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5. A conducting state with properties of a slow inactivated state in a shaker K(+) channel mutant.

Author

Olcese, R, Sigg, D, Latorre, R, Bezanilla, F, and Stefani, E

Subjects
Oocytes, Animals, Xenopus laevis, Potassium Channels, Artifacts, Patch-Clamp Techniques, Probability, Ion Channel Gating, Mutagenesis, Membrane Potentials, Electric Conductivity, Kinetics, Shaker Superfamily of Potassium Channels, gating current, slow inactivation, C/P-type inactivation, nonstationary noise analysis, Physiology, Medical Physiology
Abstract

In Shaker K(+) channel, the amino terminus deletion Delta6-46 removes fast inactivation (N-type) unmasking a slow inactivation process. In Shaker Delta6-46 (Sh-IR) background, two additional mutations (T449V-I470C) remove slow inactivation, producing a noninactivating channel. However, despite the fact that Sh-IR-T449V-I470C mutant channels remain conductive, prolonged depolarizations (1 min, 0 mV) produce a shift of the QV curve by about -30 mV, suggesting that the channels still undergo the conformational changes typical of slow inactivation. For depolarizations longer than 50 ms, the tail currents measured during repolarization to -90 mV display a slow component that increases in amplitude as the duration of the depolarizing pulse increases. We found that the slow development of the QV shift had a counterpart in the amplitude of the slow component of the ionic tail current that is not present in Sh-IR. During long depolarizations, the time course of both the increase in the slow component of the tail current and the change in voltage dependence of the charge movement could be well fitted by exponential functions with identical time constant of 459 ms. Single channel recordings revealed that after prolonged depolarizations, the channels remain conductive for long periods after membrane repolarization. Nonstationary autocovariance analysis performed on macroscopic current in the T449V-I470C mutant confirmed that a novel open state appears with increasing prepulse depolarization time. These observations suggest that in the mutant studied, a new open state becomes progressively populated during long depolarizations (>50 ms). An appealing interpretation of these results is that the new open state of the mutant channel corresponds to a slow inactivated state of Sh-IR that became conductive.

Published
2001

6. Fast inactivation in Shaker K+ channels. Properties of ionic and gating currents.

Author

Roux, MJ, Olcese, R, Toro, L, Bezanilla, F, and Stefani, E

Subjects
Oocytes, Animals, Xenopus laevis, Ions, Potassium, Potassium Channels, Isotonic Solutions, Electrophysiology, Ion Channel Gating, Electric Conductivity, Models, Biological, Time Factors, Shaker Superfamily of Potassium Channels, gating currents, K+ channels, fast inactivation, charge immobilization, Models, Biological, Physiology, Medical Physiology
Abstract

Fast inactivating Shaker H4 potassium channels and nonconducting pore mutant Shaker H4 W434F channels have been used to correlate the installation and recovery of the fast inactivation of ionic current with changes in the kinetics of gating current known as "charge immobilization" (Armstrong, C.M., and F. Bezanilla. 1977. J. Gen. Physiol. 70:567-590.). Shaker H4 W434F gating currents are very similar to those of the conducting clone recorded in potassium-free solutions. This mutant channel allows the recording of the total gating charge return, even when returning from potentials that would largely inactivate conducting channels. As the depolarizing potential increased, the OFF gating currents decay phase at -90 mV return potential changed from a single fast component to at least two components, the slower requiring approximately 200 ms for a full charge return. The charge immobilization onset and the ionic current decay have an identical time course. The recoveries of gating current (Shaker H4 W434F) and ionic current (Shaker H4) in 2 mM external potassium have at least two components. Both recoveries are similar at -120 and -90 mV. In contrast, at higher potentials (-70 and -50 mV), the gating charge recovers significantly more slowly than the ionic current. A model with a single inactivated state cannot account for all our data, which strongly support the existence of "parallel" inactivated states. In this model, a fraction of the charge can be recovered upon repolarization while the channel pore is occupied by the NH2-terminus region.

Published
1998

7. Effect of bay K 8644 (-) and the beta2a subunit on Ca2+-dependent inactivation in alpha1C Ca2+ channels.

Author

Noceti, F, Olcese, R, Qin, N, Zhou, J, and Stefani, E

Subjects
Oocytes, Heart, Animals, Xenopus laevis, 3-Pyridinecarboxylic acid, 1, 4-dihydro-2, 6-dimethyl-5-nitro-4-(2-(trifluoromethyl)phenyl)-, Methyl ester, Calcium Channels, DNA, Complementary, Calcium Channel Agonists, Electric Stimulation, Electrophysiology, Kinetics, Models, Molecular, In Vitro Techniques, Ca2+ currents, decay, Xenopus, subunit, kinetic model, 3-Pyridinecarboxylic acid, 1, 4-dihydro-2, 6-dimethyl-5-nitro-4-(2-(trifluoromethyl)phenyl)-, Methyl ester, DNA, Complementary, Models, Molecular, Physiology, Medical Physiology
Abstract

Ca2+ currents recorded from Xenopus oocytes expressing only the alpha1C pore-forming subunit of the cardiac Ca2+ channel show Ca2+-dependent inactivation with a single exponential decay. This current-dependent inactivation is not detected for inward Ba2+ currents in external Ba2+. Facilitation of pore opening speeds up the Ca2+-dependent inactivation process and makes evident an initial fast rate of decay. Facilitation can be achieved by (a) coexpression of the beta2a subunit with the alpha1C subunit, or (b) addition of saturating Bay K 8644 (-) concentration to alpha1C channels. The addition of Bay K 8644 (-) to alpha1Cbeta2a channels makes both rates of inactivation faster. All these maneuvers do not induce inactivation in Ba2+ currents in our expression system. These results support the hypothesis of a mechanism for the Ca2+-dependent inactivation process that is sensitive to both Ca2+ flux (single channel amplitude) and open probability. We conclude that the Ca2+ site for inactivation is in the alpha1C pore-forming subunit and we propose a kinetic model to account for the main features of alpha1Cbeta2a Ca2+ currents.

Published
1998

8. Correlation between charge movement and ionic current during slow inactivation in Shaker K+ channels.

Author

Olcese, R, Latorre, R, Toro, L, Bezanilla, F, and Stefani, E

Subjects
Oocytes, Animals, Xenopus laevis, Drosophila, Ions, Potassium Channels, Drosophila Proteins, Electrophysiology, Electric Conductivity, Models, Biological, Female, Shaker Superfamily of Potassium Channels, gating current, potassium current, charge movement, Models, Biological, Physiology, Medical Physiology
Abstract

Prolonged depolarization induces a slow inactivation process in some K+ channels. We have studied ionic and gating currents during long depolarizations in the mutant Shaker H4-Delta(6-46) K+ channel and in the nonconducting mutant (Shaker H4-Delta(6-46)-W434F). These channels lack the amino terminus that confers the fast (N-type) inactivation (Hoshi, T., W.N. Zagotta, and R.W. Aldrich. 1991. Neuron. 7:547-556). Channels were expressed in oocytes and currents were measured with the cut-open-oocyte and patch-clamp techniques. In both clones, the curves describing the voltage dependence of the charge movement were shifted toward more negative potentials when the holding potential was maintained at depolarized potentials. The evidences that this new voltage dependence of the charge movement in the depolarized condition is associated with the process of slow inactivation are the following: (a) the installation of both the slow inactivation of the ionic current and the inactivation of the charge in response to a sustained 1-min depolarization to 0 mV followed the same time course; and (b) the recovery from inactivation of both ionic and gating currents (induced by repolarizations to -90 mV after a 1-min inactivating pulse at 0 mV) also followed a similar time course. Although prolonged depolarizations induce inactivation of the majority of the channels, a small fraction remains non-slow inactivated. The voltage dependence of this fraction of channels remained unaltered, suggesting that their activation pathway was unmodified by prolonged depolarization. The data could be fitted to a sequential model for Shaker K+ channels (Bezanilla, F., E. Perozo, and E. Stefani. 1994. Biophys. J. 66:1011-1021), with the addition of a series of parallel nonconducting (inactivated) states that become populated during prolonged depolarization. The data suggest that prolonged depolarization modifies the conformation of the voltage sensor and that this change can be associated with the process of slow inactivation.

Published
1997

11. The treatment of allergic rhinitis in asthmatic children and adolescents: practical outcomes from the real-world “ControL’Asma” study

Author

Tosca, M.A., primary, Marseglia, G.L., additional, Ciprandi, G., additional, Anastasio, E., additional, Brambilla, I., additional, Caffarelli, C., additional, Chini, L., additional, Ciprandi, R., additional, De Vittori, V., additional, Duse, M., additional, Di Cicco, M.E., additional, Indinnimeo, L., additional, Kantar, A., additional, Leone, M., additional, Licari, A., additional, Marinelli, G., additional, Maio, S., additional, Moschese, V., additional, Olcese, R., additional, Peroni, D.G., additional, Pistorio, A., additional, Salmaso, C., additional, Silvestri, M., additional, and Zicari, A.M., additional

Published
2021
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12. Tracking the motion of the KV1.2 voltage sensor reveals the molecular perturbations caused by a de novo mutation in a case of epilepsy

Author

Pantazis, A., Kaneko, M., Angelini, M., Steccanella, F., Westerlund, Annie M., Lindström, S. H., Nilsson, M., Delemotte, Lucie, Saitta, S. C., Olcese, R., Pantazis, A., Kaneko, M., Angelini, M., Steccanella, F., Westerlund, Annie M., Lindström, S. H., Nilsson, M., Delemotte, Lucie, Saitta, S. C., and Olcese, R.

Abstract

Key points: KV1.2 channels, encoded by the KCNA2 gene, regulate neuronal excitability by conducting K+ upon depolarization. A new KCNA2 missense variant was discovered in a patient with epilepsy, causing amino acid substitution F302L at helix S4, in the KV1.2 voltage-sensing domain. Immunocytochemistry and flow cytometry showed that F302L does not impair KCNA2 subunit surface trafficking. Molecular dynamics simulations indicated that F302L alters the exposure of S4 residues to membrane lipids. Voltage clamp fluorometry revealed that the voltage-sensing domain of KV1.2-F302L channels is more sensitive to depolarization. Accordingly, KV1.2-F302L channels opened faster and at more negative potentials; however, they also exhibited enhanced inactivation: that is, F302L causes both gain- and loss-of-function effects. Coexpression of KCNA2-WT and -F302L did not fully rescue these effects. The proband's symptoms are more characteristic of patients with loss of KCNA2 function. Enhanced KV1.2 inactivation could lead to increased synaptic release in excitatory neurons, steering neuronal circuits towards epilepsy. Abstract: An exome-based diagnostic panel in an infant with epilepsy revealed a previously unreported de novo missense variant in KCNA2, which encodes voltage-gated K+ channel KV1.2. This variant causes substitution F302L, in helix S4 of the KV1.2 voltage-sensing domain (VSD). F302L does not affect KCNA2 subunit membrane trafficking. However, it does alter channel functional properties, accelerating channel opening at more hyperpolarized membrane potentials, indicating gain of function. F302L also caused loss of KV1.2 function via accelerated inactivation onset, decelerated recovery and shifted inactivation voltage dependence to more negative potentials. These effects, which are not fully rescued by coexpression of wild-type and mutant KCNA2 subunits, probably result from the enhancement of VSD function, as demonstrated by optically tracking VSD depolarization-evoked, QC 20201117

Published
2020
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13. Consensus statement of the Italian society of pediatric allergy and immunology for the pragmatic management of children and adolescents with allergic or immunological diseases during the COVID-19 pandemic

Author

Cardinale, F, Ciprandi, G, Barberi, S, Bernardini, R, Caffarelli, C, Calvani, M, Cavagni, G, Galli, E, Minasi, D, Del Giudice, M, Moschese, V, Novembre, E, Paravati, F, Peroni, D, Tosca, M, Traina, G, Tripodi, S, Marseglia, G, Amato, D, Anania, C, Anastasio, E, Antignani, R, Arasi, S, Baldassarre, M, Baldo, E, Barbalace, A, Barni, S, Betti, F, Bianchi, A, Bolzacchini, E, Bonini, M, Bottau, P, Bozzetto, S, Brighetti, M, Caimmi, D, Caimmi, S, Calzone, L, Cancrini, C, Caminiti, L, Capata, G, Capra, L, Capristo, C, Carboni, E, Carella, F, Castagnoli, R, Chiappini, E, Chiera, F, Chinellato, I, Chini, L, Cipriani, F, Civitelli, F, Comberiati, P, Contini, D, Corrente, S, Cravidi, C, Crisafulli, G, Cuomo, B, D'Auria, E, D'Elios, S, Decimo, F, Giustina, A, Piane, R, De Filippo, M, De Vittori, V, Diaferio, L, Di Mauro, M, Duse, M, Federici, S, Felice, G, Fenu, G, Ferrante, G, Foti, T, Franceschini, F, Ghiglioni, D, Giardino, G, Giovannini, M, Indirli, G, Indolfi, C, Landi, M, La Torre, F, Leone, L, Licari, A, Liotti, L, Lougaris, V, Maiello, N, Mantecca, P, Manti, S, Mariani, M, Martelli, A, Mastrorilli, C, Mastrorilli, V, Montin, D, Mori, F, Olcese, R, Ottaviano, G, Paglialunga, C, Pajno, G, Parisi, G, Pattini, S, Pecoraro, L, Pelosi, U, Pignata, C, Ricci, G, Ricci, S, Rizzi, S, Rizzo, C, Rosati, S, Rosso, P, Sangerardi, M, Santoro, A, Saretta, F, Sarti, L, Sartorio, M, Sgruletti, M, Soresina, A, Sfika, I, Sgrulletti, M, Tesse, N, Tranchino, V, Travaglini, A, Velia, M, Verduci, E, Vernich, M, Veronelli, E, Volpi, S, Votto, M, Zicari, A, Cardinale, F, Ciprandi, G, Barberi, S, Bernardini, R, Caffarelli, C, Calvani, M, Cavagni, G, Galli, E, Minasi, D, Del Giudice, M, Moschese, V, Novembre, E, Paravati, F, Peroni, D, Tosca, M, Traina, G, Tripodi, S, Marseglia, G, Amato, D, Anania, C, Anastasio, E, Antignani, R, Arasi, S, Baldassarre, M, Baldo, E, Barbalace, A, Barni, S, Betti, F, Bianchi, A, Bolzacchini, E, Bonini, M, Bottau, P, Bozzetto, S, Brighetti, M, Caimmi, D, Caimmi, S, Calzone, L, Cancrini, C, Caminiti, L, Capata, G, Capra, L, Capristo, C, Carboni, E, Carella, F, Castagnoli, R, Chiappini, E, Chiera, F, Chinellato, I, Chini, L, Cipriani, F, Civitelli, F, Comberiati, P, Contini, D, Corrente, S, Cravidi, C, Crisafulli, G, Cuomo, B, D'Auria, E, D'Elios, S, Decimo, F, Giustina, A, Piane, R, De Filippo, M, De Vittori, V, Diaferio, L, Di Mauro, M, Duse, M, Federici, S, Felice, G, Fenu, G, Ferrante, G, Foti, T, Franceschini, F, Ghiglioni, D, Giardino, G, Giovannini, M, Indirli, G, Indolfi, C, Landi, M, La Torre, F, Leone, L, Licari, A, Liotti, L, Lougaris, V, Maiello, N, Mantecca, P, Manti, S, Mariani, M, Martelli, A, Mastrorilli, C, Mastrorilli, V, Montin, D, Mori, F, Olcese, R, Ottaviano, G, Paglialunga, C, Pajno, G, Parisi, G, Pattini, S, Pecoraro, L, Pelosi, U, Pignata, C, Ricci, G, Ricci, S, Rizzi, S, Rizzo, C, Rosati, S, Rosso, P, Sangerardi, M, Santoro, A, Saretta, F, Sarti, L, Sartorio, M, Sgruletti, M, Soresina, A, Sfika, I, Sgrulletti, M, Tesse, N, Tranchino, V, Travaglini, A, Velia, M, Verduci, E, Vernich, M, Veronelli, E, Volpi, S, Votto, M, and Zicari, A

Abstract

The COVID-19 pandemic has surprised the entire population. The world has had to face an unprecedented pandemic. Only, Spanish flu had similar disastrous consequences. As a result, drastic measures (lockdown) have been adopted worldwide. Healthcare service has been overwhelmed by the extraordinary influx of patients, often requiring high intensity of care. Mortality has been associated with severe comorbidities, including chronic diseases. Patients with frailty were, therefore, the victim of the SARS-COV-2 infection. Allergy and asthma are the most prevalent chronic disorders in children and adolescents, so they need careful attention and, if necessary, an adaptation of their regular treatment plans. Fortunately, at present, young people are less suffering from COVID-19, both as incidence and severity. However, any age, including infancy, could be affected by the pandemic. Based on this background, the Italian Society of Pediatric Allergy and Immunology has felt it necessary to provide a Consensus Statement. This expert panel consensus document offers a rationale to help guide decision-making in the management of children and adolescents with allergic or immunologic diseases.

Published
2020

18. The practical clinical relevance of rhinitis classification in children with asthma: outcomes of the 'ControL'Asma' study

Author

Tosca, Ma, Duse, M, Marseglia, G, Ciprandi, G, Anastasio, E, Brambilla, I, Caffarelli, C, Chini, L, Ciprandi, R, Del Barba, P, De Vittori, V, Di Cicco, Me, Indinnimeo, L, Kantar, A, Leone, M, Licari, A, Moschese, V, Olcese, R, Peroni, D, Pistorio, A, Silvestri, M, and Zicari, Am

Subjects
Male, Phenotype, Adolescent, Humans, Asthma, Child, Comorbidity, Female, Rhinitis, Severity of Illness Index, Settore MED/38
Published
2019

19. Voltage-controlled gating in a large conductance Ca2+-sensitive K+ channel (hslo)

Author

Stefani, E., Ottolia, M., Noceti, F., Olcese, R., Wallner, M., Latorre, R., and Toro, L.

Subjects
Potassium channels -- Physiological aspects, Plasma membranes -- Physiological aspects, Calcium ions -- Physiological aspects, Science and technology
Abstract

Large conductance calcium- and voltage-sensitive [K.sup.+] (MaxiK) channels share properties of voltage-and ligand-gated ion channels. In voltage-gated channels, membrane depolarization promotes the displacement of charged residues contained in the voltage sensor (S4 region) inducing gating currents and pore opening. In MaxiK channels, both voltage and micromolar internal [Ca.sup.2+] favor pore opening. We demonstrate the presence of voltage sensor rearrangements with voltage (gating currents) whose movement and associated pore opening is triggered by voltage and facilitated by micromolar internal [Ca.sup.2+] concentration. In contrast to other voltage-gated channels, in MaxiK channels there is charge movement at potentials where the pore is open and the total charge per channel is 4-5 elementary charges.

Published
1997

23. Abstracts from the Food Allergy and Anaphylaxis Meeting 2016

Author

Pouessel, G, Claverie, C, Labreuche, J, Renaudin, J-M, Dorkenoo, A, Eb, M, Moneret-Vautrin, A, Deschildre, A, Leteurtre, S, Grabenhenrich, L, Worm, M, Dölle, S, Scherer, K, Hutteger, I, Christensen, M, Bindslev-Jensen, C, Mortz, C, Eller, E, Kjaer, HF, Carneiro-Leão, L, Badas, J, Coimbra, A, Levy, DP, Ben-Shoshan, M, Rimon, A, Benor, S, Arends, NJT, Edelbroek, N, de Groot, H, Emons, JAM, Brand, HKA, Verhoeven, D, van Veen, LN, de Jong, NW, Noh, G, Jang, EH, Pascal, M, Dominguez, O, Piquer, M, Alvaro, M, Jimenez-Feijoo, R, Lozano, J, Machinena, A, del Mar Folqué, M, Giner, MT, Plaza, AM, Turner, P, Patel, N, Vazquez-Ortiz, M, Lindsley, S, Walker, L, Rosenberg, S, Mari, A, Alessandri, C, Giangrieco, I, Tuppo, L, Rafaiani, C, Mitterer, G, Ciancamerla, M, Ferrara, R, Bernardi, ML, Zennaro, D, Tamburrini, M, Ciardiello, MA, Harwanegg, C, Fernandez, A, Selb, R, Egenmann, P, Epstein, M, Hoffmann-Sommergruber, K, Koning, F, Lovik, M, Clare Mills, EN, Moreno, J, van Loveren, H, Wal, J-M, Diesner, S, Bergmayr, C, Pfitzner, B, Assmann, VE, Starkl, P, Endesfelder, D, Eiwegger, T, Szepfalusi, Z, Fehrenbach, H, Jensen-Jarolim, E, Hartmann, A, Pali-Schöll, I, Untersmayr, E, Wille, S, Meyer, P, Klingebiel, C, Lidholm, J, Ehrenberg, A, Östling, J, Cleach, I, Mège, J-L, Vitte, J, Aina, R, Dubiela, P, Pfeifer, S, Bublin, M, Radauer, C, Humeniuk, P, Kabasser, S, Asero, R, Bogas, G, Gomez, F, Campo, P, Salas, M, Doña, I, Barrionuevo, E, Guerrero, MA, Mayorga, C, Prieto, A, Barber, D, Torres, MJ, Jamin, A, Wangorsch, A, Ballmer, B, Vieths, S, Scheurer, S, Apostolovic, D, Mihailovic, J, Krstic, M, Starkhammar, M, Velickovic, TC, Hamsten, C, van Hage, M, van Erp, FC, Knol, EF, Kansen, HM, Pontoppidan, B, Meijer, Y, van der Ent, CK, Knulst, AC, Sayers, R, Brown, H, Custovic, A, Simpson, A, Mills, C, Schulz, J, Akkerdaas, J, Totis, M, Capt, A, Herouet-Guicheney, C, van Ree, R, Banerjee, T, Banerjee, A, Claude, M, Bouchaud, G, Lupi, R, Castan, L, Tranquet, O, Denery-Papini, S, Bodinier, M, Brossard, C, De Poi, R, Gritti, E, De Dominicis, E, Popping, B, de Laureto, PP, Palosuo, K, Kukkonen, AK, Pelkonen, A, Mäkelä, M, Lee, NA, Rost, J, Muralidharan, S, Campbell, D, Mehr, S, Nock, C, Baumert, J, Taylor, S, Mastrorilli, C, Tripodi, S, Caffarelli, C, Perna, S, Di Rienzo Businco, A, Sfika, I, Dondi, A, Bianchi, A, Dascola, CP, Ricci, G, Cipriani, F, Maiello, N, del Giudice, MM, Frediani, T, Frediani, S, Macrì, F, Pistoletti, C, Iacono, ID, Patria, MF, Varin, E, Peroni, D, Comberiati, P, Chini, L, Moschese, V, Lucarelli, S, Bernardini, R, Pingitore, G, Pelosi, U, Olcese, R, Moretti, M, Cirisano, A, Faggian, D, Travaglini, A, Plebani, M, Verga, MC, Calvani, M, Giordani, P, Matricardi, PM, Ontiveros, N, Cabrera-Chavez, F, Galand, J, Beaudouin, E, Pineau, F, Sakai, S, Matsunaga, K, Teshima, R, Larré, C, Denery, S, Tschirner, S, Trendelenburg, V, Schulz, G, Niggemann, B, Beyer, K, Bouferkas, Y, Belabbas, Y, Saidi, D, Kheroua, O, Mecherfi, KEE, Guendouz, M, Haddi, A, Kaddouri, H, Amaral, L, Pereira, A, Rodrigues, S, Datema, M, Jongejan, L, Clausen, M, Knulst, A, Papadopoulos, N, Kowalski, M, de Blay, F, Zwinderman, A, Hoffman-Sommergruber, K, Ballmer-Weber, B, Fernandez-Rivas, M, Deng, S, Yin, J, Eisenmann, C, Nassiri, M, Reinert, R, van der Valk, JPM, van Wijk, RG, Vergouwe, Y, Steyerberg, EW, Reitsma, M, Wichers, HJ, Savelkoul, HFJ, Vlieg-Boerstra, B, Dubois, AEJ, Carolino, F, Rodolfo, A, Cernadas, J, Roa-Medellín, D, Rodriguez-Fernandez, A, Navarro, J, Albendiz, V, Baeza, ML, Intente-Herrero, S, Mikkelsen, A, Mehlig, K, Lissner, L, Verrill, L, Luccioli, S, van Bilsen, J, Kuper, F, Wolterbeek, A, Rankouhi, TR, Verschuren, L, Cnossen, H, Jeurink, P, Garssen, J, Knippels, L, Garthoff, J, Houben, G, Leeman, W, Eleonore Pettersson, M, Schins, AMM, Koppelman, GH, Kollen, BJ, Zubchenko, S, Kuntz, S, Mérida, P, Álvaro, M, Riggioni, C, Castellanos, JH, Jimenez, R, Cap, M, Drumez, E, Lejeune, S, Thumerelle, C, Mordacq, C, Nève, V, Ricò, S, Varini, M, Nocerino, R, Cosenza, L, Amoroso, A, Di Costanzo, M, Di Scala, C, Bedogni, G, Canani, RB, Turner, PJ, Poza-Guedes, P, González-Pérez, R, Sánchez-Machín, I, Matheu-Delgado, V, Wambre, E, Ballegaard, A-S, Madsen, C, Gregersen, J, Bøgh, KL, Aubert, P, Neunlist, M, Magnan, A, Lozano-Ojalvo, D, Pablos-Tanarro, A, Pérez-Rodríguez, L, Molina, E, López-Fandiño, R, Rekima, A, Macchiaverni, P, Turfkruyer, M, Holvoet, S, Dupuis, L, Baiz, N, Annesi-Maesano, I, Mercenier, A, Nutten, S, Verhasselt, V, Mrakovcic-Sutic, I, Banac, S, Sutic, I, Baricev-Novakovic, Z, Pavisic, V, Muñoz-Cano, R, Jiménez-Rodríguez, T, Corbacho, D, Roca-Ferrer, J, Bartra, J, Bulog, A, Micovic, V, Markiewicz, L, Szymkiewicz, A, Szyc, A, Wróblewska, B, Harvey, BM, Harthoorn, LF, Wesley Burks, A, Rentzos, G, Björk, A-LB, Bengtsson, U, Barber, C, Kalicinsky, C, Breynaert, C, Coorevits, L, Jansen, C, Van Hoeyveld, E, Verbeke, K, Kochuyt, A-M, Schrijvers, R, Deleanu, D, Muntean, A, Konstantakopoulou, M, Pasioti, M, Papadopoulou, A, Iliopoulou, A, Mikos, N, Kompoti, E, de Castro, ED, Bartalomé, B, Ue, KL, Griffiths, E, Till, S, Grimshaw, K, Roberts, G, Selby, A, Butiene, I, Larco, JI, Dubakiene, R, Fiandor, A, Fiocchi, A, Sigurdardottir, S, Sprikkelman, A, Schoemaker, A-F, Xepapadaki, P, Keil, T, Cojocariu, Z, Barbado, BS, Iancu, V, Arroabarren, E, Esarte, MG, Arteaga, M, Andrade, MC, Borges, D, Kalil, J, Bianchi, PG, Agondi, RC, Gupta, RK, Sharma, A, Gupta, K, Das, M, Dwivedi, P, Karseladze, R, Jorjoliani, L, Saginadze, L, Tskhakaia, M, Basello, K, Piuri, G, Speciani, AF, Speciani, MC, Camerotto, C, Zinno, F, Pakholchuk, O, Nedelska, S, Pattini, S, Costantino, MT, Peveri, S, Villalta, D, Savi, E, Costanzi, A, Revyakina, VA, Kiseleva, MA, Kuvshinova, ED, Larkova, IA, Shekhetov, AA, Silva, D, Moreira, A, Plácido, J, van der Kleij, H, van Twuijver, E, Sutorius, R, de Kam, P-J, van Odijk, J, Lindqvist, H, Lustig, E, Jácome, AAA, Aguilar, KLB, Domínguez, MG, Hernández, DAM, Caruso, C, Casale, C, Rapaccini, GL, Romano, A, De 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J, Dubois, A, de Jong, N, Matsyura, O, Besh, L, Huang, C-H, Jan, T-R, Stiefel, G, Tratt, J, Kirk, K, Arasi, S, Caminiti, L, Crisafulli, G, Fiamingo, C, Fresta, J, Pajno, G, Remington, B, Kruizinga, A, Marty Blom, W, Westerhout, J, Bijlsma, S, Blankestijn, M, Otten, H, Klemans, R, Michelsen-Huisman, AD, van Os-Medendorp, H, Kruizinga, AG, Versluis, A, van Duijn, G, de Zeeuw-Brouwer, HM-L, Castenmiller, JJM, Noteborn, HPJM, Houben, GF, Bravin, K, Luyt, D, Javed, B, Couch, P, Munro, C, Padfield, P, Sperrin, M, Byrne, A, Oosthuizen, L, Kelleher, C, Ward, F, Brosnan, N, King, G, Corbet, E, Guzmán, JAH, García, MB, Asensio, O, Navarrete, LV, Larramona, H, Miró, XD, Pyrz, K, Austin, M, Boloh, Y, Galloway, D, Hernandez, P, Hourihane, JOB, Kenna, F, Majkowska-Wojciechowska, B, Regent, L, Themisb, M, Schnadt, S, Semic-Jusufagic, A, Galvin, AD, Kauppila, T, Kuitunen, M, Kitsioulis, NA, Douladiris, N, Kostoudi, S, Manolaraki, I, Mitsias, D, Manousakis, E, Papadopoulos, NG, Knibb, R, Hammond, J, Cooke, R, Yrjänä, J, Hanni, A-M, Vähäsarja, P, Mustonen, O, Dunder, T, Kulmala, P, Lasa, E, D’Amelio, C, Martínez, S, Joral, A, Gastaminza, G, Goikoetxea, MJ, Candy, DCA, Van Ampting, MTJ, Oude Nijhuis, MM, Butt, AM, Peroni, DG, Fox, AT, Knol, J, Michaelis, LJ, Padua, I, Padrao, P, Moreira, P, Barros, R, Sharif, H, Ahmed, M, Gomaa, N, Mens, J, Smit, K, Timmermans, F, Poredoš, T, Jeverica, AK, Sedmak, M, Benedik, E, Accetto, M, Zupančič, M, Yonamine, G, Soldateli, G, Aquilante, B, Pastorino, AC, de Moraes Beck, CL, Gushken, AK, de Barros Dorna, M, dos Santos, CN, Castro, APM, Al-Qahtani, A, Arnaout, R, Khaliq, AR, Amin, R, Sheikh, F, Alvarez, J, Anda, M, Palacios, M, De Prada, M, Ponce, C, Balbino, B, Sibilano, R, Marichal, T, Gaudenzio, N, Karasuyama, H, Bruhns, P, Tsai, M, Reber, LL, Galli, SJ, Ferreira, AR, Cernadas, JR, del Campo García, A, Fernández, SP, Carrera, NS, Sánchez-Cruz, FB, Lorenzo, JRF, Claus, S, Pföhler, C, Ruëff, F, Treudler, R, Jaume, ME, Madroñero, A, Perez, MTG, Julia, JC, Plovdiv, CH, Gethings, L, Langridge, J, Adel-Patient, K, Bernard, H, Barcievic-Jones, I, Sokolova, R, Yankova, R, Ivanovska, M, Murdjeva, M, Popova, T, Dermendzhiev, S, Karjalainen, M, Lehnigk, U, Brown, D, Locklear, JC, Locklear, J, Maris, I, Hourihane, J, Ornelas, C, Caiado, J, Ferreira, MB, Pereira-Barbosa, M, Puente, Y, Daza, JC, Monteseirin, FJ, Ukleja-Sokolowska, N, Gawronska-Ukleja, E, Zbikowska-Gotz, M, Bartuzi, Z, Sokolowski, L, Adams, A, Mahon, B, English, K, Gourdon-Dubois, N, Sellam, L, Pereira, B, Michaud, E, Messaoudi, K, Evrard, B, Fauquert, J-L, Palomares, F, Gomez, G, Rodriguez, MJ, Galindo, L, Molina, A, Paparo, L, Mennini, M, Aitoro, R, Wawrzeńczyk, A, Przybyszewski, M, Sarıcoban, HE, Ugras, M, Yalvac, Z, Flokstra-de Blok, BMJ, van der Velde, JL, Vereda, A, Ippolito, C, Traversa, A, Adriano, D, Bianchi, DM, Gallina, S, Decastelli, L, Makatsori, M, Miles, A, Devetak, SP, Devetak, I, Tabet, SA, Trandbohus, JF, Winther, P, Malling, H-J, Hansen, KS, Garvey, LH, Wang, C-C, Cheng, Y-H, Tung, C-W, Dietrich, M, Marenholz, I, Kalb, B, Grosche, S, Blümchen, K, Schlags, R, Price, M, Rietz, S, Esparza-Gordillo, J, Lau, S, Lee, Y-A, Almontasheri, A, Bahkali, MA, Elshorbagi, S, Alfhaid, A, Altamimi, M, Madbouly, E, Al-Dhekri, H, Arnaout, RK, Basagaña, M, Miquel, S, Bartolomé, B, Brix, B, Rohwer, S, Brandhoff, S, Berger, A, Suer, W, Weimann, A, Bueno, C, Martín-Pedraza, L, Abián, S, Segundo-Acosta, PS, López-Rodríguez, JC, Barderas, R, Batanero, E, Cuesta-Herranz, J, Villalba, MT, Correia, M, Benito-Garcia, F, Arêde, C, Piedade, S, Morais-Almeida, M, Hindley, J, Yarham, R, Kuklinska-Pijanka, A, Gillick, D, Patient, K, Chapman, MD, Miranda, A, Matos, E, Sokolova, A, Rao, H, Baricevic-Jones, I, Smith, F, Xue, W, Magnusdottir, H, Vidarsdottir, AG, Lund, S, Jensen, AB, Ludviksson, BR, Simon, R, Elfont, R, Bennett, S, Voyksner, R, de Lurdes Torre, M, Yürek, S, Faber, MA, Bastiaensen, A, Mangodt, E, van Gasse, A, Decuyper, I, Sabato, V, Hagendorens, MM, Bridts, CH, De Clerck, LS, Ebo, D, Schwarz, S, Ziegert, M, Albroscheit, S, Schwager, C, Kull, S, Behrends, J, Röckendorf, N, Schocker, F, Frey, A, Homann, A, Becker, W-M, Jappe, U, Zaabat, N, Osscini, S, Agabriel, C, Sterling, B, Carsin, A, Liabeuf, V, Maćków, M, Zbróg, A, Bronkowska, M, Courtois, J, Gadisseur, R, Bertholet, C, Lukas, P, Cavalier, E, Delahaut, P, Quinting, B, Gertmo, MB, Hasseus, ET, Barzylovych, V, Oliveira, J, Ensina, LF, Aranda, CS, Dopazo, L, Lopez, R, Perez, R, Santos-Diez, L, Bilbao, A, Garcia, JM, Núñez, IG, Mármol, MÁA, Villarejo, MJB, Martos, JAB, Vergara, MS, García, JMI, Michalska, A, Sergiejko, G, Zacniewski, R, Ghiordanescu, I-M, Deaconu, C, Popescu, M, Bumbacea, RS, Ibranji, A, Nikolla, E, Loloci, G, Juel-Berg, N, Larsen, LF, Poulsen, LK, Marcelino, J, Prata, R, Costa, AC, Duarte, F, Neto, M, Santos, J, Pestana, LC, Sampaio, D, Minale, P, Dignetti, P, Bignardi, D, Nedelea, I, Popescu, F-D, Vieru, M, Secureanu, F-A, Ganea, CS, Vieira, M, Silva, JPM, Watts, T, Watts, S, Lomikovska, M, Peredelskaya, M, Nenasheva, N, Filipovic, I, Zivkovic, Z, Filipovic, D, Higgs, J, Warner, A, and Jones, C

Published
2017

24. Targeting the late component of the cardiac L-type Ca2+ current to suppress early afterdepolarizations

Author

Madhvani, RV, Angelini, M, Xie, Y, Pantazis, A, Suriany, S, Borgstrom, NP, Garfinkel, A, Qu, Z, Weiss, JN, and Olcese, R

Subjects
cardiovascular system
Abstract

© 2015 Madhvani et al. Early afterdepolarizations (EADs) associated with prolongation of the cardiac action potential (AP) can create heterogeneity of repolarization and premature extrasystoles, triggering focal and reentrant arrhythmias. Because the L-type Ca2+ current (ICa,L) plays a key role in both AP prolongation and EAD formation, L-type Ca2+ channels (LTCCs) represent a promising therapeutic target to normalize AP duration (APD) and suppress EADs and their arrhythmogenic consequences. We used the dynamic-clamp technique to systematically explore how the biophysical properties of LTCCs could be modified to normalize APD and suppress EADs without impairing excitation-contraction coupling. Isolated rabbit ventricular myocytes were first exposed to H2O2 or moderate hypokalemia to induce EADs, after which their endogenous ICa,L was replaced by a virtual ICa,L with tunable parameters, in dynamicclamp mode. We probed the sensitivity of EADs to changes in the (a) amplitude of the noninactivating pedestal current; (b) slope of voltage-dependent activation; (c) slope of voltage-dependent inactivation; (d) time constant of voltage-dependent activation; and (e) time constant of voltage-dependent inactivation. We found that reducing the amplitude of the noninactivating pedestal component of ICa,L effectively suppressed both H2O2- and hypokalemia-induced EADs and restored APD. These results, together with our previous work, demonstrate the potential of this hybrid experimental-computational approach to guide drug discovery or gene therapy strategies by identifying and targeting selective properties of LTCC.

Published
2015
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25. The impact of age on serum allergen-specific IgE to inhaled molecular components

Author

Tosca, M.A., Silvestri, M., Olcese, R., Pistorio, A., Rossi, G.A., and Ciprandi, G.

Abstract

Respiratory allergy is characterised by an IgE-mediated reaction. The immune system functions, including IgE production, progressively decline over time, such as growing up and ageing. Molecular-based allergy diagnostic defines sensitisation profile. This study aimed to evaluate the impact of age on serum allergen-specific IgE to molecular component levels in a large sample of subjects.

Published
2024
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39. Remodeling of Kv4.3 potassium channel gene expression under the control of sex hormones.

Author

Song, M, Helguera, G, Eghbali, M, Zhu, N, Zarei, M M, Olcese, R, Toro, L, and Stefani, E

Abstract

Kv4.3 channels are important molecular components of transient K(+) currents (Ito currents) in brain and heart. They are involved in setting the frequency of neuronal firing and heart pacing. Altered Kv4.3 channel expression has been demonstrated under pathological conditions like heart failure indicating their critical role in heart function. Thyroid hormone studies suggest that their expression in the heart may be hormonally regulated. To explore the possibility that sex hormones control Kv4.3 expression, we investigated whether its expression changes in the pregnant uterus. This organ represents a unique model to study Ito currents, because it possesses this type of K(+) current and undergoes dramatic changes in function and excitability during pregnancy. We cloned Kv4.3 channel from myometrium and found that its protein and transcript expression is greatly diminished during pregnancy. Experiments in ovariectomized rats demonstrate that estrogen is one mechanism responsible for the dramatic reduction in Kv4.3 expression and function prior to parturition. Furthermore, the reduction of plasma membrane Kv4.3 protein is accompanied by a perinuclear localization suggesting that cell trafficking is also controlled by sex hormones. Thus, estrogen remodels the expression of Kv4.3 in myometrium by directly diminishing its transcription and, indirectly, by altering Kv4.3 delivery to the plasma membrane.

Published
2001
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45. Consensus statement of the Italian society of pediatric allergy and immunology for the pragmatic management of children and adolescents with allergic or immunological diseases during the COVID-19 pandemic

Author

Fabio Cardinale, Giorgio Ciprandi, Salvatore Barberi, Roberto Bernardini, Carlo Caffarelli, Mauro Calvani, Giovanni Cavagni, Elena Galli, Domenico Minasi, Michele Miraglia Del Giudice, Viviana Moschese, Elio Novembre, Francesco Paravati, Diego G Peroni, Maria Angela Tosca, Giovanni Traina, Salvatore Tripodi, Gian Luigi Marseglia, Doriana Amato, Caterina Anania, Elisa Anastasio, Rachele Antignani, Stefania Arasi, Martire Baldassarre, Ermanno Baldo, Andrea Barbalace, Simona Barni, Federica Betti, Annamaria Bianchi, Ezio Bolzacchini, Maira Bonini, Paolo Bottau, Sara Bozzetto, Maria Antonia Brighetti, Davide Caimmi, Silvia Caimmi, Luigi Calzone, Caterina Cancrini, Lucia Caminiti, Giulia Capata, Lucetta Capra, Carlo Capristo, Elena Carboni, Francesco Carella, Riccardo Castagnoli, Elena Chiappini, Fernanda Chiera, Iolanda Chinellato, Loredana Chini, Francesca Cipriani, Flavio Civitelli, Pasquale Comberiati, Daniele Contini, Stefania Corrente, Claudio Cravidi, Giuseppe Crisafulli, Barbara Cuomo, Enza D'Auria, Sofia D'Elios, Fabio Decimo, Auro Della Giustina, Rosa Maria Delle Piane, Maria De Filippo, Valentina De Vittori, Lucia Diaferio, Maria Elisa Di Cicco, Dora Di Mauro, Marzia Duse, Silvia Federici, Giuseppe Felice, Maria Grazia Fenu, Giuliana Ferrante, Tiziana Foti, Fabrizio Franceschini, Daniele Ghiglioni, Giuliana Giardino, Mattia Giovannini, Giovanni Cosimo Indirli, Cristiana Indolfi, Massimo Landi, Francesco La Torre, Lucia Maddalena Leone, Amelia Licari, Lucia Liotti, Vassilios Lougaris, Nunzia Maiello, Paride Mantecca, Sara Manti, Marco Maria Mariani, Alberto Martelli, Carla Mastrorilli, Violetta Mastrorilli, Davide Montin, Francesca Mori, Roberta Olcese, Giorgio Ottaviano, Claudia Paglialunga, Giovanni Pajno, Giuseppe Parisi, Stefano Pattini, Luca Pecoraro, Umberto Pelosi, Claudio Pignata, Giampaolo Ricci, Silvia Ricci, Stefano Rizzi, Caterina Rizzo, Sara Rosati, Paolo Rosso, Maria Sangerardi, Angelica Santoro, Francesca Saretta, Lucrezia Sarti, Marco Sartorio, Majla Sgruletti, Annarosa Soresina, Ifigenia Sfika, Mayla Sgrulletti, Nuccia Tesse, Valentina Tranchino, Alessandro Travaglini, Malizia Velia, Elvira Verduci, Mario Vernich, Elisabetta Veronelli, Stefano Volpi, Martina Votto, Anna Maria Zicari, Cardinale, F., Ciprandi, G., Barberi, S., Bernardini, R., Caffarelli, C., Calvani, M., Cavagni, G., Galli, E., Minasi, D., Del Giudice, M. M., Moschese, V., Novembre, E., Paravati, F., Peroni, D. G., Tosca, M. A., Traina, G., Tripodi, S., Marseglia, G. L., Amato, D., Anania, C., Anastasio, E., Antignani, R., Arasi, S., Baldassarre, M., Baldo, E., Barbalace, A., Barni, S., Betti, F., Bianchi, A., Bolzacchini, E., Bonini, M., Bottau, P., Bozzetto, S., Brighetti, M. A., Caimmi, D., Caimmi, S., Calzone, L., Cancrini, C., Caminiti, L., Capata, G., Capra, L., Capristo, C., Carboni, E., Carella, F., Castagnoli, R., Chiappini, E., Chiera, F., Chinellato, I., Chini, L., Cipriani, F., Civitelli, F., Comberiati, P., Contini, D., Corrente, S., Cravidi, C., Crisafulli, G., Cuomo, B., D'Auria, E., D'Elios, S., Decimo, F., Giustina, A. D., Piane, R. M. D., De Filippo, M., De Vittori, V., Diaferio, L., Di Mauro, M. E., Duse, M., Federici, S., Felice, G., Fenu, G., Ferrante, G., Foti, T., Franceschini, F., Ghiglioni, D., Giardino, G., Giovannini, M., Indirli, G. C., Indolfi, C., Landi, M., La Torre, F., Leone, L. M., Licari, A., Liotti, L., Lougaris, V., Maiello, N., Mantecca, P., Manti, S., Mariani, M. M., Martelli, A., Mastrorilli, C., Mastrorilli, V., Montin, D., Mori, F., Olcese, R., Ottaviano, G., Paglialunga, C., Pajno, G., Parisi, G., Pattini, S., Pecoraro, L., Pelosi, U., Pignata, C., Ricci, G., Ricci, S., Rizzi, S., Rizzo, C., Rosati, S., Rosso, P., Sangerardi, M., Santoro, A., Saretta, F., Sarti, L., Sartorio, M., Sgruletti, M., Soresina, A., Sfika, I., Sgrulletti, M., Tesse, N., Tranchino, V., Travaglini, A., Velia, M., Verduci, E., Vernich, M., Veronelli, E., Volpi, S., Votto, M., Zicari, A. M., Cardinale, Fabio, Ciprandi, Giorgio, Barberi, Salvatore, Bernardini, Roberto, Caffarelli, Carlo, Calvani, Mauro, Cavagni, Giovanni, Galli, Elena, Minasi, Domenico, Del Giudice, Michele Miraglia, Moschese, Viviana, Novembre, Elio, Paravati, Francesco, Peroni, Diego G, Tosca, Maria Angela, Traina, Giovanni, Tripodi, Salvatore, Marseglia, Gian Luigi, SIAIP task force Pignata, Claudio, Cardinale, F, Ciprandi, G, Barberi, S, Bernardini, R, Caffarelli, C, Calvani, M, Cavagni, G, Galli, E, Minasi, D, Del Giudice, M, Moschese, V, Novembre, E, Paravati, F, Peroni, D, Tosca, M, Traina, G, Tripodi, S, Marseglia, G, Amato, D, Anania, C, Anastasio, E, Antignani, R, Arasi, S, Baldassarre, M, Baldo, E, Barbalace, A, Barni, S, Betti, F, Bianchi, A, Bolzacchini, E, Bonini, M, Bottau, P, Bozzetto, S, Brighetti, M, Caimmi, D, Caimmi, S, Calzone, L, Cancrini, C, Caminiti, L, Capata, G, Capra, L, Capristo, C, Carboni, E, Carella, F, Castagnoli, R, Chiappini, E, Chiera, F, Chinellato, I, Chini, L, Cipriani, F, Civitelli, F, Comberiati, P, Contini, D, Corrente, S, Cravidi, C, Crisafulli, G, Cuomo, B, D'Auria, E, D'Elios, S, Decimo, F, Giustina, A, Piane, R, De Filippo, M, De Vittori, V, Diaferio, L, Di Mauro, M, Duse, M, Federici, S, Felice, G, Fenu, G, Ferrante, G, Foti, T, Franceschini, F, Ghiglioni, D, Giardino, G, Giovannini, M, Indirli, G, Indolfi, C, Landi, M, La Torre, F, Leone, L, Licari, A, Liotti, L, Lougaris, V, Maiello, N, Mantecca, P, Manti, S, Mariani, M, Martelli, A, Mastrorilli, C, Mastrorilli, V, Montin, D, Mori, F, Olcese, R, Ottaviano, G, Paglialunga, C, Pajno, G, Parisi, G, Pattini, S, Pecoraro, L, Pelosi, U, Pignata, C, Ricci, G, Ricci, S, Rizzi, S, Rizzo, C, Rosati, S, Rosso, P, Sangerardi, M, Santoro, A, Saretta, F, Sarti, L, Sartorio, M, Sgruletti, M, Soresina, A, Sfika, I, Sgrulletti, M, Tesse, N, Tranchino, V, Travaglini, A, Velia, M, Verduci, E, Vernich, M, Veronelli, E, Volpi, S, Votto, M, Zicari, A, and Fabio Cardinale, Giorgio Ciprandi, Salvatore Barberi, Roberto Bernardini, Carlo Caffarelli, Mauro Calvani, Giovanni Cavagni, Elena Galli, Domenico Minasi, Michele Miraglia Del Giudice, Viviana Moschese, Elio Novembre, Francesco Paravati, Diego G Peroni, Maria Angela Tosca, Giovanni Traina, Salvatore Tripodi, Gian Luigi Marseglia, Doriana Amato, Caterina Anania, Elisa Anastasio, Rachele Antignani, Stefania Arasi, Martire Baldassarre, Ermanno Baldo, Andrea Barbalace, Simona Barni, Federica Betti, Annamaria Bianchi, Ezio Bolzacchini, Maira Bonini, Paolo Bottau, Sara Bozzetto, Maria Antonia Brighetti, Davide Caimmi, Silvia Caimmi, Luigi Calzone, Caterina Cancrini, Lucia Caminiti, Giulia Capata, Lucetta Capra, Carlo Capristo, Elena Carboni, Francesco Carella, Riccardo Castagnoli, Elena Chiappini, Fernanda Chiera, Iolanda Chinellato, Loredana Chini, Francesca Cipriani, Flavio Civitelli, Pasquale Comberiati, Daniele Contini, Stefania Corrente, Claudio Cravidi, Giuseppe Crisafulli, Barbara Cuomo, Enza D'Auria, Sofia D'Elios, Fabio Decimo, Auro Della Giustina, Rosa Maria Delle Piane, Maria De Filippo, Valentina De Vittori, Lucia Diaferio, Maria Elisa Di Cicco, Dora Di Mauro, Marzia Duse, Silvia Federici, Giuseppe Felice, Maria Grazia Fenu, Giuliana Ferrante, Tiziana Foti, Fabrizio Franceschini, Daniele Ghiglioni, Giuliana Giardino, Mattia Giovannini, Giovanni Cosimo Indirli, Cristiana Indolfi, Massimo Landi, Francesco La Torre, Lucia Maddalena Leone, Amelia Licari, Lucia Liotti, Vassilios Lougaris, Nunzia Maiello, Paride Mantecca, Sara Manti, Marco Maria Mariani, Alberto Martelli, Carla Mastrorilli, Violetta Mastrorilli, Davide Montin, Francesca Mori, Roberta Olcese, Giorgio Ottaviano, Claudia Paglialunga, Giovanni Pajno, Giuseppe Parisi, Stefano Pattini, Luca Pecoraro, Umberto Pelosi, Claudio Pignata, Giampaolo Ricci, Silvia Ricci, Stefano Rizzi, Caterina Rizzo, Sara Rosati, Paolo Rosso, Maria Sangerardi, Angelica Santoro, Francesca Saretta, Lucrezia Sarti, Marco Sartorio, Majla Sgruletti, Annarosa Soresina, Ifigenia Sfika, Mayla Sgrulletti, Nuccia Tesse, Valentina Tranchino, Alessandro Travaglini, Malizia Velia, Elvira Verduci, Mario Vernich, Elisabetta Veronelli, Stefano Volpi, Martina Votto, Anna Maria Zicari

Subjects
Allergy, Review, 030207 dermatology & venereal diseases, Settore MED/38 - Pediatria Generale E Specialistica, 0302 clinical medicine, COVID-19, Child, Pandemic, Immunologic disease, Asthma, Adolescent, Viral, 030212 general & internal medicine, Disease management (health), Societies, Medical, pandemic, child, adolescent, allergy, asthma, immunologic disease, Incidence (epidemiology), lcsh:RJ1-570, Disease Management, General Medicine, Atopic dermatitis, Settore MED/38, Coronavirus Infections, Decision Making, Humans, Italy, Pneumonia, Viral, Pragmatic Clinical Trials as Topic, SARS-CoV-2, Allergy and Immunology, Betacoronavirus, Consensus, Pandemics, Latex allergy, Human, Telemedicine, Consensu, 03 medical and health sciences, Medical, medicine, Risk factor, Betacoronaviru, business.industry, Coronavirus Infection, lcsh:Pediatrics, Pneumonia, medicine.disease, Immunology, Societies, business, Rare disease
Abstract

The COVID-19 pandemic has surprised the entire population. The world has had to face an unprecedented pandemic. Only, Spanish flu had similar disastrous consequences. As a result, drastic measures (lockdown) have been adopted worldwide. Healthcare service has been overwhelmed by the extraordinary influx of patients, often requiring high intensity of care. Mortality has been associated with severe comorbidities, including chronic diseases. Patients with frailty were, therefore, the victim of the SARS-COV-2 infection. Allergy and asthma are the most prevalent chronic disorders in children and adolescents, so they need careful attention and, if necessary, an adaptation of their regular treatment plans. Fortunately, at present, young people are less suffering from COVID-19, both as incidence and severity. However, any age, including infancy, could be affected by the pandemic.Based on this background, the Italian Society of Pediatric Allergy and Immunology has felt it necessary to provide a Consensus Statement. This expert panel consensus document offers a rationale to help guide decision-making in the management of children and adolescents with allergic or immunologic diseases.

Published
2020

47. Endotypes of pollen-food syndrome in children with seasonal allergic rhinoconjunctivitis: a molecular classification

Author

Riccardo Asero, Diego Faggian, Roberta Olcese, Loredana Chini, Maria Francesca Patria, Francesco Macrì, Alessandro Travaglini, Serena Perna, Sandra Lucarelli, Carla Mastrorilli, Carlo Caffarelli, M. Miraglia Del Giudice, Viviana Moschese, Umberto Pelosi, Francesca Cipriani, Nunzia Maiello, Mario Plebani, Simone Frediani, A. Di Rienzo-Businco, Giuseppe Pingitore, Roberto Bernardini, I Dello Iacono, Elena Varin, Ifigenia Sfika, Annamaria Bianchi, Giampaolo Ricci, Salvatore Tripodi, Pasquale Comberiati, Anastasia Cirisano, C. Pistoletti, C. Povesi Dascola, Mauro Calvani, Matteo Moretti, Maria Carmen Verga, Tullio Frediani, P M Matricardi, Arianna Dondi, Diego Peroni, Paolo Giordani, Mastrorilli, C., Tripodi, S., Caffarelli, C., Perna, S., Di Rienzo Businco, A., Sfika, I., Asero, R., Dondi, Arianna, Bianchi, A., Povesi Dascola, C., Ricci, Giampaolo, Cipriani, Francesca, Maiello, N., Miraglia Del Giudice, M., Frediani, T., Frediani, S., Macrì, F., Pistoletti, C., Dello Iacono, I., Patria, M. F., Varin, E., Peroni, D., Comberiati, P., Chini, L., Moschese, V., Lucarelli, S., Bernardini, R., Pingitore, G., Pelosi, U., Olcese, R., Moretti, M., Cirisano, A., Faggian, D., Travaglini, A., Plebani, M., Verga, M. C., Calvani, M., Giordani, P., Matricardi, P. M., Dondi, A., Ricci, G., Cipriani, F., Maiello, Nunzia, and MIRAGLIA DEL GIUDICE, Michele

Subjects
Male, pollen-food syndrome, Allergy, Comorbidity, Immunoglobulin E, 0302 clinical medicine, Risk Factors, Immunology and Allergy, 030212 general & internal medicine, Age of Onset, endotype, Child, Prospective cohort study, Sensitization, Conjunctivitis, Allergic, education.field_of_study, panallergens, biology, Syndrome, medicine.anatomical_structure, Italy, classification, endotypes, Child, Preschool, Population Surveillance, panallergen, Pollen, Female, Seasons, oral allergy syndrome, Food Hypersensitivity, Adolescent, Population, Immunology, pollen food syndrome, 03 medical and health sciences, Oral allergy syndrome, children, medicine, cluster analysi, Humans, molecules, education, neoplasms, Skin Tests, Settore MED/38 - Pediatria Generale e Specialistica, molecule, business.industry, allergic rhinoconjunctiviti, Rhinitis, Allergic, Seasonal, allergic rhinoconjunctivitis, Allergens, medicine.disease, cluster analysis, 030228 respiratory system, Food, biology.protein, Age of onset, business
Abstract

Background Pollen-food syndrome (PFS) is heterogeneous with regard to triggers, severity, natural history, comorbidities, and response to treatment. Our study aimed to classify different endotypes of PFS based on IgE sensitization to panallergens. Methods We examined 1271 Italian children (age 4-18 years) with seasonal allergic rhinoconjunctivitis (SAR). Foods triggering PFS were acquired by questionnaire. Skin prick tests were performed with commercial pollen extracts. IgE to panallergens Phl p 12 (profilin), Bet v 1 (PR-10), and Pru p 3 (nsLTP) were tested by ImmunoCAP FEIA. An unsupervised hierarchical agglomerative clustering method was applied within PFS population. Results PFS was observed in 300/1271 children (24%). Cluster analysis identified five PFS endotypes linked to panallergen IgE sensitization: (i) cosensitization to ≥2 panallergens ('multi-panallergen PFS'); (ii-iv) sensitization to either profilin, or nsLTP, or PR-10 ('mono-panallergen PFS'); (v) no sensitization to panallergens ('no-panallergen PFS'). These endotypes showed peculiar characteristics: (i) 'multi-panallergen PFS': severe disease with frequent allergic comorbidities and multiple offending foods; (ii) 'profilin PFS': oral allergy syndrome (OAS) triggered by Cucurbitaceae; (iii) 'LTP PFS': living in Southern Italy, OAS triggered by hazelnut and peanut; (iv) 'PR-10 PFS': OAS triggered by Rosaceae; and (v) 'no-panallergen PFS': mild disease and OAS triggered by kiwifruit. Conclusions In a Mediterranean country characterized by multiple pollen exposures, PFS is a complex and frequent complication of childhood SAR, with five distinct endotypes marked by peculiar profiles of IgE sensitization to panallergens. Prospective studies in cohorts of patients with PFS are now required to test whether this novel classification may be useful for diagnostic and therapeutic purposes in the clinical practice.

Published
2016

48. A Rich Conformational Palette Underlies Human Ca V 2.1-Channel Availability.

Author

Wang K, Nilsson M, Angelini M, Olcese R, Elinder F, and Pantazis A

Abstract

Depolarization-evoked opening of Ca V 2.1 (P/Q-type) Ca 2+ -channels triggers neurotransmitter release, while voltage-dependent inactivation (VDI) limits channel availability to open, contributing to synaptic plasticity. The mechanism of Ca V 2.1 response to voltage is unclear. Using voltage-clamp fluorometry and kinetic modeling, we optically tracked and physically characterized the structural dynamics of the four Ca V 2.1 voltage-sensor domains (VSDs). VSD-I seems to directly drive opening and convert between two modes of function, associated with VDI. VSD-II is apparently voltage-insensitive. VSD-III and VSD-IV sense more negative voltages and undergo voltage-dependent conversion uncorrelated with VDI. Auxiliary β -subunits regulate VSD-I-to-pore coupling and VSD conversion kinetics. Ca V 2.1 VSDs are differentially sensitive to voltage changes brief and long-lived. Specifically the voltage-dependent conformational changes of VSD-I are linked to synaptic release and plasticity., Competing Interests: Competing interests: Authors have no competing interests.

Published
2024
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49. Voltage-dependent G-protein regulation of Ca V 2.2 (N-type) channels.

Author

Nilsson M, Wang K, Mínguez-Viñas T, Angelini M, Berglund S, Olcese R, and Pantazis A

Subjects
Animals, Humans, GTP-Binding Protein beta Subunits metabolism, GTP-Binding Protein gamma Subunits metabolism, GTP-Binding Proteins metabolism, HEK293 Cells, Protein Binding, Calcium Channels, N-Type metabolism, Ion Channel Gating
Abstract

How G proteins inhibit N-type, voltage-gated, calcium-selective channels (Ca V 2.2) during presynaptic inhibition is a decades-old question. G proteins Gβγ bind to intracellular Ca V 2.2 regions, but the inhibition is voltage dependent. Using the hybrid electrophysiological and optical approach voltage-clamp fluorometry, we show that Gβγ acts by selectively inhibiting a subset of the four different Ca V 2.2 voltage-sensor domains (VSDs I to IV). During regular "willing" gating, VSD-I and -IV activations resemble pore opening, VSD III activation is hyperpolarized, and VSD II appears unresponsive to depolarization. In the presence of Gβγ, Ca V 2.2 gating is "reluctant": pore opening and VSD I activation are strongly and proportionally inhibited, VSD IV is modestly inhibited, while VSD III is not. We propose that Gβγ inhibition of VSDs I and IV underlies reluctant Ca V 2.2 gating and subsequent presynaptic inhibition.

Published
2024
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50. Electrical and G-protein Regulation of CaV2.2 (N-type) Channels.

Author

Nilsson M, Wang K, Mínguez-Viñas T, Angelini M, Berglund S, Olcese R, and Pantazis A

Abstract

How G-proteins inhibit N-type, voltage-gated, calcium-selective channels (Ca V 2.2) during presynaptic inhibition is a decades-old question. G-proteins Gβγ bind to intracellular Ca V 2.2 regions, but the inhibition is voltage-dependent. Using the hybrid electrophysiological and optical approach voltage-clamp fluorometry, we show that Gβγ acts by selectively inhibiting a subset of the four different Ca V 2.2 voltage-sensor domains (VSDs I-IV). During regular "willing" gating, VSDs I and IV activation resemble pore opening, VSD III activation is hyperpolarized, and VSD II appears unresponsive to depolarization. In the presence of Gβγ, Ca V 2.2 gating is "reluctant": pore opening and VSD-I activation are strongly and proportionally inhibited, VSD IV is modestly inhibited while VSD III is not. We propose that Gβγ inhibition of VSD-I and -IV underlies reluctant Ca V 2.2 gating and subsequent presynaptic inhibition.

Published
2024
Full Text
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