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1.

001-es BibID:BIBFORM058666
Első szerző:Bacskai Ildikó (immunológus)
Cím:Mesenchymal stromal cell-like cells set the balance of stimulatory and inhibitory signals in monocyte-derived dendritic cells / Ildikó Bacskai, Anett Mázló, Katalin Kis-Tóth, Attila Szabó, György Panyi, Balázs Sarkadi, Ágota Apáti, Éva Rajnavölgyi
Dátum:2015
ISSN:1547-3287
Megjegyzések:The major reservoir of human multipotent mesenchymal stem/stromal cells (MSC) is the bone marrow (BM) with the capability to control hematopoietic stem cell (HSC) development. The regenerative potential of MSC is associated with enhanced endogenous repair and healing mechanisms that modulate inflammatory responses. Our previous results revealed that MSC-like (MSCl) cells derived from pluripotent human embryonic stem cells resemble BM-derived MSC in morphology, phenotype and differentiating potential. Here we investigated the effects of MSCl cells on the phenotype and functions of dendritic cells (DC). To assess how anti-viral immune responses could be regulated by intracellular pattern recognition receptors (PRR) of DC in the presence of MSCl cells we activated DC with the specific ligands of retinoic acid-inducible gene I (RIG-I) helicases and found that activated DC co-cultured with MSCl cells exhibited reduced expression of CD1a and CD83 cell surface molecules serving as phenotypic indicators of DC differentiation and activation, respectively. However, RIG-I-mediated stimulation of DC via specific ligands in the presence of MSCl cells resulted in significantly higher expression of the co-stimulatory molecules CD80 and CD86 than in the presence of BM-MSC. In line with these results the concentration of IL-6, IL-10 and CXCL8 was increased in the supernatant of the DC-MSCl co-cultures, while the secretion of TNF-?, CXCL10, IL-12 and IFN? was reduced. Furthermore, the concerted action of mechanisms involved in the regulation of DC migration resulted in the blockade of cell migration indicating altered DC functionality mediated by MSCl cell-derived signals and mechanisms resulting in a suppressive microenvironment.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
mesenchymal stromal cell
dendritic cell
immunsuppression
RIG-like receptors
matrix metalloproteinases
Megjelenés:Stem Cells And Development. - 24 : 15 (2015), p. 1805-1816. -
További szerzők:Türk-Mázló Anett (1989-) (molekuláris biológus) Kis-Tóth Katalin (1975-) (immunológus) Szabó Attila (1981-) (molekuláris biológus, immunológus, filozófus) Panyi György (1966-) (biofizikus) Sarkadi Balázs Apáti Ágota Rajnavölgyi Éva (1950-) (immunológus)
Pályázati támogatás:TÁMOP 4.2.4. A/2-11-1-2012-0001
TÁMOP
TÁMOP 4.2.2.A-11/1/KONV-2012-0023
TÁMOP
OTKA NK 101538
OTKA
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DOI
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2.

001-es BibID:BIBFORM086399
Első szerző:Detre, Cynthia
Cím:Dual face of ceramide : non-apoptotic Cer-stimuli modulate antigen-specific T-cell activation through blocking plasma membrane ion channels / Detre C., Kiss E., Varga Zoltán, Ludányi Katalin, Pászty K., Enyedi Á., Panyi György, Rajnavölgyi Éva, Matkó János
Dátum:2005
ISSN:1742-464X
Tárgyszavak:Orvostudományok Klinikai orvostudományok idézhető absztrakt
folyóiratcikk
Megjelenés:Febs Journal. - 272 : Suppl1 (2005), p. 193. -
További szerzők:Kiss E. Varga Zoltán (1969-) (biofizikus, szakfordító) Ludányi Katalin (1975-) (immunológus) Pászty Katalin Enyedi Ágnes Panyi György (1966-) (biofizikus) Rajnavölgyi Éva (1950-) (immunológus) Matkó János (1952-) (biológus)
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3.

001-es BibID:BIBFORM005082
Első szerző:Detre, Cynthia
Cím:Death or survival : membrane ceramide controls the fate and activation of antigen-specific T-cells depending on signal strength and duration / Detre, C., Kiss, E., Varga, Z., Ludanyi, K., Paszty, K., Enyedi, A., Kovesdi, D., Panyi, G., Rajnavolgyi, E., Matko, J.
Dátum:2006
ISSN:898-6568 (Print)
Megjegyzések:Sphingomyelinase (SMase)-mediated release of ceramide in the plasma membrane of T-lymphocytes induced by different stimuli such as ligation of Fas/CD95, irradiation, stress, inflammation or anticancer drugs primarily involves mitochondrial apoptosis signaling, but under specific conditions non-apoptotic Fas-signaling was also reported. Here we investigated, using a quantitative simulation model with exogenous C2-ceramide (and SMase), the dependence of activation and fate of T-cells on the strength and duration of ceramide accumulation. A murine, influenza virus hemagglutinin-specific T-helper cell (IP12-7) alone or together with interacting antigen presenting B-cells (APC) was used. C2-ceramide induced apoptosis of TH cells above a 'threshold' stimulus (>25 microM in 'strength' or >30 min in duration), while below the threshold C2-ceramide was non-apoptotic, as confirmed by early and late apoptotic markers (PS-translocation, mitochondrial depolarization, caspase-3 activation, DNA-fragmentation). The modest ceramide stimuli strongly suppressed the calcium response and inhibited several downstream signal events (e.g. ERK1/2-, JNK-phosphorylation, CD69 expression or IL-2 production) in TH cells during both anti-CD3 induced and APC-triggered activation. Ceramide moderately affected the Ca2+ -release from internal stores upon antigen-specific engagement of TCR in immunological synapses, while the influx phase was remarkably reduced in both amplitude and rate, suggesting that the major target(s) of ceramide-effects are membrane-proximal. Ceramide inhibited Kv1.3 potassium channels, store operated Ca2+ -entry (SOC) and depolarized the plasma membrane to which contribution of spontaneously formed ceramide channels is possible. The impaired function of these transporters may be coupled to the quantitative, membrane raft-remodeling effect of ceramide and responsible, in a concerted action, for the suppressed activation. Our results suggest that non-apoptotic Fas stimuli, received from previously activated, FasL+ interacting lymphocytes in the lymph nodes, may negatively regulate subsequent antigen-specific T-cell activation and thus modulate the antigen-specific T-cell response.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
analogs and derivatives
Animals
Antigens,CD95
Apoptosis
B-Lymphocytes
Calcium
Caspase 3
Caspases
Cell Membrane
Cell Survival
Cells
DNA Fragmentation
Human
Humans
Hungary
immunology
Inflammation
Interleukin-2
Kv1.3 Potassium Channel
Lymph Nodes
Lymphocyte Activation
Lymphocytes
Membrane Potentials
metabolism
Mice
pharmacology
physiology
Potassium
Potassium Channels
Receptors,Antigen,T-Cell
Research
Signal Transduction
Sphingomyelin Phosphodiesterase
Sphingosine
Support
Synapses
T-Lymphocytes
T-Lymphocytes, Helper-Inducer
Time Factors
Megjelenés:Cellular Signalling. - 18 : 3 (2006), p. 294-306. -
További szerzők:Kiss Endre (Budapest) Varga Zoltán (1969-) (biofizikus, szakfordító) Ludányi Katalin (1975-) (immunológus) Pászty Katalin Enyedi Ágnes Kövesdi Dorottya Panyi György (1966-) (biofizikus) Rajnavölgyi Éva (1950-) (immunológus) Matkó János (1952-) (biológus)
Internet cím:elektronikus változat
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4.

001-es BibID:BIBFORM004837
Első szerző:Hajas György (biológus)
Cím:New phenotypic, functional and electrophysiological characteristics of KG-1 cells / György Hajas, Emese Zsiros, Tünde László, Péter Hajdú, Sándor Somodi, Bence Réthi, Péter Gogolák, Katalin Ludányi, György Panyi, Éva Rajnavölgyi
Dátum:2004
Megjegyzések:Myeloid dendritic cells (DC) are representatives of a rare and phenotypically diverse population of professional antigen presenting cells possessing high functional heterogeneity and flexibility. Here we studied the phenotypic, functional and electrophysiological characteristics of KG-1 cells, an erythroleukemia model cell line, which shares morphological and physiological similarities with immature and mature myeloid DC. We compared the expression of internalizing receptors and other cell surface molecules, antigen uptake and migration of unstimulated and activated KG-1 cells with the characteristics of immature and mature DC. Unstimulated KG-1 cells were less potent in capturing extracellular materials than immature DC. In contrast to monocyte-derived DC KG-1 cells stimulated by PMA and ionomycin ceased to migrate along the MIP-3beta chemokine gradient despite their high expression of CCR7 chemokine receptor and MDR, a transporter implicated in DC migration. Moreover, we determined the ion channel repertoire of KG-1 cells before and after treatment with PMA and ionomycin by using the patch-clamp technique. We found that both unstimulated and activated KG-1 cells expressed time- and voltage-independent, ChTx sensitive intracellular Ca(2+)-gated potassium conductance suggesting the presence of K(Ca) channels in their membranes. Based on our results we propose that KG-1 cells resemble myeloid DC but also possess unique phenotypic, functional and electrophysiological characteristics.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
analogs and derivatives
Animals
Calcium
Cell Line
Cell Movement
Cells
Dendritic Cells
Dextrans
Fluorescein
Fluorescein-5-isothiocyanate
Humans
Hungary
immunology
Ionomycin
Isoquinolines
Leukemia,Erythroblastic,Acute
metabolism
Patch-Clamp Techniques
physiology
Potassium
Research
Support
Tumor Cells,Cultured
Megjelenés:Immunology Letters. - 92 : 1-2 (2004), p. 97-106. -
További szerzők:Zsíros Emese (1980-) (orvos) László Tünde Hajdu Péter (1975-) (biofizikus) Somodi Sándor (1977-) (belgyógyász) Réthi Bence (1973-) (biológus, immunológus) Gogolák Péter (1968-) (biológus, immunológus) Ludányi Katalin (1975-) (immunológus) Panyi György (1966-) (biofizikus) Rajnavölgyi Éva (1950-) (immunológus)
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5.

001-es BibID:BIBFORM020764
Első szerző:Kis-Tóth Katalin (immunológus)
Cím:Voltage-Gated Sodium Channel Nav1.7 Maintains the Membrane Potential and Regulates the Activation and Chemokine-Induced Migration of a Monocyte-Derived Dendritic Cell Subset / Katalin Kis-Toth, Peter Hajdu, Ildiko Bacskai, Orsolya Szilagyi, Ferenc Papp, Attila Szanto, Edit Posta, Peter Gogolak, Gyorgy Panyi, Eva Rajnavolgyi
Dátum:2011
Megjegyzések:Expression of CD1a protein defines a human dendritic cell (DC) subset with unique functional activities. We aimed to study the expression of the Nav1.7 sodium channel and the functional consequences of its activity in CD1a(-) and CD1a(+) DC. Single-cell electrophysiology (patch-clamp) and quantitative PCR experiments performed on sorted CD1a(-) and CD1a(+) immature DC (IDC) showed that the frequency of cells expressing Na(+) current, current density, and the relative expression of the SCN9A gene encoding Nav1.7 were significantly higher in CD1a(+) cells than in their CD1a(-) counterparts. The activity of Nav1.7 results in a depolarized resting membrane potential (-8.7 +/- 1.5 mV) in CD1a(+) IDC as compared with CD1a(-) cells lacking Nav1.7 (-47 +/- 6.2 mV). Stimulation of DC by inflammatory signals or by increased intracellular Ca(2+) levels resulted in reduced Nav1.7 expression. Silencing of the SCN9A gene shifted the membrane potential to a hyperpolarizing direction in CD1a(+) IDC, resulting in decreased cell migration, whereas pharmacological inhibition of Nav1.7 by tetrodotoxin sensitized the cells for activation signals. Fine-tuning of IDC functions by a voltage-gated sodium channel emerges as a new regulatory mechanism modulating the migration and cytokine responses of these DC subsets
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
ACTIVATION
article
Cells
Electrophysiology
Human
Hungary
immunology
Sodium
Tetrodotoxin
Megjelenés:The Journal of Immunology. - 187 : 3 (2011), p. 1273-1280. -
További szerzők:Hajdu Péter (1975-) (biofizikus) Bacskai Ildikó (1985-) (immunológus) Szilágyi Orsolya (1985-) (molekuláris biológus, biokémikus) Papp Ferenc (1979-) (biofizikus) Szántó Attila (1976-) (orvos, biokémikus) Feketéné Posta Edit (1986-) (reumatológus) Gogolák Péter (1968-) (biológus, immunológus) Panyi György (1966-) (biofizikus) Rajnavölgyi Éva (1950-) (immunológus)
Pályázati támogatás:TÁMOP-4.2.1/B-09/1/KONV-2010-0007
TÁMOP
Molekuláris immunológia
TÁMOP-4.2.2-08/1-2008-0015
TÁMOP
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6.

001-es BibID:BIBFORM005189
Első szerző:Papp Ferenc (biofizikus)
Cím:CRAC channels in developing human dendritic cells / Papp, F., Hajdu, P., Varga, Z., Zsiros, E., Ludanyi, K., Gaspar, R., Rajnavolgyi, E., Panyi, Gy.
Dátum:2008
Tárgyszavak:Orvostudományok Elméleti orvostudományok idézhető absztrakt
Human
Dendritic Cells
Cells
Megjelenés:Biophysical Journal. - 94 : Suppl (2008), p. B290 -
További szerzők:Hajdu Péter (1975-) (biofizikus) Varga Zoltán (1969-) (biofizikus, szakfordító) Zsíros Emese (1980-) (orvos) Ludányi Katalin (1975-) (immunológus) Gáspár Rezső (1944-) (biofizikus) Rajnavölgyi Éva (1950-) (immunológus) Panyi György (1966-) (biofizikus)
Internet cím:elektronikus változat
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7.

001-es BibID:BIBFORM062512
Első szerző:Pethő Zoltán (orvos)
Cím:The anti-proliferative effect of cation channel blockers in T lymphocytes depends on the strength of mitogenic stimulation / Zoltan Petho, Andras Balajthy, Adam Bartok, Krisztian Bene, Sandor Somodi, Orsolya Szilagyi, Eva Rajnavolgyi, Gyorgy Panyi, Zoltan Varga
Dátum:2016
ISSN:0165-2478
Megjegyzések:Ion channels are crucially important for the activation and proliferation of T lymphocytes, and thus, for the function of the immune system. Previous studies on the effects of channel blockers on T cell proliferation reported variable effectiveness due to differing experimental systems. Therefore our aim was to investigate how the strength of the mitogenic stimulation influences the efficiency of cation channel blockers in inhibiting activation, cytokine secretion and proliferation of T cells under standardized conditions. Human peripheral blood lymphocytes were activated via monoclonal antibodies targeting the TCR-CD3 complex and the co-stimulator CD28. We applied the blockers of Kv1.3 (Anuroctoxin), KCa3.1 (TRAM-34) and CRAC (2-Apb) channels of T cells either alone or in combination with rapamycin, the inhibitor of the mammalian target of rapamycin (mTOR). Five days after the stimulation ELISA and flow cytometric measurements were performed to determine IL-10 and IFN-? secretion, cellular viability and proliferation. Our results showed that ion channel blockers and rapamycin inhibit IL-10 and IFN-? secretion and cell division in a dose-dependent manner. Simultaneous application of the blockers for each channel along with rapamycin was the most effective, indicating synergy among the various activation pathways. Upon increasing the extent of mitogenic stimulation the anti-proliferative effect of the ion channel blockers diminished. This phenomenon may be important in understanding the fine-tuning of T cell activation.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Immune regulation
Rapamycin
ion channel
Cytokine secretion
T cells
Megjelenés:Immunology Letters 171 (2016), p. 60-69. -
További szerzők:Balajthy András (1988-) (általános orvos) Bartók Ádám (1984-) (biotechnológus) Bene Krisztián (1986-) (Biológus) Somodi Sándor (1977-) (belgyógyász) Szilágyi Orsolya (1985-) (molekuláris biológus, biokémikus) Rajnavölgyi Éva (1950-) (immunológus) Panyi György (1966-) (biofizikus) Varga Zoltán (1969-) (biofizikus, szakfordító)
Pályázati támogatás:KTIA NAP 13-2-2015-0009
Egyéb
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8.

001-es BibID:BIBFORM010313
Első szerző:Zsíros Emese (orvos)
Cím:Developmental switch of the expression of ion channels in human dendritic cells / Zsiros Emese, Kis-Tóth Katalin, Hajdú Péter, Gáspár Rezső, Joanna Bielansk, Antonio Felipe, Rajnavölgyi Éva, Panyi György
Dátum:2009
ISSN:0022-1767
Megjegyzések:Modulation of the expression and activity of plasma membrane ion channels is one of the mechanisms by which immune cells can regulate their intracellular Ca2(+) signaling pathways required for proliferation and/or differentiation. Voltage-gated K+ channels, inwardly rectifying K+ channels, and Ca2+-activated K+ channels have been described to play a major role in controlling the membrane potential in lymphocytes and professional APCs, such as monocytes, macrophages, and dendritic cells (DCs). Our study aimed at the characterization and identification of ion channels expressed in the course of human DC differentiation from monocytes. We report in this study for the first time that immature monocyte-derived DCs express voltage-gated Na+ channels in their plasma membrane. The analysis of the biophysical and pharmacological properties of the current and PCR-based cloning revealed the presence of Nav1.7 channels in immature DCs. Transition from the immature to a mature differentiation state, however, was accompanied by the down-regulation of Nav1.7 expression concomitant with the up-regulation of voltage-gated Kv1.3 K+ channel expression. The presence of Kv1.3 channels seems to be common for immune cells; hence, selective Kv1.3 blockers may emerge as candidates for inhibiting various functions of mature DCs that involve their migratory, cytokine-secreting, and T cell-activating potential.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Union of Pharmacology
Dependent K+ channel
Human Lymhocytes T
Potassium channels
Sodium Channels
Electrophysiological properties
Peripheral nerve
Immune system
Macrophages
Activation
Megjelenés:The Journal of Immunology 183 : 7 (2009), p. 4483-4492. -
További szerzők:Kis-Tóth Katalin (1975-) (immunológus) Hajdu Péter (1975-) (biofizikus) Gáspár Rezső (1944-) (biofizikus) Bielansk, Joanna Felipe, Antonio Rajnavölgyi Éva (1950-) (immunológus) Panyi György (1966-) (biofizikus)
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