G.P.)
| | - Anna Pannaccione
- From the Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Italy (A.S., T.P., V.T., F.B., A.V., R.C., A.P., P.M., G.P.)
| | - Pasquale Molinaro
- From the Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Italy (A.S., T.P., V.T., F.B., A.V., R.C., A.P., P.M., G.P.)
| | - Giuseppe Pignataro
- From the Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Italy (A.S., T.P., V.T., F.B., A.V., R.C., A.P., P.M., G.P.)
| | | |
Collapse
|
25
|
NCX1 and NCX3 as potential factors contributing to neurodegeneration and neuroinflammation in the A53T transgenic mouse model of Parkinson's Disease. Cell Death Dis 2018; 9:725. [PMID: 29941946 PMCID: PMC6018508 DOI: 10.1038/s41419-018-0775-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 06/01/2018] [Accepted: 06/08/2018] [Indexed: 12/20/2022]
Abstract
Na+-Ca2+ exchanger (NCX) isoforms constitute the major cellular Ca2+ extruding system in neurons and microglia. We herein investigated the role of NCX isoforms in the pathophysiology of Parkinson's disease (PD). Their expression and activity were evaluated in neurons and glia of mice expressing the human A53T variant of α-synuclein (A53T mice), an animal model mimicking a familial form of PD. Western blotting revealed that NCX3 expression in the midbrain of 12-month old A53T mice was lower than that of wild type (WT). Conversely, NCX1 expression increased in the striatum. Immunohistochemical studies showed that glial fibrillary acidic protein (GFAP)-positive astroglial cells significantly increased in the substantia nigra pars compacta (SNc) and in the striatum. However, the number and the density of tyrosine hydroxylase (TH)-positive neurons decreased in both brain regions. Interestingly, ionized calcium binding adaptor molecule 1 (IBA-1)-positive microglial cells increased only in the striatum of A53T mice compared to WT. Double immunostaining studies showed that in A53T mice, NCX1 was exclusively co-expressed in IBA-1-positive microglial cells in the striatum, whereas NCX3 was solely co-expressed in TH-positive neurons in SNc. Beam walking and pole tests revealed a reduction in motor performance for A53T mice compared to WT. In vitro experiments in midbrain neurons from A53T and WT mice demonstrated a reduction in NCX3 expression, which was accompanied by mitochondrial overload of Ca2+ ions, monitored with confocal microscopy by X-Rhod-1 fluorescent dye. Collectively, in vivo and in vitro findings suggest that the reduction in NCX3 expression and activity in A53T neurons from midbrain may cause mitochondrial dysfunction and neuronal death in this brain area, whereas NCX1 overexpression in microglial cells may promote their proliferation in the striatum.
Collapse
|
26
|
Liotti A, Cosimato V, Mirra P, Calì G, Conza D, Secondo A, Luongo G, Terracciano D, Formisano P, Beguinot F, Insabato L, Ulianich L. Oleic acid promotes prostate cancer malignant phenotype via the G protein-coupled receptor FFA1/GPR40. J Cell Physiol 2018; 233:7367-7378. [PMID: 29663374 DOI: 10.1002/jcp.26572] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 02/27/2018] [Indexed: 12/16/2022]
Abstract
Prostate cancer (PCa) is the most commonly diagnosed malignancy in men and the second leading cause of cancer-related death in industrialized countries. Epidemiologic evidence suggests that obesity promotes aggressive PCa. Recently, a family of Free Fatty Acid (FFA) receptors (FFARs) has been identified and reported to affect several crucial biological functions of tumor cells such as proliferation, invasiveness, and apoptosis. Here we report that oleic acid (OA), one of the most prevalent FFA in human plasma, increases proliferation of highly malignant PC3 and DU-145 PCa cells. Furthermore, docetaxel cytotoxic action, the first-line chemotherapeutic agent for the treatment of androgen-independent PCa, was significantly reduced in the presence of OA, when measured by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay, suggesting that this FFA plays also a role in chemoresistance. OA induced intracellular calcium increase, in part due to the store operated calcium entry (SOCE), measured by a calcium imaging technique. Moreover, PI3K/Akt signaling pathway was enhanced, as revealed by increased Akt phosphorylation levels. Intriguingly, attenuating the expression of FFA1/GPR40, a receptor for long chain FFA including OA, prevented the OA-induced effects. Of relevance, we found that FFA1/GPR40 is significantly overexpressed in tissue specimens of PCa, compared to benign prostatic hyperplasia tissues, at both mRNA and protein expression level, analyzed by Real Time RT-PCR and immunofluorescence experiments, respectively. Our data suggest that OA promotes an aggressive phenotype in PCa cells via FFA1/GPR40, calcium and PI3K/Akt signaling. Thus, FFA1/GPR40, might represent a potential useful prognostic biomarker and therapeutic target for the treatment of advanced PCa.
Collapse
Affiliation(s)
- Antonietta Liotti
- Department of Translational Medical Sciences, University "Federico II", Naples, Italy
| | - Vincenzo Cosimato
- Department of Translational Medical Sciences, University "Federico II", Naples, Italy
| | - Paola Mirra
- Department of Medical and Translational Sciences of the University of Naples "Federico II" & URT dell'Istituto di Endocrinologia e Oncologia Sperimentale "Gaetano Salvatore", Consiglio Nazionale delle Ricerche, Naples, Italy
| | - Gaetano Calì
- Istituto di Endocrinologia e Oncologia Sperimentale "Gaetano Salvatore", Consiglio Nazionale delle Ricerche, Naples, Italy
| | - Domenico Conza
- Department of Medical and Translational Sciences of the University of Naples "Federico II" & URT dell'Istituto di Endocrinologia e Oncologia Sperimentale "Gaetano Salvatore", Consiglio Nazionale delle Ricerche, Naples, Italy
| | - Agnese Secondo
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Naples, Italy
| | - Gelsomina Luongo
- Department of Advanced Biomedical Sciences, University "Federico II", Naples, Italy
| | - Daniela Terracciano
- Department of Translational Medical Sciences, University "Federico II", Naples, Italy
| | - Pietro Formisano
- Department of Translational Medical Sciences, University "Federico II", Naples, Italy
| | - Francesco Beguinot
- Department of Medical and Translational Sciences of the University of Naples "Federico II" & URT dell'Istituto di Endocrinologia e Oncologia Sperimentale "Gaetano Salvatore", Consiglio Nazionale delle Ricerche, Naples, Italy
| | - Luigi Insabato
- Department of Advanced Biomedical Sciences, University "Federico II", Naples, Italy
| | - Luca Ulianich
- Department of Medical and Translational Sciences of the University of Naples "Federico II" & URT dell'Istituto di Endocrinologia e Oncologia Sperimentale "Gaetano Salvatore", Consiglio Nazionale delle Ricerche, Naples, Italy
| |
Collapse
|
27
|
D'Errico S, Borbone N, Catalanotti B, Secondo A, Petrozziello T, Piccialli I, Pannaccione A, Costantino V, Mayol L, Piccialli G, Oliviero G. Synthesis and Biological Evaluation of a New Structural Simplified Analogue of cADPR, a Calcium-Mobilizing Secondary Messenger Firstly Isolated from Sea Urchin Eggs. Mar Drugs 2018; 16:E89. [PMID: 29534435 PMCID: PMC5867633 DOI: 10.3390/md16030089] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 03/05/2018] [Accepted: 03/07/2018] [Indexed: 12/22/2022] Open
Abstract
Herein, we reported on the synthesis of cpIPP, which is a new structurally-reduced analogue of cyclic ADP-ribose (cADPR), a potent Ca2+-releasing secondary messenger that was firstly isolated from sea urchin eggs extracts. To obtain cpIPP the "northern" ribose of cADPR was replaced by a pentyl chain and the pyrophosphate moiety by a phophono-phosphate anhydride. The effect of the presence of the new phosphono-phosphate bridge on the intracellular Ca2+ release induced by cpIPP was assessed in PC12 neuronal cells in comparison with the effect of the pyrophosphate bridge of the structurally related cyclic N1-butylinosine diphosphate analogue (cbIDP), which was previously synthesized in our laboratories, and with that of the linear precursor of cpIPP, which, unexpectedly, revealed to be the only one provided with Ca2+ release properties.
Collapse
Affiliation(s)
- Stefano D'Errico
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, via Domenico Montesano 49, 80131 Napoli, Italy.
- SYSBIO, Centre of Systems Biology, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy.
| | - Nicola Borbone
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, via Domenico Montesano 49, 80131 Napoli, Italy.
- SYSBIO, Centre of Systems Biology, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy.
| | - Bruno Catalanotti
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, via Domenico Montesano 49, 80131 Napoli, Italy.
| | - Agnese Secondo
- Divisione di Farmacologia, Dipartimento di Neuroscienze, Scienze Riproduttive e Odontostomatologiche, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131 Napoli, Italy.
| | - Tiziana Petrozziello
- Divisione di Farmacologia, Dipartimento di Neuroscienze, Scienze Riproduttive e Odontostomatologiche, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131 Napoli, Italy.
| | - Ilaria Piccialli
- Divisione di Farmacologia, Dipartimento di Neuroscienze, Scienze Riproduttive e Odontostomatologiche, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131 Napoli, Italy.
| | - Anna Pannaccione
- Divisione di Farmacologia, Dipartimento di Neuroscienze, Scienze Riproduttive e Odontostomatologiche, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131 Napoli, Italy.
| | - Valeria Costantino
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, via Domenico Montesano 49, 80131 Napoli, Italy.
| | - Luciano Mayol
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, via Domenico Montesano 49, 80131 Napoli, Italy.
| | - Gennaro Piccialli
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, via Domenico Montesano 49, 80131 Napoli, Italy.
- Divisione di Farmacologia, Dipartimento di Neuroscienze, Scienze Riproduttive e Odontostomatologiche, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131 Napoli, Italy.
| | - Giorgia Oliviero
- SYSBIO, Centre of Systems Biology, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy.
- Dipartimento di Biologia Molecolare e Biotecnologie Mediche, Università degli Studi di Napoli Federico II, via Sergio Pansini 5, 80131 Napoli, Italy.
| |
Collapse
|
28
|
Na +/Ca 2+ exchanger 1 on nuclear envelope controls PTEN/Akt pathway via nucleoplasmic Ca 2+ regulation during neuronal differentiation. Cell Death Discov 2018. [PMID: 29531809 PMCID: PMC5841316 DOI: 10.1038/s41420-017-0018-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Nuclear envelope (NE) is a Ca2+-storing organelle controlling neuronal differentiation through nuclear Ca2+ concentrations ([Ca2+]n). However, how [Ca2+]n regulates this important function remains unknown. Here, we investigated the role of the nuclear form of the Na+/Ca2+ exchanger 1(nuNCX1) during the different stages of neuronal differentiation and the involvement of PTEN/PI3'K/Akt pathway. In neuronal cells, nuNCX1 was detected on the inner membrane of the NE where protein expression and activity of the exchanger increased during NGF-induced differentiation. nuNCX1 activation by Na+-free perfusion induced a time-dependent activation of nuclear-resident PI3K/Akt pathway in isolated nuclei. To discriminate the contribution of nuNCX1 from those of plasma membrane NCX, we generated a chimeric protein composed of the fluorophore EYFP, the exchanger inhibitory peptide, and the nuclear localization signal, named XIP-NLS. Fura-2 measurements on single nuclei and patch-clamp experiments in whole-cell configuration showed that XIP-NLS selectively inhibited nuNCX1. Once it reached the nuclear compartment, XIP-NLS increased the nucleoplasmic Ca2+ peak elicited by ATP and reduced Akt phosphorylation, GAP-43 and MAP-2 expression through nuclear-resident PTEN induction. Furthermore, in accordance with the prevention of the neuronal phenotype, XIP-NLS significantly reduced TTX-sensitive Na+ currents and membrane potential during neuronal differentiation. The selective inhibition of nuNCX1 by XIP-NLS increased the percentage of β III tubulin-positive immature neurons in mature cultures of MAP-2-positive cortical neurons, thus unraveling a new function for nuNCX1 in regulating neuronal differentiation through [Ca2+]n-dependent PTEN/PI3K/Akt pathway.
Collapse
|
29
|
Differential regulation of the Na +-Ca 2+ exchanger 3 (NCX3) by protein kinase PKC and PKA. Cell Calcium 2017; 65:52-62. [PMID: 28233567 DOI: 10.1016/j.ceca.2017.02.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 02/09/2017] [Accepted: 02/09/2017] [Indexed: 11/21/2022]
Abstract
Isoform 3 of the Na+-Ca2+ exchanger (NCX3) participates in the Ca2+ fluxes across the plasma membrane. Among the NCX family, NCX3 carries out a peculiar role due to its specific functions in skeletal muscle and the immune system and to its neuroprotective effect under stress exposure. In this context, proper understanding of the regulation of NCX3 is primordial to consider its potential use as a drug target. In this study, we demonstrated the regulation of NCX3 by protein kinase A (PKA) and C (PKC). Disparity in regulation has been previously reported among the splice variants of NCX3 therefore the activity of Ca2+ uptake and extrusion of the two murine variants was measured using fura-2-based Ca2+ imaging and revealed that both variants are similarly regulated. PKC stimulation diminished the Ca2+ uptake performed by NCX3 in the reverse mode, triggered by a rise in [Ca2+]i or [Na+]i, whereas an opposite response was observed upon PKA stimulation, with a significant increase of the Ca2+ uptake after a rise in [Ca2+]i. The latter stimulation affected similarly the efflux capacity of NCX3 whereas Ca2+ extrusion capacity remained unaffected under activation of PKC. Next, using site-directed mutagenesis, the sensitivity of NCX3 to PKC was abolished by singly mutating its predicted phosphorylation sites T529 or S695. The sensitivity to PKC might be due to the influence of T529 phosphorylation on the Ca2+-binding domain 1. Additionally, we showed that stimulation of NCX3 by PKA occurred through residue S524. This effect may well participate in the fight-or-flight response in skeletal muscle and the long-term potentiation in hippocampus.
Collapse
|
30
|
Petrozziello T, Secondo A, Tedeschi V, Esposito A, Sisalli M, Scorziello A, Di Renzo G, Annunziato L. ApoSOD1 lacking dismutase activity neuroprotects motor neurons exposed to beta-methylamino-L-alanine through the Ca 2+/Akt/ERK1/2 prosurvival pathway. Cell Death Differ 2017; 24:511-522. [PMID: 28085149 PMCID: PMC5344211 DOI: 10.1038/cdd.2016.154] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 11/04/2016] [Accepted: 11/24/2016] [Indexed: 01/05/2023] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a severe human adult-onset neurodegenerative disease affecting lower and upper motor neurons. In >20% of cases, the familial form of ALS is caused by mutations in the gene encoding Cu,Zn-superoxide dismutase (SOD1). Interestingly, administration of wild-type SOD1 to SOD1G93A transgenic rats ameliorates motor symptoms through an unknown mechanism. Here we investigated whether the neuroprotective effects of SOD1 are due to the Ca2+-dependent activation of such prosurvival signaling pathway and not to its catalytic activity. To this aim, we also examined the mechanism of neuroprotective action of ApoSOD1, the metal-depleted state of SOD1 that lacks dismutase activity, in differentiated motor neuron-like NSC-34 cells and in primary motor neurons exposed to the cycad neurotoxin beta-methylamino-L-alanine (L-BMAA). Preincubation of ApoSOD1 and SOD1, but not of human recombinant SOD1G93A, prevented cell death in motor neurons exposed to L-BMAA. Moreover, ApoSOD1 elicited ERK1/2 and Akt phosphorylation in motor neurons through an early increase of intracellular Ca2+ concentration ([Ca2+]i). Accordingly, inhibition of ERK1/2 by siMEK1 and PD98059 counteracted ApoSOD1- and SOD1-induced neuroprotection. Similarly, transfection of the dominant-negative form of Akt in NSC-34 motor neurons and treatment with the selective PI3K inhibitor LY294002 prevented ApoSOD1- and SOD1-mediated neuroprotective effects in L-BMAA-treated motor neurons. Furthermore, ApoSOD1 and SOD1 prevented the expression of the two markers of L-BMAA-induced ER stress GRP78 and caspase-12. Collectively, our data indicate that ApoSOD1, which is devoid of any catalytic dismutase activity, exerts a neuroprotective effect through an early activation of Ca2+/Akt/ERK1/2 pro-survival pathway that, in turn, prevents ER stress in a neurotoxic model of ALS.
Collapse
Affiliation(s)
- Tiziana Petrozziello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples, Italy
| | - Agnese Secondo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples, Italy
| | - Valentina Tedeschi
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples, Italy
| | - Alba Esposito
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples, Italy
| | - MariaJosè Sisalli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples, Italy
| | - Antonella Scorziello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples, Italy
| | - Gianfranco Di Renzo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples, Italy
| | - Lucio Annunziato
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples, Italy.,Fondazione IRCCS SDN, Naples, Italy
| |
Collapse
|
31
|
Khaksar S, Bigdeli MR. Anti-excitotoxic effects of cannabidiol are partly mediated by enhancement of NCX2 and NCX3 expression in animal model of cerebral ischemia. Eur J Pharmacol 2017; 794:270-279. [DOI: 10.1016/j.ejphar.2016.11.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 11/04/2016] [Accepted: 11/04/2016] [Indexed: 11/16/2022]
|
32
|
Krill JL, Dawson-Scully K. cGMP-Dependent Protein Kinase Inhibition Extends the Upper Temperature Limit of Stimulus-Evoked Calcium Responses in Motoneuronal Boutons of Drosophila melanogaster Larvae. PLoS One 2016; 11:e0164114. [PMID: 27711243 PMCID: PMC5053426 DOI: 10.1371/journal.pone.0164114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 09/20/2016] [Indexed: 12/31/2022] Open
Abstract
While the mammalian brain functions within a very narrow range of oxygen concentrations and temperatures, the fruit fly, Drosophila melanogaster, has employed strategies to deal with a much wider range of acute environmental stressors. The foraging (for) gene encodes the cGMP-dependent protein kinase (PKG), has been shown to regulate thermotolerance in many stress-adapted species, including Drosophila, and could be a potential therapeutic target in the treatment of hyperthermia in mammals. Whereas previous thermotolerance studies have looked at the effects of PKG variation on Drosophila behavior or excitatory postsynaptic potentials at the neuromuscular junction (NMJ), little is known about PKG effects on presynaptic mechanisms. In this study, we characterize presynaptic calcium ([Ca2+]i) dynamics at the Drosophila larval NMJ to determine the effects of high temperature stress on synaptic transmission. We investigated the neuroprotective role of PKG modulation both genetically using RNA interference (RNAi), and pharmacologically, to determine if and how PKG affects presynaptic [Ca2+]i dynamics during hyperthermia. We found that PKG activity modulates presynaptic neuronal Ca2+ responses during acute hyperthermia, where PKG activation makes neurons more sensitive to temperature-induced failure of Ca2+ flux and PKG inhibition confers thermotolerance and maintains normal Ca2+ dynamics under the same conditions. Targeted motoneuronal knockdown of PKG using RNAi demonstrated that decreased PKG expression was sufficient to confer thermoprotection. These results demonstrate that the PKG pathway regulates presynaptic motoneuronal Ca2+ signaling to influence thermotolerance of presynaptic function during acute hyperthermia.
Collapse
Affiliation(s)
- Jennifer L. Krill
- Department of Biological Sciences, Florida Atlantic University, Boca Raton, Florida, United States of America
| | - Ken Dawson-Scully
- Department of Biological Sciences, Florida Atlantic University, Boca Raton, Florida, United States of America
- * E-mail:
| |
Collapse
|
33
|
Boscia F, Begum G, Pignataro G, Sirabella R, Cuomo O, Casamassa A, Sun D, Annunziato L. Glial Na(+) -dependent ion transporters in pathophysiological conditions. Glia 2016; 64:1677-97. [PMID: 27458821 DOI: 10.1002/glia.23030] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 06/22/2016] [Accepted: 06/29/2016] [Indexed: 12/12/2022]
Abstract
Sodium dynamics are essential for regulating functional processes in glial cells. Indeed, glial Na(+) signaling influences and regulates important glial activities, and plays a role in neuron-glia interaction under physiological conditions or in response to injury of the central nervous system (CNS). Emerging studies indicate that Na(+) pumps and Na(+) -dependent ion transporters in astrocytes, microglia, and oligodendrocytes regulate Na(+) homeostasis and play a fundamental role in modulating glial activities in neurological diseases. In this review, we first briefly introduced the emerging roles of each glial cell type in the pathophysiology of cerebral ischemia, Alzheimer's disease, epilepsy, Parkinson's disease, Amyotrophic Lateral Sclerosis, and myelin diseases. Then, we discussed the current knowledge on the main roles played by the different glial Na(+) -dependent ion transporters, including Na(+) /K(+) ATPase, Na(+) /Ca(2+) exchangers, Na(+) /H(+) exchangers, Na(+) -K(+) -Cl(-) cotransporters, and Na(+) - HCO3- cotransporter in the pathophysiology of the diverse CNS diseases. We highlighted their contributions in cell survival, synaptic pathology, gliotransmission, pH homeostasis, and their role in glial activation, migration, gliosis, inflammation, and tissue repair processes. Therefore, this review summarizes the foundation work for targeting Na(+) -dependent ion transporters in glia as a novel strategy to control important glial activities associated with Na(+) dynamics in different neurological disorders. GLIA 2016;64:1677-1697.
Collapse
Affiliation(s)
- Francesca Boscia
- Division of Pharmacology, Department of Neuroscience, Reproductive, and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Gulnaz Begum
- Department of Neurology, University of Pittsburgh Medical School
| | - Giuseppe Pignataro
- Division of Pharmacology, Department of Neuroscience, Reproductive, and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Rossana Sirabella
- Division of Pharmacology, Department of Neuroscience, Reproductive, and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Ornella Cuomo
- Division of Pharmacology, Department of Neuroscience, Reproductive, and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Antonella Casamassa
- Division of Pharmacology, Department of Neuroscience, Reproductive, and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Naples, Italy
| | - Dandan Sun
- Department of Neurology, University of Pittsburgh Medical School.,Veterans Affairs Pittsburgh Health Care System, Geriatric Research, Educational and Clinical Center, Pittsburgh, Pennsylvania, 15213
| | - Lucio Annunziato
- Division of Pharmacology, Department of Neuroscience, Reproductive, and Odontostomatological Sciences, School of Medicine, Federico II University of Naples, Naples, Italy
| |
Collapse
|
34
|
Staiano RI, Loffredo S, Borriello F, Iannotti FA, Piscitelli F, Orlando P, Secondo A, Granata F, Lepore MT, Fiorelli A, Varricchi G, Santini M, Triggiani M, Di Marzo V, Marone G. Human lung-resident macrophages express CB1 and CB2 receptors whose activation inhibits the release of angiogenic and lymphangiogenic factors. J Leukoc Biol 2016; 99:531-40. [PMID: 26467187 PMCID: PMC4787289 DOI: 10.1189/jlb.3hi1214-584r] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 07/28/2015] [Accepted: 09/02/2015] [Indexed: 01/03/2023] Open
Abstract
Macrophages are pivotal effector cells in immune responses and tissue remodeling by producing a wide spectrum of mediators, including angiogenic and lymphangiogenic factors. Activation of cannabinoid receptor types 1 and 2 has been suggested as a new strategy to modulate angiogenesis in vitro and in vivo. We investigated whether human lung-resident macrophages express a complete endocannabinoid system by assessing their production of endocannabinoids and expression of cannabinoid receptors. Unstimulated human lung macrophage produce 2-arachidonoylglycerol,N-arachidonoyl-ethanolamine,N-palmitoyl-ethanolamine, and N-oleoyl-ethanolamine. On LPS stimulation, human lung macrophages selectively synthesize 2-arachidonoylglycerol in a calcium-dependent manner. Human lung macrophages express cannabinoid receptor types 1 and 2, and their activation induces ERK1/2 phosphorylation and reactive oxygen species generation. Cannabinoid receptor activation by the specific synthetic agonists ACEA and JWH-133 (but not the endogenous agonist 2-arachidonoylglycerol) markedly inhibits LPS-induced production of vascular endothelial growth factor-A, vascular endothelial growth factor-C, and angiopoietins and modestly affects IL-6 secretion. No significant modulation of TNF-α or IL-8/CXCL8 release was observed. The production of vascular endothelial growth factor-A by human monocyte-derived macrophages is not modulated by activation of cannabinoid receptor types 1 and 2. Given the prominent role of macrophage-assisted vascular remodeling in many tumors, we identified the expression of cannabinoid receptors in lung cancer-associated macrophages. Our results demonstrate that cannabinoid receptor activation selectively inhibits the release of angiogenic and lymphangiogenic factors from human lung macrophage but not from monocyte-derived macrophages. Activation of cannabinoid receptors on tissue-resident macrophages might be a novel strategy to modulate macrophage-assisted vascular remodeling in cancer and chronic inflammation.
Collapse
Affiliation(s)
- Rosaria I Staiano
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Stefania Loffredo
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Francesco Borriello
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Fabio Arturo Iannotti
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Fabiana Piscitelli
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Pierangelo Orlando
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Agnese Secondo
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Francescopaolo Granata
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Maria Teresa Lepore
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Alfonso Fiorelli
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Gilda Varricchi
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Mario Santini
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Massimo Triggiani
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Vincenzo Di Marzo
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| | - Gianni Marone
- Departments of *Translational Medical Sciences and Center for Basic and Clinical Immunology Research and Neuroscience, Reproductive and Odontostomatological Sciences, University of Naples Federico II, Naples, Italy; Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale delle Ricerche, Pozzuoli, Naples, Italy; Endocannabinoid Research Group, Institute of Protein Biochemistry, Consiglio Nazionale delle Ricerche, Naples, Italy; Thoracic Surgery Unit, Second University of Naples, Naples, Italy; Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy; and Consiglio Nazionale delle Ricerche Institute of Experimental Endocrinology and Oncology "G. Salvatore," Naples, Italy
| |
Collapse
|
35
|
Mahal A, D'Errico S, Borbone N, Pinto B, Secondo A, Costantino V, Tedeschi V, Oliviero G, Piccialli V, Piccialli G. Synthesis of cyclic N (1)-pentylinosine phosphate, a new structurally reduced cADPR analogue with calcium-mobilizing activity on PC12 cells. Beilstein J Org Chem 2015; 11:2689-2695. [PMID: 26877790 PMCID: PMC4734301 DOI: 10.3762/bjoc.11.289] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 12/04/2015] [Indexed: 12/28/2022] Open
Abstract
Cyclic N1-pentylinosine monophosphate (cpIMP), a novel simplified inosine derivative of cyclic ADP-ribose (cADPR) in which the N1-pentyl chain and the monophosphate group replace the northern ribose and the pyrophosphate moieties, respectively, was synthesized. The role played by the position of the phosphate group in the key cyclization step, which consists in the formation of a phosphodiester bond, was thoroughly investigated. We have also examined the influence of the phosphate bridge on the ability of cpIMP to mobilize Ca2+ in PC12 neuronal cells in comparison with the pyrophosphate bridge present in the cyclic N1-pentylinosine diphosphate analogue (cpIDP) previously synthesized in our laboratories. The preliminary biological tests indicated that cpIMP and cpIDP induce a rapid increase of intracellular Ca2+ concentration in PC12 neuronal cells.
Collapse
Affiliation(s)
- Ahmed Mahal
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131, Napoli, Italy
| | - Stefano D'Errico
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131, Napoli, Italy
| | - Nicola Borbone
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131, Napoli, Italy
| | - Brunella Pinto
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131, Napoli, Italy
| | - Agnese Secondo
- Dipartimento di Neuroscienze e Scienze Riproduttive ed Odontostomatologiche, Università degli Studi di Napoli Federico II, Via Pansini 5, 80131 Napoli, Italy
| | - Valeria Costantino
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131, Napoli, Italy
| | - Valentina Tedeschi
- Dipartimento di Neuroscienze e Scienze Riproduttive ed Odontostomatologiche, Università degli Studi di Napoli Federico II, Via Pansini 5, 80131 Napoli, Italy
| | - Giorgia Oliviero
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131, Napoli, Italy
| | - Vincenzo Piccialli
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, Napoli, Italy
| | - Gennaro Piccialli
- Dipartimento di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131, Napoli, Italy.,Institute of Protein Biochemistry, National Council Research of Italy, Via Pietro Castellino 111, 80131 Napoli, Italy
| |
Collapse
|
36
|
Michel LYM, Hoenderop JGJ, Bindels RJM. Calpain-3-mediated regulation of the Na⁺-Ca²⁺ exchanger isoform 3. Pflugers Arch 2015; 468:243-55. [PMID: 26503425 PMCID: PMC4713461 DOI: 10.1007/s00424-015-1747-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 10/05/2015] [Accepted: 10/07/2015] [Indexed: 12/27/2022]
Abstract
Ca2+ disturbances are observed when Ca2+-dependent cysteine proteases malfunction, causing muscle weakness and wasting. For example, loss of calpain-3 (CAPN3) activity leads to limb-girdle muscular dystrophy 2A (LGMD2A). In neuronal excitotoxicity, the cleavage of the Na+-Ca2+ exchanger isoform 3 (NCX3) has been associated with an increase in activity and elevation of the Ca2+ content in the endoplasmic reticulum (ER). Since NCX3 is expressed in skeletal muscle, we evaluated the cleavage of different NCX3 splice variants by CAPN1 and CAPN3. Using Fura-2-based cellular Ca2+ imaging, we showed for the first time that CAPN3 increases NCX3 activity and that only NCX3-AC, the variant predominantly expressed in skeletal muscle, is sensitive to calpain. The silencing of the endogenous CAPN1 and the expression of the inactive form of CAPN3 (C129S CAPN3) confirmed the specificity for CAPN1 and CAPN3. Functional studies revealed that cellular Ca2+ uptake through the reverse mode of NCX3 was significantly increased independently of the mode of activation of the exchanger by either a rise in intracellular Ca2+ ([Ca2+]i) or Na+ ([Na+]i). Subsequently, the sensitivity to CAPN1 and CAPN3 could be abrogated by removal of the six residues coded in exon C of NCX3-AC. Additionally, mutation of the Leu-600 and Leu-601 suggested the presence of a cleavage site at Leu-602. The increased Ca2+ uptake of NCX3 might participate in the Ca2+ refilling of the sarcoplasmic reticulum (SR) after the excitation-contraction uncoupling following exercise and therefore be implicated in the impaired reticular Ca2+ storage observed in LGMD2A.
Collapse
Affiliation(s)
- Lauriane Y M Michel
- From the Department of Physiology, Centre for System Biology and Bioenergetics, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Joost G J Hoenderop
- From the Department of Physiology, Centre for System Biology and Bioenergetics, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - René J M Bindels
- From the Department of Physiology, Centre for System Biology and Bioenergetics, Radboud University Medical Center, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.
| |
Collapse
|
37
|
Secondo A, Pignataro G, Ambrosino P, Pannaccione A, Molinaro P, Boscia F, Cantile M, Cuomo O, Esposito A, Sisalli MJ, Scorziello A, Guida N, Anzilotti S, Fiorino F, Severino B, Santagada V, Caliendo G, Di Renzo G, Annunziato L. Pharmacological characterization of the newly synthesized 5-amino-N-butyl-2-(4-ethoxyphenoxy)-benzamide hydrochloride (BED) as a potent NCX3 inhibitor that worsens anoxic injury in cortical neurons, organotypic hippocampal cultures, and ischemic brain. ACS Chem Neurosci 2015; 6:1361-70. [PMID: 25942323 DOI: 10.1021/acschemneuro.5b00043] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The Na(+)/Ca(2+) exchanger (NCX), a 10-transmembrane domain protein mainly involved in the regulation of intracellular Ca(2+) homeostasis, plays a crucial role in cerebral ischemia. In the present paper, we characterized the effect of the newly synthesized compound 5-amino-N-butyl-2-(4-ethoxyphenoxy)-benzamide hydrochloride (BED) on the activity of the three NCX isoforms and on the evolution of cerebral ischemia. BED inhibited NCX isoform 3 (NCX3) activity (IC50 = 1.9 nM) recorded with the help of single-cell microflorimetry, (45)Ca(2+) radiotracer fluxes, and patch-clamp in whole-cell configuration. Furthermore, this drug displayed negligible effect on NCX2, the other isoform expressed within the CNS, and it failed to modulate the ubiquitously expressed NCX1 isoform. Concerning the molecular site of action, the use of chimera strategy and deletion mutagenesis showed that α1 and α2 repeats of NCX3 represented relevant molecular determinants for BED inhibitory action, whereas the intracellular regulatory f-loop was not involved. At 10 nM, BED worsened the damage induced by oxygen/glucose deprivation (OGD) followed by reoxygenation in cortical neurons through a dysregulation of [Ca(2+)]i. Furthermore, at the same concentration, BED significantly enhanced cell death in CA3 subregion of hippocampal organotypic slices exposed to OGD and aggravated infarct injury after transient middle cerebral artery occlusion in mice. These results showed that the newly synthesized 5-amino-N-butyl-2-(4-ethoxyphenoxy)-benzamide hydrochloride is one of the most potent inhibitor of NCX3 so far identified, representing an useful tool to dissect the role played by NCX3 in the control of Ca(2+) homeostasis under physiological and pathological conditions.
Collapse
Affiliation(s)
- Agnese Secondo
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | - Giuseppe Pignataro
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | - Paolo Ambrosino
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | - Anna Pannaccione
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | - Pasquale Molinaro
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | - Francesca Boscia
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | - Maria Cantile
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | - Ornella Cuomo
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | - Alba Esposito
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | - Maria Josè Sisalli
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | - Antonella Scorziello
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | | | | | | | | | | | | | - Gianfranco Di Renzo
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| | - Lucio Annunziato
- Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, “Federico II” University of Naples, Via Pansini 5, 80131 Naples, Italy
| |
Collapse
|
38
|
Cuomo O, Vinciguerra A, Cerullo P, Anzilotti S, Brancaccio P, Bilo L, Scorziello A, Molinaro P, Di Renzo G, Pignataro G. Ionic homeostasis in brain conditioning. Front Neurosci 2015; 9:277. [PMID: 26321902 PMCID: PMC4530315 DOI: 10.3389/fnins.2015.00277] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 07/23/2015] [Indexed: 12/26/2022] Open
Abstract
Most of the current focus on developing neuroprotective therapies is aimed at preventing neuronal death. However, these approaches have not been successful despite many years of clinical trials mainly because the numerous side effects observed in humans and absent in animals used at preclinical level. Recently, the research in this field aims to overcome this problem by developing strategies which induce, mimic, or boost endogenous protective responses and thus do not interfere with physiological neurotransmission. Preconditioning is a protective strategy in which a subliminal stimulus is applied before a subsequent harmful stimulus, thus inducing a state of tolerance in which the injury inflicted by the challenge is mitigated. Tolerance may be observed in ischemia, seizure, and infection. Since it requires protein synthesis, it confers delayed and temporary neuroprotection, taking hours to develop, with a pick at 1–3 days. A new promising approach for neuroprotection derives from post-conditioning, in which neuroprotection is achieved by a modified reperfusion subsequent to a prolonged ischemic episode. Many pathways have been proposed as plausible mechanisms to explain the neuroprotection offered by preconditioning and post-conditioning. Although the mechanisms through which these two endogenous protective strategies exert their effects are not yet fully understood, recent evidence highlights that the maintenance of ionic homeostasis plays a key role in propagating these neuroprotective phenomena. The present article will review the role of protein transporters and ionic channels involved in the control of ionic homeostasis in the neuroprotective effect of ischemic preconditioning and post-conditioning in adult brain, with particular regards to the Na+/Ca2+ exchangers (NCX), the plasma membrane Ca2+-ATPase (PMCA), the Na+/H+ exchange (NHE), the Na+/K+/2Cl− cotransport (NKCC) and the acid-sensing cation channels (ASIC). Ischemic stroke is the third leading cause of death and disability. Up until now, all clinical trials testing potential stroke neuroprotectants failed. For this reason attention of researchers has been focusing on the identification of brain endogenous neuroprotective mechanisms activated after cerebral ischemia. In this context, ischemic preconditioning and ischemic post-conditioning represent two neuroprotecive strategies to investigate in order to identify new molecular target to reduce the ischemic damage.
Collapse
Affiliation(s)
- Ornella Cuomo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples Naples, Italy
| | - Antonio Vinciguerra
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples Naples, Italy
| | - Pierpaolo Cerullo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples Naples, Italy
| | | | - Paola Brancaccio
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples Naples, Italy
| | - Leonilda Bilo
- Division of Neurology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples Naples, Italy
| | - Antonella Scorziello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples Naples, Italy
| | - Pasquale Molinaro
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples Naples, Italy
| | - Gianfranco Di Renzo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples Naples, Italy
| | - Giuseppe Pignataro
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples Naples, Italy
| |
Collapse
|
39
|
Sisalli MJ, Annunziato L, Scorziello A. Novel Cellular Mechanisms for Neuroprotection in Ischemic Preconditioning: A View from Inside Organelles. Front Neurol 2015; 6:115. [PMID: 26074868 PMCID: PMC4443717 DOI: 10.3389/fneur.2015.00115] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 05/05/2015] [Indexed: 11/16/2022] Open
Abstract
Ischemic preconditioning represents an important adaptation mechanism of CNS, which results in its increased tolerance to the lethal cerebral ischemia. The molecular mechanisms responsible for the induction and maintenance of ischemic tolerance in the brain are complex and not yet completely clarified. In the last 10 years, great attention has been devoted to unravel the intracellular pathways activated by preconditioning and responsible for the establishing of the tolerant phenotype. Indeed, recent papers have been published supporting the hypothesis that mitochondria might act as master regulators of preconditioning-triggered endogenous neuroprotection due to their ability to control cytosolic calcium homeostasis. More interestingly, the demonstration that functional alterations in the ability of mitochondria and endoplasmic reticulum (ER) managing calcium homeostasis during ischemia, opened a new line of research focused to the role played by mitochondria and ER cross-talk in the pathogenesis of cerebral ischemia in order to identify new molecular mechanisms involved in the ischemic tolerance. In line with these findings and considering that the expression of the three isoforms of the sodium calcium exchanger (NCX), NCX1, NCX2, and NCX3, mainly responsible for the regulation of Ca2+ homeostasis, was reduced during cerebral ischemia, it was investigated whether these proteins might play a role in neuroprotection induced by ischemic tolerance. In this review, evidence supporting the involvement of ER and mitochondria interaction within the preconditioning paradigm will be provided. In particular, the key role played by NCXs in the regulation of Ca2+-homeostasis at the different subcellular compartments will be discussed as new molecular mechanism proposed for the establishing of ischemic tolerant phenotype.
Collapse
Affiliation(s)
- Maria Josè Sisalli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Science, School of Medicine, Federico II University of Naples , Naples , Italy
| | - Lucio Annunziato
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Science, School of Medicine, Federico II University of Naples , Naples , Italy ; Fondazione IRCSS SDN , Naples , Italy
| | - Antonella Scorziello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Science, School of Medicine, Federico II University of Naples , Naples , Italy
| |
Collapse
|
40
|
Towards Understanding the Role of the Na+-Ca2+ Exchanger Isoform 3. Rev Physiol Biochem Pharmacol 2015; 168:31-57. [DOI: 10.1007/112_2015_23] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
41
|
A new cell-penetrating peptide that blocks the autoinhibitory XIP domain of NCX1 and enhances antiporter activity. Mol Ther 2014; 23:465-76. [PMID: 25582710 DOI: 10.1038/mt.2014.231] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 11/26/2014] [Indexed: 02/07/2023] Open
Abstract
The plasma membrane Na(+)/Ca(2+) exchanger (NCX) is a high-capacity ionic transporter that exchanges 3Na(+) ions for 1Ca(2+) ion. The first 20 amino acids of the f-loop, named exchanger inhibitory peptide (XIP(NCX1)), represent an autoinhibitory region involved in the Na(+)-dependent inactivation of the exchanger. Previous research has shown that an exogenous peptide having the same amino acid sequence as the XIP(NCX1) region exerts an inhibitory effect on NCX activity. In this study, we identified another regulatory peptide, named P1, which corresponds to the 562-688aa region of the exchanger. Patch-clamp analysis revealed that P1 increased the activity of the exchanger, whereas the XIP inhibited it. Furthermore, P1 colocalized with NCX1 thus suggesting a direct binding interaction. In addition, site-directed mutagenesis experiments revealed that the binding and the stimulatory effect of P1 requires a functional XIP(NCX1) domain on NCX1 thereby suggesting that P1 increases the exchanger activity by counteracting the action of this autoinhibitory sequence. Taken together, these results open a new strategy for developing peptidomimetic compounds that, by mimicking the functional pharmacophore of P1, might increase NCX1 activity and thus exert a therapeutic action in those diseases in which an increase in NCX1 activity might be helpful.
Collapse
|
42
|
Secondo A, Esposito A, Sirabella R, Boscia F, Pannaccione A, Molinaro P, Cantile M, Ciccone R, Sisalli MJ, Scorziello A, Di Renzo G, Annunziato L. Involvement of the Na+/Ca2+ exchanger isoform 1 (NCX1) in neuronal growth factor (NGF)-induced neuronal differentiation through Ca2+-dependent Akt phosphorylation. J Biol Chem 2014; 290:1319-31. [PMID: 25416782 DOI: 10.1074/jbc.m114.555516] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
NGF induces neuronal differentiation by modulating [Ca(2+)]i. However, the role of the three isoforms of the main Ca(2+)-extruding system, the Na(+)/Ca(2+) exchanger (NCX), in NGF-induced differentiation remains unexplored. We investigated whether NCX1, NCX2, and NCX3 isoforms could play a relevant role in neuronal differentiation through the modulation of [Ca(2+)]i and the Akt pathway. NGF caused progressive neurite elongation; a significant increase of the well known marker of growth cones, GAP-43; and an enhancement of endoplasmic reticulum (ER) Ca(2+) content and of Akt phosphorylation through an early activation of ERK1/2. Interestingly, during NGF-induced differentiation, the NCX1 protein level increased, NCX3 decreased, and NCX2 remained unaffected. At the same time, NCX total activity increased. Moreover, NCX1 colocalized and coimmunoprecipitated with GAP-43, and NCX1 silencing prevented NGF-induced effects on GAP-43 expression, Akt phosphorylation, and neurite outgrowth. On the other hand, the overexpression of its neuronal splicing isoform, NCX1.4, even in the absence of NGF, induced an increase in Akt phosphorylation and GAP-43 protein expression. Interestingly, tetrodotoxin-sensitive Na(+) currents and 1,3-benzenedicarboxylic acid, 4,4'-[1,4,10-trioxa-7,13-diazacyclopentadecane-7,13-diylbis(5-methoxy-6,12-benzofurandiyl)]bis-, tetrakis[(acetyloxy)methyl] ester-detected [Na(+)]i significantly increased in cells overexpressing NCX1.4 as well as ER Ca(2+) content. This latter effect was prevented by tetrodotoxin. Furthermore, either the [Ca(2+)]i chelator(1,2-bis(o-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid) (BAPTA-AM) or the PI3K inhibitor LY 294002 prevented Akt phosphorylation and GAP-43 protein expression rise in NCX1.4 overexpressing cells. Moreover, in primary cortical neurons, NCX1 silencing prevented Akt phosphorylation, GAP-43 and MAP2 overexpression, and neurite elongation. Collectively, these data show that NCX1 participates in neuronal differentiation through the modulation of ER Ca(2+) content and PI3K signaling.
Collapse
Affiliation(s)
- Agnese Secondo
- From the Department of Neuroscience and Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy and
| | - Alba Esposito
- From the Department of Neuroscience and Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy and
| | - Rossana Sirabella
- the Fondazione Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) SDN, Naples 80143, Italy
| | - Francesca Boscia
- From the Department of Neuroscience and Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy and
| | - Anna Pannaccione
- From the Department of Neuroscience and Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy and
| | - Pasquale Molinaro
- From the Department of Neuroscience and Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy and
| | - Maria Cantile
- From the Department of Neuroscience and Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy and
| | - Roselia Ciccone
- From the Department of Neuroscience and Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy and
| | - Maria Josè Sisalli
- From the Department of Neuroscience and Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy and
| | - Antonella Scorziello
- From the Department of Neuroscience and Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy and
| | - Gianfranco Di Renzo
- From the Department of Neuroscience and Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy and
| | - Lucio Annunziato
- From the Department of Neuroscience and Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples 80131, Italy and the Fondazione Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) SDN, Naples 80143, Italy
| |
Collapse
|
43
|
MicroRNA-103-1 selectively downregulates brain NCX1 and its inhibition by anti-miRNA ameliorates stroke damage and neurological deficits. Mol Ther 2014; 22:1829-38. [PMID: 24954474 DOI: 10.1038/mt.2014.113] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 06/12/2014] [Indexed: 12/31/2022] Open
Abstract
Na(+)/Ca2+ exchanger (NCX) is a plasma membrane transporter that, by regulating Ca2+ and Na(+) homeostasis, contributes to brain stroke damage. The objectives of this study were to investigate whether there might be miRNAs in the brain able to regulate NCX1 expression and, thereafter, to set up a valid therapeutic strategy able to reduce stroke-induced brain damage by regulating NCX1 expression. Thus, we tested whether miR-103-1, a microRNA belonging to the miR-103/107 family that on the basis of sequence analysis might be a potential NCX1 regulator, could control NCX1 expression. The role of miR-103-1 was assessed in a rat model of transient cerebral ischemia by evaluating the effect of the correspondent antimiRNA on both brain infarct volume and neurological deficits. NCX1 expression was dramatically reduced when cortical neurons were exposed to miR-103-1. This alleged tight regulation of NCX1 by miR-103-1 was further corroborated by luciferase assay. Notably, antimiR-103-1 prevented NCX1 protein downregulation induced by the increase in miR-103-1 after brain ischemia, thereby reducing brain damage and neurological deficits. Overall, the identification of a microRNA able to selectively regulate NCX1 in the brain clarifies a new important molecular mechanism of NCX1 regulation in the brain and offers the opportunity to develop a new therapeutic strategy for stroke.
Collapse
|
44
|
Sisalli MJ, Secondo A, Esposito A, Valsecchi V, Savoia C, Di Renzo GF, Annunziato L, Scorziello A. Endoplasmic reticulum refilling and mitochondrial calcium extrusion promoted in neurons by NCX1 and NCX3 in ischemic preconditioning are determinant for neuroprotection. Cell Death Differ 2014; 21:1142-9. [PMID: 24632945 DOI: 10.1038/cdd.2014.32] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 01/15/2014] [Accepted: 02/04/2014] [Indexed: 01/12/2023] Open
Abstract
Ischemic preconditioning (IPC), an important endogenous adaptive mechanism of the CNS, renders the brain more tolerant to lethal cerebral ischemia. The molecular mechanisms responsible for the induction and maintenance of ischemic tolerance in the brain are complex and still remain undefined. Considering the increased expression of the two sodium calcium exchanger (NCX) isoforms, NCX1 and NCX3, during cerebral ischemia and the relevance of nitric oxide (NO) in IPC modulation, we investigated whether the activation of the NO/PI3K/Akt pathway induced by IPC could regulate calcium homeostasis through changes in NCX1 and NCX3 expression and activity, thus contributing to ischemic tolerance. To this aim, we set up an in vitro model of IPC by exposing cortical neurons to a 30-min oxygen and glucose deprivation (OGD) followed by 3-h OGD plus reoxygenation. IPC was able to stimulate NCX activity, as revealed by Fura-2AM single-cell microfluorimetry. This effect was mediated by the NO/PI3K/Akt pathway since it was blocked by the following: (a) the NOS inhibitors L-NAME and 7-Nitroindazole, (b) the IP3K/Akt inhibitors LY294002, wortmannin and the Akt-negative dominant, (c) the NCX1 and NCX3 siRNA. Intriguingly, this IPC-mediated upregulation of NCX1 and NCX3 activity may control calcium level within endoplasimc reticulum (ER) and mitochondria, respectively. In fact, IPC-induced NCX1 upregulation produced an increase in ER calcium refilling since this increase was prevented by siNCX1. Moreover, by increasing NCX3 activity, IPC reduced mitochondrial calcium concentration. Accordingly, the inhibition of NCX by CGP37157 reverted this effect, thus suggesting that IPC-induced NCX3-increased activity may improve mitochondrial function during OGD/reoxygenation. Collectively, these results indicate that IPC-induced neuroprotection may occur through the modulation of calcium homeostasis in ER and mitochondria through NO/PI3K/Akt-mediated NCX1 and NCX3 upregulation.
Collapse
Affiliation(s)
- M J Sisalli
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples - National Institute of Neuroscience, Naples, Italy
| | - A Secondo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples - National Institute of Neuroscience, Naples, Italy
| | - A Esposito
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples - National Institute of Neuroscience, Naples, Italy
| | - V Valsecchi
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples - National Institute of Neuroscience, Naples, Italy
| | - C Savoia
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples - National Institute of Neuroscience, Naples, Italy
| | - G F Di Renzo
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples - National Institute of Neuroscience, Naples, Italy
| | - L Annunziato
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples - National Institute of Neuroscience, Naples, Italy
| | - A Scorziello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples - National Institute of Neuroscience, Naples, Italy
| |
Collapse
|
45
|
Michel LYM, Verkaart S, Koopman WJH, Willems PHGM, Hoenderop JGJ, Bindels RJM. Function and regulation of the Na+-Ca2+ exchanger NCX3 splice variants in brain and skeletal muscle. J Biol Chem 2014; 289:11293-11303. [PMID: 24616101 DOI: 10.1074/jbc.m113.529388] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Isoform 3 of the Na(+)-Ca(2+) exchanger (NCX3) is crucial for maintaining intracellular calcium ([Ca(2+)]i) homeostasis in excitable tissues. In this sense NCX3 plays a key role in neuronal excitotoxicity and Ca(2+) extrusion during skeletal muscle relaxation. Alternative splicing generates two variants (NCX3-AC and NCX3-B). Here, we demonstrated that NCX3 variants display a tissue-specific distribution in mice, with NCX3-B as mostly expressed in brain and NCX-AC as predominant in skeletal muscle. Using Fura-2-based Ca(2+) imaging, we measured the capacity and regulation of the two variants during Ca(2+) extrusion and uptake in different conditions. Functional studies revealed that, although both variants are activated by intracellular sodium ([Na(+)]i), NCX3-AC has a higher [Na(+)]i sensitivity, as Ca(2+) influx is observed in the presence of extracellular Na(+). This effect could be partially mimicked for NCX3-B by mutating several glutamate residues in its cytoplasmic loop. In addition, NCX3-AC displayed a higher capacity of both Ca(2+) extrusion and uptake compared with NCX3-B, together with an increased sensitivity to intracellular Ca(2+). Strikingly, substitution of Glu(580) in NCX3-B with its NCX3-AC equivalent Lys(580) recapitulated the functional properties of NCX3-AC regarding Ca(2+) sensitivity, Lys(580) presumably acting through a structure stabilization of the Ca(2+) binding site. The higher Ca(2+) uptake capacity of NCX3-AC compared with NCX3-B is in line with the necessity to restore Ca(2+) levels in the sarcoplasmic reticulum during prolonged exercise. The latter result, consistent with the high expression in the slow-twitch muscle, suggests that this variant may contribute to the Ca(2+) handling beyond that of extruding Ca(2+).
Collapse
Affiliation(s)
- Lauriane Y M Michel
- From the Departments of Physiology and Radboud University Medical Centre, 6500HB Nijmegen, The Netherlands; Centre for System Biology and Bioenergetics, Radboud University Medical Centre, 6500HB Nijmegen, The Netherlands
| | - Sjoerd Verkaart
- From the Departments of Physiology and Radboud University Medical Centre, 6500HB Nijmegen, The Netherlands
| | - Werner J H Koopman
- Centre for System Biology and Bioenergetics, Radboud University Medical Centre, 6500HB Nijmegen, The Netherlands; Departments of Biochemistry, Radboud University Medical Centre, 6500HB Nijmegen, The Netherlands
| | - Peter H G M Willems
- Centre for System Biology and Bioenergetics, Radboud University Medical Centre, 6500HB Nijmegen, The Netherlands; Departments of Biochemistry, Radboud University Medical Centre, 6500HB Nijmegen, The Netherlands
| | - Joost G J Hoenderop
- From the Departments of Physiology and Radboud University Medical Centre, 6500HB Nijmegen, The Netherlands
| | - René J M Bindels
- From the Departments of Physiology and Radboud University Medical Centre, 6500HB Nijmegen, The Netherlands; Centre for System Biology and Bioenergetics, Radboud University Medical Centre, 6500HB Nijmegen, The Netherlands.
| |
Collapse
|
46
|
Calcium/Calmodulin-Dependent Protein Kinase II and Its Endogenous Inhibitor α in Medullary Thyroid Cancer. Clin Cancer Res 2014; 20:1513-20. [DOI: 10.1158/1078-0432.ccr-13-1683] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
47
|
Does Na⁺/Ca²⁺ exchanger, NCX, represent a new druggable target in stroke intervention? Transl Stroke Res 2013; 5:145-55. [PMID: 24323727 DOI: 10.1007/s12975-013-0308-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 10/15/2013] [Accepted: 11/06/2013] [Indexed: 12/22/2022]
Abstract
Stroke causes a rapid cell death in the core of the injured region and triggers mechanisms in surrounding penumbra area that leads to changes in concentrations of several ions like intracellular Ca²⁺, Na⁺, H⁺, K⁺, and radicals such as reactive oxygen species and reactive nitrogen species. When a dysregulation of homeostasis of these messengers occurs, it can trigger cell death. In particular, it is widely accepted that a critical factor in determining neuronal death during cerebral ischemia is progressive dysregulation of Ca²⁺, Na⁺, K⁺, and H⁺ homeostasis that activate several death pathways, including oxidative and nitrosative stress, mitochondrial dysfunction, protease activation, and apoptosis. In the last decade, several seminal experimental works are markedly changing the scenario of research of principal players of an ischemic event. Indeed, some plasma membrane channels and transporters, involved in the control of Ca²⁺, Na⁺, K⁺, and H⁺ ion influx or efflux and, therefore, responsible for maintaining the homeostasis of these four cations, might function as crucial players in initiation of brain ischemic process. Indeed, these proteins, by regulating ionic homeostasis, may provide the molecular basis underlying glutamate-independent Ca²⁺ and Na⁺ overload mechanisms in neuronal ischemic cell death and, most importantly, may represent more suitable molecular targets for therapeutic intervention. Recently, a great deal of interest has been devoted to clarify the role of the plasma membrane protein known as Na⁺/Ca²⁺ exchanger, a transporter able to control Na⁺ and Ca²⁺ homeostasis. In this review, the pathophysiological role of NCX and its implication as a potential target in stroke intervention will be examined.
Collapse
|
48
|
Scorziello A, Savoia C, Sisalli MJ, Adornetto A, Secondo A, Boscia F, Esposito A, Polishchuk EV, Polishchuk RS, Molinaro P, Carlucci A, Lignitto L, Di Renzo G, Feliciello A, Annunziato L. NCX3 regulates mitochondrial Ca(2+) handling through the AKAP121-anchored signaling complex and prevents hypoxia-induced neuronal death. J Cell Sci 2013; 126:5566-77. [PMID: 24101730 DOI: 10.1242/jcs.129668] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The mitochondrial influx and efflux of Ca(2+) play a relevant role in cytosolic and mitochondrial Ca(2+) homeostasis, and contribute to the regulation of mitochondrial functions in neurons. The mitochondrial Na(+)/Ca(2+) exchanger, which was first postulated in 1974, has been primarily investigated only from a functional point of view, and its identity and localization in the mitochondria have been a matter of debate over the past three decades. Recently, a Li(+)-dependent Na(+)/Ca(2+) exchanger extruding Ca(2+) from the matrix has been found in the inner mitochondrial membrane of neuronal cells. However, evidence has been provided that the outer membrane is impermeable to Ca(2+) efflux into the cytoplasm. In this study, we demonstrate for the first time that the nuclear-encoded NCX3 isoform (1) is located on the outer mitochondrial membrane (OMM) of neurons; (2) colocalizes and immunoprecipitates with AKAP121 (also known as AKAP1), a member of the protein kinase A anchoring proteins (AKAPs) present on the outer membrane; (3) extrudes Ca(2+) from mitochondria through AKAP121 interaction in a PKA-mediated manner, both under normoxia and hypoxia; and (4) improves cell survival when it works in the Ca(2+) efflux mode at the level of the OMM. Collectively, these results suggest that, in neurons, NCX3 regulates mitochondrial Ca(2+) handling from the OMM through an AKAP121-anchored signaling complex, thus promoting cell survival during hypoxia.
Collapse
Affiliation(s)
- Antonella Scorziello
- Division of Pharmacology, Department of Neuroscience, Reproductive and Dentistry Sciences, School of Medicine, Federico II University of Naples-National Institute of Neuroscience, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Pignataro G, Cuomo O, Vinciguerra A, Sirabella R, Esposito E, Boscia F, Di Renzo G, Annunziato L. NCX as a Key Player in the Neuroprotection Exerted by Ischemic Preconditioning and Postconditioning. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2013; 961:223-40. [DOI: 10.1007/978-1-4614-4756-6_19] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
50
|
Valsecchi V, Pignataro G, Sirabella R, Matrone C, Boscia F, Scorziello A, Sisalli MJ, Esposito E, Zambrano N, Cataldi M, Di Renzo G, Annunziato L. Transcriptional regulation of ncx1 gene in the brain. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2013; 961:137-45. [PMID: 23224876 DOI: 10.1007/978-1-4614-4756-6_12] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The ubiquitous sodium-calcium exchanger isoform 1 (NCX1) is a -bidirectional transporter that plays a relevant role under physiological and pathophysiological conditions including brain ischemia by regulating intraneuronal Ca(2+) and Na(+) homeostasis. Although changes in ncx1 protein and transcript expression have been detected during stroke, its transcriptional regulation is still largely unexplored. Here, we reviewed our recent findings on several transcription factors including cAMP response element-binding protein (CREB), nuclear factor kappa B (NF-κB), and hypoxia-inducible factor-1 (HIF-1) in the control of the ncx1 gene expression in neuronal cells.
Collapse
Affiliation(s)
- Valeria Valsecchi
- Department of Neuroscience, Federico II University of Naples, Naples, Italy
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|